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398
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1 /* Copyright (C) 2003,2004 IT-Group MPIWG, 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:
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18 Christian Luginbuehl, 01.05.2003 (first version)
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19 DW 24.03.2004 (Changed for digiLib in Zope)
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20 Robert Casties, 2.11.2004
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21
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22 */
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23
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24 function base_init() {
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25 // init function
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26 baseScriptVersion = "1.2";
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27 dlParams = new Object();
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28 browserType = getBrowserType();
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29 }
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30
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31
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32 function getInt(n) {
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33 // returns always an integer
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34 n = parseInt(n);
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35 if (isNaN(n)) return 0;
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36 return n;
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37 }
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38
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39 function defined(x) {
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40 // returns if x is defined
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41 return (typeof arguments[0] != "undefined");
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42 }
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43
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44 function cropFloat(x) {
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45 // auxiliary function to crop senseless precision
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46 return parseInt(10000*x)/10000;
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47 }
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48
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49 function getBrowserType() {
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50 // browser sniffer
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51 var bt = Object();
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52 bt.doDHTML = false;
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53 bt.versIE = 0;
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54
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55 if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
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56 var vers = navigator.appVersion.split('MSIE ');
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57 vers = vers[vers.length - 1];
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58 bt.versIE = getInt(vers);
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59 bt.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
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60 bt.isMac = navigator.platform.indexOf('Mac') >= 0;
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61 bt.isWin = navigator.platform.indexOf('Win') >= 0;
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62 bt.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! bt.isIE;
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63 bt.isIEWin = bt.versIE > 0 && bt.isWin;
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64 if (navigator.appVersion.indexOf('MSIE') < 0 || ! bt.isMac || bt.versIE >= 5) {
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65 bt.doDHTML = true;
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66 bt.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
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67 bt.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
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68 }
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69 }
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70 return bt;
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71 }
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72
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73 // fixes for javascript < 1.2
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74 if (! Array.prototype.push) {
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75 Array.prototype.push = function(val) {
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76 this[this.length] = val;
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77 return this.length;
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78 }
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79 Array.prototype.pop = function() {
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80 var val = this[this.length-1];
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81 this.length -= 1;
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82 return val;
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83 }
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84 }
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85
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86
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87 /* **********************************************
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88 * geometry classes
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89 * ******************************************** */
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90
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91 /*
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92 * Size class
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93 */
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94 function Size(w, h) {
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95 this.width = parseFloat(w);
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96 this.height = parseFloat(h);
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97 return this;
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98 }
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99 Size.prototype.toString = function() {
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100 return this.width + "x" + this.height;
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101 }
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102
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103
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104 /*
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105 * Position class
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106 */
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107 function Position(x, y) {
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108 this.x = parseFloat(x);
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109 this.y = parseFloat(y);
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110 return this;
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111 }
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112 Position.prototype.toString = function() {
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113 return this.x + "," + this.y;
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114 }
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115
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116 /*
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117 * Rectangle class
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118 */
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119 function Rectangle(x, y, w, h) {
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120 this.x = parseFloat(x);
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121 this.y = parseFloat(y);
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122 this.width = parseFloat(w);
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123 this.height = parseFloat(h);
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124 return this;
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125 }
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126 Rectangle.prototype.toString = function() {
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127 return this.width+"x"+this.height+"@"+this.x+","+this.y;
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128 }
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129 Rectangle.prototype.copy = function() {
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130 // returns a copy of this Rectangle
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131 return new Rectangle(this.x, this.y, this.width, this.height);
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132 }
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133 Rectangle.prototype.getPosition = function() {
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134 // returns the position of this Rectangle
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135 return new Position(this.x, this.y);
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136 }
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137 Rectangle.prototype.getSize = function() {
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138 // returns the size of this Rectangle
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139 return new Size(this.width, this.height);
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140 }
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141 Rectangle.prototype.getArea = function() {
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142 // returns the area of this Rectangle
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143 return (this.width * this.height);
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144 }
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145 Rectangle.prototype.containsPosition = function(pos) {
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146 // returns if the given Position lies in this Rectangle
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147 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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148 }
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149 Rectangle.prototype.intersect = function(rect) {
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150 // returns the intersection of the given Rectangle and this one
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151 var sec = rect.copy();
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152 if (sec.x < this.x) {
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153 sec.width = sec.width - (this.x - sec.x);
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154 sec.x = this.x;
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155 }
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156 if (sec.y < this.y) {
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157 sec.height = sec.height - (this.y - sec.y);
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158 sec.y = this.y;
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159 }
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160 if (sec.x + sec.width > this.x + this.width) {
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161 sec.width = (this.x + this.width) - sec.x;
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162 }
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163 if (sec.y + sec.height > this.y + this.height) {
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164 sec.height = (this.y + this.height) - sec.y;
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165 }
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166 return sec;
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167 }
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168 Rectangle.prototype.fit = function(rect) {
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169 // returns a Rectangle that fits into this one (by moving first)
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170 var sec = rect.copy();
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171 sec.x = Math.max(sec.x, this.x);
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172 sec.x = Math.max(sec.x, this.x);
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173 if (sec.x + sec.width > this.x + this.width) {
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174 sec.x = this.x + this.width - sec.width;
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175 }
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176 if (sec.y + sec.height > this.y + this.height) {
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177 sec.y = this.y + this.height - sec.height;
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178 }
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179 return sec.intersect(this);
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180 }
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181
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182 /*
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183 * Transform class
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184 *
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185 * defines a class of affine transformations
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186 */
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187 function Transform() {
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188 this.m00 = 1.0;
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189 this.m01 = 0.0;
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190 this.m02 = 0.0;
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191 this.m10 = 0.0;
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192 this.m11 = 1.0;
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193 this.m12 = 0.0;
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194 this.m20 = 0.0;
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195 this.m21 = 0.0;
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196 this.m22 = 1.0;
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197 return this;
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198 }
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199 Transform.prototype.concat = function(traf) {
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200 // add Transform traf to this Transform
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201 for (var i = 0; i < 3; i++) {
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202 for (var j = 0; j < 3; j++) {
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203 var c = 0.0;
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204 for (var k = 0; k < 3; k++) {
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205 c += traf["m"+i+k] * this["m"+k+j];
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206 }
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207 this["m"+i+j] = c;
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208 }
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209 }
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210 return this;
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211 }
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212 Transform.prototype.transform = function(rect) {
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213 // returns transformed Rectangle or Position with this Transform applied
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214 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
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215 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
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216 if (rect.width) {
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217 var width = this.m00 * rect.width + this.m01 * rect.height;
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218 var height = this.m10 * rect.width + this.m11 * rect.height;
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219 return new Rectangle(x, y, width, height);
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220 }
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221 return new Position(x, y);
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222 }
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223 Transform.prototype.invtransform = function(pos) {
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224 // returns transformed Position pos with the inverse of this Transform applied
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225 var det = this.m00 * this.m11 - this.m01 * this.m10;
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226 var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
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227 var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
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228 return new Position(x, y);
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229 }
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230 function getRotation(angle, pos) {
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231 // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
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232 var traf = new Transform();
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233 if (angle != 0) {
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234 var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
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235 traf.m00 = Math.cos(t);
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236 traf.m01 = - Math.sin(t);
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237 traf.m10 = Math.sin(t);
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238 traf.m11 = Math.cos(t);
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239 traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
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240 traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
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241 }
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242 return traf;
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243 }
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244 function getTranslation(pos) {
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245 // returns a Transform that is a translation by [pos.x, pos,y]
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246 var traf = new Transform();
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247 traf.m02 = pos.x;
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248 traf.m12 = pos.y;
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249 return traf;
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250 }
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251 function getScale(size) {
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252 // returns a Transform that is a scale by [size.width, size.height]
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253 var traf = new Transform();
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254 traf.m00 = size.width;
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255 traf.m11 = size.height;
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256 return traf;
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257 }
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258
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259
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260 /* **********************************************
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261 * parameter routines
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262 * ******************************************** */
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263
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264 function newParameter(name, defaultValue, detail) {
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265 // create a new parameter with a name and a default value
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266 if (!defined(dlParams[name])) dlParams[name] = new Object(); // no error condition
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267 //alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
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268 //return false;
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269 dlParams[name].defaultValue = defaultValue;
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270 dlParams[name].hasValue = false;
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271 dlParams[name].value = defaultValue;
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272 dlParams[name].detail = detail;
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273 return dlParams[name];
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274 }
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275
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276 function getParameter(name) {
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277 // returns the named parameter value or its default value
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278 if (defined(dlParams[name])) {
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279 if (dlParams[name].hasValue) {
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280 return dlParams[name].value;
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281 } else {
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282 return dlParams[name].defaultValue;
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283 }
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284 } else {
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285 return null;
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286 }
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287 }
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288
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289 function setParameter(name, value, relative) {
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290 // sets parameter value (relative values with +/- unless literal)
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291 if (defined(dlParams[name])) {
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292 if ((relative)&&(value.slice)) {
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293 var sign = value.slice(0,1);
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294 if (sign == '+') {
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295 dlParams[name].value = parseFloat(dlParams[name].value) + parseFloat(value.slice(1));
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296 } else if (sign == '-') {
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297 dlParams[name].value = parseFloat(dlParams[name].value) - parseFloat(value.slice(1));
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298 } else {
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299 dlParams[name].value = value;
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300 }
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301 } else {
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302 dlParams[name].value = value;
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303 }
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304 dlParams[name].hasValue = true;
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305 return true;
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306 }
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307 return false;
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308 }
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309
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310 function hasParameter(name) {
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311 // returns if the parameter's value has been set
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312 if (defined(dlParams[name])) {
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313 return dlParams[name].hasValue;
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314 }
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315 return false;
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316 }
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317
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318 function getAllParameters(detail) {
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319 // returns a string of all parameters in query format
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320 if (! detail) {
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321 detail = 255;
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322 }
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323 var params = new Array();
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324 for (param in dlParams) {
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325 if (((dlParams[param].detail & detail) > 0)&&(dlParams[param].hasValue)) {
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326 var val = getParameter(param);
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327 if (val != "") {
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328 params.push(param + "=" + val);
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329 }
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330 }
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331 }
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332 return params.join("&");
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333 }
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334
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335 getQueryString = getAllParameters;
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336
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337 function parseParameters(query) {
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338 // gets parameter values from query format string
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339 var params = query.split("&");
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340 for (var i = 0; i < params.length; i++) {
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341 var keyval = params[i].split("=");
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342 if (keyval.length == 2) {
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343 setParameter(keyval[0], keyval[1]);
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344 }
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345 }
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346 }
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347
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348
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349 /* **********************************************
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350 * HTML/DOM routines
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351 * ******************************************** */
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352
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353 function getElement(tagid, quiet) {
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354 // returns the element object with the id tagid
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355 var e;
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356 if (document.getElementById) {
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357 e = document.getElementById(tagid);
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358 } else if (document.all) {
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359 alert("document.all!");
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360 e = document.all[tagid];
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361 } else if (document.layers) {
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362 e = document.layers[tagid];
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363 }
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364 if (e) {
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365 return e;
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366 } else {
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367 if (! quiet) {
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368 alert("unable to find element: "+tagid);
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369 }
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370 return null;
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371 }
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372 }
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373
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374 function getElementPosition(elem) {
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375 // returns a Position with the position of the element
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376 var x = 0;
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377 var y = 0;
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378 if (defined(elem.offsetLeft)) {
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379 var e = elem;
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380 while (e) {
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381 if (defined(e.clientLeft)) {
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382 // special for IE
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383 if (browserType.isMac) {
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384 if (e.offsetParent.tagName == "BODY") {
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385 // IE for Mac extraspecial
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386 x += e.clientLeft;
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387 y += e.clientTop;
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388 break;
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389 }
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390 } else {
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391 if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
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392 x += e.clientLeft;
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393 y += e.clientTop;
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394 }
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395 }
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396 }
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397 x += e.offsetLeft;
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398 y += e.offsetTop;
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399 e = e.offsetParent;
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400 }
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401 } else if (defined(elem.x)) {
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402 x = elem.x;
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403 y = elem.y;
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404 } else if (defined(elem.pageX)) {
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405 x = elem.pageX;
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406 y = elem.pageY;
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407 } else {
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408 alert("unable to get position of "+elem+" (id:"+elem.id+")");
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409 }
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410 return new Position(getInt(x), getInt(y));
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411 }
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412
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413 function getElementSize(elem) {
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414 // returns a Rectangle with the size of the element
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415 var width = 0;
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416 var height = 0;
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417 if (defined(elem.offsetWidth)) {
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418 width = elem.offsetWidth;
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419 height = elem.offsetHeight;
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420 } else if (defined(elem.width)) {
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421 width = elem.width;
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422 height = elem.height;
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423 } else if (defined(elem.clip.width)) {
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424 width = elem.clip.width;
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425 height = elem.clip.height;
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426 } else {
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427 alert("unable to get size of "+elem+" (id:"+elem.id+")");
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428 }
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429 return new Size(getInt(width), getInt(height));
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430 }
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431
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432 function getElementRect(elem) {
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433 // returns a Rectangle with the size and position of the element
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434 var pos = getElementPosition(elem);
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435 var size = getElementSize(elem);
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436 return new Rectangle(pos.x, pos.y, size.width, size.height);
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437 }
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438
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439
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440
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441 function moveElement(elem, rect) {
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442 // moves and sizes the element
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443 if (elem.style) {
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444 if (defined(rect.x)) {
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445 elem.style.left = Math.round(rect.x) + "px";
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446 elem.style.top = Math.round(rect.y) + "px";
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447 }
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448 if (defined(rect.width)) {
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449 elem.style.width = Math.round(rect.width) + "px";
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450 elem.style.height = Math.round(rect.height) + "px";
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451 }
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452 } else if (document.layers) {
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453 if (defined(rect.x)) {
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454 elem.pageX = getInt(rect.x);
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455 elem.pageY = getInt(rect.y);
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456 }
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457 if (defined(rect.width)) {
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458 elem.clip.width = getInt(rect.width);
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459 elem.clip.height = getInt(rect.height);
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460 }
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461 } else {
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462 alert("moveelement: no style nor layer property!");
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463 return false;
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464 }
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465 return true;
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466 }
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467
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468 function showElement(elem, show) {
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469 // shows or hides the element
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470 if (elem.style) {
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471 if (show) {
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472 elem.style.visibility = "visible";
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473 } else {
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474 elem.style.visibility = "hidden";
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475 }
|
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476 } else if (defined(elem.visibility)) {
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477 if (show) {
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478 elem.visibility = "show";
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479 } else {
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480 elem.visibility = "hide";
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481 }
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|
482 } else {
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483 alert("showelement: no style nor layer property!");
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|
|
484 }
|
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|
485 return true;
|
|
|
486 }
|
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487
|
|
|
488 function evtPosition(evt) {
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|
|
489 // returns the on-screen Position of the Event
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|
490 var x;
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|
|
491 var y;
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|
492 evt = (evt) ? evt : window.event;
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|
|
493 if (!evt) {
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|
494 alert("no event found! "+evt);
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|
|
495 return;
|
|
|
496 }
|
|
|
497 if (defined(evt.pageX)) {
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|
|
498 x = parseInt(evt.pageX);
|
|
|
499 y = parseInt(evt.pageY);
|
|
|
500 } else if (defined(evt.clientX)) {
|
|
|
501 x = parseInt(document.body.scrollLeft+evt.clientX);
|
|
|
502 y = parseInt(document.body.scrollTop+evt.clientY);
|
|
|
503 } else {
|
|
|
504 alert("evtPosition: don't know how to deal with "+evt);
|
|
|
505 }
|
|
|
506 return new Position(x, y);
|
|
|
507 }
|
|
|
508
|
|
|
509 function registerEvent(type, elem, handler) {
|
|
|
510 // register the given event handler on the indicated element
|
|
|
511 if (elem.addEventListener) {
|
|
|
512 elem.addEventListener(type, handler, false);
|
|
|
513 } else {
|
|
|
514 if (type == "mousedown") {
|
|
|
515 if (elem.captureEvents) {
|
|
|
516 elem.captureEvents(Event.MOUSEDOWN);
|
|
|
517 }
|
|
|
518 elem.onmousedown = handler;
|
|
|
519 } else if (type == "mouseup") {
|
|
|
520 if (elem.captureEvents) {
|
|
|
521 elem.captureEvents(Event.MOUSEUP);
|
|
|
522 }
|
|
|
523 elem.onmouseup = handler;
|
|
|
524 } else if (type == "mousemove") {
|
|
|
525 if (elem.captureEvents) {
|
|
|
526 elem.captureEvents(Event.MOUSEMOVE);
|
|
|
527 }
|
|
|
528 elem.onmousemove = handler;
|
|
|
529 } else if (type == "keypress") {
|
|
|
530 if (elem.captureEvents) {
|
|
|
531 elem.captureEvents(Event.KEYPRESS);
|
|
|
532 }
|
|
|
533 elem.onkeypress = handler;
|
|
|
534 } else {
|
|
|
535 alert("registerEvent: unknown event type "+type);
|
|
|
536 return false;
|
|
|
537 }
|
|
|
538 }
|
|
|
539 return true;
|
|
|
540 }
|
|
|
541
|
|
|
542 function unregisterEvent(type, elem, handler) {
|
|
|
543 // unregister the given event handler from the indicated element
|
|
|
544 if (elem.removeEventListener) {
|
|
|
545 elem.removeEventListener(type, handler, false);
|
|
|
546 } else {
|
|
|
547 if (type == "mousedown") {
|
|
|
548 if (elem.releaseEvents) {
|
|
|
549 elem.releaseEvents(Event.MOUSEDOWN);
|
|
|
550 }
|
|
|
551 elem.onmousedown = null;
|
|
|
552 } else if (type == "mouseup") {
|
|
|
553 if (elem.releaseEvents) {
|
|
|
554 elem.releaseEvents(Event.MOUSEUP);
|
|
|
555 }
|
|
|
556 elem.onmouseup = null;
|
|
|
557 } else if (type == "mousemove") {
|
|
|
558 if (elem.releaseEvents) {
|
|
|
559 elem.releaseEvents(Event.MOUSEMOVE);
|
|
|
560 }
|
|
|
561 elem.onmousemove = null;
|
|
|
562 } else if (type == "keypress") {
|
|
|
563 if (elem.releaseEvents) {
|
|
|
564 elem.releaseEvents(Event.KEYPRESS);
|
|
|
565 }
|
|
|
566 elem.onkeypress = null;
|
|
|
567 } else {
|
|
|
568 alert("unregisterEvent: unknown event type "+type);
|
|
|
569 return false;
|
|
|
570 }
|
|
|
571 }
|
|
|
572 return true;
|
|
|
573 }
|
|
|
574
|
|
|
575
|
|
|
576 // old registerXXYY API for compatibility
|
|
|
577 function registerMouseDown(elem, handler) {
|
|
|
578 return registerEvent("mousedown", elem, handler);
|
|
|
579 }
|
|
|
580 function unregisterMouseDown(elem, handler) {
|
|
|
581 return unregisterEvent("mousedown", elem, handler);
|
|
|
582 }
|
|
|
583 function registerMouseMove(elem, handler) {
|
|
|
584 return registerEvent("mousemove", elem, handler);
|
|
|
585 }
|
|
|
586 function unregisterMouseMove(elem, handler) {
|
|
|
587 return unregisterEvent("mousemove", elem, handler);
|
|
|
588 }
|
|
|
589 function registerKeyDown(handler) {
|
|
|
590 return registerEvent("keypress", elem, handler);
|
|
|
591 }
|
|
|
592
|
|
|
593
|
|
|
594 function getWinSize() {
|
|
|
595 // returns a Size with the current window size (mostly from www.quirksmode.org)
|
|
|
596 var wsize = new Size(100, 100);
|
|
|
597 if (defined(self.innerHeight)) {
|
|
|
598 // all except Explorer
|
|
|
599 if ((self.innerWidth == 0)||(self.innerHeight == 0)) {
|
|
|
600 // Safari 1.2 bug
|
|
|
601 if (parent) {
|
|
|
602 parent.innerHeight;
|
|
|
603 parent.innerWidth;
|
|
|
604 }
|
|
|
605 }
|
|
|
606 wsize.width = self.innerWidth;
|
|
|
607 wsize.height = self.innerHeight;
|
|
|
608 } else if (document.documentElement && document.documentElement.clientHeight) {
|
|
|
609 // Explorer 6 Strict Mode
|
|
|
610 wsize.width = document.documentElement.clientWidth;
|
|
|
611 wsize.height = document.documentElement.clientHeight;
|
|
|
612 } else if (document.body) {
|
|
|
613 // other Explorers
|
|
|
614 wsize.width = document.body.clientWidth;
|
|
|
615 wsize.height = document.body.clientHeight;
|
|
|
616 }
|
|
|
617 return wsize;
|
|
|
618 }
|
|
|
619
|
|
|
620 function openWin(url, name, params) {
|
|
|
621 // open browser window
|
|
|
622 var ow = window.open(url, name, params);
|
|
|
623 ow.focus();
|
|
|
624 }
|
