Revert of mash: Convert TrayBackgroundView to wm common types

ash/system/tray/tray_background_view.cc

Index: ash/system/tray/tray_background_view.cc
diff --git a/ash/system/tray/tray_background_view.cc b/ash/system/tray/tray_background_view.cc
new file mode 100644
index 0000000000000000000000000000000000000000..94180852c8b3e895789f02185909682438bf40aa
--- /dev/null
+++ b/ash/system/tray/tray_background_view.cc
@@ -0,0 +1,530 @@
+// Copyright (c) 2012 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 "ash/system/tray/tray_background_view.h"
+
+#include "ash/common/material_design/material_design_controller.h"
+#include "ash/common/shelf/shelf_constants.h"
+#include "ash/common/shelf/wm_shelf.h"
+#include "ash/common/shelf/wm_shelf_util.h"
+#include "ash/common/shell_window_ids.h"
+#include "ash/common/system/tray/tray_constants.h"
+#include "ash/screen_util.h"
+#include "ash/shell.h"
+#include "ash/system/status_area_widget.h"
+#include "ash/system/status_area_widget_delegate.h"
+#include "ash/system/tray/system_tray.h"
+#include "ash/system/tray/tray_event_filter.h"
+#include "ash/wm/window_animations.h"
+#include "base/command_line.h"
+#include "grit/ash_resources.h"
+#include "ui/accessibility/ax_view_state.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_event_dispatcher.h"
+#include "ui/base/nine_image_painter_factory.h"
+#include "ui/base/ui_base_switches_util.h"
+#include "ui/compositor/layer.h"
+#include "ui/compositor/layer_animation_element.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/events/event_constants.h"
+#include "ui/gfx/animation/tween.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/image/image_skia_operations.h"
+#include "ui/gfx/nine_image_painter.h"
+#include "ui/gfx/skia_util.h"
+#include "ui/gfx/transform.h"
+#include "ui/views/background.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/wm/core/window_animations.h"
+
+namespace {
+
+const int kAnimationDurationForPopupMs = 200;
+
+// Duration of opacity animation for visibility changes.
+const int kAnimationDurationForVisibilityMs = 250;
+
+// When becoming visible delay the animation so that StatusAreaWidgetDelegate
+// can animate sibling views out of the position to be occuped by the
+// TrayBackgroundView.
+const int kShowAnimationDelayMs = 100;
+
+}  // namespace
+
+using views::TrayBubbleView;
+
+namespace ash {
+
+// static
+const char TrayBackgroundView::kViewClassName[] = "tray/TrayBackgroundView";
+
+// Used to track when the anchor widget changes position on screen so that the
+// bubble position can be updated.
+class TrayBackgroundView::TrayWidgetObserver : public views::WidgetObserver {
+ public:
+  explicit TrayWidgetObserver(TrayBackgroundView* host)
+      : host_(host) {
+  }
+
+  void OnWidgetBoundsChanged(views::Widget* widget,
+                             const gfx::Rect& new_bounds) override {
+    host_->AnchorUpdated();
+  }
+
+  void OnWidgetVisibilityChanged(views::Widget* widget, bool visible) override {
+    host_->AnchorUpdated();
+  }
+
+ private:
+  TrayBackgroundView* host_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayWidgetObserver);
+};
+
+class TrayBackground : public views::Background {
+ public:
+  const static int kImageTypeDefault = 0;
+  const static int kImageTypeOnBlack = 1;
+  const static int kImageTypePressed = 2;
+  const static int kNumStates = 3;
+
+  const static int kImageHorizontal = 0;
+  const static int kImageVertical = 1;
+  const static int kNumOrientations = 2;
+
+  explicit TrayBackground(TrayBackgroundView* tray_background_view) :
+      tray_background_view_(tray_background_view) {
+  }
+
+  ~TrayBackground() override {}
+
+ private:
+  WmShelf* GetShelf() const {
+    return tray_background_view_->GetShelf();
+  }
+
+  void PaintMaterial(gfx::Canvas* canvas, views::View* view) const {
+    SkColor background_color = SK_ColorTRANSPARENT;
+    if (GetShelf()->GetBackgroundType() ==
+        ShelfBackgroundType::SHELF_BACKGROUND_DEFAULT) {
+      background_color = SkColorSetA(kShelfBaseColor,
+                                     GetShelfConstant(SHELF_BACKGROUND_ALPHA));
+    }
+
+    // TODO(bruthig|tdanderson): The background should be changed using a
+    // fade in/out animation.
+    const int kCornerRadius = 2;
+
+    SkPaint background_paint;
+    background_paint.setFlags(SkPaint::kAntiAlias_Flag);
+    background_paint.setColor(background_color);
+    canvas->DrawRoundRect(view->GetLocalBounds(), kCornerRadius,
+                          background_paint);
+
+    if (tray_background_view_->draw_background_as_active()) {
+      SkPaint highlight_paint;
+      highlight_paint.setFlags(SkPaint::kAntiAlias_Flag);
+      highlight_paint.setColor(kShelfButtonActivatedHighlightColor);
+      canvas->DrawRoundRect(view->GetLocalBounds(), kCornerRadius,
+                            highlight_paint);
+    }
+  }
+
+  void PaintNonMaterial(gfx::Canvas* canvas, views::View* view) const {
+    const int kGridSizeForPainter = 9;
+    const int kImages[kNumOrientations][kNumStates][kGridSizeForPainter] = {
+      { // Horizontal
+        IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ),
+        IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ_ONBLACK),
+        IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ_PRESSED),
+      },
+      { // Vertical
+        IMAGE_GRID_VERTICAL(IDR_AURA_TRAY_BG_VERTICAL),
+        IMAGE_GRID_VERTICAL(IDR_AURA_TRAY_BG_VERTICAL_ONBLACK),
+        IMAGE_GRID_VERTICAL(IDR_AURA_TRAY_BG_VERTICAL_PRESSED),
+      }
+    };
+
+    WmShelf* shelf = GetShelf();
+    const int orientation = IsHorizontalAlignment(shelf->GetAlignment())
+                                ? kImageHorizontal
+                                : kImageVertical;
+
+    int state = kImageTypeDefault;
+    if (tray_background_view_->draw_background_as_active())
+      state = kImageTypePressed;
+    else if (shelf->IsDimmed())
+      state = kImageTypeOnBlack;
+    else
+      state = kImageTypeDefault;
+
+    ui::CreateNineImagePainter(kImages[orientation][state])
+        ->Paint(canvas, view->GetLocalBounds());
+  }
+
+  // Overridden from views::Background.
+  void Paint(gfx::Canvas* canvas, views::View* view) const override {
+    if (MaterialDesignController::IsShelfMaterial())
+      PaintMaterial(canvas, view);
+    else
+      PaintNonMaterial(canvas, view);
+  }
+
+  // Reference to the TrayBackgroundView for which this is a background.
+  TrayBackgroundView* tray_background_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayBackground);
+};
+
+TrayBackgroundView::TrayContainer::TrayContainer(ShelfAlignment alignment)
+    : alignment_(alignment) {
+  UpdateLayout();
+}
+
+void TrayBackgroundView::TrayContainer::SetAlignment(ShelfAlignment alignment) {
+  if (alignment_ == alignment)
+    return;
+  alignment_ = alignment;
+  UpdateLayout();
+}
+
+gfx::Size TrayBackgroundView::TrayContainer::GetPreferredSize() const {
+  if (size_.IsEmpty())
+    return views::View::GetPreferredSize();
+  return size_;
+}
+
+void TrayBackgroundView::TrayContainer::ChildPreferredSizeChanged(
+    views::View* child) {
+  PreferredSizeChanged();
+}
+
+void TrayBackgroundView::TrayContainer::ChildVisibilityChanged(View* child) {
+  PreferredSizeChanged();
+}
+
+void TrayBackgroundView::TrayContainer::ViewHierarchyChanged(
+    const ViewHierarchyChangedDetails& details) {
+  if (details.parent == this)
+    PreferredSizeChanged();
+}
+
+// TODO(tdanderson): Adjust TrayContainer borders according to the material
+// design specs. See crbug.com/617295.
+void TrayBackgroundView::TrayContainer::UpdateLayout() {
+  // Adjust the size of status tray dark background by adding additional
+  // empty border.
+  views::BoxLayout::Orientation orientation =
+      IsHorizontalAlignment(alignment_) ? views::BoxLayout::kHorizontal
+                                        : views::BoxLayout::kVertical;
+  SetBorder(views::Border::CreateEmptyBorder(
+      kAdjustBackgroundPadding, kAdjustBackgroundPadding,
+      kAdjustBackgroundPadding, kAdjustBackgroundPadding));
+
+  views::BoxLayout* layout = new views::BoxLayout(orientation, 0, 0, 0);
+  layout->SetDefaultFlex(1);
+  views::View::SetLayoutManager(layout);
+  PreferredSizeChanged();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TrayBackgroundView
+
+TrayBackgroundView::TrayBackgroundView(StatusAreaWidget* status_area_widget)
+    : status_area_widget_(status_area_widget),
+      tray_container_(NULL),
+      shelf_alignment_(SHELF_ALIGNMENT_BOTTOM),
+      background_(NULL),
+      draw_background_as_active_(false),
+      widget_observer_(new TrayWidgetObserver(this)) {
+  DCHECK(status_area_widget->wm_shelf());
+  set_notify_enter_exit_on_child(true);
+
+  tray_container_ = new TrayContainer(shelf_alignment_);
+  SetContents(tray_container_);
+  tray_event_filter_.reset(new TrayEventFilter);
+
+  SetPaintToLayer(true);
+  layer()->SetFillsBoundsOpaquely(false);
+  // Start the tray items not visible, because visibility changes are animated.
+  views::View::SetVisible(false);
+}
+
+TrayBackgroundView::~TrayBackgroundView() {
+  if (GetWidget())
+    GetWidget()->RemoveObserver(widget_observer_.get());
+  StopObservingImplicitAnimations();
+}
+
+void TrayBackgroundView::Initialize() {
+  GetWidget()->AddObserver(widget_observer_.get());
+}
+
+// static
+void TrayBackgroundView::InitializeBubbleAnimations(
+    views::Widget* bubble_widget) {
+  aura::Window* window = bubble_widget->GetNativeWindow();
+  ::wm::SetWindowVisibilityAnimationType(
+      window, ::wm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
+  ::wm::SetWindowVisibilityAnimationTransition(window, ::wm::ANIMATE_HIDE);
+  ::wm::SetWindowVisibilityAnimationDuration(
+      window, base::TimeDelta::FromMilliseconds(kAnimationDurationForPopupMs));
+}
+
+void TrayBackgroundView::SetVisible(bool visible) {
+  if (visible == layer()->GetTargetVisibility())
+    return;
+
+  if (visible) {
+    // The alignment of the shelf can change while the TrayBackgroundView is
+    // hidden. Reset the offscreen transform so that the animation to becoming
+    // visible reflects the current layout.
+    HideTransformation();
+    // SetVisible(false) is defered until the animation for hiding is done.
+    // Otherwise the view is immediately hidden and the animation does not
+    // render.
+    views::View::SetVisible(true);
+    // If SetVisible(true) is called while animating to not visible, then
+    // views::View::SetVisible(true) is a no-op. When the previous animation
+    // ends layer->SetVisible(false) is called. To prevent this
+    // layer->SetVisible(true) immediately interrupts the animation of this
+    // property, and keeps the layer visible.
+    layer()->SetVisible(true);
+  }
+
+  ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
+  animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
+      kAnimationDurationForVisibilityMs));
+  animation.SetPreemptionStrategy(
+      ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
+
+  if (visible) {
+    animation.SetTweenType(gfx::Tween::EASE_OUT);
+    // Show is delayed so as to allow time for other children of
+    // StatusAreaWidget to begin animating to their new positions.
+    layer()->GetAnimator()->SchedulePauseForProperties(
+        base::TimeDelta::FromMilliseconds(kShowAnimationDelayMs),
+        ui::LayerAnimationElement::OPACITY |
+        ui::LayerAnimationElement::TRANSFORM);
+    layer()->SetOpacity(1.0f);
+    gfx::Transform transform;
+    transform.Translate(0.0f, 0.0f);
+    layer()->SetTransform(transform);
+  } else {
+    // Listen only to the hide animation. As we cannot turn off visibility
+    // until the animation is over.
+    animation.AddObserver(this);
+    animation.SetTweenType(gfx::Tween::EASE_IN);
+    layer()->SetOpacity(0.0f);
+    layer()->SetVisible(false);
+    HideTransformation();
+  }
+}
+
+const char* TrayBackgroundView::GetClassName() const {
+  return kViewClassName;
+}
+
+void TrayBackgroundView::ChildPreferredSizeChanged(views::View* child) {
+  PreferredSizeChanged();
+}
+
+void TrayBackgroundView::GetAccessibleState(ui::AXViewState* state) {
+  ActionableView::GetAccessibleState(state);
+  state->name = GetAccessibleNameForTray();
+}
+
+void TrayBackgroundView::AboutToRequestFocusFromTabTraversal(bool reverse) {
+  // Return focus to the login view. See crbug.com/120500.
+  views::View* v = GetNextFocusableView();
+  if (v)
+    v->AboutToRequestFocusFromTabTraversal(reverse);
+}
+
+bool TrayBackgroundView::PerformAction(const ui::Event& event) {
+  return false;
+}
+
+gfx::Rect TrayBackgroundView::GetFocusBounds() {
+  // The tray itself expands to the right and bottom edge of the screen to make
+  // sure clicking on the edges brings up the popup. However, the focus border
+  // should be only around the container.
+  return GetContentsBounds();
+}
+
+void TrayBackgroundView::OnGestureEvent(ui::GestureEvent* event) {
+  if (switches::IsTouchFeedbackEnabled()) {
+    if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
+      SetDrawBackgroundAsActive(true);
+    } else if (event->type() ==  ui::ET_GESTURE_SCROLL_BEGIN ||
+               event->type() ==  ui::ET_GESTURE_TAP_CANCEL) {
+      SetDrawBackgroundAsActive(false);
+    }
+  }
+  ActionableView::OnGestureEvent(event);
+}
+
+void TrayBackgroundView::UpdateBackground(int alpha) {
+  // The animator should never fire when the alternate shelf layout is used.
+  if (!background_ || draw_background_as_active_)
+    return;
+  SchedulePaint();
+}
+
+void TrayBackgroundView::SetContents(views::View* contents) {
+  SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
+  AddChildView(contents);
+}
+void TrayBackgroundView::SetContentsBackground() {
+  background_ = new TrayBackground(this);
+  tray_container_->set_background(background_);
+}
+
+WmShelf* TrayBackgroundView::GetShelf() {
+  return status_area_widget_->wm_shelf();
+}
+
+void TrayBackgroundView::SetShelfAlignment(ShelfAlignment alignment) {
+  shelf_alignment_ = alignment;
+  tray_container_->SetAlignment(alignment);
+}
+
+void TrayBackgroundView::OnImplicitAnimationsCompleted() {
+  // If there is another animation in the queue, the reverse animation was
+  // triggered before the completion of animating to invisible. Do not turn off
+  // the visibility so that the next animation may render. The value of
+  // layer()->GetTargetVisibility() can be incorrect if the hide animation was
+  // aborted to schedule an animation to become visible. As the new animation
+  // is not yet added to the queue. crbug.com/374236
+  if(layer()->GetAnimator()->is_animating() ||
+     layer()->GetTargetVisibility())
+    return;
+  views::View::SetVisible(false);
+}
+
+bool TrayBackgroundView::RequiresNotificationWhenAnimatorDestroyed() const {
+  // This is needed so that OnImplicitAnimationsCompleted() is called even upon
+  // destruction of the animator. This can occure when parallel animations
+  // caused by ScreenRotationAnimator end before the animations of
+  // TrayBackgroundView. This allows for a proper update to the visual state of
+  // the view. (crbug.com/476667)
+  return true;
+}
+
+void TrayBackgroundView::HideTransformation() {
+  gfx::Transform transform;
+  if (IsHorizontalAlignment(shelf_alignment_))
+    transform.Translate(width(), 0.0f);
+  else
+    transform.Translate(0.0f, height());
+  layer()->SetTransform(transform);
+}
+
+gfx::Rect TrayBackgroundView::GetBubbleAnchorRect(
+    views::Widget* anchor_widget,
+    TrayBubbleView::AnchorType anchor_type,
+    TrayBubbleView::AnchorAlignment anchor_alignment) const {
+  gfx::Rect rect;
+  if (anchor_widget && anchor_widget->IsVisible()) {
+    rect = anchor_widget->GetWindowBoundsInScreen();
+    if (anchor_type == TrayBubbleView::ANCHOR_TYPE_TRAY) {
+      if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_BOTTOM) {
+        bool rtl = base::i18n::IsRTL();
+        rect.Inset(
+            rtl ? kBubblePaddingHorizontalSide : 0,
+            kBubblePaddingHorizontalBottom,
+            rtl ? 0 : kBubblePaddingHorizontalSide,
+            0);
+      } else if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_LEFT) {
+        rect.Inset(0, 0, kBubblePaddingVerticalSide + 4,
+                   kBubblePaddingVerticalBottom);
+      } else if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_RIGHT) {
+        rect.Inset(kBubblePaddingVerticalSide, 0, 0,
+                   kBubblePaddingVerticalBottom);
+      } else {
+        // TODO(bruthig) May need to handle other ANCHOR_ALIGNMENT_ values.
+        // ie. ANCHOR_ALIGNMENT_TOP
+        DCHECK(false) << "Unhandled anchor alignment.";
+      }
+    } else if (anchor_type == TrayBubbleView::ANCHOR_TYPE_BUBBLE) {
+      // Invert the offsets to align with the bubble below.
+      // Note that with the alternate shelf layout the tips are not shown and
+      // the offsets for left and right alignment do not need to be applied.
+      int vertical_alignment = 0;
+      int horizontal_alignment = kBubblePaddingVerticalBottom;
+      if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_LEFT)
+        rect.Inset(vertical_alignment, 0, 0, horizontal_alignment);
+      else if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_RIGHT)
+        rect.Inset(0, 0, vertical_alignment, horizontal_alignment);
+    } else {
+      DCHECK(false) << "Unhandled anchor type.";
+    }
+  } else {
+    aura::Window* target_root = anchor_widget ?
+        anchor_widget->GetNativeView()->GetRootWindow() :
+        Shell::GetPrimaryRootWindow();
+    rect = target_root->bounds();
+    if (anchor_type == TrayBubbleView::ANCHOR_TYPE_TRAY) {
+      if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_BOTTOM) {
+        rect = gfx::Rect(
+            base::i18n::IsRTL() ?
+            kPaddingFromRightEdgeOfScreenBottomAlignment :
+            rect.width() - kPaddingFromRightEdgeOfScreenBottomAlignment,
+            rect.height() - kPaddingFromBottomOfScreenBottomAlignment,
+            0, 0);
+        rect = ScreenUtil::ConvertRectToScreen(target_root, rect);
+      } else if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_LEFT) {
+        rect = gfx::Rect(
+            kPaddingFromRightEdgeOfScreenBottomAlignment,
+            rect.height() - kPaddingFromBottomOfScreenBottomAlignment,
+            1, 1);
+        rect = ScreenUtil::ConvertRectToScreen(target_root, rect);
+      } else if (anchor_alignment == TrayBubbleView::ANCHOR_ALIGNMENT_RIGHT) {
+        rect = gfx::Rect(
+            rect.width() - kPaddingFromRightEdgeOfScreenBottomAlignment,
+            rect.height() - kPaddingFromBottomOfScreenBottomAlignment,
+            1, 1);
+        rect = ScreenUtil::ConvertRectToScreen(target_root, rect);
+      } else {
+        // TODO(bruthig) May need to handle other ANCHOR_ALIGNMENT_ values.
+        // ie. ANCHOR_ALIGNMENT_TOP
+        DCHECK(false) << "Unhandled anchor alignment.";
+      }
+    } else {
+      rect = gfx::Rect(
+          base::i18n::IsRTL() ?
+          kPaddingFromRightEdgeOfScreenBottomAlignment :
+          rect.width() - kPaddingFromRightEdgeOfScreenBottomAlignment,
+          rect.height() - kPaddingFromBottomOfScreenBottomAlignment,
+          0, 0);
+    }
+  }
+  return rect;
+}
+
+TrayBubbleView::AnchorAlignment TrayBackgroundView::GetAnchorAlignment() const {
+  if (shelf_alignment_ == SHELF_ALIGNMENT_LEFT)
+    return TrayBubbleView::ANCHOR_ALIGNMENT_LEFT;
+  if (shelf_alignment_ == SHELF_ALIGNMENT_RIGHT)
+    return TrayBubbleView::ANCHOR_ALIGNMENT_RIGHT;
+  return TrayBubbleView::ANCHOR_ALIGNMENT_BOTTOM;
+}
+
+void TrayBackgroundView::SetDrawBackgroundAsActive(bool visible) {
+  if (draw_background_as_active_ == visible)
+    return;
+  draw_background_as_active_ = visible;
+  if (!background_)
+    return;
+  SchedulePaint();
+}
+
+void TrayBackgroundView::UpdateBubbleViewArrow(
+    views::TrayBubbleView* bubble_view) {
+  // Nothing to do here.
+}
+
+}  // namespace ash