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       tab_id_(-1),
 125       browser_window_id_(-1) {
 126   // Lifecycle managed by RenderViewObserver.
 127   new AutomationApiHelper(render_view);
 128 }
 129
 130 ExtensionHelper::~ExtensionHelper() {
 131 }
 132
 133 bool ExtensionHelper::OnMessageReceived(const IPC::Message& message) {
 134   bool handled = true;
 135   IPC_BEGIN_MESSAGE_MAP(ExtensionHelper, message)
 136     IPC_MESSAGE_HANDLER(ExtensionMsg_Response, OnExtensionResponse)
 137     IPC_MESSAGE_HANDLER(ExtensionMsg_MessageInvoke, OnExtensionMessageInvoke)
 138     IPC_MESSAGE_HANDLER(ExtensionMsg_SetFrameName, OnSetFrameName)
 139     IPC_MESSAGE_HANDLER(ExtensionMsg_SetTabId, OnSetTabId)
 140     IPC_MESSAGE_HANDLER(ExtensionMsg_UpdateBrowserWindowId,
 141                         OnUpdateBrowserWindowId)
 142     IPC_MESSAGE_HANDLER(ExtensionMsg_NotifyRenderViewType,
 143                         OnNotifyRendererViewType)
 144     IPC_MESSAGE_HANDLER(ExtensionMsg_AddMessageToConsole,
 145                         OnAddMessageToConsole)
 146     IPC_MESSAGE_HANDLER(ExtensionMsg_AppWindowClosed,
 147                         OnAppWindowClosed)
 148     IPC_MESSAGE_UNHANDLED(handled = false)
 149   IPC_END_MESSAGE_MAP()
 150   return handled;
 151 }
 152
 153 void ExtensionHelper::DidCreateDocumentElement(WebLocalFrame* frame) {
 154   dispatcher_->DidCreateDocumentElement(frame);
 155 }
 156
 157 void ExtensionHelper::DraggableRegionsChanged(blink::WebFrame* frame) {
 158   blink::WebVector<blink::WebDraggableRegion> webregions =
 159       frame->document().draggableRegions();
 160   std::vector<DraggableRegion> regions;
 161   for (size_t i = 0; i < webregions.size(); ++i) {
 162     DraggableRegion region;
 163     region.bounds = webregions[i].bounds;
 164     region.draggable = webregions[i].draggable;
 165     regions.push_back(region);
 166   }
 167   Send(new ExtensionHostMsg_UpdateDraggableRegions(routing_id(), regions));
 168 }
 169
 170 void ExtensionHelper::DidMatchCSS(
 171     blink::WebLocalFrame* frame,
 172     const blink::WebVector<blink::WebString>& newly_matching_selectors,
 173     const blink::WebVector<blink::WebString>& stopped_matching_selectors) {
 174   dispatcher_->DidMatchCSS(
 175       frame, newly_matching_selectors, stopped_matching_selectors);
 176 }
 177
 178 void ExtensionHelper::OnExtensionResponse(int request_id,
 179                                           bool success,
 180                                           const base::ListValue& response,
 181                                           const std::string& error) {
 182   dispatcher_->OnExtensionResponse(request_id,
 183                                    success,
 184                                    response,
 185                                    error);
 186 }
 187
 188 void ExtensionHelper::OnExtensionMessageInvoke(const std::string& extension_id,
 189                                                const std::string& module_name,
 190                                                const std::string& function_name,
 191                                                const base::ListValue& args,
 192                                                bool user_gesture) {
 193   dispatcher_->InvokeModuleSystemMethod(
 194       render_view(), extension_id, module_name, function_name, args,
 195       user_gesture);
 196 }
 197
 198 void ExtensionHelper::OnNotifyRendererViewType(ViewType type) {
 199   view_type_ = type;
 200 }
 201
 202 void ExtensionHelper::OnSetFrameName(const std::string& name) {
 203   blink::WebView* web_view = render_view()->GetWebView();
 204   if (web_view)
 205     web_view->mainFrame()->setName(blink::WebString::fromUTF8(name));
 206 }
 207
 208 void ExtensionHelper::OnSetTabId(int init_tab_id) {
 209   CHECK_EQ(tab_id_, -1);
 210   CHECK_GE(init_tab_id, 0);
 211   tab_id_ = init_tab_id;
 212 }
 213
 214 void ExtensionHelper::OnUpdateBrowserWindowId(int window_id) {
 215   browser_window_id_ = window_id;
 216 }
 217
 218 void ExtensionHelper::OnAddMessageToConsole(ConsoleMessageLevel level,
 219                                             const std::string& message) {
 220   console::AddMessage(render_view(), level, message);
 221 }
 222
 223 void ExtensionHelper::OnAppWindowClosed() {
 224   v8::HandleScope scope(v8::Isolate::GetCurrent());
 225   v8::Handle<v8::Context> v8_context =
 226       render_view()->GetWebView()->mainFrame()->mainWorldScriptContext();
 227   ScriptContext* script_context =
 228       dispatcher_->script_context_set().GetByV8Context(v8_context);
 229   if (!script_context)
 230     return;
 231   script_context->module_system()->CallModuleMethod("app.window",
 232                                                     "onAppWindowClosed");
 233 }
 234
 235 }  // namespace extensions