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comparison client/digitallibrary/dllib.js @ 237:786c27786281

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new javascript code for digilib
author robcast
date Tue, 20 Jul 2004 09:57:24 +0200
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children 1ccda61967b2
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236:35deb0f14913 237:786c27786281
1 /* Copyright (C) 2003,2004 WTWG Uni Bern and others
2
3 This program is free software; you can redistribute it and/or
4 modify it under the terms of the GNU General Public License
5 as published by the Free Software Foundation; either version 2
6 of the License, or (at your option) any later version.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
16
17 Authors: ROC 3.5.2004
18 first version by Christian Luginbuehl, 01.05.2003
19 Changed for digiLib in Zope by DW 24.03.2004
20
21 Requires baselib.js !
22
23 */
24
25 var dlScriptVersion = "0.9a1";
26
27 /*
28 * more parameter handling
29 */
30
31 var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
32 var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
33
34 function parseArea() {
35 // returns area Rectangle from current parameters
36 return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh"));
37 }
38
39 function setParamFromArea(rect) {
40 // sets digilib wx etc. from rect
41 setParameter("wx", cropFloat(rect.x));
42 setParameter("wy", cropFloat(rect.y));
43 setParameter("ww", cropFloat(rect.width));
44 setParameter("wh", cropFloat(rect.height));
45 return true;
46 }
47
48 var dlTrafo = new Transform();
49
50 function parseTrafo(elem) {
51 // returns Transform from current dlArea and picsize
52 var picsize = getElementRect(elem);
53 var trafo = new Transform();
54 // subtract area offset and size
55 trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
56 trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
57 // scale to screen size
58 trafo.concat(getScale(picsize));
59 trafo.concat(getTranslation(picsize));
60 // rotate
61 //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height)));
62 // mirror
63 //if (hasFlag("hmir")) {
64 //trafo.m00 = - trafo.m00;
65 //}
66 //if (hasFlag("vmir")) {
67 //trafo.m11 = - trafo.m11;
68 //}
69 return trafo;
70 }
71
72
73 var dlMarks = new Array();
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) {
81 // old format with ";"
82 ma = mk.split(";");
83 } else {
84 ma = mk.split(",");
85 }
86 for (var i = 0; i < ma.length ; i++) {
87 var pos = ma[i].split("/");
88 if (pos.length > 1) {
89 marks.push(new Position(pos[0], pos[1]));
90 }
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++) {
99 marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y));
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 var dlFlags = new Object();
119
120 function hasFlag(mode) {
121 // returns if mode flag is set
122 return (dlFlags[mode]);
123 }
124
125 function addFlag(mode) {
126 // add a mode flag
127 dlFlags[mode] = mode;
128 return true;
129 }
130
131 function removeFlag(mode) {
132 // remove a mode flag
133 if (dlFlags[mode]) {
134 delete dlFlags[mode];
135 }
136 return true;
137 }
138
139 function toggleFlag(mode) {
140 // change a mode flag
141 if (dlFlags[mode]) {
142 delete dlFlags[mode];
143 } else {
144 dlFlags[mode] = mode;
145 }
146 return true;
147 }
148
149 function getAllFlags() {
150 // returns a string with all flags in query format
151 var fa = new Array();
152 for (var f in dlFlags) {
153 if ((f != "")&&(dlFlags[f] != null)) {
154 fa.push(f);
155 }
156 }
157 return fa.join(",");
158 }
159
160 function parseFlags() {
161 // sets dlFlags from the current parameters
162 var flags = new Object();
163 var fa = getParameter("mo").split(",");
164 for (var i = 0; i < fa.length ; i++) {
165 var f = fa[i];
166 if (f != "") {
167 flags[f] = f;
168 }
169 }
170 return flags;
171 }
172
173
174 function bestPicSize(elem, inset) {
175 // returns a Size with the best image size for the given element
176 if (! defined(inset)) {
177 inset = 25;
178 }
179 var ws = getWinSize();
180 var es = getElementPosition(elem);
181 if (es) {
182 ws.width = ws.width - es.x - inset;
183 ws.height = ws.height - es.y - inset;
184 }
185 return ws;
186 }
187
188
189 /* **********************************************
190 * digilib specific routines
191 * ******************************************** */
192
193 var elemScaler = null;
194 var picElem = null;
195
196 function dl_init() {
197 elemScaler = getElement("scaler", true);
198 picElem = getElement("pic", true);
199 if (picElem == null && elemScaler) {
200 // in N4 pic is in the scaler layer
201 picElem = elemScaler.document.images[0];
202 }
203 if ((!elemScaler)||(!picElem)) {
204 alert("Sorry, zogilib doesn't work here!");
205 return false;
206 }
207 // give a name to the window containing digilib
208 if (defined(dlTarget)&&(dlTarget)) {
209 window.name = dlTarget;
210 } else {
211 window.name = "digilib";
212 }
213 // put the query parameters (sans "?") in the parameters array
214 parseParameters(location.search.slice(1));
215 // treat special parameters
216 dlMarks = parseMarks();
217 dlArea = parseArea();
218 dlFlags = parseFlags();
219 // wait for image to load and display marks
220 renderMarks();
221 // done
222 focus();
223 return;
224 }
225
226
227 function display(detail) {
228 // redisplay the page
229 if (! detail) {
230 detail = 9;
231 }
232 var queryString = getAllParameters(detail);
233 location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
234 }
235
236
237 /* **********************************************
238 * interactive digilib functions
239 * ******************************************** */
240
241
242 function renderMarks() {
243 // put the visible marks on the image
244 var mark_count = dlMarks.length;
245 // make shure the image is loaded so we know its size
246 if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) {
247 setTimeout("renderMarks()", 100);
248 } else {
249 dlTrafo = parseTrafo(picElem);
250 for (var i = 0; i < 8; i++) {
251 var me = getElement("dot"+i);
252 if (i < mark_count) {
253 if (dlArea.containsPosition(dlMarks[i])) {
254 var mpos = dlTrafo.transform(dlMarks[i]);
255 // suboptimal to place -5 pixels and not half size of mark-image
256 mpos.x = mpos.x -5;
257 mpos.y = mpos.y -5;
258 moveElement(me, mpos);
259 showElement(me, true);
260 }
261 } else {
262 // hide the other marks
263 showElement(me, false);
264 }
265 }
266 }
267 }
268
269
270 function setMark() {
271 // add a mark where clicked
272 if ( dlMarks.length > 7 ) {
273 alert("Only 8 marks are possible at the moment!");
274 return;
275 }
276
277 function markEvent(evt) {
278 // event handler adding a new mark
279 unregisterMouseDown(elemScaler, markEvent);
280 var p = dlTrafo.invtransform(evtPosition(evt));
281 addMark(p);
282 display();
283 }
284
285 // starting event capture
286 registerMouseDown(elemScaler, markEvent);
287 }
288
289
290 function zoomArea() {
291 var click = 1;
292 var pt1, pt2;
293 var eck1pos, eck2pos, eck3pos, eck4pos;
294 window.focus();
295 var eck1 = getElement("eck1");
296 var eck2 = getElement("eck2");
297 var eck3 = getElement("eck3");
298 var eck4 = getElement("eck4");
299
300 function zoomClick(evt) {
301 // mouse click handler
302 if (click == 1) {
303 // first click -- start moving
304 click = 2;
305 pt1 = evtPosition(evt);
306 pt2 = pt1;
307 eck1pos = pt1;
308 eck2pos = new Position(pt1.x - 12, pt1.y);
309 eck3pos = new Position(pt1.x, pt1.y - 12);
310 eck4pos = new Position(pt1.y - 12, pt1.y - 12);
311 moveElement(eck1, eck1pos);
312 moveElement(eck2, eck2pos);
313 moveElement(eck3, eck3pos);
314 moveElement(eck4, eck4pos);
315 showElement(eck1, true);
316 showElement(eck2, true);
317 showElement(eck3, true);
318 showElement(eck4, true);
319 registerMouseMove(elemScaler, zoomMove);
320 registerMouseMove(eck4, zoomMove);
321 } else {
322 // second click -- end moving
323 pt2 = evtPosition(evt);
324 showElement(eck1, false);
325 showElement(eck2, false);
326 showElement(eck3, false);
327 showElement(eck4, false);
328 unregisterMouseMove(elemScaler, zoomMove);
329 unregisterMouseMove(eck4, zoomMove);
330 unregisterMouseDown(elemScaler, zoomClick);
331 unregisterMouseDown(eck4, zoomClick);
332 var p1 = dlTrafo.invtransform(pt1);
333 var p2 = dlTrafo.invtransform(pt2);
334 var ww = p2.x-p1.x;
335 var wh = p2.y-p1.y;
336 if ((ww > 0)&&(wh > 0)) {
337 setParameter("wx", cropFloat(p1.x));
338 setParameter("wy", cropFloat(p1.y));
339 setParameter("ww", cropFloat(ww));
340 setParameter("wh", cropFloat(wh));
341 parseArea();
342 // zoomed is always fit
343 setParameter("ws", 1);
344 display();
345 }
346 }
347 }
348
349 function zoomMove(evt) {
350 // mouse move handler
351 pt2 = evtPosition(evt);
352 // restrict marks to move right and down
353 eck1pos = pt1;
354 eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y);
355 eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12);
356 eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12);
357 moveElement(eck1, eck1pos);
358 moveElement(eck2, eck2pos);
359 moveElement(eck3, eck3pos);
360 moveElement(eck4, eck4pos);
361 }
362
363 // starting event capture
364 registerMouseDown(elemScaler, zoomClick);
365 registerMouseDown(eck4, zoomClick);
366 }
367
368 var ZOOMFACTOR = Math.sqrt(2);
369
370 function zoomBy(factor) {
371 // zooms by the given factor
372 var newarea = dlArea;
373 newarea.width /= factor;
374 newarea.height /= factor;
375 newarea.x -= 0.5 * (newarea.width - dlArea.width);
376 newarea.y -= 0.5 * (newarea.height - dlArea.height);
377 newarea = dlMaxArea.fit(newarea);
378 setParamFromArea(newarea);
379 display();
380 }
381
382
383 function zoomFullpage() {
384 // zooms out to show the whole image
385 setParameter("wx", 0.0);
386 setParameter("wy", 0.0);
387 setParameter("ww", 1.0);
388 setParameter("wh", 1.0);
389 display();
390 }
391
392
393 function moveCenter() {
394 // move visible area so that it's centered around the clicked point
395 if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) {
396 // noting to do
397 return;
398 }
399 window.focus();
400
401 function moveCenterEvent(evt) {
402 // move to handler
403 unregisterMouseDown(elemScaler, moveCenterEvent);
404 var pt = dlTrafo.invtransform(evtPosition(evt));
405 var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height);
406 newarea = dlMaxArea.fit(newarea);
407 // set parameters
408 setParamFromArea(newarea);
409 parseArea();
410 display();
411 }
412
413 // starting event capture
414 registerMouseDown(elemScaler, moveCenterEvent);
415 }
416
417
418 function removeMark() {
419 // remove the last mark
420 deleteMark();
421 renderMarks();
422 }
423
424
425 function getRef(select) {
426 // returns a reference to the current digilib set
427 if (! baseUrl) {
428 var baseUrl = location.protocol + "//" + location.host + location.pathname;
429 }
430 var hyperlinkRef = baseUrl;
431 var par = getAllParameters(9);
432 if (par.length > 0) {
433 hyperlinkRef += "?" + par;
434 }
435 return hyperlinkRef;
436 }