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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 #include "chrome/renderer/extensions/chrome_extension_helper.h"
      6 
      7 #include "base/strings/string16.h"
      8 #include "chrome/common/extensions/chrome_extension_messages.h"
      9 #include "chrome/renderer/web_apps.h"
     10 #include "content/public/renderer/render_view.h"
     11 #include "ipc/ipc_message_macros.h"
     12 #include "third_party/WebKit/public/web/WebView.h"
     13 #include "url/gurl.h"
     14 #include "url/url_constants.h"
     15 
     16 namespace extensions {
     17 
     18 ChromeExtensionHelper::ChromeExtensionHelper(content::RenderView* render_view)
     19     : content::RenderViewObserver(render_view),
     20       content::RenderViewObserverTracker<ChromeExtensionHelper>(render_view) {
     21 }
     22 
     23 ChromeExtensionHelper::~ChromeExtensionHelper() {
     24 }
     25 
     26 bool ChromeExtensionHelper::OnMessageReceived(
     27     const IPC::Message& message) {
     28   bool handled = true;
     29   IPC_BEGIN_MESSAGE_MAP(ChromeExtensionHelper, message)
     30     IPC_MESSAGE_HANDLER(ChromeExtensionMsg_GetApplicationInfo,
     31                         OnGetApplicationInfo)
     32     IPC_MESSAGE_UNHANDLED(handled = false)
     33   IPC_END_MESSAGE_MAP()
     34   return handled;
     35 }
     36 
     37 void ChromeExtensionHelper::OnGetApplicationInfo(int page_id) {
     38   WebApplicationInfo app_info;
     39   if (page_id == render_view()->GetPageId()) {
     40     base::string16 error;
     41     web_apps::ParseWebAppFromWebDocument(
     42         render_view()->GetWebView()->mainFrame(), &app_info, &error);
     43   }
     44 
     45   // Prune out any data URLs in the set of icons.  The browser process expects
     46   // any icon with a data URL to have originated from a favicon.  We don't want
     47   // to decode arbitrary data URLs in the browser process.  See
     48   // http://b/issue?id=1162972
     49   for (size_t i = 0; i < app_info.icons.size(); ++i) {
     50     if (app_info.icons[i].url.SchemeIs(url::kDataScheme)) {
     51       app_info.icons.erase(app_info.icons.begin() + i);
     52       --i;
     53     }
     54   }
     55 
     56   Send(new ChromeExtensionHostMsg_DidGetApplicationInfo(
     57       routing_id(), page_id, app_info));
     58 }
     59 
     60 }  // namespace extensions
     61