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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* represent a color combines a numeric color and currentcolor */
#ifndef mozilla_StyleComplexColor_h_
#define mozilla_StyleComplexColor_h_
#include "nsColor.h"
namespace mozilla {
/**
* This struct represents a combined color from a numeric color and
* the current foreground color (currentcolor keyword).
* Conceptually, the formula is "color * (1 - p) + currentcolor * p"
* where p is mForegroundRatio. See mozilla::LinearBlendColors for
* the actual algorithm.
*/
struct StyleComplexColor
{
nscolor mColor;
uint8_t mForegroundRatio;
static StyleComplexColor FromColor(nscolor aColor) { return {aColor, 0}; }
static StyleComplexColor CurrentColor() { return {NS_RGBA(0, 0, 0, 0), 255}; }
bool IsNumericColor() const { return mForegroundRatio == 0; }
bool IsCurrentColor() const { return mForegroundRatio == 255; }
bool operator==(const StyleComplexColor& aOther) const {
return mForegroundRatio == aOther.mForegroundRatio &&
(IsCurrentColor() || mColor == aOther.mColor);
}
bool operator!=(const StyleComplexColor& aOther) const {
return !(*this == aOther);
}
};
}
#endif // mozilla_StyleComplexColor_h_
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