Abstract fullscreen exit bubble logic to bring Linux's behaviour in line with

chrome/browser/ui/fullscreen_exit_bubble.cc

Index: chrome/browser/ui/fullscreen_exit_bubble.cc
diff --git a/chrome/browser/ui/fullscreen_exit_bubble.cc b/chrome/browser/ui/fullscreen_exit_bubble.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8c42fa1d1d11fbd34e12039dde064626c378cb8f
--- /dev/null
+++ b/chrome/browser/ui/fullscreen_exit_bubble.cc
@@ -0,0 +1,88 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/fullscreen_exit_bubble.h"
+
+#include "chrome/app/chrome_command_ids.h"
+#include "ui/gfx/rect.h"
+
+const double FullscreenExitBubble::kOpacity = 0.7;
+const int FullscreenExitBubble::kPaddingPx = 8;
+const int FullscreenExitBubble::kInitialDelayMs = 2300;
+const int FullscreenExitBubble::kIdleTimeMs = 2300;
+const int FullscreenExitBubble::kPositionCheckHz = 10;
+const int FullscreenExitBubble::kSlideInRegionHeightPx = 4;
+const int FullscreenExitBubble::kSlideInDurationMs = 350;
+const int FullscreenExitBubble::kSlideOutDurationMs = 700;
+
+FullscreenExitBubble::FullscreenExitBubble(
+    CommandUpdater::CommandUpdaterDelegate* delegate)
+    : delegate_(delegate) {
+}
+
+FullscreenExitBubble::~FullscreenExitBubble() {
+}
+
+void FullscreenExitBubble::StartWatchingMouse() {
+  // Start the initial delay timer and begin watching the mouse.
+  initial_delay_.Start(base::TimeDelta::FromMilliseconds(kInitialDelayMs), this,
+                       &FullscreenExitBubble::CheckMousePosition);
+  gfx::Point cursor_pos = GetCursorScreenPoint();
+  last_mouse_pos_ = cursor_pos;
+  mouse_position_checker_.Start(
+      base::TimeDelta::FromMilliseconds(1000 / kPositionCheckHz), this,
+      &FullscreenExitBubble::CheckMousePosition);
+}
+
+void FullscreenExitBubble::CheckMousePosition() {
+  // Desired behavior:
+  //
+  // +------------+-----------------------------+------------+
+  // | _  _  _  _ | Exit full screen mode (F11) | _  _  _  _ |  Slide-in region
+  // | _  _  _  _ \_____________________________/ _  _  _  _ |  Neutral region
+  // |                                                       |  Slide-out region
+  // :                                                       :
+  //
+  // * If app is not active, we hide the popup.
+  // * If the mouse is offscreen or in the slide-out region, we hide the popup.
+  // * If the mouse goes idle, we hide the popup.
+  // * If the mouse is in the slide-in-region and not idle, we show the popup.
+  // * If the mouse is in the neutral region and not idle, and the popup is
+  //   currently sliding out, we show it again.  This facilitates users
+  //   correcting us if they try to mouse horizontally towards the popup and
+  //   unintentionally drop too low.
+  // * Otherwise, we do nothing, because the mouse is in the neutral region and
+  //   either the popup is hidden or the mouse is not idle, so we don't want to
+  //   change anything's state.
+
+  gfx::Point cursor_pos = GetCursorScreenPoint();
+
+  // Check to see whether the mouse is idle.
+  if (cursor_pos != last_mouse_pos_) {
+    // The mouse moved; reset the idle timer.
+    idle_timeout_.Stop();  // If the timer isn't running, this is a no-op.
+    idle_timeout_.Start(base::TimeDelta::FromMilliseconds(kIdleTimeMs), this,
+                        &FullscreenExitBubble::CheckMousePosition);
+  }
+  last_mouse_pos_ = cursor_pos;
+
+  if (!IsWindowActive() ||
+      !WindowContainsPoint(cursor_pos) ||
+      (cursor_pos.y() >= GetPopupRect(true).bottom()) ||
+      !idle_timeout_.IsRunning()) {
+    // The cursor is offscreen, in the slide-out region, or idle.
+    if (!initial_delay_.IsRunning()) {
+      Hide();
+    }
+  } else if ((cursor_pos.y() < kSlideInRegionHeightPx) ||
+             IsAnimating()) {
+    // The cursor is not idle, and either it's in the slide-in region or it's in
+    // the neutral region and we're sliding out.
+    Show();
+  }
+}
+
+void FullscreenExitBubble::ToggleFullscreen() {
+  delegate_->ExecuteCommand(IDC_FULLSCREEN);
+}