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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/favicon_base/fallback_icon_style.h"
#include "ui/gfx/color_utils.h"
namespace favicon_base {
namespace {
// Luminance threshold for background color determine whether to use dark or
// light text color.
int kDarkTextLuminanceThreshold = 190;
// Default values for FallbackIconStyle.
SkColor kDefaultBackgroundColor = SkColorSetRGB(0x80, 0x80, 0x80);
SkColor kDefaultTextColorDark = SK_ColorBLACK;
SkColor kDefaultTextColorLight = SK_ColorWHITE;
double kDefaultFontSizeRatio = 0.8;
double kDefaultRoundness = 0.125; // 1 / 8.
} // namespace
FallbackIconStyle::FallbackIconStyle()
: background_color(kDefaultBackgroundColor),
text_color(kDefaultTextColorLight),
font_size_ratio(kDefaultFontSizeRatio),
roundness(kDefaultRoundness) {
}
FallbackIconStyle::~FallbackIconStyle() {
}
void MatchFallbackIconTextColorAgainstBackgroundColor(
FallbackIconStyle* style) {
int luminance = color_utils::GetLuminanceForColor(style->background_color);
style->text_color = (luminance >= kDarkTextLuminanceThreshold ?
kDefaultTextColorDark : kDefaultTextColorLight);
}
bool ValidateFallbackIconStyle(const FallbackIconStyle& style) {
return style.font_size_ratio >= 0.0 && style.font_size_ratio <= 1.0 &&
style.roundness >= 0.0 && style.roundness <= 1.0;
}
} // namespace favicon_base
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