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