[cros, Aura] Refresh status area widget bounds on StatusAreaView layout.

ui/aura_shell/shelf_layout_controller.cc

-// 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 "ui/aura_shell/shelf_layout_controller.h"
-
-#include "ui/aura/desktop.h"
-#include "ui/aura/screen_aura.h"
-#include "ui/gfx/compositor/layer.h"
-#include "ui/gfx/compositor/layer_animator.h"
-#include "ui/views/widget/widget.h"
-
-namespace aura_shell {
-namespace internal {
-
-namespace {
-
-ui::Layer* GetLayer(views::Widget* widget) {
-  return widget->GetNativeView()->layer();
-}
-
-}  // namespace
-
-ShelfLayoutController::ShelfLayoutController(views::Widget* launcher,
-                                             views::Widget* status)
-    : animating_(false),
-      visible_(true),
-      max_height_(-1),
-      launcher_(launcher),
-      status_(status) {
-  gfx::Rect launcher_bounds = launcher->GetWindowScreenBounds();
-  gfx::Rect status_bounds = status->GetWindowScreenBounds();
-  max_height_ = std::max(launcher_bounds.height(), status_bounds.height());
-  GetLayer(launcher)->GetAnimator()->AddObserver(this);
-}
-
-ShelfLayoutController::~ShelfLayoutController() {
-  // Do not try to remove observer from layer as the Launcher is
-  // already deleted.
-}
-
-void ShelfLayoutController::LayoutShelf() {
-  StopAnimating();
-  TargetBounds target_bounds;
-  float target_opacity = visible_ ? 1.0f : 0.0f;
-  CalculateTargetBounds(visible_, &target_bounds);
-  GetLayer(launcher_)->SetOpacity(target_opacity);
-  GetLayer(status_)->SetOpacity(target_opacity);
-  launcher_->SetBounds(target_bounds.launcher_bounds);
-  status_->SetBounds(target_bounds.status_bounds);
-  aura::Desktop::GetInstance()->screen()->set_work_area_insets(
-      target_bounds.work_area_insets);
-}
-
-void ShelfLayoutController::SetVisible(bool visible) {
-  bool current_visibility = animating_ ? !visible_ : visible_;
-  if (visible == current_visibility)
-    return;  // Nothing changed.
-
-  StopAnimating();
-
-  TargetBounds target_bounds;
-  float target_opacity = visible ? 1.0f : 0.0f;
-  CalculateTargetBounds(visible, &target_bounds);
-  AnimateWidgetTo(launcher_, target_bounds.launcher_bounds, target_opacity);
-  AnimateWidgetTo(status_, target_bounds.status_bounds, target_opacity);
-  animating_ = true;
-  // |visible_| is updated once the animation completes.
-}
-
-void ShelfLayoutController::StopAnimating() {
-  if (animating_) {
-    animating_ = false;
-    visible_ = !visible_;
-  }
-  GetLayer(launcher_)->GetAnimator()->StopAnimating();
-}
-
-void ShelfLayoutController::CalculateTargetBounds(bool visible,
-                                                  TargetBounds* target_bounds) {
-  const gfx::Rect& available_bounds(aura::Desktop::GetInstance()->bounds());
-  int y = available_bounds.bottom() - (visible ? max_height_ : 0);
-  gfx::Rect status_bounds(status_->GetWindowScreenBounds());
-  target_bounds->status_bounds = gfx::Rect(
-      available_bounds.right() - status_bounds.width(),
-      y + (max_height_ - status_bounds.height()) / 2,
-      status_bounds.width(), status_bounds.height());
-  gfx::Rect launcher_bounds(launcher_->GetWindowScreenBounds());
-  target_bounds->launcher_bounds = gfx::Rect(
-      available_bounds.x(), y + (max_height_ - launcher_bounds.height()) / 2,
-      available_bounds.width() - status_bounds.width(),
-      launcher_bounds.height());
-  if (visible)
-    target_bounds->work_area_insets = gfx::Insets(0, 0, max_height_, 0);
-}
-
-void ShelfLayoutController::AnimateWidgetTo(views::Widget* widget,
-                                            const gfx::Rect& target_bounds,
-                                            float target_opacity) {
-  ui::Layer* layer = GetLayer(widget);
-  ui::LayerAnimator::ScopedSettings animation_setter(layer->GetAnimator());
-  widget->SetBounds(target_bounds);
-  layer->SetOpacity(target_opacity);
-}
-
-void ShelfLayoutController::OnLayerAnimationEnded(
-    const ui::LayerAnimationSequence* sequence) {
-  if (!animating_)
-    return;
-  animating_ = false;
-  visible_ = !visible_;
-  TargetBounds target_bounds;
-  CalculateTargetBounds(visible_, &target_bounds);
-  aura::Desktop::GetInstance()->screen()->set_work_area_insets(
-      target_bounds.work_area_insets);
-}
-
-}  // internal
-}  // aura_shell