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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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22 function getInt (n) {
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23 // returns always an integer
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24 n = parseInt (n);
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25 if (isNaN (n))
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26 return 0;
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27 return n;
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28 }
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29
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30 function defined(x) {
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31 // returns if x is defined
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32 return (typeof arguments[0] != "undefined");
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33 }
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34
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35 // auxiliary function to crop senseless precision
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36 function cropFloat(x) {
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37 return parseInt(10000*x)/10000;
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38 }
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39
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40 // browser sniffer
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41 var browserType = Object();
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42 browserType.doDHTML = false;
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43 browserType.versIE = 0;
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44
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45 if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
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46 var vers = navigator.appVersion.split('MSIE ');
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47 vers = vers[vers.length - 1];
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48 browserType.versIE = getInt(vers);
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49 browserType.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
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50 browserType.isMac = navigator.platform.indexOf('Mac') >= 0;
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51 browserType.isWin = navigator.platform.indexOf('Win') >= 0;
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52 browserType.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! browserType.isIE;
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53 browserType.isIEWin = browserType.versIE > 0 && browserType.isWin;
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54 if (navigator.appVersion.indexOf('MSIE') < 0 || ! browserType.isMac || browserType.versIE >= 5) {
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55 browserType.doDHTML = true;
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56 browserType.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
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57 browserType.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
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58 }
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59 }
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60
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61 // fixes for javascript < 1.2
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62 if (! Array.prototype.push) {
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63 Array.prototype.push = function(val) {
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64 this[this.length] = val;
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65 return this.length;
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66 }
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67 Array.prototype.pop = function() {
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68 var val = this[this.length-1];
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69 this.length -= 1;
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70 return val;
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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 /* **********************************************
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76 * geometry classes
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77 * ******************************************** */
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78
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79 /*
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80 * Size class
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81 */
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82 function Size(w, h) {
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83 this.width = parseFloat(w);
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84 this.height = parseFloat(h);
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85 return this;
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86 }
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87
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88 /*
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89 * Position class
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90 */
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91 function Position(x, y) {
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92 this.x = parseFloat(x);
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93 this.y = parseFloat(y);
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94 return this;
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95 }
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96
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97 /*
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98 * Rectangle class
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99 */
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100 function Rectangle(x, y, w, h) {
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101 this.x = parseFloat(x);
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102 this.y = parseFloat(y);
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103 this.width = parseFloat(w);
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104 this.height = parseFloat(h);
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105 return this;
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106 }
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107 Rectangle.prototype.copy = function() {
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108 // returns a copy of this Rectangle
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109 return new Rectangle(this.x, this.y, this.width, this.height);
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110 }
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111 Rectangle.prototype.getPosition = function() {
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112 // returns the position of this Rectangle
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113 return new Position(this.x, this.y);
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114 }
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115 Rectangle.prototype.getSize = function() {
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116 // returns the size of this Rectangle
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117 return new Size(this.width, this.height);
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118 }
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119 Rectangle.prototype.getArea = function() {
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120 // returns the area of this Rectangle
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121 return (this.width * this.height);
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122 }
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123 Rectangle.prototype.containsPosition = function(pos) {
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124 // returns if the given Position lies in this Rectangle
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125 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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126 }
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127 Rectangle.prototype.intersect = function(rect) {
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128 // returns the intersection of the given Rectangle and this one
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129 var sec = rect.copy();
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130 if (sec.x < this.x) {
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131 sec.width = sec.width - (this.x - sec.x);
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132 sec.x = this.x;
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133 }
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134 if (sec.y < this.y) {
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135 sec.height = sec.height - (this.y - sec.y);
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136 sec.y = this.y;
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137 }
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138 if (sec.x + sec.width > this.x + this.width) {
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139 sec.width = (this.x + this.width) - sec.x;
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140 }
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141 if (sec.y + sec.height > this.y + this.height) {
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142 sec.height = (this.y + this.height) - sec.y;
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143 }
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144 return sec;
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145 }
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146 Rectangle.prototype.fit = function(rect) {
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147 // returns a Rectangle that fits into this one (by moving first)
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148 var sec = rect.copy();
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149 sec.x = Math.max(sec.x, this.x);
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150 sec.x = Math.max(sec.x, this.x);
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151 if (sec.x + sec.width > this.x + this.width) {
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152 sec.x = this.x + this.width - sec.width;
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153 }
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154 if (sec.y + sec.height > this.y + this.height) {
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155 sec.y = this.y + this.height - sec.height;
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156 }
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157 return sec.intersect(this);
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158 }
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159
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160 /*
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161 * Transform class
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162 *
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163 * defines a class of affine transformations
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164 */
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165 function Transform() {
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166 this.m00 = 1.0;
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167 this.m01 = 0.0;
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168 this.m02 = 0.0;
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169 this.m10 = 0.0;
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170 this.m11 = 1.0;
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171 this.m12 = 0.0;
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172 this.m20 = 0.0;
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173 this.m21 = 0.0;
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174 this.m22 = 1.0;
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175 return this;
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176 }
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177 Transform.prototype.concat = function(traf) {
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178 // add Transform traf to this Transform
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179 for (var i = 0; i < 3; i++) {
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180 for (var j = 0; j < 3; j++) {
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181 var c = 0.0;
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182 for (var k = 0; k < 3; k++) {
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183 c += traf["m"+i+k] * this["m"+k+j];
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184 }
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185 this["m"+i+j] = c;
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186 }
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187 }
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188 return this;
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189 }
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190 Transform.prototype.transform = function(rect) {
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191 // returns transformed Rectangle or Position with this Transform applied
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192 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
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193 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
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194 if (rect.width) {
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195 var width = this.m00 * rect.width + this.m01 * rect.height;
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196 var height = this.m10 * rect.width + this.m11 * rect.height;
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197 return new Rectangle(x, y, width, height);
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198 }
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199 return new Position(x, y);
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200 }
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201 Transform.prototype.invtransform = function(pos) {
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202 // returns transformed Position pos with the inverse of this Transform applied
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203 var det = this.m00 * this.m11 - this.m01 * this.m10;
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204 var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
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205 var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
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206 return new Position(x, y);
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207 }
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208 function getRotation(angle, pos) {
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209 // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
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210 var traf = new Transform();
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211 if (angle != 0) {
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212 var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
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213 traf.m00 = Math.cos(t);
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214 traf.m01 = - Math.sin(t);
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215 traf.m10 = Math.sin(t);
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216 traf.m11 = Math.cos(t);
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217 traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
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218 traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
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219 }
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220 return traf;
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221 }
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222 function getTranslation(pos) {
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223 // returns a Transform that is a translation by [pos.x, pos,y]
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224 var traf = new Transform();
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225 traf.m02 = pos.x;
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226 traf.m12 = pos.y;
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227 return traf;
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228 }
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229 function getScale(size) {
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230 // returns a Transform that is a scale by [size.width, size.height]
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231 var traf = new Transform();
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232 traf.m00 = size.width;
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233 traf.m11 = size.height;
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234 return traf;
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235 }
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236
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237
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238 /* **********************************************
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239 * parameter routines
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240 * ******************************************** */
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241
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242 var dlParams = new Object();
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243
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244 function newParameter(name, defaultValue, detail) {
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245 // create a new parameter with a name and a default value
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246 if (defined(dlParams[name])) {
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247 alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
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248 return false;
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249 } else {
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250 dlParams[name] = new Object();
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251 dlParams[name].defaultValue = defaultValue;
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252 dlParams[name].hasValue = false;
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253 dlParams[name].value = defaultValue;
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254 dlParams[name].detail = detail;
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255 return dlParams[name];
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256 }
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257 }
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258
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259 function getParameter(name) {
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260 // returns the named parameter value or its default value
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261 if (defined(dlParams[name])) {
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262 if (dlParams[name].hasValue) {
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263 return dlParams[name].value;
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264 } else {
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265 return dlParams[name].defaultValue;
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266 }
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267 } else {
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268 return null;
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269 }
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270 }
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271
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272 function setParameter(name, value) {
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273 // sets parameter value
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274 if (defined(dlParams[name])) {
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275 dlParams[name].value = value;
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276 dlParams[name].hasValue = true;
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277 return true;
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278 }
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279 return false;
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280 }
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281
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282 function getAllParameters(detail) {
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283 // returns a string of all parameters in query format
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284 if (! detail) {
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285 detail = 10;
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286 }
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287 var params = new Array();
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288 for ( param in dlParams ) {
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289 if ((dlParams[param].detail <= detail)&&(dlParams[param].hasValue)) {
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290 var val = getParameter(param);
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291 if (val != "") {
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292 params.push(param + "=" + val);
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293 }
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294 }
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295 }
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296 return params.join("&");
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297 }
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298
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299 function parseParameters(query) {
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300 // gets parameter values from query format string
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301 var params = query.split("&");
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302 for (var i = 0; i < params.length; i++) {
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303 var keyval = params[i].split("=");
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304 if (keyval.length == 2) {
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305 setParameter(keyval[0], keyval[1]);
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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 /* **********************************************
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312 * HTML/DOM routines
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313 * ******************************************** */
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314
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315 function getElement(tagid, quiet) {
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316 // returns the element object with the id tagid
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317 var e;
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318 if (document.getElementById) {
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319 e = document.getElementById(tagid);
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320 } else if (document.all) {
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321 alert("document.all!");
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322 e = document.all[tagid];
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323 } else if (document.layers) {
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324 e = document.layers[tagid];
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325 }
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326 if (e) {
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327 return e;
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328 } else {
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329 if (! quiet) {
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330 alert("unable to find element: "+tagid);
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331 }
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332 return null;
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333 }
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334 }
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335
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336 function getElementPosition(elem) {
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337 // returns a Position with the position of the element
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338 var x = 0;
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339 var y = 0;
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340 if (defined(elem.offsetLeft)) {
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341 var e = elem;
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342 while (e) {
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343 if (defined(e.clientLeft)) {
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344 // special for IE
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345 if (browserType.isMac) {
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346 if (e.offsetParent.tagName == "BODY") {
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347 // IE for Mac extraspecial
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348 x += e.clientLeft;
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349 y += e.clientTop;
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350 break;
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351 }
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352 } else {
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353 if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
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354 x += e.clientLeft;
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355 y += e.clientTop;
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356 }
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357 }
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358 }
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359 x += e.offsetLeft;
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360 y += e.offsetTop;
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361 e = e.offsetParent;
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362 }
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363 } else if (defined(elem.x)) {
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364 x = elem.x;
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365 y = elem.y;
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366 } else if (defined(elem.pageX)) {
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367 x = elem.pageX;
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368 y = elem.pageY;
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369 } else {
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370 alert("unable to get position of "+elem+" (id:"+elem.id+")");
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371 }
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372 return new Position(getInt(x), getInt(y));
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373 }
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374
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375 function getElementSize(elem) {
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376 // returns a Rectangle with the size of the element
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377 var width = 0;
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378 var height = 0;
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379 if (defined(elem.offsetWidth)) {
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380 width = elem.offsetWidth;
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381 height = elem.offsetHeight;
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382 } else if (defined(elem.width)) {
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383 width = elem.width;
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384 height = elem.height;
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385 } else if (defined(elem.clip.width)) {
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386 width = elem.clip.width;
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387 height = elem.clip.height;
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388 } else {
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389 alert("unable to get size of "+elem+" (id:"+elem.id+")");
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390 }
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391 return new Size(getInt(width), getInt(height));
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392 }
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393
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394 function getElementRect(elem) {
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395 // returns a Rectangle with the size and position of the element
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396 var pos = getElementPosition(elem);
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397 var size = getElementSize(elem);
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398 return new Rectangle(pos.x, pos.y, size.width, size.height);
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399 }
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400
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401
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402
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403 function moveElement(elem, rect) {
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404 // moves and sizes the element
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405 if (elem.style) {
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406 if (defined(rect.x)) {
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407 elem.style.left = Math.round(rect.x) + "px";
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408 elem.style.top = Math.round(rect.y) + "px";
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409 }
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410 if (defined(rect.width)) {
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411 elem.style.width = Math.round(rect.width) + "px";
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412 elem.style.height = Math.round(rect.height) + "px";
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413 }
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414 } else if (document.layers) {
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415 if (defined(rect.x)) {
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416 elem.pageX = getInt(rect.x);
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417 elem.pageY = getInt(rect.y);
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418 }
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419 if (defined(rect.width)) {
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420 elem.clip.width = getInt(rect.width);
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421 elem.clip.height = getInt(rect.height);
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422 }
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423 } else {
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424 alert("moveelement: no style nor layer property!");
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425 return false;
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426 }
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427 return true;
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428 }
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429
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430 function showElement(elem, show) {
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431 // shows or hides the element
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432 if (elem.style) {
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433 if (show) {
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434 elem.style.visibility = "visible";
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435 } else {
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436 elem.style.visibility = "hidden";
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437 }
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438 } else if (defined(elem.visibility)) {
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439 if (show) {
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440 elem.visibility = "show";
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441 } else {
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442 elem.visibility = "hide";
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443 }
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444 } else {
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445 alert("showelement: no style nor layer property!");
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446 }
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447 return true;
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448 }
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449
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450 function evtPosition(evt) {
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451 // returns the on-screen Position of the Event
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452 var x;
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453 var y;
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454 evt = (evt) ? evt : window.event;
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455 if (!evt) {
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456 alert("no event found! "+evt);
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457 return;
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458 }
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459 if (defined(evt.pageX)) {
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460 x = parseInt(evt.pageX);
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461 y = parseInt(evt.pageY);
|
|
|
462 } else if (defined(evt.clientX)) {
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463 x = parseInt(document.body.scrollLeft+evt.clientX);
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464 y = parseInt(document.body.scrollTop+evt.clientY);
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|
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465 } else {
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466 alert("evtPosition: don't know how to deal with "+evt);
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|
|
467 }
|
|
|
468 return new Position(x, y);
|
|
|
469 }
|
|
|
470
|
|
|
471 function registerMouseDown(elem, handler) {
|
|
|
472 // register a mouse down event handler on the indicated element
|
|
|
473 if (elem.addEventListener) {
|
|
|
474 elem.addEventListener("mousedown", handler, false);
|
|
|
475 } else {
|
|
|
476 if (elem.captureEvents) {
|
|
|
477 elem.captureEvents(Event.MOUSEDOWN);
|
|
|
478 }
|
|
|
479 elem.onmousedown = handler;
|
|
|
480 }
|
|
|
481 return true;
|
|
|
482 }
|
|
|
483
|
|
|
484 function unregisterMouseDown(elem, handler) {
|
|
|
485 // unregister the mouse down event handler
|
|
|
486 if (elem.removeEventListener) {
|
|
|
487 elem.removeEventListener("mousedown", handler, false);
|
|
|
488 } else {
|
|
|
489 if (elem.releaseEvents) {
|
|
|
490 elem.releaseEvents(Event.MOUSEDOWN);
|
|
|
491 }
|
|
|
492 elem.onmousedown = null;
|
|
|
493 }
|
|
|
494 return true;
|
|
|
495 }
|
|
|
496
|
|
|
497 function registerMouseMove(elem, handler) {
|
|
|
498 // register a mouse move event handler on the indicated element
|
|
|
499 if (elem.addEventListener) {
|
|
|
500 elem.addEventListener("mousemove", handler, false);
|
|
|
501 } else {
|
|
|
502 if (elem.captureEvents) {
|
|
|
503 elem.captureEvents(Event.MOUSEMOVE);
|
|
|
504 }
|
|
|
505 elem.onmousemove = handler;
|
|
|
506 }
|
|
|
507 return true;
|
|
|
508 }
|
|
|
509
|
|
|
510 function unregisterMouseMove(elem, handler) {
|
|
|
511 // unregister the mouse move event handler
|
|
|
512 if (elem.removeEventListener) {
|
|
|
513 elem.removeEventListener("mousemove", handler, false);
|
|
|
514 } else {
|
|
|
515 if (elem.releaseEvents) {
|
|
|
516 elem.releaseEvents(Event.MOUSEMOVE);
|
|
|
517 }
|
|
|
518 elem.onmousemove = null;
|
|
|
519 }
|
|
|
520 return true;
|
|
|
521 }
|
|
|
522
|
|
|
523 function registerKeyDown(handler) {
|
|
|
524 // register a key down handler
|
|
|
525 if ( document.addEventListener ) {
|
|
|
526 this.document.addEventListener('keypress', handler, false);
|
|
|
527 } else {
|
|
|
528 if (elem.captureEvents) {
|
|
|
529 elem.captureEvents(Event.MOUSEDOWN);
|
|
|
530 }
|
|
|
531 this.document.onkeypress = handler
|
|
|
532 }
|
|
|
533 return true;
|
|
|
534 }
|
|
|
535
|
|
|
536 function getWinSize() {
|
|
|
537 // returns a Size with the current window size (mostly from www.quirksmode.org)
|
|
|
538 var wsize = new Size(100, 100);
|
|
|
539 if (defined(self.innerHeight)) {
|
|
|
540 // all except Explorer
|
|
|
541 wsize.width = self.innerWidth;
|
|
|
542 wsize.height = self.innerHeight;
|
|
|
543 } else if (document.documentElement && document.documentElement.clientHeight) {
|
|
|
544 // Explorer 6 Strict Mode
|
|
|
545 wsize.width = document.documentElement.clientWidth;
|
|
|
546 wsize.height = document.documentElement.clientHeight;
|
|
|
547 } else if (document.body) {
|
|
|
548 // other Explorers
|
|
|
549 wsize.width = document.body.clientWidth;
|
|
|
550 wsize.height = document.body.clientHeight;
|
|
|
551 }
|
|
|
552 return wsize;
|
|
|
553 }
|
|
|
554
|
|
|
555 function openWin(url, title, params) {
|
|
|
556 // open browser window
|
|
|
557 var ow = window.open(url, title, params);
|
|
|
558 ow.focus();
|
|
|
559 }
|
