Annotation of zogiLib/js/baselib.js, revision 1.2
1.1 casties 1: /* Copyright (C) 2003,2004 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: ROC 03.06.2004
18: first version by Christian Luginbuehl, 01.05.2003
19: Changed for digiLib in Zope by DW 24.03.2004
20: */
21:
22: function getInt(n) {
23: // returns always an integer
24: n = parseInt(n);
25: if (isNaN(n)) return 0;
26: return n;
27: }
28:
29: function defined(x) {
30: // returns if x is defined
31: return (typeof arguments[0] != "undefined");
32: }
33:
34: // auxiliary function to crop senseless precision
35: function cropFloat(x) {
36: return parseInt(10000*x)/10000;
37: }
38:
39: // browser sniffer
40: var browserType = Object();
41: browserType.doDHTML = false;
42: browserType.versIE = 0;
43:
44: if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
45: var vers = navigator.appVersion.split('MSIE ');
46: vers = vers[vers.length - 1];
47: browserType.versIE = getInt(vers);
48: browserType.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
49: browserType.isMac = navigator.platform.indexOf('Mac') >= 0;
50: browserType.isWin = navigator.platform.indexOf('Win') >= 0;
51: browserType.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! browserType.isIE;
52: browserType.isIEWin = browserType.versIE > 0 && browserType.isWin;
53: if (navigator.appVersion.indexOf('MSIE') < 0 || ! browserType.isMac || browserType.versIE >= 5) {
54: browserType.doDHTML = true;
55: browserType.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
56: browserType.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
57: }
58: }
59:
60: // fixes for javascript < 1.2
61: if (! Array.prototype.push) {
62: Array.prototype.push = function(val) {
63: this[this.length] = val;
64: return this.length;
65: }
66: Array.prototype.pop = function() {
67: var val = this[this.length-1];
68: this.length -= 1;
69: return val;
70: }
71: }
72:
73:
74: /* **********************************************
75: * geometry classes
76: * ******************************************** */
77:
78: /*
79: * Size class
80: */
81: function Size(w, h) {
82: this.width = parseFloat(w);
83: this.height = parseFloat(h);
84: return this;
85: }
86:
87: /*
88: * Position class
89: */
90: function Position(x, y) {
91: this.x = parseFloat(x);
92: this.y = parseFloat(y);
93: return this;
94: }
95:
96: /*
97: * Rectangle class
98: */
99: function Rectangle(x, y, w, h) {
100: this.x = parseFloat(x);
101: this.y = parseFloat(y);
102: this.width = parseFloat(w);
103: this.height = parseFloat(h);
104: return this;
105: }
106: Rectangle.prototype.copy = function() {
107: // returns a copy of this Rectangle
108: return new Rectangle(this.x, this.y, this.width, this.height);
109: }
110: Rectangle.prototype.getPosition = function() {
111: // returns the position of this Rectangle
112: return new Position(this.x, this.y);
113: }
114: Rectangle.prototype.getSize = function() {
115: // returns the size of this Rectangle
116: return new Size(this.width, this.height);
117: }
118: Rectangle.prototype.getArea = function() {
119: // returns the area of this Rectangle
120: return (this.width * this.height);
121: }
122: Rectangle.prototype.containsPosition = function(pos) {
123: // returns if the given Position lies in this Rectangle
124: return ((pos.x >= this.x)&&(pos.y >= this.y)&&(pos.x <= this.x+this.width)&&(pos.y <= this.y+this.width));
125: }
126: Rectangle.prototype.intersect = function(rect) {
127: // returns the intersection of the given Rectangle and this one
128: var sec = rect.copy();
129: if (sec.x < this.x) {
130: sec.width = sec.width - (this.x - sec.x);
131: sec.x = this.x;
132: }
133: if (sec.y < this.y) {
134: sec.height = sec.height - (this.y - sec.y);
135: sec.y = this.y;
136: }
137: if (sec.x + sec.width > this.x + this.width) {
138: sec.width = (this.x + this.width) - sec.x;
139: }
140: if (sec.y + sec.height > this.y + this.height) {
141: sec.height = (this.y + this.height) - sec.y;
142: }
143: return sec;
144: }
145: Rectangle.prototype.fit = function(rect) {
146: // returns a Rectangle that fits into this one (by moving first)
147: var sec = rect.copy();
148: sec.x = Math.max(sec.x, this.x);
149: sec.x = Math.max(sec.x, this.x);
150: if (sec.x + sec.width > this.x + this.width) {
151: sec.x = this.x + this.width - sec.width;
152: }
153: if (sec.y + sec.height > this.y + this.height) {
154: sec.y = this.y + this.height - sec.height;
155: }
156: return sec.intersect(this);
157: }
158:
159: /*
160: * Transform class
161: *
162: * defines a class of affine transformations
163: */
164: function Transform() {
165: this.m00 = 1.0;
166: this.m01 = 0.0;
167: this.m02 = 0.0;
168: this.m10 = 0.0;
169: this.m11 = 1.0;
170: this.m12 = 0.0;
171: this.m20 = 0.0;
172: this.m21 = 0.0;
173: this.m22 = 1.0;
174: return this;
175: }
176: Transform.prototype.concat = function(traf) {
177: // add Transform traf to this Transform
178: for (var i = 0; i < 3; i++) {
179: for (var j = 0; j < 3; j++) {
180: var c = 0.0;
181: for (var k = 0; k < 3; k++) {
182: c += traf["m"+i+k] * this["m"+k+j];
183: }
184: this["m"+i+j] = c;
185: }
186: }
187: return this;
188: }
189: Transform.prototype.transform = function(rect) {
190: // returns transformed Rectangle or Position with this Transform applied
191: var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
192: var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
193: if (rect.width) {
194: var width = this.m00 * rect.width + this.m01 * rect.height;
195: var height = this.m10 * rect.width + this.m11 * rect.height;
196: return new Rectangle(x, y, width, height);
197: }
198: return new Position(x, y);
199: }
200: Transform.prototype.invtransform = function(pos) {
201: // returns transformed Position pos with the inverse of this Transform applied
202: var det = this.m00 * this.m11 - this.m01 * this.m10;
203: var x = (this.m11 * pos.x - this.m01 * pos.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
204: var y = (- this.m10 * pos.x + this.m00 * pos.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
205: return new Position(x, y);
206: }
207: function getRotation(angle, pos) {
208: // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
209: var traf = new Transform();
210: if (angle != 0) {
211: var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
212: traf.m00 = Math.cos(t);
213: traf.m01 = - Math.sin(t);
214: traf.m10 = Math.sin(t);
215: traf.m11 = Math.cos(t);
216: traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
217: traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
218: }
219: return traf;
220: }
221: function getTranslation(pos) {
222: // returns a Transform that is a translation by [pos.x, pos,y]
223: var traf = new Transform();
224: traf.m02 = pos.x;
225: traf.m12 = pos.y;
226: return traf;
227: }
228: function getScale(size) {
229: // returns a Transform that is a scale by [size.width, size.height]
230: var traf = new Transform();
231: traf.m00 = size.width;
232: traf.m11 = size.height;
233: return traf;
234: }
235:
236:
237: /* **********************************************
238: * parameter routines
239: * ******************************************** */
240:
241: var dlParams = new Object();
242:
243: function newParameter(name, defaultValue, detail) {
244: // create a new parameter with a name and a default value
245: if (defined(dlParams[name])) {
246: alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
247: return false;
248: } else {
249: dlParams[name] = new Object();
250: dlParams[name].defaultValue = defaultValue;
251: dlParams[name].hasValue = false;
252: dlParams[name].value = defaultValue;
253: dlParams[name].detail = detail;
254: return dlParams[name];
255: }
256: }
257:
258: function getParameter(name) {
259: // returns the named parameter value or its default value
260: if (defined(dlParams[name])) {
261: if (dlParams[name].hasValue) {
262: return dlParams[name].value;
263: } else {
264: return dlParams[name].defaultValue;
265: }
266: } else {
267: return null;
268: }
269: }
270:
271: function setParameter(name, value) {
272: // sets parameter value
273: if (defined(dlParams[name])) {
274: dlParams[name].value = value;
275: dlParams[name].hasValue = true;
276: return true;
277: }
278: return false;
279: }
280:
281: function getAllParameters(detail) {
282: // returns a string of all parameters in query format
283: if (! detail) {
284: detail = 10;
285: }
286: var params = new Array();
287: for ( param in dlParams ) {
288: if ((dlParams[param].detail <= detail)&&(dlParams[param].hasValue)) {
289: var val = getParameter(param);
290: if (val != "") {
291: params.push(param + "=" + val);
292: }
293: }
294: }
295: return params.join("&");
296: }
297:
298: function parseParameters(query) {
299: // gets parameter values from query format string
300: var params = query.split("&");
301: for (var i = 0; i < params.length; i++) {
302: var keyval = params[i].split("=");
303: if (keyval.length == 2) {
304: setParameter(keyval[0], keyval[1]);
305: }
306: }
307: }
308:
309:
310: /* **********************************************
311: * HTML/DOM routines
312: * ******************************************** */
313:
314: function getElement(tagid, quiet) {
315: // returns the element object with the id tagid
316: var e;
317: if (document.getElementById) {
318: e = document.getElementById(tagid);
319: } else if (document.all) {
320: alert("document.all!");
321: e = document.all[tagid];
322: } else if (document.layers) {
323: e = document.layers[tagid];
324: }
325: if (e) {
326: return e;
327: } else {
328: if (! quiet) {
329: alert("unable to find element: "+tagid);
330: }
331: return null;
332: }
333: }
334:
335: function getElementPosition(elem) {
336: // returns a Position with the position of the element
337: var x = 0;
338: var y = 0;
339: if (defined(elem.offsetLeft)) {
340: var e = elem;
341: while (e) {
342: if (defined(e.clientLeft)) {
343: // special for IE
344: if (browserType.isMac) {
345: if (e.offsetParent.tagName == "BODY") {
346: // IE for Mac extraspecial
347: x += e.clientLeft;
348: y += e.clientTop;
349: break;
350: }
351: } else {
352: if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
353: x += e.clientLeft;
354: y += e.clientTop;
355: }
356: }
357: }
358: x += e.offsetLeft;
359: y += e.offsetTop;
360: e = e.offsetParent;
361: }
362: } else if (defined(elem.x)) {
363: x = elem.x;
364: y = elem.y;
365: } else if (defined(elem.pageX)) {
366: x = elem.pageX;
367: y = elem.pageY;
368: } else {
369: alert("unable to get position of "+elem+" (id:"+elem.id+")");
370: }
371: return new Position(getInt(x), getInt(y));
372: }
373:
374: function getElementSize(elem) {
375: // returns a Rectangle with the size of the element
376: var width = 0;
377: var height = 0;
378: if (defined(elem.offsetWidth)) {
379: width = elem.offsetWidth;
380: height = elem.offsetHeight;
381: } else if (defined(elem.width)) {
382: width = elem.width;
383: height = elem.height;
384: } else if (defined(elem.clip.width)) {
385: width = elem.clip.width;
386: height = elem.clip.height;
387: } else {
388: alert("unable to get size of "+elem+" (id:"+elem.id+")");
389: }
390: return new Size(getInt(width), getInt(height));
391: }
392:
393: function getElementRect(elem) {
394: // returns a Rectangle with the size and position of the element
395: var pos = getElementPosition(elem);
396: var size = getElementSize(elem);
397: return new Rectangle(pos.x, pos.y, size.width, size.height);
398: }
399:
400:
401:
402: function moveElement(elem, rect) {
403: // moves and sizes the element
404: if (elem.style) {
405: if (defined(rect.x)) {
406: elem.style.left = Math.round(rect.x) + "px";
407: elem.style.top = Math.round(rect.y) + "px";
408: }
409: if (defined(rect.width)) {
410: elem.style.width = Math.round(rect.width) + "px";
411: elem.style.height = Math.round(rect.height) + "px";
412: }
413: } else if (document.layers) {
414: if (defined(rect.x)) {
415: elem.pageX = getInt(rect.x);
416: elem.pageY = getInt(rect.y);
417: }
418: if (defined(rect.width)) {
419: elem.clip.width = getInt(rect.width);
420: elem.clip.height = getInt(rect.height);
421: }
422: } else {
423: alert("moveelement: no style nor layer property!");
424: return false;
425: }
426: return true;
427: }
428:
429: function showElement(elem, show) {
430: // shows or hides the element
431: if (elem.style) {
432: if (show) {
433: elem.style.visibility = "visible";
434: } else {
435: elem.style.visibility = "hidden";
436: }
437: } else if (defined(elem.visibility)) {
438: if (show) {
439: elem.visibility = "show";
440: } else {
441: elem.visibility = "hide";
442: }
443: } else {
444: alert("showelement: no style nor layer property!");
445: }
446: return true;
447: }
448:
449: function evtPosition(evt) {
450: // returns the on-screen Position of the Event
451: var x;
452: var y;
453: evt = (evt) ? evt : window.event;
454: if (!evt) {
455: alert("no event found! "+evt);
456: return;
457: }
458: if (defined(evt.pageX)) {
459: x = parseInt(evt.pageX);
460: y = parseInt(evt.pageY);
461: } else if (defined(evt.clientX)) {
462: x = parseInt(document.body.scrollLeft+evt.clientX);
463: y = parseInt(document.body.scrollTop+evt.clientY);
464: } else {
465: alert("evtPosition: don't know how to deal with "+evt);
466: }
467: return new Position(x, y);
468: }
469:
470: function registerMouseDown(elem, handler) {
471: // register a mouse down event handler on the indicated element
472: if (elem.addEventListener) {
473: elem.addEventListener("mousedown", handler, false);
474: } else {
475: if (elem.captureEvents) {
476: elem.captureEvents(Event.MOUSEDOWN);
477: }
478: elem.onmousedown = handler;
479: }
480: return true;
481: }
482:
483: function unregisterMouseDown(elem, handler) {
484: // unregister the mouse down event handler
485: if (elem.removeEventListener) {
486: elem.removeEventListener("mousedown", handler, false);
487: } else {
488: if (elem.releaseEvents) {
489: elem.releaseEvents(Event.MOUSEDOWN);
490: }
491: elem.onmousedown = null;
492: }
493: return true;
494: }
495:
496: function registerMouseMove(elem, handler) {
497: // register a mouse move event handler on the indicated element
498: if (elem.addEventListener) {
499: elem.addEventListener("mousemove", handler, false);
500: } else {
501: if (elem.captureEvents) {
502: elem.captureEvents(Event.MOUSEMOVE);
503: }
504: elem.onmousemove = handler;
505: }
506: return true;
507: }
508:
509: function unregisterMouseMove(elem, handler) {
510: // unregister the mouse move event handler
511: if (elem.removeEventListener) {
512: elem.removeEventListener("mousemove", handler, false);
513: } else {
514: if (elem.releaseEvents) {
515: elem.releaseEvents(Event.MOUSEMOVE);
516: }
517: elem.onmousemove = null;
518: }
519: return true;
520: }
521:
522: function registerKeyDown(handler) {
523: // register a key down handler
524: if ( document.addEventListener ) {
525: this.document.addEventListener('keypress', handler, false);
526: } else {
527: if (elem.captureEvents) {
528: elem.captureEvents(Event.MOUSEDOWN);
529: }
530: this.document.onkeypress = handler
531: }
532: return true;
533: }
534:
535: function getWinSize() {
536: // returns a Size with the current window size (mostly from www.quirksmode.org)
537: var wsize = new Size(100, 100);
538: if (defined(self.innerHeight)) {
539: // all except Explorer
540: wsize.width = self.innerWidth;
541: wsize.height = self.innerHeight;
542: } else if (document.documentElement && document.documentElement.clientHeight) {
543: // Explorer 6 Strict Mode
544: wsize.width = document.documentElement.clientWidth;
545: wsize.height = document.documentElement.clientHeight;
546: } else if (document.body) {
547: // other Explorers
548: wsize.width = document.body.clientWidth;
549: wsize.height = document.body.clientHeight;
550: }
551: return wsize;
552: }
553:
1.2 ! casties 554: function openWin(url, name, params) {
1.1 casties 555: // open browser window
1.2 ! casties 556: var ow = window.open(url, name, params);
1.1 casties 557: ow.focus();
558: }
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