1 // Copyright (c) 2012 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/renderer/extensions/chrome_v8_context_set.h" 6 7 #include "base/logging.h" 8 #include "base/message_loop/message_loop.h" 9 #include "base/tracked_objects.h" 10 #include "base/values.h" 11 #include "chrome/common/url_constants.h" 12 #include "chrome/renderer/extensions/chrome_v8_context.h" 13 #include "content/public/renderer/render_thread.h" 14 #include "content/public/renderer/render_view.h" 15 #include "extensions/common/constants.h" 16 #include "extensions/common/extension.h" 17 #include "third_party/WebKit/public/platform/WebURL.h" 18 #include "third_party/WebKit/public/platform/WebURLRequest.h" 19 #include "third_party/WebKit/public/web/WebDocument.h" 20 #include "third_party/WebKit/public/web/WebFrame.h" 21 #include "third_party/WebKit/public/web/WebView.h" 22 #include "v8/include/v8.h" 23 24 using content::RenderThread; 25 26 namespace extensions { 27 ChromeV8ContextSet()28ChromeV8ContextSet::ChromeV8ContextSet() { 29 } ~ChromeV8ContextSet()30ChromeV8ContextSet::~ChromeV8ContextSet() { 31 } 32 size() const33int ChromeV8ContextSet::size() const { 34 return static_cast<int>(contexts_.size()); 35 } 36 Add(ChromeV8Context * context)37void ChromeV8ContextSet::Add(ChromeV8Context* context) { 38 if (DCHECK_IS_ON()) { 39 // It's OK to insert the same context twice, but we should only ever have 40 // one ChromeV8Context per v8::Context. 41 for (ContextSet::iterator iter = contexts_.begin(); iter != contexts_.end(); 42 ++iter) { 43 ChromeV8Context* candidate = *iter; 44 if (candidate != context) 45 DCHECK(candidate->v8_context() != context->v8_context()); 46 } 47 } 48 contexts_.insert(context); 49 } 50 Remove(ChromeV8Context * context)51void ChromeV8ContextSet::Remove(ChromeV8Context* context) { 52 if (contexts_.erase(context)) { 53 context->Invalidate(); 54 base::MessageLoop::current()->DeleteSoon(FROM_HERE, context); 55 } 56 } 57 GetAll() const58ChromeV8ContextSet::ContextSet ChromeV8ContextSet::GetAll() const { 59 return contexts_; 60 } 61 GetCurrent() const62ChromeV8Context* ChromeV8ContextSet::GetCurrent() const { 63 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 64 return isolate->InContext() ? GetByV8Context(isolate->GetCurrentContext()) 65 : NULL; 66 } 67 GetCalling() const68ChromeV8Context* ChromeV8ContextSet::GetCalling() const { 69 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 70 v8::Local<v8::Context> calling = isolate->GetCallingContext(); 71 return calling.IsEmpty() ? NULL : GetByV8Context(calling); 72 } 73 GetByV8Context(v8::Handle<v8::Context> v8_context) const74ChromeV8Context* ChromeV8ContextSet::GetByV8Context( 75 v8::Handle<v8::Context> v8_context) const { 76 for (ContextSet::const_iterator iter = contexts_.begin(); 77 iter != contexts_.end(); ++iter) { 78 if ((*iter)->v8_context() == v8_context) 79 return *iter; 80 } 81 82 return NULL; 83 } 84 ForEach(const std::string & extension_id,content::RenderView * render_view,const base::Callback<void (ChromeV8Context *)> & callback) const85void ChromeV8ContextSet::ForEach( 86 const std::string& extension_id, 87 content::RenderView* render_view, 88 const base::Callback<void(ChromeV8Context*)>& callback) const { 89 // We copy the context list, because calling into javascript may modify it 90 // out from under us. 91 ContextSet contexts = GetAll(); 92 93 for (ContextSet::iterator it = contexts.begin(); it != contexts.end(); 94 ++it) { 95 ChromeV8Context* context = *it; 96 97 // For the same reason as above, contexts may become invalid while we run. 98 if (!context->is_valid()) 99 continue; 100 101 if (!extension_id.empty()) { 102 const Extension* extension = context->extension(); 103 if (!extension || (extension_id != extension->id())) 104 continue; 105 } 106 107 content::RenderView* context_render_view = context->GetRenderView(); 108 if (!context_render_view) 109 continue; 110 111 if (render_view && render_view != context_render_view) 112 continue; 113 114 callback.Run(context); 115 } 116 } 117 OnExtensionUnloaded(const std::string & extension_id)118ChromeV8ContextSet::ContextSet ChromeV8ContextSet::OnExtensionUnloaded( 119 const std::string& extension_id) { 120 ContextSet contexts = GetAll(); 121 ContextSet removed; 122 123 // Clean up contexts belonging to the unloaded extension. This is done so 124 // that content scripts (which remain injected into the page) don't continue 125 // receiving events and sending messages. 126 for (ContextSet::iterator it = contexts.begin(); it != contexts.end(); 127 ++it) { 128 if ((*it)->extension() && (*it)->extension()->id() == extension_id) { 129 (*it)->DispatchOnUnloadEvent(); 130 removed.insert(*it); 131 Remove(*it); 132 } 133 } 134 135 return removed; 136 } 137 138 } // namespace extensions 139