org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/css2/property/FontSizeMeta.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2006 Sybase, Inc. and others.\r
   3  *\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     Sybase, Inc. - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.eclipse.jst.pagedesigner.css2.property;\r
  13 \r
  14 import org.eclipse.jst.pagedesigner.IHTMLConstants;\r
  15 import org.eclipse.jst.pagedesigner.css2.ICSSStyle;\r
  16 import org.eclipse.jst.pagedesigner.css2.font.ICSSFont;\r
  17 import org.eclipse.jst.pagedesigner.css2.value.Length;\r
  18 import org.eclipse.jst.pagedesigner.utils.DOMUtil;\r
  19 import org.w3c.dom.Element;\r
  20 import org.w3c.dom.css.CSSValue;\r
  21 \r
  22 /**\r
  23  * The result value should be Length object only.\r
  24  * \r
  25  * @author mengbo\r
  26  */\r
  27 // XXX: in the future, we may add "unit" into Length, the one unit will be\r
  28 // "MEDIUM"\r
  29 // and specific for font. Means the relative size to MEDIUM. Then it is possible\r
  30 // for\r
  31 // the caller to decide the actual font size based on the style specific MEDIUM\r
  32 // size.\r
  33 public class FontSizeMeta extends LengthMeta {\r
  34         private static final String[] KEYWORDS = { ICSSPropertyID.VAL_XX_SMALL,\r
  35                         ICSSPropertyID.VAL_X_SMALL, ICSSPropertyID.VAL_SMALL,\r
  36                         ICSSPropertyID.VAL_MEDIUM, ICSSPropertyID.VAL_LARGE,\r
  37                         ICSSPropertyID.VAL_X_LARGE, ICSSPropertyID.VAL_XX_LARGE,\r
  38                         ICSSPropertyID.VAL_LARGER, ICSSPropertyID.VAL_SMALLER };\r
  39 \r
  40         /**\r
  41          * font size\r
  42          */\r
  43         public static final double MEDIUM_VAL_INT = 16;\r
  44 \r
  45         private static final double SCALING_FACTOR = 1.2;\r
  46 \r
  47         private static final double FACTORS[] = { 0.6, 0.89, 1, 1.2, 1.5, 2.0, 3.0 };\r
  48 \r
  49         // The scaling factors in IE is different from CSS definition. Here we\r
  50         // follow IE.\r
  51         private static final double CSS_ABSOLUTE_FACTORS[] = { 0.63, 0.82, 1, 1.12,\r
  52                         1.5, 2.0, 3.0 };\r
  53 \r
  54         private static final int MIN_SIZE_FOR_SMALLER = 1;\r
  55 \r
  56         private static final int MIN_SIZE_FOR_LARGER = 9;\r
  57 \r
  58         /**\r
  59          * Default constructor\r
  60          */\r
  61         public FontSizeMeta() {\r
  62                 super(true, new Length((int) MEDIUM_VAL_INT, false));\r
  63         }\r
  64 \r
  65         /*\r
  66          * (non-Javadoc)\r
  67          * \r
  68          * @see org.eclipse.jst.pagedesigner.css2.property.LengthMeta#getBaseFont(org.eclipse.jst.pagedesigner.css2.property.AbstractStyle)\r
  69          */\r
  70         protected ICSSFont getBaseFont(ICSSStyle style) {\r
  71                 return style.getParentStyle().getCSSFont();\r
  72         }\r
  73 \r
  74         /*\r
  75          * (non-Javadoc)\r
  76          * \r
  77          * @see org.eclipse.jst.pagedesigner.css2.property.CSSPropertyMeta#getKeywordValues()\r
  78          */\r
  79         protected String[] getKeywordValues() {\r
  80                 return KEYWORDS;\r
  81         }\r
  82 \r
  83         /*\r
  84          * (non-Javadoc)\r
  85          * \r
  86          * @see org.eclipse.jst.pagedesigner.css2.property.CSSPropertyMeta#getPercentageType()\r
  87          */\r
  88         public int getPercentageType() {\r
  89                 return PERCENTAGE_FONT;\r
  90         }\r
  91 \r
  92         /*\r
  93          * (non-Javadoc)\r
  94          * \r
  95          * @see org.eclipse.jst.pagedesigner.css2.property.LengthMeta#calculateCSSValueResult(org.w3c.dom.css.CSSValue,\r
  96          *      java.lang.String,\r
  97          *      org.eclipse.jst.pagedesigner.css2.style.AbstractStyle)\r
  98          */\r
  99         public Object calculateCSSValueResult(CSSValue value, String propertyName,\r
 100                         ICSSStyle style) {\r
 101                 Object obj = super.calculateCSSValueResult(value, propertyName, style);\r
 102                 if (obj instanceof Length) {\r
 103                         return obj;\r
 104                 }\r
 105                 // otherwise, it is keyword.\r
 106                 return convertKeyword(obj, style);\r
 107         }\r
 108 \r
 109         /**\r
 110          * @param fontsizeobj\r
 111          * @param style\r
 112          * @return the length\r
 113          */\r
 114         protected Length convertKeyword(Object fontsizeobj, ICSSStyle style) {\r
 115                 int fontsize;\r
 116                 int parentfontsize = style.getParentStyle().getCSSFont().getFontSize();\r
 117                 if (fontsizeobj instanceof Length) {\r
 118                         fontsize = ((Length) fontsizeobj).getValue();\r
 119                 } else if (ICSSPropertyID.VAL_XX_SMALL.equals(fontsizeobj)) {\r
 120                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[0]);\r
 121                 } else if (ICSSPropertyID.VAL_X_SMALL.equals(fontsizeobj)) {\r
 122                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[1]);\r
 123                 } else if (ICSSPropertyID.VAL_SMALL.equals(fontsizeobj)) {\r
 124                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[2]);\r
 125                 } else if (ICSSPropertyID.VAL_MEDIUM.equals(fontsizeobj)) {\r
 126                         fontsize = (int) Math.round(MEDIUM_VAL_INT\r
 127                                         * CSS_ABSOLUTE_FACTORS[3]);\r
 128                 } else if (ICSSPropertyID.VAL_LARGE.equals(fontsizeobj)) {\r
 129                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[4]);\r
 130                 } else if (ICSSPropertyID.VAL_X_LARGE.equals(fontsizeobj)) {\r
 131                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[5]);\r
 132                 } else if (ICSSPropertyID.VAL_XX_LARGE.equals(fontsizeobj)) {\r
 133                         fontsize = (int) (MEDIUM_VAL_INT * CSS_ABSOLUTE_FACTORS[6]);\r
 134                 } else if (ICSSPropertyID.VAL_SMALLER.equals(fontsizeobj)) {\r
 135                         fontsize = (int) (parentfontsize / SCALING_FACTOR);\r
 136                         if (fontsize < MIN_SIZE_FOR_SMALLER) {\r
 137                                 fontsize = MIN_SIZE_FOR_SMALLER;\r
 138                         }\r
 139                 } else if (ICSSPropertyID.VAL_LARGER.equals(fontsizeobj)) {\r
 140                         fontsize = (int) (parentfontsize * SCALING_FACTOR);\r
 141                         if (fontsize < MIN_SIZE_FOR_LARGER) {\r
 142                                 fontsize = MIN_SIZE_FOR_LARGER;\r
 143                         }\r
 144                 } else {\r
 145                         fontsize = parentfontsize;\r
 146                 }\r
 147 \r
 148                 return new Length(fontsize, false);\r
 149 \r
 150         }\r
 151 \r
 152         /*\r
 153          * (non-Javadoc)\r
 154          * \r
 155          * @see org.eclipse.jst.pagedesigner.css2.property.CSSPropertyMeta#calculateHTMLAttributeOverride(org.w3c.dom.Element,\r
 156          *      java.lang.String, java.lang.String,\r
 157          *      org.eclipse.jst.pagedesigner.css2.ICSSStyle)\r
 158          */\r
 159         public Object calculateHTMLAttributeOverride(Element element,\r
 160                         String htmltag, String propertyName, ICSSStyle style) {\r
 161                 if (IHTMLConstants.TAG_FONT.equalsIgnoreCase(htmltag)\r
 162                                 || ICSSPropertyID.ATTR_BASEFONT.equalsIgnoreCase(htmltag)) {\r
 163                         String size = DOMUtil.getAttributeIgnoreCase(element,\r
 164                                         ICSSPropertyID.ATTR_SIZE);\r
 165                         if (size != null) {\r
 166                                 size = size.trim();\r
 167                                 try {\r
 168                                         int fontSize = 0;\r
 169                                         if (size.startsWith("+")) //$NON-NLS-1$\r
 170                                         {\r
 171                                                 fontSize = Integer.parseInt(size.substring(1)) + 3;\r
 172                                         } else if (size.startsWith("-")) //$NON-NLS-1$\r
 173                                         {\r
 174                                                 fontSize = 3 - Integer.parseInt(size.substring(1));\r
 175                                         } else {\r
 176                                                 fontSize = Integer.parseInt(size);\r
 177                                         }\r
 178                                         if (fontSize < 1) {\r
 179                                                 fontSize = 1;\r
 180                                         }\r
 181                                         if (fontSize > 7) {\r
 182                                                 fontSize = 7;\r
 183                                         }\r
 184                                         return new Length((int) (Math.round(FACTORS[fontSize - 1]\r
 185                                                         * MEDIUM_VAL_INT)), false);\r
 186                                 } catch (Exception ex) {\r
 187                                         // Error in tag font attr calculating.\r
 188                                         // _log.error("Error.FontSizeMeta.0", ex); //$NON-NLS-1$\r
 189                                         return null;\r
 190                                 }\r
 191                         }\r
 192                 }\r
 193                 return null;\r
 194         }\r
 195 }\r