1 // Copyright (c) 2012 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/browser/tab_contents/tab_util.h"
6
7 #include "chrome/browser/profiles/profile.h"
8 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
9 #include "chrome/common/chrome_switches.h"
10 #include "content/public/browser/render_view_host.h"
11 #include "content/public/browser/site_instance.h"
12 #include "content/public/browser/web_contents.h"
13 #include "url/gurl.h"
14
15 #if defined(ENABLE_EXTENSIONS)
16 #include "extensions/browser/extension_registry.h"
17 #endif
18
19 using content::RenderViewHost;
20 using content::SiteInstance;
21 using content::WebContents;
22
23 namespace tab_util {
24
GetWebContentsByID(int render_process_id,int render_view_id)25 content::WebContents* GetWebContentsByID(int render_process_id,
26 int render_view_id) {
27 RenderViewHost* render_view_host =
28 RenderViewHost::FromID(render_process_id, render_view_id);
29 if (!render_view_host)
30 return NULL;
31 return WebContents::FromRenderViewHost(render_view_host);
32 }
33
GetSiteInstanceForNewTab(Profile * profile,const GURL & url)34 SiteInstance* GetSiteInstanceForNewTab(Profile* profile,
35 const GURL& url) {
36 // If |url| is a WebUI or extension, we set the SiteInstance up front so that
37 // we don't end up with an extra process swap on the first navigation.
38 if (ChromeWebUIControllerFactory::GetInstance()->UseWebUIForURL(profile, url))
39 return SiteInstance::CreateForURL(profile, url);
40
41 #if defined(ENABLE_EXTENSIONS)
42 if (extensions::ExtensionRegistry::Get(
43 profile)->enabled_extensions().GetHostedAppByURL(url))
44 return SiteInstance::CreateForURL(profile, url);
45 #endif
46
47 // We used to share the SiteInstance for same-site links opened in new tabs,
48 // to leverage the in-memory cache and reduce process creation. It now
49 // appears that it is more useful to have such links open in a new process,
50 // so we create new tabs in a new BrowsingInstance.
51 return NULL;
52 }
53
54 } // namespace tab_util
55