Build shared code for gphoto2 and mtp as a convenience lib

Deduplicate code between gphoto2 and mtp by creating a convenience
library call libgvfscommon-gphoto2 which is only built if either libmtp
is used or gphoto2 with gudev is used.

https://bugzilla.gnome.org/show_bug.cgi?id=736285

3 files changed, 186 insertions, 0 deletions

diff --git a/common/Makefile.am b/common/Makefile.am
index 7f06cd4b..cfc1c230 100644
--- a/common/Makefile.am
+++ b/common/Makefile.am
@@ -67,6 +67,20 @@ libgvfscommon_dnssd_la_LIBADD =	\
 	$(GLIB_LIBS)
 endif
 
+if USE_GPHOTO2UTILS
+noinst_LTLIBRARIES += libgvfscommon-gphoto2.la
+
+libgvfscommon_gphoto2_la_SOURCES = \
+	gvfsgphoto2utils.c gvfsgphoto2utils.h \
+	$(NULL)
+
+libgvfscommon_gphoto2_la_CPPFLAGS = \
+	$(GUDEV_CFLAGS)
+
+libgvfscommon_gphoto2_la_LIBADD = \
+	$(GUDEV_LIBS)
+endif
+
 
 EXTRA_DIST = org.gtk.vfs.xml
 
diff --git a/common/gvfsgphoto2utils.c b/common/gvfsgphoto2utils.c
new file mode 100644
index 00000000..5d8fe17e
--- /dev/null
+++ b/common/gvfsgphoto2utils.c
@@ -0,0 +1,142 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "gvfsgphoto2utils.h"
+#include <string.h>
+#include <glib/gi18n-lib.h>
+
+static int hexdigit (char c)
+{
+  if (c >= 'a')
+    return c - 'a' + 10;
+  if (c >= 'A')
+   return c - 'A' + 10;
+  g_return_val_if_fail (c >= '0' && c <= '9', 0);
+  return c - '0';
+}
+
+/* Do not free result, it's a static buffer */
+static const char*
+udev_decode_string (const char* encoded)
+{
+  int len;
+  const char* s;
+  static char decoded[4096];
+
+  if (encoded == NULL)
+    return NULL;
+
+  for (len = 0, s = encoded; *s && len < sizeof (decoded) - 1; ++len, ++s) {
+    /* need to check for NUL terminator in advance */
+    if (s[0] == '\\' && s[1] == 'x' && s[2] >= '0' && s[3] >= '0') {
+      decoded[len] = (hexdigit (s[2]) << 4) | hexdigit (s[3]);
+      s += 3;
+    } else if (s[0] == '_' || s[0] == '-') {
+      decoded[len] = ' ';
+    } else {
+      decoded[len] = *s;
+    }
+  }
+  decoded[len] = '\0';
+
+  return decoded;
+}
+
+char *
+g_vfs_get_volume_name (GUdevDevice *device, const char *device_id)
+{
+  const char *gphoto_name;
+  const char *product = NULL;
+  const char *vendor;
+  const char *model;
+
+  /* our preference: device_id > ID_MEDIA_PLAYER_{VENDOR,PRODUCT} > product >
+   * ID_{VENDOR,MODEL} */
+
+  gphoto_name = g_udev_device_get_property (device, device_id);
+  if (gphoto_name != NULL && strcmp (gphoto_name, "1") != 0)
+    return g_strdup (gphoto_name);
+
+  vendor = g_udev_device_get_property (device, "ID_MEDIA_PLAYER_VENDOR");
+  if (vendor == NULL)
+    vendor = g_udev_device_get_property (device, "ID_VENDOR_ENC");
+  model = g_udev_device_get_property (device, "ID_MEDIA_PLAYER_MODEL");
+  if (model == NULL) {
+    model = g_udev_device_get_property (device, "ID_MODEL_ENC");
+    product = g_udev_device_get_sysfs_attr (device, "product");
+  }
+
+  if (product != NULL && strlen (product) > 0)
+    return g_strdup (udev_decode_string (product));
+  else if (vendor == NULL)
+    {
+      if (model != NULL)
+        return g_strdup (udev_decode_string (model));
+    }
+  else
+    {
+      if (model != NULL)
+        {
+          /* we can't call udev_decode_string() twice in one g_strdup_printf(),
+           * it returns a static buffer */
+          gchar *temp = g_strconcat (vendor, " ", model, NULL);
+          gchar *name = g_strdup (udev_decode_string (temp));
+          g_free (temp);
+          return name;
+        }
+      else
+        {
+          if (g_udev_device_has_property (device, "ID_MEDIA_PLAYER"))
+            {
+              /* Translators: %s is the device vendor */
+              return g_strdup_printf (_("%s Audio Player"), udev_decode_string (vendor));
+            }
+          else
+            {
+              /* Translators: %s is the device vendor */
+              return g_strdup_printf (_("%s Camera"), udev_decode_string (vendor));
+            }
+        }
+    }
+
+  return g_strdup (_("Camera"));
+}
+
+char *
+g_vfs_get_volume_icon (GUdevDevice *device)
+{
+  if (g_udev_device_has_property (device, "ID_MEDIA_PLAYER_ICON_NAME"))
+    return g_strdup (g_udev_device_get_property (device, "ID_MEDIA_PLAYER_ICON_NAME"));
+  else if (g_udev_device_has_property (device, "ID_MEDIA_PLAYER"))
+    return g_strdup ("multimedia-player");
+  else
+    return g_strdup ("camera-photo");
+}
+
+char *
+g_vfs_get_volume_symbolic_icon (GUdevDevice *device)
+{
+  if (g_udev_device_has_property (device, "ID_MEDIA_PLAYER_ICON_NAME"))
+    return g_strconcat (g_udev_device_get_property (device, "ID_MEDIA_PLAYER_ICON_NAME"), "-symbolic", NULL);
+  else if (g_udev_device_has_property (device, "ID_MEDIA_PLAYER"))
+    return g_strdup ("multimedia-player-symbolic");
+  else
+    return g_strdup ("camera-photo-symbolic");
+}
diff --git a/common/gvfsgphoto2utils.h b/common/gvfsgphoto2utils.h
new file mode 100644
index 00000000..d8f9d405
--- /dev/null
+++ b/common/gvfsgphoto2utils.h
@@ -0,0 +1,30 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __G_VFS_GPHOTO2_UTILS_H__
+#define __G_VFS_GPHOTO2_UTILS_H__
+
+#include <glib.h>
+#include <gudev/gudev.h>
+
+char * g_vfs_get_volume_name (GUdevDevice *device, const char *device_id);
+char * g_vfs_get_volume_icon (GUdevDevice *device);
+char * g_vfs_get_volume_symbolic_icon (GUdevDevice *device);
+
+#endif