Mercurial > hg > digilib-old
annotate client/digitallibrary/dllib.js @ 354:7958035abec1
Servlet version 1.5.9d
- fixed a bug reading metadata
| author | robcast |
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| date | Wed, 12 Oct 2005 19:09:41 +0200 |
| parents | d14782908c37 |
| children | 3b710e39823b |
| rev | line source |
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1 /* Copyright (C) 2003,2004 IT-Group MPIWG, WTWG Uni Bern and others |
| 237 | 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 | |
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17 Authors: |
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18 Christian Luginbuehl, 01.05.2003 (first version) |
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19 DW 24.03.2004 (Changed for digiLib in Zope) |
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20 Robert Casties, 2.11.2004 |
| 237 | 21 |
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22 ! Requires baselib.js ! |
| 237 | 23 |
| 24 */ | |
| 25 | |
| 317 | 26 |
| 27 function identify() { | |
| 28 // used for identifying a digilib instance | |
| 29 // Relato uses that function - lugi | |
| 30 return "Digilib 0.6"; | |
| 31 } | |
| 32 | |
| 237 | 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) { | |
| 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 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; | |
| 239 | 126 setParameter("mo", getAllFlags()); |
| 237 | 127 return true; |
| 128 } | |
| 129 | |
| 130 function removeFlag(mode) { | |
| 131 // remove a mode flag | |
| 132 if (dlFlags[mode]) { | |
| 133 delete dlFlags[mode]; | |
| 134 } | |
| 239 | 135 setParameter("mo", getAllFlags()); |
| 237 | 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 } | |
| 239 | 146 setParameter("mo", getAllFlags()); |
| 237 | 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) { | |
| 154 if ((f != "")&&(dlFlags[f] != null)) { | |
| 155 fa.push(f); | |
| 156 } | |
| 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++) { | |
| 166 var f = fa[i]; | |
| 167 if (f != "") { | |
| 168 flags[f] = f; | |
| 169 } | |
| 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)) { | |
| 178 inset = 25; | |
| 179 } | |
| 180 var ws = getWinSize(); | |
| 181 var es = getElementPosition(elem); | |
| 182 if (es) { | |
| 183 ws.width = ws.width - es.x - inset; | |
| 184 ws.height = ws.height - es.y - inset; | |
| 185 } | |
| 186 return ws; | |
| 187 } | |
| 188 | |
| 189 | |
| 190 /* ********************************************** | |
| 191 * digilib specific routines | |
| 192 * ******************************************** */ | |
| 193 | |
| 238 | 194 |
| 195 function dl_param_init() { | |
| 196 // parameter initialisation before onload | |
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197 if (!baseScriptVersion) { |
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198 base_init(); |
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199 } |
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200 dlScriptVersion = "1.1b"; |
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201 dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0); |
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202 dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0); |
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203 dlTrafo = new Transform(); |
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204 dlMarks = new Array(); |
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205 dlFlags = new Object(); |
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206 elemScaler = null; |
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207 picElem = null; |
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208 ZOOMFACTOR = Math.sqrt(2); |
| 238 | 209 |
| 210 // put the query parameters (sans "?") in the parameters array | |
| 211 parseParameters(location.search.slice(1)); | |
| 212 // treat special parameters | |
| 213 dlMarks = parseMarks(); | |
| 214 dlArea = parseArea(); | |
| 215 dlFlags = parseFlags(); | |
| 216 } | |
| 217 | |
| 218 | |
| 237 | 219 function dl_init() { |
| 238 | 220 // initalisation on load |
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221 if (!dlScriptVersion) { |
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222 dl_param_init(); |
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223 } |
| 237 | 224 elemScaler = getElement("scaler", true); |
| 225 picElem = getElement("pic", true); | |
| 226 if (picElem == null && elemScaler) { | |
| 227 // in N4 pic is in the scaler layer | |
| 228 picElem = elemScaler.document.images[0]; | |
| 229 } | |
| 230 if ((!elemScaler)||(!picElem)) { | |
| 231 alert("Sorry, zogilib doesn't work here!"); | |
| 232 return false; | |
| 233 } | |
| 234 // give a name to the window containing digilib | |
| 235 if (defined(dlTarget)&&(dlTarget)) { | |
| 236 window.name = dlTarget; | |
| 237 } else { | |
| 238 window.name = "digilib"; | |
| 239 } | |
| 240 // put the query parameters (sans "?") in the parameters array | |
| 241 parseParameters(location.search.slice(1)); | |
| 242 // treat special parameters | |
| 243 dlMarks = parseMarks(); | |
| 244 dlArea = parseArea(); | |
| 245 dlFlags = parseFlags(); | |
| 246 // wait for image to load and display marks | |
| 247 renderMarks(); | |
| 248 // done | |
| 249 focus(); | |
| 250 return; | |
| 251 } | |
| 252 | |
| 253 | |
| 254 function display(detail) { | |
| 255 // redisplay the page | |
| 256 if (! detail) { | |
| 257 detail = 9; | |
| 258 } | |
| 259 var queryString = getAllParameters(detail); | |
| 260 location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 /* ********************************************** | |
| 265 * interactive digilib functions | |
| 266 * ******************************************** */ | |
| 267 | |
| 268 | |
| 269 function renderMarks() { | |
| 270 // put the visible marks on the image | |
| 271 var mark_count = dlMarks.length; | |
| 272 // make shure the image is loaded so we know its size | |
| 273 if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) { | |
| 274 setTimeout("renderMarks()", 100); | |
| 275 } else { | |
| 276 dlTrafo = parseTrafo(picElem); | |
| 277 for (var i = 0; i < 8; i++) { | |
| 278 var me = getElement("dot"+i); | |
| 279 if (i < mark_count) { | |
| 280 if (dlArea.containsPosition(dlMarks[i])) { | |
| 281 var mpos = dlTrafo.transform(dlMarks[i]); | |
| 282 // suboptimal to place -5 pixels and not half size of mark-image | |
| 283 mpos.x = mpos.x -5; | |
| 284 mpos.y = mpos.y -5; | |
| 285 moveElement(me, mpos); | |
| 286 showElement(me, true); | |
| 287 } | |
| 288 } else { | |
| 289 // hide the other marks | |
| 290 showElement(me, false); | |
| 291 } | |
| 292 } | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 | |
| 239 | 297 function setMark(reload) { |
| 237 | 298 // add a mark where clicked |
| 299 if ( dlMarks.length > 7 ) { | |
| 300 alert("Only 8 marks are possible at the moment!"); | |
| 301 return; | |
| 302 } | |
| 317 | 303 window.focus(); |
| 237 | 304 |
| 305 function markEvent(evt) { | |
| 306 // event handler adding a new mark | |
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307 unregisterEvent("mousedown", elemScaler, markEvent); |
| 237 | 308 var p = dlTrafo.invtransform(evtPosition(evt)); |
| 309 addMark(p); | |
| 239 | 310 if (defined(reload)&&(!reload)) { |
| 311 // don't redisplay | |
| 312 renderMarks(); | |
| 313 return; | |
| 314 } | |
| 237 | 315 display(); |
| 316 } | |
| 317 | |
| 318 // starting event capture | |
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319 registerEvent("mousedown", elemScaler, markEvent); |
| 237 | 320 } |
| 321 | |
| 322 | |
| 239 | 323 function removeMark(reload) { |
| 324 // remove the last mark | |
| 325 deleteMark(); | |
| 326 if (defined(reload)&&(!reload)) { | |
| 327 // don't redisplay | |
| 328 renderMarks(); | |
| 329 return; | |
| 330 } | |
| 331 display(); | |
| 332 } | |
| 333 | |
| 334 | |
| 237 | 335 function zoomArea() { |
| 336 var click = 1; | |
| 337 var pt1, pt2; | |
| 338 var eck1pos, eck2pos, eck3pos, eck4pos; | |
| 339 window.focus(); | |
| 340 var eck1 = getElement("eck1"); | |
| 341 var eck2 = getElement("eck2"); | |
| 342 var eck3 = getElement("eck3"); | |
| 343 var eck4 = getElement("eck4"); | |
| 344 | |
| 345 function zoomClick(evt) { | |
| 346 // mouse click handler | |
| 347 if (click == 1) { | |
| 348 // first click -- start moving | |
| 349 click = 2; | |
| 350 pt1 = evtPosition(evt); | |
| 351 pt2 = pt1; | |
| 352 eck1pos = pt1; | |
| 353 eck2pos = new Position(pt1.x - 12, pt1.y); | |
| 354 eck3pos = new Position(pt1.x, pt1.y - 12); | |
| 355 eck4pos = new Position(pt1.y - 12, pt1.y - 12); | |
| 356 moveElement(eck1, eck1pos); | |
| 357 moveElement(eck2, eck2pos); | |
| 358 moveElement(eck3, eck3pos); | |
| 359 moveElement(eck4, eck4pos); | |
| 360 showElement(eck1, true); | |
| 361 showElement(eck2, true); | |
| 362 showElement(eck3, true); | |
| 363 showElement(eck4, true); | |
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364 // show moving |
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365 registerEvent("mousemove", elemScaler, zoomMove); |
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366 registerEvent("mousemove", eck4, zoomMove); |
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367 // enable drag-to-zoom |
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368 registerEvent("mouseup", elemScaler, zoomClick); |
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369 registerEvent("mouseup", eck4, zoomClick); |
| 237 | 370 } else { |
| 371 // second click -- end moving | |
| 372 pt2 = evtPosition(evt); | |
| 373 showElement(eck1, false); | |
| 374 showElement(eck2, false); | |
| 375 showElement(eck3, false); | |
| 376 showElement(eck4, false); | |
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377 unregisterEvent("mousemove", elemScaler, zoomMove); |
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378 unregisterEvent("mousemove", eck4, zoomMove); |
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379 unregisterEvent("mousedown", elemScaler, zoomClick); |
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380 unregisterEvent("mousedown", eck4, zoomClick); |
| 237 | 381 var p1 = dlTrafo.invtransform(pt1); |
| 382 var p2 = dlTrafo.invtransform(pt2); | |
| 383 var ww = p2.x-p1.x; | |
| 384 var wh = p2.y-p1.y; | |
| 385 if ((ww > 0)&&(wh > 0)) { | |
| 386 setParameter("wx", cropFloat(p1.x)); | |
| 387 setParameter("wy", cropFloat(p1.y)); | |
| 388 setParameter("ww", cropFloat(ww)); | |
| 389 setParameter("wh", cropFloat(wh)); | |
| 390 parseArea(); | |
| 391 // zoomed is always fit | |
| 392 setParameter("ws", 1); | |
| 393 display(); | |
| 394 } | |
| 395 } | |
| 396 } | |
| 397 | |
| 398 function zoomMove(evt) { | |
| 399 // mouse move handler | |
| 400 pt2 = evtPosition(evt); | |
| 401 // restrict marks to move right and down | |
| 402 eck1pos = pt1; | |
| 403 eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y); | |
| 404 eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12); | |
| 405 eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12); | |
| 406 moveElement(eck1, eck1pos); | |
| 407 moveElement(eck2, eck2pos); | |
| 408 moveElement(eck3, eck3pos); | |
| 409 moveElement(eck4, eck4pos); | |
| 410 } | |
| 411 | |
| 412 // starting event capture | |
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413 registerEvent("mousedown", elemScaler, zoomClick); |
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414 registerEvent("mousedown", eck4, zoomClick); |
| 237 | 415 } |
| 416 | |
| 417 function zoomBy(factor) { | |
| 418 // zooms by the given factor | |
| 239 | 419 var newarea = dlArea.copy(); |
| 237 | 420 newarea.width /= factor; |
| 421 newarea.height /= factor; | |
| 422 newarea.x -= 0.5 * (newarea.width - dlArea.width); | |
| 423 newarea.y -= 0.5 * (newarea.height - dlArea.height); | |
| 424 newarea = dlMaxArea.fit(newarea); | |
| 425 setParamFromArea(newarea); | |
| 426 display(); | |
| 427 } | |
| 428 | |
| 429 | |
| 430 function zoomFullpage() { | |
| 431 // zooms out to show the whole image | |
| 432 setParameter("wx", 0.0); | |
| 433 setParameter("wy", 0.0); | |
| 434 setParameter("ww", 1.0); | |
| 435 setParameter("wh", 1.0); | |
| 436 display(); | |
| 437 } | |
| 438 | |
| 439 | |
| 440 function moveCenter() { | |
| 441 // move visible area so that it's centered around the clicked point | |
| 442 if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) { | |
| 443 // noting to do | |
| 444 return; | |
| 445 } | |
| 446 window.focus(); | |
| 447 | |
| 448 function moveCenterEvent(evt) { | |
| 449 // move to handler | |
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450 unregisterEvent("mousedown", elemScaler, moveCenterEvent); |
| 237 | 451 var pt = dlTrafo.invtransform(evtPosition(evt)); |
| 452 var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height); | |
| 453 newarea = dlMaxArea.fit(newarea); | |
| 454 // set parameters | |
| 455 setParamFromArea(newarea); | |
| 456 parseArea(); | |
| 457 display(); | |
| 458 } | |
| 459 | |
| 460 // starting event capture | |
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461 registerEvent("mousedown", elemScaler, moveCenterEvent); |
| 237 | 462 } |
| 463 | |
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464 function moveBy(movx, movy) { |
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465 // move visible area by movx and movy (in units of dw, dh) |
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466 if ((dlArea.width == 1.0)&&(dlArea.height == 1.0)) { |
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467 // nothing to do |
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468 return; |
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469 } |
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470 var newarea = dlArea.copy(); |
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471 newarea.x += parseFloat(movx)*dlArea.width; |
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472 newarea.y += parseFloat(movy)*dlArea.height; |
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473 newarea = dlMaxArea.fit(newarea); |
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474 // set parameters |
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475 setParamFromArea(newarea); |
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476 parseArea(); |
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477 display(); |
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478 } |
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479 |
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480 |
| 237 | 481 |
| 482 | |
| 238 | 483 function getRef() { |
| 237 | 484 // returns a reference to the current digilib set |
| 485 if (! baseUrl) { | |
| 486 var baseUrl = location.protocol + "//" + location.host + location.pathname; | |
| 487 } | |
| 488 var hyperlinkRef = baseUrl; | |
| 489 var par = getAllParameters(9); | |
| 490 if (par.length > 0) { | |
| 491 hyperlinkRef += "?" + par; | |
| 492 } | |
| 493 return hyperlinkRef; | |
| 494 } | |
| 317 | 495 |
| 496 function getRefWin(type, msg) { | |
| 497 // shows an alert with a reference to the current digilib set | |
| 498 if (! msg) { | |
| 499 msg = "Link for HTML documents"; | |
| 500 } | |
| 501 prompt(msg, getRef()); | |
| 502 } |