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| 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_USER_SCRIPT_SCHEDULER_H_ | |
| 6 #define EXTENSIONS_RENDERER_USER_SCRIPT_SCHEDULER_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <queue> | |
| 10 | |
| 11 #include "base/memory/linked_ptr.h" | |
| 12 #include "base/memory/weak_ptr.h" | |
| 13 #include "extensions/common/user_script.h" | |
| 14 | |
| 15 class RenderView; | |
| 16 struct ExtensionMsg_ExecuteCode_Params; | |
| 17 | |
| 18 namespace blink { | |
| 19 class WebFrame; | |
| 20 } | |
| 21 | |
| 22 namespace extensions { | |
| 23 class Dispatcher; | |
| 24 | |
| 25 // Implements support for injecting scripts at different times in the document | |
| 26 // loading process. The different possible time are described in | |
| 27 // UserScript::RunLocation. | |
| 28 // | |
| 29 // Currently, determining idleness is simple: it is whichever of the following | |
| 30 // happens first: | |
| 31 // | |
| 32 // a) When the initial DOM for a page is complete + kUserScriptIdleTimeout, | |
| 33 // b) or when the page has completely loaded including all subresources. | |
| 34 // | |
| 35 // The intent of this mechanism is to prevent user scripts from slowing down | |
| 36 // fast pages (run after load), while still allowing them to run relatively | |
| 37 // timely for pages with lots of slow subresources. | |
| 38 // | |
| 39 // NOTE: this class does not inherit from RenderViewObserver on purpose. The | |
| 40 // reason is that this object is per frame, and a frame can move across | |
| 41 // RenderViews thanks to adoptNode. So we have each RenderView's | |
| 42 // ExtensionHelper proxy these calls to the renderer process' Dispatcher, | |
| 43 // which contains the mapping from WebFrame to us. | |
| 44 class UserScriptScheduler { | |
| 45 public: | |
| 46 UserScriptScheduler(blink::WebFrame* frame, Dispatcher* dispatcher); | |
| 47 ~UserScriptScheduler(); | |
| 48 | |
| 49 void ExecuteCode(const ExtensionMsg_ExecuteCode_Params& params); | |
| 50 void DidCreateDocumentElement(); | |
| 51 void DidFinishDocumentLoad(); | |
| 52 void DidFinishLoad(); | |
| 53 void DidStartProvisionalLoad(); | |
| 54 | |
| 55 private: | |
| 56 typedef | |
| 57 std::queue<linked_ptr<ExtensionMsg_ExecuteCode_Params> > | |
| 58 ExecutionQueue; | |
| 59 | |
| 60 // Run user scripts, except if they've already run for this frame, or the | |
| 61 // frame has been destroyed. | |
| 62 void MaybeRun(); | |
| 63 | |
| 64 // Backend for the IPC Message ExecuteCode in addition to being used | |
| 65 // internally. | |
| 66 void ExecuteCodeImpl(const ExtensionMsg_ExecuteCode_Params& params); | |
| 67 | |
| 68 // Get all child frames of parent_frame, returned by frames_vector. | |
| 69 bool GetAllChildFrames(blink::WebFrame* parent_frame, | |
| 70 std::vector<blink::WebFrame*>* frames_vector) const; | |
| 71 | |
| 72 // Call to signify thet the idle timeout has expired. | |
| 73 void IdleTimeout(); | |
| 74 | |
| 75 base::WeakPtrFactory<UserScriptScheduler> weak_factory_; | |
| 76 | |
| 77 // The Frame we will run scripts in. | |
| 78 blink::WebFrame* frame_; | |
| 79 | |
| 80 // The current location in the document loading process. | |
| 81 // Will be UserScript::UNDEFINED if it is before any scripts should be run. | |
| 82 UserScript::RunLocation current_location_; | |
| 83 | |
| 84 // Whether we have already run the idle scripts. | |
| 85 bool has_run_idle_; | |
| 86 | |
| 87 // This is only used if we're for the main frame. | |
| 88 std::map<UserScript::RunLocation, ExecutionQueue> pending_execution_map_; | |
| 89 | |
| 90 Dispatcher* dispatcher_; | |
| 91 }; | |
| 92 | |
| 93 } // namespace extensions | |
| 94 | |
| 95 #endif // EXTENSIONS_RENDERER_USER_SCRIPT_SCHEDULER_H_ | |
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Chromium Code Reviews
Issue 321993003:
Refactor renderer-side script injection (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src