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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/accessibility/ui/accessibility_highlight_layer.h"
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/shell.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkPath.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/paint_recorder.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/wm/core/coordinate_conversion.h"
namespace ash {
namespace {
// Extra margin to add to the layer in DIP.
const int kLayerMargin = 1;
} // namespace
AccessibilityHighlightLayer::AccessibilityHighlightLayer(
AccessibilityLayerDelegate* delegate)
: AccessibilityLayer(delegate) {}
AccessibilityHighlightLayer::~AccessibilityHighlightLayer() = default;
void AccessibilityHighlightLayer::Set(const std::vector<gfx::Rect>& rects,
SkColor color) {
rects_ = rects;
highlight_color_ = color;
// Calculate the bounds of all the rects together, that represents
// the bounds of the full layer.
gfx::Rect bounds = gfx::UnionRects(rects_);
int inset = kLayerMargin;
bounds.Inset(-inset);
display::Display display =
display::Screen::GetScreen()->GetDisplayMatching(bounds);
aura::Window* root_window = Shell::GetRootWindowForDisplayId(display.id());
aura::Window* container = Shell::GetContainer(
root_window, kShellWindowId_AccessibilityPanelContainer);
::wm::ConvertRectFromScreen(container, &bounds);
for (gfx::Rect& rect : rects_)
::wm::ConvertRectFromScreen(container, &rect);
CreateOrUpdateLayer(container, "AccessibilityHighlight", bounds,
/*stack_at_top=*/false);
}
int AccessibilityHighlightLayer::GetInset() const {
return kLayerMargin;
}
void AccessibilityHighlightLayer::OnPaintLayer(
const ui::PaintContext& context) {
ui::PaintRecorder recorder(context, layer_->size());
cc::PaintFlags flags;
flags.setAntiAlias(true);
flags.setStyle(cc::PaintFlags::kFill_Style);
flags.setColor(highlight_color_);
gfx::Rect r = layer_->bounds();
for (gfx::Rect rect : rects_) {
// Offset the rect based on where the layer is on the screen.
rect.Offset(-r.OffsetFromOrigin());
// Add a little bit of margin to the drawn box.
rect.Inset(-kLayerMargin);
recorder.canvas()->DrawRect(rect, flags);
}
}
} // namespace ash
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