components/plugins/renderer/loadable_plugin_placeholder.h

   1 // Copyright 2015 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 #ifndef COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_
   6 #define COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/timer/timer.h"
  10 #include "components/plugins/renderer/plugin_placeholder.h"
  11 #include "content/public/common/webplugininfo.h"
  12 #include "content/public/renderer/plugin_instance_throttler.h"
  13 #include "content/public/renderer/render_thread.h"
  14
  15 namespace plugins {
  16 // Placeholders can be used if a plugin is missing or not available
  17 // (blocked or disabled).
  18 class LoadablePluginPlaceholder : public PluginPlaceholderBase {
  19  public:
  20   void set_blocked_for_background_tab(bool blocked_for_background_tab) {
  21     is_blocked_for_background_tab_ = blocked_for_background_tab;
  22   }
  23
  24   void set_blocked_for_prerendering(bool blocked_for_prerendering) {
  25     is_blocked_for_prerendering_ = blocked_for_prerendering;
  26   }
  27
  28   bool power_saver_enabled() const { return power_saver_enabled_; }
  29
  30   void set_power_saver_enabled(bool power_saver_enabled) {
  31     power_saver_enabled_ = power_saver_enabled;
  32   }
  33
  34   // Defer loading of plugin, and instead show the Power Saver poster image.
  35   void BlockForPowerSaverPoster();
  36
  37   // When we load the plugin, use this already-created plugin, not a new one.
  38   void SetPremadePlugin(content::PluginInstanceThrottler* throttler);
  39
  40   void DisallowLoading() { allow_loading_ = false; }
  41
  42  protected:
  43   LoadablePluginPlaceholder(content::RenderFrame* render_frame,
  44                             blink::WebLocalFrame* frame,
  45                             const blink::WebPluginParams& params,
  46                             const std::string& html_data);
  47
  48   ~LoadablePluginPlaceholder() override;
  49
  50   void MarkPluginEssential(
  51       content::PluginInstanceThrottler::PowerSaverUnthrottleMethod method);
  52
  53   void OnLoadBlockedPlugins(const std::string& identifier);
  54   void OnSetIsPrerendering(bool is_prerendering);
  55
  56   void SetMessage(const base::string16& message);
  57   void SetPluginInfo(const content::WebPluginInfo& plugin_info);
  58   const content::WebPluginInfo& GetPluginInfo() const;
  59   void SetIdentifier(const std::string& identifier);
  60   const std::string& GetIdentifier() const;
  61   bool LoadingAllowed() const { return allow_loading_; }
  62
  63   // Replace this placeholder with a different plugin (which could be
  64   // a placeholder again).
  65   void ReplacePlugin(blink::WebPlugin* new_plugin);
  66
  67   // Load the blocked plugin.
  68   void LoadPlugin();
  69
  70   // Javascript callbacks:
  71   void LoadCallback();
  72   void DidFinishLoadingCallback();
  73
  74  private:
  75   // WebViewPlugin::Delegate methods:
  76   void PluginDestroyed() override;
  77   v8::Local<v8::Object> GetV8ScriptableObject(
  78       v8::Isolate* isolate) const override;
  79   void OnUnobscuredSizeUpdate(const gfx::Size& unobscured_size) override;
  80
  81   // RenderFrameObserver methods:
  82   void WasShown() override;
  83
  84   void UpdateMessage();
  85
  86   bool LoadingBlocked() const;
  87   void RecheckSizeAndMaybeUnthrottle();
  88
  89   // Plugin creation is embedder-specific.
  90   virtual blink::WebPlugin* CreatePlugin() = 0;
  91
  92   content::WebPluginInfo plugin_info_;
  93
  94   base::string16 message_;
  95
  96   // True if the plugin load was deferred due to page being a background tab.
  97   // Plugin may be automatically loaded when the page is foregrounded.
  98   bool is_blocked_for_background_tab_;
  99
 100   // True if the plugin was blocked because the page was being prerendered.
 101   // Plugin may be automatically be loaded when the page is displayed.
 102   bool is_blocked_for_prerendering_;
 103
 104   // True if the plugin load was deferred due to a Power Saver poster.
 105   bool is_blocked_for_power_saver_poster_;
 106
 107   // True if power saver is enabled for this plugin and it has not been marked
 108   // essential (by a click or retroactive whitelisting).
 109   bool power_saver_enabled_;
 110
 111   // When we load, uses this premade plugin instead of creating a new one.
 112   content::PluginInstanceThrottler* premade_throttler_;
 113
 114   bool allow_loading_;
 115
 116   bool finished_loading_;
 117   std::string identifier_;
 118
 119   // Used to prevent re-entrancy during the size recheck for throttled plugins.
 120   bool in_size_recheck_;
 121   gfx::Size unobscured_size_;
 122   base::OneShotTimer<LoadablePluginPlaceholder> size_update_timer_;
 123
 124   base::WeakPtrFactory<LoadablePluginPlaceholder> weak_factory_;
 125
 126   DISALLOW_COPY_AND_ASSIGN(LoadablePluginPlaceholder);
 127 };
 128
 129 }  // namespace plugins
 130
 131 #endif  // COMPONENTS_PLUGINS_RENDERER_LOADABLE_PLUGIN_PLACEHOLDER_H_