1 | define(["./_base", "dojo/_base/lang","dojo/_base/sniff", "dojo/dom", "dojo/_base/html", "dojo/_base/array", |
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2 | "./utils", "./shape", "./path", "dojox/string/BidiEngine"], |
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3 | function(g, lang, has, dom, html, arr, utils, shapeLib, pathLib, BidiEngine){ |
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4 | lang.getObject("dojox.gfx._gfxBidiSupport", true); |
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5 | |
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6 | /*===== |
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7 | // Prevent changes here from masking the definitions in _base.js from the doc parser |
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8 | var origG = g; |
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9 | g = {}; |
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10 | =====*/ |
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11 | |
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12 | switch (g.renderer){ |
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13 | case 'vml': |
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14 | g.isVml = true; |
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15 | break; |
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16 | case 'svg': |
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17 | g.isSvg = true; |
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18 | if(g.svg.useSvgWeb){ |
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19 | g.isSvgWeb = true; |
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20 | } |
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21 | break; |
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22 | case 'silverlight': |
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23 | g.isSilverlight = true; |
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24 | break; |
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25 | case 'canvas': |
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26 | case 'canvasWithEvents': |
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27 | g.isCanvas = true; |
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28 | break; |
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29 | } |
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30 | |
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31 | var bidi_const = { |
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32 | LRM : '\u200E', |
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33 | LRE : '\u202A', |
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34 | PDF : '\u202C', |
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35 | RLM : '\u200f', |
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36 | RLE : '\u202B' |
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37 | }; |
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38 | |
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39 | /*===== g = origG; =====*/ |
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40 | |
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41 | // the object that performs text transformations. |
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42 | var bidiEngine = new BidiEngine(); |
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43 | |
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44 | lang.extend(g.shape.Surface, { |
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45 | // textDir: String |
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46 | // Will be used as default for Text/TextPath/Group objects that created by this surface |
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47 | // and textDir wasn't directly specified for them, though the bidi support was loaded. |
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48 | // Can be set in two ways: |
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49 | // |
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50 | // 1. When the surface is created and textDir value passed to it as fourth |
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51 | // parameter. |
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52 | // 2. Using the setTextDir(String) function, when this function is used the value |
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53 | // of textDir propagates to all of it's children and the children of children (for Groups) etc. |
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54 | textDir: "", |
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55 | |
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56 | setTextDir: function(/*String*/newTextDir){ |
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57 | // summary: |
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58 | // Used for propagation and change of textDir. |
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59 | // newTextDir will be forced as textDir for all of it's children (Group/Text/TextPath). |
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60 | setTextDir(this, newTextDir); |
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61 | }, |
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62 | |
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63 | getTextDir: function(){ |
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64 | return this.textDir; |
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65 | } |
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66 | }); |
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67 | |
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68 | lang.extend(g.Group, { |
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69 | // textDir: String |
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70 | // Will be used for inheritance, or as default for text objects |
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71 | // that textDir wasn't directly specified for them but the bidi support was required. |
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72 | textDir: "", |
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73 | |
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74 | setTextDir: function(/*String*/newTextDir){ |
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75 | // summary: |
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76 | // Used for propagation and change of textDir. |
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77 | // newTextDir will be forced as textDir for all of it's children (Group/Text/TextPath). |
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78 | setTextDir(this, newTextDir); |
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79 | }, |
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80 | |
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81 | getTextDir: function(){ |
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82 | return this.textDir; |
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83 | } |
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84 | }); |
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85 | |
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86 | lang.extend(g.Text, { |
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87 | // summary: |
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88 | // Overrides some of dojox/gfx.Text properties, and adds some |
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89 | // for bidi support. |
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90 | |
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91 | // textDir: String |
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92 | // Used for displaying bidi scripts in right layout. |
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93 | // Defines the base direction of text that displayed, can have 3 values: |
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94 | // |
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95 | // 1. "ltr" - base direction is left to right. |
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96 | // 2. "rtl" - base direction is right to left. |
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97 | // 3. "auto" - base direction is contextual (defined by first strong character). |
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98 | textDir: "", |
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99 | |
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100 | formatText: function (/*String*/ text, /*String*/ textDir){ |
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101 | // summary: |
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102 | // Applies the right transform on text, according to renderer. |
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103 | // text: |
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104 | // the string for manipulation, by default return value. |
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105 | // textDir: |
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106 | // Text direction. |
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107 | // Can be: |
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108 | // |
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109 | // 1. "ltr" - for left to right layout. |
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110 | // 2. "rtl" - for right to left layout |
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111 | // 3. "auto" - for contextual layout: the first strong letter decides the direction. |
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112 | // description: |
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113 | // Finds the right transformation that should be applied on the text, according to renderer. |
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114 | // Was tested in: |
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115 | // |
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116 | // Renderers (browser for testing): |
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117 | // |
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118 | // - canvas (FF, Chrome, Safari), |
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119 | // - vml (IE), |
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120 | // - svg (FF, Chrome, Safari, Opera), |
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121 | // - silverlight (IE, Chrome, Safari, Opera), |
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122 | // - svgWeb(FF, Chrome, Safari, Opera, IE). |
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123 | // |
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124 | // Browsers [browser version that was tested]: |
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125 | // |
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126 | // - IE [6,7,8], FF [3.6], |
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127 | // - Chrome (latest for March 2011), |
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128 | // - Safari [5.0.3], |
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129 | // - Opera [11.01]. |
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130 | |
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131 | if(textDir && text && text.length > 1){ |
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132 | var sourceDir = "ltr", targetDir = textDir; |
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133 | |
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134 | if(targetDir == "auto"){ |
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135 | //is auto by default |
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136 | if(g.isVml){ |
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137 | return text; |
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138 | } |
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139 | targetDir = bidiEngine.checkContextual(text); |
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140 | } |
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141 | |
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142 | if(g.isVml){ |
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143 | sourceDir = bidiEngine.checkContextual(text); |
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144 | if(targetDir != sourceDir){ |
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145 | if(targetDir == "rtl"){ |
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146 | return !bidiEngine.hasBidiChar(text) ? bidiEngine.bidiTransform(text,"IRNNN","ILNNN") : bidi_const.RLM + bidi_const.RLM + text; |
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147 | }else{ |
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148 | return bidi_const.LRM + text; |
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149 | } |
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150 | } |
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151 | return text; |
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152 | } |
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153 | |
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154 | if(g.isSvgWeb){ |
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155 | if(targetDir == "rtl"){ |
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156 | return bidiEngine.bidiTransform(text,"IRNNN","ILNNN"); |
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157 | } |
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158 | return text; |
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159 | } |
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160 | |
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161 | if(g.isSilverlight){ |
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162 | return (targetDir == "rtl") ? bidiEngine.bidiTransform(text,"IRNNN","VLYNN") : bidiEngine.bidiTransform(text,"ILNNN","VLYNN"); |
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163 | } |
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164 | |
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165 | if(g.isCanvas){ |
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166 | return (targetDir == "rtl") ? bidi_const.RLE + text + bidi_const.PDF : bidi_const.LRE + text + bidi_const.PDF; |
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167 | } |
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168 | |
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169 | if(g.isSvg){ |
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170 | if(has("ff") < 4){ |
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171 | return (targetDir == "rtl") ? bidiEngine.bidiTransform(text,"IRYNN","VLNNN") : bidiEngine.bidiTransform(text,"ILYNN","VLNNN"); |
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172 | }else{ |
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173 | return bidi_const.LRM + (targetDir == "rtl" ? bidi_const.RLE : bidi_const.LRE) + text + bidi_const.PDF; |
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174 | } |
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175 | } |
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176 | } |
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177 | return text; |
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178 | }, |
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179 | |
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180 | bidiPreprocess: function(newShape){ |
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181 | return newShape; |
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182 | } |
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183 | }); |
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184 | |
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185 | lang.extend(g.TextPath, { |
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186 | // textDir: String |
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187 | // Used for displaying bidi scripts in right layout. |
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188 | // Defines the base direction of text that displayed, can have 3 values: |
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189 | // |
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190 | // 1. "ltr" - base direction is left to right. |
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191 | // 2. "rtl" - base direction is right to left. |
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192 | // 3. "auto" - base direction is contextual (defined by first strong character). |
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193 | textDir: "", |
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194 | |
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195 | formatText: function (/*String*/text, /*String*/textDir){ |
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196 | // summary: |
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197 | // Applies the right transform on text, according to renderer. |
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198 | // text: |
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199 | // the string for manipulation, by default return value. |
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200 | // textDir: |
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201 | // text direction direction. |
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202 | // Can be: |
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203 | // |
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204 | // 1. "ltr" - for left to right layout. |
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205 | // 2. "rtl" - for right to left layout |
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206 | // 3. "auto" - for contextual layout: the first strong letter decides the direction. |
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207 | // description: |
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208 | // Finds the right transformation that should be applied on the text, according to renderer. |
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209 | // Was tested in: |
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210 | // |
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211 | // Renderers: |
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212 | // canvas (FF, Chrome, Safari), vml (IE), svg (FF, Chrome, Safari, Opera), silverlight (IE8), svgWeb(FF, Chrome, Safari, Opera, IE). |
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213 | // |
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214 | // Browsers: |
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215 | // IE [6,7,8], FF [3.6], Chrome (latest for February 2011), Safari [5.0.3], Opera [11.01]. |
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216 | |
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217 | if(textDir && text && text.length > 1){ |
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218 | var sourceDir = "ltr", targetDir = textDir; |
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219 | |
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220 | if(targetDir == "auto"){ |
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221 | //is auto by default |
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222 | if(g.isVml){ |
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223 | return text; |
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224 | } |
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225 | targetDir = bidiEngine.checkContextual(text); |
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226 | } |
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227 | |
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228 | if(g.isVml){ |
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229 | sourceDir = bidiEngine.checkContextual(text); |
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230 | if(targetDir != sourceDir){ |
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231 | if(targetDir == "rtl"){ |
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232 | return !bidiEngine.hasBidiChar(text) ? bidiEngine.bidiTransform(text,"IRNNN","ILNNN") : bidi_const.RLM + bidi_const.RLM + text; |
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233 | }else{ |
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234 | return bidi_const.LRM + text; |
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235 | } |
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236 | } |
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237 | return text; |
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238 | } |
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239 | if(g.isSvgWeb){ |
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240 | if(targetDir == "rtl"){ |
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241 | return bidiEngine.bidiTransform(text,"IRNNN","ILNNN"); |
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242 | } |
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243 | return text; |
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244 | } |
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245 | //unlike the g.Text that is rendered in logical layout for Bidi scripts. |
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246 | //for g.TextPath in svg always visual -> bidi script is unreadable (except Opera and FF start from version 4) |
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247 | if(g.isSvg){ |
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248 | if(has("opera") || has("ff") >= 4){ |
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249 | text = bidi_const.LRM + (targetDir == "rtl"? bidi_const.RLE : bidi_const.LRE) + text + bidi_const.PDF; |
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250 | }else{ |
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251 | text = (targetDir == "rtl") ? bidiEngine.bidiTransform(text,"IRYNN","VLNNN") : bidiEngine.bidiTransform(text,"ILYNN","VLNNN"); |
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252 | } |
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253 | } |
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254 | } |
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255 | return text; |
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256 | }, |
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257 | bidiPreprocess: function(newText){ |
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258 | if(newText && (typeof newText == "string")){ |
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259 | this.origText = newText; |
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260 | newText = this.formatText(newText,this.textDir); |
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261 | } |
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262 | return newText; |
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263 | } |
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264 | }); |
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265 | |
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266 | var extendMethod = function(shape, method, before, after){ |
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267 | // summary: |
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268 | // Some helper function. Used for extending methods of shape. |
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269 | // shape: Object |
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270 | // The shape we overriding it's method. |
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271 | // method: String |
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272 | // The method that is extended, the original method is called before or after |
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273 | // functions that passed to extendMethod. |
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274 | // before: function |
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275 | // If defined this function will be executed before the original method. |
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276 | // after: function |
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277 | // If defined this function will be executed after the original method. |
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278 | var old = shape.prototype[method]; |
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279 | shape.prototype[method] = |
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280 | function(){ |
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281 | var rBefore; |
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282 | if (before){ |
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283 | rBefore = before.apply(this, arguments); |
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284 | } |
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285 | var r = old.call(this, rBefore); |
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286 | if (after){ |
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287 | r = after.call(this, r, arguments); |
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288 | } |
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289 | return r; |
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290 | }; |
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291 | }; |
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292 | |
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293 | var bidiPreprocess = function(newText){ |
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294 | if (newText){ |
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295 | if (newText.textDir){ |
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296 | newText.textDir = validateTextDir(newText.textDir); |
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297 | } |
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298 | if (newText.text && (newText.text instanceof Array)){ |
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299 | newText.text = newText.text.join(","); |
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300 | } |
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301 | } |
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302 | if(newText && (newText.text != undefined || newText.textDir) && (this.textDir != newText.textDir || newText.text != this.origText)){ |
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303 | // store the original text. |
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304 | this.origText = (newText.text != undefined) ? newText.text : this.origText; |
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305 | if(newText.textDir){ |
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306 | this.textDir = newText.textDir; |
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307 | } |
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308 | newText.text = this.formatText(this.origText,this.textDir); |
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309 | } |
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310 | return this.bidiPreprocess(newText); |
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311 | |
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312 | }; |
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313 | |
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314 | // Instead of adding bidiPreprocess to all renders one by one |
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315 | // use the extendMethod, at first there's a need for bidi transformation |
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316 | // on text then call to original setShape. |
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317 | extendMethod(g.Text,"setShape", bidiPreprocess, null); |
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318 | extendMethod(g.TextPath,"setText", bidiPreprocess, null); |
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319 | |
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320 | var restoreText = function(origObj){ |
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321 | var obj = lang.clone(origObj); |
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322 | if (obj && this.origText){ |
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323 | obj.text = this.origText; |
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324 | } |
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325 | return obj; |
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326 | }; |
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327 | |
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328 | // Instead of adding restoreText to all renders one by one |
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329 | // use the extendMethod, at first get the shape by calling the original getShape, |
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330 | // than resrore original text (without the text transformations). |
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331 | extendMethod(g.Text, "getShape", null, restoreText); |
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332 | extendMethod(g.TextPath, "getText", null, restoreText); |
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333 | |
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334 | var groupTextDir = function(group, args){ |
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335 | var textDir; |
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336 | if (args && args[0]){ |
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337 | textDir = validateTextDir(args[0]); |
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338 | } |
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339 | group.setTextDir(textDir ? textDir : this.textDir); |
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340 | return group; // dojox/gfx.Group |
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341 | }; |
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342 | |
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343 | // In creation of Group there's a need to update it's textDir, |
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344 | // so instead of doing it in renders one by one (vml vs others) |
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345 | // use the extendMethod, at first the original createGroup is applied, the |
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346 | // groupTextDir which is setts Group's textDir as it's father's or if was defined |
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347 | // by user by this value. |
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348 | extendMethod(g.Surface, "createGroup", null, groupTextDir); |
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349 | extendMethod(g.Group, "createGroup", null, groupTextDir); |
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350 | |
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351 | var textDirPreprocess = function(text){ |
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352 | // inherit from surface / group if textDir is defined there |
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353 | if(text){ |
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354 | var textDir = text.textDir ? validateTextDir(text.textDir) : this.textDir; |
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355 | if(textDir){ |
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356 | text.textDir = textDir; |
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357 | } |
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358 | } |
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359 | return text; |
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360 | }; |
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361 | |
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362 | // In creation there's a need to some preprocess, |
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363 | // so instead of doing it in renders one by one (vml vs others) |
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364 | // use the extendMethod, at first the textDirPreprocess function handles the input |
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365 | // then the original createXXXXXX is applied. |
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366 | extendMethod(g.Surface,"createText", textDirPreprocess, null); |
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367 | extendMethod(g.Surface,"createTextPath", textDirPreprocess, null); |
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368 | extendMethod(g.Group,"createText", textDirPreprocess, null); |
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369 | extendMethod(g.Group,"createTextPath", textDirPreprocess, null); |
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370 | |
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371 | /*===== |
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372 | // don't mask definition of original createSurface() function from doc parser |
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373 | g = {}; |
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374 | =====*/ |
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375 | |
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376 | g.createSurface = function(parentNode, width, height, textDir) { |
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377 | var s = g[g.renderer].createSurface(parentNode, width, height); |
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378 | var tDir = validateTextDir(textDir); |
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379 | |
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380 | if(g.isSvgWeb){ |
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381 | s.textDir = tDir ? tDir : html.style(dom.byId(parentNode),"direction"); |
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382 | return s; |
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383 | } |
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384 | // if textDir was defined use it, else get default value. |
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385 | //s.textDir = tDir ? tDir : html.style(s.rawNode,"direction"); |
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386 | if(g.isVml || g.isSvg || g.isCanvas){ |
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387 | s.textDir = tDir ? tDir : html.style(s.rawNode,"direction"); |
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388 | } |
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389 | if(g.isSilverlight){ |
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390 | // allow this once rawNode will be able for the silverlight |
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391 | //s.textDir = tDir ? tDir : dojo.style(s.rawNode,"direction"); |
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392 | s.textDir = tDir ? tDir : html.style(s._nodes[1],"direction"); |
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393 | } |
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394 | |
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395 | return s; |
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396 | }; |
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397 | /*===== g = origG; =====*/ |
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398 | |
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399 | // some helper functions |
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400 | |
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401 | function setTextDir(/*Object*/ obj, /*String*/ newTextDir){ |
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402 | var tDir = validateTextDir(newTextDir); |
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403 | if (tDir){ |
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404 | g.utils.forEach(obj,function(e){ |
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405 | if(e instanceof g.Surface || e instanceof g.Group){ |
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406 | e.textDir = tDir; |
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407 | } |
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408 | if(e instanceof g.Text){ |
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409 | e.setShape({textDir: tDir}); |
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410 | } |
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411 | if(e instanceof g.TextPath){ |
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412 | e.setText({textDir: tDir}) |
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413 | } |
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414 | }, obj); |
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415 | } |
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416 | return obj; |
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417 | } |
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418 | |
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419 | function validateTextDir(textDir){ |
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420 | var validValues = ["ltr","rtl","auto"]; |
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421 | if (textDir){ |
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422 | textDir = textDir.toLowerCase(); |
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423 | if (arr.indexOf(validValues, textDir) < 0){ |
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424 | return null; |
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425 | } |
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426 | } |
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427 | return textDir; |
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428 | } |
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429 | |
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430 | return g; // return gfx api augmented with bidi support |
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431 | }); |
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432 | |
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