Initial import.

1 files changed, 219 insertions, 0 deletions

diff --git a/chromium/ppapi/cpp/module.cc b/chromium/ppapi/cpp/module.cc
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+++ b/chromium/ppapi/cpp/module.cc
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+// Copyright (c) 2012 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.
+
+// Note that the single accessor, Module::Get(), is not actually implemented
+// in this file.  This is an intentional hook that allows users of ppapi's
+// C++ wrapper objects to provide different semantics for how the singleton
+// object is accessed.
+//
+// In general, users of ppapi will also link in ppp_entrypoints.cc, which
+// provides a simple default implementation of Module::Get().
+//
+// A notable exception where the default ppp_entrypoints will not work is
+// when implementing "internal plugins" that are statically linked into the
+// browser. In this case, the process may actually have multiple Modules
+// loaded at once making a traditional "singleton" unworkable.  To get around
+// this, the users of ppapi need to get creative about how to properly
+// implement the Module::Get() so that ppapi's C++ wrappers can find the
+// right Module object.  One example solution is to use thread local storage
+// to change the Module* returned based on which thread is invoking the
+// function. Leaving Module::Get() unimplemented provides a hook for
+// implementing such behavior.
+
+#include "ppapi/cpp/module.h"
+
+#include <string.h>
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/c/ppp_input_event.h"
+#include "ppapi/c/ppp_instance.h"
+#include "ppapi/c/ppp_messaging.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/rect.h"
+#include "ppapi/cpp/resource.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/cpp/var.h"
+#include "ppapi/cpp/view.h"
+
+namespace pp {
+
+// PPP_InputEvent implementation -----------------------------------------------
+
+PP_Bool InputEvent_HandleEvent(PP_Instance pp_instance, PP_Resource resource) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return PP_FALSE;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return PP_FALSE;
+
+  return PP_FromBool(instance->HandleInputEvent(InputEvent(resource)));
+}
+
+const PPP_InputEvent input_event_interface = {
+  &InputEvent_HandleEvent
+};
+
+// PPP_Instance implementation -------------------------------------------------
+
+PP_Bool Instance_DidCreate(PP_Instance pp_instance,
+                           uint32_t argc,
+                           const char* argn[],
+                           const char* argv[]) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return PP_FALSE;
+
+  Instance* instance = module_singleton->CreateInstance(pp_instance);
+  if (!instance)
+    return PP_FALSE;
+  module_singleton->current_instances_[pp_instance] = instance;
+  return PP_FromBool(instance->Init(argc, argn, argv));
+}
+
+void Instance_DidDestroy(PP_Instance instance) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return;
+  Module::InstanceMap::iterator found =
+      module_singleton->current_instances_.find(instance);
+  if (found == module_singleton->current_instances_.end())
+    return;
+
+  // Remove it from the map before deleting to try to catch reentrancy.
+  Instance* obj = found->second;
+  module_singleton->current_instances_.erase(found);
+  delete obj;
+}
+
+void Instance_DidChangeView(PP_Instance pp_instance,
+                            PP_Resource view_resource) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return;
+  instance->DidChangeView(View(view_resource));
+}
+
+void Instance_DidChangeFocus(PP_Instance pp_instance, PP_Bool has_focus) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return;
+  instance->DidChangeFocus(PP_ToBool(has_focus));
+}
+
+PP_Bool Instance_HandleDocumentLoad(PP_Instance pp_instance,
+                                    PP_Resource pp_url_loader) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return PP_FALSE;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return PP_FALSE;
+  return PP_FromBool(instance->HandleDocumentLoad(URLLoader(pp_url_loader)));
+}
+
+static PPP_Instance instance_interface = {
+  &Instance_DidCreate,
+  &Instance_DidDestroy,
+  &Instance_DidChangeView,
+  &Instance_DidChangeFocus,
+  &Instance_HandleDocumentLoad
+};
+
+// PPP_Messaging implementation ------------------------------------------------
+
+void Messaging_HandleMessage(PP_Instance pp_instance, PP_Var var) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return;
+  instance->HandleMessage(Var(PASS_REF, var));
+}
+
+static PPP_Messaging instance_messaging_interface = {
+  &Messaging_HandleMessage
+};
+
+// Module ----------------------------------------------------------------------
+
+Module::Module() : pp_module_(0), get_browser_interface_(NULL), core_(NULL) {
+}
+
+Module::~Module() {
+  delete core_;
+  core_ = NULL;
+}
+
+bool Module::Init() {
+  return true;
+}
+
+const void* Module::GetPluginInterface(const char* interface_name) {
+  if (strcmp(interface_name, PPP_INPUT_EVENT_INTERFACE) == 0)
+    return &input_event_interface;
+  if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0)
+    return &instance_interface;
+  if (strcmp(interface_name, PPP_MESSAGING_INTERFACE) == 0)
+    return &instance_messaging_interface;
+
+  // Now see if anything was dynamically registered.
+  InterfaceMap::const_iterator found = additional_interfaces_.find(
+      std::string(interface_name));
+  if (found != additional_interfaces_.end())
+    return found->second;
+
+  return NULL;
+}
+
+const void* Module::GetBrowserInterface(const char* interface_name) {
+  return get_browser_interface_(interface_name);
+}
+
+Instance* Module::InstanceForPPInstance(PP_Instance instance) {
+  InstanceMap::iterator found = current_instances_.find(instance);
+  if (found == current_instances_.end())
+    return NULL;
+  return found->second;
+}
+
+void Module::AddPluginInterface(const std::string& interface_name,
+                                const void* vtable) {
+  // Verify that we're not trying to register an interface that's already
+  // handled, and if it is, that we're re-registering with the same vtable.
+  // Calling GetPluginInterface rather than looking it up in the map allows
+  // us to also catch "internal" ones in addition to just previously added ones.
+  const void* existing_interface = GetPluginInterface(interface_name.c_str());
+  if (existing_interface) {
+    PP_DCHECK(vtable == existing_interface);
+    return;
+  }
+  additional_interfaces_[interface_name] = vtable;
+}
+
+bool Module::InternalInit(PP_Module mod,
+                          PPB_GetInterface get_browser_interface) {
+  pp_module_ = mod;
+  get_browser_interface_ = get_browser_interface;
+
+  // Get the core interface which we require to run.
+  const PPB_Core* core = reinterpret_cast<const PPB_Core*>(GetBrowserInterface(
+      PPB_CORE_INTERFACE));
+  if (!core)
+    return false;
+  core_ = new Core(core);
+
+  return Init();
+}
+
+}  // namespace pp