chrome/browser/ui/libgtk2ui/unity_service.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/libgtk2ui/unity_service.h"
   6
   7 #include <dlfcn.h>
   8 #include <string>
   9
  10 #include <gtk/gtk.h>
  11
  12 #include "base/environment.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/nix/xdg_util.h"
  15 #include "chrome/browser/shell_integration_linux.h"
  16 #include "chrome/browser/ui/libgtk2ui/gtk2_util.h"
  17
  18 // Unity data typedefs.
  19 typedef struct _UnityInspector UnityInspector;
  20 typedef UnityInspector* (*unity_inspector_get_default_func)(void);
  21 typedef gboolean (*unity_inspector_get_unity_running_func)
  22     (UnityInspector* self);
  23
  24 typedef struct _UnityLauncherEntry UnityLauncherEntry;
  25 typedef UnityLauncherEntry* (*unity_launcher_entry_get_for_desktop_id_func)
  26     (const gchar* desktop_id);
  27 typedef void (*unity_launcher_entry_set_count_func)(UnityLauncherEntry* self,
  28                                                gint64 value);
  29 typedef void (*unity_launcher_entry_set_count_visible_func)
  30     (UnityLauncherEntry* self, gboolean value);
  31 typedef void (*unity_launcher_entry_set_progress_func)(UnityLauncherEntry* self,
  32                                                        gdouble value);
  33 typedef void (*unity_launcher_entry_set_progress_visible_func)
  34     (UnityLauncherEntry* self, gboolean value);
  35
  36
  37 namespace {
  38
  39 bool attempted_load = false;
  40
  41 // Unity has a singleton object that we can ask whether the unity is running.
  42 UnityInspector* inspector = NULL;
  43
  44 // A link to the desktop entry in the panel.
  45 UnityLauncherEntry* chrome_entry = NULL;
  46
  47 // Retrieved functions from libunity.
  48 unity_inspector_get_unity_running_func get_unity_running = NULL;
  49 unity_launcher_entry_set_count_func entry_set_count = NULL;
  50 unity_launcher_entry_set_count_visible_func entry_set_count_visible = NULL;
  51 unity_launcher_entry_set_progress_func entry_set_progress = NULL;
  52 unity_launcher_entry_set_progress_visible_func entry_set_progress_visible =
  53     NULL;
  54
  55 void EnsureMethodsLoaded() {
  56   using base::nix::GetDesktopEnvironment;
  57
  58   if (attempted_load)
  59     return;
  60   attempted_load = true;
  61
  62   scoped_ptr<base::Environment> env(base::Environment::Create());
  63   if (GetDesktopEnvironment(env.get()) != base::nix::DESKTOP_ENVIRONMENT_UNITY)
  64     return;
  65
  66   // Ubuntu still hasn't given us a nice libunity.so symlink.
  67   void* unity_lib = dlopen("libunity.so.4", RTLD_LAZY);
  68   if (!unity_lib)
  69     unity_lib = dlopen("libunity.so.6", RTLD_LAZY);
  70   if (!unity_lib)
  71     unity_lib = dlopen("libunity.so.9", RTLD_LAZY);
  72   if (!unity_lib)
  73     return;
  74
  75   unity_inspector_get_default_func inspector_get_default =
  76       reinterpret_cast<unity_inspector_get_default_func>(
  77           dlsym(unity_lib, "unity_inspector_get_default"));
  78   if (inspector_get_default) {
  79     inspector = inspector_get_default();
  80
  81     get_unity_running =
  82         reinterpret_cast<unity_inspector_get_unity_running_func>(
  83             dlsym(unity_lib, "unity_inspector_get_unity_running"));
  84   }
  85
  86   unity_launcher_entry_get_for_desktop_id_func entry_get_for_desktop_id =
  87       reinterpret_cast<unity_launcher_entry_get_for_desktop_id_func>(
  88           dlsym(unity_lib, "unity_launcher_entry_get_for_desktop_id"));
  89   if (entry_get_for_desktop_id) {
  90     std::string desktop_id = libgtk2ui::GetDesktopName(env.get());
  91     chrome_entry = entry_get_for_desktop_id(desktop_id.c_str());
  92
  93     entry_set_count =
  94         reinterpret_cast<unity_launcher_entry_set_count_func>(
  95             dlsym(unity_lib, "unity_launcher_entry_set_count"));
  96
  97     entry_set_count_visible =
  98         reinterpret_cast<unity_launcher_entry_set_count_visible_func>(
  99             dlsym(unity_lib, "unity_launcher_entry_set_count_visible"));
 100
 101     entry_set_progress =
 102         reinterpret_cast<unity_launcher_entry_set_progress_func>(
 103             dlsym(unity_lib, "unity_launcher_entry_set_progress"));
 104
 105     entry_set_progress_visible =
 106         reinterpret_cast<unity_launcher_entry_set_progress_visible_func>(
 107             dlsym(unity_lib, "unity_launcher_entry_set_progress_visible"));
 108   }
 109 }
 110
 111 }  // namespace
 112
 113
 114 namespace unity {
 115
 116 bool IsRunning() {
 117   EnsureMethodsLoaded();
 118   if (inspector && get_unity_running)
 119     return get_unity_running(inspector);
 120
 121   return false;
 122 }
 123
 124 void SetDownloadCount(int count) {
 125   EnsureMethodsLoaded();
 126   if (chrome_entry && entry_set_count && entry_set_count_visible) {
 127     entry_set_count(chrome_entry, count);
 128     entry_set_count_visible(chrome_entry, count != 0);
 129   }
 130 }
 131
 132 void SetProgressFraction(float percentage) {
 133   EnsureMethodsLoaded();
 134   if (chrome_entry && entry_set_progress && entry_set_progress_visible) {
 135     entry_set_progress(chrome_entry, percentage);
 136     entry_set_progress_visible(chrome_entry,
 137                                percentage > 0.0 && percentage < 1.0);
 138   }
 139 }
 140
 141 }  // namespace unity