| /* |
| Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org> |
| 2004, 2005 Rob Buis <buis@kde.org> |
| |
| This file is part of the KDE project |
| |
| 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. |
| */ |
| |
| #include "config.h" |
| #ifdef SVG_SUPPORT |
| #include "IntRect.h" |
| |
| #include <kcanvas/RenderPath.h> |
| #include "KCanvasRenderingStyle.h" |
| |
| #include "ksvg.h" |
| #include "svgpathparser.h" |
| #include "SVGLength.h" |
| #include "SVGElement.h" |
| #include "SVGSVGElement.h" |
| #include "SVGAnimatedRect.h" |
| #include "SVGAnimatedLength.h" |
| |
| #include <math.h> |
| |
| using namespace WebCore; |
| using namespace std; |
| |
| // keep track of textual description of the unit type |
| static const char* UnitText[] = |
| { |
| "", "", |
| "%", "em", |
| "ex", "px", |
| "cm", "mm", |
| "in", "pt", |
| "pc" |
| }; |
| |
| SVGLength::SVGLength(const SVGStyledElement *context, LengthMode mode, const SVGElement *viewport) |
| : Shared<SVGLength>() |
| , m_value(0) |
| , m_valueInSpecifiedUnits(0) |
| , m_mode(mode) |
| , m_bboxRelative(false) |
| , m_unitType(SVG_LENGTHTYPE_UNKNOWN) |
| , m_requiresLayout(false) |
| , m_context(context) |
| , m_viewportElement(viewport) |
| { |
| } |
| |
| SVGLength::~SVGLength() |
| { |
| } |
| |
| unsigned short SVGLength::unitType() const |
| { |
| return m_unitType; |
| } |
| |
| void SVGLength::setValue(float value) |
| { |
| m_value = value; |
| updateValueInSpecifiedUnits(); |
| } |
| |
| float SVGLength::value() const |
| { |
| if (m_requiresLayout) |
| const_cast<SVGLength*>(this)->updateValue(false); |
| |
| if (m_unitType != SVG_LENGTHTYPE_PERCENTAGE) |
| return m_value; |
| |
| float value = m_valueInSpecifiedUnits / 100.0; |
| if (m_bboxRelative) |
| return value; |
| |
| // Use the manual override "m_viewportElement" when there is no context element off of which to establish the viewport. |
| return SVGHelper::PercentageOfViewport(value, m_context ? m_context->viewportElement() : m_viewportElement, static_cast<LengthMode>(m_mode)); |
| } |
| |
| void SVGLength::setValueInSpecifiedUnits(float valueInSpecifiedUnits) |
| { |
| m_valueInSpecifiedUnits = valueInSpecifiedUnits; |
| updateValue(); |
| } |
| |
| float SVGLength::valueInSpecifiedUnits() const |
| { |
| return m_valueInSpecifiedUnits; |
| } |
| |
| void SVGLength::setValueAsString(const String& s) |
| { |
| if(s.isEmpty()) |
| return; |
| |
| DeprecatedString valueAsQString = s.deprecatedString(); |
| |
| double convertedNumber = 0; |
| const char *start = valueAsQString.latin1(); |
| const char *end = parseCoord(start, convertedNumber); |
| m_valueInSpecifiedUnits = convertedNumber; |
| |
| unsigned int diff = end - start; |
| if (diff < valueAsQString.length()) { |
| if (s.endsWith(UnitText[SVG_LENGTHTYPE_PX])) |
| m_unitType = SVG_LENGTHTYPE_PX; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_CM])) |
| m_unitType = SVG_LENGTHTYPE_CM; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_PC])) |
| m_unitType = SVG_LENGTHTYPE_PC; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_MM])) |
| m_unitType = SVG_LENGTHTYPE_MM; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_IN])) |
| m_unitType = SVG_LENGTHTYPE_IN; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_PT])) |
| m_unitType = SVG_LENGTHTYPE_PT; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_PERCENTAGE])) |
| m_unitType = SVG_LENGTHTYPE_PERCENTAGE; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_EMS])) |
| m_unitType = SVG_LENGTHTYPE_EMS; |
| else if (s.endsWith(UnitText[SVG_LENGTHTYPE_EXS])) |
| m_unitType = SVG_LENGTHTYPE_EXS; |
| else if (s.isEmpty()) |
| m_unitType = SVG_LENGTHTYPE_NUMBER; |
| else |
| m_unitType = SVG_LENGTHTYPE_UNKNOWN; |
| } |
| else |
| m_unitType = SVG_LENGTHTYPE_PX; |
| |
| updateValue(); |
| } |
| |
| String SVGLength::valueAsString() const |
| { |
| return String::number(m_valueInSpecifiedUnits) + UnitText[m_unitType]; |
| } |
| |
| void SVGLength::newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits) |
| { |
| m_valueInSpecifiedUnits = valueInSpecifiedUnits; |
| m_unitType = unitType; |
| updateValue(); |
| } |
| |
| void SVGLength::convertToSpecifiedUnits(unsigned short unitType) |
| { |
| m_unitType = unitType; |
| updateValueInSpecifiedUnits(); |
| } |
| |
| double SVGLength::dpi() const |
| { |
| /* FIXME: DPI detection |
| if(context && context->ownerDoc()) |
| { |
| if(mode == LM_WIDTH) |
| return 25.4 * context->ownerDoc()->screenPixelsPerMillimeterX(); |
| else if(mode == LM_HEIGHT) |
| return 25.4 * context->ownerDoc()->screenPixelsPerMillimeterY(); |
| else if(mode == LM_OTHER) |
| return 25.4 * context->ownerDoc()->screenPixelsPerMillimeterX(); |
| } |
| */ |
| |
| return 90.0; |
| } |
| |
| void SVGLength::updateValue(bool notify) |
| { |
| switch(m_unitType) |
| { |
| case SVG_LENGTHTYPE_PX: |
| m_value = m_valueInSpecifiedUnits; |
| break; |
| case SVG_LENGTHTYPE_CM: |
| m_value = (m_valueInSpecifiedUnits / 2.54) * dpi(); |
| break; |
| case SVG_LENGTHTYPE_MM: |
| m_value = (m_valueInSpecifiedUnits / 25.4) * dpi(); |
| break; |
| case SVG_LENGTHTYPE_IN: |
| m_value = m_valueInSpecifiedUnits * dpi(); |
| break; |
| case SVG_LENGTHTYPE_PT: |
| m_value = (m_valueInSpecifiedUnits / 72.0) * dpi(); |
| break; |
| case SVG_LENGTHTYPE_PC: |
| m_value = (m_valueInSpecifiedUnits / 6.0) * dpi(); |
| break; |
| case SVG_LENGTHTYPE_EMS: |
| case SVG_LENGTHTYPE_EXS: |
| if (m_context && m_context->renderer()) { |
| RenderStyle *style = m_context->renderer()->style(); |
| float useSize = style->fontSize(); |
| ASSERT(useSize > 0); |
| if (m_unitType == SVG_LENGTHTYPE_EMS) |
| m_value = m_valueInSpecifiedUnits * useSize; |
| else { |
| float xHeight = style->font().xHeight(); |
| // Use of ceil allows a pixel match to the W3Cs expected output of coords-units-03-b.svg |
| // if this causes problems in real world cases maybe it would be best to remove this |
| m_value = m_valueInSpecifiedUnits * ceil(xHeight); |
| } |
| m_requiresLayout = false; |
| } else { |
| m_requiresLayout = true; |
| } |
| break; |
| } |
| if (notify && m_context) |
| m_context->notifyAttributeChange(); |
| } |
| |
| bool SVGLength::updateValueInSpecifiedUnits(bool notify) |
| { |
| if(m_unitType == SVG_LENGTHTYPE_UNKNOWN) |
| return false; |
| |
| switch(m_unitType) |
| { |
| case SVG_LENGTHTYPE_PERCENTAGE: |
| //kdError() << "updateValueInSpecifiedUnits() SVG_LENGTHTYPE_PERCENTAGE - UNSUPPORTED! Please report!" << endl; |
| return false; |
| case SVG_LENGTHTYPE_EMS: |
| //kdError() << "updateValueInSpecifiedUnits() SVG_LENGTHTYPE_EMS - UNSUPPORTED! Please report!" << endl; |
| return false; |
| case SVG_LENGTHTYPE_EXS: |
| //kdError() << "updateValueInSpecifiedUnits() SVG_LENGTHTYPE_EXS - UNSUPPORTED! Please report!" << endl; |
| return false; |
| case SVG_LENGTHTYPE_PX: |
| m_valueInSpecifiedUnits = m_value; |
| break; |
| case SVG_LENGTHTYPE_CM: |
| m_valueInSpecifiedUnits = m_value / dpi() * 2.54; |
| break; |
| case SVG_LENGTHTYPE_MM: |
| m_valueInSpecifiedUnits = m_value / dpi() * 25.4; |
| break; |
| case SVG_LENGTHTYPE_IN: |
| m_valueInSpecifiedUnits = m_value / dpi(); |
| break; |
| case SVG_LENGTHTYPE_PT: |
| m_valueInSpecifiedUnits = m_value / dpi() * 72.0; |
| break; |
| case SVG_LENGTHTYPE_PC: |
| m_valueInSpecifiedUnits = m_value / dpi() * 6.0; |
| break; |
| }; |
| |
| if (notify && m_context) |
| m_context->notifyAttributeChange(); |
| |
| return true; |
| } |
| |
| bool SVGLength::bboxRelative() const |
| { |
| return m_bboxRelative; |
| } |
| |
| void SVGLength::setBboxRelative(bool relative) |
| { |
| m_bboxRelative = relative; |
| } |
| |
| const SVGStyledElement *SVGLength::context() const |
| { |
| return m_context; |
| } |
| |
| void SVGLength::setContext(const SVGStyledElement *context) |
| { |
| m_context = context; |
| } |
| |
| // vim:ts=4:noet |
| #endif // SVG_SUPPORT |
| |
