third_party/WebKit/Source/core/svg/SVGTextContentElement.h

   1 /*
   2  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@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 #ifndef SVGTextContentElement_h
  22 #define SVGTextContentElement_h
  23
  24 #include "core/svg/SVGAnimatedBoolean.h"
  25 #include "core/svg/SVGAnimatedEnumeration.h"
  26 #include "core/svg/SVGAnimatedLength.h"
  27 #include "core/svg/SVGGraphicsElement.h"
  28 #include "core/svg/SVGPointTearOff.h"
  29 #include "platform/heap/Handle.h"
  30
  31 namespace blink {
  32
  33 class ExceptionState;
  34
  35 enum SVGLengthAdjustType {
  36     SVGLengthAdjustUnknown,
  37     SVGLengthAdjustSpacing,
  38     SVGLengthAdjustSpacingAndGlyphs
  39 };
  40 template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGLengthAdjustType>();
  41
  42 class SVGTextContentElement : public SVGGraphicsElement {
  43     DEFINE_WRAPPERTYPEINFO();
  44 public:
  45     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
  46     enum {
  47         LENGTHADJUST_UNKNOWN = SVGLengthAdjustUnknown,
  48         LENGTHADJUST_SPACING = SVGLengthAdjustSpacing,
  49         LENGTHADJUST_SPACINGANDGLYPHS = SVGLengthAdjustSpacingAndGlyphs
  50     };
  51
  52     unsigned getNumberOfChars();
  53     float getComputedTextLength();
  54     float getSubStringLength(unsigned charnum, unsigned nchars, ExceptionState&);
  55     PassRefPtrWillBeRawPtr<SVGPointTearOff> getStartPositionOfChar(unsigned charnum, ExceptionState&);
  56     PassRefPtrWillBeRawPtr<SVGPointTearOff> getEndPositionOfChar(unsigned charnum, ExceptionState&);
  57     PassRefPtrWillBeRawPtr<SVGRectTearOff> getExtentOfChar(unsigned charnum, ExceptionState&);
  58     float getRotationOfChar(unsigned charnum, ExceptionState&);
  59     int getCharNumAtPosition(PassRefPtrWillBeRawPtr<SVGPointTearOff>, ExceptionState&);
  60     void selectSubString(unsigned charnum, unsigned nchars, ExceptionState&);
  61
  62     static SVGTextContentElement* elementFromLayoutObject(LayoutObject*);
  63
  64     SVGAnimatedLength* textLength() { return m_textLength.get(); }
  65     bool textLengthIsSpecifiedByUser() { return m_textLengthIsSpecifiedByUser; }
  66     SVGAnimatedEnumeration<SVGLengthAdjustType>* lengthAdjust() { return m_lengthAdjust.get(); }
  67
  68     DECLARE_VIRTUAL_TRACE();
  69
  70 protected:
  71     SVGTextContentElement(const QualifiedName&, Document&);
  72
  73     bool isPresentationAttribute(const QualifiedName&) const final;
  74     void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) final;
  75     void svgAttributeChanged(const QualifiedName&) override;
  76
  77     bool selfHasRelativeLengths() const override;
  78
  79 private:
  80     bool isTextContent() const final { return true; }
  81
  82     RefPtrWillBeMember<SVGAnimatedLength> m_textLength;
  83     bool m_textLengthIsSpecifiedByUser;
  84     RefPtrWillBeMember<SVGAnimatedEnumeration<SVGLengthAdjustType>> m_lengthAdjust;
  85 };
  86
  87 inline bool isSVGTextContentElement(const SVGElement& element)
  88 {
  89     return element.isTextContent();
  90 }
  91
  92 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGTextContentElement);
  93
  94 } // namespace blink
  95
  96 #endif // SVGTextContentElement_h