1 | define(["./_base", "dojo/_base/lang","dojo/_base/declare", "./matrix", "./shape"], |
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2 | function(g, lang, declare, matrix, shapeLib){ |
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3 | |
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4 | // module: |
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5 | // dojox/gfx/path |
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6 | |
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7 | var Path = declare("dojox.gfx.path.Path", shapeLib.Shape, { |
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8 | // summary: |
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9 | // a generalized path shape |
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10 | |
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11 | constructor: function(rawNode){ |
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12 | // summary: |
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13 | // a path constructor |
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14 | // rawNode: Node |
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15 | // a DOM node to be used by this path object |
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16 | this.shape = lang.clone(g.defaultPath); |
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17 | this.segments = []; |
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18 | this.tbbox = null; |
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19 | this.absolute = true; |
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20 | this.last = {}; |
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21 | this.rawNode = rawNode; |
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22 | this.segmented = false; |
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23 | }, |
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24 | |
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25 | // mode manipulations |
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26 | setAbsoluteMode: function(mode){ |
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27 | // summary: |
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28 | // sets an absolute or relative mode for path points |
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29 | // mode: Boolean |
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30 | // true/false or "absolute"/"relative" to specify the mode |
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31 | this._confirmSegmented(); |
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32 | this.absolute = typeof mode == "string" ? (mode == "absolute") : mode; |
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33 | return this; // self |
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34 | }, |
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35 | getAbsoluteMode: function(){ |
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36 | // summary: |
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37 | // returns a current value of the absolute mode |
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38 | this._confirmSegmented(); |
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39 | return this.absolute; // Boolean |
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40 | }, |
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41 | |
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42 | getBoundingBox: function(){ |
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43 | // summary: |
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44 | // returns the bounding box {x, y, width, height} or null |
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45 | this._confirmSegmented(); |
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46 | return (this.bbox && ("l" in this.bbox)) ? {x: this.bbox.l, y: this.bbox.t, width: this.bbox.r - this.bbox.l, height: this.bbox.b - this.bbox.t} : null; // dojox/gfx.Rectangle |
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47 | }, |
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48 | |
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49 | _getRealBBox: function(){ |
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50 | // summary: |
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51 | // returns an array of four points or null |
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52 | // four points represent four corners of the untransformed bounding box |
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53 | this._confirmSegmented(); |
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54 | if(this.tbbox){ |
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55 | return this.tbbox; // Array |
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56 | } |
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57 | var bbox = this.bbox, matrix = this._getRealMatrix(); |
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58 | this.bbox = null; |
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59 | for(var i = 0, len = this.segments.length; i < len; ++i){ |
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60 | this._updateWithSegment(this.segments[i], matrix); |
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61 | } |
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62 | var t = this.bbox; |
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63 | this.bbox = bbox; |
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64 | this.tbbox = t ? [ |
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65 | {x: t.l, y: t.t}, |
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66 | {x: t.r, y: t.t}, |
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67 | {x: t.r, y: t.b}, |
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68 | {x: t.l, y: t.b} |
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69 | ] : null; |
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70 | return this.tbbox; // Array |
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71 | }, |
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72 | |
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73 | getLastPosition: function(){ |
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74 | // summary: |
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75 | // returns the last point in the path, or null |
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76 | this._confirmSegmented(); |
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77 | return "x" in this.last ? this.last : null; // Object |
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78 | }, |
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79 | |
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80 | _applyTransform: function(){ |
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81 | this.tbbox = null; |
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82 | return this.inherited(arguments); |
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83 | }, |
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84 | |
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85 | // segment interpretation |
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86 | _updateBBox: function(x, y, m){ |
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87 | // summary: |
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88 | // updates the bounding box of path with new point |
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89 | // x: Number |
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90 | // an x coordinate |
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91 | // y: Number |
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92 | // a y coordinate |
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93 | |
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94 | if(m){ |
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95 | var t = matrix.multiplyPoint(m, x, y); |
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96 | x = t.x; |
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97 | y = t.y; |
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98 | } |
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99 | |
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100 | // we use {l, b, r, t} representation of a bbox |
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101 | if(this.bbox && ("l" in this.bbox)){ |
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102 | if(this.bbox.l > x) this.bbox.l = x; |
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103 | if(this.bbox.r < x) this.bbox.r = x; |
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104 | if(this.bbox.t > y) this.bbox.t = y; |
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105 | if(this.bbox.b < y) this.bbox.b = y; |
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106 | }else{ |
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107 | this.bbox = {l: x, b: y, r: x, t: y}; |
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108 | } |
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109 | }, |
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110 | _updateWithSegment: function(segment, matrix){ |
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111 | // summary: |
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112 | // updates the bounding box of path with new segment |
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113 | // segment: Object |
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114 | // a segment |
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115 | var n = segment.args, l = n.length, i; |
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116 | // update internal variables: bbox, absolute, last |
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117 | switch(segment.action){ |
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118 | case "M": |
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119 | case "L": |
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120 | case "C": |
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121 | case "S": |
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122 | case "Q": |
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123 | case "T": |
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124 | for(i = 0; i < l; i += 2){ |
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125 | this._updateBBox(n[i], n[i + 1], matrix); |
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126 | } |
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127 | this.last.x = n[l - 2]; |
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128 | this.last.y = n[l - 1]; |
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129 | this.absolute = true; |
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130 | break; |
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131 | case "H": |
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132 | for(i = 0; i < l; ++i){ |
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133 | this._updateBBox(n[i], this.last.y, matrix); |
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134 | } |
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135 | this.last.x = n[l - 1]; |
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136 | this.absolute = true; |
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137 | break; |
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138 | case "V": |
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139 | for(i = 0; i < l; ++i){ |
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140 | this._updateBBox(this.last.x, n[i], matrix); |
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141 | } |
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142 | this.last.y = n[l - 1]; |
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143 | this.absolute = true; |
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144 | break; |
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145 | case "m": |
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146 | var start = 0; |
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147 | if(!("x" in this.last)){ |
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148 | this._updateBBox(this.last.x = n[0], this.last.y = n[1], matrix); |
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149 | start = 2; |
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150 | } |
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151 | for(i = start; i < l; i += 2){ |
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152 | this._updateBBox(this.last.x += n[i], this.last.y += n[i + 1], matrix); |
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153 | } |
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154 | this.absolute = false; |
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155 | break; |
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156 | case "l": |
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157 | case "t": |
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158 | for(i = 0; i < l; i += 2){ |
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159 | this._updateBBox(this.last.x += n[i], this.last.y += n[i + 1], matrix); |
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160 | } |
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161 | this.absolute = false; |
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162 | break; |
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163 | case "h": |
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164 | for(i = 0; i < l; ++i){ |
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165 | this._updateBBox(this.last.x += n[i], this.last.y, matrix); |
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166 | } |
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167 | this.absolute = false; |
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168 | break; |
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169 | case "v": |
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170 | for(i = 0; i < l; ++i){ |
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171 | this._updateBBox(this.last.x, this.last.y += n[i], matrix); |
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172 | } |
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173 | this.absolute = false; |
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174 | break; |
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175 | case "c": |
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176 | for(i = 0; i < l; i += 6){ |
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177 | this._updateBBox(this.last.x + n[i], this.last.y + n[i + 1], matrix); |
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178 | this._updateBBox(this.last.x + n[i + 2], this.last.y + n[i + 3], matrix); |
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179 | this._updateBBox(this.last.x += n[i + 4], this.last.y += n[i + 5], matrix); |
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180 | } |
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181 | this.absolute = false; |
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182 | break; |
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183 | case "s": |
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184 | case "q": |
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185 | for(i = 0; i < l; i += 4){ |
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186 | this._updateBBox(this.last.x + n[i], this.last.y + n[i + 1], matrix); |
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187 | this._updateBBox(this.last.x += n[i + 2], this.last.y += n[i + 3], matrix); |
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188 | } |
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189 | this.absolute = false; |
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190 | break; |
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191 | case "A": |
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192 | for(i = 0; i < l; i += 7){ |
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193 | this._updateBBox(n[i + 5], n[i + 6], matrix); |
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194 | } |
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195 | this.last.x = n[l - 2]; |
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196 | this.last.y = n[l - 1]; |
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197 | this.absolute = true; |
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198 | break; |
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199 | case "a": |
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200 | for(i = 0; i < l; i += 7){ |
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201 | this._updateBBox(this.last.x += n[i + 5], this.last.y += n[i + 6], matrix); |
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202 | } |
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203 | this.absolute = false; |
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204 | break; |
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205 | } |
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206 | // add an SVG path segment |
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207 | var path = [segment.action]; |
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208 | for(i = 0; i < l; ++i){ |
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209 | path.push(g.formatNumber(n[i], true)); |
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210 | } |
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211 | if(typeof this.shape.path == "string"){ |
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212 | this.shape.path += path.join(""); |
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213 | }else{ |
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214 | for(i = 0, l = path.length; i < l; ++i){ |
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215 | this.shape.path.push(path[i]); |
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216 | } |
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217 | } |
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218 | }, |
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219 | |
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220 | // a dictionary, which maps segment type codes to a number of their arguments |
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221 | _validSegments: {m: 2, l: 2, h: 1, v: 1, c: 6, s: 4, q: 4, t: 2, a: 7, z: 0}, |
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222 | |
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223 | _pushSegment: function(action, args){ |
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224 | // summary: |
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225 | // adds a segment |
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226 | // action: String |
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227 | // valid SVG code for a segment's type |
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228 | // args: Array |
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229 | // a list of parameters for this segment |
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230 | this.tbbox = null; |
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231 | var group = this._validSegments[action.toLowerCase()], segment; |
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232 | if(typeof group == "number"){ |
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233 | if(group){ |
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234 | if(args.length >= group){ |
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235 | segment = {action: action, args: args.slice(0, args.length - args.length % group)}; |
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236 | this.segments.push(segment); |
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237 | this._updateWithSegment(segment); |
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238 | } |
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239 | }else{ |
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240 | segment = {action: action, args: []}; |
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241 | this.segments.push(segment); |
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242 | this._updateWithSegment(segment); |
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243 | } |
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244 | } |
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245 | }, |
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246 | |
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247 | _collectArgs: function(array, args){ |
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248 | // summary: |
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249 | // converts an array of arguments to plain numeric values |
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250 | // array: Array |
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251 | // an output argument (array of numbers) |
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252 | // args: Array |
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253 | // an input argument (can be values of Boolean, Number, dojox/gfx.Point, or an embedded array of them) |
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254 | for(var i = 0; i < args.length; ++i){ |
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255 | var t = args[i]; |
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256 | if(typeof t == "boolean"){ |
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257 | array.push(t ? 1 : 0); |
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258 | }else if(typeof t == "number"){ |
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259 | array.push(t); |
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260 | }else if(t instanceof Array){ |
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261 | this._collectArgs(array, t); |
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262 | }else if("x" in t && "y" in t){ |
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263 | array.push(t.x, t.y); |
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264 | } |
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265 | } |
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266 | }, |
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267 | |
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268 | // segments |
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269 | moveTo: function(){ |
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270 | // summary: |
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271 | // forms a move segment |
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272 | this._confirmSegmented(); |
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273 | var args = []; |
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274 | this._collectArgs(args, arguments); |
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275 | this._pushSegment(this.absolute ? "M" : "m", args); |
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276 | return this; // self |
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277 | }, |
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278 | lineTo: function(){ |
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279 | // summary: |
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280 | // forms a line segment |
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281 | this._confirmSegmented(); |
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282 | var args = []; |
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283 | this._collectArgs(args, arguments); |
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284 | this._pushSegment(this.absolute ? "L" : "l", args); |
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285 | return this; // self |
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286 | }, |
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287 | hLineTo: function(){ |
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288 | // summary: |
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289 | // forms a horizontal line segment |
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290 | this._confirmSegmented(); |
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291 | var args = []; |
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292 | this._collectArgs(args, arguments); |
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293 | this._pushSegment(this.absolute ? "H" : "h", args); |
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294 | return this; // self |
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295 | }, |
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296 | vLineTo: function(){ |
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297 | // summary: |
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298 | // forms a vertical line segment |
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299 | this._confirmSegmented(); |
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300 | var args = []; |
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301 | this._collectArgs(args, arguments); |
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302 | this._pushSegment(this.absolute ? "V" : "v", args); |
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303 | return this; // self |
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304 | }, |
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305 | curveTo: function(){ |
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306 | // summary: |
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307 | // forms a curve segment |
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308 | this._confirmSegmented(); |
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309 | var args = []; |
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310 | this._collectArgs(args, arguments); |
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311 | this._pushSegment(this.absolute ? "C" : "c", args); |
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312 | return this; // self |
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313 | }, |
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314 | smoothCurveTo: function(){ |
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315 | // summary: |
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316 | // forms a smooth curve segment |
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317 | this._confirmSegmented(); |
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318 | var args = []; |
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319 | this._collectArgs(args, arguments); |
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320 | this._pushSegment(this.absolute ? "S" : "s", args); |
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321 | return this; // self |
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322 | }, |
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323 | qCurveTo: function(){ |
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324 | // summary: |
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325 | // forms a quadratic curve segment |
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326 | this._confirmSegmented(); |
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327 | var args = []; |
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328 | this._collectArgs(args, arguments); |
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329 | this._pushSegment(this.absolute ? "Q" : "q", args); |
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330 | return this; // self |
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331 | }, |
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332 | qSmoothCurveTo: function(){ |
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333 | // summary: |
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334 | // forms a quadratic smooth curve segment |
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335 | this._confirmSegmented(); |
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336 | var args = []; |
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337 | this._collectArgs(args, arguments); |
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338 | this._pushSegment(this.absolute ? "T" : "t", args); |
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339 | return this; // self |
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340 | }, |
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341 | arcTo: function(){ |
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342 | // summary: |
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343 | // forms an elliptic arc segment |
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344 | this._confirmSegmented(); |
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345 | var args = []; |
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346 | this._collectArgs(args, arguments); |
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347 | this._pushSegment(this.absolute ? "A" : "a", args); |
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348 | return this; // self |
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349 | }, |
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350 | closePath: function(){ |
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351 | // summary: |
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352 | // closes a path |
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353 | this._confirmSegmented(); |
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354 | this._pushSegment("Z", []); |
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355 | return this; // self |
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356 | }, |
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357 | |
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358 | _confirmSegmented: function() { |
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359 | if (!this.segmented) { |
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360 | var path = this.shape.path; |
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361 | // switch to non-updating version of path building |
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362 | this.shape.path = []; |
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363 | this._setPath(path); |
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364 | // switch back to the string path |
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365 | this.shape.path = this.shape.path.join(""); |
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366 | // become segmented |
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367 | this.segmented = true; |
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368 | } |
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369 | }, |
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370 | |
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371 | // setShape |
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372 | _setPath: function(path){ |
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373 | // summary: |
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374 | // forms a path using an SVG path string |
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375 | // path: String |
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376 | // an SVG path string |
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377 | var p = lang.isArray(path) ? path : path.match(g.pathSvgRegExp); |
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378 | this.segments = []; |
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379 | this.absolute = true; |
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380 | this.bbox = {}; |
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381 | this.last = {}; |
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382 | if(!p) return; |
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383 | // create segments |
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384 | var action = "", // current action |
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385 | args = [], // current arguments |
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386 | l = p.length; |
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387 | for(var i = 0; i < l; ++i){ |
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388 | var t = p[i], x = parseFloat(t); |
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389 | if(isNaN(x)){ |
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390 | if(action){ |
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391 | this._pushSegment(action, args); |
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392 | } |
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393 | args = []; |
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394 | action = t; |
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395 | }else{ |
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396 | args.push(x); |
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397 | } |
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398 | } |
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399 | this._pushSegment(action, args); |
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400 | }, |
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401 | setShape: function(newShape){ |
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402 | // summary: |
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403 | // forms a path using a shape |
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404 | // newShape: Object |
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405 | // an SVG path string or a path object (see dojox/gfx.defaultPath) |
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406 | this.inherited(arguments, [typeof newShape == "string" ? {path: newShape} : newShape]); |
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407 | |
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408 | this.segmented = false; |
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409 | this.segments = []; |
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410 | if(!g.lazyPathSegmentation){ |
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411 | this._confirmSegmented(); |
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412 | } |
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413 | return this; // self |
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414 | }, |
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415 | |
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416 | // useful constant for descendants |
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417 | _2PI: Math.PI * 2 |
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418 | }); |
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419 | |
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420 | var TextPath = declare("dojox.gfx.path.TextPath", Path, { |
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421 | // summary: |
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422 | // a generalized TextPath shape |
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423 | |
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424 | constructor: function(rawNode){ |
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425 | // summary: |
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426 | // a TextPath shape constructor |
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427 | // rawNode: Node |
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428 | // a DOM node to be used by this TextPath object |
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429 | if(!("text" in this)){ |
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430 | this.text = lang.clone(g.defaultTextPath); |
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431 | } |
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432 | if(!("fontStyle" in this)){ |
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433 | this.fontStyle = lang.clone(g.defaultFont); |
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434 | } |
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435 | }, |
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436 | getText: function(){ |
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437 | // summary: |
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438 | // returns the current text object or null |
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439 | return this.text; // Object |
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440 | }, |
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441 | setText: function(newText){ |
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442 | // summary: |
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443 | // sets a text to be drawn along the path |
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444 | this.text = g.makeParameters(this.text, |
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445 | typeof newText == "string" ? {text: newText} : newText); |
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446 | this._setText(); |
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447 | return this; // self |
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448 | }, |
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449 | getFont: function(){ |
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450 | // summary: |
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451 | // returns the current font object or null |
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452 | return this.fontStyle; // Object |
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453 | }, |
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454 | setFont: function(newFont){ |
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455 | // summary: |
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456 | // sets a font for text |
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457 | this.fontStyle = typeof newFont == "string" ? |
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458 | g.splitFontString(newFont) : |
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459 | g.makeParameters(g.defaultFont, newFont); |
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460 | this._setFont(); |
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461 | return this; // self |
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462 | } |
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463 | }); |
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464 | |
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465 | /*===== |
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466 | g.Path = Path; |
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467 | g.TextPath = TextPath; |
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468 | =====*/ |
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469 | |
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470 | return g.path = { |
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471 | // summary: |
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472 | // This module contains the core graphics Path API. |
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473 | // Path command format follows the W3C SVG 1.0 Path api. |
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474 | |
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475 | Path: Path, |
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476 | TextPath: TextPath |
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477 | }; |
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478 | }); |
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