extensions/renderer/script_injection_manager.h

   1 // Copyright 2014 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 EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_
   6 #define EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <string>
  11
  12 #include "base/callback.h"
  13 #include "base/memory/scoped_vector.h"
  14 #include "base/memory/shared_memory.h"
  15 #include "base/scoped_observer.h"
  16 #include "extensions/common/user_script.h"
  17 #include "extensions/renderer/script_injection.h"
  18 #include "extensions/renderer/user_script_set_manager.h"
  19
  20 struct ExtensionMsg_ExecuteCode_Params;
  21
  22 namespace blink {
  23 class WebFrame;
  24 class WebLocalFrame;
  25 }
  26
  27 namespace content {
  28 class RenderView;
  29 }
  30
  31 namespace extensions {
  32 class Extension;
  33 class ExtensionSet;
  34
  35 // The ScriptInjectionManager manages extensions injecting scripts into frames
  36 // via both content/user scripts and tabs.executeScript(). It is responsible for
  37 // maintaining any pending injections awaiting permission or the appropriate
  38 // load point, and injecting them when ready.
  39 class ScriptInjectionManager : public UserScriptSetManager::Observer {
  40  public:
  41   ScriptInjectionManager(const ExtensionSet* extensions,
  42                          UserScriptSetManager* user_script_set_manager);
  43   virtual ~ScriptInjectionManager();
  44
  45   // Notifies that a new render view has been created.
  46   void OnRenderViewCreated(content::RenderView* render_view);
  47
  48  private:
  49   // A RenderViewObserver implementation which watches the various render views
  50   // in order to notify the ScriptInjectionManager of different document load
  51   // states.
  52   class RVOHelper;
  53
  54   typedef std::map<blink::WebFrame*, UserScript::RunLocation> FrameStatusMap;
  55
  56   // UserScriptSetManager::Observer implementation.
  57   virtual void OnUserScriptsUpdated(
  58       const std::set<std::string>& changed_extensions,
  59       const std::vector<UserScript*>& scripts) OVERRIDE;
  60
  61   // Notifies that an RVOHelper should be removed.
  62   void RemoveObserver(RVOHelper* helper);
  63
  64   // Invalidate any pending tasks associated with |frame|.
  65   void InvalidateForFrame(blink::WebFrame* frame);
  66
  67   // Inject appropriate scripts into |frame|.
  68   void InjectScripts(blink::WebFrame* frame,
  69                      UserScript::RunLocation run_location);
  70
  71   // Handle the ExecuteCode extension message.
  72   void HandleExecuteCode(const ExtensionMsg_ExecuteCode_Params& params,
  73                          content::RenderView* render_view);
  74
  75   // Handle the GrantInjectionPermission extension message.
  76   void HandlePermitScriptInjection(int64 request_id);
  77
  78   // Extensions metadata, owned by Dispatcher (which owns this object).
  79   const ExtensionSet* extensions_;
  80
  81   // The map of active web frames to their corresponding statuses. The
  82   // RunLocation of the frame corresponds to the last location that has ran.
  83   FrameStatusMap frame_statuses_;
  84
  85   // The collection of RVOHelpers.
  86   ScopedVector<RVOHelper> rvo_helpers_;
  87
  88   // The set of UserScripts associated with extensions. Owned by the Dispatcher.
  89   UserScriptSetManager* user_script_set_manager_;
  90
  91   // Pending injections which are waiting for either the proper run location or
  92   // user consent.
  93   ScopedVector<ScriptInjection> pending_injections_;
  94
  95   ScopedObserver<UserScriptSetManager, UserScriptSetManager::Observer>
  96       user_script_set_manager_observer_;
  97
  98   DISALLOW_COPY_AND_ASSIGN(ScriptInjectionManager);
  99 };
 100
 101 }  // namespace extensions
 102
 103 #endif  // EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_