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237
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1 /* Copyright (C) 2003,2004 WTWG, Uni Bern and others
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2
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3 This program is free software; you can redistribute it and/or
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4 modify it under the terms of the GNU General Public License
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5 as published by the Free Software Foundation; either version 2
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6 of the License, or (at your option) any later version.
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7
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8 This program is distributed in the hope that it will be useful,
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9 but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program; if not, write to the Free Software
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15 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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16
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17 Authors: ROC 03.06.2004
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18 first version by Christian Luginbuehl, 01.05.2003
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19 Changed for digiLib in Zope by DW 24.03.2004
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20 */
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21
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241
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22 function getInt(n) {
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237
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23 // returns always an integer
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241
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24 n = parseInt(n);
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25 if (isNaN(n)) return 0;
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237
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26 return n;
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27 }
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28
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29 function defined(x) {
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30 // returns if x is defined
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31 return (typeof arguments[0] != "undefined");
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32 }
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33
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34 // auxiliary function to crop senseless precision
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35 function cropFloat(x) {
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36 return parseInt(10000*x)/10000;
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37 }
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38
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39 // browser sniffer
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40 var browserType = Object();
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41 browserType.doDHTML = false;
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42 browserType.versIE = 0;
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43
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44 if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
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45 var vers = navigator.appVersion.split('MSIE ');
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46 vers = vers[vers.length - 1];
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47 browserType.versIE = getInt(vers);
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48 browserType.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
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49 browserType.isMac = navigator.platform.indexOf('Mac') >= 0;
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50 browserType.isWin = navigator.platform.indexOf('Win') >= 0;
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51 browserType.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! browserType.isIE;
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52 browserType.isIEWin = browserType.versIE > 0 && browserType.isWin;
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53 if (navigator.appVersion.indexOf('MSIE') < 0 || ! browserType.isMac || browserType.versIE >= 5) {
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54 browserType.doDHTML = true;
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55 browserType.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
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56 browserType.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
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57 }
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58 }
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59
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60 // fixes for javascript < 1.2
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61 if (! Array.prototype.push) {
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62 Array.prototype.push = function(val) {
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63 this[this.length] = val;
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64 return this.length;
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65 }
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66 Array.prototype.pop = function() {
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67 var val = this[this.length-1];
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68 this.length -= 1;
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69 return val;
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70 }
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71 }
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72
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73
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74 /* **********************************************
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75 * geometry classes
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76 * ******************************************** */
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77
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78 /*
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79 * Size class
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80 */
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81 function Size(w, h) {
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82 this.width = parseFloat(w);
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83 this.height = parseFloat(h);
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84 return this;
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85 }
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86
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87 /*
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88 * Position class
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89 */
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90 function Position(x, y) {
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91 this.x = parseFloat(x);
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92 this.y = parseFloat(y);
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93 return this;
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94 }
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95
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96 /*
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97 * Rectangle class
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98 */
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99 function Rectangle(x, y, w, h) {
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100 this.x = parseFloat(x);
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101 this.y = parseFloat(y);
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102 this.width = parseFloat(w);
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103 this.height = parseFloat(h);
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104 return this;
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105 }
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106 Rectangle.prototype.copy = function() {
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107 // returns a copy of this Rectangle
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108 return new Rectangle(this.x, this.y, this.width, this.height);
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109 }
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110 Rectangle.prototype.getPosition = function() {
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111 // returns the position of this Rectangle
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112 return new Position(this.x, this.y);
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113 }
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114 Rectangle.prototype.getSize = function() {
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115 // returns the size of this Rectangle
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116 return new Size(this.width, this.height);
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117 }
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118 Rectangle.prototype.getArea = function() {
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119 // returns the area of this Rectangle
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120 return (this.width * this.height);
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121 }
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122 Rectangle.prototype.containsPosition = function(pos) {
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123 // returns if the given Position lies in this Rectangle
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124 return ((pos.x >= this.x)&&(pos.y >= this.y)&&(pos.x <= this.x+this.width)&&(pos.y <= this.y+this.width));
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125 }
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126 Rectangle.prototype.intersect = function(rect) {
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127 // returns the intersection of the given Rectangle and this one
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128 var sec = rect.copy();
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129 if (sec.x < this.x) {
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130 sec.width = sec.width - (this.x - sec.x);
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131 sec.x = this.x;
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132 }
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133 if (sec.y < this.y) {
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134 sec.height = sec.height - (this.y - sec.y);
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135 sec.y = this.y;
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136 }
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137 if (sec.x + sec.width > this.x + this.width) {
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138 sec.width = (this.x + this.width) - sec.x;
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139 }
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140 if (sec.y + sec.height > this.y + this.height) {
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141 sec.height = (this.y + this.height) - sec.y;
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142 }
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143 return sec;
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144 }
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145 Rectangle.prototype.fit = function(rect) {
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146 // returns a Rectangle that fits into this one (by moving first)
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147 var sec = rect.copy();
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148 sec.x = Math.max(sec.x, this.x);
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149 sec.x = Math.max(sec.x, this.x);
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150 if (sec.x + sec.width > this.x + this.width) {
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151 sec.x = this.x + this.width - sec.width;
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152 }
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153 if (sec.y + sec.height > this.y + this.height) {
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154 sec.y = this.y + this.height - sec.height;
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155 }
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156 return sec.intersect(this);
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157 }
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158
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159 /*
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160 * Transform class
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161 *
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162 * defines a class of affine transformations
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163 */
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164 function Transform() {
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165 this.m00 = 1.0;
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166 this.m01 = 0.0;
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167 this.m02 = 0.0;
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168 this.m10 = 0.0;
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169 this.m11 = 1.0;
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170 this.m12 = 0.0;
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171 this.m20 = 0.0;
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172 this.m21 = 0.0;
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173 this.m22 = 1.0;
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174 return this;
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175 }
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176 Transform.prototype.concat = function(traf) {
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177 // add Transform traf to this Transform
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178 for (var i = 0; i < 3; i++) {
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179 for (var j = 0; j < 3; j++) {
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180 var c = 0.0;
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181 for (var k = 0; k < 3; k++) {
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182 c += traf["m"+i+k] * this["m"+k+j];
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183 }
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184 this["m"+i+j] = c;
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185 }
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186 }
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187 return this;
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188 }
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189 Transform.prototype.transform = function(rect) {
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190 // returns transformed Rectangle or Position with this Transform applied
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191 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
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192 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
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193 if (rect.width) {
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194 var width = this.m00 * rect.width + this.m01 * rect.height;
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195 var height = this.m10 * rect.width + this.m11 * rect.height;
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196 return new Rectangle(x, y, width, height);
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197 }
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198 return new Position(x, y);
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199 }
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200 Transform.prototype.invtransform = function(pos) {
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201 // returns transformed Position pos with the inverse of this Transform applied
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202 var det = this.m00 * this.m11 - this.m01 * this.m10;
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203 var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
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204 var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
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205 return new Position(x, y);
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206 }
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207 function getRotation(angle, pos) {
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208 // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
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209 var traf = new Transform();
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210 if (angle != 0) {
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211 var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
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212 traf.m00 = Math.cos(t);
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213 traf.m01 = - Math.sin(t);
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214 traf.m10 = Math.sin(t);
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215 traf.m11 = Math.cos(t);
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216 traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
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217 traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
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218 }
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219 return traf;
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220 }
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221 function getTranslation(pos) {
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222 // returns a Transform that is a translation by [pos.x, pos,y]
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223 var traf = new Transform();
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224 traf.m02 = pos.x;
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225 traf.m12 = pos.y;
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226 return traf;
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227 }
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228 function getScale(size) {
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229 // returns a Transform that is a scale by [size.width, size.height]
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230 var traf = new Transform();
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231 traf.m00 = size.width;
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232 traf.m11 = size.height;
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233 return traf;
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234 }
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235
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236
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237 /* **********************************************
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238 * parameter routines
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239 * ******************************************** */
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240
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241 var dlParams = new Object();
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242
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243 function newParameter(name, defaultValue, detail) {
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244 // create a new parameter with a name and a default value
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245 if (defined(dlParams[name])) {
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246 alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
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247 return false;
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248 } else {
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249 dlParams[name] = new Object();
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250 dlParams[name].defaultValue = defaultValue;
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251 dlParams[name].hasValue = false;
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252 dlParams[name].value = defaultValue;
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253 dlParams[name].detail = detail;
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254 return dlParams[name];
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255 }
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256 }
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257
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258 function getParameter(name) {
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259 // returns the named parameter value or its default value
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260 if (defined(dlParams[name])) {
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261 if (dlParams[name].hasValue) {
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262 return dlParams[name].value;
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263 } else {
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264 return dlParams[name].defaultValue;
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265 }
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266 } else {
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267 return null;
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268 }
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269 }
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270
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271 function setParameter(name, value) {
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272 // sets parameter value
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273 if (defined(dlParams[name])) {
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274 dlParams[name].value = value;
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275 dlParams[name].hasValue = true;
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276 return true;
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277 }
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278 return false;
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279 }
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280
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281 function getAllParameters(detail) {
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282 // returns a string of all parameters in query format
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283 if (! detail) {
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284 detail = 10;
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285 }
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286 var params = new Array();
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287 for ( param in dlParams ) {
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288 if ((dlParams[param].detail <= detail)&&(dlParams[param].hasValue)) {
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289 var val = getParameter(param);
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290 if (val != "") {
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291 params.push(param + "=" + val);
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292 }
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293 }
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294 }
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295 return params.join("&");
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296 }
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297
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298 function parseParameters(query) {
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299 // gets parameter values from query format string
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300 var params = query.split("&");
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301 for (var i = 0; i < params.length; i++) {
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302 var keyval = params[i].split("=");
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303 if (keyval.length == 2) {
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304 setParameter(keyval[0], keyval[1]);
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305 }
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306 }
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307 }
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308
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309
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310 /* **********************************************
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311 * HTML/DOM routines
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312 * ******************************************** */
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313
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314 function getElement(tagid, quiet) {
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315 // returns the element object with the id tagid
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316 var e;
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317 if (document.getElementById) {
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318 e = document.getElementById(tagid);
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319 } else if (document.all) {
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320 alert("document.all!");
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321 e = document.all[tagid];
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322 } else if (document.layers) {
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323 e = document.layers[tagid];
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324 }
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325 if (e) {
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326 return e;
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327 } else {
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328 if (! quiet) {
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329 alert("unable to find element: "+tagid);
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330 }
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331 return null;
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332 }
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333 }
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334
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335 function getElementPosition(elem) {
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336 // returns a Position with the position of the element
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337 var x = 0;
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338 var y = 0;
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339 if (defined(elem.offsetLeft)) {
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340 var e = elem;
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341 while (e) {
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342 if (defined(e.clientLeft)) {
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343 // special for IE
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344 if (browserType.isMac) {
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345 if (e.offsetParent.tagName == "BODY") {
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346 // IE for Mac extraspecial
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347 x += e.clientLeft;
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348 y += e.clientTop;
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349 break;
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350 }
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351 } else {
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352 if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
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353 x += e.clientLeft;
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354 y += e.clientTop;
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355 }
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356 }
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357 }
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358 x += e.offsetLeft;
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359 y += e.offsetTop;
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360 e = e.offsetParent;
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361 }
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362 } else if (defined(elem.x)) {
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363 x = elem.x;
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364 y = elem.y;
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365 } else if (defined(elem.pageX)) {
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366 x = elem.pageX;
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367 y = elem.pageY;
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368 } else {
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369 alert("unable to get position of "+elem+" (id:"+elem.id+")");
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370 }
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371 return new Position(getInt(x), getInt(y));
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372 }
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373
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374 function getElementSize(elem) {
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375 // returns a Rectangle with the size of the element
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376 var width = 0;
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377 var height = 0;
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378 if (defined(elem.offsetWidth)) {
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379 width = elem.offsetWidth;
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380 height = elem.offsetHeight;
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381 } else if (defined(elem.width)) {
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382 width = elem.width;
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383 height = elem.height;
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384 } else if (defined(elem.clip.width)) {
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385 width = elem.clip.width;
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386 height = elem.clip.height;
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387 } else {
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388 alert("unable to get size of "+elem+" (id:"+elem.id+")");
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389 }
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390 return new Size(getInt(width), getInt(height));
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391 }
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392
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393 function getElementRect(elem) {
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394 // returns a Rectangle with the size and position of the element
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395 var pos = getElementPosition(elem);
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396 var size = getElementSize(elem);
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397 return new Rectangle(pos.x, pos.y, size.width, size.height);
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398 }
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399
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400
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401
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402 function moveElement(elem, rect) {
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403 // moves and sizes the element
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404 if (elem.style) {
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405 if (defined(rect.x)) {
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406 elem.style.left = Math.round(rect.x) + "px";
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407 elem.style.top = Math.round(rect.y) + "px";
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408 }
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409 if (defined(rect.width)) {
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410 elem.style.width = Math.round(rect.width) + "px";
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411 elem.style.height = Math.round(rect.height) + "px";
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412 }
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413 } else if (document.layers) {
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414 if (defined(rect.x)) {
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415 elem.pageX = getInt(rect.x);
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416 elem.pageY = getInt(rect.y);
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417 }
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418 if (defined(rect.width)) {
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419 elem.clip.width = getInt(rect.width);
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420 elem.clip.height = getInt(rect.height);
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421 }
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422 } else {
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423 alert("moveelement: no style nor layer property!");
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424 return false;
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425 }
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426 return true;
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427 }
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428
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429 function showElement(elem, show) {
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430 // shows or hides the element
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431 if (elem.style) {
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432 if (show) {
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433 elem.style.visibility = "visible";
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434 } else {
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435 elem.style.visibility = "hidden";
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436 }
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437 } else if (defined(elem.visibility)) {
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438 if (show) {
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439 elem.visibility = "show";
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440 } else {
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441 elem.visibility = "hide";
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442 }
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443 } else {
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444 alert("showelement: no style nor layer property!");
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445 }
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446 return true;
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447 }
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448
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449 function evtPosition(evt) {
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450 // returns the on-screen Position of the Event
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451 var x;
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452 var y;
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453 evt = (evt) ? evt : window.event;
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454 if (!evt) {
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455 alert("no event found! "+evt);
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456 return;
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457 }
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458 if (defined(evt.pageX)) {
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459 x = parseInt(evt.pageX);
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460 y = parseInt(evt.pageY);
|
|
|
461 } else if (defined(evt.clientX)) {
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462 x = parseInt(document.body.scrollLeft+evt.clientX);
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463 y = parseInt(document.body.scrollTop+evt.clientY);
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|
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464 } else {
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465 alert("evtPosition: don't know how to deal with "+evt);
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|
|
466 }
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|
|
467 return new Position(x, y);
|
|
|
468 }
|
|
|
469
|
|
|
470 function registerMouseDown(elem, handler) {
|
|
|
471 // register a mouse down event handler on the indicated element
|
|
|
472 if (elem.addEventListener) {
|
|
|
473 elem.addEventListener("mousedown", handler, false);
|
|
|
474 } else {
|
|
|
475 if (elem.captureEvents) {
|
|
|
476 elem.captureEvents(Event.MOUSEDOWN);
|
|
|
477 }
|
|
|
478 elem.onmousedown = handler;
|
|
|
479 }
|
|
|
480 return true;
|
|
|
481 }
|
|
|
482
|
|
|
483 function unregisterMouseDown(elem, handler) {
|
|
|
484 // unregister the mouse down event handler
|
|
|
485 if (elem.removeEventListener) {
|
|
|
486 elem.removeEventListener("mousedown", handler, false);
|
|
|
487 } else {
|
|
|
488 if (elem.releaseEvents) {
|
|
|
489 elem.releaseEvents(Event.MOUSEDOWN);
|
|
|
490 }
|
|
|
491 elem.onmousedown = null;
|
|
|
492 }
|
|
|
493 return true;
|
|
|
494 }
|
|
|
495
|
|
|
496 function registerMouseMove(elem, handler) {
|
|
|
497 // register a mouse move event handler on the indicated element
|
|
|
498 if (elem.addEventListener) {
|
|
|
499 elem.addEventListener("mousemove", handler, false);
|
|
|
500 } else {
|
|
|
501 if (elem.captureEvents) {
|
|
|
502 elem.captureEvents(Event.MOUSEMOVE);
|
|
|
503 }
|
|
|
504 elem.onmousemove = handler;
|
|
|
505 }
|
|
|
506 return true;
|
|
|
507 }
|
|
|
508
|
|
|
509 function unregisterMouseMove(elem, handler) {
|
|
|
510 // unregister the mouse move event handler
|
|
|
511 if (elem.removeEventListener) {
|
|
|
512 elem.removeEventListener("mousemove", handler, false);
|
|
|
513 } else {
|
|
|
514 if (elem.releaseEvents) {
|
|
|
515 elem.releaseEvents(Event.MOUSEMOVE);
|
|
|
516 }
|
|
|
517 elem.onmousemove = null;
|
|
|
518 }
|
|
|
519 return true;
|
|
|
520 }
|
|
|
521
|
|
|
522 function registerKeyDown(handler) {
|
|
|
523 // register a key down handler
|
|
|
524 if ( document.addEventListener ) {
|
|
|
525 this.document.addEventListener('keypress', handler, false);
|
|
|
526 } else {
|
|
|
527 if (elem.captureEvents) {
|
|
|
528 elem.captureEvents(Event.MOUSEDOWN);
|
|
|
529 }
|
|
|
530 this.document.onkeypress = handler
|
|
|
531 }
|
|
|
532 return true;
|
|
|
533 }
|
|
|
534
|
|
|
535 function getWinSize() {
|
|
|
536 // returns a Size with the current window size (mostly from www.quirksmode.org)
|
|
|
537 var wsize = new Size(100, 100);
|
|
|
538 if (defined(self.innerHeight)) {
|
|
|
539 // all except Explorer
|
|
|
540 wsize.width = self.innerWidth;
|
|
|
541 wsize.height = self.innerHeight;
|
|
|
542 } else if (document.documentElement && document.documentElement.clientHeight) {
|
|
|
543 // Explorer 6 Strict Mode
|
|
|
544 wsize.width = document.documentElement.clientWidth;
|
|
|
545 wsize.height = document.documentElement.clientHeight;
|
|
|
546 } else if (document.body) {
|
|
|
547 // other Explorers
|
|
|
548 wsize.width = document.body.clientWidth;
|
|
|
549 wsize.height = document.body.clientHeight;
|
|
|
550 }
|
|
|
551 return wsize;
|
|
|
552 }
|
|
|
553
|
|
|
554 function openWin(url, title, params) {
|
|
|
555 // open browser window
|
|
|
556 var ow = window.open(url, title, params);
|
|
|
557 ow.focus();
|
|
|
558 }
|
