src/cx/fbn/nevernote/xml/HtmlTagModifier.java

   1 /*\r
   2  * This file is part of NixNote \r
   3  * Copyright 2009 Randy Baumgarte\r
   4  * \r
   5  * This file may be licensed under the terms of of the\r
   6  * GNU General Public License Version 2 (the ``GPL'').\r
   7  *\r
   8  * Software distributed under the License is distributed\r
   9  * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either\r
  10  * express or implied. See the GPL for the specific language\r
  11  * governing rights and limitations.\r
  12  *\r
  13  * You should have received a copy of the GPL along with this\r
  14  * program. If not, go to http://www.gnu.org/licenses/gpl.html\r
  15  * or write to the Free Software Foundation, Inc.,\r
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\r
  17  *\r
  18 */\r
  19 \r
  20 \r
  21 package cx.fbn.nevernote.xml;\r
  22 \r
  23 import com.evernote.edam.type.Resource;\r
  24 \r
  25 import cx.fbn.nevernote.Global;\r
  26 \r
  27 public class HtmlTagModifier {\r
  28         StringBuffer html;\r
  29 \r
  30         public HtmlTagModifier() {\r
  31                 html = null;\r
  32         }\r
  33         \r
  34         public HtmlTagModifier(String data) {\r
  35                 html = new StringBuffer(data);\r
  36         }\r
  37         \r
  38         public void setHtml(String data) {\r
  39                 html = new StringBuffer(data);\r
  40         }\r
  41         \r
  42         public String getHtml() {\r
  43                 return html.toString();\r
  44         }\r
  45         \r
  46         public void modifyLatexTagHash(Resource res) {\r
  47                 \r
  48                 int position = 0;\r
  49                 for (; position<html.length();) {\r
  50                         position = html.indexOf("<img", position);\r
  51                         if (position > 0) {\r
  52                                 if (matchesGuid(position, res.getGuid())) {\r
  53                                         replaceValue(position, "height", new Integer(res.getHeight()).toString());\r
  54                                         replaceValue(position, "width", new Integer(res.getWidth()).toString());\r
  55                                         replaceValue(position, "hash", Global.byteArrayToHexString(res.getData().getBodyHash()));\r
  56                                         return;\r
  57                                 } \r
  58                         }\r
  59                         position = position+1;\r
  60                 }\r
  61                 return;\r
  62         }\r
  63         \r
  64         \r
  65         private boolean matchesGuid(int position, String guid) {\r
  66                 int endPosition = html.indexOf(">", position);\r
  67                 if (endPosition < 0)\r
  68                         return false;\r
  69                 \r
  70                 int guidPos = html.indexOf(guid, position);\r
  71                 if (guidPos > endPosition) \r
  72                         return false;\r
  73                 else\r
  74                         return true;\r
  75         }\r
  76         \r
  77         public void replaceValue(int position, String attribute, String newValue) {\r
  78                 int endPosition = html.indexOf(">", position);\r
  79                 if (endPosition < 0)\r
  80                         return;\r
  81                 \r
  82                 int attributeStart = html.indexOf(attribute, position);\r
  83                 if (attributeStart < 0)\r
  84                         return;\r
  85                 \r
  86                 int attributeEnd = html.indexOf(" ", attributeStart);\r
  87                 if (attributeEnd < 0 || endPosition < attributeEnd) \r
  88                         attributeEnd = endPosition-1;\r
  89                                 \r
  90                 attributeStart = attributeStart+2+attribute.length();\r
  91                 html = html.delete(attributeStart, endPosition-1);\r
  92                 html = html.insert(attributeStart, newValue);\r
  93                 \r
  94         }\r
  95 }\r