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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Simon Hausmann <hausmann@kde.org>
* Copyright (C) 2003, 2006, 2008, 2010 Apple 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/html/html_font_element.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/css/css_property_value_set.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/css_value_pool.h"
#include "third_party/blink/renderer/core/css/parser/css_parser.h"
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
#include "third_party/blink/renderer/core/html_names.h"
#include "third_party/blink/renderer/platform/wtf/text/parsing_utilities.h"
#include "third_party/blink/renderer/platform/wtf/text/string_to_number.h"
namespace blink {
using namespace cssvalue;
using namespace html_names;
inline HTMLFontElement::HTMLFontElement(Document& document)
: HTMLElement(kFontTag, document) {}
DEFINE_NODE_FACTORY(HTMLFontElement)
// http://www.whatwg.org/specs/web-apps/current-work/multipage/rendering.html#fonts-and-colors
template <typename CharacterType>
static bool ParseFontSize(const CharacterType* characters,
unsigned length,
int& size) {
// Step 1
// Step 2
const CharacterType* position = characters;
const CharacterType* end = characters + length;
// Step 3
SkipWhile<CharacterType, IsHTMLSpace<CharacterType>>(position, end);
// Step 4
if (position == end)
return false;
DCHECK_LT(position, end);
// Step 5
enum { kRelativePlus, kRelativeMinus, kAbsolute } mode;
switch (*position) {
case '+':
mode = kRelativePlus;
++position;
break;
case '-':
mode = kRelativeMinus;
++position;
break;
default:
mode = kAbsolute;
break;
}
// Step 6
const CharacterType* digits_start = position;
SkipWhile<CharacterType, IsASCIIDigit>(position, end);
// Step 7
if (digits_start == position)
return false;
// Step 8
int value = CharactersToInt(digits_start, position - digits_start,
WTF::NumberParsingOptions::kNone, nullptr);
// Step 9
if (mode == kRelativePlus)
value += 3;
else if (mode == kRelativeMinus)
value = 3 - value;
// Step 10
if (value > 7)
value = 7;
// Step 11
if (value < 1)
value = 1;
size = value;
return true;
}
static bool ParseFontSize(const String& input, int& size) {
if (input.IsEmpty())
return false;
if (input.Is8Bit())
return ParseFontSize(input.Characters8(), input.length(), size);
return ParseFontSize(input.Characters16(), input.length(), size);
}
static const CSSValueList* CreateFontFaceValueWithPool(
const AtomicString& string,
SecureContextMode secure_context_mode) {
CSSValuePool::FontFaceValueCache::AddResult entry =
CssValuePool().GetFontFaceCacheEntry(string);
if (!entry.stored_value->value) {
const CSSValue* parsed_value = CSSParser::ParseSingleValue(
CSSPropertyFontFamily, string,
StrictCSSParserContext(secure_context_mode));
if (parsed_value && parsed_value->IsValueList())
entry.stored_value->value = ToCSSValueList(parsed_value);
}
return entry.stored_value->value;
}
bool HTMLFontElement::CssValueFromFontSizeNumber(const String& s,
CSSValueID& size) {
int num = 0;
if (!ParseFontSize(s, num))
return false;
switch (num) {
case 1:
// FIXME: The spec says that we're supposed to use CSSValueXxSmall here.
size = CSSValueXSmall;
break;
case 2:
size = CSSValueSmall;
break;
case 3:
size = CSSValueMedium;
break;
case 4:
size = CSSValueLarge;
break;
case 5:
size = CSSValueXLarge;
break;
case 6:
size = CSSValueXxLarge;
break;
case 7:
size = CSSValueWebkitXxxLarge;
break;
default:
NOTREACHED();
}
return true;
}
bool HTMLFontElement::IsPresentationAttribute(const QualifiedName& name) const {
if (name == kSizeAttr || name == kColorAttr || name == kFaceAttr)
return true;
return HTMLElement::IsPresentationAttribute(name);
}
void HTMLFontElement::CollectStyleForPresentationAttribute(
const QualifiedName& name,
const AtomicString& value,
MutableCSSPropertyValueSet* style) {
if (name == kSizeAttr) {
CSSValueID size = CSSValueInvalid;
if (CssValueFromFontSizeNumber(value, size))
AddPropertyToPresentationAttributeStyle(style, CSSPropertyFontSize, size);
} else if (name == kColorAttr) {
AddHTMLColorToStyle(style, CSSPropertyColor, value);
} else if (name == kFaceAttr && !value.IsEmpty()) {
if (const CSSValueList* font_face_value = CreateFontFaceValueWithPool(
value, GetDocument().GetSecureContextMode())) {
style->SetProperty(
CSSPropertyValue(GetCSSPropertyFontFamily(), *font_face_value));
}
} else {
HTMLElement::CollectStyleForPresentationAttribute(name, value, style);
}
}
} // namespace blink
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