diff options
Diffstat (limited to 'xmloff/source/style/TransGradientStyle.cxx')
| -rw-r--r-- | xmloff/source/style/TransGradientStyle.cxx | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/xmloff/source/style/TransGradientStyle.cxx b/xmloff/source/style/TransGradientStyle.cxx new file mode 100644 index 0000000000..74b7670c02 --- /dev/null +++ b/xmloff/source/style/TransGradientStyle.cxx @@ -0,0 +1,285 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <TransGradientStyle.hxx> + +#include <com/sun/star/awt/Gradient2.hpp> + +#include <basegfx/utils/bgradient.hxx> +#include <comphelper/documentconstants.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/ustring.hxx> +#include <sal/log.hxx> +#include <sax/tools/converter.hxx> +#include <tools/color.hxx> +#include <xmloff/namespacemap.hxx> +#include <xmloff/xmlement.hxx> +#include <xmloff/xmlexp.hxx> +#include <xmloff/xmlimp.hxx> +#include <xmloff/xmlnamespace.hxx> +#include <xmloff/xmltkmap.hxx> +#include <xmloff/xmluconv.hxx> +#include <docmodel/uno/UnoGradientTools.hxx> + +using namespace ::com::sun::star; + +using namespace ::xmloff::token; + +SvXMLEnumMapEntry<awt::GradientStyle> const pXML_GradientStyle_Enum[] = +{ + { XML_LINEAR, awt::GradientStyle_LINEAR }, + { XML_GRADIENTSTYLE_AXIAL, awt::GradientStyle_AXIAL }, + { XML_GRADIENTSTYLE_RADIAL, awt::GradientStyle_RADIAL }, + { XML_GRADIENTSTYLE_ELLIPSOID, awt::GradientStyle_ELLIPTICAL }, + { XML_GRADIENTSTYLE_SQUARE, awt::GradientStyle_SQUARE }, + { XML_GRADIENTSTYLE_RECTANGULAR, awt::GradientStyle_RECT }, + { XML_TOKEN_INVALID, awt::GradientStyle(0) } +}; + +// Import + +XMLTransGradientStyleImport::XMLTransGradientStyleImport( SvXMLImport& rImp ) + : rImport(rImp) +{ +} + +void XMLTransGradientStyleImport::importXML( + const uno::Reference< xml::sax::XFastAttributeList >& xAttrList, + uno::Any& rValue, + OUString& rStrName ) +{ + OUString aDisplayName; + + awt::Gradient2 aGradient; + aGradient.XOffset = 0; + aGradient.YOffset = 0; + aGradient.StartIntensity = 100; + aGradient.EndIntensity = 100; + aGradient.Angle = 0; + aGradient.Border = 0; + + for (auto &aIter : sax_fastparser::castToFastAttributeList( xAttrList )) + { + sal_Int32 nTmpValue; + + switch( aIter.getToken() ) + { + case XML_ELEMENT(DRAW, XML_NAME): + { + rStrName = aIter.toString(); + } + break; + case XML_ELEMENT(DRAW, XML_DISPLAY_NAME): + { + aDisplayName = aIter.toString(); + } + break; + case XML_ELEMENT(DRAW, XML_STYLE): + { + SvXMLUnitConverter::convertEnum( aGradient.Style, aIter.toView(), pXML_GradientStyle_Enum ); + } + break; + case XML_ELEMENT(DRAW, XML_CX): + ::sax::Converter::convertPercent( nTmpValue, aIter.toView() ); + aGradient.XOffset = sal::static_int_cast< sal_Int16 >(nTmpValue); + break; + case XML_ELEMENT(DRAW, XML_CY): + ::sax::Converter::convertPercent( nTmpValue, aIter.toView() ); + aGradient.YOffset = sal::static_int_cast< sal_Int16 >(nTmpValue); + break; + case XML_ELEMENT(DRAW, XML_START): + { + sal_Int32 aStartTransparency; + ::sax::Converter::convertPercent( aStartTransparency, aIter.toView() ); + + sal_uInt8 n = sal::static_int_cast< sal_uInt8 >( + ( (100 - aStartTransparency) * 255 ) / 100 ); + + Color aColor( n, n, n ); + aGradient.StartColor = static_cast<sal_Int32>( aColor ); + } + break; + case XML_ELEMENT(DRAW, XML_END): + { + sal_Int32 aEndTransparency; + ::sax::Converter::convertPercent( aEndTransparency, aIter.toView() ); + + sal_uInt8 n = sal::static_int_cast< sal_uInt8 >( + ( (100 - aEndTransparency) * 255 ) / 100 ); + + Color aColor( n, n, n ); + aGradient.EndColor = static_cast<sal_Int32>( aColor ); + } + break; + case XML_ELEMENT(DRAW, XML_GRADIENT_ANGLE): + { + auto const cmp12(rImport.GetODFVersion().compareTo(ODFVER_012_TEXT)); + bool const bSuccess = + ::sax::Converter::convertAngle(aGradient.Angle, aIter.toView(), + // tdf#89475 try to detect borked OOo angles + (cmp12 < 0) || (cmp12 == 0 + && (rImport.isGeneratorVersionOlderThan(SvXMLImport::AOO_4x, SvXMLImport::LO_7x) + // also for AOO 4.x, assume there won't ever be a 4.2 + || rImport.getGeneratorVersion() == SvXMLImport::AOO_4x))); + SAL_INFO_IF(!bSuccess, "xmloff.style", "failed to import draw:angle"); + } + break; + case XML_ELEMENT(DRAW, XML_BORDER): + ::sax::Converter::convertPercent( nTmpValue, aIter.toView() ); + aGradient.Border = sal::static_int_cast< sal_Int16 >(nTmpValue); + break; + + default: + XMLOFF_WARN_UNKNOWN("xmloff.style", aIter); + } + } + + rValue <<= aGradient; + + if( !aDisplayName.isEmpty() ) + { + rImport.AddStyleDisplayName( XmlStyleFamily::SD_GRADIENT_ID, rStrName, + aDisplayName ); + rStrName = aDisplayName; + } +} + +// Export + +XMLTransGradientStyleExport::XMLTransGradientStyleExport( SvXMLExport& rExp ) + : rExport(rExp) +{ +} + +void XMLTransGradientStyleExport::exportXML( + const OUString& rStrName, + const uno::Any& rValue ) +{ + // MCGR: We try to write the gradient so, that applications without multi-color gradient support + // can render it as best as possible. + // This is similar to XMLGradientStyleExport::exportXML(). For details see there. + if( rStrName.isEmpty() ) + return; + if (!rValue.has<css::awt::Gradient2>() && !rValue.has<css::awt::Gradient>()) + return; + + basegfx::BGradient aGradient = model::gradient::getFromAny(rValue); + + aGradient.tryToConvertToAxial(); + + aGradient.tryToRecreateBorder(nullptr); + + OUString aStrValue; + OUStringBuffer aOut; + + // Style + if (!SvXMLUnitConverter::convertEnum(aOut, aGradient.GetGradientStyle(), + pXML_GradientStyle_Enum)) + return; + + // Name + bool bEncoded = false; + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_NAME, + rExport.EncodeStyleName( rStrName, + &bEncoded ) ); + if( bEncoded ) + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_DISPLAY_NAME, + rStrName ); + + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_STYLE, aStrValue ); + + // Center x/y + if (awt::GradientStyle_LINEAR != aGradient.GetGradientStyle() + && awt::GradientStyle_AXIAL != aGradient.GetGradientStyle()) + { + ::sax::Converter::convertPercent(aOut, aGradient.GetXOffset()); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_CX, aStrValue ); + + ::sax::Converter::convertPercent(aOut, aGradient.GetYOffset()); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_CY, aStrValue ); + } + + // LO uses a gray color as transparency. ODF uses opacity in range [0%,100%]. + // Default 100% opacity. + double fOpacityStartPerc = 100.0; + double fOpacityEndPerc = 100.0; + if (!aGradient.GetColorStops().empty()) + { + fOpacityStartPerc + = (1.0 - aGradient.GetColorStops().front().getStopColor().getRed()) * 100.0; + fOpacityEndPerc = (1.0 - aGradient.GetColorStops().back().getStopColor().getRed()) * 100.0; + } + + // Opacity start + ::sax::Converter::convertPercent(aOut, static_cast<sal_Int32>(std::lround(fOpacityStartPerc))); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_START, aStrValue ); + + // Opacity end + ::sax::Converter::convertPercent( aOut, static_cast<sal_Int32>(std::lround(fOpacityEndPerc))); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_END, aStrValue ); + + // Angle + if (awt::GradientStyle_RADIAL != aGradient.GetGradientStyle()) + { + ::sax::Converter::convertAngle(aOut, aGradient.GetAngle().get(), + rExport.getSaneDefaultVersion()); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_GRADIENT_ANGLE, aStrValue ); + } + + // Border + ::sax::Converter::convertPercent(aOut, aGradient.GetBorder()); + aStrValue = aOut.makeStringAndClear(); + rExport.AddAttribute( XML_NAMESPACE_DRAW, XML_BORDER, aStrValue ); + + // ctor writes start tag. End-tag is written by destructor at block end. + SvXMLElementExport rElem(rExport, XML_NAMESPACE_DRAW, XML_OPACITY, true, false); + + // Write child elements <loext:opacity-stop> + // Do not export in standard ODF 1.3 or older. + if ((rExport.getSaneDefaultVersion() & SvtSaveOptions::ODFSVER_EXTENDED) == 0) + return; + if (aGradient.GetColorStops().empty()) + return; + + double fPreviousOffset = 0.0; + for (auto& aCandidate : aGradient.GetColorStops()) + { + // Attribute svg:offset. Make sure offsets are increasing. + double fOffset = std::clamp<double>(aCandidate.getStopOffset(), 0.0, 1.0); + if (fOffset < fPreviousOffset) + fOffset = fPreviousOffset; + rExport.AddAttribute(XML_NAMESPACE_SVG, XML_OFFSET, OUString::number(fOffset)); + fPreviousOffset = fOffset; + + // Attribute svg:stop-opacity, data type zeroToOneDecimal + double fOpacity = std::clamp<double>(1.0 - aCandidate.getStopColor().getRed(), 0.0, 1.0); + rExport.AddAttribute(XML_NAMESPACE_SVG, XML_STOP_OPACITY, OUString::number(fOpacity)); + + // write opacity stop element + SvXMLElementExport aStopElement(rExport, XML_NAMESPACE_LO_EXT, XML_OPACITY_STOP, true, true); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |