svgio/source/svgreader/svgstylenode.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <svgio/svgreader/svgstylenode.hxx>
  21 #include <svgio/svgreader/svgdocument.hxx>
  22
  23 namespace svgio
  24 {
  25     namespace svgreader
  26     {
  27         SvgStyleNode::SvgStyleNode(
  28             SvgDocument& rDocument,
  29             SvgNode* pParent)
  30         :   SvgNode(SVGTokenStyle, rDocument, pParent),
  31             maSvgStyleAttributes(),
  32             mbTextCss(false)
  33         {
  34         }
  35
  36         SvgStyleNode::~SvgStyleNode()
  37         {
  38             while(!maSvgStyleAttributes.empty())
  39             {
  40                 delete *(maSvgStyleAttributes.end() - 1);
  41                 maSvgStyleAttributes.pop_back();
  42             }
  43         }
  44
  45         // #i125258# no parent when we are a CssStyle holder to break potential loops because
  46         // when using CssStyles we jump uncontrolled inside the node tree hierarchy
  47         bool SvgStyleNode::supportsParentStyle() const
  48         {
  49             if(isTextCss())
  50             {
  51                 return false;
  52             }
  53
  54             // call parent
  55             return SvgNode::supportsParentStyle();
  56         }
  57
  58         void SvgStyleNode::parseAttribute(const OUString& rTokenName, SVGToken aSVGToken, const OUString& aContent)
  59         {
  60             // call parent
  61             SvgNode::parseAttribute(rTokenName, aSVGToken, aContent);
  62
  63             // parse own
  64             switch(aSVGToken)
  65             {
  66                 case SVGTokenType:
  67                 {
  68                     if(!aContent.isEmpty())
  69                     {
  70                         if(aContent.startsWith("text/css"))
  71                         {
  72                             setTextCss(true);
  73                         }
  74                     }
  75                     break;
  76                 }
  77                 default:
  78                 {
  79                     break;
  80                 }
  81             }
  82         }
  83
  84         void SvgStyleNode::addCssStyleSheet(const OUString& aSelectors, const SvgStyleAttributes& rNewStyle)
  85         {
  86             // aSelectors: CssStyle selectors, any combination, no comma separations, no spaces at start/end
  87             // rNewStyle: the already preapared style to register on that name
  88             if(!aSelectors.isEmpty())
  89             {
  90                 std::vector< OUString > aSelectorParts;
  91                 const sal_Int32 nLen(aSelectors.getLength());
  92                 sal_Int32 nPos(0);
  93                 OUStringBuffer aToken;
  94
  95                 // split into single tokens (currently only space separator)
  96                 while(nPos < nLen)
  97                 {
  98                     const sal_Int32 nInitPos(nPos);
  99                     copyToLimiter(aSelectors, sal_Unicode(' '), nPos, aToken, nLen);
 100                     skip_char(aSelectors, sal_Unicode(' '), nPos, nLen);
 101                     const OUString aSelectorPart(aToken.makeStringAndClear().trim());
 102
 103                     if(!aSelectorPart.isEmpty())
 104                     {
 105                         aSelectorParts.push_back(aSelectorPart);
 106                     }
 107
 108                     if(nInitPos == nPos)
 109                     {
 110                         OSL_ENSURE(false, "Could not interpret on current position (!)");
 111                         nPos++;
 112                     }
 113                 }
 114
 115                 if(aSelectorParts.size())
 116                 {
 117                     OUString aConcatenatedSelector;
 118
 119                     // re-combine without spaces, create a unique name (for now)
 120                     for(sal_uInt32 a(0); a < aSelectorParts.size(); a++)
 121                     {
 122                         aConcatenatedSelector += aSelectorParts[a];
 123                     }
 124
 125                     // CssStyles in SVG are currently not completely supported; the current idea for
 126                     // supporting the needed minimal set is to register CssStyles associated to a string
 127                     // which is just the space-char cleaned, concatenated Selectors. The part to 'match'
 128                     // these is in fillCssStyleVectorUsingHierarchyAndSelectors. There, the same string is
 129                     // built up using the priorities of local CssStyle, Id, Class and other info combined
 130                     // with the existing hierarchy. This creates a specificity- and priority-sorted local
 131                     // list for each node which is then chained using get/setCssStyleParent.
 132                     // The current solution is capable of solving space-separated selectors which can be
 133                     // mixed between Id, Class and type specifiers.
 134                     // When CssStyles need more specific solving, the start point is here; remember the
 135                     // needed infos not in maIdStyleTokenMapperList at the document, but select evtl.
 136                     // more specific infos there in a class capable of handling more complex matchings.
 137                     // Additionally fillCssStyleVector (or the mechanism above that when a linked list of
 138                     // SvgStyleAttributes will not do it) will have to be adapted to make use of it.
 139
 140                     // register new style at document for (evtl. concatenated) stylename
 141                     const_cast< SvgDocument& >(getDocument()).addSvgStyleAttributesToMapper(aConcatenatedSelector, rNewStyle);
 142                 }
 143             }
 144         }
 145
 146         void SvgStyleNode::addCssStyleSheet(const OUString& aSelectors, const OUString& aContent)
 147         {
 148             // aSelectors: possible comma-separated list of CssStyle definitions, no spaces at start/end
 149             // aContent: the svg style definitions as string
 150             if(!aSelectors.isEmpty() && !aContent.isEmpty())
 151             {
 152                 // create new style and add to local list (for ownership control)
 153                 SvgStyleAttributes* pNewStyle = new SvgStyleAttributes(*this);
 154                 maSvgStyleAttributes.push_back(pNewStyle);
 155
 156                 // fill with content
 157                 pNewStyle->readCssStyle(aContent);
 158
 159                 // comma-separated split (Css abbreviation for same style for multiple selectors)
 160                 const sal_Int32 nLen(aSelectors.getLength());
 161                 sal_Int32 nPos(0);
 162                 OUStringBuffer aToken;
 163
 164                 while(nPos < nLen)
 165                 {
 166                     const sal_Int32 nInitPos(nPos);
 167                     copyToLimiter(aSelectors, sal_Unicode(','), nPos, aToken, nLen);
 168                     skip_char(aSelectors, sal_Unicode(' '), sal_Unicode(','), nPos, nLen);
 169
 170                     const OUString aSingleName(aToken.makeStringAndClear().trim());
 171
 172                     if(aSingleName.getLength())
 173                     {
 174                         addCssStyleSheet(aSingleName, *pNewStyle);
 175                     }
 176
 177                     if(nInitPos == nPos)
 178                     {
 179                         OSL_ENSURE(false, "Could not interpret on current position (!)");
 180                         nPos++;
 181                     }
 182                 }
 183             }
 184         }
 185
 186         void SvgStyleNode::addCssStyleSheet(const OUString& aSelectorsAndContent)
 187         {
 188             const sal_Int32 nLen(aSelectorsAndContent.getLength());
 189
 190             if(nLen)
 191             {
 192                 sal_Int32 nPos(0);
 193                 OUStringBuffer aToken;
 194
 195                 while(nPos < nLen)
 196                 {
 197                     // read the full selectors (may be multiple, comma-separated)
 198                     const sal_Int32 nInitPos(nPos);
 199                     skip_char(aSelectorsAndContent, sal_Unicode(' '), nPos, nLen);
 200                     copyToLimiter(aSelectorsAndContent, sal_Unicode('{'), nPos, aToken, nLen);
 201                     skip_char(aSelectorsAndContent, sal_Unicode(' '), sal_Unicode('{'), nPos, nLen);
 202
 203                     const OUString aSelectors(aToken.makeStringAndClear().trim());
 204                     OUString aContent;
 205
 206                     if(!aSelectors.isEmpty() && nPos < nLen)
 207                     {
 208                         // isolate content as text, embraced by '{' and '}'
 209                         copyToLimiter(aSelectorsAndContent, sal_Unicode('}'), nPos, aToken, nLen);
 210                         skip_char(aSelectorsAndContent, sal_Unicode(' '), sal_Unicode('}'), nPos, nLen);
 211
 212                         aContent = aToken.makeStringAndClear().trim();
 213                     }
 214
 215                     if(!aSelectors.isEmpty() && !aContent.isEmpty())
 216                     {
 217                         addCssStyleSheet(aSelectors, aContent);
 218                     }
 219
 220                     if(nInitPos == nPos)
 221                     {
 222                         OSL_ENSURE(false, "Could not interpret on current position (!)");
 223                         nPos++;
 224                     }
 225                 }
 226             }
 227         }
 228
 229     } // end of namespace svgreader
 230 } // end of namespace svgio
 231
 232 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */