blob: 18408b87b4cd86d823b4f2307bc497f748fd0da7 [file] [log] [blame]
// Copyright 2017 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/accessibility/accessibility_highlight_layer.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
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;
for (const gfx::Rect rect : rects_) {
int inset = kLayerMargin;
bounds.Inset(-inset, -inset, -inset, -inset);
display::Display display =
aura::Window* root_window = Shell::GetRootWindowForDisplayId(;
::wm::ConvertRectFromScreen(root_window, &bounds);
CreateOrUpdateLayer(root_window, "AccessibilityHighlight", bounds);
bool AccessibilityHighlightLayer::CanAnimate() const {
return false;
int AccessibilityHighlightLayer::GetInset() const {
return kLayerMargin;
void AccessibilityHighlightLayer::OnPaintLayer(
const ui::PaintContext& context) {
ui::PaintRecorder recorder(context, layer_->size());
cc::PaintFlags flags;
gfx::Rect r = layer_->bounds();
for (gfx::Rect rect : rects_) {
// Offset the rect based on where the layer is on the screen.
// Add a little bit of margin to the drawn box.
rect.Inset(-kLayerMargin, -kLayerMargin, -kLayerMargin, -kLayerMargin);
recorder.canvas()->DrawRect(rect, flags);
} // namespace ash