aura: Fix launcher tooltips:

ui/app_list/app_list_bubble_border.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 "ui/app_list/app_list_bubble_border.h"
 
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/skia_util.h"
 
 namespace {
 
-// Bubble border corner radius.
-const int kCornerRadius = 2;
-
-// Arrow width and height.
-const int kArrowHeight = 10;
-const int kArrowWidth = 20;
-
-// Bubble border color and width.
-const SkColor kBorderColor = SkColorSetARGB(0x26, 0, 0, 0);
-const int kBorderSize = 1;
-
 const SkColor kSearchBoxBackground = SK_ColorWHITE;
 const SkColor kContentsBackground = SkColorSetRGB(0xFC, 0xFC, 0xFC);
 
 // Colors and sizes of top separator between searchbox and grid view.
 const SkColor kTopSeparatorColor = SkColorSetRGB(0xF0, 0xF0, 0xF0);
 const int kTopSeparatorSize = 1;
 
-// Builds a bubble shape for given |bounds|.
-void BuildShape(const gfx::Rect& bounds,
-                views::BubbleBorder::ArrowLocation arrow_location,
-                SkScalar arrow_offset,
-                SkScalar padding,
-                SkPath* path) {
-  const SkScalar corner_radius = SkIntToScalar(kCornerRadius);
-
-  const SkScalar left = SkIntToScalar(bounds.x()) + padding;
-  const SkScalar top = SkIntToScalar(bounds.y()) + padding;
-  const SkScalar right = SkIntToScalar(bounds.right()) - padding;
-  const SkScalar bottom = SkIntToScalar(bounds.bottom()) - padding;
-
-  const SkScalar center_x = SkIntToScalar((bounds.x() + bounds.right()) / 2);
-  const SkScalar center_y = SkIntToScalar((bounds.y() + bounds.bottom()) / 2);
-
-  const SkScalar half_arrow_width = (SkIntToScalar(kArrowWidth) - padding) / 2;
-  const SkScalar arrow_height = SkIntToScalar(kArrowHeight) - padding;
-
-  path->reset();
-  path->incReserve(12);
-
-  switch (arrow_location) {
-    case views::BubbleBorder::TOP_LEFT:
-    case views::BubbleBorder::TOP_RIGHT:
-      path->moveTo(center_x, bottom);
-      path->arcTo(right, bottom, right, center_y, corner_radius);
-      path->arcTo(right, top, center_x  - half_arrow_width, top,
-                  corner_radius);
-      path->lineTo(center_x + arrow_offset + half_arrow_width, top);
-      path->lineTo(center_x + arrow_offset, top - arrow_height);
-      path->lineTo(center_x + arrow_offset - half_arrow_width, top);
-      path->arcTo(left, top, left, center_y, corner_radius);
-      path->arcTo(left, bottom, center_x, bottom, corner_radius);
-      break;
-    case views::BubbleBorder::BOTTOM_LEFT:
-    case views::BubbleBorder::BOTTOM_RIGHT:
-      path->moveTo(center_x, top);
-      path->arcTo(left, top, left, center_y, corner_radius);
-      path->arcTo(left, bottom, center_x  - half_arrow_width, bottom,
-                  corner_radius);
-      path->lineTo(center_x + arrow_offset - half_arrow_width, bottom);
-      path->lineTo(center_x + arrow_offset, bottom + arrow_height);
-      path->lineTo(center_x + arrow_offset + half_arrow_width, bottom);
-      path->arcTo(right, bottom, right, center_y, corner_radius);
-      path->arcTo(right, top, center_x, top, corner_radius);
-      break;
-    case views::BubbleBorder::LEFT_TOP:
-    case views::BubbleBorder::LEFT_BOTTOM:
-      path->moveTo(right, center_y);
-      path->arcTo(right, top, center_x, top, corner_radius);
-      path->arcTo(left, top, left, center_y + arrow_offset - half_arrow_width,
-                  corner_radius);
-      path->lineTo(left, center_y + arrow_offset - half_arrow_width);
-      path->lineTo(left - arrow_height, center_y + arrow_offset);
-      path->lineTo(left, center_y + arrow_offset + half_arrow_width);
-      path->arcTo(left, bottom, center_x, bottom, corner_radius);
-      path->arcTo(right, bottom, right, center_y, corner_radius);
-      break;
-    case views::BubbleBorder::RIGHT_TOP:
-    case views::BubbleBorder::RIGHT_BOTTOM:
-      path->moveTo(left, center_y);
-      path->arcTo(left, bottom, center_x, bottom, corner_radius);
-      path->arcTo(right, bottom,
-                  right, center_y + arrow_offset + half_arrow_width,
-                  corner_radius);
-      path->lineTo(right, center_y + arrow_offset + half_arrow_width);
-      path->lineTo(right + arrow_height, center_y + arrow_offset);
-      path->lineTo(right, center_y + arrow_offset - half_arrow_width);
-      path->arcTo(right, top, center_x, top, corner_radius);
-      path->arcTo(left, top, left, center_y, corner_radius);
-      break;
-    default:
-      // No arrows.
-      path->addRoundRect(gfx::RectToSkRect(bounds),
-                         corner_radius,
-                         corner_radius);
-      break;
-  }
-
-  path->close();
-}
-
 }  // namespace
 
 namespace app_list {
 
 AppListBubbleBorder::AppListBubbleBorder(views::View* app_list_view,
                                          views::View* search_box_view)
-    : views::BubbleBorder(views::BubbleBorder::BOTTOM_RIGHT,
-                          views::BubbleBorder::NO_SHADOW),
+    : views::ImagelessBubbleBorder(views::BubbleBorder::BOTTOM_RIGHT),
       app_list_view_(app_list_view),
       search_box_view_(search_box_view) {
-  const gfx::ShadowValue kShadows[] = {
-    // Offset (0, 5), blur=30, color=0.36 black
-    gfx::ShadowValue(gfx::Point(0, 5), 30, SkColorSetARGB(0x72, 0, 0, 0)),
-  };
-  shadows_.assign(kShadows, kShadows + arraysize(kShadows));
 }
 
 AppListBubbleBorder::~AppListBubbleBorder() {
 }
 
-bool AppListBubbleBorder::ArrowAtTopOrBottom() const {
-  return arrow_location() == views::BubbleBorder::TOP_LEFT ||
-      arrow_location() == views::BubbleBorder::TOP_RIGHT ||
-      arrow_location() == views::BubbleBorder::BOTTOM_LEFT ||
-      arrow_location() == views::BubbleBorder::BOTTOM_RIGHT;
-}
-
-bool AppListBubbleBorder::ArrowOnLeftOrRight() const {
-  return arrow_location() == views::BubbleBorder::LEFT_TOP ||
-      arrow_location() == views::BubbleBorder::LEFT_BOTTOM ||
-      arrow_location() == views::BubbleBorder::RIGHT_TOP ||
-      arrow_location() == views::BubbleBorder::RIGHT_BOTTOM;
-}
-
-void AppListBubbleBorder::GetMask(const gfx::Rect& bounds,
-                                  gfx::Path* mask) const {
-  gfx::Insets insets;
-  GetInsets(&insets);
-
-  gfx::Rect content_bounds(bounds);
-  content_bounds.Inset(insets);
-
-  BuildShape(content_bounds,
-             arrow_location(),
-             SkIntToScalar(GetArrowOffset()),
-             SkIntToScalar(kBorderSize),
-             mask);
-}
-
-int AppListBubbleBorder::GetArrowOffset() const {
-  if (ArrowAtTopOrBottom()) {
-    // Picks x offset and moves bubble arrow in the opposite direction.
-    // i.e. If bubble bounds is moved to right (positive offset), we need to
-    // move arrow to left so that it points to the same position.
-    return -offset_.x();
-  } else if (ArrowOnLeftOrRight()) {
-    // Picks y offset and moves bubble arrow in the opposite direction.
-    return -offset_.y();
-  }
-
-  // Other style does not have an arrow, so return 0.
-  return 0;
-}
-
 void AppListBubbleBorder::PaintBackground(gfx::Canvas* canvas,
                                           const gfx::Rect& bounds) const {
   const gfx::Rect search_box_view_bounds =
       app_list_view_->ConvertRectToWidget(search_box_view_->bounds());
   gfx::Rect search_box_rect(bounds.x(),
                             bounds.y(),
                             bounds.width(),
                             search_box_view_bounds.bottom() - bounds.y());
 
   SkPaint paint;
   paint.setStyle(SkPaint::kFill_Style);
   paint.setColor(kSearchBoxBackground);
   canvas->DrawRect(search_box_rect, paint);
 
   gfx::Rect seperator_rect(search_box_rect);
   seperator_rect.set_y(seperator_rect.bottom());
   seperator_rect.set_height(kTopSeparatorSize);
   canvas->FillRect(seperator_rect, kTopSeparatorColor);
 
   gfx::Rect contents_rect(bounds.x(),
                           seperator_rect.bottom(),
                           bounds.width(),
                           bounds.bottom() - seperator_rect.bottom());
 
   paint.setColor(kContentsBackground);
   canvas->DrawRect(contents_rect, paint);
 }
 
-void AppListBubbleBorder::GetInsets(gfx::Insets* insets) const {
-  // Negate to change from outer margin to inner padding.
-  gfx::Insets shadow_padding(-gfx::ShadowValue::GetMargin(shadows_));
-
-  if (arrow_location() == views::BubbleBorder::TOP_LEFT ||
-      arrow_location() == views::BubbleBorder::TOP_RIGHT) {
-    // Arrow at top.
-    insets->Set(shadow_padding.top() + kArrowHeight,
-                shadow_padding.left(),
-                shadow_padding.bottom(),
-                shadow_padding.right());
-  } else if (arrow_location() == views::BubbleBorder::BOTTOM_LEFT ||
-      arrow_location() == views::BubbleBorder::BOTTOM_RIGHT) {
-    // Arrow at bottom.
-    insets->Set(shadow_padding.top(),
-                shadow_padding.left(),
-                shadow_padding.bottom() + kArrowHeight,
-                shadow_padding.right());
-  } else if (arrow_location() == views::BubbleBorder::LEFT_TOP ||
-      arrow_location() == views::BubbleBorder::LEFT_BOTTOM) {
-    // Arrow on left.
-    insets->Set(shadow_padding.top(),
-                shadow_padding.left() + kArrowHeight,
-                shadow_padding.bottom(),
-                shadow_padding.right());
-  } else if (arrow_location() == views::BubbleBorder::RIGHT_TOP ||
-      arrow_location() == views::BubbleBorder::RIGHT_BOTTOM) {
-    // Arrow on right.
-    insets->Set(shadow_padding.top(),
-                shadow_padding.left(),
-                shadow_padding.bottom(),
-                shadow_padding.right() + kArrowHeight);
-  }
-}
-
-gfx::Rect AppListBubbleBorder::GetBounds(
-    const gfx::Rect& position_relative_to,
-    const gfx::Size& contents_size) const {
-  gfx::Size border_size(contents_size);
-  gfx::Insets insets;
-  GetInsets(&insets);
-  border_size.Enlarge(insets.width(), insets.height());
-
-  // Negate to change from outer margin to inner padding.
-  gfx::Insets shadow_padding(-gfx::ShadowValue::GetMargin(shadows_));
-
-  // Anchor center that arrow aligns with.
-  const int anchor_center_x =
-      (position_relative_to.x() + position_relative_to.right()) / 2;
-  const int anchor_center_y =
-      (position_relative_to.y() + position_relative_to.bottom()) / 2;
-
-  // Arrow position relative to top-left of bubble. |arrow_tip_x| is used for
-  // arrow at the top or bottom and |arrow_tip_y| is used for arrow on left or
-  // right. The 1px offset for |arrow_tip_y| is needed because the app list grid
-  // icon start at a different position (1px earlier) compared with bottom
-  // launcher bar.
-  // TODO(xiyuan): Remove 1px offset when app list icon image asset is updated.
-  int arrow_tip_x = insets.left() + contents_size.width() / 2 +
-      GetArrowOffset();
-  int arrow_tip_y = insets.top() + contents_size.height() / 2 +
-      GetArrowOffset() + 1;
-
-  if (arrow_location() == views::BubbleBorder::TOP_LEFT ||
-      arrow_location() == views::BubbleBorder::TOP_RIGHT) {
-    // Arrow at top.
-    return gfx::Rect(
-        gfx::Point(anchor_center_x - arrow_tip_x,
-                   position_relative_to.bottom() - shadow_padding.top() -
-                       kArrowHeight),
-        border_size);
-  } else if (arrow_location() == views::BubbleBorder::BOTTOM_LEFT ||
-      arrow_location() == views::BubbleBorder::BOTTOM_RIGHT) {
-    // Arrow at bottom.
-    return gfx::Rect(
-        gfx::Point(anchor_center_x - arrow_tip_x,
-                   position_relative_to.y() - border_size.height() +
-                       shadow_padding.bottom() + kArrowHeight),
-        border_size);
-  } else if (arrow_location() == views::BubbleBorder::LEFT_TOP ||
-      arrow_location() == views::BubbleBorder::LEFT_BOTTOM) {
-    // Arrow on left.
-    return gfx::Rect(
-        gfx::Point(position_relative_to.right() - shadow_padding.left() -
-                       kArrowHeight,
-                   anchor_center_y - arrow_tip_y),
-        border_size);
-  } else if (arrow_location() == views::BubbleBorder::RIGHT_TOP ||
-      arrow_location() == views::BubbleBorder::RIGHT_BOTTOM) {
-    // Arrow on right.
-    return gfx::Rect(
-        gfx::Point(position_relative_to.x() - border_size.width() +
-                       shadow_padding.right() + kArrowHeight,
-                   anchor_center_y - arrow_tip_y),
-        border_size);
-  }
-
-  // No arrow bubble, center align with anchor.
-  return position_relative_to.Center(border_size);
-}
-
-void AppListBubbleBorder::Paint(const views::View& view,
-                                gfx::Canvas* canvas) const {
-  gfx::Insets insets;
-  GetInsets(&insets);
-
-  gfx::Rect content_bounds = view.bounds();
-  content_bounds.Inset(insets);
-
-  SkPath path;
-  // Pads with 0.5 pixel since anti alias is used.
-  BuildShape(content_bounds,
-             arrow_location(),
-             SkIntToScalar(GetArrowOffset()),
-             SkDoubleToScalar(0.5),
-             &path);
-
-  // Draw border and shadow. Note fill is needed to generate enough shadow.
-  SkPaint paint;
-  paint.setAntiAlias(true);
-  paint.setStyle(SkPaint::kStrokeAndFill_Style);
-  paint.setStrokeWidth(SkIntToScalar(kBorderSize));
-  paint.setColor(kBorderColor);
-  SkSafeUnref(paint.setLooper(gfx::CreateShadowDrawLooper(shadows_)));
-  canvas->DrawPath(path, paint);
-
-  // Pads with kBoprderSize pixels to leave space for border lines.
-  BuildShape(content_bounds,
-             arrow_location(),
-             SkIntToScalar(GetArrowOffset()),
-             SkIntToScalar(kBorderSize),
-             &path);
-  canvas->Save();
-  canvas->ClipPath(path);
-
-  // Use full bounds so that arrow is also painted.
-  const gfx::Rect& bounds = view.bounds();
-  PaintBackground(canvas, bounds);
-
-  canvas->Restore();
-}
-
 }  // namespace app_list