src/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/api/messaging/message.h"
  10 #include "extensions/common/constants.h"
  11 #include "extensions/common/extension_messages.h"
  12 #include "extensions/renderer/console.h"
  13 #include "extensions/renderer/dispatcher.h"
  14 #include "extensions/renderer/messaging_bindings.h"
  15 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  16 #include "third_party/WebKit/public/web/WebConsoleMessage.h"
  17 #include "third_party/WebKit/public/web/WebDocument.h"
  18 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  19 #include "third_party/WebKit/public/web/WebView.h"
  20
  21 using content::ConsoleMessageLevel;
  22 using blink::WebConsoleMessage;
  23 using blink::WebDataSource;
  24 using blink::WebFrame;
  25 using blink::WebLocalFrame;
  26 using blink::WebURLRequest;
  27 using blink::WebView;
  28
  29 namespace extensions {
  30
  31 namespace {
  32
  33 // A RenderViewVisitor class that iterates through the set of available
  34 // views, looking for a view of the given type, in the given browser window
  35 // and within the given extension.
  36 // Used to accumulate the list of views associated with an extension.
  37 class ViewAccumulator : public content::RenderViewVisitor {
  38  public:
  39   ViewAccumulator(const std::string& extension_id,
  40                   int browser_window_id,
  41                   ViewType view_type)
  42       : extension_id_(extension_id),
  43         browser_window_id_(browser_window_id),
  44         view_type_(view_type) {
  45   }
  46
  47   std::vector<content::RenderView*> views() { return views_; }
  48
  49   // Returns false to terminate the iteration.
  50   virtual bool Visit(content::RenderView* render_view) OVERRIDE {
  51     ExtensionHelper* helper = ExtensionHelper::Get(render_view);
  52     if (!ViewTypeMatches(helper->view_type(), view_type_))
  53       return true;
  54
  55     GURL url = render_view->GetWebView()->mainFrame()->document().url();
  56     if (!url.SchemeIs(kExtensionScheme))
  57       return true;
  58     const std::string& extension_id = url.host();
  59     if (extension_id != extension_id_)
  60       return true;
  61
  62     if (browser_window_id_ != extension_misc::kUnknownWindowId &&
  63         helper->browser_window_id() != browser_window_id_) {
  64       return true;
  65     }
  66
  67     views_.push_back(render_view);
  68
  69     if (view_type_ == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE)
  70       return false;  // There can be only one...
  71     return true;
  72   }
  73
  74  private:
  75   // Returns true if |type| "isa" |match|.
  76   static bool ViewTypeMatches(ViewType type, ViewType match) {
  77     if (type == match)
  78       return true;
  79
  80     // INVALID means match all.
  81     if (match == VIEW_TYPE_INVALID)
  82       return true;
  83
  84     return false;
  85   }
  86
  87   std::string extension_id_;
  88   int browser_window_id_;
  89   ViewType view_type_;
  90   std::vector<content::RenderView*> views_;
  91 };
  92
  93 }  // namespace
  94
  95 // static
  96 std::vector<content::RenderView*> ExtensionHelper::GetExtensionViews(
  97     const std::string& extension_id,
  98     int browser_window_id,
  99     ViewType view_type) {
 100   ViewAccumulator accumulator(extension_id, browser_window_id, view_type);
 101   content::RenderView::ForEach(&accumulator);
 102   return accumulator.views();
 103 }
 104
 105 // static
 106 content::RenderView* ExtensionHelper::GetBackgroundPage(
 107     const std::string& extension_id) {
 108   ViewAccumulator accumulator(extension_id, extension_misc::kUnknownWindowId,
 109                               VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
 110   content::RenderView::ForEach(&accumulator);
 111   CHECK_LE(accumulator.views().size(), 1u);
 112   if (accumulator.views().size() == 0)
 113     return NULL;
 114   return accumulator.views()[0];
 115 }
 116
 117 ExtensionHelper::ExtensionHelper(content::RenderView* render_view,
 118                                  Dispatcher* dispatcher)
 119     : content::RenderViewObserver(render_view),
 120       content::RenderViewObserverTracker<ExtensionHelper>(render_view),
 121       dispatcher_(dispatcher),
 122       view_type_(VIEW_TYPE_INVALID),
 123       tab_id_(-1),
 124       browser_window_id_(-1) {
 125 }
 126
 127 ExtensionHelper::~ExtensionHelper() {
 128 }
 129
 130 bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
 131   bool handled = true;
 132   IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)
 133     IPC_MESSAGE_HANDLER(ExtensionMsg_Response, OnExtensionResponse)
 134     IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnExtensionMessageInvoke)
 135     IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnConnect,
 136                         OnExtensionDispatchOnConnect)
 137     IPC_MESSAGE_HANDLER(ExtensionMsg_DeliverMessage, OnExtensionDeliverMessage)
 138     IPC_MESSAGE_HANDLER(ExtensionMsg_DispatchOnDisconnect,
 139                         OnExtensionDispatchOnDisconnect)
 140     IPC_MESSAGE_HANDLER(ExtensionMsg_SetTabId, OnSetTabId)
 141     IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateBrowserWindowId,
 142                         OnUpdateBrowserWindowId)
 143     IPC_MESSAGE_HANDLER(ExtensionMsg_NotifyRenderViewType,
 144                         OnNotifyRendererViewType)
 145     IPC_MESSAGE_HANDLER(ExtensionMsg_AddMessageToConsole,
 146                         OnAddMessageToConsole)
 147     IPC_MESSAGE_HANDLER(ExtensionMsg_AppWindowClosed,
 148                         OnAppWindowClosed)
 149     IPC_MESSAGE_UNHANDLED(handled = false)
 150   IPC_END_MESSAGE_MAP()
 151   return handled;
 152 }
 153
 154 void ExtensionHelper::DidCreateDocumentElement(WebLocalFrame* frame) {
 155   dispatcher_->DidCreateDocumentElement(frame);
 156 }
 157
 158 void ExtensionHelper::DraggableRegionsChanged(blink::WebFrame* frame) {
 159   blink::WebVector<blink::WebDraggableRegion> webregions =
 160       frame->document().draggableRegions();
 161   std::vector<DraggableRegion> regions;
 162   for (size_t i = 0; i < webregions.size(); ++i) {
 163     DraggableRegion region;
 164     region.bounds = webregions[i].bounds;
 165     region.draggable = webregions[i].draggable;
 166     regions.push_back(region);
 167   }
 168   Send(new ExtensionHostMsg_UpdateDraggableRegions(routing_id(), regions));
 169 }
 170
 171 void ExtensionHelper::DidMatchCSS(
 172     blink::WebLocalFrame* frame,
 173     const blink::WebVector<blink::WebString>& newly_matching_selectors,
 174     const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
 175   dispatcher_->DidMatchCSS(
 176       frame, newly_matching_selectors, stopped_matching_selectors);
 177 }
 178
 179 void ExtensionHelper::OnExtensionResponse(int request_id,
 180                                           bool success,
 181                                           const base::ListValue& response,
 182                                           const std::string& error) {
 183   dispatcher_->OnExtensionResponse(request_id,
 184                                    success,
 185                                    response,
 186                                    error);
 187 }
 188
 189 void ExtensionHelper::OnExtensionMessageInvoke(const std::string& extension_id,
 190                                                const std::string& module_name,
 191                                                const std::string& function_name,
 192                                                const base::ListValue& args,
 193                                                bool user_gesture) {
 194   dispatcher_->InvokeModuleSystemMethod(
 195       render_view(), extension_id, module_name, function_name, args,
 196       user_gesture);
 197 }
 198
 199 void ExtensionHelper::OnExtensionDispatchOnConnect(
 200     int target_port_id,
 201     const std::string& channel_name,
 202     const base::DictionaryValue& source_tab,
 203     const ExtensionMsg_ExternalConnectionInfo& info,
 204     const std::string& tls_channel_id) {
 205   MessagingBindings::DispatchOnConnect(dispatcher_->script_context_set(),
 206                                        target_port_id,
 207                                        channel_name,
 208                                        source_tab,
 209                                        info,
 210                                        tls_channel_id,
 211                                        render_view());
 212 }
 213
 214 void ExtensionHelper::OnExtensionDeliverMessage(int target_id,
 215                                                 const Message& message) {
 216   MessagingBindings::DeliverMessage(
 217       dispatcher_->script_context_set(), target_id, message, render_view());
 218 }
 219
 220 void ExtensionHelper::OnExtensionDispatchOnDisconnect(
 221     int port_id,
 222     const std::string& error_message) {
 223   MessagingBindings::DispatchOnDisconnect(
 224       dispatcher_->script_context_set(), port_id, error_message, render_view());
 225 }
 226
 227 void ExtensionHelper::OnNotifyRendererViewType(ViewType type) {
 228   view_type_ = type;
 229 }
 230
 231 void ExtensionHelper::OnSetTabId(int init_tab_id) {
 232   CHECK_EQ(tab_id_, -1);
 233   CHECK_GE(init_tab_id, 0);
 234   tab_id_ = init_tab_id;
 235 }
 236
 237 void ExtensionHelper::OnUpdateBrowserWindowId(int window_id) {
 238   browser_window_id_ = window_id;
 239 }
 240
 241 void ExtensionHelper::OnAddMessageToConsole(ConsoleMessageLevel level,
 242                                             const std::string& message) {
 243   console::AddMessage(render_view(), level, message);
 244 }
 245
 246 void ExtensionHelper::OnAppWindowClosed() {
 247   v8::HandleScope scope(v8::Isolate::GetCurrent());
 248   v8::Handle<v8::Context> v8_context =
 249       render_view()->GetWebView()->mainFrame()->mainWorldScriptContext();
 250   ScriptContext* script_context =
 251       dispatcher_->script_context_set().GetByV8Context(v8_context);
 252   if (!script_context)
 253     return;
 254   script_context->module_system()->CallModuleMethod("app.window",
 255                                                     "onAppWindowClosed");
 256 }
 257
 258 }  // namespace extensions