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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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407
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21 Martin Raspe, 12.12.2005 (changes for Digilib NG)
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398
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22
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23 */
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24
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407
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25 // was: function base_init() {
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26 baseLibVersion = "2.0";
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27 browserType = getBrowserType();
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398
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28
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29
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30 function getInt(n) {
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31 // returns always an integer
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32 n = parseInt(n);
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33 if (isNaN(n)) return 0;
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34 return n;
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35 }
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36
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37 function defined(x) {
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38 // returns if x is defined
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39 return (typeof arguments[0] != "undefined");
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40 }
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41
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42 function cropFloat(x) {
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43 // auxiliary function to crop senseless precision
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407
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44 return parseInt(10000 * x) / 10000;
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398
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45 }
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46
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47 function getBrowserType() {
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48 // browser sniffer
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49 var bt = Object();
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50 bt.doDHTML = false;
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51 bt.versIE = 0;
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52
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53 if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
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54 var vers = navigator.appVersion.split('MSIE ');
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55 vers = vers[vers.length - 1];
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56 bt.versIE = getInt(vers);
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57 bt.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
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58 bt.isMac = navigator.platform.indexOf('Mac') >= 0;
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59 bt.isWin = navigator.platform.indexOf('Win') >= 0;
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60 bt.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! bt.isIE;
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61 bt.isIEWin = bt.versIE > 0 && bt.isWin;
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62 if (navigator.appVersion.indexOf('MSIE') < 0 || ! bt.isMac || bt.versIE >= 5) {
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63 bt.doDHTML = true;
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64 bt.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
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65 bt.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
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66 }
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67 }
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68 return bt;
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69 }
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70
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71 // fixes for javascript < 1.2
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72 if (! Array.prototype.push) {
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73 Array.prototype.push = function(val) {
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74 this[this.length] = val;
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75 return this.length;
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76 }
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77 Array.prototype.pop = function() {
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78 var val = this[this.length-1];
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79 this.length -= 1;
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80 return val;
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81 }
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82 }
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83
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84
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85 /* **********************************************
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86 * geometry classes
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87 * ******************************************** */
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88
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89 /*
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90 * Size class
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91 */
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92 function Size(w, h) {
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93 this.width = parseFloat(w);
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94 this.height = parseFloat(h);
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95 return this;
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96 }
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97 Size.prototype.toString = function() {
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98 return this.width + "x" + this.height;
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99 }
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426
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100 Size.prototype.equals = function(other) {
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101 return (this.width == other.width
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102 && this.height == other.height)
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103 }
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398
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104
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105 /*
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106 * Position class
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107 */
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108 function Position(x, y) {
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109 this.x = parseFloat(x);
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110 this.y = parseFloat(y);
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111 return this;
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112 }
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113 Position.prototype.toString = function() {
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114 return this.x + "," + this.y;
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115 }
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426
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116 Position.prototype.equals = function(other) {
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117 return (this.x == other.x
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118 && this.y == other.y)
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119 }
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398
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120 /*
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121 * Rectangle class
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122 */
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123 function Rectangle(x, y, w, h) {
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124 this.x = parseFloat(x);
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125 this.y = parseFloat(y);
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126 this.width = parseFloat(w);
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127 this.height = parseFloat(h);
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128 return this;
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129 }
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130 Rectangle.prototype.toString = function() {
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131 return this.width+"x"+this.height+"@"+this.x+","+this.y;
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132 }
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133 Rectangle.prototype.copy = function() {
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134 // returns a copy of this Rectangle
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135 return new Rectangle(this.x, this.y, this.width, this.height);
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136 }
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137 Rectangle.prototype.getPosition = function() {
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138 // returns the position of this Rectangle
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139 return new Position(this.x, this.y);
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140 }
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141 Rectangle.prototype.getSize = function() {
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142 // returns the size of this Rectangle
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143 return new Size(this.width, this.height);
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144 }
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426
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145 Rectangle.prototype.equals = function(other) {
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146 // equal props
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147 return (this.getPosition().equals(other.getPosition())
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148 && this.getSize().equals(other.getSize())
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149 );
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150 }
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398
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151 Rectangle.prototype.getArea = function() {
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152 // returns the area of this Rectangle
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153 return (this.width * this.height);
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154 }
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155 Rectangle.prototype.containsPosition = function(pos) {
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412
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156 // returns if Position "pos" lies inside of this rectangle
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157 return ((pos.x >= this.x)
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158 && (pos.y >= this.y)
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159 && (pos.x <= this.x + this.width)
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160 && (pos.y <= this.y + this.width)
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161 );
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162 }
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163 Rectangle.prototype.containsRect = function(rect) {
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164 // returns if rectangle "rect" is contained in this rectangle
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165 return (this.containsPosition(rect)
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166 && this.containsPosition(new Position(
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167 rect.x + rect.width,
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168 rect.y + rect.height
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169 )));
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170 }
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171 Rectangle.prototype.stayInside = function(rect) {
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172 // changes this rectangle's x/y values so it stays inside of rectangle rect
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426
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173 // but not its proportions
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412
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174 if (this.x < rect.x) this.x = rect.x;
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175 if (this.y < rect.y) this.y = rect.y;
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176 if (this.x + this.width > rect.x + rect.width)
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177 this.x = rect.x + rect.width - this.width;
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178 if (this.y + this.height > rect.y + rect.height)
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179 this.y = rect.y + rect.height - this.height;
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180 return this;
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398
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181 }
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182 Rectangle.prototype.intersect = function(rect) {
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183 // returns the intersection of the given Rectangle and this one
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412
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184 // FIX ME: not really, it should return null if there is no overlap
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398
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185 var sec = rect.copy();
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186 if (sec.x < this.x) {
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187 sec.width = sec.width - (this.x - sec.x);
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188 sec.x = this.x;
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189 }
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190 if (sec.y < this.y) {
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191 sec.height = sec.height - (this.y - sec.y);
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192 sec.y = this.y;
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193 }
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194 if (sec.x + sec.width > this.x + this.width) {
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195 sec.width = (this.x + this.width) - sec.x;
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196 }
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197 if (sec.y + sec.height > this.y + this.height) {
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198 sec.height = (this.y + this.height) - sec.y;
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199 }
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200 return sec;
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201 }
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202 Rectangle.prototype.fit = function(rect) {
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203 // returns a Rectangle that fits into this one (by moving first)
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204 var sec = rect.copy();
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205 sec.x = Math.max(sec.x, this.x);
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426
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206 sec.y = Math.max(sec.y, this.x);
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398
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207 if (sec.x + sec.width > this.x + this.width) {
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208 sec.x = this.x + this.width - sec.width;
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209 }
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210 if (sec.y + sec.height > this.y + this.height) {
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211 sec.y = this.y + this.height - sec.height;
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212 }
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213 return sec.intersect(this);
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214 }
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215
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216 /*
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217 * Transform class
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218 *
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219 * defines a class of affine transformations
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220 */
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221 function Transform() {
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222 this.m00 = 1.0;
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223 this.m01 = 0.0;
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224 this.m02 = 0.0;
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225 this.m10 = 0.0;
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226 this.m11 = 1.0;
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227 this.m12 = 0.0;
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228 this.m20 = 0.0;
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229 this.m21 = 0.0;
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230 this.m22 = 1.0;
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231 return this;
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232 }
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233 Transform.prototype.concat = function(traf) {
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234 // add Transform traf to this Transform
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235 for (var i = 0; i < 3; i++) {
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236 for (var j = 0; j < 3; j++) {
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237 var c = 0.0;
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238 for (var k = 0; k < 3; k++) {
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239 c += traf["m"+i+k] * this["m"+k+j];
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240 }
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241 this["m"+i+j] = c;
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242 }
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243 }
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244 return this;
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245 }
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246 Transform.prototype.transform = function(rect) {
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247 // returns transformed Rectangle or Position with this Transform applied
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248 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
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249 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
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250 if (rect.width) {
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251 var width = this.m00 * rect.width + this.m01 * rect.height;
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252 var height = this.m10 * rect.width + this.m11 * rect.height;
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253 return new Rectangle(x, y, width, height);
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254 }
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255 return new Position(x, y);
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256 }
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257 Transform.prototype.invtransform = function(pos) {
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258 // returns transformed Position pos with the inverse of this Transform applied
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259 var det = this.m00 * this.m11 - this.m01 * this.m10;
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260 var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
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261 var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
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262 return new Position(x, y);
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263 }
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264 function getRotation(angle, pos) {
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265 // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
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266 var traf = new Transform();
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267 if (angle != 0) {
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268 var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
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269 traf.m00 = Math.cos(t);
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270 traf.m01 = - Math.sin(t);
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271 traf.m10 = Math.sin(t);
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272 traf.m11 = Math.cos(t);
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273 traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
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274 traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
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275 }
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276 return traf;
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277 }
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278 function getTranslation(pos) {
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279 // returns a Transform that is a translation by [pos.x, pos,y]
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280 var traf = new Transform();
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281 traf.m02 = pos.x;
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282 traf.m12 = pos.y;
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283 return traf;
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284 }
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285 function getScale(size) {
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286 // returns a Transform that is a scale by [size.width, size.height]
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287 var traf = new Transform();
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288 traf.m00 = size.width;
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289 traf.m11 = size.height;
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290 return traf;
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291 }
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292
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293
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294 /* **********************************************
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295 * parameter routines
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296 * ******************************************** */
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407
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297 dlParams = new Object();
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398
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298
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299 function newParameter(name, defaultValue, detail) {
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300 // create a new parameter with a name and a default value
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301 if (!defined(dlParams[name])) dlParams[name] = new Object(); // no error condition
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302 //alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
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303 //return false;
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304 dlParams[name].defaultValue = defaultValue;
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305 dlParams[name].hasValue = false;
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306 dlParams[name].value = defaultValue;
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307 dlParams[name].detail = detail;
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308 return dlParams[name];
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309 }
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310
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412
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311 function resetParameter(name) {
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312 // resets the given parameter to its default value
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313 if (!defined(dlParams[name])) {
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314 alert("Could not reset non-existing parameter '" + name + "'");
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315 return false;
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316 }
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317 dlParams[name].hasValue = false;
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318 dlParams[name].value = defaultValue;
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319 return dlParams[name];
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320 }
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321
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322 function deleteParameter(name) {
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323 // create a new parameter with a name and a default value
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324 if (!defined(dlParams[name])) return false;
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325 delete dlParams[name];
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326 return true;
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327 }
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328
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398
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329 function getParameter(name) {
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330 // returns the named parameter value or its default value
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407
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331 if (!defined(dlParams[name])) return null;
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332 if (dlParams[name].hasValue)
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412
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333 return dlParams[name].value;
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407
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334 else
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398
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335 return dlParams[name].defaultValue;
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336 }
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337
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338 function setParameter(name, value, relative) {
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339 // sets parameter value (relative values with +/- unless literal)
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412
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340 if (!defined(dlParams[name])) return null;
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341 var p = dlParams[name];
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342 if (relative && value.slice) {
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343 var sign = value.slice(0, 1);
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344 if (sign == '+') {
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345 p.value = parseFloat(p.value) + parseFloat(value.slice(1));
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346 } else if (sign == '-') {
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347 p.value = parseFloat(p.value) - parseFloat(value.slice(1));
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348 } else {
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349 p.value = value;
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350 }
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351 } else p.value = value;
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352 p.hasValue = true;
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353 return p.value;
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354 }
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398
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355
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356 function hasParameter(name) {
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412
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357 // returns if the parameter's value has been set
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358 if (!defined(dlParams[name])) return null;
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359 return dlParams[name].hasValue;
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360 }
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398
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361
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362 function getAllParameters(detail) {
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363 // returns a string of all parameters in query format
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364 if (! detail) {
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365 detail = 255;
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366 }
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367 var params = new Array();
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368 for (param in dlParams) {
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369 if (((dlParams[param].detail & detail) > 0)&&(dlParams[param].hasValue)) {
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370 var val = getParameter(param);
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371 if (val != "") {
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372 params.push(param + "=" + val);
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373 }
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374 }
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375 }
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376 return params.join("&");
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377 }
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378
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379 function parseParameters(query) {
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380 // gets parameter values from query format string
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381 var params = query.split("&");
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382 for (var i = 0; i < params.length; i++) {
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383 var keyval = params[i].split("=");
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384 if (keyval.length == 2) {
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385 setParameter(keyval[0], keyval[1]);
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386 }
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387 }
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388 }
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389
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407
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390 getQueryString = getAllParameters;
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398
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391
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392 /* **********************************************
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393 * HTML/DOM routines
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394 * ******************************************** */
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395
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396 function getElement(tagid, quiet) {
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397 // returns the element object with the id tagid
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398 var e;
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399 if (document.getElementById) {
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400 e = document.getElementById(tagid);
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401 } else if (document.all) {
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402 alert("document.all!");
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403 e = document.all[tagid];
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|
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404 } else if (document.layers) {
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405 e = document.layers[tagid];
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406 }
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407 if (e) {
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408 return e;
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|
|
409 } else {
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|
410 if (! quiet) {
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411 alert("unable to find element: "+tagid);
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|
412 }
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413 return null;
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414 }
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415 }
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416
|
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|
417 function getElementPosition(elem) {
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418 // returns a Position with the position of the element
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419 var x = 0;
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|
420 var y = 0;
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421 if (defined(elem.offsetLeft)) {
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422 var e = elem;
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423 while (e) {
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424 if (defined(e.clientLeft)) {
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425 // special for IE
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|
426 if (browserType.isMac) {
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|
427 if (e.offsetParent.tagName == "BODY") {
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|
428 // IE for Mac extraspecial
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|
429 x += e.clientLeft;
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430 y += e.clientTop;
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431 break;
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432 }
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|
433 } else {
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434 if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
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435 x += e.clientLeft;
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|
436 y += e.clientTop;
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437 }
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438 }
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439 }
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440 x += e.offsetLeft;
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441 y += e.offsetTop;
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442 e = e.offsetParent;
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443 }
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444 } else if (defined(elem.x)) {
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445 x = elem.x;
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446 y = elem.y;
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447 } else if (defined(elem.pageX)) {
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448 x = elem.pageX;
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449 y = elem.pageY;
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450 } else {
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451 alert("unable to get position of "+elem+" (id:"+elem.id+")");
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452 }
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|
453 return new Position(getInt(x), getInt(y));
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454 }
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455
|
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|
456 function getElementSize(elem) {
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|
457 // returns a Rectangle with the size of the element
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|
458 var width = 0;
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|
459 var height = 0;
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|
460 if (defined(elem.offsetWidth)) {
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|
461 width = elem.offsetWidth;
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|
462 height = elem.offsetHeight;
|
|
|
463 } else if (defined(elem.width)) {
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|
464 width = elem.width;
|
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|
465 height = elem.height;
|
|
|
466 } else if (defined(elem.clip.width)) {
|
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|
467 width = elem.clip.width;
|
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|
468 height = elem.clip.height;
|
|
|
469 } else {
|
|
|
470 alert("unable to get size of "+elem+" (id:"+elem.id+")");
|
|
|
471 }
|
|
|
472 return new Size(getInt(width), getInt(height));
|
|
|
473 }
|
|
|
474
|
|
|
475 function getElementRect(elem) {
|
|
|
476 // returns a Rectangle with the size and position of the element
|
|
412
|
477 // FIX ME: what about borders?
|
|
398
|
478 var pos = getElementPosition(elem);
|
|
|
479 var size = getElementSize(elem);
|
|
|
480 return new Rectangle(pos.x, pos.y, size.width, size.height);
|
|
|
481 }
|
|
|
482
|
|
|
483
|
|
|
484
|
|
|
485 function moveElement(elem, rect) {
|
|
|
486 // moves and sizes the element
|
|
|
487 if (elem.style) {
|
|
|
488 if (defined(rect.x)) {
|
|
|
489 elem.style.left = Math.round(rect.x) + "px";
|
|
|
490 elem.style.top = Math.round(rect.y) + "px";
|
|
|
491 }
|
|
|
492 if (defined(rect.width)) {
|
|
|
493 elem.style.width = Math.round(rect.width) + "px";
|
|
|
494 elem.style.height = Math.round(rect.height) + "px";
|
|
|
495 }
|
|
|
496 } else if (document.layers) {
|
|
|
497 if (defined(rect.x)) {
|
|
|
498 elem.pageX = getInt(rect.x);
|
|
|
499 elem.pageY = getInt(rect.y);
|
|
|
500 }
|
|
|
501 if (defined(rect.width)) {
|
|
|
502 elem.clip.width = getInt(rect.width);
|
|
|
503 elem.clip.height = getInt(rect.height);
|
|
|
504 }
|
|
|
505 } else {
|
|
|
506 alert("moveelement: no style nor layer property!");
|
|
|
507 return false;
|
|
|
508 }
|
|
|
509 return true;
|
|
|
510 }
|
|
|
511
|
|
|
512 function showElement(elem, show) {
|
|
|
513 // shows or hides the element
|
|
|
514 if (elem.style) {
|
|
|
515 if (show) {
|
|
|
516 elem.style.visibility = "visible";
|
|
|
517 } else {
|
|
|
518 elem.style.visibility = "hidden";
|
|
|
519 }
|
|
|
520 } else if (defined(elem.visibility)) {
|
|
|
521 if (show) {
|
|
|
522 elem.visibility = "show";
|
|
|
523 } else {
|
|
|
524 elem.visibility = "hide";
|
|
|
525 }
|
|
|
526 } else {
|
|
|
527 alert("showelement: no style nor layer property!");
|
|
|
528 }
|
|
|
529 return true;
|
|
|
530 }
|
|
|
531
|
|
|
532 function evtPosition(evt) {
|
|
|
533 // returns the on-screen Position of the Event
|
|
|
534 var x;
|
|
|
535 var y;
|
|
|
536 evt = (evt) ? evt : window.event;
|
|
|
537 if (!evt) {
|
|
|
538 alert("no event found! "+evt);
|
|
|
539 return;
|
|
|
540 }
|
|
|
541 if (defined(evt.pageX)) {
|
|
|
542 x = parseInt(evt.pageX);
|
|
|
543 y = parseInt(evt.pageY);
|
|
|
544 } else if (defined(evt.clientX)) {
|
|
|
545 x = parseInt(document.body.scrollLeft+evt.clientX);
|
|
|
546 y = parseInt(document.body.scrollTop+evt.clientY);
|
|
|
547 } else {
|
|
|
548 alert("evtPosition: don't know how to deal with "+evt);
|
|
|
549 }
|
|
|
550 return new Position(x, y);
|
|
|
551 }
|
|
|
552
|
|
|
553 function registerEvent(type, elem, handler) {
|
|
412
|
554 // register the given event handler on the indicated element
|
|
|
555 if (elem.addEventListener) {
|
|
|
556 elem.addEventListener(type, handler, false); // bubble
|
|
|
557 }
|
|
|
558 else if (elem.attachEvent) {
|
|
|
559 elem.attachEvent("on" + type, handler);
|
|
|
560 }
|
|
|
561 else if (elem.captureEvents) {
|
|
|
562 if (Event) {
|
|
|
563 t = type.toUpperCase();
|
|
|
564 elem.captureEvents(Event[t]);
|
|
|
565 elem[ "on" + t ] = handler;
|
|
|
566 }
|
|
|
567 }
|
|
|
568 else {
|
|
|
569 alert("Could not register event of type " + type);
|
|
|
570 return false;
|
|
|
571 }
|
|
|
572 return true;
|
|
|
573 }
|
|
|
574
|
|
407
|
575 function unregisterEvent(type, elem, handler) {
|
|
412
|
576 // unregister the given event handler from the indicated element
|
|
|
577 if (elem.removeEventListener) {
|
|
|
578 elem.removeEventListener(type, handler, false);
|
|
|
579 }
|
|
|
580 else if (elem.detachEvent) {
|
|
|
581 elem.detachEvent('on' + type, handler);
|
|
|
582 }
|
|
|
583 else if (elem.releaseEvents) {
|
|
|
584 if (Event) {
|
|
|
585 t = type.toUpperCase();
|
|
|
586 elem.releaseEvents(Event[t]);
|
|
|
587 elem[ "on" + t ] = null;
|
|
|
588 }
|
|
|
589 }
|
|
|
590 else {
|
|
|
591 alert("Could not register event of type " + type);
|
|
|
592 return false;
|
|
|
593 }
|
|
|
594 return true;
|
|
398
|
595 }
|
|
|
596
|
|
407
|
597 function registerEventById(type, id, handler) {
|
|
412
|
598 registerEvent(type, document.getElementById(id), handler);
|
|
|
599 }
|
|
407
|
600
|
|
|
601 function unregisterEventById(type, id, handler) {
|
|
412
|
602 unregisterEvent(type, document.getElementById(id), handler);
|
|
|
603 }
|
|
407
|
604
|
|
|
605 function stopEvent(e) {
|
|
412
|
606 if (!e) var e = window.event;
|
|
|
607 e.cancelBubble = true;
|
|
|
608 if (e.stopPropagation) e.stopPropagation();
|
|
|
609 return false;
|
|
398
|
610 }
|
|
|
611
|
|
407
|
612 function getEventSrc(e) {
|
|
412
|
613 if (e.target) return e.target;
|
|
|
614 if (e.srcElement) return e.srcElement;
|
|
407
|
615 }
|
|
398
|
616
|
|
|
617 // old registerXXYY API for compatibility
|
|
|
618 function registerMouseDown(elem, handler) {
|
|
|
619 return registerEvent("mousedown", elem, handler);
|
|
|
620 }
|
|
|
621 function unregisterMouseDown(elem, handler) {
|
|
|
622 return unregisterEvent("mousedown", elem, handler);
|
|
|
623 }
|
|
|
624 function registerMouseMove(elem, handler) {
|
|
|
625 return registerEvent("mousemove", elem, handler);
|
|
|
626 }
|
|
|
627 function unregisterMouseMove(elem, handler) {
|
|
|
628 return unregisterEvent("mousemove", elem, handler);
|
|
|
629 }
|
|
|
630 function registerKeyDown(handler) {
|
|
|
631 return registerEvent("keypress", elem, handler);
|
|
|
632 }
|
|
|
633
|
|
|
634
|
|
|
635 function getWinSize() {
|
|
|
636 // returns a Size with the current window size (mostly from www.quirksmode.org)
|
|
|
637 var wsize = new Size(100, 100);
|
|
|
638 if (defined(self.innerHeight)) {
|
|
|
639 // all except Explorer
|
|
|
640 if ((self.innerWidth == 0)||(self.innerHeight == 0)) {
|
|
|
641 // Safari 1.2 bug
|
|
|
642 if (parent) {
|
|
|
643 parent.innerHeight;
|
|
|
644 parent.innerWidth;
|
|
|
645 }
|
|
|
646 }
|
|
|
647 wsize.width = self.innerWidth;
|
|
|
648 wsize.height = self.innerHeight;
|
|
|
649 } else if (document.documentElement && document.documentElement.clientHeight) {
|
|
|
650 // Explorer 6 Strict Mode
|
|
|
651 wsize.width = document.documentElement.clientWidth;
|
|
|
652 wsize.height = document.documentElement.clientHeight;
|
|
|
653 } else if (document.body) {
|
|
|
654 // other Explorers
|
|
|
655 wsize.width = document.body.clientWidth;
|
|
|
656 wsize.height = document.body.clientHeight;
|
|
|
657 }
|
|
|
658 return wsize;
|
|
|
659 }
|
|
|
660
|
|
|
661 function openWin(url, name, params) {
|
|
|
662 // open browser window
|
|
|
663 var ow = window.open(url, name, params);
|
|
|
664 ow.focus();
|
|
|
665 }
|
