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/window_event_dispatcher.h"
  10 #include "ui/aura/window_tree_host.h"
  11 #include "ui/compositor/compositor.h"
  12
  13 namespace content {
  14
  15 CompositorResizeLock::CompositorResizeLock(
  16     aura::WindowTreeHost* host,
  17     const gfx::Size new_size,
  18     bool defer_compositor_lock,
  19     const base::TimeDelta& timeout)
  20     : ResizeLock(new_size, defer_compositor_lock),
  21       host_(host),
  22       weak_ptr_factory_(this),
  23       cancelled_(false) {
  24   DCHECK(host_);
  25
  26   TRACE_EVENT_ASYNC_BEGIN2("ui", "CompositorResizeLock", this,
  27                            "width", expected_size().width(),
  28                            "height", expected_size().height());
  29   host_->dispatcher()->HoldPointerMoves();
  30
  31   BrowserThread::PostDelayedTask(
  32       BrowserThread::UI, FROM_HERE,
  33       base::Bind(&CompositorResizeLock::CancelLock,
  34                  weak_ptr_factory_.GetWeakPtr()),
  35       timeout);
  36 }
  37
  38 CompositorResizeLock::~CompositorResizeLock() {
  39   CancelLock();
  40   TRACE_EVENT_ASYNC_END2("ui", "CompositorResizeLock", this,
  41                          "width", expected_size().width(),
  42                          "height", expected_size().height());
  43 }
  44
  45 bool CompositorResizeLock::GrabDeferredLock() {
  46   return ResizeLock::GrabDeferredLock();
  47 }
  48
  49 void CompositorResizeLock::UnlockCompositor() {
  50   ResizeLock::UnlockCompositor();
  51   compositor_lock_ = NULL;
  52 }
  53
  54 void CompositorResizeLock::LockCompositor() {
  55   ResizeLock::LockCompositor();
  56   compositor_lock_ = host_->compositor()->GetCompositorLock();
  57 }
  58
  59 void CompositorResizeLock::CancelLock() {
  60   if (cancelled_)
  61     return;
  62   cancelled_ = true;
  63   UnlockCompositor();
  64   host_->dispatcher()->ReleasePointerMoves();
  65 }
  66
  67 }  // namespace content