| /* |
| * 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 "CSSPropertyNames.h" |
| #include "CSSStyleSheet.h" |
| #include "CSSValueKeywords.h" |
| #include "CSSValueList.h" |
| #include "CSSValuePool.h" |
| #include "HTMLNames.h" |
| #include "HTMLParserIdioms.h" |
| #include "StyleProperties.h" |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/text/StringBuilder.h> |
| #include <wtf/text/StringToIntegerConversion.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLFontElement); |
| |
| using namespace HTMLNames; |
| |
| HTMLFontElement::HTMLFontElement(const QualifiedName& tagName, Document& document) |
| : HTMLElement(tagName, document) |
| { |
| ASSERT(hasTagName(fontTag)); |
| } |
| |
| Ref<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_WITH_SECURITY_IMPLICATION(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 = parseInteger<int>(digits).value_or(0); |
| |
| // 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::hasPresentationalHintsForAttribute(const QualifiedName& name) const |
| { |
| if (name == sizeAttr || name == colorAttr || name == faceAttr) |
| return true; |
| return HTMLElement::hasPresentationalHintsForAttribute(name); |
| } |
| |
| void HTMLFontElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style) |
| { |
| if (name == sizeAttr) { |
| CSSValueID size = CSSValueInvalid; |
| if (cssValueFromFontSizeNumber(value, size)) |
| addPropertyToPresentationalHintStyle(style, CSSPropertyFontSize, size); |
| } else if (name == colorAttr) |
| addHTMLColorToStyle(style, CSSPropertyColor, value); |
| else if (name == faceAttr) { |
| if (auto fontFaceValue = CSSValuePool::singleton().createFontFaceValue(value)) |
| style.setProperty(CSSProperty(CSSPropertyFontFamily, WTFMove(fontFaceValue))); |
| } else |
| HTMLElement::collectPresentationalHintsForAttribute(name, value, style); |
| } |
| |
| } |