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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 "config.h"
#include "HTMLFontElement.h"
#include "Attribute.h"
#include "CSSPropertyNames.h"
#include "CSSStyleSheet.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "StylePropertySet.h"
#include <wtf/text/StringBuilder.h>
using namespace WTF;
namespace WebCore {
using namespace HTMLNames;
HTMLFontElement::HTMLFontElement(const QualifiedName& tagName, Document* document)
: HTMLElement(tagName, document)
{
ASSERT(hasTagName(fontTag));
}
PassRefPtr<HTMLFontElement> HTMLFontElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new HTMLFontElement(tagName, document));
}
// 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
while (position < end) {
if (!isHTMLSpace(*position))
break;
++position;
}
// Step 4
if (position == end)
return false;
ASSERT(position < end);
// Step 5
enum {
RelativePlus,
RelativeMinus,
Absolute
} mode;
switch (*position) {
case '+':
mode = RelativePlus;
++position;
break;
case '-':
mode = RelativeMinus;
++position;
break;
default:
mode = Absolute;
break;
}
// Step 6
StringBuilder digits;
digits.reserveCapacity(16);
while (position < end) {
if (!isASCIIDigit(*position))
break;
digits.append(*position++);
}
// Step 7
if (digits.isEmpty())
return false;
// Step 8
int value;
if (digits.is8Bit())
value = charactersToIntStrict(digits.characters8(), digits.length());
else
value = charactersToIntStrict(digits.characters16(), digits.length());
// Step 9
if (mode == RelativePlus)
value += 3;
else if (mode == RelativeMinus)
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);
}
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:
ASSERT_NOT_REACHED();
}
return true;
}
bool HTMLFontElement::isPresentationAttribute(const QualifiedName& name) const
{
if (name == sizeAttr || name == colorAttr || name == faceAttr)
return true;
return HTMLElement::isPresentationAttribute(name);
}
void HTMLFontElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
{
if (name == sizeAttr) {
CSSValueID size = CSSValueInvalid;
if (cssValueFromFontSizeNumber(value, size))
addPropertyToPresentationAttributeStyle(style, CSSPropertyFontSize, size);
} else if (name == colorAttr)
addHTMLColorToStyle(style, CSSPropertyColor, value);
else if (name == faceAttr) {
if (RefPtr<CSSValueList> fontFaceValue = cssValuePool().createFontFaceValue(value))
style->setProperty(CSSProperty(CSSPropertyFontFamily, fontFaceValue.release()));
} else
HTMLElement::collectStyleForPresentationAttribute(name, value, style);
}
}
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