Add WebNotificationTray

ash/system/tray/system_tray_bubble_view.cc

+// 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/system_tray_bubble_view.h"
+
+#include "ash/shell.h"
+#include "ash/shell_window_ids.h"
+#include "ash/system/tray/tray_constants.h"
+#include "ash/wm/shelf_layout_manager.h"
+#include "grit/ash_strings.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkPath.h"
+#include "third_party/skia/include/effects/SkBlurImageFilter.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/screen.h"
+#include "ui/views/bubble/bubble_frame_view.h"
+#include "ui/views/layout/box_layout.h"
+
+namespace ash {
+
+namespace {
+
+const int kShadowThickness = 4;
+const int kBottomLineHeight = 1;
+const int kSystemTrayBubbleHorizontalInset = 1;
+const int kSystemTrayBubbleVerticalInset = 1;
+
+const int kArrowHeight = 10;
+const int kArrowWidth = 20;
+const int kArrowPaddingFromRight = 20;
+const int kArrowPaddingFromBottom = 17;
+
+const SkColor kShadowColor = SkColorSetARGB(0xff, 0, 0, 0);
+
+void DrawBlurredShadowAroundView(gfx::Canvas* canvas,
+                                 int top,
+                                 int bottom,
+                                 int width,
+                                 const gfx::Insets& inset) {
+  SkPath path;
+  path.incReserve(4);
+  path.moveTo(SkIntToScalar(inset.left() + kShadowThickness),
+              SkIntToScalar(top + kShadowThickness + 1));
+  path.lineTo(SkIntToScalar(inset.left() + kShadowThickness),
+              SkIntToScalar(bottom));
+  path.lineTo(SkIntToScalar(width),
+              SkIntToScalar(bottom));
+  path.lineTo(SkIntToScalar(width),
+              SkIntToScalar(top + kShadowThickness + 1));
+
+  SkPaint paint;
+  paint.setColor(kShadowColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
+  paint.setStrokeWidth(SkIntToScalar(3));
+  paint.setImageFilter(new SkBlurImageFilter(
+      SkIntToScalar(3), SkIntToScalar(3)))->unref();
+  canvas->sk_canvas()->drawPath(path, paint);
+}
+
+class SystemTrayBubbleBorder : public views::BubbleBorder {
+ public:
+  SystemTrayBubbleBorder(views::View* owner,
+                         views::BubbleBorder::ArrowLocation arrow_location,
+                         int arrow_offset)
+      : views::BubbleBorder(arrow_location,
+                            views::BubbleBorder::NO_SHADOW),
+        owner_(owner),
+        arrow_offset_(arrow_offset) {
+    set_alignment(views::BubbleBorder::ALIGN_EDGE_TO_ANCHOR_EDGE);
+  }
+
+  virtual ~SystemTrayBubbleBorder() {}
+
+ private:
+  // Overridden from views::BubbleBorder.
+  // Override views::BubbleBorder to set the bubble on top of the anchor when
+  // it has no arrow.
+  virtual gfx::Rect GetBounds(const gfx::Rect& position_relative_to,
+                              const gfx::Size& contents_size) const OVERRIDE {
+    if (arrow_location() != NONE) {
+      return views::BubbleBorder::GetBounds(position_relative_to,
+                                            contents_size);
+    }
+
+    gfx::Size border_size(contents_size);
+    gfx::Insets insets;
+    GetInsets(&insets);
+    border_size.Enlarge(insets.width(), insets.height());
+
+    const int kArrowOverlap = 3;
+    int x = position_relative_to.x() +
+            position_relative_to.width() / 2 - border_size.width() / 2;
+    // Position the bubble on top of the anchor.
+    int y = position_relative_to.y() +
+            kArrowOverlap - border_size.height();
+    return gfx::Rect(x, y, border_size.width(), border_size.height());
+  }
+
+  // Overridden from views::Border.
+  virtual void Paint(const views::View& view,
+                     gfx::Canvas* canvas) const OVERRIDE {
+    gfx::Insets inset;
+    GetInsets(&inset);
+    DrawBlurredShadowAroundView(canvas, 0, owner_->height(), owner_->width(),
+        inset);
+
+    // Draw the bottom line.
+    int y = owner_->height() + 1;
+    canvas->FillRect(gfx::Rect(inset.left(), y, owner_->width(),
+                               kBottomLineHeight), kBorderDarkColor);
+
+    if (!Shell::GetInstance()->shelf()->IsVisible() ||
+        arrow_location() == views::BubbleBorder::NONE)
+      return;
+
+    // Draw the arrow after drawing child borders, so that the arrow can cover
+    // the its overlap section with child border.
+    SkPath path;
+    path.incReserve(4);
+    if (arrow_location() == views::BubbleBorder::BOTTOM_RIGHT) {
+      int tip_x = base::i18n::IsRTL() ? arrow_offset_ :
+          owner_->width() - arrow_offset_;
+      tip_x = std::min(std::max(kArrowWidth / 2, tip_x),
+                       owner_->width() - kArrowWidth / 2);
+      int left_base_x = tip_x - kArrowWidth / 2;
+      int left_base_y = y;
+      int tip_y = left_base_y + kArrowHeight;
+      path.moveTo(SkIntToScalar(left_base_x), SkIntToScalar(left_base_y));
+      path.lineTo(SkIntToScalar(tip_x), SkIntToScalar(tip_y));
+      path.lineTo(SkIntToScalar(left_base_x + kArrowWidth),
+                  SkIntToScalar(left_base_y));
+    } else {
+      int tip_y = y - arrow_offset_;
+      tip_y = std::min(std::max(kArrowWidth / 2, tip_y),
+                       owner_->height() - kArrowWidth / 2);
+      int top_base_y = tip_y - kArrowWidth / 2;
+      int top_base_x, tip_x;
+      if (arrow_location() == views::BubbleBorder::LEFT_BOTTOM) {
+        top_base_x = inset.left() + kSystemTrayBubbleHorizontalInset;
+        tip_x = top_base_x - kArrowHeight;
+      } else {
+        DCHECK(arrow_location() == views::BubbleBorder::RIGHT_BOTTOM);
+        top_base_x = inset.left() + owner_->width() -
+            kSystemTrayBubbleHorizontalInset;
+        tip_x = top_base_x + kArrowHeight;
+      }
+      path.moveTo(SkIntToScalar(top_base_x), SkIntToScalar(top_base_y));
+      path.lineTo(SkIntToScalar(tip_x), SkIntToScalar(tip_y));
+      path.lineTo(SkIntToScalar(top_base_x),
+                  SkIntToScalar(top_base_y + kArrowWidth));
+    }
+
+    SkPaint paint;
+    paint.setStyle(SkPaint::kFill_Style);
+    paint.setColor(kHeaderBackgroundColorDark);
+    canvas->DrawPath(path, paint);
+
+    // Now draw the arrow border.
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setColor(kBorderDarkColor);
+    canvas->DrawPath(path, paint);
+
+  }
+
+  views::View* owner_;
+  const int arrow_offset_;
+
+  DISALLOW_COPY_AND_ASSIGN(SystemTrayBubbleBorder);
+};
+
+}  // namespace
+
+namespace internal {
+
+SystemTrayBubbleView::SystemTrayBubbleView(
+    views::View* anchor,
+    views::BubbleBorder::ArrowLocation arrow_location,
+    Host* host,
+    bool can_activate)
+    : views::BubbleDelegateView(anchor, arrow_location),
+      host_(host),
+      can_activate_(can_activate),
+      max_height_(0),
+      bubble_width_(kTrayPopupWidth) {
+  set_margin(0);
+  set_parent_window(ash::Shell::GetInstance()->GetContainer(
+      ash::internal::kShellWindowId_SettingBubbleContainer));
+  set_notify_enter_exit_on_child(true);
+  SetPaintToLayer(true);
+  SetFillsBoundsOpaquely(true);
+}
+
+SystemTrayBubbleView::~SystemTrayBubbleView() {
+  // Inform host items (models) that their views are being destroyed.
+  if (host_)
+    host_->BubbleViewDestroyed();
+}
+
+void SystemTrayBubbleView::SetBubbleBorder(int arrow_offset) {
+  SystemTrayBubbleBorder* bubble_border = new SystemTrayBubbleBorder(
+      this, arrow_location(), arrow_offset);
+  GetBubbleFrameView()->SetBubbleBorder(bubble_border);
+  // Recalculate with new border.
+  SizeToContents();
+}
+
+void SystemTrayBubbleView::UpdateAnchor() {
+  SizeToContents();
+  GetWidget()->GetRootView()->SchedulePaint();
+}
+
+void SystemTrayBubbleView::SetMaxHeight(int height) {
+  max_height_ = height;
+  if (GetWidget())
+    SizeToContents();
+}
+
+void SystemTrayBubbleView::Init() {
+  views::BoxLayout* layout =
+      new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0);
+  layout->set_spread_blank_space(true);
+  SetLayoutManager(layout);
+  set_background(NULL);
+}
+
+gfx::Rect SystemTrayBubbleView::GetAnchorRect() {
+  gfx::Rect rect;
+  if (host_)
+    rect = host_->GetAnchorRect();
+  // TODO(jennyz): May need to add left/right alignment in the following code.
+  if (rect.IsEmpty()) {
+    rect = gfx::Screen::GetPrimaryMonitor().bounds();
+    rect = gfx::Rect(
+        base::i18n::IsRTL() ? kPaddingFromRightEdgeOfScreenBottomAlignment :
+            rect.width() - kPaddingFromRightEdgeOfScreenBottomAlignment,
+        rect.height() - kPaddingFromBottomOfScreenBottomAlignment,
+        0, 0);
+  }
+  return rect;
+}
+
+gfx::Rect SystemTrayBubbleView::GetBubbleBounds() {
+  // Same as BubbleDelegateView implementation, but don't try mirroring.
+  return GetBubbleFrameView()->GetUpdatedWindowBounds(GetAnchorRect(),
+      GetPreferredSize(), false /*try_mirroring_arrow*/);
+}
+
+bool SystemTrayBubbleView::CanActivate() const {
+  return can_activate_;
+}
+
+gfx::Size SystemTrayBubbleView::GetPreferredSize() {
+  gfx::Size size = views::BubbleDelegateView::GetPreferredSize();
+  int height = size.height();
+  if (max_height_ != 0 && height > max_height_)
+    height = max_height_;
+  return gfx::Size(bubble_width_, height);
+}
+
+void SystemTrayBubbleView::OnMouseEntered(const views::MouseEvent& event) {
+  if (host_)
+    host_->OnMouseEnteredView();
+}
+
+void SystemTrayBubbleView::OnMouseExited(const views::MouseEvent& event) {
+  if (host_)
+    host_->OnMouseExitedView();
+}
+
+void SystemTrayBubbleView::GetAccessibleState(ui::AccessibleViewState* state) {
+  if (can_activate_) {
+    state->role = ui::AccessibilityTypes::ROLE_WINDOW;
+    state->name = l10n_util::GetStringUTF16(
+        IDS_ASH_STATUS_TRAY_ACCESSIBLE_NAME);
+  }
+}
+
+void SystemTrayBubbleView::ChildPreferredSizeChanged(View* child) {
+  SizeToContents();
+}
+
+void SystemTrayBubbleView::ViewHierarchyChanged(bool is_add,
+                                                views::View* parent,
+                                                views::View* child) {
+  if (is_add && child == this) {
+    parent->SetPaintToLayer(true);
+    parent->SetFillsBoundsOpaquely(true);
+    parent->layer()->SetMasksToBounds(true);
+  }
+}
+
+}  // namespace internal
+}  // namespace ash