Annotation of zogiLib/js/dllib.js, revision 1.7
1.2 casties 1: /* Copyright (C) 2003,2004 IT-Group MPIWG, WTWG Uni Bern and others
1.1 casties 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:
1.2 casties 17: Authors:
18: Christian Luginbuehl, 01.05.2003 (first version)
19: DW 24.03.2004 (Changed for digiLib in Zope)
1.7 ! casties 20: Robert Casties, 8.11.2005
1.1 casties 21:
1.2 casties 22: ! Requires baselib.js !
1.1 casties 23:
24: */
25:
1.5 casties 26:
27: function identify() {
1.6 casties 28: // used for identifying a digilib instance
29: // Relato uses that function - lugi
30: return "Digilib 0.6";
1.5 casties 31: }
32:
1.1 casties 33:
34: /*
35: * more parameter handling
36: */
37:
38: function parseArea() {
39: // returns area Rectangle from current parameters
40: return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh"));
41: }
42:
43: function setParamFromArea(rect) {
44: // sets digilib wx etc. from rect
45: setParameter("wx", cropFloat(rect.x));
46: setParameter("wy", cropFloat(rect.y));
47: setParameter("ww", cropFloat(rect.width));
48: setParameter("wh", cropFloat(rect.height));
49: return true;
50: }
51:
52: function parseTrafo(elem) {
53: // returns Transform from current dlArea and picsize
54: var picsize = getElementRect(elem);
55: var trafo = new Transform();
56: // subtract area offset and size
57: trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
58: trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
59: // scale to screen size
60: trafo.concat(getScale(picsize));
61: trafo.concat(getTranslation(picsize));
62: // rotate
63: //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height)));
64: // mirror
65: //if (hasFlag("hmir")) {
66: //trafo.m00 = - trafo.m00;
67: //}
68: //if (hasFlag("vmir")) {
69: //trafo.m11 = - trafo.m11;
70: //}
71: return trafo;
72: }
73:
74:
75: function parseMarks() {
76: // returns marks array from current parameters
77: var marks = new Array();
78: var ma;
79: var mk = getParameter("mk");
80: if (mk.indexOf(";") >= 0) {
1.6 casties 81: // old format with ";"
82: ma = mk.split(";");
1.1 casties 83: } else {
1.6 casties 84: ma = mk.split(",");
1.1 casties 85: }
86: for (var i = 0; i < ma.length ; i++) {
1.6 casties 87: var pos = ma[i].split("/");
88: if (pos.length > 1) {
89: marks.push(new Position(pos[0], pos[1]));
90: }
1.1 casties 91: }
92: return marks;
93: }
94:
95: function getAllMarks() {
96: // returns a string with all marks in query format
97: var marks = new Array();
98: for (var i = 0; i < dlMarks.length; i++) {
1.6 casties 99: marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y));
1.1 casties 100: }
101: return marks.join(",");
102: }
103:
104: function addMark(pos) {
105: // add a mark
106: dlMarks.push(pos);
107: setParameter("mk", getAllMarks());
108: return true;
109: }
110:
111: function deleteMark() {
112: // delete the last mark
113: dlMarks.pop();
114: setParameter("mk", getAllMarks());
115: return true;
116: }
117:
118: function hasFlag(mode) {
119: // returns if mode flag is set
120: return (dlFlags[mode]);
121: }
122:
123: function addFlag(mode) {
124: // add a mode flag
125: dlFlags[mode] = mode;
126: setParameter("mo", getAllFlags());
127: return true;
128: }
129:
130: function removeFlag(mode) {
131: // remove a mode flag
132: if (dlFlags[mode]) {
1.6 casties 133: delete dlFlags[mode];
1.1 casties 134: }
135: setParameter("mo", getAllFlags());
136: return true;
137: }
138:
139: function toggleFlag(mode) {
140: // change a mode flag
141: if (dlFlags[mode]) {
1.6 casties 142: delete dlFlags[mode];
1.1 casties 143: } else {
1.6 casties 144: dlFlags[mode] = mode;
1.1 casties 145: }
146: setParameter("mo", getAllFlags());
147: return true;
148: }
149:
150: function getAllFlags() {
151: // returns a string with all flags in query format
152: var fa = new Array();
153: for (var f in dlFlags) {
1.6 casties 154: if ((f != "")&&(dlFlags[f] != null)) {
155: fa.push(f);
156: }
1.1 casties 157: }
158: return fa.join(",");
159: }
160:
161: function parseFlags() {
162: // sets dlFlags from the current parameters
163: var flags = new Object();
164: var fa = getParameter("mo").split(",");
165: for (var i = 0; i < fa.length ; i++) {
1.6 casties 166: var f = fa[i];
167: if (f != "") {
168: flags[f] = f;
169: }
1.1 casties 170: }
171: return flags;
172: }
173:
174:
175: function bestPicSize(elem, inset) {
176: // returns a Size with the best image size for the given element
177: if (! defined(inset)) {
1.6 casties 178: inset = 25;
1.1 casties 179: }
180: var ws = getWinSize();
181: var es = getElementPosition(elem);
182: if (es) {
1.6 casties 183: ws.width = ws.width - es.x - inset;
184: ws.height = ws.height - es.y - inset;
1.1 casties 185: }
186: return ws;
187: }
188:
1.7 ! casties 189: function setDLParam(e, s, relative) {
1.6 casties 190: // sets parameter based on HTML event
191: var nam;
192: var val;
193: if (s.type && (s.type == "select-one")) {
194: nam = s.name;
195: val = s.options[s.selectedIndex].value;
196: } else if (s.name && s.value) {
197: nam = s.name;
198: val = s.value;
199: }
200: if (nam && val) {
1.7 ! casties 201: setParameter(nam, val, relative);
1.6 casties 202: display();
203: } else {
1.7 ! casties 204: alert("ERROR: unable to process event!");
1.6 casties 205: }
206: return true;
207: }
208:
1.1 casties 209:
210: /* **********************************************
211: * digilib specific routines
212: * ******************************************** */
213:
214:
215: function dl_param_init() {
216: // parameter initialisation before onload
1.5 casties 217: if (!baseScriptVersion) {
1.6 casties 218: base_init();
1.5 casties 219: }
1.7 ! casties 220: dlScriptVersion = "1.2b";
1.5 casties 221: dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
222: dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
223: dlTrafo = new Transform();
224: dlMarks = new Array();
225: dlFlags = new Object();
226: elemScaler = null;
227: picElem = null;
228: ZOOMFACTOR = Math.sqrt(2);
1.1 casties 229:
230: // put the query parameters (sans "?") in the parameters array
231: parseParameters(location.search.slice(1));
232: // treat special parameters
233: dlMarks = parseMarks();
234: dlArea = parseArea();
235: dlFlags = parseFlags();
236: }
237:
238:
239: function dl_init() {
240: // initalisation on load
1.5 casties 241: if (!dlScriptVersion) {
1.6 casties 242: dl_param_init();
1.5 casties 243: }
1.1 casties 244: elemScaler = getElement("scaler", true);
245: picElem = getElement("pic", true);
246: if (picElem == null && elemScaler) {
1.6 casties 247: // in N4 pic is in the scaler layer
248: picElem = elemScaler.document.images[0];
1.1 casties 249: }
250: if ((!elemScaler)||(!picElem)) {
1.6 casties 251: alert("Sorry, digilib doesn't work here!");
252: return false;
1.1 casties 253: }
254: // give a name to the window containing digilib
255: if (defined(dlTarget)&&(dlTarget)) {
1.6 casties 256: window.name = dlTarget;
1.1 casties 257: } else {
1.6 casties 258: window.name = "digilib";
1.1 casties 259: }
260: // put the query parameters (sans "?") in the parameters array
261: parseParameters(location.search.slice(1));
262: // treat special parameters
263: dlMarks = parseMarks();
264: dlArea = parseArea();
265: dlFlags = parseFlags();
266: // wait for image to load and display marks
267: renderMarks();
268: // done
269: focus();
270: return;
271: }
272:
273:
274: function display(detail) {
275: // redisplay the page
276: if (! detail) {
1.7 ! casties 277: detail = 255;
1.1 casties 278: }
279: var queryString = getAllParameters(detail);
280: location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
281: }
282:
283:
284: /* **********************************************
285: * interactive digilib functions
286: * ******************************************** */
287:
288:
289: function renderMarks() {
290: // put the visible marks on the image
291: var mark_count = dlMarks.length;
292: // make shure the image is loaded so we know its size
293: if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) {
1.6 casties 294: setTimeout("renderMarks()", 100);
1.1 casties 295: } else {
1.6 casties 296: dlTrafo = parseTrafo(picElem);
297: for (var i = 0; i < 8; i++) {
298: var me = getElement("dot"+i);
299: if (i < mark_count) {
300: if (dlArea.containsPosition(dlMarks[i])) {
301: var mpos = dlTrafo.transform(dlMarks[i]);
302: // suboptimal to place -5 pixels and not half size of mark-image
303: mpos.x = mpos.x -5;
304: mpos.y = mpos.y -5;
305: moveElement(me, mpos);
306: showElement(me, true);
307: }
308: } else {
309: // hide the other marks
310: showElement(me, false);
311: }
312: }
1.1 casties 313: }
314: }
315:
316:
317: function setMark(reload) {
318: // add a mark where clicked
319: if ( dlMarks.length > 7 ) {
1.6 casties 320: alert("Only 8 marks are possible at the moment!");
321: return;
1.1 casties 322: }
1.2 casties 323: window.focus();
1.1 casties 324:
325: function markEvent(evt) {
1.6 casties 326: // event handler adding a new mark
327: unregisterEvent("mousedown", elemScaler, markEvent);
328: var p = dlTrafo.invtransform(evtPosition(evt));
329: addMark(p);
330: if (defined(reload)&&(!reload)) {
331: // don't redisplay
332: renderMarks();
333: return;
334: }
335: display();
1.1 casties 336: }
337:
338: // starting event capture
1.2 casties 339: registerEvent("mousedown", elemScaler, markEvent);
1.1 casties 340: }
341:
342:
343: function removeMark(reload) {
344: // remove the last mark
345: deleteMark();
346: if (defined(reload)&&(!reload)) {
1.6 casties 347: // don't redisplay
348: renderMarks();
349: return;
1.1 casties 350: }
351: display();
352: }
353:
354:
355: function zoomArea() {
356: var click = 1;
357: var pt1, pt2;
358: var eck1pos, eck2pos, eck3pos, eck4pos;
359: window.focus();
360: var eck1 = getElement("eck1");
361: var eck2 = getElement("eck2");
362: var eck3 = getElement("eck3");
363: var eck4 = getElement("eck4");
364:
365: function zoomClick(evt) {
1.6 casties 366: // mouse click handler
367: if (click == 1) {
368: // first click -- start moving
369: click = 2;
370: pt1 = evtPosition(evt);
371: pt2 = pt1;
372: eck1pos = pt1;
373: eck2pos = new Position(pt1.x - 12, pt1.y);
374: eck3pos = new Position(pt1.x, pt1.y - 12);
375: eck4pos = new Position(pt1.y - 12, pt1.y - 12);
376: moveElement(eck1, eck1pos);
377: moveElement(eck2, eck2pos);
378: moveElement(eck3, eck3pos);
379: moveElement(eck4, eck4pos);
380: showElement(eck1, true);
381: showElement(eck2, true);
382: showElement(eck3, true);
383: showElement(eck4, true);
384: // show moving
385: registerEvent("mousemove", elemScaler, zoomMove);
386: registerEvent("mousemove", eck4, zoomMove);
387: // enable drag-to-zoom
388: registerEvent("mouseup", elemScaler, zoomClick);
389: registerEvent("mouseup", eck4, zoomClick);
390: } else {
391: // second click -- end moving
392: pt2 = evtPosition(evt);
393: showElement(eck1, false);
394: showElement(eck2, false);
395: showElement(eck3, false);
396: showElement(eck4, false);
397: unregisterEvent("mousemove", elemScaler, zoomMove);
398: unregisterEvent("mousemove", eck4, zoomMove);
399: unregisterEvent("mousedown", elemScaler, zoomClick);
400: unregisterEvent("mousedown", eck4, zoomClick);
401: var p1 = dlTrafo.invtransform(pt1);
402: var p2 = dlTrafo.invtransform(pt2);
403: var ww = p2.x-p1.x;
404: var wh = p2.y-p1.y;
405: if ((ww > 0)&&(wh > 0)) {
406: setParameter("wx", cropFloat(p1.x));
407: setParameter("wy", cropFloat(p1.y));
408: setParameter("ww", cropFloat(ww));
409: setParameter("wh", cropFloat(wh));
410: parseArea();
411: // zoomed is always fit
412: setParameter("ws", 1);
413: display();
414: }
415: }
1.1 casties 416: }
417:
418: function zoomMove(evt) {
1.6 casties 419: // mouse move handler
420: pt2 = evtPosition(evt);
421: // restrict marks to move right and down
422: eck1pos = pt1;
423: eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y);
424: eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12);
425: eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12);
426: moveElement(eck1, eck1pos);
427: moveElement(eck2, eck2pos);
428: moveElement(eck3, eck3pos);
429: moveElement(eck4, eck4pos);
1.1 casties 430: }
431:
432: // starting event capture
1.2 casties 433: registerEvent("mousedown", elemScaler, zoomClick);
434: registerEvent("mousedown", eck4, zoomClick);
1.1 casties 435: }
436:
437: function zoomBy(factor) {
438: // zooms by the given factor
439: var newarea = dlArea.copy();
440: newarea.width /= factor;
441: newarea.height /= factor;
442: newarea.x -= 0.5 * (newarea.width - dlArea.width);
443: newarea.y -= 0.5 * (newarea.height - dlArea.height);
444: newarea = dlMaxArea.fit(newarea);
445: setParamFromArea(newarea);
446: display();
447: }
448:
449:
450: function zoomFullpage() {
451: // zooms out to show the whole image
452: setParameter("wx", 0.0);
453: setParameter("wy", 0.0);
454: setParameter("ww", 1.0);
455: setParameter("wh", 1.0);
456: display();
457: }
458:
459:
460: function moveCenter() {
461: // move visible area so that it's centered around the clicked point
462: if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) {
1.7 ! casties 463: // nothing to do
1.6 casties 464: return;
1.1 casties 465: }
466: window.focus();
467:
468: function moveCenterEvent(evt) {
1.6 casties 469: // move to handler
470: unregisterEvent("mousedown", elemScaler, moveCenterEvent);
471: var pt = dlTrafo.invtransform(evtPosition(evt));
472: var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height);
473: newarea = dlMaxArea.fit(newarea);
474: // set parameters
475: setParamFromArea(newarea);
476: parseArea();
477: display();
1.1 casties 478: }
479:
480: // starting event capture
1.2 casties 481: registerEvent("mousedown", elemScaler, moveCenterEvent);
1.1 casties 482: }
483:
1.5 casties 484: function moveBy(movx, movy) {
1.6 casties 485: // move visible area by movx and movy (in units of ww, wh)
1.5 casties 486: if ((dlArea.width == 1.0)&&(dlArea.height == 1.0)) {
1.6 casties 487: // nothing to do
488: return;
1.5 casties 489: }
490: var newarea = dlArea.copy();
491: newarea.x += parseFloat(movx)*dlArea.width;
492: newarea.y += parseFloat(movy)*dlArea.height;
493: newarea = dlMaxArea.fit(newarea);
494: // set parameters
495: setParamFromArea(newarea);
496: parseArea();
497: display();
498: }
499:
1.1 casties 500: function getRef() {
501: // returns a reference to the current digilib set
502: if (! baseUrl) {
1.6 casties 503: var baseUrl = location.protocol + "//" + location.host + location.pathname;
1.1 casties 504: }
505: var hyperlinkRef = baseUrl;
1.7 ! casties 506: var par = getAllParameters(7+16); // all without ddpi, pt
1.1 casties 507: if (par.length > 0) {
1.6 casties 508: hyperlinkRef += "?" + par;
1.1 casties 509: }
510: return hyperlinkRef;
511: }
1.3 casties 512:
513: function getRefWin(type, msg) {
514: // shows an alert with a reference to the current digilib set
515: if (! msg) {
1.6 casties 516: msg = "Link for HTML documents";
1.4 casties 517: }
1.3 casties 518: prompt(msg, getRef());
1.5 casties 519: }
1.6 casties 520:
521: function getQuality() {
522: // returns the current q setting
523: for (var i = 0; i < 3; i++) {
524: if (hasFlag("q"+i)) {
525: return i;
526: }
527: }
528: return 1
529: }
530:
531: function setQuality(qual) {
532: // set the image quality
533: for (var i = 0; i < 3; i++) {
534: removeFlag("q"+i);
535: if (i == qual) {
536: addFlag("q"+i);
537: }
538: }
539: setParameter("mo", getAllFlags());
540: display();
541: }
542:
543: function setQualityWin(msg) {
544: // dialog for setting quality
545: if (! msg) {
546: msg = "Quality (0..2)";
547: }
548: var q = getQuality();
549: var newq = window.prompt(msg, q);
550: if (newq) {
551: setQuality(newq);
552: }
553: }
554:
555: function mirror(dir) {
556: // mirror the image horizontally or vertically
557: if (dir == "h") {
558: toggleFlag("hmir");
559: } else {
560: toggleFlag("vmir");
561: }
562: setParameter("mo", getAllFlags());
563: display();
564: }
565:
1.7 ! casties 566: function gotoPage(gopage, keep) {
! 567: // goto given page nr (+/-: relative)
! 568: var oldpn = parseInt(getParameter("pn"));
! 569: setParameter("pn", gopage, true);
1.6 casties 570: var pn = parseInt(getParameter("pn"));
571: if (pn < 1) {
1.7 ! casties 572: alert("No such page! (Page number too low)");
! 573: setParameter("pn", oldpn);
! 574: return;
! 575: }
! 576: if (hasParameter("pt")) {
! 577: pt = parseInt(getParameter("pt"))
! 578: if (pn > pt) {
! 579: alert("No such page! (Page number too high)");
! 580: setParameter("pn", oldpn);
! 581: return;
! 582: }
! 583: }
! 584: if (keep) {
! 585: display(15+32); // all, no mark
! 586: } else {
! 587: display(3+32); // fn, pn, ws, mo + pt
1.6 casties 588: }
589: }
590:
591: function gotoPageWin() {
592: // dialog to ask for new page nr
1.7 ! casties 593: var pn = getParameter("pn");
1.6 casties 594: var gopage = window.prompt("Go to page", pn);
595: if (gopage) {
596: gotoPage(gopage);
597: }
598: }
599:
1.7 ! casties 600: function setParamWin(param, text, relative) {
1.6 casties 601: // dialog to ask for new parameter value
602: var val = getParameter(param);
603: var newval = window.prompt(text, val);
604: if (newval) {
1.7 ! casties 605: setParameter(param, newval, relative);
1.6 casties 606: display();
607: }
608: }
609:
610: function showOptions(show) {
611: // show or hide option div
612: var elem = getElement("dloptions");
613: showElement(elem, show);
614: }
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