| /* |
| * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "core/svg/SVGTextContentElement.h" |
| |
| #include "bindings/core/v8/ExceptionMessages.h" |
| #include "bindings/core/v8/ExceptionState.h" |
| #include "core/CSSPropertyNames.h" |
| #include "core/CSSValueKeywords.h" |
| #include "core/SVGNames.h" |
| #include "core/XMLNames.h" |
| #include "core/editing/FrameSelection.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/frame/UseCounter.h" |
| #include "core/layout/api/LineLayoutItem.h" |
| #include "core/layout/svg/SVGTextQuery.h" |
| #include "core/svg/SVGPointTearOff.h" |
| #include "core/svg/SVGRectTearOff.h" |
| |
| namespace blink { |
| |
| template <> |
| const SVGEnumerationStringEntries& |
| getStaticStringEntries<SVGLengthAdjustType>() { |
| DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ()); |
| if (entries.isEmpty()) { |
| entries.append(std::make_pair(SVGLengthAdjustSpacing, "spacing")); |
| entries.append( |
| std::make_pair(SVGLengthAdjustSpacingAndGlyphs, "spacingAndGlyphs")); |
| } |
| return entries; |
| } |
| |
| // SVGTextContentElement's 'textLength' attribute needs special handling. |
| // It should return getComputedTextLength() when textLength is not specified |
| // manually. |
| class SVGAnimatedTextLength final : public SVGAnimatedLength { |
| public: |
| static SVGAnimatedTextLength* create(SVGTextContentElement* contextElement) { |
| return new SVGAnimatedTextLength(contextElement); |
| } |
| |
| SVGLengthTearOff* baseVal() override { |
| SVGTextContentElement* textContentElement = |
| toSVGTextContentElement(contextElement()); |
| if (!textContentElement->textLengthIsSpecifiedByUser()) |
| baseValue()->newValueSpecifiedUnits( |
| CSSPrimitiveValue::UnitType::Number, |
| textContentElement->getComputedTextLength()); |
| |
| return SVGAnimatedLength::baseVal(); |
| } |
| |
| private: |
| SVGAnimatedTextLength(SVGTextContentElement* contextElement) |
| : SVGAnimatedLength(contextElement, |
| SVGNames::textLengthAttr, |
| SVGLength::create(SVGLengthMode::Width)) {} |
| }; |
| |
| SVGTextContentElement::SVGTextContentElement(const QualifiedName& tagName, |
| Document& document) |
| : SVGGraphicsElement(tagName, document), |
| m_textLength(SVGAnimatedTextLength::create(this)), |
| m_textLengthIsSpecifiedByUser(false), |
| m_lengthAdjust(SVGAnimatedEnumeration<SVGLengthAdjustType>::create( |
| this, |
| SVGNames::lengthAdjustAttr, |
| SVGLengthAdjustSpacing)) { |
| addToPropertyMap(m_textLength); |
| addToPropertyMap(m_lengthAdjust); |
| } |
| |
| DEFINE_TRACE(SVGTextContentElement) { |
| visitor->trace(m_textLength); |
| visitor->trace(m_lengthAdjust); |
| SVGGraphicsElement::trace(visitor); |
| } |
| |
| unsigned SVGTextContentElement::getNumberOfChars() { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| return SVGTextQuery(layoutObject()).numberOfCharacters(); |
| } |
| |
| float SVGTextContentElement::getComputedTextLength() { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| return SVGTextQuery(layoutObject()).textLength(); |
| } |
| |
| float SVGTextContentElement::getSubStringLength( |
| unsigned charnum, |
| unsigned nchars, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| unsigned numberOfChars = getNumberOfChars(); |
| if (charnum >= numberOfChars) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return 0.0f; |
| } |
| |
| if (nchars > numberOfChars - charnum) |
| nchars = numberOfChars - charnum; |
| |
| return SVGTextQuery(layoutObject()).subStringLength(charnum, nchars); |
| } |
| |
| SVGPointTearOff* SVGTextContentElement::getStartPositionOfChar( |
| unsigned charnum, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| if (charnum >= getNumberOfChars()) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatPoint point = |
| SVGTextQuery(layoutObject()).startPositionOfCharacter(charnum); |
| return SVGPointTearOff::create(SVGPoint::create(point), 0, |
| PropertyIsNotAnimVal); |
| } |
| |
| SVGPointTearOff* SVGTextContentElement::getEndPositionOfChar( |
| unsigned charnum, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| if (charnum >= getNumberOfChars()) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatPoint point = |
| SVGTextQuery(layoutObject()).endPositionOfCharacter(charnum); |
| return SVGPointTearOff::create(SVGPoint::create(point), 0, |
| PropertyIsNotAnimVal); |
| } |
| |
| SVGRectTearOff* SVGTextContentElement::getExtentOfChar( |
| unsigned charnum, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| if (charnum >= getNumberOfChars()) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatRect rect = SVGTextQuery(layoutObject()).extentOfCharacter(charnum); |
| return SVGRectTearOff::create(SVGRect::create(rect), 0, PropertyIsNotAnimVal); |
| } |
| |
| float SVGTextContentElement::getRotationOfChar(unsigned charnum, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| if (charnum >= getNumberOfChars()) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return 0.0f; |
| } |
| |
| return SVGTextQuery(layoutObject()).rotationOfCharacter(charnum); |
| } |
| |
| int SVGTextContentElement::getCharNumAtPosition( |
| SVGPointTearOff* point, |
| ExceptionState& exceptionState) { |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| return SVGTextQuery(layoutObject()) |
| .characterNumberAtPosition(point->target()->value()); |
| } |
| |
| void SVGTextContentElement::selectSubString(unsigned charnum, |
| unsigned nchars, |
| ExceptionState& exceptionState) { |
| unsigned numberOfChars = getNumberOfChars(); |
| if (charnum >= numberOfChars) { |
| exceptionState.throwDOMException( |
| IndexSizeError, ExceptionMessages::indexExceedsMaximumBound( |
| "charnum", charnum, getNumberOfChars())); |
| return; |
| } |
| |
| if (nchars > numberOfChars - charnum) |
| nchars = numberOfChars - charnum; |
| |
| ASSERT(document().frame()); |
| |
| // Find selection start |
| VisiblePosition start = VisiblePosition::firstPositionInNode( |
| const_cast<SVGTextContentElement*>(this)); |
| for (unsigned i = 0; i < charnum; ++i) |
| start = nextPositionOf(start); |
| |
| // Find selection end |
| VisiblePosition end(start); |
| for (unsigned i = 0; i < nchars; ++i) |
| end = nextPositionOf(end); |
| |
| // TODO(editing-dev): We assume |start| and |end| are not null and we don't |
| // known when |start| and |end| are null. Once we get a such case, we check |
| // null for |start| and |end|. |
| document().frame()->selection().setSelection( |
| SelectionInDOMTree::Builder() |
| .setBaseAndExtent(start.deepEquivalent(), end.deepEquivalent()) |
| .setAffinity(start.affinity()) |
| .build()); |
| } |
| |
| bool SVGTextContentElement::isPresentationAttribute( |
| const QualifiedName& name) const { |
| if (name.matches(XMLNames::spaceAttr)) |
| return true; |
| return SVGGraphicsElement::isPresentationAttribute(name); |
| } |
| |
| void SVGTextContentElement::collectStyleForPresentationAttribute( |
| const QualifiedName& name, |
| const AtomicString& value, |
| MutableStylePropertySet* style) { |
| if (name.matches(XMLNames::spaceAttr)) { |
| DEFINE_STATIC_LOCAL(const AtomicString, preserveString, ("preserve")); |
| |
| if (value == preserveString) { |
| UseCounter::count(document(), UseCounter::WhiteSpacePreFromXMLSpace); |
| addPropertyToPresentationAttributeStyle(style, CSSPropertyWhiteSpace, |
| CSSValuePre); |
| } else { |
| UseCounter::count(document(), UseCounter::WhiteSpaceNowrapFromXMLSpace); |
| addPropertyToPresentationAttributeStyle(style, CSSPropertyWhiteSpace, |
| CSSValueNowrap); |
| } |
| } else { |
| SVGGraphicsElement::collectStyleForPresentationAttribute(name, value, |
| style); |
| } |
| } |
| |
| void SVGTextContentElement::svgAttributeChanged(const QualifiedName& attrName) { |
| if (attrName == SVGNames::textLengthAttr) |
| m_textLengthIsSpecifiedByUser = true; |
| |
| if (attrName == SVGNames::textLengthAttr || |
| attrName == SVGNames::lengthAdjustAttr || |
| attrName == XMLNames::spaceAttr) { |
| SVGElement::InvalidationGuard invalidationGuard(this); |
| |
| if (LayoutObject* layoutObject = this->layoutObject()) |
| markForLayoutAndParentResourceInvalidation(layoutObject); |
| |
| return; |
| } |
| |
| SVGGraphicsElement::svgAttributeChanged(attrName); |
| } |
| |
| bool SVGTextContentElement::selfHasRelativeLengths() const { |
| // Any element of the <text> subtree is advertized as using relative lengths. |
| // On any window size change, we have to relayout the text subtree, as the |
| // effective 'on-screen' font size may change. |
| return true; |
| } |
| |
| SVGTextContentElement* SVGTextContentElement::elementFromLineLayoutItem( |
| const LineLayoutItem& lineLayoutItem) { |
| if (!lineLayoutItem || |
| (!lineLayoutItem.isSVGText() && !lineLayoutItem.isSVGInline())) |
| return nullptr; |
| |
| SVGElement* element = toSVGElement(lineLayoutItem.node()); |
| ASSERT(element); |
| return isSVGTextContentElement(*element) ? toSVGTextContentElement(element) |
| : 0; |
| } |
| |
| } // namespace blink |
