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comparison client/src/main/webapp/jquery/jquery.digilib.js @ 883:7ffb45138f61 mvnify

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rearrange sources to maven directory standard
author robcast
date Tue, 19 Apr 2011 18:44:25 +0200
parents client/digitallibrary/jquery/jquery.digilib.js@b95510ec127b
children ec077cb6a8dc
comparison
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882:2bba166f4608 883:7ffb45138f61
1 /* Copyright (c) 2011 Martin Raspe, Robert Casties
2
3 This program is free software: you can redistribute it and/or modify
4 it under the terms of the GNU Lesser General Public License as published by
5 the Free Software Foundation, either version 2 of the License, or
6 (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 Lesser General Public License for more details.
12
13 You should have received a copy of the GNU Lesser General Public License
14 along with this program. If not, see <http://www.gnu.org/licenses/>.
15
16 Authors:
17 Martin Raspe, Robert Casties, 11.1.2011
18 */
19
20 /**
21 * digilib jQuery plugin
22 **/
23
24 /*jslint browser: true, debug: true, forin: true
25 */
26
27 // fallback for console.log calls
28 if (typeof console === 'undefined') {
29 var console = {
30 log : function(){},
31 debug : function(){},
32 error : function(){}
33 };
34 var customConsole = false; // set to true if debugging for MS IE
35 }
36
37 (function($) {
38 var buttons = {
39 reference : {
40 onclick : "reference",
41 tooltip : "get a reference URL",
42 icon : "reference.png"
43 },
44 zoomin : {
45 onclick : ["zoomBy", 1.4],
46 tooltip : "zoom in",
47 icon : "zoom-in.png"
48 },
49 zoomout : {
50 onclick : ["zoomBy", 0.7],
51 tooltip : "zoom out",
52 icon : "zoom-out.png"
53 },
54 zoomarea : {
55 onclick : "zoomArea",
56 tooltip : "zoom area",
57 icon : "zoom-area.png"
58 },
59 zoomfull : {
60 onclick : "zoomFull",
61 tooltip : "view the whole image",
62 icon : "zoom-full.png"
63 },
64 pagewidth : {
65 onclick : ["zoomFull", "width"],
66 tooltip : "page width",
67 icon : "pagewidth.png"
68 },
69 back : {
70 onclick : ["gotoPage", "-1"],
71 tooltip : "goto previous image",
72 icon : "back.png"
73 },
74 fwd : {
75 onclick : ["gotoPage", "+1"],
76 tooltip : "goto next image",
77 icon : "fwd.png"
78 },
79 page : {
80 onclick : "gotoPage",
81 tooltip : "goto image number",
82 icon : "page.png"
83 },
84 help : {
85 onclick : "showAboutDiv",
86 tooltip : "about Digilib",
87 icon : "help.png"
88 },
89 reset : {
90 onclick : "reset",
91 tooltip : "reset image",
92 icon : "reset.png"
93 },
94 mark : {
95 onclick : "setMark",
96 tooltip : "set a mark",
97 icon : "mark.png"
98 },
99 delmark : {
100 onclick : "removeMark",
101 tooltip : "delete the last mark",
102 icon : "delmark.png"
103 },
104 hmir : {
105 onclick : ["mirror", "h"],
106 tooltip : "mirror horizontally",
107 icon : "mirror-horizontal.png"
108 },
109 vmir : {
110 onclick : ["mirror", "v"],
111 tooltip : "mirror vertically",
112 icon : "mirror-vertical.png"
113 },
114 rot : {
115 onclick : "rotate",
116 tooltip : "rotate image",
117 icon : "rotate.png"
118 },
119 brgt : {
120 onclick : "brightness",
121 tooltip : "set brightness",
122 icon : "brightness.png"
123 },
124 cont : {
125 onclick : "contrast",
126 tooltip : "set contrast",
127 icon : "contrast.png"
128 },
129 rgb : {
130 onclick : "javascript:setParamWin('rgb', '...')",
131 tooltip : "set rgb values",
132 icon : "rgb.png"
133 },
134 quality : {
135 onclick : "setQuality",
136 tooltip : "set image quality",
137 icon : "quality.png"
138 },
139 size : {
140 onclick : "javascript:toggleSizeMenu()",
141 tooltip : "set page size",
142 icon : "size.png"
143 },
144 calibrationx : {
145 onclick : "calibrate",
146 tooltip : "calibrate screen resolution",
147 icon : "calibration-x.png"
148 },
149 scale : {
150 onclick : "setScaleMode",
151 tooltip : "change image scale",
152 icon : "original-size.png"
153 },
154 toggleoptions : {
155 onclick : "moreButtons",
156 tooltip : "more options",
157 icon : "options.png"
158 },
159 moreoptions : {
160 onclick : ["moreButtons", "+1"],
161 tooltip : "more options",
162 icon : "options.png"
163 },
164 lessoptions : {
165 onclick : ["moreButtons", "-1"],
166 tooltip : "less options",
167 icon : "options.png"
168 },
169 up : {
170 onclick : ["moveZoomArea", 0, -1],
171 tooltip : "move zoom area up",
172 icon : "up.png"
173 },
174 down : {
175 onclick : ["moveZoomArea", 0, 1],
176 tooltip : "move zoom area down",
177 icon : "down.png"
178 },
179 left : {
180 onclick : ["moveZoomArea", -1, 0],
181 tooltip : "move zoom area left",
182 icon : "left.png"
183 },
184 right : {
185 onclick : ["moveZoomArea", 1, 0],
186 tooltip : "move zoom area right",
187 icon : "right.png"
188 },
189 SEP : {
190 icon : "sep.png"
191 }
192 };
193
194 var defaults = {
195 // version of this script
196 'version' : 'jquery.digilib.js 0.9',
197 // logo url
198 'logoUrl' : '../img/digilib-logo-text1.png',
199 // homepage url (behind logo)
200 'homeUrl' : 'http://digilib.berlios.de',
201 // base URL to digilib viewer (for reference URLs)
202 'digilibBaseUrl' : null,
203 // base URL to Scaler servlet
204 'scalerBaseUrl' : null,
205 // list of Scaler parameters
206 'scalerParamNames' : ['fn','pn','dw','dh','ww','wh','wx','wy','ws','mo',
207 'rot','cont','brgt','rgbm','rgba','ddpi','ddpix','ddpiy'],
208 // Scaler parameter defaults
209 'pn' : 1,
210 'ww' : 1.0,
211 'wh' : 1.0,
212 'wx' : 0.0,
213 'wy' : 0.0,
214 'ws' : 1.0,
215 'mo' : '',
216 'rot' : 0,
217 'cont' : 0,
218 'brgt' : 0,
219 'rgbm' : '0/0/0',
220 'rgba' : '0/0/0',
221 'ddpi' : null,
222 'ddpix' : null,
223 'ddpiy' : null,
224 // list of digilib parameters
225 'digilibParamNames' : ['fn','pn','ww','wh','wx','wy','ws','mo','rot','cont','brgt','rgbm','rgba','ddpi','mk','clop'],
226 // digilib parameter defaults
227 'mk' : '',
228 'clop' : '',
229 // mode of operation:
230 // fullscreen = take parameters from page URL, keep state in page URL
231 // embedded = take parameters from Javascript options, keep state inside object
232 'interactionMode' : 'fullscreen',
233 // buttons
234 'buttons' : buttons,
235 // defaults for digilib buttons
236 'buttonSettings' : {
237 'fullscreen' : {
238 // path to button images (must end with a slash)
239 'imagePath' : 'img/fullscreen/',
240 'buttonSetWidth' : 36,
241 'standardSet' : ["reference","zoomin","zoomout","zoomarea","zoomfull","pagewidth","back","fwd","page","help","reset","toggleoptions"],
242 'specialSet' : ["mark","delmark","hmir","vmir","rot","brgt","cont","rgb","quality","size","calibrationx","scale","lessoptions"],
243 'arrowSet' : ["up", "down", "left", "right"],
244 'buttonSets' : ['standardSet', 'specialSet']
245 },
246 'embedded' : {
247 'imagePath' : 'img/embedded/16/',
248 'buttonSetWidth' : 18,
249 'standardSet' : ["reference","zoomin","zoomout","zoomarea","zoomfull","help","reset","toggleoptions"],
250 'specialSet' : ["mark","delmark","hmir","vmir","rot","brgt","cont","rgb","quality","scale","lessoptions"],
251 'arrowSet' : ["up", "down", "left", "right"],
252 'buttonSets' : ['standardSet', 'specialSet']
253 },
254 },
255 // arrow bar overlays for moving the zoomed area
256 'showZoomArrows' : true,
257 // zoom arrow bar minimal width (for small images)
258 'zoomArrowMinWidth' : 6,
259 // zoom arrow bar standard width
260 'zoomArrowWidth' : 32,
261 // by what percentage should the arrows move the zoomed area?
262 'zoomArrowMoveFactor' : 0.5,
263 // number of visible button groups
264 'visibleButtonSets' : 1,
265 // is the "about" window shown?
266 'isAboutDivVisible' : false,
267 // default size of background image for drag-scroll (same as Bird's Eye View image)
268 'bgImgWidth' : 200,
269 'bgImgHeight' : 200,
270 // maximum width or height of background image for drag-scroll
271 'maxBgSize' : 10000,
272 // parameters used by background image
273 'bgImgParams' : ['fn','pn','dw','dh','mo','rot'],
274 // reserved space in full page display (default value accounts for vertical scrollbar)
275 'scalerInset' : 10
276 };
277
278 // list of plugins
279 var plugins = {};
280 // object to export functions to plugins
281 var fn;
282 // affine geometry plugin stub
283 var geom;
284
285 var FULL_AREA;
286
287 var actions = {
288 // init: digilib initialization
289 init : function(options) {
290 // import geometry classes
291 if (plugins.geometry == null) {
292 $.error("jquery.digilib.geometry plugin not found!");
293 // last straw: old version
294 geom = dlGeometry();
295 } else {
296 // geometry plugin puts classes in the shared fn
297 geom = fn.geometry;
298 }
299 FULL_AREA = geom.rectangle(0, 0, 1, 1);
300
301 // settings for this digilib instance are merged from defaults and options
302 var settings = $.extend({}, defaults, options);
303 var isFullscreen = settings.interactionMode === 'fullscreen';
304 var queryParams = {};
305 if (isFullscreen) {
306 queryParams = parseQueryParams();
307 // check scalerBaseUrl
308 if (settings.scalerBaseUrl == null) {
309 // try the host this came from
310 var h = window.location.host;
311 if (window.location.host) {
312 var url = window.location.href;
313 // assume the page lives in [webapp]/jquery/
314 var pos = url.indexOf('jquery/');
315 if (pos > 0) {
316 settings.scalerBaseUrl = url.substring(0, pos) + 'servlet/Scaler';
317 }
318 }
319 }
320 }
321 return this.each(function() {
322 var $elem = $(this);
323 var data = $elem.data('digilib');
324 var params, elemSettings;
325 // if the plugin hasn't been initialized yet
326 if (!data) {
327 // merge query parameters
328 if (isFullscreen) {
329 params = queryParams;
330 } else {
331 params = parseImgParams($elem);
332 if ($.cookie) {
333 // retrieve params from cookie
334 var ck = "digilib-embed:fn:" + escape(params.fn) + ":pn:" + (params.pn || '1');
335 var cs = $.cookie(ck);
336 console.debug("get cookie=", ck, " value=", cs);
337 if (cs) {
338 var cp = parseQueryString(cs);
339 // ignore fn and pn from cookie TODO: should we keep pn?
340 delete cp.fn;
341 delete cp.pn;
342 $.extend(params, cp);
343 }
344 }
345 }
346 // setup $elem.data, needs "deep copy" because of nesting
347 elemSettings = $.extend(true, {}, settings, params);
348 data = {
349 // let $(this) know about $(this) :-)
350 $elem : $elem,
351 // let $elem have its own copy of settings
352 settings : elemSettings,
353 // and of the URL query parameters
354 queryParams : params,
355 // TODO: move plugins reference out of data
356 plugins : plugins
357 };
358 // store in jQuery data element
359 $elem.data('digilib', data);
360 }
361 unpackParams(data);
362 // check if browser knows *background-size
363 for (var bs in {'':1, '-moz-':1, '-webkit-':1, '-o-':1}) {
364 if ($elem.css(bs+'background-size')) {
365 data.hasBgSize = true;
366 data.bgSizeName = bs+'background-size';
367 break;
368 }
369 }
370 // check digilib base URL
371 if (elemSettings.digilibBaseUrl == null) {
372 if (isFullscreen) {
373 // take current host
374 var url = window.location.toString();
375 var pos = url.indexOf('?');
376 elemSettings.digilibBaseUrl = url.substring(0, pos);
377 } else {
378 var url = elemSettings.scalerBaseUrl;
379 if (url) {
380 // build it from scaler URL
381 var bp = url.indexOf('/servlet/Scaler');
382 elemSettings.digilibBaseUrl = url.substring(0, bp) + '/digilib.jsp';
383 }
384 }
385 }
386 // initialise plugins
387 for (n in plugins) {
388 var p = plugins[n];
389 if (typeof p.init === 'function') {
390 p.init(data);
391 }
392 }
393 // get image info from server if needed
394 if (data.scaleMode === 'pixel' || data.scaleMode === 'size') {
395 $(data).bind('imageInfo', handleImageInfo);
396 loadImageInfo(data); // triggers "imageInfo" on completion
397 }
398 // create buttons before scaler
399 for (var i = 0; i < elemSettings.visibleButtonSets; ++i) {
400 showButtons(data, true, i);
401 }
402 // create HTML structure for scaler, taking width of buttons div into account
403 setupScalerDiv(data);
404 highlightButtons(data);
405 // about window creation - TODO: could be deferred? restrict to only one item?
406 setupAboutDiv(data);
407 // arrow overlays for moving zoomed detail
408 setupZoomArrows(data);
409 // send setup event
410 $(data).trigger('setup');
411 });
412 },
413
414 // destroy: clean up digilib
415 destroy : function(data) {
416 return this.each(function(){
417 var $elem = $(this);
418 $(window).unbind('.digilib'); // unbind all digilibs(?)
419 data.digilib.remove();
420 $elem.removeData('digilib');
421 });
422 },
423
424 // show or hide the 'about' window
425 showAboutDiv : function(data, show) {
426 var on = showDiv(data.settings.isAboutDivVisible, data.$aboutDiv, show);
427 data.settings.isAboutDivVisible = on;
428 highlightButtons(data, 'help', on);
429 },
430
431 // goto given page nr (+/-: relative)
432 gotoPage : function (data, pageNr) {
433 var settings = data.settings;
434 var oldpn = settings.pn;
435 if (pageNr == null) {
436 pageNr = window.prompt("Goto page number", oldpn);
437 }
438 var pn = setNumValue(settings, "pn", pageNr);
439 if (pn == null) return false; // nothing happened
440 if (pn < 1) {
441 alert("no such page (page number too low)");
442 settings.pn = oldpn;
443 return false;
444 }
445 // TODO: how do we get pt?
446 if (settings.pt) {
447 if (pn > settings.pt) {
448 alert("no such page (page number too high)");
449 settings.pn = oldpn;
450 return false;
451 }
452 }
453 // reset mk and others(?)
454 data.marks = [];
455 data.zoomArea = FULL_AREA;
456 // then reload
457 redisplay(data);
458 },
459
460 // zoom by a given factor
461 zoomBy : function (data, factor) {
462 zoomBy(data, factor);
463 },
464
465 // zoom to area (or interactive)
466 zoomArea : function (data, area) {
467 var settings = data.settings;
468 if (area == null) {
469 // interactively
470 zoomArea(data);
471 } else {
472 data.zoomArea = geom.rectangle(area);
473 redisplay(data);
474 }
475 },
476
477 // zoom out to full page
478 zoomFull : function (data, mode) {
479 data.zoomArea = FULL_AREA;
480 if (mode === 'width') {
481 data.dlOpts.fitwidth = 1;
482 delete data.dlOpts.fitheight;
483 } else if (mode === 'height') {
484 data.dlOpts.fitheight = 1;
485 delete data.dlOpts.fitwidth;
486 } else {
487 delete data.dlOpts.fitwidth;
488 delete data.dlOpts.fitheight;
489 }
490 redisplay(data);
491 },
492
493 // move zoomed area
494 moveZoomArea : function (data, dx, dy) {
495 var za = data.zoomArea;
496 var factor = data.settings.zoomArrowMoveFactor;
497 var deltaX = dx * factor * za.width;
498 var deltaY = dy * factor * za.height;
499 za.addPosition(geom.position(deltaX, deltaY));
500 data.zoomArea = FULL_AREA.fit(za);
501 redisplay(data);
502 },
503
504 // set a mark by clicking (or giving a position)
505 setMark : function (data, mpos) {
506 if (mpos == null) {
507 // interactive
508 setMark(data);
509 } else {
510 // use position
511 data.marks.push(pos);
512 redisplay(data);
513 }
514 },
515
516 // remove the last mark
517 removeMark : function (data) {
518 data.marks.pop();
519 redisplay(data);
520 },
521
522 // mirror the image
523 mirror : function (data, mode) {
524 var flags = data.scalerFlags;
525 if (mode === 'h') {
526 if (flags.hmir) {
527 delete flags.hmir;
528 } else {
529 flags.hmir = 1;
530 }
531 } else {
532 if (flags.vmir) {
533 delete flags.vmir;
534 } else {
535 flags.vmir = 1;
536 }
537 }
538 redisplay(data);
539 },
540
541 // rotate the image
542 rotate : function (data, angle) {
543 var rot = data.settings.rot;
544 if (angle == null) {
545 angle = window.prompt("Rotation angle:", rot);
546 }
547 data.settings.rot = angle;
548 redisplay(data);
549 },
550
551 // change brightness
552 brightness : function (data, factor) {
553 var brgt = data.settings.brgt;
554 if (factor == null) {
555 factor = window.prompt("Brightness (-255..255)", brgt);
556 }
557 data.settings.brgt = factor;
558 redisplay(data);
559 },
560
561 // change contrast
562 contrast : function (data, factor) {
563 var cont = data.settings.cont;
564 if (factor == null) {
565 factor = window.prompt("Contrast (-8, 8)", cont);
566 }
567 data.settings.cont = factor;
568 redisplay(data);
569 },
570
571 // display more (or less) button sets
572 moreButtons : function (data, more) {
573 var settings = data.settings;
574 if (more == null) {
575 // toggle more or less (only works for 2 sets)
576 var maxbtns = settings.buttonSettings[settings.interactionMode].buttonSets.length;
577 if (settings.visibleButtonSets >= maxbtns) {
578 more = '-1';
579 } else {
580 more = '+1';
581 }
582 }
583 if (more === '-1') {
584 // remove set
585 var setIdx = settings.visibleButtonSets - 1;
586 if (showButtons(data, false, setIdx, true)) {
587 settings.visibleButtonSets--;
588 }
589 } else {
590 // add set
591 var setIdx = settings.visibleButtonSets;
592 if (showButtons(data, true, setIdx, true)) {
593 settings.visibleButtonSets++;
594 }
595 }
596 // persist setting
597 storeOptions(data);
598 },
599
600 // reset image parameters to defaults
601 reset : function (data) {
602 var settings = data.settings;
603 var paramNames = settings.digilibParamNames;
604 var params = data.queryParams;
605 // delete all digilib parameters
606 for (var i = 0; i < paramNames.length; i++) {
607 var paramName = paramNames[i];
608 delete settings[paramName];
609 }
610 settings.fn = params.fn || ''; // no default defined
611 settings.pn = params.pn || defaults.pn;
612 settings.dw = params.dw;
613 settings.dh = params.dh;
614 settings.isBirdDivVisible = false;
615 settings.visibleButtonSets = 1;
616 // resets zoomArea, marks, scalerflags
617 data.zoomArea = FULL_AREA;
618 data.marks = [];
619 data.scalerFlags = {};
620 delete data.dlOpts.fitwidth;
621 delete data.dlOpts.fitheight;
622 redisplay(data);
623 },
624
625 // presents a reference url (returns value if noprompt)
626 reference : function (data, noprompt) {
627 var settings = data.settings;
628 var url = getDigilibUrl(data);
629 if (noprompt == null) {
630 window.prompt("URL reference to the current view", url);
631 }
632 return url;
633 },
634
635 // set image quality
636 setQuality : function (data, qual) {
637 var oldq = getQuality(data);
638 if (qual == null) {
639 qual = window.prompt("Image quality (0..2)", oldq);
640 }
641 qual = parseInt(qual, 10);
642 if (qual >= 0 && qual <= 2) {
643 setQuality(data, qual);
644 redisplay(data);
645 }
646 },
647
648 // calibrate (only faking)
649 calibrate : function (data, res) {
650 var oldRes = data.settings.ddpi;
651 if (res == null) {
652 res = window.prompt("Display resolution (dpi)", oldRes);
653 }
654 if (res != null) {
655 data.settings.ddpi = res;
656 redisplay(data);
657 }
658 },
659
660 // set image scale mode
661 setScaleMode : function (data, mode) {
662 var oldM = getScaleMode(data);
663 if (mode == null) {
664 mode = window.prompt("Image scale mode (screen, pixel, size)", oldM);
665 }
666 if (mode != null) {
667 setScaleMode(data, mode);
668 data.scaleMode = mode;
669 redisplay(data);
670 }
671 }
672
673 // end of actions
674 };
675
676 // returns parameters from page url
677 var parseQueryParams = function() {
678 return parseQueryString(window.location.search.slice(1));
679 };
680
681 // returns parameters from embedded img-element
682 var parseImgParams = function($elem) {
683 var src = $elem.find('img').first().attr('src');
684 if (!src) return null;
685 var pos = src.indexOf('?');
686 var query = (pos < 0) ? '' : src.substring(pos + 1);
687 var scalerUrl = src.substring(0, pos);
688 var params = parseQueryString(query);
689 params.scalerBaseUrl = scalerUrl;
690 return params;
691 };
692
693 // parses query parameter string into parameter object
694 var parseQueryString = function(query) {
695 var params = {};
696 if (query == null) return params;
697 var pairs = query.split("&");
698 //var keys = [];
699 for (var i = 0; i < pairs.length; i++) {
700 var pair = pairs[i].split("=");
701 if (pair.length === 2) {
702 params[pair[0]] = pair[1];
703 //keys.push(pair[0]);
704 }
705 }
706 return params;
707 };
708
709 // returns a query string from key names from a parameter hash (ignoring if the same value is in defaults)
710 var getParamString = function (settings, keys, defaults) {
711 var paramString = '';
712 var nx = false;
713 for (i = 0; i < keys.length; ++i) {
714 var key = keys[i];
715 if ((settings[key] != null) && ((defaults == null) || (settings[key] != defaults[key]))) {
716 // first param gets no '&'
717 if (nx) {
718 paramString += '&';
719 } else {
720 nx = true;
721 }
722 // add parm=val
723 paramString += key + '=' + settings[key];
724 }
725 }
726 return paramString;
727 };
728
729 // returns URL and query string for Scaler
730 var getScalerUrl = function (data) {
731 packParams(data);
732 var settings = data.settings;
733 if (settings.scalerBaseUrl == null) {
734 alert("ERROR: URL of digilib Scaler servlet missing!");
735 }
736 var keys = settings.scalerParamNames;
737 var queryString = getParamString(settings, keys, defaults);
738 var url = settings.scalerBaseUrl + '?' + queryString;
739 return url;
740 };
741
742 // returns URL for bird's eye view image
743 var getBgImgUrl = function (data, moreParams) {
744 var settings = data.settings;
745 var bgOptions = {
746 dw : settings.bgImgWidth,
747 dh : settings.bgImgHeight
748 };
749 var bgSettings = $.extend({}, settings, bgOptions);
750 // filter scaler flags
751 if (bgSettings.mo != null) {
752 var mo = '';
753 if (data.scalerFlags.hmir != null) {
754 mo += 'hmir,';
755 }
756 if (data.scalerFlags.vmir != null) {
757 mo += 'vmir';
758 }
759 bgSettings.mo = mo;
760 }
761 var params = getParamString(bgSettings, settings.bgImgParams, defaults);
762 var url = settings.scalerBaseUrl + '?' + params;
763 return url;
764 };
765
766 // returns URL and query string for current digilib
767 var getDigilibUrl = function (data) {
768 packParams(data);
769 var settings = data.settings;
770 var queryString = getParamString(settings, settings.digilibParamNames, defaults);
771 return settings.digilibBaseUrl + '?' + queryString;
772 };
773
774 // loads image information from digilib server via HTTP
775 var loadImageInfo = function (data) {
776 var settings = data.settings;
777 var p = settings.scalerBaseUrl.indexOf('/servlet/Scaler');
778 var url = settings.scalerBaseUrl.substring(0, p) + '/ImgInfo-json.jsp';
779 url += '?' + getParamString(settings, ['fn', 'pn'], defaults);
780 // TODO: better error handling
781 $.getJSON(url, function (json) {
782 console.debug("got json data=", json);
783 data.imgInfo = json;
784 // send event
785 $(data).trigger('imageInfo', [json]);
786 });
787 };
788
789 // processes some parameters into objects and stuff
790 var unpackParams = function (data) {
791 var settings = data.settings;
792 // zoom area
793 var zoomArea = geom.rectangle(settings.wx, settings.wy, settings.ww, settings.wh);
794 data.zoomArea = zoomArea;
795 // marks
796 var marks = [];
797 if (settings.mk) {
798 var mk = settings.mk;
799 if (mk.indexOf(";") >= 0) {
800 var pa = mk.split(";"); // old format with ";"
801 } else {
802 var pa = mk.split(","); // new format
803 }
804 for (var i = 0; i < pa.length ; i++) {
805 var pos = pa[i].split("/");
806 if (pos.length > 1) {
807 marks.push(geom.position(pos[0], pos[1]));
808 }
809 }
810 }
811 data.marks = marks;
812 // mo (Scaler flags)
813 var flags = {};
814 if (settings.mo) {
815 var pa = settings.mo.split(",");
816 for (var i = 0; i < pa.length ; i++) {
817 flags[pa[i]] = pa[i];
818 }
819 }
820 data.scalerFlags = flags;
821 data.scaleMode = getScaleMode(data);
822 retrieveOptions(data);
823 };
824
825 // put area into parameters
826 var packArea = function (settings, area) {
827 if (!area) return;
828 // zoom area
829 settings.wx = cropFloat(area.x);
830 settings.wy = cropFloat(area.y);
831 settings.ww = cropFloat(area.width);
832 settings.wh = cropFloat(area.height);
833 };
834
835 // put marks into parameters
836 var packMarks = function (settings, marks) {
837 if (!marks) return;
838 settings.mk = '';
839 for (var i = 0; i < marks.length; i++) {
840 if (i) {
841 settings.mk += ',';
842 }
843 settings.mk +=
844 cropFloatStr(marks[i].x) + '/' +
845 cropFloatStr(marks[i].y);
846 }
847 };
848
849 // pack scaler flags into parameters
850 var packScalerFlags = function (settings, flags) {
851 if (!flags) return;
852 var mo = '';
853 for (var f in flags) {
854 if (mo) {
855 mo += ',';
856 }
857 mo += f;
858 }
859 settings.mo = mo;
860 };
861
862 // put objects back into parameters
863 var packParams = function (data) {
864 var settings = data.settings;
865 packArea(settings, data.zoomArea);
866 packMarks(settings, data.marks);
867 packScalerFlags(settings, data.scalerFlags);
868 // store user interface options in cookie
869 storeOptions(data);
870 };
871
872 var storeOptions = function (data) {
873 // save digilib options in cookie
874 var settings = data.settings;
875 if (data.dlOpts) {
876 // save digilib settings in options
877 data.dlOpts.birdview = settings.isBirdDivVisible ? 1 : 0;
878 data.dlOpts.buttons = settings.visibleButtonSets;
879 var clop = '';
880 for (var o in data.dlOpts) {
881 if (clop) {
882 clop += '&';
883 }
884 clop += o + '=' + data.dlOpts[o];
885 }
886 if ($.cookie) {
887 var ck = "digilib:fn:" + escape(settings.fn) + ":pn:" + settings.pn;
888 console.debug("set cookie=", ck, " value=", clop);
889 $.cookie(ck, clop);
890 }
891 }
892 if (settings.interactionMode !== 'fullscreen' && $.cookie) {
893 // store normal parameters in cookie for embedded mode
894 var qs = getParamString(settings, settings.digilibParamNames, defaults);
895 var ck = "digilib-embed:fn:" + escape(settings.fn) + ":pn:" + settings.pn;
896 console.debug("set cookie=", ck, " value=", qs);
897 $.cookie(ck, qs);
898 }
899 };
900
901 var retrieveOptions = function (data) {
902 // clop (digilib options)
903 var opts = {};
904 var settings = data.settings;
905 if ($.cookie) {
906 // read from cookie
907 var ck = "digilib:fn:" + escape(settings.fn) + ":pn:" + settings.pn;
908 var cp = $.cookie(ck);
909 console.debug("get cookie=", ck, " value=", cp);
910 // in query string format
911 opts = parseQueryString(cp);
912 }
913 data.dlOpts = opts;
914 // birdview option
915 if (opts.birdview != null) {
916 settings.isBirdDivVisible = opts.birdview === '1';
917 }
918 // visible button sets
919 if (opts.buttons != null) {
920 settings.visibleButtonSets = opts.buttons;
921 }
922 };
923
924 // (re)load the img from a new scaler URL
925 var redisplay = function (data) {
926 var settings = data.settings;
927 if (settings.interactionMode === 'fullscreen') {
928 // update location.href (browser URL) in fullscreen mode
929 var url = getDigilibUrl(data);
930 var history = window.history;
931 if (typeof history.pushState === 'function') {
932 console.debug("faking reload to "+url);
933 // change url without reloading (stateObj, title, url)
934 // TODO: we really need to push the state in stateObj and listen to pop-events
935 history.replaceState({}, '', url);
936 // change img src
937 var imgurl = getScalerUrl(data);
938 data.$img.attr('src', imgurl);
939 highlightButtons(data);
940 // send event
941 $(data).trigger('redisplay');
942 } else {
943 // reload window
944 window.location = url;
945 }
946 } else {
947 // embedded mode -- just change img src
948 var url = getScalerUrl(data);
949 data.$img.attr('src', url);
950 highlightButtons(data);
951 // send event
952 $(data).trigger('redisplay');
953 }
954 };
955
956 // update display (overlays etc.)
957 var updateDisplay = function (data) {
958 updateImgTrafo(data);
959 renderMarks(data);
960 setupZoomDrag(data);
961 renderZoomArrows(data);
962 // send event
963 $(data).trigger('update');
964 };
965
966 // returns maximum size for scaler img in fullscreen mode
967 var getFullscreenImgSize = function (data) {
968 var mode = data.settings.interactionMode;
969 var $win = $(window);
970 var winH = $win.height();
971 var winW = $win.width();
972 var $body = $('body');
973 // include standard body margins and check plausibility
974 var borderW = $body.outerWidth(true) - $body.width();
975 if (borderW === 0 || borderW > 100) {
976 console.debug("fixing border width for getFullscreenImgSize!");
977 borderW = data.settings.scalerInset;
978 }
979 var borderH = $body.outerHeight(true) - $body.height();
980 if (borderH === 0 || borderH > 100) {
981 console.debug("fixing border height for getFullscreenImgSize!");
982 borderH = 5;
983 }
984 var buttonsW = 0;
985 if (data.settings.visibleButtonSets) {
986 // get button width from settings
987 buttonsW = data.settings.buttonSettings[mode].buttonSetWidth;
988 // TODO: leave space for all button sets?
989 }
990 // account for left/right border, body margins and additional requirements
991 var imgW = winW - borderW - buttonsW;
992 var imgH = winH - borderH;
993 console.debug(winW, winH, 'winW:', $win.width(), 'border:', borderW, 'buttonsW:', buttonsW, 'calc:', imgW);
994 return geom.size(imgW, imgH);
995 };
996
997 // creates HTML structure for digilib in elem
998 var setupScalerDiv = function (data) {
999 var settings = data.settings;
1000 var $elem = data.$elem;
1001 $elem.addClass('digilib');
1002 var $img;
1003 var scalerUrl;
1004 if (settings.interactionMode === 'fullscreen') {
1005 // fullscreen
1006 $elem.addClass('dl_fullscreen');
1007 var imgSize = getFullscreenImgSize(data);
1008 // fitwidth/height omits destination height/width
1009 if (data.dlOpts.fitheight == null) {
1010 settings.dw = imgSize.width;
1011 }
1012 if (data.dlOpts.fitwidth == null) {
1013 settings.dh = imgSize.height;
1014 }
1015 scalerUrl = getScalerUrl(data);
1016 $img = $('<img/>');
1017 } else {
1018 // embedded mode -- try to keep img tag
1019 $elem.addClass('dl_embedded');
1020 scalerUrl = getScalerUrl(data);
1021 $img = $elem.find('img');
1022 if ($img.length > 0) {
1023 var oldUrl = $img.attr('src');
1024 // keep img attributes from html
1025 var title = $img.attr('title');
1026 var alt = $img.attr('alt');
1027 if (oldUrl === scalerUrl) {
1028 console.debug("img detach:", $img);
1029 $img.detach();
1030 } else {
1031 $img = $('<img/>');
1032 $img.attr("title", title);
1033 $img.attr("alt", alt);
1034 }
1035 } else {
1036 $img = $('<img/>');
1037 }
1038 }
1039 // create new inner html, keeping buttons and content marked with "keep" class
1040 $elem.contents(":not(.keep)").remove();
1041 var $scaler = $('<div class="scaler"/>');
1042 // scaler should be the first child element?
1043 $elem.prepend($scaler);
1044 $scaler.append($img);
1045 $img.addClass('pic');
1046 data.$scaler = $scaler;
1047 data.$img = $img;
1048 // setup image load handler before setting the src attribute (IE bug)
1049 $img.load(scalerImgLoadedHandler(data));
1050 $img.error(function () {console.error("error loading scaler image");});
1051 $img.attr('src', scalerUrl);
1052 };
1053
1054 // creates HTML structure for a single button
1055 var createButton = function (data, $div, buttonName) {
1056 var $elem = data.$elem;
1057 var settings = data.settings;
1058 var mode = settings.interactionMode;
1059 var imagePath = settings.buttonSettings[mode].imagePath;
1060 var buttonConfig = settings.buttons[buttonName];
1061 // button properties
1062 var action = buttonConfig.onclick;
1063 var tooltip = buttonConfig.tooltip;
1064 var icon = imagePath + buttonConfig.icon;
1065 // construct the button html
1066 var $button = $('<div class="button"></div>');
1067 var $a = $('<a/>');
1068 var $img = $('<img class="button"/>');
1069 $div.append($button);
1070 $button.append($a);
1071 $a.append($img);
1072 // add attributes and bindings
1073 $button.attr('title', tooltip);
1074 $button.addClass('button-' + buttonName);
1075 $img.attr('src', icon);
1076 // create handler for the buttons
1077 $button.bind('click.digilib', (function () {
1078 // we create a new closure to capture the value of action
1079 if ($.isArray(action)) {
1080 // the handler function calls digilib with action and parameters
1081 return function (evt) {
1082 console.debug('click action=', action, ' evt=', evt);
1083 $elem.digilib.apply($elem, action);
1084 return false;
1085 };
1086 } else {
1087 // the handler function calls digilib with action
1088 return function (evt) {
1089 console.debug('click action=', action, ' evt=', evt);
1090 $elem.digilib(action);
1091 return false;
1092 };
1093 }
1094 })());
1095 };
1096
1097 // creates HTML structure for buttons in elem
1098 var createButtons = function (data, buttonSetIdx) {
1099 var $elem = data.$elem;
1100 var settings = data.settings;
1101 var mode = settings.interactionMode;
1102 var buttonSettings = settings.buttonSettings[mode];
1103 var buttonGroup = buttonSettings.buttonSets[buttonSetIdx];
1104 if (buttonGroup == null) {
1105 // no buttons here
1106 return;
1107 }
1108 // button divs are marked with class "keep"
1109 var $buttonsDiv = $('<div class="keep buttons"/>');
1110 var buttonNames = buttonSettings[buttonGroup];
1111 for (var i = 0; i < buttonNames.length; i++) {
1112 var buttonName = buttonNames[i];
1113 createButton(data, $buttonsDiv, buttonName);
1114 }
1115 // make buttons div scroll if too large for window
1116 if ($buttonsDiv.height() > $(window).height() - 10) {
1117 $buttonsDiv.css('position', 'absolute');
1118 }
1119 // buttons hidden at first
1120 $buttonsDiv.hide();
1121 $elem.append($buttonsDiv);
1122 if (data.$buttonSets == null) {
1123 // first button set
1124 data.$buttonSets = [$buttonsDiv];
1125 } else {
1126 $elem.append($buttonsDiv);
1127 data.$buttonSets[buttonSetIdx] = $buttonsDiv;
1128 }
1129 return $buttonsDiv;
1130 };
1131
1132 // creates arrow overlays for moving the zoomed area
1133 var setupZoomArrows = function (data) {
1134 var $elem = data.$elem;
1135 var settings = data.settings;
1136 var show = settings.showZoomArrows;
1137 console.log('zoom arrows:', show);
1138 if (!show) return;
1139 var mode = settings.interactionMode;
1140 var arrowNames = settings.buttonSettings[mode].arrowSet;
1141 if (arrowNames == null) return;
1142 // arrow divs are marked with class "keep"
1143 var $arrowsDiv = $('<div class="keep arrows"/>');
1144 $elem.append($arrowsDiv);
1145 // create all arrow buttons
1146 $.each(arrowNames, function(i, arrowName){
1147 createButton(data, $arrowsDiv, arrowName);
1148 });
1149 };
1150
1151 // size and show arrow overlays, called after scaler img is loaded
1152 var renderZoomArrows = function (data) {
1153 var settings = data.settings;
1154 var $arrowsDiv = data.$elem.find('div.arrows');
1155 if (isFullArea(data.zoomArea) || !settings.showZoomArrows) {
1156 $arrowsDiv.hide();
1157 return;
1158 }
1159 $arrowsDiv.show();
1160 var r = geom.rectangle(data.$scaler);
1161 // calculate arrow bar width
1162 var aw = settings.zoomArrowWidth;
1163 var minWidth = settings.zoomArrowMinWidth;
1164 // arrow bar width should not exceed 10% of scaler width/height
1165 var maxWidth = Math.min(r.width, r.height)/10;
1166 if (aw > maxWidth) {
1167 aw = maxWidth;
1168 if (aw < minWidth) {
1169 aw = minWidth;
1170 }
1171 }
1172 // vertical position of left/right image
1173 var arrowData = [{
1174 name : 'up',
1175 rect : geom.rectangle(r.x, r.y, r.width, aw),
1176 show : canMove(data, 0, -1)
1177 }, {
1178 name : 'down',
1179 rect : geom.rectangle(r.x, r.y + r.height - aw, r.width, aw),
1180 show : canMove(data, 0, 1)
1181 }, {
1182 name : 'left',
1183 rect : geom.rectangle(r.x, r.y, aw, r.height),
1184 show : canMove(data, -1, 0)
1185 }, {
1186 name : 'right',
1187 rect : geom.rectangle(r.x + r.width - aw, r.y, aw, r.height),
1188 show : canMove(data, 1, 0)
1189 }];
1190 // render a single zoom Arrow
1191 var render = function (i, item) {
1192 var $arrow = $arrowsDiv.find('div.button-' + item.name);
1193 if (item.show) {
1194 $arrow.show();
1195 } else {
1196 $arrow.hide();
1197 return;
1198 }
1199 var r = item.rect;
1200 r.adjustDiv($arrow);
1201 var $a = $arrow.contents('a');
1202 var $img = $a.contents('img');
1203 $img.width(aw).height(aw);
1204 // hack for missing vertical-align
1205 if (item.name.match(/left|right/)) {
1206 var top = (r.height - $a.height())/2;
1207 $a.css({'top' : top}); // position : 'relative'
1208 }
1209 };
1210 $.each(arrowData, render);
1211 };
1212
1213 // creates HTML structure for the about view in elem
1214 var setupAboutDiv = function (data) {
1215 var $elem = data.$elem;
1216 var settings = data.settings;
1217 var $aboutDiv = $('<div class="about" style="display:none"/>');
1218 var $header = $('<p>Digilib Image Viewer</p>');
1219 var $link = $('<a/>');
1220 var $logo = $('<img class="logo" title="digilib"/>');
1221 var $content = $('<p/>');
1222 $elem.append($aboutDiv);
1223 $aboutDiv.append($header);
1224 $aboutDiv.append($link);
1225 $aboutDiv.append($content);
1226 $link.append($logo);
1227 $logo.attr('src', settings.logoUrl);
1228 $link.attr('href', settings.homeUrl);
1229 $content.text('Version: ' + settings.version);
1230 data.$aboutDiv = $aboutDiv;
1231 // click hides
1232 $aboutDiv.bind('click.digilib', function () {
1233 actions['showAboutDiv'](data, false);
1234 });
1235 };
1236
1237 // shows some window e.g. 'about' (toggle visibility if show is null)
1238 var showDiv = function (isVisible, $div, show) {
1239 if (show == null) {
1240 // toggle visibility
1241 isVisible = !isVisible;
1242 } else {
1243 // set visibility
1244 isVisible = show;
1245 }
1246 if (isVisible) {
1247 $div.fadeIn();
1248 } else {
1249 $div.fadeOut();
1250 }
1251 return isVisible;
1252 };
1253
1254 // display more (or less) button sets
1255 var showButtons = function (data, more, setIdx, animated) {
1256 var atime = animated ? 'fast': 0;
1257 // get button width from settings
1258 var mode = data.settings.interactionMode;
1259 var btnWidth = data.settings.buttonSettings[mode].buttonSetWidth;
1260 if (more) {
1261 // add set
1262 var $otherSets = data.$elem.find('div.buttons:visible');
1263 var $set;
1264 if (data.$buttonSets && data.$buttonSets[setIdx]) {
1265 // set exists
1266 $set = data.$buttonSets[setIdx];
1267 } else {
1268 $set = createButtons(data, setIdx);
1269 }
1270 if ($set == null) return false;
1271 // include border in calculation
1272 //var btnWidth = $set.outerWidth();
1273 // console.debug("btnWidth", btnWidth);
1274 // move remaining sets left and show new set
1275 if ($otherSets.length > 0) {
1276 $otherSets.animate({right : '+='+btnWidth+'px'}, atime,
1277 function () {$set.show();});
1278 } else {
1279 $set.show();
1280 }
1281 } else {
1282 // remove set
1283 var $set = data.$buttonSets[setIdx];
1284 if ($set == null) return false;
1285 //var btnWidth = $set.outerWidth();
1286 // hide last set
1287 $set.hide();
1288 // take remaining sets and move right
1289 var $otherSets = data.$elem.find('div.buttons:visible');
1290 $otherSets.animate({right : '-='+btnWidth+'px'}, atime);
1291 }
1292 return true;
1293 };
1294
1295 // check for buttons to highlight
1296 var highlightButtons = function (data, name, on) {
1297 var $buttons = data.$elem.find('div.buttons:visible'); // include hidden?
1298 // add a class for highlighted button
1299 var highlight = function (name, on) {
1300 var $button = $buttons.find('div.button-' + name);
1301 if (on) {
1302 $button.addClass('button-on');
1303 } else {
1304 $button.removeClass('button-on');
1305 }
1306 };
1307 if (name != null) {
1308 return highlight(name, on);
1309 }
1310 var flags = data.scalerFlags;
1311 var settings = data.settings;
1312 highlight('rot', settings.rot);
1313 highlight('brgt', settings.brgt);
1314 highlight('cont', settings.cont);
1315 highlight('bird', settings.isBirdDivVisible);
1316 highlight('help', settings.isAboutDivVisible);
1317 highlight('hmir', flags.hmir);
1318 highlight('vmir', flags.vmir);
1319 highlight('quality', flags.q1 || flags.q2);
1320 highlight('zoomin', ! isFullArea(data.zoomArea));
1321 };
1322
1323 // create Transform from area and $img
1324 var getImgTrafo = function ($img, area, rot, hmir, vmir, mode, data) {
1325 var picrect = geom.rectangle($img);
1326 if (mode != null) {
1327 var imgInfo = data.imgInfo;
1328 if (mode === 'pixel') {
1329 // scaler mo=clip - image area size does not come from ww, wh
1330 if (imgInfo != null) {
1331 area.width = picrect.width / imgInfo.width;
1332 area.height = picrect.height / imgInfo.height;
1333 } else {
1334 console.error("No image info for pixel mode!");
1335 }
1336 }
1337 if (mode === 'size') {
1338 // scaler mo=osize - image area size does not come from ww, wh
1339 if (imgInfo != null) {
1340 var ddpi = parseFloat(data.settings.ddpi);
1341 area.width = (picrect.width / ddpi) / (imgInfo.width / imgInfo.dpi_x);
1342 area.height = (picrect.height / ddpi) / (imgInfo.height / imgInfo.dpi_y);
1343 } else {
1344 console.error("No image info for original size mode!");
1345 }
1346 }
1347 }
1348 var trafo = geom.transform();
1349 // move zoom area offset to center
1350 trafo.concat(trafo.getTranslation(geom.position(-area.x, -area.y)));
1351 // scale zoom area size to [1,1]
1352 trafo.concat(trafo.getScale(geom.size(1/area.width, 1/area.height)));
1353 // rotate and mirror (around transformed image center i.e. [0.5,0.5])
1354 if (rot || hmir || vmir) {
1355 // move [0.5,0.5] to center
1356 trafo.concat(trafo.getTranslation(geom.position(-0.5, -0.5)));
1357 if (hmir) {
1358 // mirror about center
1359 trafo.concat(trafo.getMirror('y'));
1360 }
1361 if (vmir) {
1362 // mirror about center
1363 trafo.concat(trafo.getMirror('x'));
1364 }
1365 if (rot) {
1366 // rotate around center
1367 trafo.concat(trafo.getRotation(parseFloat(rot)));
1368 }
1369 // move back
1370 trafo.concat(trafo.getTranslation(geom.position(0.5, 0.5)));
1371 }
1372 // scale to screen position and size
1373 trafo.concat(trafo.getScale(picrect));
1374 trafo.concat(trafo.getTranslation(picrect));
1375 return trafo;
1376 };
1377
1378 // update scaler image transform
1379 var updateImgTrafo = function (data) {
1380 var $img = data.$img;
1381 if ($img != null && $img.get(0).complete) {
1382 // create Transform from current zoomArea and image size
1383 data.imgTrafo = getImgTrafo($img, data.zoomArea,
1384 data.settings.rot, data.scalerFlags.hmir, data.scalerFlags.vmir,
1385 data.scaleMode, data);
1386 // console.debug("imgTrafo=", data.imgTrafo);
1387 }
1388 };
1389
1390 // returns handler for load event of scaler img
1391 var scalerImgLoadedHandler = function (data) {
1392 return function () {
1393 var $img = $(this);
1394 console.debug("scaler img loaded=",$img);
1395 var $scaler = data.$scaler;
1396 var imgRect = geom.rectangle($img);
1397 // adjust scaler div size
1398 imgRect.adjustDiv($scaler);
1399 // show image in case it was hidden (for example in zoomDrag)
1400 $img.css('visibility', 'visible');
1401 $scaler.css({'opacity' : '1', 'background-image' : 'none'});
1402 // update display (render marks, etc.)
1403 updateDisplay(data);
1404 };
1405 };
1406
1407 // handler for imageInfo loaded event
1408 var handleImageInfo = function (evt, json) {
1409 var data = this;
1410 updateDisplay(data);
1411 };
1412
1413 // place marks on the image
1414 var renderMarks = function (data) {
1415 if (data.$img == null || data.imgTrafo == null) return;
1416 console.debug("renderMarks: img=",data.$img," imgtrafo=",data.imgTrafo);
1417 var $elem = data.$elem;
1418 var marks = data.marks;
1419 // clear marks
1420 $elem.find('div.mark').remove();
1421 for (var i = 0; i < marks.length; i++) {
1422 var mark = marks[i];
1423 if (data.zoomArea.containsPosition(mark)) {
1424 var mpos = data.imgTrafo.transform(mark);
1425 console.debug("renderMarks: pos=",mpos);
1426 // create mark
1427 var html = '<div class="mark overlay">'+(i+1)+'</div>';
1428 var $mark = $(html);
1429 $mark.attr("id", "digilib-mark-"+(i+1));
1430 $elem.append($mark);
1431 mpos.adjustDiv($mark);
1432 }
1433 }
1434 };
1435
1436 // zooms by the given factor
1437 var zoomBy = function(data, factor) {
1438 var area = data.zoomArea;
1439 var newarea = area.copy();
1440 // scale
1441 newarea.width /= factor;
1442 newarea.height /= factor;
1443 // and recenter
1444 newarea.x -= 0.5 * (newarea.width - area.width);
1445 newarea.y -= 0.5 * (newarea.height - area.height);
1446 newarea = FULL_AREA.fit(newarea);
1447 data.zoomArea = newarea;
1448 redisplay(data);
1449 };
1450
1451 // add a mark where clicked
1452 var setMark = function (data) {
1453 var $scaler = data.$scaler;
1454 // unbind other handler
1455 $scaler.unbind(".dlZoomDrag");
1456 // start event capturing
1457 $scaler.one('mousedown.dlSetMark', function (evt) {
1458 // event handler adding a new mark
1459 console.log("setmark at=", evt);
1460 var mpos = geom.position(evt);
1461 var pos = data.imgTrafo.invtransform(mpos);
1462 data.marks.push(pos);
1463 redisplay(data);
1464 return false;
1465 });
1466 };
1467
1468 // zoom to the area around two clicked points
1469 var zoomArea = function(data) {
1470 $elem = data.$elem;
1471 $scaler = data.$scaler;
1472 var pt1, pt2;
1473 var $zoomDiv = $('<div class="zoomrect" style="display:none"/>');
1474 $elem.append($zoomDiv);
1475 // $zoomDiv.css(data.settings.zoomrectStyle);
1476 var picRect = geom.rectangle($scaler);
1477 // FIX ME: is there a way to query the border width from CSS info?
1478 // rect.x -= 2; // account for overlay borders
1479 // rect.y -= 2;
1480
1481 var zoomStart = function (evt) {
1482 pt1 = geom.position(evt);
1483 // setup and show zoom div
1484 pt1.adjustDiv($zoomDiv);
1485 $zoomDiv.width(0).height(0);
1486 $zoomDiv.show();
1487 // register events
1488 $elem.bind("mousemove.dlZoomArea", zoomMove);
1489 $elem.bind("mouseup.dlZoomArea", zoomEnd);
1490 return false;
1491 };
1492
1493 // mouse move handler
1494 var zoomMove = function (evt) {
1495 pt2 = geom.position(evt);
1496 var rect = geom.rectangle(pt1, pt2);
1497 rect.clipTo(picRect);
1498 // update zoom div
1499 rect.adjustDiv($zoomDiv);
1500 return false;
1501 };
1502
1503 // mouseup handler: end moving
1504 var zoomEnd = function (evt) {
1505 pt2 = geom.position(evt);
1506 // assume a click and continue if the area is too small
1507 var clickRect = geom.rectangle(pt1, pt2);
1508 if (clickRect.getArea() <= 5) return false;
1509 // hide zoom div
1510 $zoomDiv.remove();
1511 // unregister events
1512 $elem.unbind("mousemove.dlZoomArea", zoomMove);
1513 $elem.unbind("mouseup.dlZoomArea", zoomEnd);
1514 // clip and transform
1515 clickRect.clipTo(picRect);
1516 var area = data.imgTrafo.invtransform(clickRect);
1517 data.zoomArea = area;
1518 // zoomed is always fit
1519 data.settings.ws = 1;
1520 delete data.dlOpts.fitwidth;
1521 delete data.dlOpts.fitheight;
1522 redisplay(data);
1523 return false;
1524 };
1525
1526 // clear old handler (also ZoomDrag)
1527 $scaler.unbind('.dlZoomArea');
1528 $scaler.unbind(".dlZoomDrag");
1529 $elem.unbind('.dlZoomArea');
1530 // bind start zoom handler
1531 $scaler.one('mousedown.dlZoomArea', zoomStart);
1532 };
1533
1534 // set zoom background
1535 var setZoomBG = function(data) {
1536 var $scaler = data.$scaler;
1537 var $img = data.$img;
1538 var fullRect = null;
1539 // hide the scaler img, show background of div instead
1540 $img.css('visibility', 'hidden');
1541 var scalerCss = {
1542 'background-image' : 'url(' + $img.attr('src') + ')',
1543 'background-repeat' : 'no-repeat',
1544 'background-position' : 'left top',
1545 'opacity' : '0.5',
1546 'cursor' : 'move'
1547 };
1548 if (data.hasBgSize) {
1549 // full-size background using CSS3-background-size
1550 fullRect = data.imgTrafo.transform(FULL_AREA);
1551 if (fullRect.height < data.settings.maxBgSize && fullRect.width < data.settings.maxBgSize) {
1552 // correct offset because background is relative
1553 var scalerPos = geom.position($scaler);
1554 fullRect.addPosition(scalerPos.neg());
1555 var url = getBgImgUrl(data);
1556 scalerCss['background-image'] = 'url(' + url + ')';
1557 scalerCss[data.bgSizeName] = fullRect.width + 'px ' + fullRect.height + 'px';
1558 scalerCss['background-position'] = fullRect.x + 'px '+ fullRect.y + 'px';
1559 } else {
1560 // too big
1561 fullRect = null;
1562 }
1563 }
1564 $scaler.css(scalerCss);
1565 // isBgReady = true;
1566 return fullRect;
1567 };
1568
1569 // setup handlers for dragging the zoomed image
1570 var setupZoomDrag = function(data) {
1571 var startPos, delta, fullRect;
1572 var $document = $(document);
1573 var $data = $(data);
1574 var $elem = data.$elem;
1575 var $scaler = data.$scaler;
1576 var $img = data.$img;
1577
1578 // drag the image and load a new detail on mouse up
1579 var dragStart = function (evt) {
1580 console.debug("dragstart at=", evt);
1581 // don't start dragging if not zoomed
1582 if (isFullArea(data.zoomArea)) return false;
1583 $elem.find(".overlay").hide(); // hide all overlays (marks/regions)
1584 startPos = geom.position(evt);
1585 delta = null;
1586 // set low res background immediately on mousedown
1587 fullRect = setZoomBG(data);
1588 $document.bind("mousemove.dlZoomDrag", dragMove);
1589 $document.bind("mouseup.dlZoomDrag", dragEnd);
1590 return false;
1591 };
1592
1593 // mousemove handler: drag zoomed image
1594 var dragMove = function (evt) {
1595 var pos = geom.position(evt);
1596 delta = startPos.delta(pos);
1597 if (fullRect) {
1598 var bgPos = fullRect.getPosition().add(delta);
1599 } else {
1600 var bgPos = delta;
1601 }
1602 // move the background image to the new position
1603 $scaler.css({
1604 'background-position' : bgPos.x + "px " + bgPos.y + "px"
1605 });
1606 // send message event with current zoom position
1607 var za = geom.rectangle($img);
1608 za.addPosition(delta.neg());
1609 $data.trigger('dragZoom', [za]);
1610 //TODO: setBirdZoom(data, za);
1611 return false;
1612 };
1613
1614 // mouseup handler: reload zoomed image in new position
1615 var dragEnd = function (evt) {
1616 $scaler.css('cursor', 'auto');
1617 $document.unbind("mousemove.dlZoomDrag", dragMove);
1618 $document.unbind("mouseup.dlZoomDrag", dragEnd);
1619 if (delta == null || delta.distance() < 2) {
1620 // no movement
1621 $img.css('visibility', 'visible');
1622 $scaler.css({'opacity' : '1', 'background-image' : 'none'});
1623 // unhide marks
1624 data.$elem.find('div.mark').show();
1625 $(data).trigger('redisplay');
1626 return false;
1627 }
1628 // get old zoom area (screen coordinates)
1629 var za = geom.rectangle($img);
1630 // move
1631 za.addPosition(delta.neg());
1632 // transform back
1633 var newArea = data.imgTrafo.invtransform(za);
1634 data.zoomArea = FULL_AREA.fit(newArea);
1635 redisplay(data);
1636 return false;
1637 };
1638
1639 // clear old handler
1640 $document.unbind(".dlZoomDrag");
1641 $scaler.unbind(".dlZoomDrag");
1642 if (! isFullArea(data.zoomArea)) {
1643 // set handler
1644 $scaler.bind("mousedown.dlZoomDrag", dragStart);
1645 }
1646 };
1647
1648 // get image quality as a number (0..2)
1649 var getQuality = function (data) {
1650 var flags = data.scalerFlags;
1651 var q = flags.q2 || flags.q1 || 'q0'; // assume q0 as default
1652 return parseInt(q[1], 10);
1653 };
1654
1655 // set image quality as a number (0..2)
1656 var setQuality = function (data, qual) {
1657 var flags = data.scalerFlags;
1658 // clear flags
1659 for (var i = 0; i < 3; ++i) {
1660 delete flags['q'+i];
1661 }
1662 flags['q'+qual] = 'q'+qual;
1663 };
1664
1665 // get image scale mode (screen, pixel, size)
1666 var getScaleMode = function (data) {
1667 if (data.scalerFlags.clip != null) {
1668 return 'pixel';
1669 } else if (data.scalerFlags.osize != null) {
1670 return 'size';
1671 }
1672 // mo=fit is default
1673 return 'screen';
1674 };
1675
1676 // set image scale mode (screen, pixel, size)
1677 var setScaleMode = function (data, mode) {
1678 delete data.scalerFlags.fit;
1679 delete data.scalerFlags.clip;
1680 delete data.scalerFlags.osize;
1681 if (mode === 'pixel') {
1682 data.scalerFlags.clip = 'clip';
1683 } else if (mode === 'size') {
1684 data.scalerFlags.osize = 'osize';
1685 }
1686 // mo=fit is default
1687 };
1688
1689 // sets a key to a value (relative values with +/- if relative=true)
1690 var setNumValue = function(settings, key, value) {
1691 if (value == null) return null;
1692 if (isNumber(value)) {
1693 settings[key] = value;
1694 return value;
1695 }
1696 var sign = value[0];
1697 if (sign === '+' || sign === '-') {
1698 if (settings[key] == null) {
1699 // this isn't perfect but still...
1700 settings[key] = 0;
1701 }
1702 settings[key] = parseFloat(settings[key]) + parseFloat(value);
1703 } else {
1704 settings[key] = value;
1705 }
1706 return settings[key];
1707 };
1708
1709 // auxiliary function, assuming equal border width on all sides
1710 var getBorderWidth = function($elem) {
1711 var border = $elem.outerWidth() - $elem.width();
1712 return border/2;
1713 };
1714
1715 // auxiliary function, can the current zoomarea be moved further?
1716 var canMove = function(data, movx, movy) {
1717 var za = data.zoomArea;
1718 if (isFullArea(za)) return false;
1719 var x2 = za.x + za.width;
1720 var y2 = za.y + za.height;
1721 return ((movx < 0) && (za.x > 0))
1722 || ((movx > 0) && (x2 < 1.0))
1723 || ((movy < 0) && (za.y > 0))
1724 || ((movy > 0) && (y2 < 1.0))
1725 };
1726
1727 // auxiliary function (from old dllib.js)
1728 var isFullArea = function (area) {
1729 return (area.width === 1.0) && (area.height === 1.0);
1730 };
1731
1732 // auxiliary function (from Douglas Crockford, A.10)
1733 var isNumber = function (value) {
1734 return typeof value === 'number' && isFinite(value);
1735 };
1736
1737 // auxiliary function to crop senseless precision
1738 var cropFloat = function (x) {
1739 return parseInt(10000 * x, 10) / 10000;
1740 };
1741
1742 // idem, string version
1743 var cropFloatStr = function (x) {
1744 return cropFloat(x).toString();
1745 };
1746
1747 // fallback for console.log calls
1748 if (customConsole) {
1749 var logFunction = function(type) {
1750 return function(){
1751 var $debug = $('#debug'); // debug div
1752 if (!$debug) return;
1753 var args = Array.prototype.slice.call(arguments);
1754 var argtext = args.join(' ');
1755 var $logDiv = $('<div/>');
1756 $logDiv.addClass(type);
1757 $logDiv.text(argtext);
1758 $debug.append($logDiv);
1759 };
1760 };
1761 console.log = logFunction('_log');
1762 console.debug = logFunction('_debug');
1763 console.error = logFunction('_error');
1764 }
1765
1766 // functions to export to plugins
1767 fn = {
1768 geometry : geom,
1769 parseQueryString : parseQueryString,
1770 getScalerUrl : getScalerUrl,
1771 getParamString : getParamString,
1772 getDigilibUrl : getDigilibUrl,
1773 unpackParams : unpackParams,
1774 packParams : packParams,
1775 packArea : packArea,
1776 packMarks : packMarks,
1777 packScalerFlags : packScalerFlags,
1778 storeOptions : storeOptions,
1779 redisplay : redisplay,
1780 updateDisplay : updateDisplay,
1781 highlightButtons : highlightButtons,
1782 showDiv : showDiv,
1783 setZoomBG : setZoomBG,
1784 getImgTrafo : getImgTrafo,
1785 getQuality : getQuality,
1786 setQuality : setQuality,
1787 getScaleMode : getScaleMode,
1788 setScaleMode : setScaleMode,
1789 canMove : canMove,
1790 isFullArea : isFullArea,
1791 isNumber : isNumber,
1792 getBorderWidth : getBorderWidth,
1793 cropFloat : cropFloat,
1794 cropFloatStr : cropFloatStr
1795 };
1796
1797 // hook digilib plugin into jquery
1798 $.fn.digilib = function (action) {
1799 // plugin extension mechanism, called when the plugins' code is read
1800 if (action === 'plugin') {
1801 var plugin = arguments[1];
1802 // each plugin needs a name
1803 if (plugin.name != null) {
1804 plugins[plugin.name] = plugin;
1805 // share common objects
1806 plugin.defaults = defaults;
1807 plugin.buttons = buttons;
1808 plugin.actions = actions;
1809 plugin.fn = fn;
1810 plugin.plugins = plugins;
1811 // and install
1812 if (typeof plugin.install === 'function') {
1813 plugin.install(plugin);
1814 }
1815 }
1816 // plugins will be initialised when action.init is called
1817 } else if (actions[action]) {
1818 // call action on this with the remaining arguments (inserting data as first argument)
1819 var $elem = $(this);
1820 var data = $elem.data('digilib');
1821 var args = Array.prototype.slice.call(arguments, 1);
1822 args.unshift(data);
1823 return actions[action].apply(this, args);
1824 } else if (typeof action === 'object' || !action) {
1825 // call init on the digilib jQuery object
1826 return actions.init.apply(this, arguments);
1827 } else {
1828 $.error('action ' + action + ' does not exist on jQuery.digilib');
1829 }
1830 };
1831
1832 })(jQuery);