extensions/renderer/extension_helper.cc

   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 #include "extensions/renderer/extension_helper.h"
   6
   7 #include "content/public/renderer/render_view.h"
   8 #include "content/public/renderer/render_view_visitor.h"
   9 #include "extensions/common/constants.h"
  10 #include "extensions/common/extension_messages.h"
  11 #include "extensions/common/permissions/permissions_data.h"
  12 #include "extensions/common/url_pattern_set.h"
  13 #include "extensions/renderer/api/automation/automation_api_helper.h"
  14 #include "extensions/renderer/console.h"
  15 #include "extensions/renderer/dispatcher.h"
  16 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  17 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
  18 #include "third_party/WebKit/public/web/WebDocument.h"
  19 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  20 #include "third_party/WebKit/public/web/WebView.h"
  21
  22 using content::ConsoleMessageLevel;
  23 using blink::WebConsoleMessage;
  24 using blink::WebDataSource;
  25 using blink::WebFrame;
  26 using blink::WebLocalFrame;
  27 using blink::WebURLRequest;
  28 using blink::WebView;
  29
  30 namespace extensions {
  31
  32 namespace {
  33
  34 // A RenderViewVisitor class that iterates through the set of available
  35 // views, looking for a view of the given type, in the given browser window
  36 // and within the given extension.
  37 // Used to accumulate the list of views associated with an extension.
  38 class ViewAccumulator : public content::RenderViewVisitor {
  39  public:
  40   ViewAccumulator(const std::string& extension_id,
  41                   int browser_window_id,
  42                   ViewType view_type)
  43       : extension_id_(extension_id),
  44         browser_window_id_(browser_window_id),
  45         view_type_(view_type) {
  46   }
  47
  48   std::vector<content::RenderView*> views() { return views_; }
  49
  50   // Returns false to terminate the iteration.
  51   bool Visit(content::RenderView* render_view) override {
  52     ExtensionHelper* helper = ExtensionHelper::Get(render_view);
  53     if (!ViewTypeMatches(helper->view_type(), view_type_))
  54       return true;
  55
  56     GURL url = render_view->GetWebView()->mainFrame()->document().url();
  57     if (!url.SchemeIs(kExtensionScheme))
  58       return true;
  59     const std::string& extension_id = url.host();
  60     if (extension_id != extension_id_)
  61       return true;
  62
  63     if (browser_window_id_ != extension_misc::kUnknownWindowId &&
  64         helper->browser_window_id() != browser_window_id_) {
  65       return true;
  66     }
  67
  68     views_.push_back(render_view);
  69
  70     if (view_type_ == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE)
  71       return false;  // There can be only one...
  72     return true;
  73   }
  74
  75  private:
  76   // Returns true if |type| "isa" |match|.
  77   static bool ViewTypeMatches(ViewType type, ViewType match) {
  78     if (type == match)
  79       return true;
  80
  81     // INVALID means match all.
  82     if (match == VIEW_TYPE_INVALID)
  83       return true;
  84
  85     return false;
  86   }
  87
  88   std::string extension_id_;
  89   int browser_window_id_;
  90   ViewType view_type_;
  91   std::vector<content::RenderView*> views_;
  92 };
  93
  94 }  // namespace
  95
  96 // static
  97 std::vector<content::RenderView*> ExtensionHelper::GetExtensionViews(
  98     const std::string& extension_id,
  99     int browser_window_id,
 100     ViewType view_type) {
 101   ViewAccumulator accumulator(extension_id, browser_window_id, view_type);
 102   content::RenderView::ForEach(&accumulator);
 103   return accumulator.views();
 104 }
 105
 106 // static
 107 content::RenderView* ExtensionHelper::GetBackgroundPage(
 108     const std::string& extension_id) {
 109   ViewAccumulator accumulator(extension_id, extension_misc::kUnknownWindowId,
 110                               VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
 111   content::RenderView::ForEach(&accumulator);
 112   CHECK_LE(accumulator.views().size(), 1u);
 113   if (accumulator.views().size() == 0)
 114     return NULL;
 115   return accumulator.views()[0];
 116 }
 117
 118 ExtensionHelper::ExtensionHelper(content::RenderView* render_view,
 119                                  Dispatcher* dispatcher)
 120     : content::RenderViewObserver(render_view),
 121       content::RenderViewObserverTracker<ExtensionHelper>(render_view),
 122       dispatcher_(dispatcher),
 123       view_type_(VIEW_TYPE_INVALID),
 124       browser_window_id_(-1) {
 125   // Lifecycle managed by RenderViewObserver.
 126   new AutomationApiHelper(render_view);
 127 }
 128
 129 ExtensionHelper::~ExtensionHelper() {
 130 }
 131
 132 bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
 133   bool handled = true;
 134   IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)
 135     IPC_MESSAGE_HANDLER(ExtensionMsg_Response, OnExtensionResponse)
 136     IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnExtensionMessageInvoke)
 137     IPC_MESSAGE_HANDLER(ExtensionMsg_SetFrameName, OnSetFrameName)
 138     IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateBrowserWindowId,
 139                         OnUpdateBrowserWindowId)
 140     IPC_MESSAGE_HANDLER(ExtensionMsg_NotifyRenderViewType,
 141                         OnNotifyRendererViewType)
 142     IPC_MESSAGE_HANDLER(ExtensionMsg_AddMessageToConsole,
 143                         OnAddMessageToConsole)
 144     IPC_MESSAGE_HANDLER(ExtensionMsg_AppWindowClosed,
 145                         OnAppWindowClosed)
 146     IPC_MESSAGE_UNHANDLED(handled = false)
 147   IPC_END_MESSAGE_MAP()
 148   return handled;
 149 }
 150
 151 void ExtensionHelper::DidCreateDocumentElement(WebLocalFrame* frame) {
 152   dispatcher_->DidCreateDocumentElement(frame);
 153 }
 154
 155 void ExtensionHelper::DraggableRegionsChanged(blink::WebFrame* frame) {
 156   blink::WebVector<blink::WebDraggableRegion> webregions =
 157       frame->document().draggableRegions();
 158   std::vector<DraggableRegion> regions;
 159   for (size_t i = 0; i < webregions.size(); ++i) {
 160     DraggableRegion region;
 161     region.bounds = webregions[i].bounds;
 162     region.draggable = webregions[i].draggable;
 163     regions.push_back(region);
 164   }
 165   Send(new ExtensionHostMsg_UpdateDraggableRegions(routing_id(), regions));
 166 }
 167
 168 void ExtensionHelper::DidMatchCSS(
 169     blink::WebLocalFrame* frame,
 170     const blink::WebVector<blink::WebString>& newly_matching_selectors,
 171     const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
 172   dispatcher_->DidMatchCSS(
 173       frame, newly_matching_selectors, stopped_matching_selectors);
 174 }
 175
 176 void ExtensionHelper::OnExtensionResponse(int request_id,
 177                                           bool success,
 178                                           const base::ListValue& response,
 179                                           const std::string& error) {
 180   dispatcher_->OnExtensionResponse(request_id,
 181                                    success,
 182                                    response,
 183                                    error);
 184 }
 185
 186 void ExtensionHelper::OnExtensionMessageInvoke(const std::string& extension_id,
 187                                                const std::string& module_name,
 188                                                const std::string& function_name,
 189                                                const base::ListValue& args,
 190                                                bool user_gesture) {
 191   dispatcher_->InvokeModuleSystemMethod(
 192       render_view(), extension_id, module_name, function_name, args,
 193       user_gesture);
 194 }
 195
 196 void ExtensionHelper::OnNotifyRendererViewType(ViewType type) {
 197   view_type_ = type;
 198 }
 199
 200 void ExtensionHelper::OnSetFrameName(const std::string& name) {
 201   blink::WebView* web_view = render_view()->GetWebView();
 202   if (web_view)
 203     web_view->mainFrame()->setName(blink::WebString::fromUTF8(name));
 204 }
 205
 206 void ExtensionHelper::OnUpdateBrowserWindowId(int window_id) {
 207   browser_window_id_ = window_id;
 208 }
 209
 210 void ExtensionHelper::OnAddMessageToConsole(ConsoleMessageLevel level,
 211                                             const std::string& message) {
 212   console::AddMessage(render_view(), level, message);
 213 }
 214
 215 void ExtensionHelper::OnAppWindowClosed() {
 216   v8::HandleScope scope(v8::Isolate::GetCurrent());
 217   v8::Local<v8::Context> v8_context =
 218       render_view()->GetWebView()->mainFrame()->mainWorldScriptContext();
 219   ScriptContext* script_context =
 220       dispatcher_->script_context_set().GetByV8Context(v8_context);
 221   if (!script_context)
 222     return;
 223   script_context->module_system()->CallModuleMethod("app.window",
 224                                                     "onAppWindowClosed");
 225 }
 226
 227 }  // namespace extensions