Annotation of ECHO_content/js/baselib.js, revision 1.2
1.1 casties 1: /* Copyright (C) 2003,2004 IT-Group MPIWG, WTWG Uni Bern and others
2:
3: This program is free software; you can redistribute it and/or
4: modify it under the terms of the GNU General Public License
5: as published by the Free Software Foundation; either version 2
6: of the License, or (at your option) any later version.
7:
8: This program is distributed in the hope that it will be useful,
9: but WITHOUT ANY WARRANTY; without even the implied warranty of
10: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11: GNU General Public License for more details.
12:
13: You should have received a copy of the GNU General Public License
14: along with this program; if not, write to the Free Software
15: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
16:
17: Authors:
18: Christian Luginbuehl, 01.05.2003 (first version)
19: DW 24.03.2004 (Changed for digiLib in Zope)
1.2 ! casties 20: Robert Casties, 11.9.2007
1.1 casties 21:
22: */
23:
24: function base_init() {
1.2 ! casties 25: // init function
! 26: baseScriptVersion = "1.2.2";
! 27: dlParams = new Object();
! 28: browserType = getBrowserType();
1.1 casties 29: }
30:
31:
32: function getInt(n) {
33: // returns always an integer
34: n = parseInt(n);
35: if (isNaN(n)) return 0;
36: return n;
37: }
38:
39: function defined(x) {
40: // returns if x is defined
41: return (typeof arguments[0] != "undefined");
42: }
43:
44: function cropFloat(x) {
45: // auxiliary function to crop senseless precision
46: return parseInt(10000*x)/10000;
47: }
48:
49: function getBrowserType() {
50: // browser sniffer
51: var bt = Object();
52: bt.doDHTML = false;
53: bt.versIE = 0;
54:
55: if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
1.2 ! casties 56: var vers = navigator.appVersion.split('MSIE ');
! 57: vers = vers[vers.length - 1];
! 58: bt.versIE = getInt(vers);
! 59: bt.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
! 60: bt.isMac = navigator.platform.indexOf('Mac') >= 0;
! 61: bt.isWin = navigator.platform.indexOf('Win') >= 0;
! 62: bt.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! bt.isIE;
! 63: bt.isIEWin = bt.versIE > 0 && bt.isWin;
! 64: if (navigator.appVersion.indexOf('MSIE') < 0 || ! bt.isMac || bt.versIE >= 5) {
! 65: bt.doDHTML = true;
! 66: bt.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
! 67: bt.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
! 68: }
1.1 casties 69: }
70: return bt;
71: }
72:
73: // fixes for javascript < 1.2
74: if (! Array.prototype.push) {
75: Array.prototype.push = function(val) {
1.2 ! casties 76: this[this.length] = val;
! 77: return this.length;
1.1 casties 78: }
79: Array.prototype.pop = function() {
1.2 ! casties 80: var val = this[this.length-1];
! 81: this.length -= 1;
! 82: return val;
1.1 casties 83: }
84: }
85:
86:
87: /* **********************************************
88: * geometry classes
89: * ******************************************** */
90:
91: /*
92: * Size class
93: */
94: function Size(w, h) {
95: this.width = parseFloat(w);
96: this.height = parseFloat(h);
97: return this;
98: }
99: Size.prototype.toString = function() {
100: return this.width + "x" + this.height;
101: }
102:
103:
104: /*
105: * Position class
106: */
107: function Position(x, y) {
108: this.x = parseFloat(x);
109: this.y = parseFloat(y);
110: return this;
111: }
112: Position.prototype.toString = function() {
113: return this.x + "," + this.y;
114: }
115:
116: /*
117: * Rectangle class
118: */
119: function Rectangle(x, y, w, h) {
120: this.x = parseFloat(x);
121: this.y = parseFloat(y);
122: this.width = parseFloat(w);
123: this.height = parseFloat(h);
124: return this;
125: }
126: Rectangle.prototype.toString = function() {
127: return this.width+"x"+this.height+"@"+this.x+","+this.y;
128: }
129: Rectangle.prototype.copy = function() {
130: // returns a copy of this Rectangle
131: return new Rectangle(this.x, this.y, this.width, this.height);
132: }
133: Rectangle.prototype.getPosition = function() {
134: // returns the position of this Rectangle
135: return new Position(this.x, this.y);
136: }
137: Rectangle.prototype.getSize = function() {
138: // returns the size of this Rectangle
139: return new Size(this.width, this.height);
140: }
141: Rectangle.prototype.getArea = function() {
142: // returns the area of this Rectangle
143: return (this.width * this.height);
144: }
145: Rectangle.prototype.containsPosition = function(pos) {
146: // returns if the given Position lies in this Rectangle
147: return ((pos.x >= this.x)&&(pos.y >= this.y)&&(pos.x <= this.x+this.width)&&(pos.y <= this.y+this.width));
148: }
149: Rectangle.prototype.intersect = function(rect) {
150: // returns the intersection of the given Rectangle and this one
151: var sec = rect.copy();
152: if (sec.x < this.x) {
1.2 ! casties 153: sec.width = sec.width - (this.x - sec.x);
! 154: sec.x = this.x;
1.1 casties 155: }
156: if (sec.y < this.y) {
1.2 ! casties 157: sec.height = sec.height - (this.y - sec.y);
! 158: sec.y = this.y;
1.1 casties 159: }
160: if (sec.x + sec.width > this.x + this.width) {
1.2 ! casties 161: sec.width = (this.x + this.width) - sec.x;
1.1 casties 162: }
163: if (sec.y + sec.height > this.y + this.height) {
1.2 ! casties 164: sec.height = (this.y + this.height) - sec.y;
1.1 casties 165: }
166: return sec;
167: }
168: Rectangle.prototype.fit = function(rect) {
169: // returns a Rectangle that fits into this one (by moving first)
170: var sec = rect.copy();
171: sec.x = Math.max(sec.x, this.x);
172: sec.x = Math.max(sec.x, this.x);
173: if (sec.x + sec.width > this.x + this.width) {
1.2 ! casties 174: sec.x = this.x + this.width - sec.width;
1.1 casties 175: }
176: if (sec.y + sec.height > this.y + this.height) {
1.2 ! casties 177: sec.y = this.y + this.height - sec.height;
1.1 casties 178: }
179: return sec.intersect(this);
180: }
181:
182: /*
183: * Transform class
184: *
185: * defines a class of affine transformations
186: */
187: function Transform() {
188: this.m00 = 1.0;
189: this.m01 = 0.0;
190: this.m02 = 0.0;
191: this.m10 = 0.0;
192: this.m11 = 1.0;
193: this.m12 = 0.0;
194: this.m20 = 0.0;
195: this.m21 = 0.0;
196: this.m22 = 1.0;
197: return this;
198: }
199: Transform.prototype.concat = function(traf) {
200: // add Transform traf to this Transform
201: for (var i = 0; i < 3; i++) {
1.2 ! casties 202: for (var j = 0; j < 3; j++) {
! 203: var c = 0.0;
! 204: for (var k = 0; k < 3; k++) {
! 205: c += traf["m"+i+k] * this["m"+k+j];
! 206: }
! 207: this["m"+i+j] = c;
! 208: }
1.1 casties 209: }
210: return this;
211: }
212: Transform.prototype.transform = function(rect) {
213: // returns transformed Rectangle or Position with this Transform applied
214: var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
215: var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
216: if (rect.width) {
1.2 ! casties 217: var width = this.m00 * rect.width + this.m01 * rect.height;
! 218: var height = this.m10 * rect.width + this.m11 * rect.height;
! 219: return new Rectangle(x, y, width, height);
1.1 casties 220: }
221: return new Position(x, y);
222: }
223: Transform.prototype.invtransform = function(pos) {
224: // returns transformed Position pos with the inverse of this Transform applied
225: var det = this.m00 * this.m11 - this.m01 * this.m10;
226: var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
227: var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
228: return new Position(x, y);
229: }
230: function getRotation(angle, pos) {
231: // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
232: var traf = new Transform();
233: if (angle != 0) {
1.2 ! casties 234: var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
! 235: traf.m00 = Math.cos(t);
! 236: traf.m01 = - Math.sin(t);
! 237: traf.m10 = Math.sin(t);
! 238: traf.m11 = Math.cos(t);
! 239: traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
! 240: traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
1.1 casties 241: }
242: return traf;
243: }
244: function getTranslation(pos) {
245: // returns a Transform that is a translation by [pos.x, pos,y]
246: var traf = new Transform();
247: traf.m02 = pos.x;
248: traf.m12 = pos.y;
249: return traf;
250: }
251: function getScale(size) {
252: // returns a Transform that is a scale by [size.width, size.height]
253: var traf = new Transform();
254: traf.m00 = size.width;
255: traf.m11 = size.height;
256: return traf;
257: }
258:
259:
260: /* **********************************************
261: * parameter routines
262: * ******************************************** */
263:
264: function newParameter(name, defaultValue, detail) {
265: // create a new parameter with a name and a default value
266: if (defined(dlParams[name])) {
1.2 ! casties 267: alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
! 268: return false;
1.1 casties 269: } else {
1.2 ! casties 270: dlParams[name] = new Object();
! 271: dlParams[name].defaultValue = defaultValue;
! 272: dlParams[name].hasValue = false;
! 273: dlParams[name].value = defaultValue;
! 274: dlParams[name].detail = detail;
! 275: return dlParams[name];
1.1 casties 276: }
277: }
278:
279: function getParameter(name) {
280: // returns the named parameter value or its default value
281: if (defined(dlParams[name])) {
1.2 ! casties 282: if (dlParams[name].hasValue) {
! 283: return dlParams[name].value;
! 284: } else {
! 285: return dlParams[name].defaultValue;
! 286: }
1.1 casties 287: } else {
1.2 ! casties 288: return null;
1.1 casties 289: }
290: }
291:
1.2 ! casties 292: function setParameter(name, value, relative) {
! 293: // sets parameter value (relative values with +/- unless literal)
1.1 casties 294: if (defined(dlParams[name])) {
1.2 ! casties 295: if ((relative)&&(value.slice)) {
! 296: var sign = value.slice(0,1);
! 297: if (sign == '+') {
! 298: dlParams[name].value = parseFloat(dlParams[name].value) + parseFloat(value.slice(1));
! 299: } else if (sign == '-') {
! 300: dlParams[name].value = parseFloat(dlParams[name].value) - parseFloat(value.slice(1));
! 301: } else {
! 302: dlParams[name].value = value;
! 303: }
! 304: } else {
! 305: dlParams[name].value = value;
! 306: }
! 307: dlParams[name].hasValue = true;
! 308: return true;
1.1 casties 309: }
310: return false;
311: }
312:
313: function hasParameter(name) {
314: // returns if the parameter's value has been set
315: if (defined(dlParams[name])) {
1.2 ! casties 316: return dlParams[name].hasValue;
1.1 casties 317: }
318: return false;
319: }
320:
321: function getAllParameters(detail) {
322: // returns a string of all parameters in query format
323: if (! detail) {
1.2 ! casties 324: detail = 255;
1.1 casties 325: }
326: var params = new Array();
1.2 ! casties 327: for (param in dlParams) {
! 328: if (((dlParams[param].detail & detail) > 0)&&(dlParams[param].hasValue)) {
! 329: var val = getParameter(param);
! 330: if (val != "") {
! 331: params.push(param + "=" + val);
! 332: }
! 333: }
1.1 casties 334: }
335: return params.join("&");
336: }
337:
338: function parseParameters(query) {
339: // gets parameter values from query format string
340: var params = query.split("&");
341: for (var i = 0; i < params.length; i++) {
1.2 ! casties 342: var keyval = params[i].split("=");
! 343: if (keyval.length == 2) {
! 344: setParameter(keyval[0], keyval[1]);
! 345: }
1.1 casties 346: }
347: }
348:
349:
350: /* **********************************************
351: * HTML/DOM routines
352: * ******************************************** */
353:
354: function getElement(tagid, quiet) {
355: // returns the element object with the id tagid
356: var e;
357: if (document.getElementById) {
1.2 ! casties 358: e = document.getElementById(tagid);
1.1 casties 359: } else if (document.all) {
1.2 ! casties 360: alert("document.all!");
! 361: e = document.all[tagid];
1.1 casties 362: } else if (document.layers) {
363: e = document.layers[tagid];
364: }
365: if (e) {
1.2 ! casties 366: return e;
1.1 casties 367: } else {
1.2 ! casties 368: if (! quiet) {
! 369: alert("unable to find element: "+tagid);
! 370: }
! 371: return null;
1.1 casties 372: }
373: }
374:
375: function getElementPosition(elem) {
376: // returns a Position with the position of the element
377: var x = 0;
378: var y = 0;
1.2 ! casties 379: if (elem.offsetParent) {
! 380: // use .offsetLeft for most browsers
! 381: var e = elem;
! 382: while (e) {
! 383: if (browserType.isIE) {
! 384: if (browserType.isMac) {
! 385: // IE for Mac extraspecial
! 386: if (e.offsetParent.tagName == "BODY") {
! 387: x += e.clientLeft;
! 388: y += e.clientTop;
! 389: break;
! 390: }
! 391: } else {
! 392: // special for IE
! 393: if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
! 394: x += e.clientLeft;
! 395: y += e.clientTop;
! 396: }
! 397: }
! 398: }
! 399: x += e.offsetLeft;
! 400: y += e.offsetTop;
! 401: e = e.offsetParent;
! 402: }
! 403: } else if (defined(elem.x)) {
! 404: // use .x for other (which?)
! 405: x = elem.x;
! 406: y = elem.y;
1.1 casties 407: } else if (defined(elem.pageX)) {
1.2 ! casties 408: // use pageX for N4
! 409: x = elem.pageX;
! 410: y = elem.pageY;
1.1 casties 411: } else {
1.2 ! casties 412: alert("unable to get position of "+elem+" (id:"+elem.id+")");
1.1 casties 413: }
414: return new Position(getInt(x), getInt(y));
415: }
416:
417: function getElementSize(elem) {
418: // returns a Rectangle with the size of the element
419: var width = 0;
420: var height = 0;
421: if (defined(elem.offsetWidth)) {
1.2 ! casties 422: width = elem.offsetWidth;
! 423: height = elem.offsetHeight;
1.1 casties 424: } else if (defined(elem.width)) {
1.2 ! casties 425: width = elem.width;
! 426: height = elem.height;
1.1 casties 427: } else if (defined(elem.clip.width)) {
1.2 ! casties 428: width = elem.clip.width;
! 429: height = elem.clip.height;
1.1 casties 430: } else {
1.2 ! casties 431: alert("unable to get size of "+elem+" (id:"+elem.id+")");
1.1 casties 432: }
433: return new Size(getInt(width), getInt(height));
434: }
435:
436: function getElementRect(elem) {
437: // returns a Rectangle with the size and position of the element
438: var pos = getElementPosition(elem);
439: var size = getElementSize(elem);
440: return new Rectangle(pos.x, pos.y, size.width, size.height);
441: }
442:
443: function moveElement(elem, rect) {
444: // moves and sizes the element
445: if (elem.style) {
1.2 ! casties 446: if (defined(rect.x)) {
! 447: elem.style.left = Math.round(rect.x) + "px";
! 448: elem.style.top = Math.round(rect.y) + "px";
! 449: }
! 450: if (defined(rect.width)) {
! 451: elem.style.width = Math.round(rect.width) + "px";
! 452: elem.style.height = Math.round(rect.height) + "px";
! 453: }
1.1 casties 454: } else if (document.layers) {
1.2 ! casties 455: if (defined(rect.x)) {
! 456: elem.pageX = getInt(rect.x);
! 457: elem.pageY = getInt(rect.y);
! 458: }
! 459: if (defined(rect.width)) {
! 460: elem.clip.width = getInt(rect.width);
! 461: elem.clip.height = getInt(rect.height);
! 462: }
1.1 casties 463: } else {
1.2 ! casties 464: alert("moveelement: no style nor layer property!");
! 465: return false;
1.1 casties 466: }
467: return true;
468: }
469:
470: function showElement(elem, show) {
471: // shows or hides the element
472: if (elem.style) {
1.2 ! casties 473: if (show) {
! 474: elem.style.visibility = "visible";
! 475: } else {
! 476: elem.style.visibility = "hidden";
! 477: }
1.1 casties 478: } else if (defined(elem.visibility)) {
1.2 ! casties 479: if (show) {
! 480: elem.visibility = "show";
! 481: } else {
! 482: elem.visibility = "hide";
! 483: }
1.1 casties 484: } else {
1.2 ! casties 485: alert("showelement: no style nor layer property!");
1.1 casties 486: }
487: return true;
488: }
489:
1.2 ! casties 490: function isElementVisible(elem) {
! 491: // returns of the is shown or hidden
! 492: if (elem.style) {
! 493: return (elem.style.visibility == "visible");
! 494: } else if (defined(elem.visibility)) {
! 495: return (elem.visibility == "show");
! 496: } else {
! 497: alert("iselementvisible: no style nor layer property!");
! 498: }
! 499: }
! 500:
1.1 casties 501: function evtPosition(evt) {
502: // returns the on-screen Position of the Event
503: var x;
504: var y;
505: evt = (evt) ? evt : window.event;
506: if (!evt) {
1.2 ! casties 507: alert("no event found! "+evt);
! 508: return;
1.1 casties 509: }
510: if (defined(evt.pageX)) {
1.2 ! casties 511: x = parseInt(evt.pageX);
! 512: y = parseInt(evt.pageY);
1.1 casties 513: } else if (defined(evt.clientX)) {
1.2 ! casties 514: x = parseInt(document.body.scrollLeft+evt.clientX);
! 515: y = parseInt(document.body.scrollTop+evt.clientY);
1.1 casties 516: } else {
1.2 ! casties 517: alert("evtPosition: don't know how to deal with "+evt);
1.1 casties 518: }
519: return new Position(x, y);
520: }
521:
522: function registerEvent(type, elem, handler) {
523: // register the given event handler on the indicated element
524: if (elem.addEventListener) {
1.2 ! casties 525: elem.addEventListener(type, handler, false);
1.1 casties 526: } else {
1.2 ! casties 527: if (type == "mousedown") {
! 528: if (elem.captureEvents) {
! 529: elem.captureEvents(Event.MOUSEDOWN);
! 530: }
! 531: elem.onmousedown = handler;
! 532: } else if (type == "mouseup") {
! 533: if (elem.captureEvents) {
! 534: elem.captureEvents(Event.MOUSEUP);
! 535: }
! 536: elem.onmouseup = handler;
! 537: } else if (type == "mousemove") {
! 538: if (elem.captureEvents) {
! 539: elem.captureEvents(Event.MOUSEMOVE);
! 540: }
! 541: elem.onmousemove = handler;
! 542: } else if (type == "keypress") {
! 543: if (elem.captureEvents) {
! 544: elem.captureEvents(Event.KEYPRESS);
! 545: }
! 546: elem.onkeypress = handler;
! 547: } else {
! 548: alert("registerEvent: unknown event type "+type);
! 549: return false;
! 550: }
1.1 casties 551: }
552: return true;
553: }
554:
555: function unregisterEvent(type, elem, handler) {
556: // unregister the given event handler from the indicated element
557: if (elem.removeEventListener) {
1.2 ! casties 558: elem.removeEventListener(type, handler, false);
1.1 casties 559: } else {
1.2 ! casties 560: if (type == "mousedown") {
! 561: if (elem.releaseEvents) {
! 562: elem.releaseEvents(Event.MOUSEDOWN);
! 563: }
! 564: elem.onmousedown = null;
! 565: } else if (type == "mouseup") {
! 566: if (elem.releaseEvents) {
! 567: elem.releaseEvents(Event.MOUSEUP);
! 568: }
! 569: elem.onmouseup = null;
! 570: } else if (type == "mousemove") {
! 571: if (elem.releaseEvents) {
! 572: elem.releaseEvents(Event.MOUSEMOVE);
! 573: }
! 574: elem.onmousemove = null;
! 575: } else if (type == "keypress") {
! 576: if (elem.releaseEvents) {
! 577: elem.releaseEvents(Event.KEYPRESS);
! 578: }
! 579: elem.onkeypress = null;
! 580: } else {
! 581: alert("unregisterEvent: unknown event type "+type);
! 582: return false;
! 583: }
1.1 casties 584: }
585: return true;
586: }
587:
588:
589: // old registerXXYY API for compatibility
590: function registerMouseDown(elem, handler) {
591: return registerEvent("mousedown", elem, handler);
592: }
593: function unregisterMouseDown(elem, handler) {
594: return unregisterEvent("mousedown", elem, handler);
595: }
596: function registerMouseMove(elem, handler) {
597: return registerEvent("mousemove", elem, handler);
598: }
599: function unregisterMouseMove(elem, handler) {
600: return unregisterEvent("mousemove", elem, handler);
601: }
602: function registerKeyDown(handler) {
603: return registerEvent("keypress", elem, handler);
604: }
605:
606:
607: function getWinSize() {
608: // returns a Size with the current window size (mostly from www.quirksmode.org)
609: var wsize = new Size(100, 100);
610: if (defined(self.innerHeight)) {
1.2 ! casties 611: // all except Explorer
! 612: if ((self.innerWidth == 0)||(self.innerHeight == 0)) {
! 613: // Safari 1.2 bug
! 614: if (parent) {
! 615: parent.innerHeight;
! 616: parent.innerWidth;
! 617: }
! 618: }
! 619: wsize.width = self.innerWidth;
! 620: wsize.height = self.innerHeight;
1.1 casties 621: } else if (document.documentElement && document.documentElement.clientHeight) {
1.2 ! casties 622: // Explorer 6 Strict Mode
! 623: wsize.width = document.documentElement.clientWidth;
! 624: wsize.height = document.documentElement.clientHeight;
1.1 casties 625: } else if (document.body) {
1.2 ! casties 626: // other Explorers
! 627: wsize.width = document.body.clientWidth;
! 628: wsize.height = document.body.clientHeight;
1.1 casties 629: }
630: return wsize;
631: }
632:
633: function openWin(url, name, params) {
634: // open browser window
635: var ow = window.open(url, name, params);
636: ow.focus();
637: }
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