| /* |
| * 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 "third_party/blink/renderer/core/svg/svg_text_content_element.h" |
| |
| #include "third_party/blink/renderer/core/css/css_property_names.h" |
| #include "third_party/blink/renderer/core/css_value_keywords.h" |
| #include "third_party/blink/renderer/core/editing/frame_selection.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/use_counter.h" |
| #include "third_party/blink/renderer/core/layout/api/line_layout_item.h" |
| #include "third_party/blink/renderer/core/layout/svg/svg_text_query.h" |
| #include "third_party/blink/renderer/core/svg/svg_enumeration_map.h" |
| #include "third_party/blink/renderer/core/svg/svg_point_tear_off.h" |
| #include "third_party/blink/renderer/core/svg/svg_rect_tear_off.h" |
| #include "third_party/blink/renderer/core/svg_names.h" |
| #include "third_party/blink/renderer/core/xml_names.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_messages.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| |
| namespace blink { |
| |
| template <> |
| const SVGEnumerationMap& GetEnumerationMap<SVGLengthAdjustType>() { |
| static const SVGEnumerationMap::Entry enum_items[] = { |
| {kSVGLengthAdjustSpacing, "spacing"}, |
| {kSVGLengthAdjustSpacingAndGlyphs, "spacingAndGlyphs"}, |
| }; |
| static const SVGEnumerationMap entries(enum_items); |
| 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* context_element) { |
| return MakeGarbageCollected<SVGAnimatedTextLength>(context_element); |
| } |
| |
| SVGAnimatedTextLength(SVGTextContentElement* context_element) |
| : SVGAnimatedLength(context_element, |
| svg_names::kTextLengthAttr, |
| SVGLengthMode::kWidth, |
| SVGLength::Initial::kUnitlessZero) {} |
| |
| SVGLengthTearOff* baseVal() override { |
| SVGTextContentElement* text_content_element = |
| ToSVGTextContentElement(ContextElement()); |
| if (!text_content_element->TextLengthIsSpecifiedByUser()) |
| BaseValue()->NewValueSpecifiedUnits( |
| CSSPrimitiveValue::UnitType::kNumber, |
| text_content_element->getComputedTextLength()); |
| |
| return SVGAnimatedLength::baseVal(); |
| } |
| }; |
| |
| SVGTextContentElement::SVGTextContentElement(const QualifiedName& tag_name, |
| Document& document) |
| : SVGGraphicsElement(tag_name, document), |
| text_length_(SVGAnimatedTextLength::Create(this)), |
| text_length_is_specified_by_user_(false), |
| length_adjust_(SVGAnimatedEnumeration<SVGLengthAdjustType>::Create( |
| this, |
| svg_names::kLengthAdjustAttr, |
| kSVGLengthAdjustSpacing)) { |
| AddToPropertyMap(text_length_); |
| AddToPropertyMap(length_adjust_); |
| } |
| |
| void SVGTextContentElement::Trace(blink::Visitor* visitor) { |
| visitor->Trace(text_length_); |
| visitor->Trace(length_adjust_); |
| SVGGraphicsElement::Trace(visitor); |
| } |
| |
| unsigned SVGTextContentElement::getNumberOfChars() { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| return SVGTextQuery(GetLayoutObject()).NumberOfCharacters(); |
| } |
| |
| float SVGTextContentElement::getComputedTextLength() { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| return SVGTextQuery(GetLayoutObject()).TextLength(); |
| } |
| |
| float SVGTextContentElement::getSubStringLength( |
| unsigned charnum, |
| unsigned nchars, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| |
| unsigned number_of_chars = getNumberOfChars(); |
| if (charnum >= number_of_chars) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return 0.0f; |
| } |
| |
| if (nchars > number_of_chars - charnum) |
| nchars = number_of_chars - charnum; |
| |
| return SVGTextQuery(GetLayoutObject()).SubStringLength(charnum, nchars); |
| } |
| |
| SVGPointTearOff* SVGTextContentElement::getStartPositionOfChar( |
| unsigned charnum, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| |
| if (charnum >= getNumberOfChars()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatPoint point = |
| SVGTextQuery(GetLayoutObject()).StartPositionOfCharacter(charnum); |
| return SVGPointTearOff::CreateDetached(point); |
| } |
| |
| SVGPointTearOff* SVGTextContentElement::getEndPositionOfChar( |
| unsigned charnum, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| |
| if (charnum >= getNumberOfChars()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatPoint point = |
| SVGTextQuery(GetLayoutObject()).EndPositionOfCharacter(charnum); |
| return SVGPointTearOff::CreateDetached(point); |
| } |
| |
| SVGRectTearOff* SVGTextContentElement::getExtentOfChar( |
| unsigned charnum, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| |
| if (charnum >= getNumberOfChars()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return nullptr; |
| } |
| |
| FloatRect rect = SVGTextQuery(GetLayoutObject()).ExtentOfCharacter(charnum); |
| return SVGRectTearOff::CreateDetached(rect); |
| } |
| |
| float SVGTextContentElement::getRotationOfChar( |
| unsigned charnum, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| |
| if (charnum >= getNumberOfChars()) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return 0.0f; |
| } |
| |
| return SVGTextQuery(GetLayoutObject()).RotationOfCharacter(charnum); |
| } |
| |
| int SVGTextContentElement::getCharNumAtPosition( |
| SVGPointTearOff* point, |
| ExceptionState& exception_state) { |
| GetDocument().UpdateStyleAndLayoutForNode(this); |
| return SVGTextQuery(GetLayoutObject()) |
| .CharacterNumberAtPosition(point->Target()->Value()); |
| } |
| |
| void SVGTextContentElement::selectSubString(unsigned charnum, |
| unsigned nchars, |
| ExceptionState& exception_state) { |
| unsigned number_of_chars = getNumberOfChars(); |
| if (charnum >= number_of_chars) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("charnum", charnum, |
| getNumberOfChars())); |
| return; |
| } |
| |
| if (nchars > number_of_chars - charnum) |
| nchars = number_of_chars - charnum; |
| |
| DCHECK(GetDocument().GetFrame()); |
| GetDocument().GetFrame()->Selection().SelectSubString(*this, charnum, nchars); |
| } |
| |
| bool SVGTextContentElement::IsPresentationAttribute( |
| const QualifiedName& name) const { |
| if (name.Matches(xml_names::kSpaceAttr)) |
| return true; |
| return SVGGraphicsElement::IsPresentationAttribute(name); |
| } |
| |
| void SVGTextContentElement::CollectStyleForPresentationAttribute( |
| const QualifiedName& name, |
| const AtomicString& value, |
| MutableCSSPropertyValueSet* style) { |
| if (name.Matches(xml_names::kSpaceAttr)) { |
| DEFINE_STATIC_LOCAL(const AtomicString, preserve_string, ("preserve")); |
| |
| if (value == preserve_string) { |
| UseCounter::Count(GetDocument(), WebFeature::kWhiteSpacePreFromXMLSpace); |
| AddPropertyToPresentationAttributeStyle(style, CSSPropertyID::kWhiteSpace, |
| CSSValuePre); |
| } else { |
| UseCounter::Count(GetDocument(), |
| WebFeature::kWhiteSpaceNowrapFromXMLSpace); |
| AddPropertyToPresentationAttributeStyle(style, CSSPropertyID::kWhiteSpace, |
| CSSValueNowrap); |
| } |
| } else { |
| SVGGraphicsElement::CollectStyleForPresentationAttribute(name, value, |
| style); |
| } |
| } |
| |
| void SVGTextContentElement::SvgAttributeChanged( |
| const QualifiedName& attr_name) { |
| if (attr_name == svg_names::kTextLengthAttr) |
| text_length_is_specified_by_user_ = true; |
| |
| if (attr_name == svg_names::kTextLengthAttr || |
| attr_name == svg_names::kLengthAdjustAttr || |
| attr_name == xml_names::kSpaceAttr) { |
| SVGElement::InvalidationGuard invalidation_guard(this); |
| |
| if (LayoutObject* layout_object = GetLayoutObject()) |
| MarkForLayoutAndParentResourceInvalidation(*layout_object); |
| |
| return; |
| } |
| |
| SVGGraphicsElement::SvgAttributeChanged(attr_name); |
| } |
| |
| 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& line_layout_item) { |
| if (!line_layout_item || |
| (!line_layout_item.IsSVGText() && !line_layout_item.IsSVGInline())) |
| return nullptr; |
| |
| SVGElement* element = ToSVGElement(line_layout_item.GetNode()); |
| DCHECK(element); |
| return IsSVGTextContentElement(*element) ? ToSVGTextContentElement(element) |
| : nullptr; |
| } |
| |
| } // namespace blink |
