blob: 47f4847446e3e2e46e3c0ff32586236c1892c650 [file] [log] [blame]
// Copyright 2016 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 "third_party/blink/renderer/core/css/css_color_value.h"
#include "third_party/blink/renderer/core/css/css_value_pool.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
namespace blink {
namespace cssvalue {
CSSColorValue* CSSColorValue::Create(RGBA32 color) {
// These are the empty and deleted values of the hash table.
if (color == Color::kTransparent)
return CssValuePool().TransparentColor();
if (color == Color::kWhite)
return CssValuePool().WhiteColor();
// Just because it is common.
if (color == Color::kBlack)
return CssValuePool().BlackColor();
CSSValuePool::ColorValueCache::AddResult entry =
CssValuePool().GetColorCacheEntry(color);
if (entry.is_new_entry)
entry.stored_value->value = new CSSColorValue(color);
return entry.stored_value->value;
}
String CSSColorValue::SerializeAsCSSComponentValue(Color color) {
StringBuilder result;
result.ReserveCapacity(32);
bool color_has_alpha = color.HasAlpha();
if (color_has_alpha)
result.Append("rgba(");
else
result.Append("rgb(");
result.AppendNumber(static_cast<unsigned char>(color.Red()));
result.Append(", ");
result.AppendNumber(static_cast<unsigned char>(color.Green()));
result.Append(", ");
result.AppendNumber(static_cast<unsigned char>(color.Blue()));
if (color_has_alpha) {
result.Append(", ");
// See <alphavalue> section in
// https://drafts.csswg.org/cssom/#serializing-css-values
int alphavalue = color.Alpha();
float rounded = round(alphavalue * 100 / 255.0f) / 100;
if (round(rounded * 255) == alphavalue) {
result.AppendNumber(rounded, 2);
} else {
rounded = round(alphavalue * 1000 / 255.0f) / 1000;
result.AppendNumber(rounded, 3);
}
}
result.Append(')');
return result.ToString();
}
} // namespace cssvalue
} // namespace blink