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chromium / chromium / src / refs/tags/123.0.6312.41 / . / ash / accessibility / ui / focus_ring_layer.cc
blob: 6c97a9b41718bef0b13250601c2bbe461e1f3cb8 [file] [log] [blame]
Avi Drissman3a215d1e2022-09-07 19:43:09[diff] [blame]1// Copyright 2013 The Chromium Authors
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
David Tsengb774097e2021-03-24 17:31:10[diff] [blame]5#include "ash/accessibility/ui/focus_ring_layer.h"
6#include "ash/accessibility/ui/accessibility_layer.h"
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]7
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]8#include "ui/aura/window.h"
dmazzoni82a45a82016-06-03 22:33:47[diff] [blame]9#include "ui/compositor/compositor_animation_observer.h"
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]10#include "ui/compositor/layer.h"
danakja91b1082015-04-07 20:59:09[diff] [blame]11#include "ui/compositor/paint_recorder.h"
dmazzoni82a45a82016-06-03 22:33:47[diff] [blame]12#include "ui/display/display.h"
13#include "ui/display/screen.h"
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]14#include "ui/gfx/canvas.h"
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]15
dmazzoni82a45a82016-06-03 22:33:47[diff] [blame]16namespace ui {
17class Compositor;
18}
19
James Cook108e6122017-09-20 19:04:29[diff] [blame]20namespace ash {
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]21
22namespace {
23
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]24const int kShadowRadius = 10;
Scott Little40b0037c2022-07-08 22:23:56[diff] [blame]25const int kShadowAlpha = 90;
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]26const SkColor kShadowColor = SkColorSetRGB(77, 144, 254);
27
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]28} // namespace
29
Katie Dektarc0ad2ff2017-11-08 04:42:08[diff] [blame]30FocusRingLayer::FocusRingLayer(AccessibilityLayerDelegate* delegate)
31 : AccessibilityLayer(delegate) {}
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]32
David Tseng63e73872021-06-29 20:24:51[diff] [blame]33FocusRingLayer::~FocusRingLayer() = default;
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]34
dmazzoni0672582d2017-04-03 19:22:40[diff] [blame]35void FocusRingLayer::SetColor(SkColor color) {
36 custom_color_ = color;
37}
38
39void FocusRingLayer::ResetColor() {
40 custom_color_.reset();
41}
42
Katie Dektar9fa180d2017-11-14 23:45:35[diff] [blame]43int FocusRingLayer::GetInset() const {
Katie Dektarc0ad2ff2017-11-08 04:42:08[diff] [blame]44 return kShadowRadius + 2;
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]45}
46
danakj85d970e2015-04-04 00:15:24[diff] [blame]47void FocusRingLayer::OnPaintLayer(const ui::PaintContext& context) {
Katie Dektarc0ad2ff2017-11-08 04:42:08[diff] [blame]48 if (!root_window_ || layer_rect_.IsEmpty())
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]49 return;
50
weiliangca032f93b2015-07-13 22:39:47[diff] [blame]51 ui::PaintRecorder recorder(context, layer_->size());
danakja91b1082015-04-07 20:59:09[diff] [blame]52
enne11266b82017-03-02 01:43:47[diff] [blame]53 cc::PaintFlags flags;
54 flags.setAntiAlias(true);
dmazzoni0672582d2017-04-03 19:22:40[diff] [blame]55 flags.setColor(custom_color_ ? *custom_color_ : kShadowColor);
enne11266b82017-03-02 01:43:47[diff] [blame]56 flags.setStyle(cc::PaintFlags::kStroke_Style);
57 flags.setStrokeWidth(2);
danakja91b1082015-04-07 20:59:09[diff] [blame]58
Katie Dektarc0ad2ff2017-11-08 04:42:08[diff] [blame]59 gfx::Rect bounds = layer_rect_ - layer_->bounds().OffsetFromOrigin();
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]60 int r = kShadowRadius;
61 for (int i = 0; i < r; i++) {
62 // Fade out alpha quadratically.
Juanmi Huertas48873b52023-01-17 23:03:43[diff] [blame]63 flags.setAlphaf((kShadowAlpha * (r - i) * (r - i)) / (r * r) / 255.0f);
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]64 gfx::Rect outsetRect = bounds;
Xianzhu Wang549ddc42022-04-04 17:05:55[diff] [blame]65 outsetRect.Inset(-i);
enne11266b82017-03-02 01:43:47[diff] [blame]66 recorder.canvas()->DrawRect(outsetRect, flags);
dmazzoni@chromium.org34c526a2013-11-08 08:49:43[diff] [blame]67 }
xiyuan@chromium.orgefbcfdf2013-06-05 00:04:50[diff] [blame]68}
69
James Cook108e6122017-09-20 19:04:29[diff] [blame]70} // namespace ash