android_webview/browser/aw_contents_client_bridge_base.cc

   1 // Copyright (c) 2013 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 "android_webview/browser/aw_contents_client_bridge_base.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8 #include "content/public/browser/render_frame_host.h"
   9 #include "content/public/browser/web_contents.h"
  10
  11 using content::BrowserThread;
  12 using content::WebContents;
  13
  14 namespace android_webview {
  15
  16 namespace {
  17
  18 const void* kAwContentsClientBridgeBase = &kAwContentsClientBridgeBase;
  19
  20 // This class is invented so that the UserData registry that we inject the
  21 // AwContentsClientBridgeBase object does not own and destroy it.
  22 class UserData : public base::SupportsUserData::Data {
  23  public:
  24   static AwContentsClientBridgeBase* GetContents(
  25       content::WebContents* web_contents) {
  26     if (!web_contents)
  27       return NULL;
  28     UserData* data = static_cast<UserData*>(
  29         web_contents->GetUserData(kAwContentsClientBridgeBase));
  30     return data ? data->contents_ : NULL;
  31   }
  32
  33   explicit UserData(AwContentsClientBridgeBase* ptr) : contents_(ptr) {}
  34  private:
  35   AwContentsClientBridgeBase* contents_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(UserData);
  38 };
  39
  40 } // namespace
  41
  42 // static
  43 void AwContentsClientBridgeBase::Associate(
  44     WebContents* web_contents,
  45     AwContentsClientBridgeBase* handler) {
  46   web_contents->SetUserData(kAwContentsClientBridgeBase,
  47                             new UserData(handler));
  48 }
  49
  50 // static
  51 AwContentsClientBridgeBase* AwContentsClientBridgeBase::FromWebContents(
  52     WebContents* web_contents) {
  53   return UserData::GetContents(web_contents);
  54 }
  55
  56 // static
  57 AwContentsClientBridgeBase* AwContentsClientBridgeBase::FromID(
  58     int render_process_id,
  59     int render_frame_id) {
  60   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  61   content::RenderFrameHost* rfh =
  62       content::RenderFrameHost::FromID(render_process_id, render_frame_id);
  63   content::WebContents* web_contents =
  64       content::WebContents::FromRenderFrameHost(rfh);
  65   return UserData::GetContents(web_contents);
  66 }
  67
  68 AwContentsClientBridgeBase::~AwContentsClientBridgeBase() {
  69 }
  70
  71 }  // namespace android_webview