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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_ACCESSIBILITY_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_IMPL_H_
#define ASH_ACCESSIBILITY_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_IMPL_H_
#include <map>
#include <memory>
#include <vector>
#include "ash/accessibility/ui/accessibility_animation_one_shot.h"
#include "ash/accessibility/ui/accessibility_focus_ring.h"
#include "ash/accessibility/ui/accessibility_focus_ring_group.h"
#include "ash/accessibility/ui/accessibility_layer.h"
#include "ash/accessibility/ui/layer_animation_info.h"
#include "ash/ash_export.h"
#include "ash/public/cpp/accessibility_focus_ring_controller.h"
#include "base/functional/bind.h"
#include "base/time/time.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/rect.h"
namespace ash {
class AccessibilityCursorRingLayer;
class AccessibilityHighlightLayer;
// AccessibilityFocusRingControllerImpl handles drawing custom rings around the
// focused object, cursor, and/or caret for accessibility.
class ASH_EXPORT AccessibilityFocusRingControllerImpl
: public AccessibilityLayerDelegate,
public AccessibilityFocusRingController {
public:
AccessibilityFocusRingControllerImpl();
AccessibilityFocusRingControllerImpl(
const AccessibilityFocusRingControllerImpl&) = delete;
AccessibilityFocusRingControllerImpl& operator=(
const AccessibilityFocusRingControllerImpl&) = delete;
~AccessibilityFocusRingControllerImpl() override;
// AccessibilityFocusRingController overrides:
void SetFocusRing(
const std::string& focus_ring_id,
std::unique_ptr<AccessibilityFocusRingInfo> focus_ring) override;
void HideFocusRing(const std::string& focus_ring_id) override;
void SetHighlights(const std::vector<gfx::Rect>& rects,
SkColor color) override;
void HideHighlights() override;
void SetFocusRingObserverForTesting(
base::RepeatingCallback<void()> observer) override;
// Draw a ring around the mouse cursor. It fades out automatically.
void SetCursorRing(const gfx::Point& location);
void HideCursorRing();
// Draw a ring around the text caret. It fades out automatically.
void SetCaretRing(const gfx::Point& location);
void HideCaretRing();
// Don't fade in / out, for testing.
void SetNoFadeForTesting();
// Get accessibility layers, for testing.
AccessibilityCursorRingLayer* cursor_layer_for_testing() {
return cursor_layer_.get();
}
AccessibilityCursorRingLayer* caret_layer_for_testing() {
return caret_layer_.get();
}
AccessibilityHighlightLayer* highlight_layer_for_testing() {
return highlight_layer_.get();
}
const AccessibilityFocusRingGroup* GetFocusRingGroupForTesting(
const std::string& focus_ring_id);
// Breaks an SkColor into its opacity and color. If the opacity is not set
// (or is 0xFF), uses the |default_opacity| instead. Visible for testing.
static void GetColorAndOpacityFromColor(SkColor color,
float default_opacity,
SkColor* result_color,
float* result_opacity);
private:
// AccessibilityLayerDelegate overrides.
void OnDeviceScaleFactorChanged() override;
void UpdateHighlightFromHighlightRects();
bool AnimateFocusRings(base::TimeTicks timestamp,
AccessibilityFocusRingGroup* focus_ring);
bool AnimateCursorRing(base::TimeTicks timestamp);
bool AnimateCaretRing(base::TimeTicks timestamp);
void OnLayerChange(LayerAnimationInfo* animation_info);
AccessibilityFocusRingGroup* GetFocusRingGroupForId(
const std::string& focus_ring_id,
bool create);
std::map<std::string, std::unique_ptr<AccessibilityFocusRingGroup>>
focus_ring_groups_;
LayerAnimationInfo cursor_animation_info_;
gfx::Point cursor_location_;
std::unique_ptr<AccessibilityCursorRingLayer> cursor_layer_;
std::unique_ptr<AccessibilityAnimationOneShot> cursor_animation_;
LayerAnimationInfo caret_animation_info_;
gfx::Point caret_location_;
std::unique_ptr<AccessibilityCursorRingLayer> caret_layer_;
std::unique_ptr<AccessibilityAnimationOneShot> caret_animation_;
std::vector<gfx::Rect> highlight_rects_;
std::unique_ptr<AccessibilityHighlightLayer> highlight_layer_;
SkColor highlight_color_ = SK_ColorBLACK;
float highlight_opacity_ = 0.f;
base::RepeatingCallback<void()> focus_ring_observer_for_test_;
bool no_fade_for_testing_ = false;
};
} // namespace ash
#endif // ASH_ACCESSIBILITY_UI_ACCESSIBILITY_FOCUS_RING_CONTROLLER_IMPL_H_
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