BASELINE: Update Chromium to 85.0.4183.14085-based

Change-Id: Iaa42f4680837c57725b1344f108c0196741f6057
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

10 files changed, 3887 insertions, 0 deletions

diff --git a/chromium/third_party/libbrlapi/BUILD.gn b/chromium/third_party/libbrlapi/BUILD.gn
new file mode 100644
index 00000000000..1928ead2b89
--- /dev/null
+++ b/chromium/third_party/libbrlapi/BUILD.gn
@@ -0,0 +1,28 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//tools/generate_library_loader/generate_library_loader.gni")
+
+generate_library_loader("libbrlapi") {
+  name = "LibBrlapiLoader"
+  output_h = "libbrlapi.h"
+  output_cc = "libbrlapi_loader.cc"
+  header = "<brlapi.h>"
+  bundled_header = "\"third_party/libbrlapi/brlapi.h\""
+
+  functions = [
+    "brlapi_getHandleSize",
+    "brlapi_error_location",
+    "brlapi_strerror",
+    "brlapi__acceptKeys",
+    "brlapi__openConnection",
+    "brlapi__closeConnection",
+    "brlapi__getDisplaySize",
+    "brlapi__enterTtyModeWithPath",
+    "brlapi__leaveTtyMode",
+    "brlapi__writeDots",
+    "brlapi__readKey",
+    "brlapi__getParameter",
+  ]
+}
diff --git a/chromium/third_party/libbrlapi/LICENSE b/chromium/third_party/libbrlapi/LICENSE
new file mode 100644
index 00000000000..b124cf58125
--- /dev/null
+++ b/chromium/third_party/libbrlapi/LICENSE
@@ -0,0 +1,510 @@
+
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diff --git a/chromium/third_party/libbrlapi/OWNERS b/chromium/third_party/libbrlapi/OWNERS
new file mode 100644
index 00000000000..47e691696de
--- /dev/null
+++ b/chromium/third_party/libbrlapi/OWNERS
@@ -0,0 +1,4 @@
+file://ui/accessibility/OWNERS
+
+# TEAM: chromium-accessibility@chromium.org
+# COMPONENT: UI>Accessibility>ChromeVox
diff --git a/chromium/third_party/libbrlapi/README.chromium b/chromium/third_party/libbrlapi/README.chromium
new file mode 100644
index 00000000000..e8b311f78ed
--- /dev/null
+++ b/chromium/third_party/libbrlapi/README.chromium
@@ -0,0 +1,19 @@
+Name: libbrlapi
+URL: http://brltty.app
+Version: 0.8
+License: LGPL 2.1
+Security Critical: yes
+CPEPrefix: cpe:/a:mielke:brltty:3.7.2
+
+Description:
+BRLTTY is a background process (daemon) which provides access to the Linux/Unix
+console (when in text mode) for a blind person using a refreshable braille
+display. It drives the braille display, and provides complete screen review
+functionality. Some speech capability has also been incorporated.
+
+BRLTTY is used in Chrome OS to provide braille output for the ChromeVox screen
+reader. ChromeVox communicates with BRLTTY using libbrlapi, the public client
+api.
+
+The libbrlapi.h header is imported because we need to keep it in sync with the
+libbrlapi so in Chrome OS.
diff --git a/chromium/third_party/libbrlapi/brlapi.h b/chromium/third_party/libbrlapi/brlapi.h
new file mode 100644
index 00000000000..29b543f5a55
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi.h
@@ -0,0 +1,1647 @@
+/* Programs/brlapi.h.  Generated from brlapi.h.in by configure.  */
+/*
+ * libbrlapi - A library providing access to braille terminals for applications.
+ *
+ * Copyright (C) 2002-2020 by
+ *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
+ *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
+ *
+ * libbrlapi comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+/** \file
+ * \brief Types, defines and functions prototypes for \e BrlAPI's library
+ */
+
+#ifndef BRLAPI_INCLUDED
+#define BRLAPI_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* #undef BRLAPI_WIN32 */
+
+/** \defgroup brlapi_version Version of the BrlAPI library
+ * @{ */
+
+/** Library version. */
+#define BRLAPI_RELEASE "0.8.0"
+
+/** Library major version. */
+#define BRLAPI_MAJOR 0
+
+/** Library minor version. */
+#define BRLAPI_MINOR 8
+
+/** Library revision. */
+#define BRLAPI_REVISION 0
+
+/** Returns the version of the library */
+void brlapi_getLibraryVersion(int* major, int* minor, int* revision);
+
+/** @} */
+
+/* Types are defined there */
+#include <sys/types.h>
+
+#ifdef BRLAPI_WIN32
+#include <windows.h>
+#define BRLAPI_STDCALL __stdcall
+#else /* BRLAPI_WIN32 */
+#define BRLAPI_STDCALL
+#endif /* BRLAPI_WIN32 */
+
+#ifdef _MSC_VER
+typedef __int64 uint64_t;
+typedef __int32 uint32_t;
+#define UINT64_C(x) (x##Ui64)
+#define PRIx64 "I64x"
+typedef signed int ssize_t;
+#else /* _MSC_VER */
+
+/* this is for uint*_t */
+#include <stdint.h>
+
+/* NULL is defined there */
+#include <unistd.h>
+
+#include <inttypes.h> /* For PRIx64 */
+#endif                /* _MSC_VER */
+
+#include <wchar.h>
+
+/** \defgroup brlapi_handles BrlAPI handles
+ *
+ * Each function provided by BrlAPI comes in two versions.
+ *
+ * 1. A version whose name is prefixed by brlapi_ for clients opening only
+ * one simultaneous connection with BrlAPI (most frequen case)
+ *
+ * 2. A version whose name is prefixed by brlapi__ for use by clients
+ * wishing to open more than one connection to BrlAPI.
+ *
+ * A function called brlapi__foo is used in exactly the same way as its
+ * brlapi_foo counterpart, except that it takes an additional argument
+ * (the first one), which is a handle letting the client refer to a given
+ * connection in a similar manner to what file descriptors do.
+ *
+ * In case you want to check that your code is not erroneously using brlapi_foo
+ * functions, define BRLAPI_NO_SINGLE_SESSION before including <brlapi.h>: that
+ * will disable the declaration of all single session functions.
+ *
+ * @{ */
+
+/** Type for BrlAPI hanles */
+typedef struct brlapi_handle_t brlapi_handle_t;
+
+/** Returns the size of an object of type brlapi_handle_t in bytes */
+size_t BRLAPI_STDCALL brlapi_getHandleSize(void);
+
+/** @} */
+
+/** \defgroup brlapi_connection Connecting to BrlAPI
+ *
+ * Before calling any other function of the library, calling
+ * brlapi_openConnection() is needed to establish a connection to
+ * \e BrlAPI 's server.
+ * When the connection is not needed any more, brlapi_closeConnection() must be
+ * called to close the connection.
+ *
+ * @{ */
+
+/** Default port number on which connections to \e BrlAPI can be established */
+#define BRLAPI_SOCKETPORTNUM 4101
+#define BRLAPI_SOCKETPORT "4101"
+
+/** Default unix path on which connections to \e BrlAPI can be established */
+#define BRLAPI_SOCKETPATH "/run/brltty/BrlAPI"
+
+/** \e brltty 's settings directory
+ *
+ * This is where authorization key and driver-dependent key names are found
+ * for instance. */
+#define BRLAPI_ETCDIR "/etc"
+
+/** Default name of the file containing \e BrlAPI 's authorization key
+ *
+ * This name is relative to BRLAPI_ETCDIR */
+#define BRLAPI_AUTHKEYFILE "brlapi.key"
+
+/** Default authorization setting */
+#ifdef BRLAPI_WIN32
+/* No authentication by default on Windows */
+#define BRLAPI_DEFAUTH "none"
+#else /* BRLAPI_WIN32 */
+#define BRLAPI_DEFAUTH_KEYFILE "keyfile:" BRLAPI_ETCDIR "/" BRLAPI_AUTHKEYFILE
+
+#ifdef USE_POLKIT
+#define BRLAPI_DEFAUTH_POLKIT "+polkit"
+#else /* USE_POLKIT */
+#define BRLAPI_DEFAUTH_POLKIT ""
+#endif /* USE_POLKIT */
+
+#define BRLAPI_DEFAUTH BRLAPI_DEFAUTH_KEYFILE BRLAPI_DEFAUTH_POLKIT
+#endif /* BRLAPI_WIN32 */
+
+#ifdef __MINGW32__
+typedef HANDLE brlapi_fileDescriptor;
+#else  /* __MINGW32__ */
+typedef int brlapi_fileDescriptor;
+#endif /* __MINGW32__ */
+
+/** \brief Settings structure for \e BrlAPI connection
+ *
+ * This structure holds every parameter needed to connect to \e BrlAPI: which
+ * file the authorization key can be found in and which computer to connect to.
+ *
+ * \par Examples:
+ * \code
+ * brlapi_connectionSettings_t settings;
+ *
+ * settings.auth="/etc/brlapi.key";
+ * settings.host="foo";
+ * \endcode
+ *
+ * \e libbrlapi will read authorization key from file \p /etc/brlapi.key
+ * and connect to the machine called "foo", on the default TCP port.
+ *
+ * \code
+ * settings.host="10.1.0.2";
+ * \endcode
+ *
+ * lets directly enter an IP address instead of a machine name.
+ *
+ * \code
+ * settings.host=":1";
+ * \endcode
+ *
+ * lets \e libbrlapi connect to the local computer, on port
+ * BRLAPI_SOCKETPORTNUM+1
+ *
+ * \sa brlapi_openConnection()
+ */
+typedef struct {
+  /** For security reasons, \e libbrlapi has to get authorized to connect to the
+   * \e BrlAPI server. This can be done via a secret key, for instance. This is
+   * the path to the file which holds it; it will hence have to be readable by
+   * the application.
+   *
+   * Setting \c NULL defaults it to local installation setup or to the content
+   * of the BRLAPI_AUTH environment variable, if it exists. */
+  const char* auth;
+
+  /** This tells where the \e BrlAPI server resides: it might be listening on
+   * another computer, on any TCP port. It should look like "foo:1", which
+   * means TCP port number BRLAPI_SOCKETPORTNUM+1 on computer called "foo".
+   * \note Please check that resolving this name works before complaining
+   *
+   * Settings \c NULL defaults it to localhost, using the local installation's
+   * default TCP port, or to the content of the BRLAPI_HOST environment
+   * variable, if it exists. */
+  const char* host;
+} brlapi_connectionSettings_t;
+
+/* BRLAPI_SETTINGS_INITIALIZER */
+/** Allows to initialize a structure of type \e brlapi_connectionSettings_t *
+ * with default values. */
+#define BRLAPI_SETTINGS_INITIALIZER \
+  { NULL, NULL }
+
+/* brlapi_openConnection */
+/** Open a socket and connect it to \e BrlAPI 's server
+ *
+ * This function first loads an authorization key as specified in settings.
+ * It then creates a TCP socket and connects it to the specified machine, on
+ * the specified port. It writes the authorization key on the socket and
+ * waits for acknowledgement.
+ *
+ * \return the file descriptor, or -1 on error
+ *
+ * \note The file descriptor is returned in case the client wants to
+ * communicate with the server without using \e libbrlapi functions. If it uses
+ * them however, it won't have to pass the file descriptor later, since the
+ * library keeps a copy of it. But that also means that
+ * brlapi_openConnection() may be called several times, but \e libbrlapi
+ * functions will always work with the last call's descriptor
+ *
+ * \par Example:
+ * \code
+ * if (brlapi_openConnection(&settings,&settings)<0) {
+ *  fprintf(stderr,"couldn't connect to BrlAPI at %s: %s\n",
+ *   settings.host, brlapi_strerror(&brlapi_error));
+ *  exit(1);
+ * }
+ * \endcode
+ *
+ * \par Errors:
+ * \e BrlAPI might not be on this TCP port, the host name might not be
+ * resolvable, the authorization may fail,...
+ *
+ * \param desiredSettings this gives the desired connection parameters, as
+ * described in brlapi_connectionSettings_t. If \c NULL, defaults values are
+ * used, so that it is generally a good idea to give \c NULL as default, and
+ * only fill a brlapi_connectionSettings_t structure when the user gave
+ * parameters to the program for instance; \param actualSettings if not \c NULL,
+ * parameters which were actually used are stored here, if the application ever
+ * needs them.
+ *
+ * \sa
+ * brlapi_connectionSettings_t
+ * brlapi_writePacket()
+ * brlapi_readPacketHeader()
+ * brlapi_readPacketContent()
+ * brlapi_readPacket()
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+brlapi_fileDescriptor BRLAPI_STDCALL
+brlapi_openConnection(const brlapi_connectionSettings_t* desiredSettings,
+                      brlapi_connectionSettings_t* actualSettings);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+brlapi_fileDescriptor BRLAPI_STDCALL
+brlapi__openConnection(brlapi_handle_t* handle,
+                       const brlapi_connectionSettings_t* desiredSettings,
+                       brlapi_connectionSettings_t* actualSettings);
+
+/* brlapi_closeConnection */
+/** Cleanly close the socket
+ *
+ * This function locks until a closing acknowledgement is received from the
+ * server. The socket is then freed, so the file descriptor
+ * brlapi_openConnection() gave has no meaning any more
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void BRLAPI_STDCALL brlapi_closeConnection(void);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+void BRLAPI_STDCALL brlapi__closeConnection(brlapi_handle_t* handle);
+
+/** @} */
+
+/** \defgroup brlapi_clientData Setting and getting client data
+ *
+ * Clients can register a pointer to data that can then be used
+ * e.g. in exception handlers.
+ * @{ */
+
+/* brlapi__setClientData */
+/** Register a pointer to client data
+ *
+ * \param data The pointer to the private client data
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void BRLAPI_STDCALL brlapi_setClientData(void* data);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+void BRLAPI_STDCALL brlapi__setClientData(brlapi_handle_t* handle, void* data);
+
+/* brlapi__getClientData */
+/** Retrieves the pointer to the private client data
+ *
+ * \return the pointer to the private client data
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void* BRLAPI_STDCALL brlapi_getClientData(void);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+void* BRLAPI_STDCALL brlapi__getClientData(brlapi_handle_t* handle);
+
+/** @} */
+
+/** \defgroup brlapi_info Getting Terminal information
+ * \brief How to get information about the connected Terminal
+ *
+ * Before using Raw mode or key codes, the application should always check the
+ * type of the connected terminal, to be sure it is really the one it expects.
+ *
+ * One should also check for display size, so as to adjust further displaying
+ * on it.
+ * @{
+ */
+
+/** Maximum name length for names embeded in BrlAPI packets, not counting any
+ * termination \\0 character */
+#define BRLAPI_MAXNAMELENGTH 31
+
+/* brlapi_getDriverName */
+/** Return the complete name of the driver used by \e brltty
+ *
+ * This function fills its argument with the whole name of the braille
+ * driver if available, terminated with a '\\0'.
+ *
+ * \param buffer is the buffer provided by the application;
+ * \param size is the maximum size for the name buffer.
+ *
+ * \return -1 on error, otherwise a positive value giving the size of the needed
+ * buffer (including '\\0'). If that value is bigger than \p size, the value was
+ * truncated and the caller should retry with a bigger buffer accordingly.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_getDriverName(char* buffer, size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__getDriverName(brlapi_handle_t* handle,
+                                         char* buffer,
+                                         size_t size);
+
+/* brlapi_getModelIdentifier */
+/** Return an identifier for the device model used by \e brltty
+ *
+ * This function fills its argument with the whole identifier of the braille
+ * device model if available, terminated with a '\\0'.
+ *
+ * \param buffer is the buffer given by the application;
+ * \param size is the maximum size for the identifier buffer.
+ *
+ * \return -1 on error, otherwise a positive value giving the size of the needed
+ * buffer (including '\\0'). If that value is bigger than \p size, the value was
+ * truncated and the caller should retry with a bigger buffer accordingly.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_getModelIdentifier(char* buffer, size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__getModelIdentifier(brlapi_handle_t* handle,
+                                              char* buffer,
+                                              size_t size);
+
+/* brlapi_getDisplaySize */
+/** Return the size of the braille display */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_getDisplaySize(unsigned int* x, unsigned int* y);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__getDisplaySize(brlapi_handle_t* handle,
+                                          unsigned int* x,
+                                          unsigned int* y);
+
+/** @} */
+
+/** \defgroup brlapi_tty Entering & leaving tty mode
+ * \brief How to take control of ttys for direct braille display / read
+ *
+ * Before being able to write on the braille display, the application must tell
+ * the server which tty it will handle.
+ *
+ * The application must also specify how braille keys will be delivered to it.
+ * Two ways are possible: key codes and commands:
+ *
+ * - key codes are specific to each braille driver, since the raw key code, as
+ *   defined in the driver will be given for each key press.
+ *   Using them leads to building highly driver-dependent applications, which
+ *   can yet sometimes be useful to mimic existing proprietary applications
+ *   for instance.
+ * - commands means that applications will get exactly the same values as
+ *   \e brltty. This allows driver-independent clients, which will hopefully
+ *   be nice to use with a lot of different terminals.
+ * \sa brlapi_readKey()
+ * @{
+ */
+
+/* brlapi_enterTtyMode */
+/** Ask for some tty, with some key mechanism
+ *
+ * \param tty
+ * - If tty>=0 then take control of the specified tty.
+ * - If tty==::BRLAPI_TTY_DEFAULT then take control of the default tty.
+ *
+ * \param driver tells how the application wants brlapi_readKey() to return
+ * key presses. NULL or "" means BRLTTY commands are required,
+ * whereas a driver name means that raw key codes returned by this
+ * driver are expected.
+ *
+ * WINDOWPATH and WINDOWID should be propagated when running remote applications
+ * via ssh, for instance, along with BRLAPI_HOST and the authorization key (see
+ * SendEnv in ssh_config(5) and AcceptEnv in sshd_config(5))
+ *
+ * \return the used tty number on success, -1 on error
+ *
+ * \sa brlapi_leaveTtyMode() brlapi_readKey()
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_enterTtyMode(int tty, const char* driver);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__enterTtyMode(brlapi_handle_t* handle,
+                                        int tty,
+                                        const char* driver);
+
+/** Select the default tty.
+ *
+ * The library takes the following steps:
+ * -# Try to get the tty number from the \c WINDOWID environment variable (for
+ * the \c xterm case).
+ * -# Try to get the tty number from the \c CONTROLVT environment variable.
+ * -# Read \c /proc/self/stat (on \c Linux).
+ *
+ * \sa brlapi_enterTtyMode()
+ */
+#define BRLAPI_TTY_DEFAULT -1
+
+/* brlapi_enterTtyModeWithPath */
+/** Ask for some tty specified by its path in the tty tree, with some key
+ * mechanism
+ *
+ * \param ttys points on the array of ttys representing the tty path to be got.
+ * Can be NULL if nttys is 0.
+ * \param count gives the number of elements in ttys.
+ * \param driver has the same meaning as in brlapi_enterTtyMode()
+ *
+ * Providing nttys == 0 means to get the root.
+ *
+ * \sa brlapi_enterTtyMode()
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_enterTtyModeWithPath(int* ttys,
+                                               int count,
+                                               const char* driver);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__enterTtyModeWithPath(brlapi_handle_t* handle,
+                                                int* ttys,
+                                                int count,
+                                                const char* driver);
+
+/* brlapi_leaveTtyMode */
+/** Stop controlling the tty
+ *
+ * \return 0 on success, -1 on error.
+ *
+ * \sa brlapi_enterTtyMode()
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_leaveTtyMode(void);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__leaveTtyMode(brlapi_handle_t* handle);
+
+/* brlapi_setFocus */
+/** Tell the current tty to brltty
+ *
+ * This is intended for focus tellers, such as brltty, xbrlapi, screen, ...
+ * brlapi_enterTtyMode() must have been called beforehand to tell where this
+ * focus applies in the tty tree.
+ *
+ * \return 0 on success, -1 on error.
+ *
+ * \sa brlapi_enterTtyMode() brlapi_leaveTtyMode()
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_setFocus(int tty);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__setFocus(brlapi_handle_t* handle, int tty);
+
+/** @} */
+
+/** \defgroup brlapi_write Writing on the braille display
+ * \brief Write text to the braille display
+ *
+ * After brlapi_enterTtyMode() has been called, the application can
+ * call one of these functions to write things on the braille display.
+ *
+ * \note Be sure to call brlapi_enterTtyMode() \e before calling brlapi_write(),
+ * or else you'll get an error. This is particularly not always trivial when
+ * writing multithreaded applications.
+ *
+ * \note Dots are coded as described in ISO/TR 11548-1: a dot pattern is coded
+ * by a byte in which bit 0 is set iff dot 1 is up, bit 1 is set iff dot 2 is
+ * up, ... bit 7 is set iff dot 8 is up. This also corresponds to the low-order
+ * byte of the coding of unicode's braille row U+2800.
+ *
+ * \note Text is translated by the server one to one, by just using a simple
+ * wchar_t to pattern table, i.e. no contraction/expansion is performed, because
+ * the client would then have no way to know how wide the output would be and
+ * thus the quantity of text to feed.  If contraction/expansion is desired, the
+ * client should perform it itself (e.g. thanks to liblouis or gnome-braille)
+ * and send the resulting dot patterns.  This is actually exactly the same
+ * problem as font rendering on a graphical display: for better control,
+ * nowadays all font rasterization is performed on the client side, and mere
+ * pixmaps are sent to the X server.
+ *
+ * @{ */
+
+/* brlapi_writeText */
+/** Write the given \\0-terminated string to the braille display
+ *
+ * If the string is too long, it is truncated. If it's too short,
+ * it is padded with spaces. The text is assumed to be in the current
+ * locale charset set by setlocale(3) if it was called, or the locale charset
+ * from the locale environment variables if setlocale(3) was not called.
+ *
+ * \param cursor gives the cursor position; if equal to ::BRLAPI_CURSOR_OFF, no
+ * cursor is shown at all; if cursor==::BRLAPI_CURSOR_LEAVE, the cursor is left
+ * where it is
+ *
+ * \param text points to the string to be displayed.
+ *
+ * \return 0 on success, -1 on error.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_writeText(int cursor, const char* text);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__writeText(brlapi_handle_t* handle,
+                                     int cursor,
+                                     const char* text);
+
+/* brlapi_writeWText */
+/** Write the given \\0-terminated unicode string to the braille display
+ *
+ * If the string is too long, it is truncated. If it's too short,
+ * it is padded with spaces.
+ *
+ * \param cursor gives the cursor position; if equal to ::BRLAPI_CURSOR_OFF, no
+ * cursor is shown at all; if cursor==::BRLAPI_CURSOR_LEAVE, the cursor is left
+ * where it is
+ *
+ * \param text points to the string to be displayed.
+ *
+ * \return 0 on success, -1 on error.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_writeWText(int cursor, const wchar_t* text);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__writeWText(brlapi_handle_t* handle,
+                                      int cursor,
+                                      const wchar_t* text);
+
+/* brlapi_writeDots */
+/** Write the given dots array to the display
+ *
+ * \param dots points on an array of dot information, one per character. Its
+ * size must hence be the same as what brlapi_getDisplaySize() returns.
+ *
+ * \return 0 on success, -1 on error.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_writeDots(const unsigned char* dots);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__writeDots(brlapi_handle_t* handle,
+                                     const unsigned char* dots);
+
+/* brlapi_writeArguments_t */
+/** Structure containing arguments to be given to brlapi_write() */
+typedef struct {
+  int displayNumber /** Display number ::BRLAPI_DISPLAY_DEFAULT == unspecified
+                     */
+      ;
+  unsigned int regionBegin /** Region of display to update, 1st character of
+                              display is 1 */
+      ;
+  unsigned int
+      regionSize /** Number of characters held in text, andMask and orMask. */;
+  char* text /** Text to display, must hold as many characters as the region
+                fields expresses. */
+      ;
+  int textSize /** Size of text in bytes. If -1, strlen() is used for computing
+                  it. */
+      ;
+  unsigned char* andMask /** And attributes; applied first */;
+  unsigned char* orMask /** Or attributes; applied \e after ANDing */;
+  int cursor /** ::BRLAPI_CURSOR_LEAVE == don't touch, ::BRLAPI_CURSOR_OFF ==
+                turn off, 1 = 1st char of display, ... */
+      ;
+  char* charset /** Text charset. NULL means it is assumed to be 8bits, and the
+                   same as the server's. "" means current locale's charset. If
+                   no locale was selected, defaults to NULL's meaning. */
+      ;
+} brlapi_writeArguments_t;
+
+/** Write to the default display on the braille device.
+ *
+ * \sa brlapi_write() brlapi_writeArguments_t
+ */
+#define BRLAPI_DISPLAY_DEFAULT -1
+
+/** Do not change the cursor's state or position.
+ *
+ * \sa brlapi_writeText() brlapi_write() brlapi_writeArguments_t
+ */
+#define BRLAPI_CURSOR_LEAVE -1
+
+/** Do not display the cursor.
+ *
+ * \sa brlapi_writeText() brlapi_write() brlapi_writeArguments_t
+ */
+#define BRLAPI_CURSOR_OFF 0
+
+/* BRLAPI_WRITEARGUMENTS_INITIALIZER */
+/** Allows to initialize a structure of type \e brlapi_writeArguments_t *
+ * with default values:
+ * displayNumber = ::BRLAPI_DISPLAY_DEFAULT; (unspecified)
+ * regionBegin = regionSize = 0; (update the whole display, DEPRECATED and will
+ * be forbidden in next release. You must always express the region you wish to
+ * update)
+ * text = andMask = orMask = NULL; (no text, no attribute)
+ * cursor = ::BRLAPI_CURSOR_LEAVE; (don't touch cursor)
+ */
+#define BRLAPI_WRITEARGUMENTS_INITIALIZER                           \
+  {                                                                 \
+    .displayNumber = BRLAPI_DISPLAY_DEFAULT, .regionBegin = 0,      \
+    .regionSize = 0, .text = NULL, .textSize = -1, .andMask = NULL, \
+    .orMask = NULL, .cursor = BRLAPI_CURSOR_LEAVE, .charset = NULL  \
+  }
+
+/* brlapi_write */
+/** Update a specific region of the braille display and apply and/or masks
+ *
+ * \param arguments gives information necessary for the update
+ *
+ * regionBegin and regionSize must be filled for specifying which part of the
+ * display will be updated, as well as the size (in characters, not bytes) of
+ * the text, andMask and orMask members.
+ *
+ * If given, the "text" field holds the text that will be displayed in the
+ * region.  The char string must hold exactly as many characters as the region
+ * fields express.  For multibyte text, this is the number of \e multibyte
+ * caracters.  Notably, combining and double-width caracters count for 1.
+ *
+ * The actual length of the text in \e bytes may be specified thanks to
+ * textSize.  If -1 is given, it will be computed thanks to strlen(), so "text"
+ * must then be a NUL-terminated string.
+ *
+ * The "andMask" and "orMask" masks, if present, are then applied on top of
+ * the text, one byte per character.  This hence permits the superimposing of
+ * attributes over the text.  For instance, setting an andMask mask full of
+ * BRLAPI_DOTS(1,1,1,1,1,1,0,0) will only keep (logical AND) dots 1-6,
+ * hence dropping dots 7 and 8.  On the contrary, setting an orMask full of
+ * BRLAPI_DOT7|BRLAPI_DOT8 will add (logical OR) dots 7 and 8.
+ *
+ * The "charset" field, if present, specifies the charset of the "text" field.
+ * If it is "", the current locale's charset (if any) is assumed.  Else, the
+ * 8-bit charset of the server is assumed.
+ *
+ * A special invocation is with an unmodified initialized structure: this clears
+ * the client's whole display, letting the display of other applications on
+ * the same tty or of applications "under" the tty appear. See Concurrency
+ * management section of the BrlAPI documentation for more details.
+ *
+ * \return 0 on success, -1 on error.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_write(const brlapi_writeArguments_t* arguments);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__write(brlapi_handle_t* handle,
+                                 const brlapi_writeArguments_t* arguments);
+
+/** @} */
+
+#include "brlapi_keycodes.h"
+
+/** \defgroup brlapi_keys Reading key presses
+ * \brief How to read key presses from the braille terminal
+ *
+ * Once brlapi_enterTtyMode() has been called, the application can call
+ * brlapi_readKey() to read key presses. Either key codes (see \ref
+ * brlapi_keycodes) or commands will be returned, depending on parameters given
+ * to brlapi_enterTtyMode().
+ *
+ * Key presses are buffered, so that calling brlapi_readKey() in non-blocking
+ * mode from time to time should suffice.
+ *
+ * @{
+ */
+
+/* brlapi_expandedKeyCode_t */
+/** Structure holding the components of a key code as returned by
+ * brlapi_expandKeyCode() */
+typedef struct {
+  unsigned int type /** the type value */;
+  unsigned int command /** the command value */;
+  unsigned int argument /** the argument value */;
+  unsigned int flags /** the flags value */;
+} brlapi_expandedKeyCode_t;
+
+/* brlapi_expandKeyCode */
+/** Expand the components of a key code
+ *
+ * \param code the key code to be expanded
+ * \param expansion pointer to the structure that receives the components
+ *
+ * \return 0 on success, -1 on error
+ */
+int BRLAPI_STDCALL brlapi_expandKeyCode(brlapi_keyCode_t code,
+                                        brlapi_expandedKeyCode_t* expansion);
+
+/* brlapi_describedKeyCode_t */
+/** Structure holding the components of a key code as returned by
+ * brlapi_describeKeyCode() */
+typedef struct {
+  const char* type /** the  type name */;
+  const char* command /** the command name */;
+  unsigned int argument /** the argument value */;
+  unsigned int flags /** the flag count */;
+  const char* flag[64 - BRLAPI_KEY_FLAGS_SHIFT] /** the flag names */;
+  brlapi_expandedKeyCode_t values /** the actual values of the components */;
+} brlapi_describedKeyCode_t;
+
+/* brlapi_describeKeyCode */
+/** Describe the components of a key code.
+ *
+ * \param code the keycode to be described
+ * \param description pointer to the structure that receives the description
+ *
+ * \return 0 on success, -1 on error
+ */
+int BRLAPI_STDCALL
+brlapi_describeKeyCode(brlapi_keyCode_t code,
+                       brlapi_describedKeyCode_t* description);
+
+/** Unicode braille row */
+#define BRLAPI_UC_ROW 0x2800UL
+
+/* brlapi_readKey */
+/** Read a key from the braille keyboard
+ *
+ * This function returns one key press's code.
+ *
+ * If NULL or "" was given to brlapi_enterTtyMode(), a \e brltty command is
+ * returned, as described in the documentation for ::brlapi_keyCode_t . It is
+ * hence pretty driver-independent, and should be used by default when no other
+ * option is possible.
+ *
+ * By default, all commands but those which restart drivers and switch
+ * virtual terminals are returned to the application and not to brltty.
+ * If the application doesn't want to see some command events,
+ * it should call brlapi_ignoreKeys()
+ *
+ * If some driver name was given to brlapi_enterTtyMode(), a raw keycode is
+ * returned, as specified by the terminal driver, usually in <brltty/brldefs-xy>
+ * where xy is the driver's code. It generally corresponds to the very code that
+ * the terminal tells to the driver. This should only be used by applications
+ * which are dedicated to a particular braille terminal. Hence, checking the
+ * terminal type thanks to a call to brlapi_getDriverName() before getting tty
+ * control is a pretty good idea.
+ *
+ * By default, all the keypresses will be passed to the client, none will go
+ * through brltty, so the application will have to handle console switching
+ * itself for instance.
+ *
+ * \param wait tells whether the call should block until a key is pressed (1)
+ *  or should only probe key presses (0);
+ * \param code holds the key code if a key press is indeed read.
+ *
+ * \return -1 on error or signal interrupt and *code is then undefined, 0 if
+ * block was 0 and no key was pressed so far, or 1 and *code holds the key code.
+ *
+ * Programming hints:
+ *
+ * If your application is only driven by braille command keypresses, you can
+ * just call brlapi_readKey(1, &code) so that it keeps blocking, waiting for
+ * keypresses.
+ *
+ * Else, you'll probably want to use the file descriptor returned by
+ * brlapi_openConnection() in your "big polling loop". For instance:
+ *
+ * - in a \c select() loop, just add it to the \c readfds and \c exceptfds file
+ *   descriptor sets;
+ * - in a gtk or atspi application, use
+ *   \c g_io_add_watch(fileDescriptor, \c G_IO_IN|G_IO_ERR|G_IO_HUP, \c f, \c
+ * data) for adding a callback called \c f;
+ * - in an Xt/Xaw/motif-based application, use
+ *   \c XtAppAddInput(app_context, \c fileDescriptor, \c
+ * XtInputReadMask|XtInputExceptMask, \c f, \c data)
+ * - etc.
+ *
+ * and then, when you detect inbound trafic on the file descriptor, do something
+ * like this:
+ *
+ * while (brlapi_readKey(0, &code) {
+ *    // process keycode code
+ *    // ...
+ * }
+ *
+ * The \c while loop is needed for processing \e all pending key presses, else
+ * some of them may be left in libbrlapi's internal key buffer and you wouldn't
+ * get them immediately.
+ *
+ * \note If the read is interrupted by a signal, brlapi_readKey() will return
+ * -1, brlapi_errno will be BRLAPI_ERROR_LIBCERR and errno will be EINTR.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_readKey(int wait, brlapi_keyCode_t* code);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__readKey(brlapi_handle_t* handle,
+                                   int wait,
+                                   brlapi_keyCode_t* code);
+
+/* brlapi_readKeyWithTimeout */
+/** Read a key from the braille keyboard, unless a timeout expires
+ *
+ * This function works like brlapi_readKey, except that parameter \e wait is
+ * replaced by a \e timeout_ms parameter
+ *
+ * \param timeout_ms specifies how long the function should wait for a keypress.
+ * \param code holds the key code if a key press is indeed read.
+ *
+ * \return -1 on error or signal interrupt and *code is then undefined, 0 if
+ * the timeout expired and no key was pressed, or 1 and *code holds the key
+ * code.
+ *
+ * If the timeout expires without any key being pressed, 0 is returned.
+ *
+ * If timeout_ms is set to 0, this function looks for key events that have been
+ * already received, but does not wait at all if no event was received.
+ *
+ * If timeout_ms is set to a negative value, this function behaves like
+ * brlapi_readKey, i.e. it uses an infinite timeout.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_readKeyWithTimeout(int timeout_ms,
+                                             brlapi_keyCode_t* code);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__readKeyWithTimeout(brlapi_handle_t* handle,
+                                              int timeout_ms,
+                                              brlapi_keyCode_t* code);
+
+/** types of key ranges */
+typedef enum {
+  brlapi_rangeType_all,     /**< all keys, code must be 0 */
+  brlapi_rangeType_type,    /**< all keys of a given type */
+  brlapi_rangeType_command, /**< all keys of a given command block, i.e.
+                               matching the key type and command parts */
+  brlapi_rangeType_key,     /**< a given key with any flags */
+  brlapi_rangeType_code,    /**< a given key code */
+} brlapi_rangeType_t;
+
+/* brlapi_ignoreKeys */
+/** Ignore some key presses from the braille keyboard
+ *
+ * This function asks the server to give the provided keys to \e brltty, rather
+ * than returning them to the application via brlapi_readKey().
+ *
+ * \param type type of keys to be ignored
+ * \param keys array of keys to be ignored
+ * \param count number of keys
+ *
+ * \note The given codes should be \e brltty commands (NULL or "" was given to
+ * brlapi_enterTtyMode())
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_ignoreKeys(brlapi_rangeType_t type,
+                                     const brlapi_keyCode_t keys[],
+                                     unsigned int count);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__ignoreKeys(brlapi_handle_t* handle,
+                                      brlapi_rangeType_t type,
+                                      const brlapi_keyCode_t keys[],
+                                      unsigned int count);
+
+/* brlapi_acceptKeys */
+/** Accept some key presses from the braille keyboard
+ *
+ * This function asks the server to give the provided keys to the application,
+ * and not give them to \e brltty.
+ *
+ * \param type type of keys to be ignored
+ * \param keys array of keys to be ignored
+ * \param count number of keys
+ *
+ * \note The given codes should be \e brltty commands (NULL or "" was given to
+ * brlapi_enterTtyMode())
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_acceptKeys(brlapi_rangeType_t type,
+                                     const brlapi_keyCode_t keys[],
+                                     unsigned int count);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__acceptKeys(brlapi_handle_t* handle,
+                                      brlapi_rangeType_t type,
+                                      const brlapi_keyCode_t keys[],
+                                      unsigned int count);
+
+/* brlapi_ignoreAllKeys */
+/** Ignore all key presses from the braille keyboard
+ *
+ * This function asks the server to give all keys to \e brltty, rather than
+ * returning them to the application via brlapi_readKey().
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_ignoreAllKeys(void);
+#define brlapi_ignoreAllKeys() brlapi_ignoreKeys(brlapi_rangeType_all, NULL, 0)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__ignoreAllKeys(brlapi_handle_t* handle);
+#define brlapi__ignoreAllKeys(handle) \
+  brlapi__ignoreKeys(handle, brlapi_rangeType_all, NULL, 0)
+
+/* brlapi_acceptAllKeys */
+/** Accept all key presses from the braille keyboard
+ *
+ * This function asks the server to give all keys to the application, and not
+ * give them to \e brltty.
+ *
+ * Warning: after calling this function, make sure to call brlapi_ignoreKeys()
+ * for ignoring important keys like BRL_CMD_SWITCHVT_PREV/NEXT and such.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_acceptAllKeys(void);
+#define brlapi_acceptAllKeys() brlapi_acceptKeys(brlapi_rangeType_all, NULL, 0)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__acceptAllKeys(brlapi_handle_t* handle);
+#define brlapi__acceptAllKeys(handle) \
+  brlapi__acceptKeys(handle, brlapi_rangeType_all, NULL, 0)
+
+/** Type for raw keycode ranges
+ *
+ * Denotes the set of keycodes between \e first and \e last (inclusive)
+ */
+typedef struct {
+  brlapi_keyCode_t first; /**< first key of the range */
+  brlapi_keyCode_t last;  /**< last key of the range */
+} brlapi_range_t;
+
+/* brlapi_ignoreKeyRanges */
+/** Ignore some key presses from the braille keyboard
+ *
+ * This function asks the server to give the provided key ranges to \e brltty,
+ * rather than returning them to the application via brlapi_readKey().
+ *
+ * \param ranges key ranges, which are inclusive
+ * \param count number of ranges
+ *
+ * \note The given codes should be raw keycodes (i.e. some driver name was given
+ * to brlapi_enterTtyMode()) */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_ignoreKeyRanges(const brlapi_range_t ranges[],
+                                          unsigned int count);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__ignoreKeyRanges(brlapi_handle_t* handle,
+                                           const brlapi_range_t ranges[],
+                                           unsigned int count);
+
+/* brlapi_acceptKeyRanges */
+/** Accept some key presses from the braille keyboard
+ *
+ * This function asks the server to return the provided key ranges (inclusive)
+ * to the application, and not give them to \e brltty.
+ *
+ * \param ranges key ranges, which are inclusive
+ * \param count number of ranges
+ *
+ * \note The given codes should be raw keycodes (i.e. some driver name was given
+ * to brlapi_enterTtyMode()) */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_acceptKeyRanges(const brlapi_range_t ranges[],
+                                          unsigned int count);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__acceptKeyRanges(brlapi_handle_t* handle,
+                                           const brlapi_range_t ranges[],
+                                           unsigned int count);
+/** @} */
+
+/** \defgroup brlapi_driverspecific Driver-Specific modes
+ * \brief Raw and Suspend Modes mechanism
+ *
+ * If the application wants to directly talk to the braille terminal, it should
+ * use Raw Mode. In this special mode, the driver gives the whole control of the
+ * terminal to it: \e brltty doesn't work any more.
+ *
+ * For this, it simply has to call brlapi_enterRawMode(), then brlapi_sendRaw()
+ * and brlapi_recvRaw(), and finally give control back thanks to
+ * brlapi_leaveRawMode().
+ *
+ * Special care of the terminal should be taken, since one might completely
+ * trash the terminal's data, or even lock it! The application should always
+ * check for terminal's type thanks to brlapi_getDriverName().
+ *
+ * The client can also make brltty close the driver by using
+ * brlapi_suspendDriver(), and resume it again with brlapi_resumeDriver().  This
+ * should not be used if possible: raw mode should be sufficient for any use. If
+ * not, please ask for features :)
+ *
+ * @{
+ */
+
+/* brlapi_enterRawMode */
+/** Switch to Raw mode
+ * \param driver Specifies the name of the driver for which the raw
+ * communication will be established.
+ * \return 0 on success, -1 on error */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_enterRawMode(const char* driver);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__enterRawMode(brlapi_handle_t* handle,
+                                        const char* driver);
+
+/* brlapi_leaveRawMode */
+/** Leave Raw mode
+ * \return 0 on success, -1 on error */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_leaveRawMode(void);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__leaveRawMode(brlapi_handle_t* handle);
+
+/* brlapi_sendRaw */
+/** Send Raw data
+ *
+ * \param buffer points on the data;
+ * \param size holds the packet size.
+ * \return size on success, -1 on error */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+ssize_t BRLAPI_STDCALL brlapi_sendRaw(const void* buffer, size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+ssize_t BRLAPI_STDCALL brlapi__sendRaw(brlapi_handle_t* handle,
+                                       const void* buffer,
+                                       size_t size);
+
+/* brlapi_recvRaw */
+/** Get Raw data
+ *
+ * \param buffer points on a buffer where the function will store the received
+ * data;
+ * \param size holds the buffer size.
+ * \return its size, -1 on error or signal interruption */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+ssize_t BRLAPI_STDCALL brlapi_recvRaw(void* buffer, size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+ssize_t BRLAPI_STDCALL brlapi__recvRaw(brlapi_handle_t* handle,
+                                       void* buffer,
+                                       size_t size);
+
+/* brlapi_suspendDriver */
+/** Suspend braille driver
+ * \param driver Specifies the name of the driver which will be suspended.
+ * \return -1 on error
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_suspendDriver(const char* driver);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__suspendDriver(brlapi_handle_t* handle,
+                                         const char* driver);
+
+/* brlapi_resumeDriver */
+/** Resume braille driver
+ * \return -1 on error
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_resumeDriver(void);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__resumeDriver(brlapi_handle_t* handle);
+/** @} */
+
+#include "brlapi_param.h"
+
+/** \defgroup brlapi_parameterManagement Parameter management
+ * \brief How to manage BrlAPI parameters
+ *
+ * There are several kinds of parameters:
+ * - states associated with the braille device itself, such as its size or
+ * parameters of the device port
+ * - states of the BrlAPI connection itself, such as the displaying level or
+ * key passing preferences.
+ * - general states such as the cut buffer,
+ * - braille parameters: braille table, contraction, cursor shape, etc,
+ * - browse parameters: line skip, beep, etc.
+ *
+ * Some of them are subdivided in subparameters.  Others have only subparameter
+ * 0.
+ *
+ * Some of them are read-only, others are read/write.
+ *
+ * A client can either request the immediate content of a parameter by
+ * using brlapi_getParameter(); set the content of a parameter by using
+ * brlapi_setParameter(); or register a callback that may be called immediately
+ * and on each change of a given parameter, by using brlapi_watchParameter().
+ *
+ * @{ */
+
+/** Flags for parameter requests */
+typedef uint32_t brlapi_param_flags_t;
+#define BRLAPI_PARAMF_LOCAL                                                  \
+  0X00 /**< Refer to the value local to the connection instead of the global \
+          value */
+#define BRLAPI_PARAMF_GLOBAL                                            \
+  0X01 /**< Refer to the global value instead of the value local to the \
+          connection */
+#define BRLAPI_PARAMF_SELF \
+  0X02 /**< Specify whether to receive notifications of value self-changes */
+
+/* brlapi_getParameter */
+/** Get the content of a parameter
+ *
+ * brlapi_getParameter gets the current content of a parameter
+ *
+ * \param parameter is the parameter whose content shall be gotten;
+ * \param subparam is a specific instance of the parameter;
+ * \param flags specify which value and how it should be returned;
+ * \param data is a buffer where content of the parameter shall be stored;
+ * \param len is the size of the buffer.
+ *
+ * \return the real size of the parameter's content. If the parameter does not
+ * fit in the provided buffer, it is truncated to len bytes (but the real size
+ * of the parameter is still returned). In that case, the client must call
+ * brlapi_getParameter again with a big enough buffer.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+ssize_t BRLAPI_STDCALL brlapi_getParameter(brlapi_param_t parameter,
+                                           brlapi_param_subparam_t subparam,
+                                           brlapi_param_flags_t flags,
+                                           void* data,
+                                           size_t len);
+#endif
+ssize_t BRLAPI_STDCALL brlapi__getParameter(brlapi_handle_t* handle,
+                                            brlapi_param_t parameter,
+                                            brlapi_param_subparam_t subparam,
+                                            brlapi_param_flags_t flags,
+                                            void* data,
+                                            size_t len);
+
+/* brlapi_getParameterAlloc */
+/** Return the content of a parameter
+ *
+ * brlapi_getParameterAlloc gets the current content of a parameter, by
+ * returning it as a newly-allocated buffer. The buffer is allocated to one byte
+ * more than the parameter value. This byte is set to zero. This allows, for
+ * string parameters, to be able to immediately use it as a C string.
+ *
+ * \param parameter is the parameter whose content shall be gotten;
+ * \param subparam is a specific instance of the parameter;
+ * \param flags specify which value and how it should be returned;
+ * \param len is the address where to store the size of the parameter value.
+ *
+ * \return a newly-allocated buffer that contains the value of the parameter.
+ * The caller must call free() on it after use. NULL is returned on errors
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void* BRLAPI_STDCALL brlapi_getParameterAlloc(brlapi_param_t parameter,
+                                              brlapi_param_subparam_t subparam,
+                                              brlapi_param_flags_t flags,
+                                              size_t* len);
+#endif
+void* BRLAPI_STDCALL brlapi__getParameterAlloc(brlapi_handle_t* handle,
+                                               brlapi_param_t parameter,
+                                               brlapi_param_subparam_t subparam,
+                                               brlapi_param_flags_t flags,
+                                               size_t* len);
+
+/* brlapi_setParameter */
+/** Set the content of a parameter
+ *
+ * brlapi_setParameter sets the content of a parameter
+ *
+ * \param parameter is the parameter to set;
+ * \param subparam is a specific instance of the parameter;
+ * \param flags specify which value and how it should be set;
+ * \param data is a buffer containing the data to store in the parameter;
+ * \param len is the size of the data.
+ *
+ * \return 0 on success, -1 on error (read-only parameter for instance).
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_setParameter(brlapi_param_t parameter,
+                                       brlapi_param_subparam_t subparam,
+                                       brlapi_param_flags_t flags,
+                                       const void* data,
+                                       size_t len);
+#endif
+int BRLAPI_STDCALL brlapi__setParameter(brlapi_handle_t* handle,
+                                        brlapi_param_t parameter,
+                                        brlapi_param_subparam_t subparam,
+                                        brlapi_param_flags_t flags,
+                                        const void* data,
+                                        size_t len);
+
+/* brlapi_paramCallback_t */
+/** Callback for parameter changes
+ *
+ * When a parameter gets changed, application-defined callbacks set by the
+ * brlapi_watchParameter() function are called.
+ *
+ * \param parameter is the parameter that changed;
+ * \param flags specify which value and how it was changed;
+ * \param priv is the void pointer that was passed to the brlapi_watchParameter
+ * call which registered the callback; \param data is a buffer containing the
+ * new value of the parameter; \param len is the size of the data.
+ *
+ * This callback only gets called when the application calls some brlapi_
+ * function (i.e. BrlAPI gets direct control of the execution).
+ */
+typedef void (*brlapi_paramCallback_t)(brlapi_param_t parameter,
+                                       brlapi_param_subparam_t subparam,
+                                       brlapi_param_flags_t flags,
+                                       void* priv,
+                                       const void* data,
+                                       size_t len);
+
+/* brlapi_paramCallbackDescriptor_t */
+/** Type for callback descriptors
+ * This is returned by brlapi_watchParameter, to be passed to
+ * brlapi_unwatchParameter.
+ */
+typedef void* brlapi_paramCallbackDescriptor_t;
+
+/* brlapi_watchParameter */
+/** Set a parameter change callback
+ *
+ * brlapi_watchParameter registers a parameter change callback: whenever the
+ * given parameter changes, the given function is called.
+ *
+ * \param parameter is the parameter to watch;
+ * \param subparam is a specific instance of the parameter;
+ * \param flags specify which value and how it should be monitored;
+ * \param func is the function to call on parameter change;
+ * \param priv is a void pointer which will be passed as such to the function;
+ * \param data is a buffer where the current content of the parameter shall be
+ * stored;
+ * \param len is the size of the buffer.
+ *
+ * \return the callback descriptor (to be passed to brlapi_unwatchParameter to
+ * unregister the callback), or NULL on error.
+ *
+ * \note Default parameter callbacks don't do anything, except the ones for
+ * display size which just raise SIGWINCH.
+ * \note If data is NULL, the callback will be called immediately by
+ * brlapi_watchParameter, for providing the initial value
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+brlapi_paramCallbackDescriptor_t BRLAPI_STDCALL
+brlapi_watchParameter(brlapi_param_t parameter,
+                      brlapi_param_subparam_t subparam,
+                      brlapi_param_flags_t flags,
+                      brlapi_paramCallback_t func,
+                      void* priv,
+                      void* data,
+                      size_t len);
+#endif
+brlapi_paramCallbackDescriptor_t BRLAPI_STDCALL
+brlapi__watchParameter(brlapi_handle_t* handle,
+                       brlapi_param_t parameter,
+                       brlapi_param_subparam_t subparam,
+                       brlapi_param_flags_t flags,
+                       brlapi_paramCallback_t func,
+                       void* priv,
+                       void* data,
+                       size_t len);
+
+/* brlapi_unwatchParameter */
+/** Clear a parameter change callback
+ *
+ * brlapi_unwatchParameter unregisters a parameter change callback: the
+ * callback function previously registered with brlapi_watchParameter will
+ * not be called any longer.
+ *
+ * \param descriptor refers to the callback to be removed.
+ *
+ * \return 0 on success, -1 on error.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL
+brlapi_unwatchParameter(brlapi_paramCallbackDescriptor_t descriptor);
+#endif
+int BRLAPI_STDCALL
+brlapi__unwatchParameter(brlapi_handle_t* handle,
+                         brlapi_paramCallbackDescriptor_t descriptor);
+
+/** @} */
+
+/** \defgroup brlapi_misc Miscellaneous functions
+ * @{ */
+
+/* brlapi_pause */
+/**
+ * Waits until an event is received from the BrlAPI server
+ * \param timeout_ms specifies an optional timeout which can be zero for
+ * polling, or -1 for infinite wait \return nothing
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void BRLAPI_STDCALL brlapi_pause(int timeout_ms);
+#endif
+void BRLAPI_STDCALL brlapi__pause(brlapi_handle_t* handle, int timeout_ms);
+
+/** @} */
+
+/** \defgroup brlapi_error Error handling
+ * \brief How to handle errors
+ *
+ * When a function fails, ::brlapi_errno will hold an error
+ * code to explain why it failed. It should always be reported somehow.
+ *
+ * Although most errors are reported that way, some (called exceptions)
+ * are reported asynchronously for efficiency reasons, because they always
+ * just report a programming error. The affected functions are: brlapi_setFocus,
+ * brlapi_write* and brlapi_sendRaw.  When they happen, the next call to
+ * brlapi_something will close the connection and call the \e exception
+ * handler. If the exception handler returns, the brlapi_something function will
+ * return an end-of-file error.
+ *
+ * The default exception handler (brlapi_defaultExceptionHandler()) dumps
+ * the guilty packet before abort()ing.  It can be replaced by calling
+ * brlapi_setExceptionHandler().  For instance, the Java and Python bindings use
+ * this for raising a Java or Python exception that may be caught.
+ *
+ * @{ */
+
+/* Error codes */
+#define BRLAPI_ERROR_SUCCESS 0 /**< Success */
+#define BRLAPI_ERROR_NOMEM 1   /**< Not enough memory */
+#define BRLAPI_ERROR_TTYBUSY \
+  2 /**< A connection is already running in this tty */
+#define BRLAPI_ERROR_DEVICEBUSY \
+  3 /**< A connection is already using RAW or suspend mode */
+#define BRLAPI_ERROR_UNKNOWN_INSTRUCTION 4 /**< Not implemented in protocol */
+#define BRLAPI_ERROR_ILLEGAL_INSTRUCTION 5 /**< Forbiden in current mode */
+#define BRLAPI_ERROR_INVALID_PARAMETER 6   /**< Out of range or have no sense */
+#define BRLAPI_ERROR_INVALID_PACKET 7      /**< Invalid size */
+#define BRLAPI_ERROR_CONNREFUSED 8         /**< Connection refused */
+#define BRLAPI_ERROR_OPNOTSUPP 9           /**< Operation not supported */
+#define BRLAPI_ERROR_GAIERR 10             /**< Getaddrinfo error */
+#define BRLAPI_ERROR_LIBCERR 11            /**< Libc error */
+#define BRLAPI_ERROR_UNKNOWNTTY 12 /**< Couldn't find out the tty number */
+#define BRLAPI_ERROR_PROTOCOL_VERSION 13 /**< Bad protocol version */
+#define BRLAPI_ERROR_EOF 14              /**< Unexpected end of file */
+#define BRLAPI_ERROR_EMPTYKEY 15         /**< Key file empty */
+#define BRLAPI_ERROR_DRIVERERROR              \
+  16 /**< Packet returned by driver too large \
+      */
+#define BRLAPI_ERROR_AUTHENTICATION 17 /**< Authentication failed */
+#define BRLAPI_ERROR_READONLY_PARAMETER \
+  18 /**< Parameter can not be changed  \
+      */
+
+/* brlapi_errlist */
+/** Error message list
+ *
+ * These are the string constants used by brlapi_perror().
+ */
+extern const char* brlapi_errlist[];
+
+/* brlapi_nerr */
+/** Number of error messages */
+extern const int brlapi_nerr;
+
+/* brlapi_perror */
+/** Print a BrlAPI error message
+ *
+ * brlapi_perror() reads ::brlapi_error, and acts just like perror().
+ */
+void BRLAPI_STDCALL brlapi_perror(const char* s);
+
+/* brlapi_error_t */
+/** All information that is needed to describe brlapi errors */
+typedef struct {
+  int brlerrno;
+  int libcerrno;
+  int gaierrno;
+  const char* errfun;
+} brlapi_error_t;
+
+/** Get per-thread error location
+ *
+ * In multithreaded software, ::brlapi_error is thread-specific, so api.h
+ * cheats about the brlapi_error token and actually calls
+ * brlapi_error_location().
+ *
+ * This gets the thread specific location of global variable ::brlapi_error
+ */
+brlapi_error_t* BRLAPI_STDCALL brlapi_error_location(void);
+
+/** Global variable brlapi_error
+ *
+ * ::brlapi_error is a global left-value containing the last error information.
+ * Its errno field is not reset to BRLAPI_ERROR_SUCCESS on success.
+ *
+ * This information may be copied in brlapi_error_t variables for later use
+ * with the brlapi_strerror function.
+ */
+extern brlapi_error_t brlapi_error;
+
+/** Shorthand for brlapi_error.errno */
+extern int brlapi_errno;
+/** Shorthand for brlapi_error.libcerrno */
+extern int brlapi_libcerrno;
+/** Shorthand for brlapi_error.gaierrno */
+extern int brlapi_gaierrno;
+/** Shorthand for brlapi_error.errfun */
+extern const char* brlapi_errfun;
+
+/** Cheat about the brlapi_error C token */
+#define brlapi_error (*brlapi_error_location())
+/** Cheat about the brlapi_errno C token */
+#define brlapi_errno (brlapi_error.brlerrno)
+/** Cheat about the brlapi_libcerrno C token */
+#define brlapi_libcerrno (brlapi_error.libcerrno)
+/** Cheat about the brlapi_gaierrno C token */
+#define brlapi_gaierrno (brlapi_error.gaierrno)
+/** Cheat about the brlapi_errfun C token */
+#define brlapi_errfun (brlapi_error.errfun)
+
+/* brlapi_strerror */
+/** Get plain error message
+ *
+ * brlapi_strerror() returns the plain error message corresponding to its
+ * argument.
+ */
+const char* BRLAPI_STDCALL brlapi_strerror(const brlapi_error_t* error);
+
+/** Type for packet type. Only unsigned can cross networks, 32bits */
+typedef uint32_t brlapi_packetType_t;
+
+/* brlapi_getPacketTypeName */
+/** Get plain packet type
+ *
+ * brlapi_getPacketTypeName() returns the plain packet type name corresponding
+ * to its argument.
+ */
+const char* BRLAPI_STDCALL brlapi_getPacketTypeName(brlapi_packetType_t type);
+
+/* brlapi_exceptionHandler_t */
+/** Types for exception handlers
+ *
+ * Types of exception handlers which are to be given to
+ * brlapi_setExceptionHandler() and brlapi__setExceptionHandler().
+ *
+ * \param handle is the handle corresponding to the guilty connection;
+ * \param error is a BRLAPI_ERROR_ error code;
+ * \param type is the type of the guilty packet;
+ * \param packet points to the content of the guilty packet (might be a little
+ * bit truncated); \param size gives the guilty packet's size.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+typedef void(BRLAPI_STDCALL* brlapi_exceptionHandler_t)(
+    int error,
+    brlapi_packetType_t type,
+    const void* packet,
+    size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+typedef void(BRLAPI_STDCALL* brlapi__exceptionHandler_t)(
+    brlapi_handle_t* handle,
+    int error,
+    brlapi_packetType_t type,
+    const void* packet,
+    size_t size);
+
+/* brlapi_strexception */
+/** Describes an exception
+ *
+ * brlapi_strexception() puts a text describing the given exception in buffer.
+ *
+ * The beginning of the guilty packet is dumped as a sequence of hex bytes.
+ *
+ * \return the size of the text describing the exception, following
+ * snprintf()'s semantics.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_strexception(char* buffer,
+                                       size_t bufferSize,
+                                       int error,
+                                       brlapi_packetType_t type,
+                                       const void* packet,
+                                       size_t packetSize);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__strexception(brlapi_handle_t* handle,
+                                        char* buffer,
+                                        size_t bufferSize,
+                                        int error,
+                                        brlapi_packetType_t type,
+                                        const void* packet,
+                                        size_t packetSize);
+
+/* brlapi_setExceptionHandler */
+/** Set a new exception handler
+ *
+ * brlapi_setExceptionHandler() replaces the previous exception handler with
+ * the handler parameter. The previous exception handler is returned to make
+ * chaining error handlers possible.
+ *
+ * The default handler just prints the exception and abort()s.
+ */
+#ifndef BRLAPI_NO_SINGLE_SESSION
+brlapi_exceptionHandler_t BRLAPI_STDCALL
+brlapi_setExceptionHandler(brlapi_exceptionHandler_t handler);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+brlapi__exceptionHandler_t BRLAPI_STDCALL
+brlapi__setExceptionHandler(brlapi_handle_t* handle,
+                            brlapi__exceptionHandler_t handler);
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+void BRLAPI_STDCALL brlapi_defaultExceptionHandler(int error,
+                                                   brlapi_packetType_t type,
+                                                   const void* packet,
+                                                   size_t size);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+void BRLAPI_STDCALL brlapi__defaultExceptionHandler(brlapi_handle_t* handle,
+                                                    int error,
+                                                    brlapi_packetType_t type,
+                                                    const void* packet,
+                                                    size_t size);
+
+/** @} */
+
+/* Windows-specific tricks - don't look at this */
+#ifdef BRLAPI_WIN32
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_writeTextWin(int cursor, const void* str, int wide);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__writeTextWin(brlapi_handle_t* handle,
+                                        int cursor,
+                                        const void* str,
+                                        int wide);
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+int BRLAPI_STDCALL brlapi_writeWin(const brlapi_writeArguments_t* s, int wide);
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+int BRLAPI_STDCALL brlapi__writeWin(brlapi_handle_t* handle,
+                                    const brlapi_writeArguments_t* s,
+                                    int wide);
+
+#ifdef UNICODE
+#ifndef BRLAPI_NO_SINGLE_SESSION
+#define brlapi_writeText(cursor, str) brlapi_writeTextWin(cursor, str, 1)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+#define brlapi__writeText(handle, cursor, str) \
+  brlapi__writeTextWin(handle, cursor, str, 1)
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+#define brlapi_write(s) brlapi_writeWin(s, 1)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+#define brlapi__write(handle, s) brlapi__writeWin(handle, s, 1)
+
+#else /* UNICODE */
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+#define brlapi_writeText(cursor, str) brlapi_writeTextWin(cursor, str, 0)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+#define brlapi__writeText(handle, cursor, str) \
+  brlapi__writeTextWin(handle, cursor, str, 0)
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+#define brlapi_write(s) brlapi_writeWin(s, 0)
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+#define brlapi__write(handle, s) brlapi__writeWin(handle, s, 0)
+
+#endif /* UNICODE */
+#endif /* BRLAPI_WIN32 */
+
+#ifndef BRLAPI_NO_DEPRECATED
+/** \defgroup brlapi_deprecated Deprecated names
+ *
+ * With version 0.5.0, BrlAPI is now provided through including <brlapi.h> and
+ * got a big renaming pass. Old names are still available through macros, but
+ * they are deprecated since they will get dropped in the next release. This
+ * documentation is for you to know the new names.
+ *
+ * For checking that you have completely switched to new names, just define
+ * BRLAPI_NO_DEPRECATED: that will disable compatibility macros.
+ *
+ * @{ */
+
+#define brlapi_settings_t brlapi_connectionSettings_t
+
+/** brlapi_writeStruct, replaced by brlapi_writeArguments_t */
+typedef struct {
+  int displayNumber;
+  unsigned int regionBegin;
+  unsigned int regionSize;
+  char* text;
+  int textSize;
+  unsigned char* attrAnd;
+  unsigned char* attrOr;
+  int cursor;
+  char* charset;
+} brlapi_writeStruct;
+#define BRLAPI_WRITESTRUCT_INITIALIZER BRLAPI_WRITEARGUMENTS_INITIALIZER
+
+#define brl_keycode_t brlapi_keyCode_t
+#define brl_type_t brlapi_packetType_t
+
+#define BRLCOMMANDS NULL
+#define BRL_KEYCODE_MAX BRLAPI_KEY_MAX
+
+#ifndef BRLAPI_NO_SINGLE_SESSION
+#define brlapi_initializeConnection brlapi_openConnection
+#define brlapi_getTty brlapi_enterTtyMode
+#define brlapi_getTtyPath brlapi_enterTtyModeWithPath
+#define brlapi_leaveTty brlapi_leaveTtyMode
+#define brlapi_unignoreKeyRange brlapi_acceptKeyRange
+#define brlapi_unignoreKeySet brlapi_acceptKeySet
+#define brlapi_getRaw brlapi_enterRawMode
+#define brlapi_leaveRaw brlapi_leaveRawMode
+#define brlapi_suspend brlapi_suspendDriver
+#define brlapi_resume brlapi_resumeDriver
+#endif /* BRLAPI_NO_SINGLE_SESSION */
+
+#define BRLERR_SUCCESS BRLAPI_ERROR_SUCCESS
+#define BRLERR_NOMEM BRLAPI_ERROR_NOMEM
+#define BRLERR_TTYBUSY BRLAPI_ERROR_TTYBUSY
+#define BRLERR_DEVICEBUSY BRLAPI_ERROR_DEVICEBUSY
+#define BRLERR_UNKNOWN_INSTRUCTION BRLAPI_ERROR_UNKNOWN_INSTRUCTION
+#define BRLERR_ILLEGAL_INSTRUCTION BRLAPI_ERROR_ILLEGAL_INSTRUCTION
+#define BRLERR_INVALID_PARAMETER BRLAPI_ERROR_INVALID_PARAMETER
+#define BRLERR_INVALID_PACKET BRLAPI_ERROR_INVALID_PACKET
+#define BRLERR_CONNREFUSED BRLAPI_ERROR_CONNREFUSED
+#define BRLERR_OPNOTSUPP BRLAPI_ERROR_OPNOTSUPP
+#define BRLERR_GAIERR BRLAPI_ERROR_GAIERR
+#define BRLERR_LIBCERR BRLAPI_ERROR_LIBCERR
+#define BRLERR_UNKNOWNTTY BRLAPI_ERROR_UNKNOWNTTY
+#define BRLERR_PROTOCOL_VERSION BRLAPI_ERROR_PROTOCOL_VERSION
+#define BRLERR_EOF BRLAPI_ERROR_EOF
+#define BRLERR_EMPTYKEY BRLAPI_ERROR_EMPTYKEY
+#define BRLERR_DRIVERERROR BRLAPI_ERROR_DRIVERERROR
+
+/** @} */
+#endif /* BRLAPI_NO_DEPRECATED */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED */
diff --git a/chromium/third_party/libbrlapi/brlapi_brldefs.h b/chromium/third_party/libbrlapi/brlapi_brldefs.h
new file mode 100644
index 00000000000..26b495ede4e
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi_brldefs.h
@@ -0,0 +1,454 @@
+/*
+ * BRLTTY - A background process providing access to the console screen (when in
+ *          text mode) for a blind person using a refreshable braille display.
+ *
+ * Copyright (C) 1995-2020 by The BRLTTY Developers.
+ *
+ * BRLTTY comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+#ifndef BRLAPI_INCLUDED_BRLDEFS
+#define BRLAPI_INCLUDED_BRLDEFS
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define BRL_FLG_PUT(fLG) BRLAPI_KEY_FLG_PUT(fLG)
+/** do nothing */
+#define BRL_CMD_NOOP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NOOP)
+/** go up one line */
+#define BRL_CMD_LNUP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_LNUP)
+/** go down one line */
+#define BRL_CMD_LNDN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_LNDN)
+/** go up several lines */
+#define BRL_CMD_WINUP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_WINUP)
+/** go down several lines */
+#define BRL_CMD_WINDN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_WINDN)
+/** go up to nearest line with different content */
+#define BRL_CMD_PRDIFLN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRDIFLN)
+/** go down to nearest line with different content */
+#define BRL_CMD_NXDIFLN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXDIFLN)
+/** go up to nearest line with different highlighting */
+#define BRL_CMD_ATTRUP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ATTRUP)
+/** go down to nearest line with different highlighting */
+#define BRL_CMD_ATTRDN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ATTRDN)
+/** go to top line */
+#define BRL_CMD_TOP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TOP)
+/** go to bottom line */
+#define BRL_CMD_BOT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BOT)
+/** go to beginning of top line */
+#define BRL_CMD_TOP_LEFT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TOP_LEFT)
+/** go to beginning of bottom line */
+#define BRL_CMD_BOT_LEFT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BOT_LEFT)
+/** go up to first line of paragraph */
+#define BRL_CMD_PRPGRPH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRPGRPH)
+/** go down to first line of next paragraph */
+#define BRL_CMD_NXPGRPH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXPGRPH)
+/** go up to previous command prompt */
+#define BRL_CMD_PRPROMPT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRPROMPT)
+/** go down to next command prompt */
+#define BRL_CMD_NXPROMPT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXPROMPT)
+/** search backward for clipboard text */
+#define BRL_CMD_PRSEARCH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRSEARCH)
+/** search forward for clipboard text */
+#define BRL_CMD_NXSEARCH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXSEARCH)
+/** go left one character */
+#define BRL_CMD_CHRLT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CHRLT)
+/** go right one character */
+#define BRL_CMD_CHRRT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CHRRT)
+/** go left half a braille window */
+#define BRL_CMD_HWINLT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_HWINLT)
+/** go right half a braille window */
+#define BRL_CMD_HWINRT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_HWINRT)
+/** go backward one braille window */
+#define BRL_CMD_FWINLT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_FWINLT)
+/** go forward one braille window */
+#define BRL_CMD_FWINRT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_FWINRT)
+/** go backward skipping blank braille windows */
+#define BRL_CMD_FWINLTSKIP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_FWINLTSKIP)
+/** go forward skipping blank braille windows */
+#define BRL_CMD_FWINRTSKIP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_FWINRTSKIP)
+/** go to beginning of line */
+#define BRL_CMD_LNBEG (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_LNBEG)
+/** go to end of line */
+#define BRL_CMD_LNEND (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_LNEND)
+/** go to screen cursor */
+#define BRL_CMD_HOME (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_HOME)
+/** go back after cursor tracking */
+#define BRL_CMD_BACK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BACK)
+/** go to screen cursor or go back after cursor tracking */
+#define BRL_CMD_RETURN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_RETURN)
+/** set screen image frozen/unfrozen */
+#define BRL_CMD_FREEZE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_FREEZE)
+/** set display mode attributes/text */
+#define BRL_CMD_DISPMD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_DISPMD)
+/** set text style 6-dot/8-dot */
+#define BRL_CMD_SIXDOTS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SIXDOTS)
+/** set sliding braille window on/off */
+#define BRL_CMD_SLIDEWIN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SLIDEWIN)
+/** set skipping of lines with identical content on/off */
+#define BRL_CMD_SKPIDLNS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SKPIDLNS)
+/** set skipping of blank braille windows on/off */
+#define BRL_CMD_SKPBLNKWINS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SKPBLNKWINS)
+/** set screen cursor visibility on/off */
+#define BRL_CMD_CSRVIS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRVIS)
+/** set hidden screen cursor on/off */
+#define BRL_CMD_CSRHIDE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRHIDE)
+/** set track screen cursor on/off */
+#define BRL_CMD_CSRTRK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRTRK)
+/** set screen cursor style block/underline */
+#define BRL_CMD_CSRSIZE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRSIZE)
+/** set screen cursor blinking on/off */
+#define BRL_CMD_CSRBLINK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRBLINK)
+/** set attribute underlining on/off */
+#define BRL_CMD_ATTRVIS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ATTRVIS)
+/** set attribute blinking on/off */
+#define BRL_CMD_ATTRBLINK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ATTRBLINK)
+/** set capital letter blinking on/off */
+#define BRL_CMD_CAPBLINK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CAPBLINK)
+/** set alert tunes on/off */
+#define BRL_CMD_TUNES (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TUNES)
+/** set autorepeat on/off */
+#define BRL_CMD_AUTOREPEAT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_AUTOREPEAT)
+/** set autospeak on/off */
+#define BRL_CMD_AUTOSPEAK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_AUTOSPEAK)
+/** enter/leave help display */
+#define BRL_CMD_HELP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_HELP)
+/** enter/leave status display */
+#define BRL_CMD_INFO (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_INFO)
+/** enter/leave command learn mode */
+#define BRL_CMD_LEARN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_LEARN)
+/** enter/leave preferences menu */
+#define BRL_CMD_PREFMENU (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PREFMENU)
+/** save preferences to disk */
+#define BRL_CMD_PREFSAVE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PREFSAVE)
+/** restore preferences from disk */
+#define BRL_CMD_PREFLOAD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PREFLOAD)
+/** go up to first item */
+#define BRL_CMD_MENU_FIRST_ITEM (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_FIRST_ITEM)
+/** go down to last item */
+#define BRL_CMD_MENU_LAST_ITEM (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_LAST_ITEM)
+/** go up to previous item */
+#define BRL_CMD_MENU_PREV_ITEM (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_PREV_ITEM)
+/** go down to next item */
+#define BRL_CMD_MENU_NEXT_ITEM (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_NEXT_ITEM)
+/** select previous choice */
+#define BRL_CMD_MENU_PREV_SETTING (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_PREV_SETTING)
+/** select next choice */
+#define BRL_CMD_MENU_NEXT_SETTING (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_NEXT_SETTING)
+/** stop speaking */
+#define BRL_CMD_MUTE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MUTE)
+/** go to current speaking position */
+#define BRL_CMD_SPKHOME (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPKHOME)
+/** speak current line */
+#define BRL_CMD_SAY_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_LINE)
+/** speak from top of screen through current line */
+#define BRL_CMD_SAY_ABOVE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_ABOVE)
+/** speak from current line through bottom of screen */
+#define BRL_CMD_SAY_BELOW (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_BELOW)
+/** decrease speaking rate */
+#define BRL_CMD_SAY_SLOWER (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_SLOWER)
+/** increase speaking rate */
+#define BRL_CMD_SAY_FASTER (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_FASTER)
+/** decrease speaking volume */
+#define BRL_CMD_SAY_SOFTER (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_SOFTER)
+/** increase speaking volume */
+#define BRL_CMD_SAY_LOUDER (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SAY_LOUDER)
+/** switch to the previous virtual terminal */
+#define BRL_CMD_SWITCHVT_PREV (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SWITCHVT_PREV)
+/** switch to the next virtual terminal */
+#define BRL_CMD_SWITCHVT_NEXT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SWITCHVT_NEXT)
+/** bring screen cursor to current line */
+#define BRL_CMD_CSRJMP_VERT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CSRJMP_VERT)
+/** insert clipboard text after screen cursor */
+#define BRL_CMD_PASTE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASTE)
+/** restart braille driver */
+#define BRL_CMD_RESTARTBRL (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_RESTARTBRL)
+/** restart speech driver */
+#define BRL_CMD_RESTARTSPEECH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_RESTARTSPEECH)
+/** braille display temporarily unavailable */
+#define BRL_CMD_OFFLINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_OFFLINE)
+/** cycle the Shift sticky input modifier (next, on, off) */
+#define BRL_CMD_SHIFT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SHIFT)
+/** cycle the Upper sticky input modifier (next, on, off) */
+#define BRL_CMD_UPPER (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_UPPER)
+/** cycle the Control sticky input modifier (next, on, off) */
+#define BRL_CMD_CONTROL (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CONTROL)
+/** cycle the Meta (Left Alt) sticky input modifier (next, on, off) */
+#define BRL_CMD_META (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_META)
+/** show current date and time */
+#define BRL_CMD_TIME (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TIME)
+/** go to previous menu level */
+#define BRL_CMD_MENU_PREV_LEVEL (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_MENU_PREV_LEVEL)
+/** set autospeak selected line on/off */
+#define BRL_CMD_ASPK_SEL_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_SEL_LINE)
+/** set autospeak selected character on/off */
+#define BRL_CMD_ASPK_SEL_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_SEL_CHAR)
+/** set autospeak inserted characters on/off */
+#define BRL_CMD_ASPK_INS_CHARS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_INS_CHARS)
+/** set autospeak deleted characters on/off */
+#define BRL_CMD_ASPK_DEL_CHARS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_DEL_CHARS)
+/** set autospeak replaced characters on/off */
+#define BRL_CMD_ASPK_REP_CHARS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_REP_CHARS)
+/** set autospeak completed words on/off */
+#define BRL_CMD_ASPK_CMP_WORDS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_CMP_WORDS)
+/** speak current character */
+#define BRL_CMD_SPEAK_CURR_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_CURR_CHAR)
+/** go to and speak previous character */
+#define BRL_CMD_SPEAK_PREV_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_PREV_CHAR)
+/** go to and speak next character */
+#define BRL_CMD_SPEAK_NEXT_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_NEXT_CHAR)
+/** speak current word */
+#define BRL_CMD_SPEAK_CURR_WORD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_CURR_WORD)
+/** go to and speak previous word */
+#define BRL_CMD_SPEAK_PREV_WORD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_PREV_WORD)
+/** go to and speak next word */
+#define BRL_CMD_SPEAK_NEXT_WORD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_NEXT_WORD)
+/** speak current line */
+#define BRL_CMD_SPEAK_CURR_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_CURR_LINE)
+/** go to and speak previous line */
+#define BRL_CMD_SPEAK_PREV_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_PREV_LINE)
+/** go to and speak next line */
+#define BRL_CMD_SPEAK_NEXT_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_NEXT_LINE)
+/** go to and speak first non-blank character on line */
+#define BRL_CMD_SPEAK_FRST_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_FRST_CHAR)
+/** go to and speak last non-blank character on line */
+#define BRL_CMD_SPEAK_LAST_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_LAST_CHAR)
+/** go to and speak first non-blank line on screen */
+#define BRL_CMD_SPEAK_FRST_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_FRST_LINE)
+/** go to and speak last non-blank line on screen */
+#define BRL_CMD_SPEAK_LAST_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_LAST_LINE)
+/** describe current character */
+#define BRL_CMD_DESC_CURR_CHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_DESC_CURR_CHAR)
+/** spell current word */
+#define BRL_CMD_SPELL_CURR_WORD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPELL_CURR_WORD)
+/** bring screen cursor to speech cursor */
+#define BRL_CMD_ROUTE_CURR_LOCN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ROUTE_CURR_LOCN)
+/** speak speech cursor location */
+#define BRL_CMD_SPEAK_CURR_LOCN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_CURR_LOCN)
+/** set speech cursor visibility on/off */
+#define BRL_CMD_SHOW_CURR_LOCN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SHOW_CURR_LOCN)
+/** save clipboard to disk */
+#define BRL_CMD_CLIP_SAVE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_SAVE)
+/** restore clipboard from disk */
+#define BRL_CMD_CLIP_RESTORE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_RESTORE)
+/** set braille typing mode dots/text */
+#define BRL_CMD_BRLUCDOTS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BRLUCDOTS)
+/** set braille keyboard enabled/disabled */
+#define BRL_CMD_BRLKBD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BRLKBD)
+/** clear all sticky input modifiers */
+#define BRL_CMD_UNSTICK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_UNSTICK)
+/** cycle the AltGr (Right Alt) sticky input modifier (next, on, off) */
+#define BRL_CMD_ALTGR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ALTGR)
+/** cycle the GUI (Windows) sticky input modifier (next, on, off) */
+#define BRL_CMD_GUI (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_GUI)
+/** stop the braille driver */
+#define BRL_CMD_BRL_STOP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BRL_STOP)
+/** start the braille driver */
+#define BRL_CMD_BRL_START (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_BRL_START)
+/** stop the speech driver */
+#define BRL_CMD_SPK_STOP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPK_STOP)
+/** start the speech driver */
+#define BRL_CMD_SPK_START (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPK_START)
+/** stop the screen driver */
+#define BRL_CMD_SCR_STOP (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SCR_STOP)
+/** start the screen driver */
+#define BRL_CMD_SCR_START (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SCR_START)
+/** bind to the previous virtual terminal */
+#define BRL_CMD_SELECTVT_PREV (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SELECTVT_PREV)
+/** bind to the next virtual terminal */
+#define BRL_CMD_SELECTVT_NEXT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SELECTVT_NEXT)
+/** go backward to nearest non-blank braille window */
+#define BRL_CMD_PRNBWIN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRNBWIN)
+/** go forward to nearest non-blank braille window */
+#define BRL_CMD_NXNBWIN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXNBWIN)
+/** set touch navigation on/off */
+#define BRL_CMD_TOUCH_NAV (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TOUCH_NAV)
+/** speak indent of current line */
+#define BRL_CMD_SPEAK_INDENT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SPEAK_INDENT)
+/** set autospeak indent of current line on/off */
+#define BRL_CMD_ASPK_INDENT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ASPK_INDENT)
+/** refresh braille display */
+#define BRL_CMD_REFRESH (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_REFRESH)
+/** bring screen cursor to character */
+#define BRL_BLK_ROUTE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ROUTE)
+/** start new clipboard at character */
+#define BRL_BLK_CLIP_NEW (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_NEW)
+/** deprecated definition of CLIP_NEW - start new clipboard at character */
+#define BRL_BLK_CUTBEGIN (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CUTBEGIN)
+/** append to clipboard from character */
+#define BRL_BLK_CLIP_ADD (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_ADD)
+/** deprecated definition of CLIP_ADD - append to clipboard from character */
+#define BRL_BLK_CUTAPPEND (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CUTAPPEND)
+/** rectangular copy to character */
+#define BRL_BLK_COPY_RECT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_COPY_RECT)
+/** deprecated definition of COPY_RECT - rectangular copy to character */
+#define BRL_BLK_CUTRECT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CUTRECT)
+/** linear copy to character */
+#define BRL_BLK_COPY_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_COPY_LINE)
+/** deprecated definition of COPY_LINE - linear copy to character */
+#define BRL_BLK_CUTLINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CUTLINE)
+/** switch to specific virtual terminal */
+#define BRL_BLK_SWITCHVT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SWITCHVT)
+/** go up to nearest line with less indent than character */
+#define BRL_BLK_PRINDENT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRINDENT)
+/** go down to nearest line with less indent than character */
+#define BRL_BLK_NXINDENT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXINDENT)
+/** describe character */
+#define BRL_BLK_DESCCHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_DESCCHAR)
+/** place left end of braille window at character */
+#define BRL_BLK_SETLEFT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SETLEFT)
+/** remember current braille window position */
+#define BRL_BLK_SETMARK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SETMARK)
+/** go to remembered braille window position */
+#define BRL_BLK_GOTOMARK (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_GOTOMARK)
+/** go to selected line */
+#define BRL_BLK_GOTOLINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_GOTOLINE)
+/** go up to nearest line with different character */
+#define BRL_BLK_PRDIFCHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PRDIFCHAR)
+/** go down to nearest line with different character */
+#define BRL_BLK_NXDIFCHAR (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_NXDIFCHAR)
+/** copy characters to clipboard */
+#define BRL_BLK_CLIP_COPY (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_COPY)
+/** deprecated definition of CLIP_COPY - copy characters to clipboard */
+#define BRL_BLK_COPYCHARS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_COPYCHARS)
+/** append characters to clipboard */
+#define BRL_BLK_CLIP_APPEND (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CLIP_APPEND)
+/** deprecated definition of CLIP_APPEND - append characters to clipboard */
+#define BRL_BLK_APNDCHARS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_APNDCHARS)
+/** insert clipboard history entry after screen cursor */
+#define BRL_BLK_PASTE_HISTORY (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASTE_HISTORY)
+/** set text table */
+#define BRL_BLK_SET_TEXT_TABLE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SET_TEXT_TABLE)
+/** set attributes table */
+#define BRL_BLK_SET_ATTRIBUTES_TABLE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SET_ATTRIBUTES_TABLE)
+/** set contraction table */
+#define BRL_BLK_SET_CONTRACTION_TABLE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SET_CONTRACTION_TABLE)
+/** set keyboard table */
+#define BRL_BLK_SET_KEYBOARD_TABLE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SET_KEYBOARD_TABLE)
+/** set language profile */
+#define BRL_BLK_SET_LANGUAGE_PROFILE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SET_LANGUAGE_PROFILE)
+/** bring screen cursor to line */
+#define BRL_BLK_ROUTE_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ROUTE_LINE)
+/** refresh braille line */
+#define BRL_BLK_REFRESH_LINE (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_REFRESH_LINE)
+/** bind to specific virtual terminal */
+#define BRL_BLK_SELECTVT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_SELECTVT)
+/** render an alert */
+#define BRL_BLK_ALERT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_ALERT)
+/** type unicode character */
+#define BRL_KEY_PASSCHAR (BRLAPI_KEY_TYPE_SYM | 0X0000)
+/** type braille dots */
+#define BRL_BLK_PASSDOTS (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASSDOTS)
+/** AT (set 2) keyboard scan code */
+#define BRL_BLK_PASSAT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASSAT)
+/** XT (set 1) keyboard scan code */
+#define BRL_BLK_PASSXT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASSXT)
+/** PS/2 (set 3) keyboard scan code */
+#define BRL_BLK_PASSPS2 (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_PASSPS2)
+/** switch to command context */
+#define BRL_BLK_CONTEXT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_CONTEXT)
+/** current reading location */
+#define BRL_BLK_TOUCH_AT (BRLAPI_KEY_TYPE_CMD | BRLAPI_KEY_CMD_TOUCH_AT)
+/** enter key */
+#define BRL_KEY_ENTER (BRLAPI_KEY_SYM_LINEFEED & 0XFF)
+/** tab key */
+#define BRL_KEY_TAB (BRLAPI_KEY_SYM_TAB & 0XFF)
+/** backspace key */
+#define BRL_KEY_BACKSPACE (BRLAPI_KEY_SYM_BACKSPACE & 0XFF)
+/** escape key */
+#define BRL_KEY_ESCAPE (BRLAPI_KEY_SYM_ESCAPE & 0XFF)
+/** cursor-left key */
+#define BRL_KEY_CURSOR_LEFT (BRLAPI_KEY_SYM_LEFT & 0XFF)
+/** cursor-right key */
+#define BRL_KEY_CURSOR_RIGHT (BRLAPI_KEY_SYM_RIGHT & 0XFF)
+/** cursor-up key */
+#define BRL_KEY_CURSOR_UP (BRLAPI_KEY_SYM_UP & 0XFF)
+/** cursor-down key */
+#define BRL_KEY_CURSOR_DOWN (BRLAPI_KEY_SYM_DOWN & 0XFF)
+/** page-up key */
+#define BRL_KEY_PAGE_UP (BRLAPI_KEY_SYM_PAGE_UP & 0XFF)
+/** page-down key */
+#define BRL_KEY_PAGE_DOWN (BRLAPI_KEY_SYM_PAGE_DOWN & 0XFF)
+/** home key */
+#define BRL_KEY_HOME (BRLAPI_KEY_SYM_HOME & 0XFF)
+/** end key */
+#define BRL_KEY_END (BRLAPI_KEY_SYM_END & 0XFF)
+/** insert key */
+#define BRL_KEY_INSERT (BRLAPI_KEY_SYM_INSERT & 0XFF)
+/** delete key */
+#define BRL_KEY_DELETE (BRLAPI_KEY_SYM_DELETE & 0XFF)
+/** function key */
+#define BRL_KEY_FUNCTION (BRLAPI_KEY_SYM_FUNCTION & 0XFF)
+/** enable feature */
+#define BRL_FLG_TOGGLE_ON BRLAPI_KEY_FLG_TOGGLE_ON
+/** disable feature */
+#define BRL_FLG_TOGGLE_OFF BRLAPI_KEY_FLG_TOGGLE_OFF
+/** mask for all toggle flags */
+#define BRL_FLG_TOGGLE_MASK BRLAPI_KEY_FLG_TOGGLE_MASK
+/** bring screen cursor into braille window after function */
+#define BRL_FLG_MOTION_ROUTE BRLAPI_KEY_FLG_MOTION_ROUTE
+/** scale arg=0X00-0XFF to screen height */
+#define BRL_FLG_MOTION_SCALED BRLAPI_KEY_FLG_MOTION_SCALED
+/** go to beginning of line */
+#define BRL_FLG_MOTION_TOLEFT BRLAPI_KEY_FLG_MOTION_TOLEFT
+/** shift key pressed */
+#define BRL_FLG_INPUT_SHIFT BRLAPI_KEY_FLG_INPUT_SHIFT
+/** convert to uppercase */
+#define BRL_FLG_INPUT_UPPER BRLAPI_KEY_FLG_INPUT_UPPER
+/** control key pressed */
+#define BRL_FLG_INPUT_CONTROL BRLAPI_KEY_FLG_INPUT_CONTROL
+/** meta (left alt) key pressed */
+#define BRL_FLG_INPUT_META BRLAPI_KEY_FLG_INPUT_META
+/** altgr (right alt) key pressed */
+#define BRL_FLG_INPUT_ALTGR BRLAPI_KEY_FLG_INPUT_ALTGR
+/** gui (windows) key pressed */
+#define BRL_FLG_INPUT_GUI BRLAPI_KEY_FLG_INPUT_GUI
+/** it is a release scan code */
+#define BRL_FLG_KBD_RELEASE BRLAPI_KEY_FLG_KBD_RELEASE
+/** it is an emulation 0 scan code */
+#define BRL_FLG_KBD_EMUL0 BRLAPI_KEY_FLG_KBD_EMUL0
+/** it is an emulation 1 scan code */
+#define BRL_FLG_KBD_EMUL1 BRLAPI_KEY_FLG_KBD_EMUL1
+/** upper-left dot of standard braille cell */
+#define BRL_DOT1 BRLAPI_DOT1
+/** middle-left dot of standard braille cell */
+#define BRL_DOT2 BRLAPI_DOT2
+/** lower-left dot of standard braille cell */
+#define BRL_DOT3 BRLAPI_DOT3
+/** upper-right dot of standard braille cell */
+#define BRL_DOT4 BRLAPI_DOT4
+/** middle-right dot of standard braille cell */
+#define BRL_DOT5 BRLAPI_DOT5
+/** lower-right dot of standard braille cell */
+#define BRL_DOT6 BRLAPI_DOT6
+/** lower-left dot of computer braille cell */
+#define BRL_DOT7 BRLAPI_DOT7
+/** lower-right dot of computer braille cell */
+#define BRL_DOT8 BRLAPI_DOT8
+/** chord (space bar on braille keyboard) */
+#define BRL_DOTC BRLAPI_DOTC
+/** mask for command type */
+#define BRL_MSK_BLK (BRLAPI_KEY_TYPE_MASK | BRLAPI_KEY_CMD_BLK_MASK)
+/** mask for command value/argument */
+#define BRL_MSK_ARG BRLAPI_KEY_CMD_ARG_MASK
+/** mask for command flags */
+#define BRL_MSK_FLG BRLAPI_KEY_FLAGS_MASK
+/** mask for command */
+#define BRL_MSK_CMD (BRL_MSK_BLK | BRL_MSK_ARG)
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED_BRLDEFS */
diff --git a/chromium/third_party/libbrlapi/brlapi_constants.h b/chromium/third_party/libbrlapi/brlapi_constants.h
new file mode 100644
index 00000000000..978e454a498
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi_constants.h
@@ -0,0 +1,437 @@
+/*
+ * libbrlapi - A library providing access to braille terminals for applications.
+ *
+ * Copyright (C) 2002-2020 by
+ *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
+ *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
+ *
+ * libbrlapi comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+#ifndef BRLAPI_INCLUDED_CONSTANTS
+#define BRLAPI_INCLUDED_CONSTANTS
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** \file
+ */
+
+/** \ingroup brlapi_keycodes
+ * @{ */
+
+/** do nothing */
+#define BRLAPI_KEY_CMD_NOOP (BRLAPI_KEY_CMD(0) + 0)
+/** go up one line */
+#define BRLAPI_KEY_CMD_LNUP (BRLAPI_KEY_CMD(0) + 1)
+/** go down one line */
+#define BRLAPI_KEY_CMD_LNDN (BRLAPI_KEY_CMD(0) + 2)
+/** go up several lines */
+#define BRLAPI_KEY_CMD_WINUP (BRLAPI_KEY_CMD(0) + 3)
+/** go down several lines */
+#define BRLAPI_KEY_CMD_WINDN (BRLAPI_KEY_CMD(0) + 4)
+/** go up to nearest line with different content */
+#define BRLAPI_KEY_CMD_PRDIFLN (BRLAPI_KEY_CMD(0) + 5)
+/** go down to nearest line with different content */
+#define BRLAPI_KEY_CMD_NXDIFLN (BRLAPI_KEY_CMD(0) + 6)
+/** go up to nearest line with different highlighting */
+#define BRLAPI_KEY_CMD_ATTRUP (BRLAPI_KEY_CMD(0) + 7)
+/** go down to nearest line with different highlighting */
+#define BRLAPI_KEY_CMD_ATTRDN (BRLAPI_KEY_CMD(0) + 8)
+/** go to top line */
+#define BRLAPI_KEY_CMD_TOP (BRLAPI_KEY_CMD(0) + 9)
+/** go to bottom line */
+#define BRLAPI_KEY_CMD_BOT (BRLAPI_KEY_CMD(0) + 10)
+/** go to beginning of top line */
+#define BRLAPI_KEY_CMD_TOP_LEFT (BRLAPI_KEY_CMD(0) + 11)
+/** go to beginning of bottom line */
+#define BRLAPI_KEY_CMD_BOT_LEFT (BRLAPI_KEY_CMD(0) + 12)
+/** go up to first line of paragraph */
+#define BRLAPI_KEY_CMD_PRPGRPH (BRLAPI_KEY_CMD(0) + 13)
+/** go down to first line of next paragraph */
+#define BRLAPI_KEY_CMD_NXPGRPH (BRLAPI_KEY_CMD(0) + 14)
+/** go up to previous command prompt */
+#define BRLAPI_KEY_CMD_PRPROMPT (BRLAPI_KEY_CMD(0) + 15)
+/** go down to next command prompt */
+#define BRLAPI_KEY_CMD_NXPROMPT (BRLAPI_KEY_CMD(0) + 16)
+/** search backward for clipboard text */
+#define BRLAPI_KEY_CMD_PRSEARCH (BRLAPI_KEY_CMD(0) + 17)
+/** search forward for clipboard text */
+#define BRLAPI_KEY_CMD_NXSEARCH (BRLAPI_KEY_CMD(0) + 18)
+/** go left one character */
+#define BRLAPI_KEY_CMD_CHRLT (BRLAPI_KEY_CMD(0) + 19)
+/** go right one character */
+#define BRLAPI_KEY_CMD_CHRRT (BRLAPI_KEY_CMD(0) + 20)
+/** go left half a braille window */
+#define BRLAPI_KEY_CMD_HWINLT (BRLAPI_KEY_CMD(0) + 21)
+/** go right half a braille window */
+#define BRLAPI_KEY_CMD_HWINRT (BRLAPI_KEY_CMD(0) + 22)
+/** go backward one braille window */
+#define BRLAPI_KEY_CMD_FWINLT (BRLAPI_KEY_CMD(0) + 23)
+/** go forward one braille window */
+#define BRLAPI_KEY_CMD_FWINRT (BRLAPI_KEY_CMD(0) + 24)
+/** go backward skipping blank braille windows */
+#define BRLAPI_KEY_CMD_FWINLTSKIP (BRLAPI_KEY_CMD(0) + 25)
+/** go forward skipping blank braille windows */
+#define BRLAPI_KEY_CMD_FWINRTSKIP (BRLAPI_KEY_CMD(0) + 26)
+/** go to beginning of line */
+#define BRLAPI_KEY_CMD_LNBEG (BRLAPI_KEY_CMD(0) + 27)
+/** go to end of line */
+#define BRLAPI_KEY_CMD_LNEND (BRLAPI_KEY_CMD(0) + 28)
+/** go to screen cursor */
+#define BRLAPI_KEY_CMD_HOME (BRLAPI_KEY_CMD(0) + 29)
+/** go back after cursor tracking */
+#define BRLAPI_KEY_CMD_BACK (BRLAPI_KEY_CMD(0) + 30)
+/** go to screen cursor or go back after cursor tracking */
+#define BRLAPI_KEY_CMD_RETURN (BRLAPI_KEY_CMD(0) + 31)
+/** set screen image frozen/unfrozen */
+#define BRLAPI_KEY_CMD_FREEZE (BRLAPI_KEY_CMD(0) + 32)
+/** set display mode attributes/text */
+#define BRLAPI_KEY_CMD_DISPMD (BRLAPI_KEY_CMD(0) + 33)
+/** set text style 6-dot/8-dot */
+#define BRLAPI_KEY_CMD_SIXDOTS (BRLAPI_KEY_CMD(0) + 34)
+/** set sliding braille window on/off */
+#define BRLAPI_KEY_CMD_SLIDEWIN (BRLAPI_KEY_CMD(0) + 35)
+/** set skipping of lines with identical content on/off */
+#define BRLAPI_KEY_CMD_SKPIDLNS (BRLAPI_KEY_CMD(0) + 36)
+/** set skipping of blank braille windows on/off */
+#define BRLAPI_KEY_CMD_SKPBLNKWINS (BRLAPI_KEY_CMD(0) + 37)
+/** set screen cursor visibility on/off */
+#define BRLAPI_KEY_CMD_CSRVIS (BRLAPI_KEY_CMD(0) + 38)
+/** set hidden screen cursor on/off */
+#define BRLAPI_KEY_CMD_CSRHIDE (BRLAPI_KEY_CMD(0) + 39)
+/** set track screen cursor on/off */
+#define BRLAPI_KEY_CMD_CSRTRK (BRLAPI_KEY_CMD(0) + 40)
+/** set screen cursor style block/underline */
+#define BRLAPI_KEY_CMD_CSRSIZE (BRLAPI_KEY_CMD(0) + 41)
+/** set screen cursor blinking on/off */
+#define BRLAPI_KEY_CMD_CSRBLINK (BRLAPI_KEY_CMD(0) + 42)
+/** set attribute underlining on/off */
+#define BRLAPI_KEY_CMD_ATTRVIS (BRLAPI_KEY_CMD(0) + 43)
+/** set attribute blinking on/off */
+#define BRLAPI_KEY_CMD_ATTRBLINK (BRLAPI_KEY_CMD(0) + 44)
+/** set capital letter blinking on/off */
+#define BRLAPI_KEY_CMD_CAPBLINK (BRLAPI_KEY_CMD(0) + 45)
+/** set alert tunes on/off */
+#define BRLAPI_KEY_CMD_TUNES (BRLAPI_KEY_CMD(0) + 46)
+/** set autorepeat on/off */
+#define BRLAPI_KEY_CMD_AUTOREPEAT (BRLAPI_KEY_CMD(0) + 47)
+/** set autospeak on/off */
+#define BRLAPI_KEY_CMD_AUTOSPEAK (BRLAPI_KEY_CMD(0) + 48)
+/** enter/leave help display */
+#define BRLAPI_KEY_CMD_HELP (BRLAPI_KEY_CMD(0) + 49)
+/** enter/leave status display */
+#define BRLAPI_KEY_CMD_INFO (BRLAPI_KEY_CMD(0) + 50)
+/** enter/leave command learn mode */
+#define BRLAPI_KEY_CMD_LEARN (BRLAPI_KEY_CMD(0) + 51)
+/** enter/leave preferences menu */
+#define BRLAPI_KEY_CMD_PREFMENU (BRLAPI_KEY_CMD(0) + 52)
+/** save preferences to disk */
+#define BRLAPI_KEY_CMD_PREFSAVE (BRLAPI_KEY_CMD(0) + 53)
+/** restore preferences from disk */
+#define BRLAPI_KEY_CMD_PREFLOAD (BRLAPI_KEY_CMD(0) + 54)
+/** go up to first item */
+#define BRLAPI_KEY_CMD_MENU_FIRST_ITEM (BRLAPI_KEY_CMD(0) + 55)
+/** go down to last item */
+#define BRLAPI_KEY_CMD_MENU_LAST_ITEM (BRLAPI_KEY_CMD(0) + 56)
+/** go up to previous item */
+#define BRLAPI_KEY_CMD_MENU_PREV_ITEM (BRLAPI_KEY_CMD(0) + 57)
+/** go down to next item */
+#define BRLAPI_KEY_CMD_MENU_NEXT_ITEM (BRLAPI_KEY_CMD(0) + 58)
+/** select previous choice */
+#define BRLAPI_KEY_CMD_MENU_PREV_SETTING (BRLAPI_KEY_CMD(0) + 59)
+/** select next choice */
+#define BRLAPI_KEY_CMD_MENU_NEXT_SETTING (BRLAPI_KEY_CMD(0) + 60)
+/** stop speaking */
+#define BRLAPI_KEY_CMD_MUTE (BRLAPI_KEY_CMD(0) + 61)
+/** go to current speaking position */
+#define BRLAPI_KEY_CMD_SPKHOME (BRLAPI_KEY_CMD(0) + 62)
+/** speak current line */
+#define BRLAPI_KEY_CMD_SAY_LINE (BRLAPI_KEY_CMD(0) + 63)
+/** speak from top of screen through current line */
+#define BRLAPI_KEY_CMD_SAY_ABOVE (BRLAPI_KEY_CMD(0) + 64)
+/** speak from current line through bottom of screen */
+#define BRLAPI_KEY_CMD_SAY_BELOW (BRLAPI_KEY_CMD(0) + 65)
+/** decrease speaking rate */
+#define BRLAPI_KEY_CMD_SAY_SLOWER (BRLAPI_KEY_CMD(0) + 66)
+/** increase speaking rate */
+#define BRLAPI_KEY_CMD_SAY_FASTER (BRLAPI_KEY_CMD(0) + 67)
+/** decrease speaking volume */
+#define BRLAPI_KEY_CMD_SAY_SOFTER (BRLAPI_KEY_CMD(0) + 68)
+/** increase speaking volume */
+#define BRLAPI_KEY_CMD_SAY_LOUDER (BRLAPI_KEY_CMD(0) + 69)
+/** switch to the previous virtual terminal */
+#define BRLAPI_KEY_CMD_SWITCHVT_PREV (BRLAPI_KEY_CMD(0) + 70)
+/** switch to the next virtual terminal */
+#define BRLAPI_KEY_CMD_SWITCHVT_NEXT (BRLAPI_KEY_CMD(0) + 71)
+/** bring screen cursor to current line */
+#define BRLAPI_KEY_CMD_CSRJMP_VERT (BRLAPI_KEY_CMD(0) + 72)
+/** insert clipboard text after screen cursor */
+#define BRLAPI_KEY_CMD_PASTE (BRLAPI_KEY_CMD(0) + 73)
+/** restart braille driver */
+#define BRLAPI_KEY_CMD_RESTARTBRL (BRLAPI_KEY_CMD(0) + 74)
+/** restart speech driver */
+#define BRLAPI_KEY_CMD_RESTARTSPEECH (BRLAPI_KEY_CMD(0) + 75)
+/** braille display temporarily unavailable */
+#define BRLAPI_KEY_CMD_OFFLINE (BRLAPI_KEY_CMD(0) + 76)
+/** cycle the Shift sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_SHIFT (BRLAPI_KEY_CMD(0) + 77)
+/** cycle the Upper sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_UPPER (BRLAPI_KEY_CMD(0) + 78)
+/** cycle the Control sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_CONTROL (BRLAPI_KEY_CMD(0) + 79)
+/** cycle the Meta (Left Alt) sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_META (BRLAPI_KEY_CMD(0) + 80)
+/** show current date and time */
+#define BRLAPI_KEY_CMD_TIME (BRLAPI_KEY_CMD(0) + 81)
+/** go to previous menu level */
+#define BRLAPI_KEY_CMD_MENU_PREV_LEVEL (BRLAPI_KEY_CMD(0) + 82)
+/** set autospeak selected line on/off */
+#define BRLAPI_KEY_CMD_ASPK_SEL_LINE (BRLAPI_KEY_CMD(0) + 83)
+/** set autospeak selected character on/off */
+#define BRLAPI_KEY_CMD_ASPK_SEL_CHAR (BRLAPI_KEY_CMD(0) + 84)
+/** set autospeak inserted characters on/off */
+#define BRLAPI_KEY_CMD_ASPK_INS_CHARS (BRLAPI_KEY_CMD(0) + 85)
+/** set autospeak deleted characters on/off */
+#define BRLAPI_KEY_CMD_ASPK_DEL_CHARS (BRLAPI_KEY_CMD(0) + 86)
+/** set autospeak replaced characters on/off */
+#define BRLAPI_KEY_CMD_ASPK_REP_CHARS (BRLAPI_KEY_CMD(0) + 87)
+/** set autospeak completed words on/off */
+#define BRLAPI_KEY_CMD_ASPK_CMP_WORDS (BRLAPI_KEY_CMD(0) + 88)
+/** speak current character */
+#define BRLAPI_KEY_CMD_SPEAK_CURR_CHAR (BRLAPI_KEY_CMD(0) + 89)
+/** go to and speak previous character */
+#define BRLAPI_KEY_CMD_SPEAK_PREV_CHAR (BRLAPI_KEY_CMD(0) + 90)
+/** go to and speak next character */
+#define BRLAPI_KEY_CMD_SPEAK_NEXT_CHAR (BRLAPI_KEY_CMD(0) + 91)
+/** speak current word */
+#define BRLAPI_KEY_CMD_SPEAK_CURR_WORD (BRLAPI_KEY_CMD(0) + 92)
+/** go to and speak previous word */
+#define BRLAPI_KEY_CMD_SPEAK_PREV_WORD (BRLAPI_KEY_CMD(0) + 93)
+/** go to and speak next word */
+#define BRLAPI_KEY_CMD_SPEAK_NEXT_WORD (BRLAPI_KEY_CMD(0) + 94)
+/** speak current line */
+#define BRLAPI_KEY_CMD_SPEAK_CURR_LINE (BRLAPI_KEY_CMD(0) + 95)
+/** go to and speak previous line */
+#define BRLAPI_KEY_CMD_SPEAK_PREV_LINE (BRLAPI_KEY_CMD(0) + 96)
+/** go to and speak next line */
+#define BRLAPI_KEY_CMD_SPEAK_NEXT_LINE (BRLAPI_KEY_CMD(0) + 97)
+/** go to and speak first non-blank character on line */
+#define BRLAPI_KEY_CMD_SPEAK_FRST_CHAR (BRLAPI_KEY_CMD(0) + 98)
+/** go to and speak last non-blank character on line */
+#define BRLAPI_KEY_CMD_SPEAK_LAST_CHAR (BRLAPI_KEY_CMD(0) + 99)
+/** go to and speak first non-blank line on screen */
+#define BRLAPI_KEY_CMD_SPEAK_FRST_LINE (BRLAPI_KEY_CMD(0) + 100)
+/** go to and speak last non-blank line on screen */
+#define BRLAPI_KEY_CMD_SPEAK_LAST_LINE (BRLAPI_KEY_CMD(0) + 101)
+/** describe current character */
+#define BRLAPI_KEY_CMD_DESC_CURR_CHAR (BRLAPI_KEY_CMD(0) + 102)
+/** spell current word */
+#define BRLAPI_KEY_CMD_SPELL_CURR_WORD (BRLAPI_KEY_CMD(0) + 103)
+/** bring screen cursor to speech cursor */
+#define BRLAPI_KEY_CMD_ROUTE_CURR_LOCN (BRLAPI_KEY_CMD(0) + 104)
+/** speak speech cursor location */
+#define BRLAPI_KEY_CMD_SPEAK_CURR_LOCN (BRLAPI_KEY_CMD(0) + 105)
+/** set speech cursor visibility on/off */
+#define BRLAPI_KEY_CMD_SHOW_CURR_LOCN (BRLAPI_KEY_CMD(0) + 106)
+/** save clipboard to disk */
+#define BRLAPI_KEY_CMD_CLIP_SAVE (BRLAPI_KEY_CMD(0) + 107)
+/** restore clipboard from disk */
+#define BRLAPI_KEY_CMD_CLIP_RESTORE (BRLAPI_KEY_CMD(0) + 108)
+/** set braille typing mode dots/text */
+#define BRLAPI_KEY_CMD_BRLUCDOTS (BRLAPI_KEY_CMD(0) + 109)
+/** set braille keyboard enabled/disabled */
+#define BRLAPI_KEY_CMD_BRLKBD (BRLAPI_KEY_CMD(0) + 110)
+/** clear all sticky input modifiers */
+#define BRLAPI_KEY_CMD_UNSTICK (BRLAPI_KEY_CMD(0) + 111)
+/** cycle the AltGr (Right Alt) sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_ALTGR (BRLAPI_KEY_CMD(0) + 112)
+/** cycle the GUI (Windows) sticky input modifier (next, on, off) */
+#define BRLAPI_KEY_CMD_GUI (BRLAPI_KEY_CMD(0) + 113)
+/** stop the braille driver */
+#define BRLAPI_KEY_CMD_BRL_STOP (BRLAPI_KEY_CMD(0) + 114)
+/** start the braille driver */
+#define BRLAPI_KEY_CMD_BRL_START (BRLAPI_KEY_CMD(0) + 115)
+/** stop the speech driver */
+#define BRLAPI_KEY_CMD_SPK_STOP (BRLAPI_KEY_CMD(0) + 116)
+/** start the speech driver */
+#define BRLAPI_KEY_CMD_SPK_START (BRLAPI_KEY_CMD(0) + 117)
+/** stop the screen driver */
+#define BRLAPI_KEY_CMD_SCR_STOP (BRLAPI_KEY_CMD(0) + 118)
+/** start the screen driver */
+#define BRLAPI_KEY_CMD_SCR_START (BRLAPI_KEY_CMD(0) + 119)
+/** bind to the previous virtual terminal */
+#define BRLAPI_KEY_CMD_SELECTVT_PREV (BRLAPI_KEY_CMD(0) + 120)
+/** bind to the next virtual terminal */
+#define BRLAPI_KEY_CMD_SELECTVT_NEXT (BRLAPI_KEY_CMD(0) + 121)
+/** go backward to nearest non-blank braille window */
+#define BRLAPI_KEY_CMD_PRNBWIN (BRLAPI_KEY_CMD(0) + 122)
+/** go forward to nearest non-blank braille window */
+#define BRLAPI_KEY_CMD_NXNBWIN (BRLAPI_KEY_CMD(0) + 123)
+/** set touch navigation on/off */
+#define BRLAPI_KEY_CMD_TOUCH_NAV (BRLAPI_KEY_CMD(0) + 124)
+/** speak indent of current line */
+#define BRLAPI_KEY_CMD_SPEAK_INDENT (BRLAPI_KEY_CMD(0) + 125)
+/** set autospeak indent of current line on/off */
+#define BRLAPI_KEY_CMD_ASPK_INDENT (BRLAPI_KEY_CMD(0) + 126)
+/** refresh braille display */
+#define BRLAPI_KEY_CMD_REFRESH (BRLAPI_KEY_CMD(0) + 127)
+/** bring screen cursor to character */
+#define BRLAPI_KEY_CMD_ROUTE BRLAPI_KEY_CMD(1)
+/** start new clipboard at character */
+#define BRLAPI_KEY_CMD_CLIP_NEW BRLAPI_KEY_CMD(2)
+/** deprecated definition of CLIP_NEW - start new clipboard at character */
+#define BRLAPI_KEY_CMD_CUTBEGIN BRLAPI_KEY_CMD(2)
+/** append to clipboard from character */
+#define BRLAPI_KEY_CMD_CLIP_ADD BRLAPI_KEY_CMD(3)
+/** deprecated definition of CLIP_ADD - append to clipboard from character */
+#define BRLAPI_KEY_CMD_CUTAPPEND BRLAPI_KEY_CMD(3)
+/** rectangular copy to character */
+#define BRLAPI_KEY_CMD_COPY_RECT BRLAPI_KEY_CMD(4)
+/** deprecated definition of COPY_RECT - rectangular copy to character */
+#define BRLAPI_KEY_CMD_CUTRECT BRLAPI_KEY_CMD(4)
+/** linear copy to character */
+#define BRLAPI_KEY_CMD_COPY_LINE BRLAPI_KEY_CMD(5)
+/** deprecated definition of COPY_LINE - linear copy to character */
+#define BRLAPI_KEY_CMD_CUTLINE BRLAPI_KEY_CMD(5)
+/** switch to specific virtual terminal */
+#define BRLAPI_KEY_CMD_SWITCHVT BRLAPI_KEY_CMD(6)
+/** go up to nearest line with less indent than character */
+#define BRLAPI_KEY_CMD_PRINDENT BRLAPI_KEY_CMD(7)
+/** go down to nearest line with less indent than character */
+#define BRLAPI_KEY_CMD_NXINDENT BRLAPI_KEY_CMD(8)
+/** describe character */
+#define BRLAPI_KEY_CMD_DESCCHAR BRLAPI_KEY_CMD(9)
+/** place left end of braille window at character */
+#define BRLAPI_KEY_CMD_SETLEFT BRLAPI_KEY_CMD(10)
+/** remember current braille window position */
+#define BRLAPI_KEY_CMD_SETMARK BRLAPI_KEY_CMD(11)
+/** go to remembered braille window position */
+#define BRLAPI_KEY_CMD_GOTOMARK BRLAPI_KEY_CMD(12)
+/** go to selected line */
+#define BRLAPI_KEY_CMD_GOTOLINE BRLAPI_KEY_CMD(13)
+/** go up to nearest line with different character */
+#define BRLAPI_KEY_CMD_PRDIFCHAR BRLAPI_KEY_CMD(14)
+/** go down to nearest line with different character */
+#define BRLAPI_KEY_CMD_NXDIFCHAR BRLAPI_KEY_CMD(15)
+/** copy characters to clipboard */
+#define BRLAPI_KEY_CMD_CLIP_COPY BRLAPI_KEY_CMD(16)
+/** deprecated definition of CLIP_COPY - copy characters to clipboard */
+#define BRLAPI_KEY_CMD_COPYCHARS BRLAPI_KEY_CMD(16)
+/** append characters to clipboard */
+#define BRLAPI_KEY_CMD_CLIP_APPEND BRLAPI_KEY_CMD(17)
+/** deprecated definition of CLIP_APPEND - append characters to clipboard */
+#define BRLAPI_KEY_CMD_APNDCHARS BRLAPI_KEY_CMD(17)
+/** insert clipboard history entry after screen cursor */
+#define BRLAPI_KEY_CMD_PASTE_HISTORY BRLAPI_KEY_CMD(18)
+/** set text table */
+#define BRLAPI_KEY_CMD_SET_TEXT_TABLE BRLAPI_KEY_CMD(19)
+/** set attributes table */
+#define BRLAPI_KEY_CMD_SET_ATTRIBUTES_TABLE BRLAPI_KEY_CMD(20)
+/** set contraction table */
+#define BRLAPI_KEY_CMD_SET_CONTRACTION_TABLE BRLAPI_KEY_CMD(21)
+/** set keyboard table */
+#define BRLAPI_KEY_CMD_SET_KEYBOARD_TABLE BRLAPI_KEY_CMD(22)
+/** set language profile */
+#define BRLAPI_KEY_CMD_SET_LANGUAGE_PROFILE BRLAPI_KEY_CMD(23)
+/** bring screen cursor to line */
+#define BRLAPI_KEY_CMD_ROUTE_LINE BRLAPI_KEY_CMD(24)
+/** refresh braille line */
+#define BRLAPI_KEY_CMD_REFRESH_LINE BRLAPI_KEY_CMD(25)
+/** bind to specific virtual terminal */
+#define BRLAPI_KEY_CMD_SELECTVT BRLAPI_KEY_CMD(30)
+/** render an alert */
+#define BRLAPI_KEY_CMD_ALERT BRLAPI_KEY_CMD(31)
+/** type braille dots */
+#define BRLAPI_KEY_CMD_PASSDOTS BRLAPI_KEY_CMD(34)
+/** AT (set 2) keyboard scan code */
+#define BRLAPI_KEY_CMD_PASSAT BRLAPI_KEY_CMD(35)
+/** XT (set 1) keyboard scan code */
+#define BRLAPI_KEY_CMD_PASSXT BRLAPI_KEY_CMD(36)
+/** PS/2 (set 3) keyboard scan code */
+#define BRLAPI_KEY_CMD_PASSPS2 BRLAPI_KEY_CMD(37)
+/** switch to command context */
+#define BRLAPI_KEY_CMD_CONTEXT BRLAPI_KEY_CMD(38)
+/** current reading location */
+#define BRLAPI_KEY_CMD_TOUCH_AT BRLAPI_KEY_CMD(39)
+/** enable feature */
+#define BRLAPI_KEY_FLG_TOGGLE_ON BRLAPI_KEY_FLG(0X0100)
+/** disable feature */
+#define BRLAPI_KEY_FLG_TOGGLE_OFF BRLAPI_KEY_FLG(0X0200)
+/** mask for all toggle flags */
+#define BRLAPI_KEY_FLG_TOGGLE_MASK (BRLAPI_KEY_FLG_TOGGLE_ON | BRLAPI_KEY_FLG_TOGGLE_OFF)
+/** bring screen cursor into braille window after function */
+#define BRLAPI_KEY_FLG_MOTION_ROUTE BRLAPI_KEY_FLG(0X0400)
+/** scale arg=0X00-0XFF to screen height */
+#define BRLAPI_KEY_FLG_MOTION_SCALED BRLAPI_KEY_FLG(0X0800)
+/** go to beginning of line */
+#define BRLAPI_KEY_FLG_MOTION_TOLEFT BRLAPI_KEY_FLG(0X1000)
+/** shift key pressed */
+#define BRLAPI_KEY_FLG_SHIFT BRLAPI_KEY_FLG(0X01)
+/** convert to uppercase */
+#define BRLAPI_KEY_FLG_UPPER BRLAPI_KEY_FLG(0X02)
+/** control key pressed */
+#define BRLAPI_KEY_FLG_CONTROL BRLAPI_KEY_FLG(0X04)
+/** meta (left alt) key pressed */
+#define BRLAPI_KEY_FLG_META BRLAPI_KEY_FLG(0X08)
+/** altgr (right alt) key pressed */
+#define BRLAPI_KEY_FLG_ALTGR BRLAPI_KEY_FLG(0X10)
+/** gui (windows) key pressed */
+#define BRLAPI_KEY_FLG_GUI BRLAPI_KEY_FLG(0X20)
+/** it is a release scan code */
+#define BRLAPI_KEY_FLG_KBD_RELEASE BRLAPI_KEY_FLG(0X0100)
+/** it is an emulation 0 scan code */
+#define BRLAPI_KEY_FLG_KBD_EMUL0 BRLAPI_KEY_FLG(0X0200)
+/** it is an emulation 1 scan code */
+#define BRLAPI_KEY_FLG_KBD_EMUL1 BRLAPI_KEY_FLG(0X0400)
+/** upper-left dot of standard braille cell */
+#define BRLAPI_DOT1 1
+/** middle-left dot of standard braille cell */
+#define BRLAPI_DOT2 2
+/** lower-left dot of standard braille cell */
+#define BRLAPI_DOT3 4
+/** upper-right dot of standard braille cell */
+#define BRLAPI_DOT4 8
+/** middle-right dot of standard braille cell */
+#define BRLAPI_DOT5 16
+/** lower-right dot of standard braille cell */
+#define BRLAPI_DOT6 32
+/** lower-left dot of computer braille cell */
+#define BRLAPI_DOT7 64
+/** lower-right dot of computer braille cell */
+#define BRLAPI_DOT8 128
+/** chord (space bar on braille keyboard) */
+#define BRLAPI_DOTC 256
+
+/** Helper macro to easily produce braille patterns */
+#define BRLAPI_DOTS(dot1, dot2, dot3, dot4, dot5, dot6, dot7, dot8) (\
+  ((dot1)? BRLAPI_DOT1: 0) | \
+  ((dot2)? BRLAPI_DOT2: 0) | \
+  ((dot3)? BRLAPI_DOT3: 0) | \
+  ((dot4)? BRLAPI_DOT4: 0) | \
+  ((dot5)? BRLAPI_DOT5: 0) | \
+  ((dot6)? BRLAPI_DOT6: 0) | \
+  ((dot7)? BRLAPI_DOT7: 0) | \
+  ((dot8)? BRLAPI_DOT8: 0) \
+)
+
+/** space key */
+#define BRLAPI_DOT_CHORD 256
+/** @} */
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED_CONSTANTS */
diff --git a/chromium/third_party/libbrlapi/brlapi_keycodes.h b/chromium/third_party/libbrlapi/brlapi_keycodes.h
new file mode 100644
index 00000000000..c49c9585f58
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi_keycodes.h
@@ -0,0 +1,191 @@
+/*
+ * libbrlapi - A library providing access to braille terminals for applications.
+ *
+ * Copyright (C) 2002-2020 by
+ *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
+ *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
+ *
+ * libbrlapi comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+/** \file
+ */
+
+#ifndef BRLAPI_INCLUDED_KEYCODES
+#define BRLAPI_INCLUDED_KEYCODES
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** \defgroup brlapi_keycodes Types and Defines for \e BrlAPI Key Codes
+ *
+ * Key codes are unsigned 64 bit integers.  This 64-bit space is split into 3
+ * parts:
+ *
+ * - bits 63-32 (BRLAPI_KEY_FLAGS_MASK), flags: bits 39-32 are standard X
+ * modifiers (shift, control, meta, ...). Other flags are used for some commands,
+ * see documentation of BRLAPI_KEY_FLG_* for their respective uses.
+ * - bits 31-29 (BRLAPI_KEY_TYPE_MASK), key type: either BRLAPI_KEY_TYPE_CMD for
+ * braille commands, or BRLAPI_KEY_TYPE_SYM for standard X keysyms.
+ * - bits 28-0 (BRLAPI_KEY_CODE_MASK), key code: for braille commands, see
+ * BRLAPI_KEY_CMD_* ; for standard X keysyms, this is the keysym value, see
+ * X11 documentation, a complete list is probably available on your system in
+ * /usr/include/X11/keysymdef.h
+ *
+ * The third part is itself split into two parts: a command number and a command
+ * value.  The relative sizes of these parts vary according to the key type.
+ *
+ * For a braille command, bits 28-16 (BRLAPI_KEY_CMD_BLK_MASK) hold the braille
+ * command number, while bits 15-0 (BRLAPI_KEY_CMD_ARG_MASK) hold the command
+ * value.
+ *
+ * For a X keysym, if it is a unicode keysym (0x1uvwxyz), then the command
+ * number part is 0x1000000 and the value part is 0xuvwxyz. Else, the command
+ * part is held by bits 28-8 and the value part is held by bits 7-0. This
+ * permits to easily handle usual cases like 0x00xy (latin1), 0x01xy (latin2),
+ * XK_Backspace (0xff08, backspace), XK_Tab (0xff09, tab), ...
+ *
+ * For instance, if key == 0x0000000020010008,
+ * - (key & BRLAPI_KEY_TYPE_MASK) == BRLAPI_KEY_TYPE_CMD, so it's a braille
+ * command
+ * - (key & BRLAPI_KEY_CMD_BLK_MASK) == BRLAPI_KEY_CMD_ROUTE, so it's the
+ * braille route command.
+ * - (key & BRLAPI_KEY_CMD_ARG_MASK) == 8, so the highlighted cell is the 9th
+ * one (cells are numbered from 0)
+ * - (key & BRLAPI_KEY_FLAGS_MASK) == 0, so no modifier key was pressed during
+ * the command, and no particular flag applies to the command.
+ *
+ * if key == 0x000000010000FF09,
+ * - (key & BRLAPI_KEY_TYPE_MASK) == BRLAPI_KEY_TYPE_SYM, so it's a keysym
+ * - (key & BRLAPI_KEY_CODE_MASK) == XK_Tab, so it's the tab key.
+ * BRLAPI_KEY_SYM_TAB can also be used here, as well as a few other
+ * BRLAPI_KEY_SYM_* constants which are provided to avoid having to include
+ * X11/keysymdef.h
+ * - (key & BRLAPI_KEY_FLAGS_MASK) == BRLAPI_KEY_FLG_SHIFT, so the shift
+ * modifier was pressed during the command.
+ *
+ * in the X11 standard some keysyms are directly unicode, for instance if
+ * key == 0x0000000001001EA0,
+ * - (key & BRLAPI_KEY_TYPE_MASK) == BRLAPI_KEY_TYPE_SYM, so it's a keysym
+ * - (key & BRLAPI_KEY_SYM_UNICODE) != 0 so it's a unicode keysym, whose value
+ * is key & (BRLAPI_KEY_SYM_UNICODE-1).  Of course, one can also consider
+ * (key & BRLAPI_KEY_CODE_MASK) == XK_Abelowdot
+ * - (key & BRLAPI_KEY_FLAGS_MASK) == 0, so no modifier key was pressed during
+ * the command, and no particular flag applies to the command.
+ *
+ * The brlapi_expandKeyCode() function may be used for splitting key codes into
+ * these parts.
+ * @{
+ */
+typedef uint64_t brlapi_keyCode_t;
+
+/** Define a brlapi_keyCode_t constant */
+#define BRLAPI_KEYCODE_C(value) UINT64_C(value)
+
+/** Hexadecimal print format for brlapi_keyCode_t */
+#define BRLAPI_PRIxKEYCODE PRIx64
+
+/** Unsigned decimal print format for brlapi_keyCode_t */
+#define BRLAPI_PRIuKEYCODE PRIu64
+
+/** Brlapi_keyCode_t's biggest value
+ *
+ * As defined in \c <stdint.h> */
+#define BRLAPI_KEY_MAX UINT64_C(0XFFFFFFFFFFFFFFFF)
+
+/**
+ * Mask for flags of brlapi_keyCode_t
+ */
+#define BRLAPI_KEY_FLAGS_MASK		UINT64_C(0XFFFFFFFF00000000)
+/** Shift for flags of brlapi_keyCode_t */
+#define BRLAPI_KEY_FLAGS_SHIFT		32
+
+#define BRLAPI_KEY_FLG(v)		((brlapi_keyCode_t)(v) << BRLAPI_KEY_FLAGS_SHIFT)
+/** Standard X modifiers */
+/** Mod1 modifier (AKA meta) */
+#define BRLAPI_KEY_FLG_MOD1		BRLAPI_KEY_FLG(0x00000008)
+/** Mod2 modifier (usually numlock) */
+#define BRLAPI_KEY_FLG_MOD2		BRLAPI_KEY_FLG(0x00000010)
+/** Mod3 modifier */
+#define BRLAPI_KEY_FLG_MOD3		BRLAPI_KEY_FLG(0x00000020)
+/** Mod4 modifier */
+#define BRLAPI_KEY_FLG_MOD4		BRLAPI_KEY_FLG(0x00000040)
+/** Mod5 modifier (usually Alt-Gr) */
+#define BRLAPI_KEY_FLG_MOD5		BRLAPI_KEY_FLG(0x00000080)
+
+
+/**
+ * Mask for type of brlapi_keyCode_t
+ */
+#define BRLAPI_KEY_TYPE_MASK		UINT64_C(0X00000000E0000000)
+/** Shift for type of brlapi_keyCode_t */
+#define BRLAPI_KEY_TYPE_SHIFT		29
+/** Braille command brlapi_keyCode_t */
+#define BRLAPI_KEY_TYPE_CMD		UINT64_C(0X0000000020000000)
+/** X Keysym brlapi_keyCode_t */
+#define BRLAPI_KEY_TYPE_SYM		UINT64_C(0X0000000000000000)
+
+/**
+ * Mask for code of brlapi_keyCode_t
+ */
+#define BRLAPI_KEY_CODE_MASK		UINT64_C(0X000000001FFFFFFF)
+/** Shift for code of brlapi_keyCode_t */
+#define BRLAPI_KEY_CODE_SHIFT		0
+
+/** Mask for braille command type */
+#define BRLAPI_KEY_CMD_BLK_MASK		UINT64_C(0X1FFF0000)
+/** Shift for braille command type */
+#define BRLAPI_KEY_CMD_BLK_SHIFT	16
+/** Mask for braille command value */
+#define BRLAPI_KEY_CMD_ARG_MASK		UINT64_C(0X0000FFFF)
+/** Shift for braille command value */
+#define BRLAPI_KEY_CMD_ARG_SHIFT	0
+#define BRLAPI_KEY_CMD(v)		((v) << BRLAPI_KEY_CMD_BLK_SHIFT)
+
+/** Standard X keysyms */
+#define BRLAPI_KEY_SYM_BACKSPACE	UINT64_C(0X0000FF08)
+#define BRLAPI_KEY_SYM_TAB		UINT64_C(0X0000FF09)
+#define BRLAPI_KEY_SYM_LINEFEED		UINT64_C(0X0000FF0D)
+#define BRLAPI_KEY_SYM_ESCAPE		UINT64_C(0X0000FF1B)
+#define BRLAPI_KEY_SYM_HOME		UINT64_C(0X0000FF50)
+#define BRLAPI_KEY_SYM_LEFT		UINT64_C(0X0000FF51)
+#define BRLAPI_KEY_SYM_UP		UINT64_C(0X0000FF52)
+#define BRLAPI_KEY_SYM_RIGHT		UINT64_C(0X0000FF53)
+#define BRLAPI_KEY_SYM_DOWN		UINT64_C(0X0000FF54)
+#define BRLAPI_KEY_SYM_PAGE_UP		UINT64_C(0X0000FF55)
+#define BRLAPI_KEY_SYM_PAGE_DOWN	UINT64_C(0X0000FF56)
+#define BRLAPI_KEY_SYM_END		UINT64_C(0X0000FF57)
+#define BRLAPI_KEY_SYM_INSERT		UINT64_C(0X0000FF63)
+#define BRLAPI_KEY_SYM_FUNCTION		UINT64_C(0X0000FFBE)
+#define BRLAPI_KEY_SYM_DELETE		UINT64_C(0X0000FFFF)
+#define BRLAPI_KEY_SYM_UNICODE		UINT64_C(0X01000000)
+
+/**
+ * Flag for a raw keycode press vs release
+ *
+ * When brlapi_enterTtyMode() has been called with a driver name,
+ * brlapi_readKey() and brlapi_readKeyWithTimeout() will return
+ * driver-specific key codes except for the common BRLAPI_DRV_KEY_PRESS flag
+ * which indicates that it's a key press (as opposed to a release) event.
+ */
+#define BRLAPI_DRV_KEY_PRESS BRLAPI_KEYCODE_C(0X8000000000000000)
+
+/** @} */
+
+#include "brlapi_constants.h"
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED_KEYCODES */
diff --git a/chromium/third_party/libbrlapi/brlapi_param.h b/chromium/third_party/libbrlapi/brlapi_param.h
new file mode 100644
index 00000000000..141b38ef368
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi_param.h
@@ -0,0 +1,289 @@
+/*
+ * libbrlapi - A library providing access to braille terminals for applications.
+ *
+ * Copyright (C) 2002-2020 by
+ *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
+ *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
+ *
+ * libbrlapi comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+/** \file
+ */
+
+#ifndef BRLAPI_INCLUDED_PARAM
+#define BRLAPI_INCLUDED_PARAM
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "brlapi_keycodes.h"
+
+/** \ingroup brlapi_parameterManagement
+ *
+ * @{ */
+
+typedef enum {
+//Connection Parameters
+  BRLAPI_PARAM_SERVER_VERSION = 0,		/**< Version of the server: uint32_t */
+  BRLAPI_PARAM_CLIENT_PRIORITY = 1,		/**< Priority of the client: uint32_t (from 0 through 100, default is 50) */
+
+//Device Parameters
+  BRLAPI_PARAM_DRIVER_NAME = 2,			/**< Full name of the driver: string */
+  BRLAPI_PARAM_DRIVER_CODE = 3,			/**< Code (short name) of the driver: string */
+  BRLAPI_PARAM_DRIVER_VERSION = 4,		/**< Version of the driver: string */
+  BRLAPI_PARAM_DEVICE_MODEL = 5,		/**< Model of the device: string */
+  BRLAPI_PARAM_DEVICE_CELL_SIZE = 31,		/**< Number of dots in a cell: uint8_t */
+  BRLAPI_PARAM_DISPLAY_SIZE = 6,		/**< Dimensions of the braille display: { uint32_t columns; uint32_t rows; } */
+  BRLAPI_PARAM_DEVICE_IDENTIFIER = 7,		/**< Identifier of the device: string */
+  BRLAPI_PARAM_DEVICE_SPEED = 8,		/**< Speed of the device: uint32_t */
+  BRLAPI_PARAM_DEVICE_ONLINE = 9,		/**< Device is online: boolean */
+/* TODO: status area */
+
+//Input Parameters
+  BRLAPI_PARAM_RETAIN_DOTS = 10,		/**< Pass dot combinations (rather than characters): boolean */
+
+//Braille Rendering Parameters
+  BRLAPI_PARAM_COMPUTER_BRAILLE_CELL_SIZE = 11,	/**< Number of dots used to render a computer braille character: uint8_t (8 or 6) */
+  BRLAPI_PARAM_LITERARY_BRAILLE = 12,		/**< Whether braille is literary (rather than computer): boolean */
+  BRLAPI_PARAM_CURSOR_DOTS = 13,		/**< Representation of the cursor: uint8_t (ISO 11548-1) */
+  BRLAPI_PARAM_CURSOR_BLINK_PERIOD = 14,	/**< Blinking period of the cursor: uint32_t (milliseconds) */
+  BRLAPI_PARAM_CURSOR_BLINK_PERCENTAGE = 15,	/**< Portion of the blinking period that the cursor is visible: uint8_t (from 0 through 100) */
+  BRLAPI_PARAM_RENDERED_CELLS = 16,		/**< Cells rendered by the client: uint8_t[] (ISO 11548-1), one cell per element */
+
+//Navigation Parameters
+  BRLAPI_PARAM_SKIP_IDENTICAL_LINES = 17,	/**< Whether to skip identical screen lines: boolean */
+  BRLAPI_PARAM_AUDIBLE_ALERTS = 18,		/**< Whether to use audible alerts: boolean */
+
+//Clipboard Parameters
+  BRLAPI_PARAM_CLIPBOARD_CONTENT = 19,		/**< Content of the clipboard: UTF-8 string */
+
+//TTY Mode Parameters
+  BRLAPI_PARAM_BOUND_COMMAND_CODES = 20,	/**< Commands bound for the device:
+						  * uint64_t[], one command code per element */
+  BRLAPI_PARAM_COMMAND_SHORT_NAME = 21,		/**< Short name for a command
+						  * (specified via the subparam argument):
+						  * string (usually a few characters) */
+  BRLAPI_PARAM_COMMAND_LONG_NAME = 22,		/**< Long name for a command
+						  * (specified via the subparam argument):
+						  * string (usually a few words) */
+
+//Raw Mode Parameters
+  BRLAPI_PARAM_DEVICE_KEY_CODES = 23,		/**< Keys defined for the device:
+						  * uint64_t[], one key code per element */
+  BRLAPI_PARAM_KEY_SHORT_NAME = 24,		/**< Short name for a key
+						  * (specified via the subparam argument):
+						  * string (usually a few characters) */
+  BRLAPI_PARAM_KEY_LONG_NAME = 25,		/**< Long name for a key
+						  * (specified via the subparam argument):
+						  * string (usually a few words) */
+
+//Braille Translation Parameters
+  BRLAPI_PARAM_COMPUTER_BRAILLE_ROWS_MASK = 26,	/**< Set of Unicode rows that are defined for computer braille
+						  * (from U+0000 through U+10FFFF):
+						  * uint8_t[544], one bit per row, eight rows per element */
+  BRLAPI_PARAM_COMPUTER_BRAILLE_ROW_CELLS = 27,	/**< Computer braille cells for a Unicode row
+						  * (specified via the subparam argument):
+						  * uint8_t[256] (ISO 11548-1), one cell per element */
+  BRLAPI_PARAM_COMPUTER_BRAILLE_TABLE = 28,	/**< Name of the computer braille table: string */
+  BRLAPI_PARAM_LITERARY_BRAILLE_TABLE = 29,	/**< Name of the literary braille table: string */
+  BRLAPI_PARAM_MESSAGE_LOCALE = 30,		/**< Locale to use for messages: string */
+/* TODO: dot-to-unicode as well */
+
+ /* TODO: help strings */
+
+  BRLAPI_PARAM_COUNT = 32 /** Number of parameters */
+} brlapi_param_t;
+
+/* brlapi_param_subparam_t */
+/** Type to be used for specifying a sub-parameter */
+typedef uint64_t brlapi_param_subparam_t;
+
+/* brlapi_param_bool_t */
+/** Type to be used for boolean parameters */
+typedef uint8_t brlapi_param_bool_t;
+
+/* brlapi_param_serverVersion_t */
+/** Type to be used for BRLAPI_PARAM_SERVER_VERSION */
+typedef uint32_t brlapi_param_serverVersion_t;
+
+/* brlapi_param_clientPriority_t */
+/** Type to be used for BRLAPI_PARAM_CLIENT_PRIORITY */
+typedef uint32_t brlapi_param_clientPriority_t;
+
+/* BRLAPI_PARAM_CLIENT_PRIORITY_DEFAULT */
+/** Default value for BRLAPI_PARAM_CLIENT_PRIORITY */
+#define BRLAPI_PARAM_CLIENT_PRIORITY_DEFAULT 50
+
+/* brlapi_param_driverName_t */
+/** Type to be used for BRLAPI_PARAM_DRIVER_NAME */
+typedef char *brlapi_param_driverName_t;
+
+/* brlapi_param_driverCode_t */
+/** Type to be used for BRLAPI_PARAM_DRIVER_CODE */
+typedef char *brlapi_param_driverCode_t;
+
+/* brlapi_param_driverVersion_t */
+/** Type to be used for BRLAPI_PARAM_DRIVER_VERSION */
+typedef char *brlapi_param_driverVersion_t;
+
+/* brlapi_param_deviceModel_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_MODEL */
+typedef char *brlapi_param_deviceModel_t;
+
+/* brlapi_param_deviceCellSize_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_CELL_SIZE */
+typedef uint8_t brlapi_param_deviceCellSize_t;
+
+/* brlapi_param_displaySize_t */
+/** Type to be used for BRLAPI_PARAM_DISPLAY_SIZE */
+typedef struct {
+  uint32_t columns;
+  uint32_t rows;
+} brlapi_param_displaySize_t;
+
+/* brlapi_param_deviceIdentifier_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_IDENTIFIER */
+typedef char *brlapi_param_deviceIdentifier_t;
+
+/* brlapi_param_deviceSpeed_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_SPEED */
+typedef uint32_t brlapi_param_deviceSpeed_t;
+
+/* brlapi_param_deviceOnline_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_ONLINE */
+typedef brlapi_param_bool_t brlapi_param_deviceOnline_t;
+
+/* brlapi_param_retainDots_t */
+/** Type to be used for BRLAPI_PARAM_RETAIN_DOTS */
+typedef brlapi_param_bool_t brlapi_param_retainDots_t;
+
+/* brlapi_param_computerBrailleCellSize_t */
+/** Type to be used for BRLAPI_PARAM_COMPUTER_BRAILLE_CELL_SIZE */
+typedef uint8_t brlapi_param_computerBrailleCellSize_t;
+
+/* brlapi_param_literaryBraille_t */
+/** Type to be used for BRLAPI_PARAM_LITERARY_BRAILLE */
+typedef brlapi_param_bool_t brlapi_param_literaryBraille_t;
+
+/* brlapi_param_cursorDots_t */
+/** Type to be used for BRLAPI_PARAM_CURSOR_DOTS */
+typedef uint8_t brlapi_param_cursorDots_t;
+
+/* brlapi_param_cursorBlinkPeriod_t */
+/** Type to be used for BRLAPI_PARAM_CURSOR_BLINK_PERIOD */
+typedef uint32_t brlapi_param_cursorBlinkPeriod_t;
+
+/* brlapi_param_cursorBlinkPercentage_t */
+/** Type to be used for BRLAPI_PARAM_CURSOR_BLINK_PERCENTAGE */
+typedef uint8_t brlapi_param_cursorBlinkPercentage_t;
+
+/* brlapi_param_renderedCells_t */
+/** Type to be used for BRLAPI_PARAM_RENDERED_CELLS */
+typedef uint8_t *brlapi_param_renderedCells_t;
+
+/* brlapi_param_skipIdenticalLines_t */
+/** Type to be used for BRLAPI_PARAM_SKIP_IDENTICAL_LINES */
+typedef brlapi_param_bool_t brlapi_param_skipIdenticalLines_t;
+
+/* brlapi_param_audibleAlerts_t */
+/** Type to be used for BRLAPI_PARAM_AUDIBLE_ALERTS */
+typedef brlapi_param_bool_t brlapi_param_audibleAlerts_t;
+
+/* brlapi_param_clipboardContent_t */
+/** Type to be used for BRLAPI_PARAM_CLIPBOARD_CONTENT */
+typedef char *brlapi_param_clipboardContent_t;
+
+/* brlapi_param_commandCode_t */
+/** Type to be used for BRLAPI_PARAM_BOUND_COMMAND_CODES */
+typedef brlapi_keyCode_t brlapi_param_commandCode_t;
+
+/* brlapi_param_commandShortName_t */
+/** Type to be used for BRLAPI_PARAM_COMMAND_SHORT_NAME */
+typedef char *brlapi_param_commandShortName_t;
+
+/* brlapi_param_commandLongName_t */
+/** Type to be used for BRLAPI_PARAM_COMMAND_LONG_NAME */
+typedef char *brlapi_param_commandLongName_t;
+
+/* brlapi_param_keyCode_t */
+/** Type to be used for BRLAPI_PARAM_DEVICE_KEY_CODES */
+typedef brlapi_keyCode_t brlapi_param_keyCode_t;
+
+/* brlapi_param_keyShortName_t */
+/** Type to be used for BRLAPI_PARAM_KEY_SHORT_NAME */
+typedef char *brlapi_param_keyShortName_t;
+
+/* brlapi_param_keyLongName_t */
+/** Type to be used for BRLAPI_PARAM_KEY_LONG_NAME */
+typedef char *brlapi_param_keyLongName_t;
+
+/* brlapi_param_computerBrailleRowsMask_t */
+/** Type to be used for BRLAPI_PARAM_COMPUTER_BRAILLE_ROWS_MASK */
+typedef uint8_t brlapi_param_computerBrailleRowsMask_t[544];
+
+/* brlapi_param_computerBrailleRowCells_t */
+/** Type to be used for BRLAPI_PARAM_COMPUTER_BRAILLE_ROW_CELLS */
+typedef struct {
+  uint8_t cells[0X100];
+  uint8_t defined[0X100 / 8];
+} brlapi_param_computerBrailleRowCells_t;
+
+/* brlapi_param_computerBrailleTable_t */
+/** Type to be used for BRLAPI_PARAM_COMPUTER_BRAILLE_TABLE */
+typedef char *brlapi_param_computerBrailleTable_t;
+
+/* brlapi_param_literaryBrailleTable_t */
+/** Type to be used for BRLAPI_PARAM_LITERARY_BRAILLE_TABLE */
+typedef char *brlapi_param_literaryBrailleTable_t;
+
+/* brlapi_param_messageLocale_t */
+/** Type to be used for BRLAPI_PARAM_MESSAGE_LOCALE      */
+typedef char *brlapi_param_messageLocale_t;
+
+/** Enumeration of parameter value types */
+typedef enum {
+  BRLAPI_PARAM_TYPE_STRING,	/**< Parameter is a string of UTF-8 characters */
+  BRLAPI_PARAM_TYPE_BOOLEAN,	/**< Parameter is one or more booleans represented by a uint8_t */
+  BRLAPI_PARAM_TYPE_UINT8,	/**< Parameter is one or more 8-bit unsigned integers */
+  BRLAPI_PARAM_TYPE_UINT16,	/**< Parameter is one or more 16-bit unsigned integers */
+  BRLAPI_PARAM_TYPE_UINT32,	/**< Parameter is one or more 32-bit unsigned integers */
+  BRLAPI_PARAM_TYPE_UINT64,	/**< Parameter is one or more 64-bit unsigned integers */
+  BRLAPI_PARAM_TYPE_KEYCODE = BRLAPI_PARAM_TYPE_UINT64,	/**< Parameter is one or more key codes */
+} brlapi_param_type_t;
+
+/** Structure that describes the properties of a parameter */
+typedef struct {
+  brlapi_param_type_t type;	/**< Type of the parameter's value */
+  uint16_t count;		/**< Number of elements in the parameter's value */
+  uint8_t isArray;		/**< Whether the parameter contains several values, or always only one */
+  uint8_t hasSubparam;		/**< Parameter uses the subparam argument */
+} brlapi_param_properties_t;
+
+/** Enumeration of parameter types */
+/* brlapi_getParameterProperties */
+/** Return a description of the properties of a parameter
+ *
+ * \param parameter is the parameter whose properties describion shall be returned.
+ *
+ * \return a pointer to the description of the properties of the parameter.
+ */
+extern const brlapi_param_properties_t *brlapi_getParameterProperties(brlapi_param_t parameter);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED_PARAM */
diff --git a/chromium/third_party/libbrlapi/brlapi_protocol.h b/chromium/third_party/libbrlapi/brlapi_protocol.h
new file mode 100644
index 00000000000..f82d2f1aeb1
--- /dev/null
+++ b/chromium/third_party/libbrlapi/brlapi_protocol.h
@@ -0,0 +1,308 @@
+/*
+ * libbrlapi - A library providing access to braille terminals for applications.
+ *
+ * Copyright (C) 2002-2020 by
+ *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
+ *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
+ *
+ * libbrlapi comes with ABSOLUTELY NO WARRANTY.
+ *
+ * This is free software, placed under the terms of the
+ * GNU Lesser General Public License, as published by the Free Software
+ * Foundation; either version 2.1 of the License, or (at your option) any
+ * later version. Please see the file LICENSE-LGPL for details.
+ *
+ * Web Page: http://brltty.app/
+ *
+ * This software is maintained by Dave Mielke <dave@mielke.cc>.
+ */
+
+/** \file
+ * \brief types and constants for \e BrlAPI's protocol
+ */
+
+#ifndef BRLAPI_INCLUDED_PROTOCOL
+#define BRLAPI_INCLUDED_PROTOCOL
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "brlapi.h"
+
+/* this is for UINT32_MAX */
+#include <inttypes.h>
+#ifndef UINT32_MAX
+#define UINT32_MAX (4294967295U)
+#endif /* UINT32_MAX */
+
+/* The type size_t is defined there! */
+#include <unistd.h>
+
+/** \defgroup brlapi_protocol BrlAPI's protocol
+ * \brief Instructions and constants for \e BrlAPI 's protocol
+ *
+ * These are defines for the protocol between \e BrlAPI 's server and clients.
+ * Understanding is not needed to use the \e BrlAPI library, so reading this
+ * is not needed unless really wanting to connect to \e BrlAPI without
+ * \e BrlAPI 's library.
+ *
+ * @{ */
+
+#define BRLAPI_PROTOCOL_VERSION ((uint32_t) 8) /** Communication protocol version */
+
+/** Maximum packet size for packets exchanged on sockets and with braille
+ * terminal */
+#define BRLAPI_MAXPACKETSIZE 4096
+
+#define BRLAPI_PACKET_VERSION         'v'   /**< Version                     */
+#define BRLAPI_PACKET_AUTH            'a'   /**< Authorization               */
+#define BRLAPI_PACKET_GETDRIVERNAME   'n'   /**< Ask which driver is used    */
+#define BRLAPI_PACKET_GETMODELID      'd'   /**< Ask which model is used     */
+#define BRLAPI_PACKET_GETDISPLAYSIZE  's'   /**< Dimensions of brl display   */
+#define BRLAPI_PACKET_ENTERTTYMODE    't'   /**< Asks for a specified tty    */
+#define BRLAPI_PACKET_SETFOCUS        'F'   /**< Set current tty focus       */
+#define BRLAPI_PACKET_LEAVETTYMODE    'L'   /**< Release the tty             */
+#define BRLAPI_PACKET_KEY             'k'   /**< Braille key                 */
+#define BRLAPI_PACKET_IGNOREKEYRANGES 'm'   /**< Mask key ranges             */
+#define BRLAPI_PACKET_ACCEPTKEYRANGES 'u'   /**< Unmask key ranges           */
+#define BRLAPI_PACKET_WRITE           'w'   /**< Write                       */
+#define BRLAPI_PACKET_ENTERRAWMODE    '*'   /**< Enter in raw mode           */
+#define BRLAPI_PACKET_LEAVERAWMODE    '#'   /**< Leave raw mode              */
+#define BRLAPI_PACKET_PACKET          'p'   /**< Raw packets                 */
+#define BRLAPI_PACKET_ACK             'A'   /**< Acknowledgement             */
+#define BRLAPI_PACKET_ERROR           'e'   /**< non-fatal error             */
+#define BRLAPI_PACKET_EXCEPTION       'E'   /**< Exception                   */
+#define BRLAPI_PACKET_SUSPENDDRIVER   'S'   /**< Suspend driver              */
+#define BRLAPI_PACKET_RESUMEDRIVER    'R'   /**< Resume driver               */
+#define BRLAPI_PACKET_PARAM_VALUE     (('P'<<8) + 'V') /**< Parameter value  */
+#define BRLAPI_PACKET_PARAM_REQUEST   (('P'<<8) + 'R') /**< Parameter request*/
+#define BRLAPI_PACKET_PARAM_UPDATE    (('P'<<8) + 'U') /**< Parameter update */
+
+/** Magic number to give when sending a BRLPACKET_ENTERRAWMODE or BRLPACKET_SUSPEND packet */
+#define BRLAPI_DEVICE_MAGIC (0xdeadbeefL)
+
+/** Structure of packets headers */
+typedef struct {
+  uint32_t size;
+  brlapi_packetType_t type;
+} brlapi_header_t;
+
+/** Size of packet headers */
+#define BRLAPI_HEADERSIZE sizeof(brlapi_header_t)
+
+/** Structure of version packets */
+typedef struct {
+  uint32_t protocolVersion;
+} brlapi_versionPacket_t;
+
+/** Structure of authorization packets */
+typedef struct {
+  uint32_t type;
+  unsigned char key;
+} brlapi_authClientPacket_t;
+
+typedef struct {
+  uint32_t type[1];
+} brlapi_authServerPacket_t;
+
+#define BRLAPI_AUTH_NONE 'N' /**< No or implicit authorization              */
+#define BRLAPI_AUTH_KEY  'K' /**< Key authorization                         */
+#define BRLAPI_AUTH_CRED 'C' /**< Explicit socket credentials authorization */
+
+/** Structure of error packets */
+typedef struct {
+  uint32_t code;
+  brlapi_packetType_t type;
+  unsigned char packet;
+} brlapi_errorPacket_t;
+
+/** Structure of enterRawMode / suspend packets */
+typedef struct {
+  uint32_t magic;
+  unsigned char nameLength;
+  char name;
+} brlapi_getDriverSpecificModePacket_t;
+
+/** Flags for writing */
+#define BRLAPI_WF_DISPLAYNUMBER 0X01    /**< Display number                 */
+#define BRLAPI_WF_REGION        0X02    /**< Region parameter               */
+#define BRLAPI_WF_TEXT          0X04    /**< Contains some text             */
+#define BRLAPI_WF_ATTR_AND      0X08    /**< And attributes                 */
+#define BRLAPI_WF_ATTR_OR       0X10    /**< Or attributes                  */
+#define BRLAPI_WF_CURSOR        0X20    /**< Cursor position                */
+#define BRLAPI_WF_CHARSET       0X40    /**< Charset                        */
+
+/** Structure of extended write packets */
+typedef struct {
+  uint32_t flags; /** Flags to tell which fields are present */
+  unsigned char data; /** Fields in the same order as flag weight */
+} brlapi_writeArgumentsPacket_t;
+
+/** Flags for parameter values */
+#define BRLAPI_PVF_GLOBAL            0X01    /** Value is the global value */
+
+#define BRLAPI_MAXPARAMSIZE (BRLAPI_MAXPACKETSIZE - (sizeof(uint32_t) + sizeof(brlapi_param_t) + 2*sizeof(uint32_t)))
+
+/** Structure of Parameter value or update */
+typedef struct {
+  uint32_t flags; /** Flags to tell how value was gotten */
+  brlapi_param_t param; /** Which parameter being transmitted */
+  uint32_t subparam_hi; /** Which sub-parameter being transmitted, hi 32bits */
+  uint32_t subparam_lo; /** Which sub-parameter being transmitted, lo 32bits */
+  unsigned char data[BRLAPI_MAXPARAMSIZE]; /** Content of the parameter */
+} brlapi_paramValuePacket_t;
+
+/** Flags for parameter requests */
+#define BRLAPI_PARAMF_GET            0X100    /** Get current parameter value    */
+#define BRLAPI_PARAMF_SUBSCRIBE      0X200    /** Subscribe to parameter updates */
+#define BRLAPI_PARAMF_UNSUBSCRIBE    0X400    /** Unsubscribe from parameter updates */
+
+/** Structure of Parameter request */
+typedef struct {
+  uint32_t flags; /** Flags to tell whether/how to get values */
+  brlapi_param_t param; /** Which parameter to be transmitted */
+  uint32_t subparam_hi; /** Which sub-parameter being transmitted, hi 32bits */
+  uint32_t subparam_lo; /** Which sub-parameter being transmitted, lo 32bits */
+} brlapi_paramRequestPacket_t;
+
+/** Type for packets.  Should be used instead of a mere char[], since it has
+ * correct alignment requirements. */
+typedef union {
+	unsigned char data[BRLAPI_MAXPACKETSIZE];
+	brlapi_versionPacket_t version;
+	brlapi_authClientPacket_t authClient;
+	brlapi_authServerPacket_t authServer;
+	brlapi_errorPacket_t error;
+	brlapi_getDriverSpecificModePacket_t getDriverSpecificMode;
+	brlapi_writeArgumentsPacket_t writeArguments;
+	brlapi_paramValuePacket_t paramValue;
+	brlapi_paramRequestPacket_t paramRequest;
+	uint32_t uint32;
+} brlapi_packet_t;
+
+/* brlapi_writePacket */
+/** Send a packet to \e BrlAPI server
+ *
+ * This function is for internal use, but one might use it if one really knows
+ * what one is doing...
+ *
+ * \e type should only be one of the above defined BRLPACKET_*.
+ *
+ * The syntax is the same as write()'s.
+ *
+ * \return 0 on success, -1 on failure.
+ *
+ * \sa brlapi_readPacketHeader()
+ * brlapi_readPacketContent()
+ * brlapi_readPacket()
+ */
+ssize_t brlapi_writePacket(brlapi_fileDescriptor fd, brlapi_packetType_t type, const void *buf, size_t size);
+
+/* brlapi_readPacketHeader */
+/** Read the header (type+size) of a packet from \e BrlAPI server
+ *
+ * This function is for internal use, but one might use it if one really knows
+ * what one is doing...
+ *
+ * \e type is where the function will store the packet type; it should always
+ * be one of the above defined BRLPACKET_* (or else something very nasty must
+ * have happened :/).
+ *
+ * \return packet's size, -2 if \c EOF occurred, -1 on error or signal
+ * interruption.
+ *
+ * \sa brlapi_writePacket()
+ * brlapi_readPacketContent
+ * brlapi_readPacket
+ */
+ssize_t brlapi_readPacketHeader(brlapi_fileDescriptor fd, brlapi_packetType_t *packetType);
+
+/* brlapi_readPacketContent */
+/** Read the content of a packet from \e BrlAPI server
+ *
+ * This function is for internal use, but one might use it if one really knows
+ * what one is doing...
+ *
+ * \e packetSize is the size announced by \e brlapi_readPacketHeader()
+ *
+ * \e bufSize is the size of \e buf
+ *
+ * \return packetSize, -2 if \c EOF occurred, -1 on error.
+ *
+ * If the packet is larger than the supplied buffer, the buffer will be
+ * filled with the beginning of the packet, the rest of the packet being
+ * discarded. This follows the semantics of the recv system call when the
+ * MSG_TRUNC option is given.
+ *
+ * \sa brlapi_writePacket()
+ * brlapi_readPacketHeader()
+ * brlapi_readPacket()
+ */
+ssize_t brlapi_readPacketContent(brlapi_fileDescriptor fd, size_t packetSize, void *buf, size_t bufSize);
+
+/* brlapi_readPacket */
+/** Read a packet from \e BrlAPI server
+ *
+ * This function is for internal use, but one might use it if one really knows
+ * what one is doing...
+ *
+ * \e type is where the function will store the packet type; it should always
+ * be one of the above defined BRLPACKET_* (or else something very nasty must
+ * have happened :/).
+ *
+ * The syntax is the same as read()'s.
+ *
+ * \return packet's size, -2 if \c EOF occurred, -1 on error or signal
+ * interruption.
+ *
+ * If the packet is larger than the supplied buffer, the buffer will be
+ * filled with the beginning of the packet, the rest of the packet being
+ * discarded. This follows the semantics of the recv system call when the
+ * MSG_TRUNC option is given.
+ *
+ * \sa brlapi_writePacket()
+ */
+ssize_t brlapi_readPacket(brlapi_fileDescriptor fd, brlapi_packetType_t *type, void *buf, size_t size);
+
+/* brlapi_fd_mutex */
+/** Mutex for protecting concurrent fd access
+ *
+ * In order to regulate concurrent access to the library's file descriptor and
+ * requests to / answers from \e BrlAPI server, every function of the library
+ * locks this mutex, namely
+ *
+ * - brlapi_openConnection()
+ * - brlapi_closeConnection()
+ * - brlapi_enterRawMode()
+ * - brlapi_leaveRawMode()
+ * - brlapi_sendRaw()
+ * - brlapi_recvRaw()
+ * - brlapi_getDriverName()
+ * - brlapi_getDisplaySize()
+ * - brlapi_enterTtyMode()
+ * - brlapi_enterTtyModeWithPath()
+ * - brlapi_leaveTtyMode()
+ * - brlapi_*write*()
+ * - brlapi_(un)?ignorekey(Range|Set)()
+ * - brlapi_readKey()
+ *
+ * If both these functions and brlapi_writePacket() or brlapi_readPacket() are
+ * used in a multithreaded application, this mutex must be locked before calling
+ * brlapi_writePacket() or brlapi_readPacket(), and unlocked afterwards.
+ */
+#ifdef __MINGW32__
+#include <windows.h>
+extern HANDLE brlapi_fd_mutex;
+#else /* __MINGW32__ */
+#include <pthread.h>
+extern pthread_mutex_t brlapi_fd_mutex;
+#endif /* __MINGW32__ */
+
+/* @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BRLAPI_INCLUDED_PROTOCOL */