Annotation of zogiLib/js/dl_lib.js, revision 1.2
1.1 casties 1: /* Copyright (C) 2003,2004 WTWG Uni Bern and others
2:
3: This program is free software; you can redistribute it and/or
4: modify it under the terms of the GNU General Public License
5: as published by the Free Software Foundation; either version 2
6: of the License, or (at your option) any later version.
7:
8: This program is distributed in the hope that it will be useful,
9: but WITHOUT ANY WARRANTY; without even the implied warranty of
10: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11: GNU General Public License for more details.
12:
13: You should have received a copy of the GNU General Public License
14: along with this program; if not, write to the Free Software
15: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
16:
17: Authors: ROC 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:
22:
23: /*
24: * parameter handling
25: */
26:
27: var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
28: var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0);
29:
30: function parseArea() {
31: // returns area Rectangle from current parameters
32: return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh"));
33: }
34:
35: function setParamFromArea(rect) {
36: // sets digilib wx etc. from rect
37: setParameter("wx", cropFloat(rect.x));
38: setParameter("wy", cropFloat(rect.y));
39: setParameter("ww", cropFloat(rect.width));
40: setParameter("wh", cropFloat(rect.height));
41: return true;
42: }
43:
44: var dlTrafo = new Transform();
45:
1.2 ! casties 46: function parseTrafo(elem) {
1.1 casties 47: // returns Transform from current dlArea and picsize
1.2 ! casties 48: var picsize = getElementRect(elem);
1.1 casties 49: var trafo = new Transform();
50: // subtract area offset and size
51: trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y)));
52: trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height)));
53: // scale to screen size
54: trafo.concat(getScale(picsize));
55: trafo.concat(getTranslation(picsize));
56: // rotate
57: //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height)));
58: // mirror
59: //if (hasFlag("hmir")) {
60: //trafo.m00 = - trafo.m00;
61: //}
62: //if (hasFlag("vmir")) {
63: //trafo.m11 = - trafo.m11;
64: //}
65: return trafo;
66: }
67:
68:
69: var dlMarks = new Array();
70:
71: function parseMarks() {
72: // returns marks array from current parameters
73: var marks = new Array();
1.2 ! casties 74: var ma;
! 75: var mk = getParameter("mk");
! 76: if (mk.indexOf(";") >= 0) {
! 77: // old format with ";"
! 78: ma = mk.split(";");
! 79: } else {
! 80: ma = mk.split(",");
! 81: }
1.1 casties 82: for (var i = 0; i < ma.length ; i++) {
83: var pos = ma[i].split("/");
84: if (pos.length > 1) {
85: marks.push(new Position(pos[0], pos[1]));
86: }
87: }
88: return marks;
89: }
90:
91: function getAllMarks() {
92: // returns a string with all marks in query format
93: var marks = new Array();
94: for (var i = 0; i < dlMarks.length; i++) {
95: marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y));
96: }
1.2 ! casties 97: return marks.join(",");
1.1 casties 98: }
99:
100: function addMark(pos) {
101: // add a mark
102: dlMarks.push(pos);
103: setParameter("mk", getAllMarks());
104: return true;
105: }
106:
107: function deleteMark() {
108: // delete the last mark
109: dlMarks.pop();
110: setParameter("mk", getAllMarks());
111: return true;
112: }
113:
114: var dlFlags = new Object();
115:
116: function hasFlag(mode) {
117: // returns if mode flag is set
118: return (dlFlags[mode]);
119: }
120:
121: function addFlag(mode) {
122: // add a mode flag
123: dlFlags[mode] = mode;
124: return true;
125: }
126:
127: function removeFlag(mode) {
128: // remove a mode flag
129: if (dlFlags[mode]) {
130: delete dlFlags[mode];
131: }
132: return true;
133: }
134:
135: function toggleFlag(mode) {
136: // change a mode flag
137: if (dlFlags[mode]) {
138: delete dlFlags[mode];
139: } else {
140: dlFlags[mode] = mode;
141: }
142: return true;
143: }
144:
145: function getAllFlags() {
146: // returns a string with all flags in query format
147: var fa = new Array();
148: for (var f in dlFlags) {
149: if ((f != "")&&(dlFlags[f] != null)) {
150: fa.push(f);
151: }
152: }
153: return fa.join(",");
154: }
155:
156: function parseFlags() {
157: // sets dlFlags from the current parameters
158: var flags = new Object();
159: var fa = getParameter("mo").split(",");
160: for (var i = 0; i < fa.length ; i++) {
161: var f = fa[i];
162: if (f != "") {
163: flags[f] = f;
164: }
165: }
166: return flags;
167: }
168:
169:
1.2 ! casties 170: function bestPicSize(elem, inset) {
! 171: // returns a Size with the best image size for the given element
! 172: if (! defined(inset)) {
! 173: inset = 25;
! 174: }
1.1 casties 175: var ws = getWinSize();
1.2 ! casties 176: var es = getElementPosition(elem);
1.1 casties 177: if (es) {
178: ws.width = ws.width - es.x - inset;
179: ws.height = ws.height - es.y - inset;
180: }
181: return ws;
182: }
183:
184:
185: /* **********************************************
186: * digilib specific routines
187: * ******************************************** */
188:
1.2 ! casties 189: var elemScaler = null;
! 190: var picElem = null;
! 191:
! 192: function dl_init() {
! 193: elemScaler = getElement("scaler");
! 194: if (! elemScaler) {
1.1 casties 195: return false;
196: }
1.2 ! casties 197: picElem = getElement("pic", true);
! 198: if (picElem == null) {
! 199: // in N4 pic is in the layer scaler
! 200: picElem = elemScaler.document.images[0];
! 201: }
! 202: // give a name to the window containing digilib
1.1 casties 203: top.window.name = "digilib";
1.2 ! casties 204: // put the query parameters (sans "?") in the parameters array
1.1 casties 205: parseParameters(location.search.slice(1));
206: // treat special parameters
207: dlMarks = parseMarks();
208: dlArea = parseArea();
209: dlFlags = parseFlags();
1.2 ! casties 210: // wait for image to load and display marks
1.1 casties 211: renderMarks();
1.2 ! casties 212: // done
1.1 casties 213: focus();
214: return null;
215: }
216:
217: function display(detail) {
218: // redisplay the page
1.2 ! casties 219: if (! detail) {
! 220: detail = 9;
! 221: }
1.1 casties 222: var queryString = getAllParameters(detail);
223: location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString;
224: }
225:
1.2 ! casties 226: function openWin(url, title, params) {
! 227: // open browser window
! 228: var ow = window.open(url, title, params);
! 229: ow.focus();
! 230: }
1.1 casties 231:
232: /* **********************************************
233: * interactive digilib functions
234: * ******************************************** */
235:
1.2 ! casties 236: function getRef(select) {
1.1 casties 237: // open a dialog with a reference to the current digilib set
238: var hyperlinkRef = baseUrl + "?" + getAllParameters(9);
239: if ( select == 0 ) {
240: prompt("Link for LaTeX-documents", "\\href{" + hyperlinkRef + "}{TEXT}");
241: } else if ( select == 1 ) {
242: prompt("Link for HTML-documents", hyperlinkRef);
243: }
244: }
245:
246: function renderMarks() {
247: // put the visible marks on the image
248: var mark_count = dlMarks.length;
249: // make shure the image is loaded so we know its size
1.2 ! casties 250: if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) {
! 251: setTimeout("renderMarks()", 100);
1.1 casties 252: } else {
1.2 ! casties 253: //alert("rendermarks!");
! 254: dlTrafo = parseTrafo(picElem);
1.1 casties 255: for (var i = 0; i < 8; i++) {
1.2 ! casties 256: var me = getElement("dot"+i);
1.1 casties 257: if (i < mark_count) {
258: if (dlArea.containsPosition(dlMarks[i])) {
259: var mpos = dlTrafo.transform(dlMarks[i]);
260: // suboptimal to place -5 pixels and not half size of mark-image
261: mpos.x = mpos.x -5;
262: mpos.y = mpos.y -5;
1.2 ! casties 263: moveElement(me, mpos);
! 264: showElement(me, true);
1.1 casties 265: }
266: } else {
267: // hide the other marks
1.2 ! casties 268: showElement(me, false);
1.1 casties 269: }
270: }
271: }
272: }
273:
1.2 ! casties 274: function setMark() {
1.1 casties 275: // add a mark where clicked
276: if ( dlMarks.length > 7 ) {
277: alert("Only 8 marks are possible at the moment!");
278: return;
279: }
280:
281: function markEvent(evt) {
282: // event handler adding a new mark
283: var p = dlTrafo.invtransform(evtPosition(evt));
1.2 ! casties 284: unregisterMouseDown(elemScaler, markEvent);
1.1 casties 285: addMark(p);
1.2 ! casties 286: display();
1.1 casties 287: }
288:
289: // starting event capture
1.2 ! casties 290: registerMouseDown(elemScaler, markEvent);
1.1 casties 291: }
292:
293: var ZOOMFACTOR = Math.sqrt(2);
294:
295: function zoomPoint(inout) {
296: // zoom image in or out around the clicked point
297: var zoom = ZOOMFACTOR;
298: if (inout < 0) {
299: zoom = 1/ZOOMFACTOR;
300: }
301: window.focus();
302:
303: function zoomPointEvent(evt) {
304: // take new center and set zoom parameters
305: var p = dlTrafo.invtransform(evtPosition(evt));
306: var neww = Math.min(dlArea.width * (1/zoom), 1.0);
307: var newh = Math.min(dlArea.height * (1/zoom), 1.0);
308: var newx = p.x - 0.5 * neww;
309: var newy = p.y - 0.5 * newh;
310: var zoomarea = new Rectangle(newx, newy, neww, newh);
311: // check bounds
312: zoomarea = dlMaxArea.fit(zoomarea);
313: // set parameters
314: setParamFromArea(zoomarea);
315: parseArea();
1.2 ! casties 316: // zoomed is always fit
! 317: setParameter("ws", 1);
! 318: display();
1.1 casties 319: }
320:
321: // starting event capture
1.2 ! casties 322: registerMouseDown(elemScaler, zoomPointEvent);
1.1 casties 323: }
324:
325:
326: function zoomArea() {
327: var click = 1;
328: var pt1, pt2;
329: var eck1pos, eck2pos, eck3pos, eck4pos;
330: window.focus();
1.2 ! casties 331: var eck1 = getElement("eck1");
! 332: var eck2 = getElement("eck2");
! 333: var eck3 = getElement("eck3");
! 334: var eck4 = getElement("eck4");
1.1 casties 335:
336: function zoomClick(evt) {
337: // mouse click handler
338: if (click == 1) {
339: // first click -- start moving
340: click = 2;
341: pt1 = evtPosition(evt);
342: pt2 = pt1;
343: eck1pos = pt1;
344: eck2pos = new Position(pt1.x - 12, pt1.y);
345: eck3pos = new Position(pt1.x, pt1.y - 12);
346: eck4pos = new Position(pt1.y - 12, pt1.y - 12);
1.2 ! casties 347: moveElement(eck1, eck1pos);
! 348: moveElement(eck2, eck2pos);
! 349: moveElement(eck3, eck3pos);
! 350: moveElement(eck4, eck4pos);
! 351: showElement(eck1, true);
! 352: showElement(eck2, true);
! 353: showElement(eck3, true);
! 354: showElement(eck4, true);
! 355: registerMouseMove(elemScaler, zoomMove);
! 356: registerMouseMove(eck4, zoomMove);
1.1 casties 357: } else {
358: // second click -- end moving
359: pt2 = evtPosition(evt);
1.2 ! casties 360: showElement(eck1, false);
! 361: showElement(eck2, false);
! 362: showElement(eck3, false);
! 363: showElement(eck4, false);
! 364: unregisterMouseMove(elemScaler, zoomMove);
! 365: unregisterMouseMove(eck4, zoomMove);
! 366: unregisterMouseDown(elemScaler, zoomClick);
! 367: unregisterMouseDown(eck4, zoomClick);
1.1 casties 368: var p1 = dlTrafo.invtransform(pt1);
369: var p2 = dlTrafo.invtransform(pt2);
370: var ww = p2.x-p1.x;
371: var wh = p2.y-p1.y;
372: if ((ww > 0)&&(wh > 0)) {
373: setParameter("wx", cropFloat(p1.x));
374: setParameter("wy", cropFloat(p1.y));
375: setParameter("ww", cropFloat(ww));
376: setParameter("wh", cropFloat(wh));
377: parseArea();
1.2 ! casties 378: // zoomed is always fit
! 379: setParameter("ws", 1);
! 380: display();
1.1 casties 381: }
382: }
383: }
384:
385: function zoomMove(evt) {
386: // mouse move handler
387: pt2 = evtPosition(evt);
388: // restrict marks to move right and down
389: eck1pos = pt1;
390: eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y);
391: eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12);
392: eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12);
1.2 ! casties 393: moveElement(eck1, eck1pos);
! 394: moveElement(eck2, eck2pos);
! 395: moveElement(eck3, eck3pos);
! 396: moveElement(eck4, eck4pos);
1.1 casties 397: }
398:
399: // starting event capture
1.2 ! casties 400: registerMouseDown(elemScaler, zoomClick);
! 401: registerMouseDown(eck4, zoomClick);
1.1 casties 402: }
403:
404:
405: function moveTo() {
406:
407: if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) {
408: alert("This function is only available when zoomed in!");
409: return;
410: }
411:
412: function moveToEvent(event) {
413: // move to handler
414: var pt = evtPosition(evt);
415: var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height);
416: newarea = dlMaxArea.fit(newarea);
417: // stopping event capture
1.2 ! casties 418: unregisterMouseDown(elemScaler, moveToEvent);
1.1 casties 419: // set parameters
420: setParameter("wx", cropFloat(newarea.x));
421: setParameter("wy", cropFloat(newarea.y));
422: setParameter("ww", cropFloat(newarea.width));
423: setParameter("wh", cropFloat(newarea.height));
1.2 ! casties 424: display();
1.1 casties 425: }
426:
427: // starting event capture
1.2 ! casties 428: registerMouseDown(elemScaler, moveToEvent);
1.1 casties 429: }
430:
431:
1.2 ! casties 432: // debuggin'
! 433: function showcoordsN4() {
! 434: var s = "";
! 435: for (var l in document.layers) {
! 436: if (l == "length") continue;
! 437: e = document.layers[l];
! 438: if (e) {
! 439: s += " [" + e.name + "]: pageX:" + e.pageX + " pageY:" + e.pageY + " width:" + e.clip.width + " height:" + e.clip.height + " visibility:" + e.visibility + " zindex:" + e.zIndex + "<br>\n";
! 440: } else {
! 441: s += " {" + l + "}<br>\n";
1.1 casties 442: }
443: }
1.2 ! casties 444: return s;
! 445: }
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