From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- layout/style/StyleComplexColor.h | 45 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 layout/style/StyleComplexColor.h (limited to 'layout/style/StyleComplexColor.h') diff --git a/layout/style/StyleComplexColor.h b/layout/style/StyleComplexColor.h new file mode 100644 index 000000000..4acf90a56 --- /dev/null +++ b/layout/style/StyleComplexColor.h @@ -0,0 +1,45 @@ +/* -*- 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_ -- cgit v1.2.3