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// Copyright 2024 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_CAPTURE_MODE_CAPTURE_REGION_OVERLAY_CONTROLLER_H_
#define ASH_CAPTURE_MODE_CAPTURE_REGION_OVERLAY_CONTROLLER_H_
#include <memory>
#include <optional>
#include <string>
#include "ash/ash_export.h"
#include "ash/scanner/scanner_text.h"
#include "ui/gfx/animation/throb_animation.h"
namespace gfx {
class AnimationDelegate;
class Canvas;
class Rect;
class ThrobAnimation;
} // namespace gfx
namespace ui {
class ColorProvider;
} // namespace ui
namespace ash {
// Controls the overlay shown on the capture region to indicate detected text,
// translations, a glow animation while processing, etc.
class ASH_EXPORT CaptureRegionOverlayController {
public:
CaptureRegionOverlayController();
CaptureRegionOverlayController(const CaptureRegionOverlayController&) =
delete;
CaptureRegionOverlayController& operator=(
const CaptureRegionOverlayController&) = delete;
~CaptureRegionOverlayController();
// Notifies the controller of text detected on the capture region. The
// controller will track `detected_text`, e.g. to paint later if needed.
// TODO(b/367548979): This method is currently only used in tests. It should
// be called from backend services once the backend implementation is ready.
void OnTextDetected(std::optional<ScannerText> detected_text);
// Notifies the controller of translated text to show on the overlay. The
// controller will track `translated_text`, e.g. to paint later if needed.
// TODO(b/367549273): This method is currently only used in tests. It should
// be called from backend services once the backend implementation is ready.
void OnTranslatedTextFetched(std::optional<ScannerText> translated_text);
// Paints the capture region overlay onto `canvas`. `region_bounds_in_canvas`
// specifies the coordinates of `canvas` to paint the overlay.
void PaintCaptureRegionOverlay(
gfx::Canvas& canvas,
const gfx::Rect& region_bounds_in_canvas) const;
// Starts a glow animation to be shown around the capture region.
void StartGlowAnimation(gfx::AnimationDelegate* animation_delegate);
// Pauses the glow animation around the capture region at minimum glow, or
// does nothing if there is no current glow animation.
void PauseGlowAnimation();
// Removes the glow animation if it exists.
void RemoveGlowAnimation();
// Returns true if there is currently a glow animation (which may be either
// animated or paused).
bool HasGlowAnimation() const;
// Paints the current glow state onto `canvas`. `region_bounds_in_canvas`
// specifies the coordinates of `canvas` to paint the glow around.
void PaintCurrentGlowState(gfx::Canvas& canvas,
const gfx::Rect& region_bounds_in_canvas,
const ui::ColorProvider* color_provider) const;
const gfx::ThrobAnimation* glow_animation_for_testing() const {
return glow_animation_.get();
}
private:
// Paints detected text regions in the overlay. `region_bounds_in_canvas`
// specifies the coordinates of `canvas` which should contain the overlay.
void PaintDetectedTextRegions(gfx::Canvas& canvas,
const gfx::Rect& region_bounds_in_canvas) const;
// Paints translated text onto the overlay. `region_bounds_in_canvas`
// specifies the coordinates of `canvas` which should contain the overlay.
void PaintTranslatedText(gfx::Canvas& canvas,
const gfx::Rect& region_bounds_in_canvas) const;
std::optional<ScannerText> detected_text_;
std::optional<ScannerText> translated_text_;
// Used to animate a pulsating glow around the capture region.
std::unique_ptr<gfx::ThrobAnimation> glow_animation_;
};
} // namespace ash
#endif // ASH_CAPTURE_MODE_CAPTURE_REGION_OVERLAY_CONTROLLER_H_
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