content/browser/renderer_host/media/web_contents_tracker.cc - Issue 172003004: Fixit: Move tab and desktop capture code to new location.

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Issue 172003004: Fixit: Move tab and desktop capture code to new location. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: rebase Created 6 years, 10 months ago

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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 "content/browser/renderer_host/media/web_contents_tracker.h"

6

7 #include "base/message_loop/message_loop_proxy.h"

8 #include "content/public/browser/browser_thread.h"

9 #include "content/public/browser/render_process_host.h"

10 #include "content/public/browser/render_view_host.h"

11 #include "content/public/browser/web_contents.h"

12

13 namespace content {

14

15 WebContentsTracker::WebContentsTracker() {}

16

17 WebContentsTracker::~WebContentsTracker() {

18 DCHECK(!web_contents()) << "BUG: Still observering!";

19 }

20

21 void WebContentsTracker::Start(int render_process_id, int render_view_id,

22 const ChangeCallback& callback) {

23 DCHECK(!message_loop_.get() \|\| message_loop_->BelongsToCurrentThread());

24

25 message_loop_ = base::MessageLoopProxy::current();

26 DCHECK(message_loop_.get());

27 callback_ = callback;

28

29 BrowserThread::PostTask(

30 BrowserThread::UI, FROM_HERE,

31 base::Bind(&WebContentsTracker::LookUpAndObserveWebContents, this,

32 render_process_id, render_view_id));

33 }

34

35 void WebContentsTracker::Stop() {

36 DCHECK(message_loop_->BelongsToCurrentThread());

37

38 callback_.Reset();

39

40 BrowserThread::PostTask(

41 BrowserThread::UI, FROM_HERE,

42 base::Bind(&WebContentsTracker::Observe, this,

43 static_cast<WebContents*>(NULL)));

44 }

45

46 void WebContentsTracker::OnWebContentsChangeEvent() {

47 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

48

49 WebContents* const wc = web_contents();

50 RenderViewHost* const rvh = wc ? wc->GetRenderViewHost() : NULL;

51 RenderProcessHost* const rph = rvh ? rvh->GetProcess() : NULL;

52

53 const int render_process_id = rph ? rph->GetID() : MSG_ROUTING_NONE;

54 const int render_view_id = rvh ? rvh->GetRoutingID() : MSG_ROUTING_NONE;

55

56 message_loop_->PostTask(FROM_HERE,

57 base::Bind(&WebContentsTracker::MaybeDoCallback, this,

58 render_process_id, render_view_id));

59 }

60

61 void WebContentsTracker::MaybeDoCallback(int render_process_id,

62 int render_view_id) {

63 DCHECK(message_loop_->BelongsToCurrentThread());

64

65 if (!callback_.is_null())

66 callback_.Run(render_process_id, render_view_id);

67 }

68

69 void WebContentsTracker::LookUpAndObserveWebContents(int render_process_id,

70 int render_view_id) {

71 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

72

73 RenderViewHost* const rvh =

74 RenderViewHost::FromID(render_process_id, render_view_id);

75 DVLOG_IF(1, !rvh) << "RenderViewHost::FromID("

76 << render_process_id << ", " << render_view_id

77 << ") returned NULL.";

78 Observe(rvh ? WebContents::FromRenderViewHost(rvh) : NULL);

79 DVLOG_IF(1, !web_contents())

80 << "WebContents::FromRenderViewHost(" << rvh << ") returned NULL.";

81

82 OnWebContentsChangeEvent();

83 }

84

85 void WebContentsTracker::RenderViewReady() {

86 OnWebContentsChangeEvent();

87 }

88

89 void WebContentsTracker::AboutToNavigateRenderView(RenderViewHost* rvh) {

90 OnWebContentsChangeEvent();

91 }

92

93 void WebContentsTracker::DidNavigateMainFrame(

94 const LoadCommittedDetails& details, const FrameNavigateParams& params) {

95 OnWebContentsChangeEvent();

96 }

97

98 void WebContentsTracker::WebContentsDestroyed(WebContents* web_contents) {

99 OnWebContentsChangeEvent();

100 }

101

102 } // namespace content

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