third_party/blink/renderer/core/dom/text_link_colors.cc

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
 * rights reserved.
 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
 * (http://www.torchmobile.com/)
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "third_party/blink/renderer/core/dom/text_link_colors.h"

#include "third_party/blink/renderer/core/css/css_color_value.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_light_dark_color_pair.h"
#include "third_party/blink/renderer/core/css/style_color.h"
#include "third_party/blink/renderer/core/layout/layout_theme.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"

namespace blink {

TextLinkColors::TextLinkColors() : text_color_(Color::kBlack) {
  ResetLinkColor();
  ResetVisitedLinkColor();
  ResetActiveLinkColor();
}

void TextLinkColors::ResetLinkColor() {
  link_color_ = Color(0, 0, 238);
}

void TextLinkColors::ResetVisitedLinkColor() {
  visited_link_color_ = Color(85, 26, 139);
}

void TextLinkColors::ResetActiveLinkColor() {
  active_link_color_ = Color(255, 0, 0);
}

Color TextLinkColors::ColorFromCSSValue(const CSSValue& value,
                                        Color current_color,
                                        WebColorScheme color_scheme,
                                        bool for_visited_link) const {
  if (auto* color_value = DynamicTo<cssvalue::CSSColorValue>(value))
    return color_value->Value();

  if (auto* pair = DynamicTo<CSSLightDarkColorPair>(value)) {
    const CSSValue& color_value =
        color_scheme == WebColorScheme::kLight ? pair->First() : pair->Second();
    return ColorFromCSSValue(color_value, current_color, color_scheme,
                             for_visited_link);
  }

  CSSValueID value_id = To<CSSIdentifierValue>(value).GetValueID();
  switch (value_id) {
    case CSSValueID::kInvalid:
      NOTREACHED();
      return Color();
    case CSSValueID::kInternalQuirkInherit:
      return TextColor();
    case CSSValueID::kWebkitLink:
      return for_visited_link ? VisitedLinkColor() : LinkColor();
    case CSSValueID::kWebkitActivelink:
      return ActiveLinkColor();
    case CSSValueID::kWebkitFocusRingColor:
      return LayoutTheme::GetTheme().FocusRingColor();
    case CSSValueID::kCurrentcolor:
      return current_color;
    default:
      return StyleColor::ColorFromKeyword(value_id, color_scheme);
  }
}

}  // namespace blink