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      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_view_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 = reinterpret_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_view_id) {
     60   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     61   const content::RenderViewHost* rvh =
     62       content::RenderViewHost::FromID(render_process_id, render_view_id);
     63   if (!rvh) return NULL;
     64   content::WebContents* web_contents =
     65       content::WebContents::FromRenderViewHost(rvh);
     66   return UserData::GetContents(web_contents);
     67 }
     68 
     69 AwContentsClientBridgeBase::~AwContentsClientBridgeBase() {
     70 }
     71 
     72 }  // namespace android_webview
     73