content/browser/renderer_host/compositor_resize_lock_aura.cc

   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 "content/browser/renderer_host/compositor_resize_lock_aura.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "content/public/browser/browser_thread.h"
   9 #include "ui/aura/root_window.h"
  10 #include "ui/compositor/compositor.h"
  11
  12 namespace content {
  13
  14 CompositorResizeLock::CompositorResizeLock(aura::RootWindow* root_window,
  15                                            const gfx::Size new_size,
  16                                            bool defer_compositor_lock,
  17                                            const base::TimeDelta& timeout)
  18     : ResizeLock(new_size, defer_compositor_lock),
  19       root_window_(root_window),
  20       weak_ptr_factory_(this),
  21       cancelled_(false) {
  22   DCHECK(root_window_);
  23
  24   TRACE_EVENT_ASYNC_BEGIN2("ui", "CompositorResizeLock", this,
  25                            "width", expected_size().width(),
  26                            "height", expected_size().height());
  27   root_window_->HoldPointerMoves();
  28
  29   BrowserThread::PostDelayedTask(
  30       BrowserThread::UI, FROM_HERE,
  31       base::Bind(&CompositorResizeLock::CancelLock,
  32                  weak_ptr_factory_.GetWeakPtr()),
  33       timeout);
  34 }
  35
  36 CompositorResizeLock::~CompositorResizeLock() {
  37   CancelLock();
  38   TRACE_EVENT_ASYNC_END2("ui", "CompositorResizeLock", this,
  39                          "width", expected_size().width(),
  40                          "height", expected_size().height());
  41 }
  42
  43 bool CompositorResizeLock::GrabDeferredLock() {
  44   return ResizeLock::GrabDeferredLock();
  45 }
  46
  47 void CompositorResizeLock::UnlockCompositor() {
  48   ResizeLock::UnlockCompositor();
  49   compositor_lock_ = NULL;
  50 }
  51
  52 void CompositorResizeLock::LockCompositor() {
  53   ResizeLock::LockCompositor();
  54   compositor_lock_ = root_window_->host()->compositor()->GetCompositorLock();
  55 }
  56
  57 void CompositorResizeLock::CancelLock() {
  58   if (cancelled_)
  59     return;
  60   cancelled_ = true;
  61   UnlockCompositor();
  62   root_window_->ReleasePointerMoves();
  63 }
  64
  65 }  // namespace content