Annotation of zogiLib/js/baselib.js, revision 1.4
1.3 casties 1: /* Copyright (C) 2003,2004 IT-Group MPIWG, WTWG Uni Bern and others
2:
1.1 casties 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:
1.3 casties 17: Authors:
18: Christian Luginbuehl, 01.05.2003 (first version)
19: DW 24.03.2004 (Changed for digiLib in Zope)
1.4 ! casties 20: Robert Casties, 2.11.2004
1.3 casties 21:
1.1 casties 22: */
23:
1.4 ! casties 24: function base_init() {
! 25: // init function
! 26: baseScriptVersion = "1.1b";
! 27: dlParams = new Object();
! 28: browserType = getBrowserType();
! 29: }
! 30:
! 31:
1.1 casties 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) {
1.4 ! casties 45: // auxiliary function to crop senseless precision
1.1 casties 46: return parseInt(10000*x)/10000;
47: }
48:
1.4 ! casties 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) {
! 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: }
1.4 ! casties 70: return bt;
1.1 casties 71: }
72:
73: // fixes for javascript < 1.2
74: if (! Array.prototype.push) {
75: Array.prototype.push = function(val) {
76: this[this.length] = val;
77: return this.length;
78: }
79: Array.prototype.pop = function() {
80: var val = this[this.length-1];
81: this.length -= 1;
82: return val;
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: }
1.4 ! casties 99: Size.prototype.toString = function() {
! 100: return this.width + "x" + this.height;
! 101: }
! 102:
1.1 casties 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: }
1.4 ! casties 112: Position.prototype.toString = function() {
! 113: return this.x + "," + this.y;
! 114: }
1.1 casties 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: }
1.4 ! casties 126: Rectangle.prototype.toString = function() {
! 127: return this.width+"x"+this.height+"@"+this.x+","+this.y;
! 128: }
1.1 casties 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) {
153: sec.width = sec.width - (this.x - sec.x);
154: sec.x = this.x;
155: }
156: if (sec.y < this.y) {
157: sec.height = sec.height - (this.y - sec.y);
158: sec.y = this.y;
159: }
160: if (sec.x + sec.width > this.x + this.width) {
161: sec.width = (this.x + this.width) - sec.x;
162: }
163: if (sec.y + sec.height > this.y + this.height) {
164: sec.height = (this.y + this.height) - sec.y;
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) {
174: sec.x = this.x + this.width - sec.width;
175: }
176: if (sec.y + sec.height > this.y + this.height) {
177: sec.y = this.y + this.height - sec.height;
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++) {
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: }
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) {
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);
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) {
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);
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])) {
267: alert("Fatal: An object with name '" + name + "' already exists - cannot recreate!");
268: return false;
269: } else {
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];
276: }
277: }
278:
279: function getParameter(name) {
280: // returns the named parameter value or its default value
281: if (defined(dlParams[name])) {
282: if (dlParams[name].hasValue) {
283: return dlParams[name].value;
284: } else {
285: return dlParams[name].defaultValue;
286: }
287: } else {
288: return null;
289: }
290: }
291:
292: function setParameter(name, value) {
293: // sets parameter value
294: if (defined(dlParams[name])) {
295: dlParams[name].value = value;
296: dlParams[name].hasValue = true;
297: return true;
298: }
299: return false;
300: }
301:
1.4 ! casties 302: function hasParameter(name) {
! 303: // returns if the parameter's value has been set
! 304: if (defined(dlParams[name])) {
! 305: return dlParams[name].hasValue;
! 306: }
! 307: return false;
! 308: }
! 309:
1.1 casties 310: function getAllParameters(detail) {
311: // returns a string of all parameters in query format
312: if (! detail) {
313: detail = 10;
314: }
315: var params = new Array();
316: for ( param in dlParams ) {
317: if ((dlParams[param].detail <= detail)&&(dlParams[param].hasValue)) {
318: var val = getParameter(param);
319: if (val != "") {
320: params.push(param + "=" + val);
321: }
322: }
323: }
324: return params.join("&");
325: }
326:
327: function parseParameters(query) {
328: // gets parameter values from query format string
329: var params = query.split("&");
330: for (var i = 0; i < params.length; i++) {
331: var keyval = params[i].split("=");
332: if (keyval.length == 2) {
333: setParameter(keyval[0], keyval[1]);
334: }
335: }
336: }
337:
338:
339: /* **********************************************
340: * HTML/DOM routines
341: * ******************************************** */
342:
343: function getElement(tagid, quiet) {
344: // returns the element object with the id tagid
345: var e;
346: if (document.getElementById) {
347: e = document.getElementById(tagid);
348: } else if (document.all) {
349: alert("document.all!");
350: e = document.all[tagid];
351: } else if (document.layers) {
352: e = document.layers[tagid];
353: }
354: if (e) {
355: return e;
356: } else {
357: if (! quiet) {
358: alert("unable to find element: "+tagid);
359: }
360: return null;
361: }
362: }
363:
364: function getElementPosition(elem) {
365: // returns a Position with the position of the element
366: var x = 0;
367: var y = 0;
368: if (defined(elem.offsetLeft)) {
369: var e = elem;
370: while (e) {
371: if (defined(e.clientLeft)) {
372: // special for IE
373: if (browserType.isMac) {
374: if (e.offsetParent.tagName == "BODY") {
375: // IE for Mac extraspecial
376: x += e.clientLeft;
377: y += e.clientTop;
378: break;
379: }
380: } else {
381: if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
382: x += e.clientLeft;
383: y += e.clientTop;
384: }
385: }
386: }
387: x += e.offsetLeft;
388: y += e.offsetTop;
389: e = e.offsetParent;
390: }
391: } else if (defined(elem.x)) {
392: x = elem.x;
393: y = elem.y;
394: } else if (defined(elem.pageX)) {
395: x = elem.pageX;
396: y = elem.pageY;
397: } else {
398: alert("unable to get position of "+elem+" (id:"+elem.id+")");
399: }
400: return new Position(getInt(x), getInt(y));
401: }
402:
403: function getElementSize(elem) {
404: // returns a Rectangle with the size of the element
405: var width = 0;
406: var height = 0;
407: if (defined(elem.offsetWidth)) {
408: width = elem.offsetWidth;
409: height = elem.offsetHeight;
410: } else if (defined(elem.width)) {
411: width = elem.width;
412: height = elem.height;
413: } else if (defined(elem.clip.width)) {
414: width = elem.clip.width;
415: height = elem.clip.height;
416: } else {
417: alert("unable to get size of "+elem+" (id:"+elem.id+")");
418: }
419: return new Size(getInt(width), getInt(height));
420: }
421:
422: function getElementRect(elem) {
423: // returns a Rectangle with the size and position of the element
424: var pos = getElementPosition(elem);
425: var size = getElementSize(elem);
426: return new Rectangle(pos.x, pos.y, size.width, size.height);
427: }
428:
429:
430:
431: function moveElement(elem, rect) {
432: // moves and sizes the element
433: if (elem.style) {
434: if (defined(rect.x)) {
435: elem.style.left = Math.round(rect.x) + "px";
436: elem.style.top = Math.round(rect.y) + "px";
437: }
438: if (defined(rect.width)) {
439: elem.style.width = Math.round(rect.width) + "px";
440: elem.style.height = Math.round(rect.height) + "px";
441: }
442: } else if (document.layers) {
443: if (defined(rect.x)) {
444: elem.pageX = getInt(rect.x);
445: elem.pageY = getInt(rect.y);
446: }
447: if (defined(rect.width)) {
448: elem.clip.width = getInt(rect.width);
449: elem.clip.height = getInt(rect.height);
450: }
451: } else {
452: alert("moveelement: no style nor layer property!");
453: return false;
454: }
455: return true;
456: }
457:
458: function showElement(elem, show) {
459: // shows or hides the element
460: if (elem.style) {
461: if (show) {
462: elem.style.visibility = "visible";
463: } else {
464: elem.style.visibility = "hidden";
465: }
466: } else if (defined(elem.visibility)) {
467: if (show) {
468: elem.visibility = "show";
469: } else {
470: elem.visibility = "hide";
471: }
472: } else {
473: alert("showelement: no style nor layer property!");
474: }
475: return true;
476: }
477:
478: function evtPosition(evt) {
479: // returns the on-screen Position of the Event
480: var x;
481: var y;
482: evt = (evt) ? evt : window.event;
483: if (!evt) {
484: alert("no event found! "+evt);
485: return;
486: }
487: if (defined(evt.pageX)) {
488: x = parseInt(evt.pageX);
489: y = parseInt(evt.pageY);
490: } else if (defined(evt.clientX)) {
491: x = parseInt(document.body.scrollLeft+evt.clientX);
492: y = parseInt(document.body.scrollTop+evt.clientY);
493: } else {
494: alert("evtPosition: don't know how to deal with "+evt);
495: }
496: return new Position(x, y);
497: }
498:
1.3 casties 499: function registerEvent(type, elem, handler) {
500: // register the given event handler on the indicated element
1.4 ! casties 501: if (elem.addEventListener) {
! 502: elem.addEventListener(type, handler, false);
! 503: } else {
! 504: if (type == "mousedown") {
! 505: if (elem.captureEvents) {
! 506: elem.captureEvents(Event.MOUSEDOWN);
! 507: }
! 508: elem.onmousedown = handler;
! 509: } else if (type == "mouseup") {
! 510: if (elem.captureEvents) {
! 511: elem.captureEvents(Event.MOUSEUP);
! 512: }
! 513: elem.onmouseup = handler;
! 514: } else if (type == "mousemove") {
! 515: if (elem.captureEvents) {
! 516: elem.captureEvents(Event.MOUSEMOVE);
! 517: }
! 518: elem.onmousemove = handler;
! 519: } else if (type == "keypress") {
! 520: if (elem.captureEvents) {
! 521: elem.captureEvents(Event.KEYPRESS);
! 522: }
! 523: elem.onkeypress = handler;
! 524: } else {
! 525: alert("registerEvent: unknown event type "+type);
! 526: return false;
! 527: }
1.1 casties 528: }
529: return true;
530: }
531:
1.3 casties 532: function unregisterEvent(type, elem, handler) {
533: // unregister the given event handler from the indicated element
1.4 ! casties 534: if (elem.removeEventListener) {
! 535: elem.removeEventListener(type, handler, false);
! 536: } else {
! 537: if (type == "mousedown") {
! 538: if (elem.releaseEvents) {
! 539: elem.releaseEvents(Event.MOUSEDOWN);
! 540: }
! 541: elem.onmousedown = null;
! 542: } else if (type == "mouseup") {
! 543: if (elem.releaseEvents) {
! 544: elem.releaseEvents(Event.MOUSEUP);
! 545: }
! 546: elem.onmouseup = null;
! 547: } else if (type == "mousemove") {
! 548: if (elem.releaseEvents) {
! 549: elem.releaseEvents(Event.MOUSEMOVE);
! 550: }
! 551: elem.onmousemove = null;
! 552: } else if (type == "keypress") {
! 553: if (elem.releaseEvents) {
! 554: elem.releaseEvents(Event.KEYPRESS);
! 555: }
! 556: elem.onkeypress = null;
! 557: } else {
! 558: alert("unregisterEvent: unknown event type "+type);
! 559: return false;
! 560: }
1.1 casties 561: }
562: return true;
563: }
564:
1.3 casties 565:
566: // old registerXXYY API for compatibility
567: function registerMouseDown(elem, handler) {
568: return registerEvent("mousedown", elem, handler);
569: }
570: function unregisterMouseDown(elem, handler) {
571: return unregisterEvent("mousedown", elem, handler);
572: }
1.1 casties 573: function registerMouseMove(elem, handler) {
1.3 casties 574: return registerEvent("mousemove", elem, handler);
1.1 casties 575: }
576: function unregisterMouseMove(elem, handler) {
1.3 casties 577: return unregisterEvent("mousemove", elem, handler);
1.1 casties 578: }
579: function registerKeyDown(handler) {
1.3 casties 580: return registerEvent("keypress", elem, handler);
1.1 casties 581: }
1.3 casties 582:
1.1 casties 583:
584: function getWinSize() {
585: // returns a Size with the current window size (mostly from www.quirksmode.org)
586: var wsize = new Size(100, 100);
587: if (defined(self.innerHeight)) {
588: // all except Explorer
1.4 ! casties 589: if ((self.innerWidth == 0)||(self.innerHeight == 0)) {
! 590: // Safari 1.2 bug
! 591: if (parent) {
! 592: parent.innerHeight;
! 593: parent.innerWidth;
! 594: }
! 595: }
1.1 casties 596: wsize.width = self.innerWidth;
597: wsize.height = self.innerHeight;
598: } else if (document.documentElement && document.documentElement.clientHeight) {
599: // Explorer 6 Strict Mode
600: wsize.width = document.documentElement.clientWidth;
601: wsize.height = document.documentElement.clientHeight;
602: } else if (document.body) {
603: // other Explorers
604: wsize.width = document.body.clientWidth;
605: wsize.height = document.body.clientHeight;
606: }
607: return wsize;
608: }
609:
1.2 casties 610: function openWin(url, name, params) {
1.1 casties 611: // open browser window
1.2 casties 612: var ow = window.open(url, name, params);
1.1 casties 613: ow.focus();
614: }
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