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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_COLOR_COLOR_PROVIDER_SOURCE_H_
#define UI_COLOR_COLOR_PROVIDER_SOURCE_H_
#include "base/component_export.h"
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "ui/color/color_provider.h"
#include "ui/color/color_provider_key.h"
#include "ui/color/color_provider_utils.h"
namespace ui {
class ColorProviderSourceObserver;
// Encapsulates the theme bits that are used to uniquely identify a
// ColorProvider instance (i.e. the bits that comprise the ColorProviderKey).
// Notifies observers when the ColorProvider instance that maps to these theme
// bits changes. References are managed to avoid dangling pointers in the case
// the source or the observer are deleted.
class COMPONENT_EXPORT(COLOR) ColorProviderSource {
public:
ColorProviderSource();
virtual ~ColorProviderSource();
// Returns the ColorProvider associated with the Key returned by
// GetColorProviderKey().
// TODO(tluk): This shouldn't need to be virtual, most overrides simply pass
// the key to the manager.
virtual const ColorProvider* GetColorProvider() const = 0;
void AddObserver(ColorProviderSourceObserver* observer);
void RemoveObserver(ColorProviderSourceObserver* observer);
// Should be called by the implementation whenever the ColorProvider supplied
// in the method `GetColorProvider()` changes.
void NotifyColorProviderChanged();
// Gets the ColorMode currently associated with this source.
ColorProviderKey::ColorMode GetColorMode() const;
// Gets the ForcedColors state currently associated with this source.
ColorProviderKey::ForcedColors GetForcedColors() const;
// Gets the RendererColorMap corresponding to the ColorProvider for the
// `color_mode` and `forced_colors`.
virtual RendererColorMap GetRendererColorMap(
ColorProviderKey::ColorMode color_mode,
ColorProviderKey::ForcedColors forced_colors) const = 0;
base::ObserverList<ColorProviderSourceObserver>& observers_for_testing() {
return observers_;
}
protected:
// Implementations should return the ColorProviderKey associated with
// this source.
virtual ColorProviderKey GetColorProviderKey() const = 0;
private:
base::ObserverList<ColorProviderSourceObserver> observers_;
};
} // namespace ui
#endif // UI_COLOR_COLOR_PROVIDER_SOURCE_H_
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