| /* |
| * Copyright (C) 2007, 2010 Rob Buis <buis@kde.org> |
| * |
| * 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 "core/svg/SVGViewSpec.h" |
| |
| #include "SVGNames.h" |
| #include "core/dom/Document.h" |
| #include "core/svg/SVGAnimatedTransformList.h" |
| #include "core/svg/SVGParserUtilities.h" |
| |
| namespace WebCore { |
| |
| // Define custom non-animated property 'transform'. |
| const SVGPropertyInfo* SVGViewSpec::transformPropertyInfo() |
| { |
| static const SVGPropertyInfo* s_propertyInfo = 0; |
| if (!s_propertyInfo) { |
| s_propertyInfo = new SVGPropertyInfo(AnimatedTransformList, |
| PropertyIsReadOnly, |
| SVGNames::transformAttr, |
| transformIdentifier(), |
| 0, |
| 0); |
| } |
| return s_propertyInfo; |
| } |
| |
| SVGViewSpec::SVGViewSpec(SVGSVGElement* contextElement) |
| // Note: We make |viewBox| and |preserveAspectRatio|'s contextElement the target element of SVGViewSpec. |
| // This contextElement will be only used for keeping this alive from the tearoff. |
| // SVGSVGElement holds a strong-ref to this SVGViewSpec, so this is kept alive as: |
| // AnimatedProperty tearoff -(contextElement)-> SVGSVGElement -(RefPtr)-> SVGViewSpec. |
| : SVGFitToViewBox(contextElement, PropertyMapPolicySkip) // Note: addToPropertyMap is not needed, as SVGViewSpec do not correspond to an element. |
| , m_contextElement(contextElement) |
| { |
| ASSERT(m_contextElement); |
| ScriptWrappable::init(this); |
| |
| viewBox()->setReadOnly(); |
| preserveAspectRatio()->setReadOnly(); |
| } |
| |
| const AtomicString& SVGViewSpec::transformIdentifier() |
| { |
| DEFINE_STATIC_LOCAL(AtomicString, s_identifier, ("SVGViewSpecTransformAttribute", AtomicString::ConstructFromLiteral)); |
| return s_identifier; |
| } |
| |
| String SVGViewSpec::preserveAspectRatioString() const |
| { |
| return preserveAspectRatio()->baseValue()->valueAsString(); |
| } |
| |
| void SVGViewSpec::setTransformString(const String& transform) |
| { |
| if (!m_contextElement) |
| return; |
| |
| SVGTransformList newList; |
| newList.parse(transform); |
| |
| if (SVGAnimatedProperty* wrapper = SVGAnimatedProperty::lookupWrapper<SVGElement, SVGAnimatedTransformList>(m_contextElement, transformPropertyInfo())) |
| static_cast<SVGAnimatedTransformList*>(wrapper)->detachListWrappers(newList.size()); |
| |
| m_transform = newList; |
| } |
| |
| String SVGViewSpec::transformString() const |
| { |
| return SVGPropertyTraits<SVGTransformList>::toString(m_transform); |
| } |
| |
| String SVGViewSpec::viewBoxString() const |
| { |
| return viewBox()->currentValue()->valueAsString(); |
| } |
| |
| SVGElement* SVGViewSpec::viewTarget() const |
| { |
| if (!m_contextElement) |
| return 0; |
| Element* element = m_contextElement->treeScope().getElementById(AtomicString(m_viewTargetString)); |
| if (!element || !element->isSVGElement()) |
| return 0; |
| return toSVGElement(element); |
| } |
| |
| SVGTransformListPropertyTearOff* SVGViewSpec::transform() |
| { |
| if (!m_contextElement) |
| return 0; |
| // Return the animVal here, as its readonly by default - which is exactly what we want here. |
| return static_cast<SVGTransformListPropertyTearOff*>(static_pointer_cast<SVGAnimatedTransformList>(lookupOrCreateTransformWrapper(this))->animVal()); |
| } |
| |
| PassRefPtr<SVGAnimatedProperty> SVGViewSpec::lookupOrCreateTransformWrapper(SVGViewSpec* ownerType) |
| { |
| ASSERT(ownerType); |
| ASSERT(ownerType->contextElement()); |
| return SVGAnimatedProperty::lookupOrCreateWrapper<SVGElement, SVGAnimatedTransformList, SVGTransformList>(ownerType->contextElement(), transformPropertyInfo(), ownerType->m_transform); |
| } |
| |
| void SVGViewSpec::detachContextElement() |
| { |
| clearViewBox(); |
| clearPreserveAspectRatio(); |
| m_contextElement = 0; |
| } |
| |
| void SVGViewSpec::reset() |
| { |
| resetZoomAndPan(); |
| m_transform.clear(); |
| updateViewBox(FloatRect()); |
| ASSERT(preserveAspectRatio()); |
| preserveAspectRatio()->baseValue()->setAlign(SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID); |
| preserveAspectRatio()->baseValue()->setMeetOrSlice(SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET); |
| m_viewTargetString = emptyString(); |
| } |
| |
| static const LChar svgViewSpec[] = {'s', 'v', 'g', 'V', 'i', 'e', 'w'}; |
| static const LChar viewBoxSpec[] = {'v', 'i', 'e', 'w', 'B', 'o', 'x'}; |
| static const LChar preserveAspectRatioSpec[] = {'p', 'r', 'e', 's', 'e', 'r', 'v', 'e', 'A', 's', 'p', 'e', 'c', 't', 'R', 'a', 't', 'i', 'o'}; |
| static const LChar transformSpec[] = {'t', 'r', 'a', 'n', 's', 'f', 'o', 'r', 'm'}; |
| static const LChar zoomAndPanSpec[] = {'z', 'o', 'o', 'm', 'A', 'n', 'd', 'P', 'a', 'n'}; |
| static const LChar viewTargetSpec[] = {'v', 'i', 'e', 'w', 'T', 'a', 'r', 'g', 'e', 't'}; |
| |
| template<typename CharType> |
| bool SVGViewSpec::parseViewSpecInternal(const CharType* ptr, const CharType* end) |
| { |
| if (!skipString(ptr, end, svgViewSpec, WTF_ARRAY_LENGTH(svgViewSpec))) |
| return false; |
| |
| if (ptr >= end || *ptr != '(') |
| return false; |
| ptr++; |
| |
| while (ptr < end && *ptr != ')') { |
| if (*ptr == 'v') { |
| if (skipString(ptr, end, viewBoxSpec, WTF_ARRAY_LENGTH(viewBoxSpec))) { |
| if (ptr >= end || *ptr != '(') |
| return false; |
| ptr++; |
| float x = 0.0f; |
| float y = 0.0f; |
| float width = 0.0f; |
| float height = 0.0f; |
| if (!(parseNumber(ptr, end, x) && parseNumber(ptr, end, y) && parseNumber(ptr, end, width) && parseNumber(ptr, end, height, false))) |
| return false; |
| updateViewBox(FloatRect(x, y, width, height)); |
| if (ptr >= end || *ptr != ')') |
| return false; |
| ptr++; |
| } else if (skipString(ptr, end, viewTargetSpec, WTF_ARRAY_LENGTH(viewTargetSpec))) { |
| if (ptr >= end || *ptr != '(') |
| return false; |
| const CharType* viewTargetStart = ++ptr; |
| while (ptr < end && *ptr != ')') |
| ptr++; |
| if (ptr >= end) |
| return false; |
| setViewTargetString(String(viewTargetStart, ptr - viewTargetStart)); |
| ptr++; |
| } else |
| return false; |
| } else if (*ptr == 'z') { |
| if (!skipString(ptr, end, zoomAndPanSpec, WTF_ARRAY_LENGTH(zoomAndPanSpec))) |
| return false; |
| if (ptr >= end || *ptr != '(') |
| return false; |
| ptr++; |
| if (!parseZoomAndPan(ptr, end)) |
| return false; |
| if (ptr >= end || *ptr != ')') |
| return false; |
| ptr++; |
| } else if (*ptr == 'p') { |
| if (!skipString(ptr, end, preserveAspectRatioSpec, WTF_ARRAY_LENGTH(preserveAspectRatioSpec))) |
| return false; |
| if (ptr >= end || *ptr != '(') |
| return false; |
| ptr++; |
| if (!preserveAspectRatio()->baseValue()->parse(ptr, end, false)) |
| return false; |
| if (ptr >= end || *ptr != ')') |
| return false; |
| ptr++; |
| } else if (*ptr == 't') { |
| if (!skipString(ptr, end, transformSpec, WTF_ARRAY_LENGTH(transformSpec))) |
| return false; |
| if (ptr >= end || *ptr != '(') |
| return false; |
| ptr++; |
| parseTransformAttribute(m_transform, ptr, end, DoNotClearList); |
| if (ptr >= end || *ptr != ')') |
| return false; |
| ptr++; |
| } else |
| return false; |
| |
| if (ptr < end && *ptr == ';') |
| ptr++; |
| } |
| |
| if (ptr >= end || *ptr != ')') |
| return false; |
| |
| return true; |
| } |
| |
| bool SVGViewSpec::parseViewSpec(const String& spec) |
| { |
| if (spec.isEmpty() || !m_contextElement) |
| return false; |
| if (spec.is8Bit()) { |
| const LChar* ptr = spec.characters8(); |
| const LChar* end = ptr + spec.length(); |
| return parseViewSpecInternal(ptr, end); |
| } |
| const UChar* ptr = spec.characters16(); |
| const UChar* end = ptr + spec.length(); |
| return parseViewSpecInternal(ptr, end); |
| } |
| |
| } |