--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/digitallibrary/baselib.js	Tue Jul 20 09:57:24 2004 +0200
@@ -0,0 +1,559 @@
+/* Copyright (C) 2003,2004 WTWG, Uni Bern and others
+ 
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+ 
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+ 
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ 
+Authors: ROC 03.06.2004
+  first version by Christian Luginbuehl, 01.05.2003
+  Changed for digiLib in Zope by DW 24.03.2004
+*/
+
+function getInt (n) {
+    // returns always an integer
+    n = parseInt (n);
+    if (isNaN (n))
+	return 0;
+    return n;
+}
+
+function defined(x) {
+    // returns if x is defined
+    return (typeof arguments[0] != "undefined");
+}
+
+// auxiliary function to crop senseless precision
+function cropFloat(x) {
+    return parseInt(10000*x)/10000;
+}
+
+// browser sniffer
+var browserType = Object();
+browserType.doDHTML = false;
+browserType.versIE = 0;
+
+if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
+    var vers = navigator.appVersion.split('MSIE ');
+    vers = vers[vers.length - 1];
+    browserType.versIE = getInt(vers);
+    browserType.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
+    browserType.isMac = navigator.platform.indexOf('Mac') >= 0;
+    browserType.isWin = navigator.platform.indexOf('Win') >= 0;
+    browserType.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! browserType.isIE;
+    browserType.isIEWin = browserType.versIE > 0 && browserType.isWin;
+    if (navigator.appVersion.indexOf('MSIE') < 0 || ! browserType.isMac || browserType.versIE >= 5) {
+	browserType.doDHTML = true;
+	browserType.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
+	browserType.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
+    }
+}
+
+// fixes for javascript < 1.2
+if (! Array.prototype.push) {
+    Array.prototype.push = function(val) {
+	this[this.length] = val;
+	return this.length;
+    }
+    Array.prototype.pop = function() {
+	var val = this[this.length-1];
+	this.length -= 1;
+	return val;
+    }
+}
+
+
+/* **********************************************
+ *     geometry classes
+ * ******************************************** */
+
+/*
+ * Size class
+ */
+function Size(w, h) {
+    this.width = parseFloat(w);
+    this.height = parseFloat(h);
+    return this;
+}
+
+/*
+ * Position class
+ */
+function Position(x, y) {
+    this.x = parseFloat(x);
+    this.y = parseFloat(y);
+    return this;
+}
+
+/*
+ * Rectangle class
+ */
+function Rectangle(x, y, w, h) {
+    this.x = parseFloat(x);
+    this.y = parseFloat(y);
+    this.width = parseFloat(w);
+    this.height = parseFloat(h);
+    return this;
+}
+Rectangle.prototype.copy = function() {
+    // returns a copy of this Rectangle
+    return new Rectangle(this.x, this.y, this.width, this.height);
+}
+Rectangle.prototype.getPosition = function() {
+    // returns the position of this Rectangle
+    return new Position(this.x, this.y);
+}
+Rectangle.prototype.getSize = function() {
+    // returns the size of this Rectangle
+    return new Size(this.width, this.height);
+}
+Rectangle.prototype.getArea = function() {
+    // returns the area of this Rectangle
+    return (this.width * this.height);
+}
+Rectangle.prototype.containsPosition = function(pos) {
+    // returns if the given Position lies in this Rectangle
+    return ((pos.x >= this.x)&&(pos.y >= this.y)&&(pos.x <= this.x+this.width)&&(pos.y <= this.y+this.width));
+}
+Rectangle.prototype.intersect = function(rect) {
+    // returns the intersection of the given Rectangle and this one
+    var sec = rect.copy();
+    if (sec.x < this.x) {
+	sec.width = sec.width - (this.x - sec.x);
+	sec.x = this.x;
+    }
+    if (sec.y < this.y) {
+	sec.height = sec.height - (this.y - sec.y);
+	sec.y = this.y;
+    }
+    if (sec.x + sec.width > this.x + this.width) {
+	sec.width = (this.x + this.width) - sec.x;
+    }
+    if (sec.y + sec.height > this.y + this.height) {
+	sec.height = (this.y + this.height) - sec.y;
+    }
+    return sec;
+}
+Rectangle.prototype.fit = function(rect) {
+    // returns a Rectangle that fits into this one (by moving first)
+    var sec = rect.copy();
+    sec.x = Math.max(sec.x, this.x);
+    sec.x = Math.max(sec.x, this.x);
+    if (sec.x + sec.width > this.x + this.width) {
+	sec.x = this.x + this.width - sec.width;
+    }
+    if (sec.y + sec.height > this.y + this.height) {
+	sec.y = this.y + this.height - sec.height;
+    }
+    return sec.intersect(this);
+}
+
+/*
+ * Transform class
+ *
+ * defines a class of affine transformations
+ */
+function Transform() {
+    this.m00 = 1.0;
+    this.m01 = 0.0;
+    this.m02 = 0.0;
+    this.m10 = 0.0;
+    this.m11 = 1.0;
+    this.m12 = 0.0;
+    this.m20 = 0.0;
+    this.m21 = 0.0;
+    this.m22 = 1.0;
+    return this;
+}
+Transform.prototype.concat = function(traf) {
+    // add Transform traf to this Transform
+    for (var i = 0; i < 3; i++) {
+	for (var j = 0; j < 3; j++) {
+	    var c = 0.0;
+	    for (var k = 0; k < 3; k++) {
+		c += traf["m"+i+k] * this["m"+k+j];
+	    }
+	    this["m"+i+j] = c;
+	}
+    }
+    return this;
+}
+Transform.prototype.transform = function(rect) {
+    // returns transformed Rectangle or Position with this Transform applied
+    var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
+    var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
+    if (rect.width) {
+	var width = this.m00 * rect.width + this.m01 * rect.height;
+	var height = this.m10 * rect.width + this.m11 * rect.height;
+	return new Rectangle(x, y, width, height);
+    }
+    return new Position(x, y);
+}
+Transform.prototype.invtransform = function(pos) {
+    // returns transformed Position pos with the inverse of this Transform applied
+    var det = this.m00 * this.m11 - this.m01 * this.m10;
+    var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
+    var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
+    return new Position(x, y);
+}
+function getRotation(angle, pos) {
+    // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
+    var traf = new Transform();
+    if (angle != 0) {
+	var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
+	traf.m00 = Math.cos(t);
+	traf.m01 = - Math.sin(t);
+	traf.m10 = Math.sin(t);
+	traf.m11 = Math.cos(t);
+	traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
+	traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
+    }
+    return traf;
+}
+function getTranslation(pos) {
+    // returns a Transform that is a translation by [pos.x, pos,y]
+    var traf = new Transform();
+    traf.m02 = pos.x;
+    traf.m12 = pos.y;
+    return traf;
+}
+function getScale(size) {
+    // returns a Transform that is a scale by [size.width, size.height]
+    var traf = new Transform();
+    traf.m00 = size.width;
+    traf.m11 = size.height;
+    return traf;
+}
+
+
+/* **********************************************
+ *     parameter routines
+ * ******************************************** */
+
+var dlParams = new Object();
+
+function newParameter(name, defaultValue, detail) {
+    // create a new parameter with a name and a default value
+    if (defined(dlParams[name])) {
+	alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
+	return false;
+    } else {
+	dlParams[name] = new Object();
+	dlParams[name].defaultValue = defaultValue;
+	dlParams[name].hasValue = false;
+	dlParams[name].value = defaultValue;
+	dlParams[name].detail = detail;
+	return dlParams[name];
+    }
+}
+
+function getParameter(name) {
+    // returns the named parameter value or its default value
+    if (defined(dlParams[name])) {
+	if (dlParams[name].hasValue) {
+	    return dlParams[name].value;
+	} else {
+	    return dlParams[name].defaultValue;
+	}
+    } else {
+	return null;
+    }
+}
+
+function setParameter(name, value) {
+    // sets parameter value
+    if (defined(dlParams[name])) {
+	dlParams[name].value = value;
+	dlParams[name].hasValue = true;
+	return true;
+    }
+    return false;
+}
+
+function getAllParameters(detail) {
+    // returns a string of all parameters in query format
+    if (! detail) {
+	detail = 10;
+    }
+    var params = new Array();
+    for ( param in dlParams ) {
+	if ((dlParams[param].detail <= detail)&&(dlParams[param].hasValue)) {
+	    var val = getParameter(param);
+	    if (val != "") {
+		params.push(param + "=" + val);
+	    }
+	}
+    }
+    return params.join("&");
+}
+
+function parseParameters(query) {
+    // gets parameter values from query format string
+    var params = query.split("&");
+    for (var i = 0; i < params.length; i++) {
+	var keyval = params[i].split("=");
+	if (keyval.length == 2) {
+	    setParameter(keyval[0], keyval[1]);
+	}
+    }
+}
+
+
+/* **********************************************
+ *     HTML/DOM routines
+ * ******************************************** */
+
+function getElement(tagid, quiet) {
+    // returns the element object with the id tagid
+    var e;
+    if (document.getElementById) {
+	e = document.getElementById(tagid);
+    } else if (document.all) {
+	alert("document.all!");
+	e = document.all[tagid];
+    } else if (document.layers) {
+        e = document.layers[tagid];
+    } 
+    if (e) {
+	return e;
+    } else {
+	if (! quiet) {
+	    alert("unable to find element: "+tagid);
+	}
+	return null;
+    }
+}
+
+function getElementPosition(elem) {
+    // returns a Position with the position of the element
+    var x = 0;
+    var y = 0;
+    if (defined(elem.offsetLeft)) {
+	var e = elem;
+	while (e) {
+	    if (defined(e.clientLeft)) {
+		// special for IE
+		if (browserType.isMac) {
+		    if (e.offsetParent.tagName == "BODY") {
+			// IE for Mac extraspecial
+			x += e.clientLeft;
+			y += e.clientTop;
+			break;
+		    }
+		} else {
+		    if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
+			x += e.clientLeft;
+			y += e.clientTop;
+		    }
+		}
+	    }
+	    x += e.offsetLeft;
+	    y += e.offsetTop;
+	    e = e.offsetParent;
+	}
+    } else if (defined(elem.x)) {
+	x = elem.x;
+	y = elem.y;
+    } else if (defined(elem.pageX)) {
+	x = elem.pageX;
+	y = elem.pageY;
+    } else {
+	alert("unable to get position of "+elem+" (id:"+elem.id+")");
+    }
+    return new Position(getInt(x), getInt(y));
+}
+
+function getElementSize(elem) {
+    // returns a Rectangle with the size of the element
+    var width = 0;
+    var height = 0;
+    if (defined(elem.offsetWidth)) {
+	width = elem.offsetWidth;
+	height = elem.offsetHeight;
+    } else if (defined(elem.width)) {
+	width = elem.width;
+	height = elem.height;
+    } else if (defined(elem.clip.width)) {
+	width = elem.clip.width;
+	height = elem.clip.height;
+    } else {
+	alert("unable to get size of "+elem+" (id:"+elem.id+")");
+    }
+    return new Size(getInt(width), getInt(height));
+}
+
+function getElementRect(elem) {
+    // returns a Rectangle with the size and position of the element
+    var pos = getElementPosition(elem);
+    var size = getElementSize(elem);
+    return new Rectangle(pos.x, pos.y, size.width, size.height);
+}
+
+
+
+function moveElement(elem, rect) {
+    // moves and sizes the element
+    if (elem.style) {
+	if (defined(rect.x)) {
+	    elem.style.left = Math.round(rect.x) + "px";
+	    elem.style.top = Math.round(rect.y) + "px";
+	}
+	if (defined(rect.width)) {
+	    elem.style.width = Math.round(rect.width) + "px";
+	    elem.style.height = Math.round(rect.height) + "px";
+	}
+    } else if (document.layers) {
+	if (defined(rect.x)) {
+	    elem.pageX = getInt(rect.x);
+	    elem.pageY = getInt(rect.y);
+	}
+	if (defined(rect.width)) {
+	    elem.clip.width = getInt(rect.width);
+	    elem.clip.height = getInt(rect.height);
+	}
+    } else {
+    	alert("moveelement: no style nor layer property!");
+	return false;
+    }
+    return true;
+}
+
+function showElement(elem, show) {
+    // shows or hides the element
+    if (elem.style) {
+	if (show) {
+	    elem.style.visibility = "visible";
+	} else {
+	    elem.style.visibility = "hidden";
+	}
+    } else if (defined(elem.visibility)) {
+	if (show) {
+	    elem.visibility = "show";
+	} else {
+	    elem.visibility = "hide";
+	}
+    } else {
+	alert("showelement: no style nor layer property!");
+    }
+    return true;
+}
+
+function evtPosition(evt) {
+    // returns the on-screen Position of the Event 
+    var x;
+    var y;
+    evt = (evt) ? evt : window.event;
+    if (!evt) {
+	alert("no event found! "+evt);
+	return;
+    }
+    if (defined(evt.pageX)) {
+	x = parseInt(evt.pageX);
+	y = parseInt(evt.pageY);
+    } else if (defined(evt.clientX)) {
+	x = parseInt(document.body.scrollLeft+evt.clientX);
+	y = parseInt(document.body.scrollTop+evt.clientY);
+    } else {
+	alert("evtPosition: don't know how to deal with "+evt);
+    }
+    return new Position(x, y);
+}
+
+function registerMouseDown(elem, handler) {
+    // register a mouse down event handler on the indicated element
+    if (elem.addEventListener) {
+	elem.addEventListener("mousedown", handler, false);
+    } else {
+	if (elem.captureEvents) {
+	    elem.captureEvents(Event.MOUSEDOWN);
+	}
+	elem.onmousedown = handler;
+    }
+    return true;
+}
+
+function unregisterMouseDown(elem, handler) {
+    // unregister the mouse down event handler
+    if (elem.removeEventListener) {
+	elem.removeEventListener("mousedown", handler, false);
+    } else {
+	if (elem.releaseEvents) {
+	    elem.releaseEvents(Event.MOUSEDOWN);
+	}
+	elem.onmousedown = null;
+    }
+    return true;
+}
+
+function registerMouseMove(elem, handler) {
+    // register a mouse move event handler on the indicated element
+    if (elem.addEventListener) {
+	elem.addEventListener("mousemove", handler, false);
+    } else {
+	if (elem.captureEvents) {
+	    elem.captureEvents(Event.MOUSEMOVE);
+	}
+	elem.onmousemove = handler;
+    }
+    return true;
+}
+
+function unregisterMouseMove(elem, handler) {
+    // unregister the mouse move event handler
+    if (elem.removeEventListener) {
+	elem.removeEventListener("mousemove", handler, false);
+    } else {
+	if (elem.releaseEvents) {
+	    elem.releaseEvents(Event.MOUSEMOVE);
+	}
+	elem.onmousemove = null;
+    }
+    return true;
+}
+
+function registerKeyDown(handler) {
+    // register a key down handler
+    if ( document.addEventListener ) {
+	this.document.addEventListener('keypress', handler, false);
+    } else {
+	if (elem.captureEvents) {
+	    elem.captureEvents(Event.MOUSEDOWN);
+	}
+	this.document.onkeypress = handler
+    }
+    return true;
+}
+
+function getWinSize() {
+    // returns a Size with the current window size (mostly from www.quirksmode.org)
+    var wsize = new Size(100, 100);
+    if (defined(self.innerHeight))  {
+	// all except Explorer
+	wsize.width = self.innerWidth;
+	wsize.height = self.innerHeight;
+    } else if (document.documentElement && document.documentElement.clientHeight) {
+	// Explorer 6 Strict Mode
+	wsize.width = document.documentElement.clientWidth;
+	wsize.height = document.documentElement.clientHeight;
+    } else if (document.body) {
+	// other Explorers
+	wsize.width = document.body.clientWidth;
+	wsize.height = document.body.clientHeight;
+    }
+    return wsize;
+}
+
+function openWin(url, title, params) {
+    // open browser window
+    var ow = window.open(url, title, params);
+    ow.focus();
+}