| // 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/views/bubble/bubble_border.h" |
| |
| #include <algorithm> |
| |
| #include "base/logging.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "grit/ui_resources.h" |
| #include "ui/base/resource/resource_bundle.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/image/image_skia.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/gfx/skia_util.h" |
| #include "ui/views/painter.h" |
| #include "ui/views/view.h" |
| |
| namespace views { |
| |
| namespace internal { |
| |
| // A helper that combines each border image-set painter with arrows and metrics. |
| struct BorderImages { |
| BorderImages(const int border_image_ids[], |
| const int arrow_image_ids[], |
| int border_interior_thickness, |
| int arrow_interior_thickness, |
| int corner_radius); |
| |
| scoped_ptr<Painter> border_painter; |
| gfx::ImageSkia left_arrow; |
| gfx::ImageSkia top_arrow; |
| gfx::ImageSkia right_arrow; |
| gfx::ImageSkia bottom_arrow; |
| |
| // The thickness of border and arrow images and their interior areas. |
| // Thickness is the width of left/right and the height of top/bottom images. |
| // The interior is measured without including stroke or shadow pixels. |
| int border_thickness; |
| int border_interior_thickness; |
| int arrow_thickness; |
| int arrow_interior_thickness; |
| // The corner radius of the bubble's rounded-rect interior area. |
| int corner_radius; |
| }; |
| |
| BorderImages::BorderImages(const int border_image_ids[], |
| const int arrow_image_ids[], |
| int border_interior_thickness, |
| int arrow_interior_thickness, |
| int corner_radius) |
| : border_painter(Painter::CreateImageGridPainter(border_image_ids)), |
| border_thickness(0), |
| border_interior_thickness(border_interior_thickness), |
| arrow_thickness(0), |
| arrow_interior_thickness(arrow_interior_thickness), |
| corner_radius(corner_radius) { |
| ResourceBundle& rb = ResourceBundle::GetSharedInstance(); |
| border_thickness = rb.GetImageSkiaNamed(border_image_ids[0])->width(); |
| if (arrow_image_ids[0] != 0) { |
| left_arrow = *rb.GetImageSkiaNamed(arrow_image_ids[0]); |
| top_arrow = *rb.GetImageSkiaNamed(arrow_image_ids[1]); |
| right_arrow = *rb.GetImageSkiaNamed(arrow_image_ids[2]); |
| bottom_arrow = *rb.GetImageSkiaNamed(arrow_image_ids[3]); |
| arrow_thickness = top_arrow.height(); |
| } |
| } |
| |
| } // namespace internal |
| |
| namespace { |
| |
| // The border and arrow stroke size used in image assets, in pixels. |
| const int kStroke = 1; |
| |
| // Bubble border and arrow image resource ids. They don't use the IMAGE_GRID |
| // macro because there is no center image. |
| const int kNoShadowImages[] = { |
| IDR_BUBBLE_TL, IDR_BUBBLE_T, IDR_BUBBLE_TR, |
| IDR_BUBBLE_L, 0, IDR_BUBBLE_R, |
| IDR_BUBBLE_BL, IDR_BUBBLE_B, IDR_BUBBLE_BR }; |
| const int kNoShadowArrows[] = { |
| IDR_BUBBLE_L_ARROW, IDR_BUBBLE_T_ARROW, |
| IDR_BUBBLE_R_ARROW, IDR_BUBBLE_B_ARROW, }; |
| |
| const int kBigShadowImages[] = { |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_TOP_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_TOP, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_TOP_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_LEFT, |
| 0, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_BOTTOM_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_BOTTOM, |
| IDR_WINDOW_BUBBLE_SHADOW_BIG_BOTTOM_RIGHT }; |
| const int kBigShadowArrows[] = { |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_BIG_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_BIG_TOP, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_BIG_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_BIG_BOTTOM }; |
| |
| const int kSmallShadowImages[] = { |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_TOP_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_LEFT, |
| 0, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM, |
| IDR_WINDOW_BUBBLE_SHADOW_SMALL_BOTTOM_RIGHT }; |
| const int kSmallShadowArrows[] = { |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_LEFT, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_TOP, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_RIGHT, |
| IDR_WINDOW_BUBBLE_SHADOW_SPIKE_SMALL_BOTTOM }; |
| |
| using internal::BorderImages; |
| |
| // Returns the cached BorderImages for the given |shadow| type. |
| BorderImages* GetBorderImages(BubbleBorder::Shadow shadow) { |
| // Keep a cache of bubble border image-set painters, arrows, and metrics. |
| static BorderImages* kBorderImages[BubbleBorder::SHADOW_COUNT] = { NULL }; |
| |
| CHECK_LT(shadow, BubbleBorder::SHADOW_COUNT); |
| struct BorderImages*& set = kBorderImages[shadow]; |
| if (set) |
| return set; |
| |
| switch (shadow) { |
| case BubbleBorder::NO_SHADOW: |
| case BubbleBorder::NO_SHADOW_OPAQUE_BORDER: |
| set = new BorderImages(kNoShadowImages, kNoShadowArrows, 6, 7, 4); |
| break; |
| case BubbleBorder::BIG_SHADOW: |
| set = new BorderImages(kBigShadowImages, kBigShadowArrows, 23, 9, 2); |
| break; |
| case BubbleBorder::SMALL_SHADOW: |
| set = new BorderImages(kSmallShadowImages, kSmallShadowArrows, 5, 6, 2); |
| break; |
| case BubbleBorder::SHADOW_COUNT: |
| NOTREACHED(); |
| break; |
| } |
| |
| return set; |
| } |
| |
| } // namespace |
| |
| BubbleBorder::BubbleBorder(Arrow arrow, Shadow shadow, SkColor color) |
| : arrow_(arrow), |
| arrow_offset_(0), |
| arrow_paint_type_(PAINT_NORMAL), |
| alignment_(ALIGN_ARROW_TO_MID_ANCHOR), |
| shadow_(shadow), |
| background_color_(color), |
| use_theme_background_color_(false) { |
| DCHECK(shadow < SHADOW_COUNT); |
| images_ = GetBorderImages(shadow); |
| } |
| |
| BubbleBorder::~BubbleBorder() {} |
| |
| gfx::Rect BubbleBorder::GetBounds(const gfx::Rect& anchor_rect, |
| const gfx::Size& contents_size) const { |
| int x = anchor_rect.x(); |
| int y = anchor_rect.y(); |
| int w = anchor_rect.width(); |
| int h = anchor_rect.height(); |
| const gfx::Size size(GetSizeForContentsSize(contents_size)); |
| const int arrow_offset = GetArrowOffset(size); |
| const int arrow_size = |
| images_->arrow_interior_thickness + kStroke - images_->arrow_thickness; |
| const bool mid_anchor = alignment_ == ALIGN_ARROW_TO_MID_ANCHOR; |
| |
| // Calculate the bubble coordinates based on the border and arrow settings. |
| if (is_arrow_on_horizontal(arrow_)) { |
| if (is_arrow_on_left(arrow_)) { |
| x += mid_anchor ? w / 2 - arrow_offset : kStroke - GetBorderThickness(); |
| } else if (is_arrow_at_center(arrow_)) { |
| x += w / 2 - arrow_offset; |
| } else { |
| x += mid_anchor ? w / 2 + arrow_offset - size.width() : |
| w - size.width() + GetBorderThickness() - kStroke; |
| } |
| y += is_arrow_on_top(arrow_) ? h + arrow_size : -arrow_size - size.height(); |
| } else if (has_arrow(arrow_)) { |
| x += is_arrow_on_left(arrow_) ? w + arrow_size : -arrow_size - size.width(); |
| if (is_arrow_on_top(arrow_)) { |
| y += mid_anchor ? h / 2 - arrow_offset : kStroke - GetBorderThickness(); |
| } else if (is_arrow_at_center(arrow_)) { |
| y += h / 2 - arrow_offset; |
| } else { |
| y += mid_anchor ? h / 2 + arrow_offset - size.height() : |
| h - size.height() + GetBorderThickness() - kStroke; |
| } |
| } else { |
| x += (w - size.width()) / 2; |
| y += (arrow_ == NONE) ? h : (h - size.height()) / 2; |
| } |
| |
| return gfx::Rect(x, y, size.width(), size.height()); |
| } |
| |
| int BubbleBorder::GetBorderThickness() const { |
| return images_->border_thickness - images_->border_interior_thickness; |
| } |
| |
| int BubbleBorder::GetBorderCornerRadius() const { |
| return images_->corner_radius; |
| } |
| |
| int BubbleBorder::GetArrowOffset(const gfx::Size& border_size) const { |
| const int edge_length = is_arrow_on_horizontal(arrow_) ? |
| border_size.width() : border_size.height(); |
| if (is_arrow_at_center(arrow_) && arrow_offset_ == 0) |
| return edge_length / 2; |
| |
| // Calculate the minimum offset to not overlap arrow and corner images. |
| const int min = images_->border_thickness + (images_->top_arrow.width() / 2); |
| // Ensure the returned value will not cause image overlap, if possible. |
| return std::max(min, std::min(arrow_offset_, edge_length - min)); |
| } |
| |
| void BubbleBorder::Paint(const views::View& view, gfx::Canvas* canvas) { |
| gfx::Rect bounds(view.GetContentsBounds()); |
| bounds.Inset(-GetBorderThickness(), -GetBorderThickness()); |
| const gfx::Rect arrow_bounds = GetArrowRect(view.GetLocalBounds()); |
| if (arrow_bounds.IsEmpty()) { |
| Painter::PaintPainterAt(canvas, images_->border_painter.get(), bounds); |
| return; |
| } |
| |
| // Clip the arrow bounds out to avoid painting the overlapping edge area. |
| canvas->Save(); |
| SkRect arrow_rect(gfx::RectToSkRect(arrow_bounds)); |
| canvas->sk_canvas()->clipRect(arrow_rect, SkRegion::kDifference_Op); |
| Painter::PaintPainterAt(canvas, images_->border_painter.get(), bounds); |
| canvas->Restore(); |
| |
| DrawArrow(canvas, arrow_bounds); |
| } |
| |
| gfx::Insets BubbleBorder::GetInsets() const { |
| // The insets contain the stroke and shadow pixels outside the bubble fill. |
| const int inset = GetBorderThickness(); |
| if ((arrow_paint_type_ == PAINT_NONE) || !has_arrow(arrow_)) |
| return gfx::Insets(inset, inset, inset, inset); |
| |
| int first_inset = inset; |
| int second_inset = std::max(inset, images_->arrow_thickness); |
| if (is_arrow_on_horizontal(arrow_) ? |
| is_arrow_on_top(arrow_) : is_arrow_on_left(arrow_)) |
| std::swap(first_inset, second_inset); |
| return is_arrow_on_horizontal(arrow_) ? |
| gfx::Insets(first_inset, inset, second_inset, inset) : |
| gfx::Insets(inset, first_inset, inset, second_inset); |
| } |
| |
| gfx::Size BubbleBorder::GetMinimumSize() const { |
| return GetSizeForContentsSize(gfx::Size()); |
| } |
| |
| gfx::Size BubbleBorder::GetSizeForContentsSize( |
| const gfx::Size& contents_size) const { |
| // Enlarge the contents size by the thickness of the border images. |
| gfx::Size size(contents_size); |
| const gfx::Insets insets = GetInsets(); |
| size.Enlarge(insets.width(), insets.height()); |
| |
| // Ensure the bubble is large enough to not overlap border and arrow images. |
| const int min = 2 * images_->border_thickness; |
| const int min_with_arrow_width = min + images_->top_arrow.width(); |
| const int min_with_arrow_thickness = images_->border_thickness + |
| std::max(images_->arrow_thickness + images_->border_interior_thickness, |
| images_->border_thickness); |
| // Only take arrow image sizes into account when the bubble tip is shown. |
| if (arrow_paint_type_ == PAINT_TRANSPARENT || !has_arrow(arrow_)) |
| size.SetToMax(gfx::Size(min, min)); |
| else if (is_arrow_on_horizontal(arrow_)) |
| size.SetToMax(gfx::Size(min_with_arrow_width, min_with_arrow_thickness)); |
| else |
| size.SetToMax(gfx::Size(min_with_arrow_thickness, min_with_arrow_width)); |
| return size; |
| } |
| |
| gfx::ImageSkia* BubbleBorder::GetArrowImage() const { |
| if (!has_arrow(arrow_)) |
| return NULL; |
| if (is_arrow_on_horizontal(arrow_)) { |
| return is_arrow_on_top(arrow_) ? |
| &images_->top_arrow : &images_->bottom_arrow; |
| } |
| return is_arrow_on_left(arrow_) ? |
| &images_->left_arrow : &images_->right_arrow; |
| } |
| |
| gfx::Rect BubbleBorder::GetArrowRect(const gfx::Rect& bounds) const { |
| if (!has_arrow(arrow_) || arrow_paint_type_ != PAINT_NORMAL) |
| return gfx::Rect(); |
| |
| gfx::Point origin; |
| int offset = GetArrowOffset(bounds.size()); |
| const int half_length = images_->top_arrow.width() / 2; |
| const gfx::Insets insets = GetInsets(); |
| |
| if (is_arrow_on_horizontal(arrow_)) { |
| origin.set_x(is_arrow_on_left(arrow_) || is_arrow_at_center(arrow_) ? |
| offset : bounds.width() - offset); |
| origin.Offset(-half_length, 0); |
| if (is_arrow_on_top(arrow_)) |
| origin.set_y(insets.top() - images_->arrow_thickness); |
| else |
| origin.set_y(bounds.height() - insets.bottom()); |
| } else { |
| origin.set_y(is_arrow_on_top(arrow_) || is_arrow_at_center(arrow_) ? |
| offset : bounds.height() - offset); |
| origin.Offset(0, -half_length); |
| if (is_arrow_on_left(arrow_)) |
| origin.set_x(insets.left() - images_->arrow_thickness); |
| else |
| origin.set_x(bounds.width() - insets.right()); |
| } |
| return gfx::Rect(origin, GetArrowImage()->size()); |
| } |
| |
| void BubbleBorder::DrawArrow(gfx::Canvas* canvas, |
| const gfx::Rect& arrow_bounds) const { |
| canvas->DrawImageInt(*GetArrowImage(), arrow_bounds.x(), arrow_bounds.y()); |
| const bool horizontal = is_arrow_on_horizontal(arrow_); |
| const int thickness = images_->arrow_interior_thickness; |
| float tip_x = horizontal ? arrow_bounds.CenterPoint().x() : |
| is_arrow_on_left(arrow_) ? arrow_bounds.right() - thickness : |
| arrow_bounds.x() + thickness; |
| float tip_y = !horizontal ? arrow_bounds.CenterPoint().y() + 0.5f : |
| is_arrow_on_top(arrow_) ? arrow_bounds.bottom() - thickness : |
| arrow_bounds.y() + thickness; |
| const bool positive_offset = horizontal ? |
| is_arrow_on_top(arrow_) : is_arrow_on_left(arrow_); |
| const int offset_to_next_vertex = positive_offset ? |
| images_->arrow_interior_thickness : -images_->arrow_interior_thickness; |
| |
| SkPath path; |
| path.incReserve(4); |
| path.moveTo(SkDoubleToScalar(tip_x), SkDoubleToScalar(tip_y)); |
| path.lineTo(SkDoubleToScalar(tip_x + offset_to_next_vertex), |
| SkDoubleToScalar(tip_y + offset_to_next_vertex)); |
| const int multiplier = horizontal ? 1 : -1; |
| path.lineTo(SkDoubleToScalar(tip_x - multiplier * offset_to_next_vertex), |
| SkDoubleToScalar(tip_y + multiplier * offset_to_next_vertex)); |
| path.close(); |
| |
| SkPaint paint; |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setColor(background_color_); |
| |
| canvas->DrawPath(path, paint); |
| } |
| |
| void BubbleBackground::Paint(gfx::Canvas* canvas, views::View* view) const { |
| if (border_->shadow() == BubbleBorder::NO_SHADOW_OPAQUE_BORDER) |
| canvas->DrawColor(border_->background_color()); |
| |
| // Fill the contents with a round-rect region to match the border images. |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setColor(border_->background_color()); |
| SkPath path; |
| gfx::Rect bounds(view->GetLocalBounds()); |
| bounds.Inset(border_->GetInsets()); |
| |
| SkScalar radius = SkIntToScalar(border_->GetBorderCornerRadius()); |
| path.addRoundRect(gfx::RectToSkRect(bounds), radius, radius); |
| canvas->DrawPath(path, paint); |
| } |
| |
| } // namespace views |