1 /* 2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis (at) kde.org> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #include "config.h" 22 #include "core/svg/SVGLengthList.h" 23 24 #include "bindings/v8/ExceptionStatePlaceholder.h" 25 #include "core/svg/SVGAnimationElement.h" 26 #include "core/svg/SVGParserUtilities.h" 27 #include "wtf/text/StringBuilder.h" 28 29 namespace WebCore { 30 31 inline PassRefPtr<SVGLengthList> toSVGLengthList(PassRefPtr<SVGPropertyBase> passBase) 32 { 33 RefPtr<SVGPropertyBase> base = passBase; 34 ASSERT(base->type() == SVGLengthList::classType()); 35 return static_pointer_cast<SVGLengthList>(base.release()); 36 } 37 38 SVGLengthList::SVGLengthList(SVGLengthMode mode) 39 : m_mode(mode) 40 { 41 } 42 43 SVGLengthList::~SVGLengthList() 44 { 45 } 46 47 PassRefPtr<SVGLengthList> SVGLengthList::clone() 48 { 49 RefPtr<SVGLengthList> ret = SVGLengthList::create(m_mode); 50 ret->deepCopy(this); 51 return ret.release(); 52 } 53 54 PassRefPtr<SVGPropertyBase> SVGLengthList::cloneForAnimation(const String& value) const 55 { 56 RefPtr<SVGLengthList> ret = SVGLengthList::create(m_mode); 57 ret->setValueAsString(value, IGNORE_EXCEPTION); 58 return ret.release(); 59 } 60 61 String SVGLengthList::valueAsString() const 62 { 63 StringBuilder builder; 64 65 ConstIterator it = begin(); 66 ConstIterator itEnd = end(); 67 if (it != itEnd) { 68 builder.append(it->valueAsString()); 69 ++it; 70 71 for (; it != itEnd; ++it) { 72 builder.append(' '); 73 builder.append(it->valueAsString()); 74 } 75 } 76 77 return builder.toString(); 78 } 79 80 template <typename CharType> 81 void SVGLengthList::parseInternal(const CharType*& ptr, const CharType* end, ExceptionState& exceptionState) 82 { 83 clear(); 84 while (ptr < end) { 85 const CharType* start = ptr; 86 while (ptr < end && *ptr != ',' && !isHTMLSpace<CharType>(*ptr)) 87 ptr++; 88 if (ptr == start) 89 break; 90 91 RefPtr<SVGLength> length = SVGLength::create(m_mode); 92 String valueString(start, ptr - start); 93 if (valueString.isEmpty()) 94 return; 95 length->setValueAsString(valueString, exceptionState); 96 if (exceptionState.hadException()) 97 return; 98 append(length); 99 skipOptionalSVGSpacesOrDelimiter(ptr, end); 100 } 101 } 102 103 void SVGLengthList::setValueAsString(const String& value, ExceptionState& exceptionState) 104 { 105 if (value.isEmpty()) { 106 clear(); 107 return; 108 } 109 if (value.is8Bit()) { 110 const LChar* ptr = value.characters8(); 111 const LChar* end = ptr + value.length(); 112 parseInternal(ptr, end, exceptionState); 113 } else { 114 const UChar* ptr = value.characters16(); 115 const UChar* end = ptr + value.length(); 116 parseInternal(ptr, end, exceptionState); 117 } 118 } 119 120 void SVGLengthList::add(PassRefPtrWillBeRawPtr<SVGPropertyBase> other, SVGElement* contextElement) 121 { 122 RefPtr<SVGLengthList> otherList = toSVGLengthList(other); 123 124 if (length() != otherList->length()) 125 return; 126 127 SVGLengthContext lengthContext(contextElement); 128 for (size_t i = 0; i < length(); ++i) 129 at(i)->setValue(at(i)->value(lengthContext) + otherList->at(i)->value(lengthContext), lengthContext, ASSERT_NO_EXCEPTION); 130 } 131 132 bool SVGLengthList::adjustFromToListValues(PassRefPtr<SVGLengthList> passFromList, PassRefPtr<SVGLengthList> passToList, float percentage, bool isToAnimation, bool resizeAnimatedListIfNeeded) 133 { 134 RefPtr<SVGLengthList> fromList = passFromList; 135 RefPtr<SVGLengthList> toList = passToList; 136 137 // If no 'to' value is given, nothing to animate. 138 size_t toListSize = toList->length(); 139 if (!toListSize) 140 return false; 141 142 // If the 'from' value is given and it's length doesn't match the 'to' value list length, fallback to a discrete animation. 143 size_t fromListSize = fromList->length(); 144 if (fromListSize != toListSize && fromListSize) { 145 if (percentage < 0.5) { 146 if (!isToAnimation) 147 deepCopy(fromList); 148 } else { 149 deepCopy(toList); 150 } 151 152 return false; 153 } 154 155 ASSERT(!fromListSize || fromListSize == toListSize); 156 if (resizeAnimatedListIfNeeded && length() < toListSize) { 157 size_t paddingCount = toListSize - length(); 158 for (size_t i = 0; i < paddingCount; ++i) 159 append(SVGLength::create(m_mode)); 160 } 161 162 return true; 163 } 164 165 void SVGLengthList::calculateAnimatedValue(SVGAnimationElement* animationElement, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> fromValue, PassRefPtr<SVGPropertyBase> toValue, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) 166 { 167 RefPtr<SVGLengthList> fromList = toSVGLengthList(fromValue); 168 RefPtr<SVGLengthList> toList = toSVGLengthList(toValue); 169 RefPtr<SVGLengthList> toAtEndOfDurationList = toSVGLengthList(toAtEndOfDurationValue); 170 171 SVGLengthContext lengthContext(contextElement); 172 ASSERT(m_mode == SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName())); 173 174 size_t fromLengthListSize = fromList->length(); 175 size_t toLengthListSize = toList->length(); 176 size_t toAtEndOfDurationListSize = toAtEndOfDurationList->length(); 177 178 if (!adjustFromToListValues(fromList, toList, percentage, animationElement->animationMode() == ToAnimation, true)) 179 return; 180 181 for (size_t i = 0; i < toLengthListSize; ++i) { 182 float animatedNumber = at(i)->value(lengthContext); 183 SVGLengthType unitType = toList->at(i)->unitType(); 184 float effectiveFrom = 0; 185 if (fromLengthListSize) { 186 if (percentage < 0.5) 187 unitType = fromList->at(i)->unitType(); 188 effectiveFrom = fromList->at(i)->value(lengthContext); 189 } 190 float effectiveTo = toList->at(i)->value(lengthContext); 191 float effectiveToAtEnd = i < toAtEndOfDurationListSize ? toAtEndOfDurationList->at(i)->value(lengthContext) : 0; 192 193 animationElement->animateAdditiveNumber(percentage, repeatCount, effectiveFrom, effectiveTo, effectiveToAtEnd, animatedNumber); 194 at(i)->setUnitType(unitType); 195 at(i)->setValue(animatedNumber, lengthContext, ASSERT_NO_EXCEPTION); 196 } 197 } 198 199 float SVGLengthList::calculateDistance(PassRefPtr<SVGPropertyBase> to, SVGElement*) 200 { 201 // FIXME: Distance calculation is not possible for SVGLengthList right now. We need the distance for every single value. 202 return -1; 203 } 204 } 205