Mercurial > hg > digilib-old
annotate client/digitallibrary/dllib.js @ 329:1b7a6c0b2da8
fixed problems with Netscape4 (silly error by me partly :-)
| author | robcast |
|---|---|
| date | Tue, 02 Nov 2004 20:36:59 +0100 |
| parents | 610c7ee770cb |
| children | d14782908c37 |
| 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) |
| 317 | 20 Robert Casties, 27.10.2004 |
| 237 | 21 |
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22 ! Requires baselib.js ! |
| 237 | 23 |
| 24 */ | |
| 25 | |
| 317 | 26 var dlScriptVersion = "1.0b4"; |
| 27 | |
| 28 | |
| 29 function identify() { | |
| 30 // used for identifying a digilib instance | |
| 31 // Relato uses that function - lugi | |
| 32 return "Digilib 0.6"; | |
| 33 } | |
| 34 | |
| 237 | 35 |
| 36 /* | |
| 37 * more parameter handling | |
| 38 */ | |
| 39 | |
| 40 var dlArea = new Rectangle(0.0, 0.0, 1.0, 1.0); | |
| 41 var dlMaxArea = new Rectangle(0.0, 0.0, 1.0, 1.0); | |
| 42 | |
| 43 function parseArea() { | |
| 44 // returns area Rectangle from current parameters | |
| 45 return new Rectangle(getParameter("wx"), getParameter("wy"), getParameter("ww"), getParameter("wh")); | |
| 46 } | |
| 47 | |
| 48 function setParamFromArea(rect) { | |
| 49 // sets digilib wx etc. from rect | |
| 50 setParameter("wx", cropFloat(rect.x)); | |
| 51 setParameter("wy", cropFloat(rect.y)); | |
| 52 setParameter("ww", cropFloat(rect.width)); | |
| 53 setParameter("wh", cropFloat(rect.height)); | |
| 54 return true; | |
| 55 } | |
| 56 | |
| 57 var dlTrafo = new Transform(); | |
| 58 | |
| 59 function parseTrafo(elem) { | |
| 60 // returns Transform from current dlArea and picsize | |
| 61 var picsize = getElementRect(elem); | |
| 62 var trafo = new Transform(); | |
| 63 // subtract area offset and size | |
| 64 trafo.concat(getTranslation(new Position(-dlArea.x, -dlArea.y))); | |
| 65 trafo.concat(getScale(new Size(1/dlArea.width, 1/dlArea.height))); | |
| 66 // scale to screen size | |
| 67 trafo.concat(getScale(picsize)); | |
| 68 trafo.concat(getTranslation(picsize)); | |
| 69 // rotate | |
| 70 //trafo.concat(getRotation(- getParameter("rot"), new Position(0.5*picsize.width, 0.5*picsize.height))); | |
| 71 // mirror | |
| 72 //if (hasFlag("hmir")) { | |
| 73 //trafo.m00 = - trafo.m00; | |
| 74 //} | |
| 75 //if (hasFlag("vmir")) { | |
| 76 //trafo.m11 = - trafo.m11; | |
| 77 //} | |
| 78 return trafo; | |
| 79 } | |
| 80 | |
| 81 | |
| 82 var dlMarks = new Array(); | |
| 83 | |
| 84 function parseMarks() { | |
| 85 // returns marks array from current parameters | |
| 86 var marks = new Array(); | |
| 87 var ma; | |
| 88 var mk = getParameter("mk"); | |
| 89 if (mk.indexOf(";") >= 0) { | |
| 90 // old format with ";" | |
| 91 ma = mk.split(";"); | |
| 92 } else { | |
| 93 ma = mk.split(","); | |
| 94 } | |
| 95 for (var i = 0; i < ma.length ; i++) { | |
| 96 var pos = ma[i].split("/"); | |
| 97 if (pos.length > 1) { | |
| 98 marks.push(new Position(pos[0], pos[1])); | |
| 99 } | |
| 100 } | |
| 101 return marks; | |
| 102 } | |
| 103 | |
| 104 function getAllMarks() { | |
| 105 // returns a string with all marks in query format | |
| 106 var marks = new Array(); | |
| 107 for (var i = 0; i < dlMarks.length; i++) { | |
| 108 marks.push(cropFloat(dlMarks[i].x) + "/" + cropFloat(dlMarks[i].y)); | |
| 109 } | |
| 110 return marks.join(","); | |
| 111 } | |
| 112 | |
| 113 function addMark(pos) { | |
| 114 // add a mark | |
| 115 dlMarks.push(pos); | |
| 116 setParameter("mk", getAllMarks()); | |
| 117 return true; | |
| 118 } | |
| 119 | |
| 120 function deleteMark() { | |
| 121 // delete the last mark | |
| 122 dlMarks.pop(); | |
| 123 setParameter("mk", getAllMarks()); | |
| 124 return true; | |
| 125 } | |
| 126 | |
| 127 var dlFlags = new Object(); | |
| 128 | |
| 129 function hasFlag(mode) { | |
| 130 // returns if mode flag is set | |
| 131 return (dlFlags[mode]); | |
| 132 } | |
| 133 | |
| 134 function addFlag(mode) { | |
| 135 // add a mode flag | |
| 136 dlFlags[mode] = mode; | |
| 239 | 137 setParameter("mo", getAllFlags()); |
| 237 | 138 return true; |
| 139 } | |
| 140 | |
| 141 function removeFlag(mode) { | |
| 142 // remove a mode flag | |
| 143 if (dlFlags[mode]) { | |
| 144 delete dlFlags[mode]; | |
| 145 } | |
| 239 | 146 setParameter("mo", getAllFlags()); |
| 237 | 147 return true; |
| 148 } | |
| 149 | |
| 150 function toggleFlag(mode) { | |
| 151 // change a mode flag | |
| 152 if (dlFlags[mode]) { | |
| 153 delete dlFlags[mode]; | |
| 154 } else { | |
| 155 dlFlags[mode] = mode; | |
| 156 } | |
| 239 | 157 setParameter("mo", getAllFlags()); |
| 237 | 158 return true; |
| 159 } | |
| 160 | |
| 161 function getAllFlags() { | |
| 162 // returns a string with all flags in query format | |
| 163 var fa = new Array(); | |
| 164 for (var f in dlFlags) { | |
| 165 if ((f != "")&&(dlFlags[f] != null)) { | |
| 166 fa.push(f); | |
| 167 } | |
| 168 } | |
| 169 return fa.join(","); | |
| 170 } | |
| 171 | |
| 172 function parseFlags() { | |
| 173 // sets dlFlags from the current parameters | |
| 174 var flags = new Object(); | |
| 175 var fa = getParameter("mo").split(","); | |
| 176 for (var i = 0; i < fa.length ; i++) { | |
| 177 var f = fa[i]; | |
| 178 if (f != "") { | |
| 179 flags[f] = f; | |
| 180 } | |
| 181 } | |
| 182 return flags; | |
| 183 } | |
| 184 | |
| 185 | |
| 186 function bestPicSize(elem, inset) { | |
| 187 // returns a Size with the best image size for the given element | |
| 188 if (! defined(inset)) { | |
| 189 inset = 25; | |
| 190 } | |
| 191 var ws = getWinSize(); | |
| 192 var es = getElementPosition(elem); | |
| 193 if (es) { | |
| 194 ws.width = ws.width - es.x - inset; | |
| 195 ws.height = ws.height - es.y - inset; | |
| 196 } | |
| 197 return ws; | |
| 198 } | |
| 199 | |
| 200 | |
| 201 /* ********************************************** | |
| 202 * digilib specific routines | |
| 203 * ******************************************** */ | |
| 204 | |
| 205 var elemScaler = null; | |
| 206 var picElem = null; | |
| 207 | |
| 238 | 208 |
| 209 function dl_param_init() { | |
| 210 // parameter initialisation before onload | |
| 211 | |
| 212 // put the query parameters (sans "?") in the parameters array | |
| 213 parseParameters(location.search.slice(1)); | |
| 214 // treat special parameters | |
| 215 dlMarks = parseMarks(); | |
| 216 dlArea = parseArea(); | |
| 217 dlFlags = parseFlags(); | |
| 218 } | |
| 219 | |
| 220 | |
| 237 | 221 function dl_init() { |
| 238 | 222 // initalisation on load |
| 237 | 223 elemScaler = getElement("scaler", true); |
| 224 picElem = getElement("pic", true); | |
| 225 if (picElem == null && elemScaler) { | |
| 226 // in N4 pic is in the scaler layer | |
| 227 picElem = elemScaler.document.images[0]; | |
| 228 } | |
| 229 if ((!elemScaler)||(!picElem)) { | |
| 230 alert("Sorry, zogilib doesn't work here!"); | |
| 231 return false; | |
| 232 } | |
| 233 // give a name to the window containing digilib | |
| 234 if (defined(dlTarget)&&(dlTarget)) { | |
| 235 window.name = dlTarget; | |
| 236 } else { | |
| 237 window.name = "digilib"; | |
| 238 } | |
| 239 // put the query parameters (sans "?") in the parameters array | |
| 240 parseParameters(location.search.slice(1)); | |
| 241 // treat special parameters | |
| 242 dlMarks = parseMarks(); | |
| 243 dlArea = parseArea(); | |
| 244 dlFlags = parseFlags(); | |
| 245 // wait for image to load and display marks | |
| 246 renderMarks(); | |
| 247 // done | |
| 248 focus(); | |
| 249 return; | |
| 250 } | |
| 251 | |
| 252 | |
| 253 function display(detail) { | |
| 254 // redisplay the page | |
| 255 if (! detail) { | |
| 256 detail = 9; | |
| 257 } | |
| 258 var queryString = getAllParameters(detail); | |
| 259 location.href = location.protocol + "//" + location.host + location.pathname + "?" + queryString; | |
| 260 } | |
| 261 | |
| 262 | |
| 263 /* ********************************************** | |
| 264 * interactive digilib functions | |
| 265 * ******************************************** */ | |
| 266 | |
| 267 | |
| 268 function renderMarks() { | |
| 269 // put the visible marks on the image | |
| 270 var mark_count = dlMarks.length; | |
| 271 // make shure the image is loaded so we know its size | |
| 272 if (defined(picElem.complete) && picElem.complete == false && ! browserType.isN4 ) { | |
| 273 setTimeout("renderMarks()", 100); | |
| 274 } else { | |
| 275 dlTrafo = parseTrafo(picElem); | |
| 276 for (var i = 0; i < 8; i++) { | |
| 277 var me = getElement("dot"+i); | |
| 278 if (i < mark_count) { | |
| 279 if (dlArea.containsPosition(dlMarks[i])) { | |
| 280 var mpos = dlTrafo.transform(dlMarks[i]); | |
| 281 // suboptimal to place -5 pixels and not half size of mark-image | |
| 282 mpos.x = mpos.x -5; | |
| 283 mpos.y = mpos.y -5; | |
| 284 moveElement(me, mpos); | |
| 285 showElement(me, true); | |
| 286 } | |
| 287 } else { | |
| 288 // hide the other marks | |
| 289 showElement(me, false); | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 | |
| 239 | 296 function setMark(reload) { |
| 237 | 297 // add a mark where clicked |
| 298 if ( dlMarks.length > 7 ) { | |
| 299 alert("Only 8 marks are possible at the moment!"); | |
| 300 return; | |
| 301 } | |
| 317 | 302 window.focus(); |
| 237 | 303 |
| 304 function markEvent(evt) { | |
| 305 // event handler adding a new mark | |
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306 unregisterEvent("mousedown", elemScaler, markEvent); |
| 237 | 307 var p = dlTrafo.invtransform(evtPosition(evt)); |
| 308 addMark(p); | |
| 239 | 309 if (defined(reload)&&(!reload)) { |
| 310 // don't redisplay | |
| 311 renderMarks(); | |
| 312 return; | |
| 313 } | |
| 237 | 314 display(); |
| 315 } | |
| 316 | |
| 317 // starting event capture | |
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318 registerEvent("mousedown", elemScaler, markEvent); |
| 237 | 319 } |
| 320 | |
| 321 | |
| 239 | 322 function removeMark(reload) { |
| 323 // remove the last mark | |
| 324 deleteMark(); | |
| 325 if (defined(reload)&&(!reload)) { | |
| 326 // don't redisplay | |
| 327 renderMarks(); | |
| 328 return; | |
| 329 } | |
| 330 display(); | |
| 331 } | |
| 332 | |
| 333 | |
| 237 | 334 function zoomArea() { |
| 335 var click = 1; | |
| 336 var pt1, pt2; | |
| 337 var eck1pos, eck2pos, eck3pos, eck4pos; | |
| 338 window.focus(); | |
| 339 var eck1 = getElement("eck1"); | |
| 340 var eck2 = getElement("eck2"); | |
| 341 var eck3 = getElement("eck3"); | |
| 342 var eck4 = getElement("eck4"); | |
| 343 | |
| 344 function zoomClick(evt) { | |
| 345 // mouse click handler | |
| 346 if (click == 1) { | |
| 347 // first click -- start moving | |
| 348 click = 2; | |
| 349 pt1 = evtPosition(evt); | |
| 350 pt2 = pt1; | |
| 351 eck1pos = pt1; | |
| 352 eck2pos = new Position(pt1.x - 12, pt1.y); | |
| 353 eck3pos = new Position(pt1.x, pt1.y - 12); | |
| 354 eck4pos = new Position(pt1.y - 12, pt1.y - 12); | |
| 355 moveElement(eck1, eck1pos); | |
| 356 moveElement(eck2, eck2pos); | |
| 357 moveElement(eck3, eck3pos); | |
| 358 moveElement(eck4, eck4pos); | |
| 359 showElement(eck1, true); | |
| 360 showElement(eck2, true); | |
| 361 showElement(eck3, true); | |
| 362 showElement(eck4, true); | |
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363 // show moving |
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364 registerEvent("mousemove", elemScaler, zoomMove); |
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365 registerEvent("mousemove", eck4, zoomMove); |
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366 // enable drag-to-zoom |
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367 registerEvent("mouseup", elemScaler, zoomClick); |
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368 registerEvent("mouseup", eck4, zoomClick); |
| 237 | 369 } else { |
| 370 // second click -- end moving | |
| 371 pt2 = evtPosition(evt); | |
| 372 showElement(eck1, false); | |
| 373 showElement(eck2, false); | |
| 374 showElement(eck3, false); | |
| 375 showElement(eck4, false); | |
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376 unregisterEvent("mousemove", elemScaler, zoomMove); |
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377 unregisterEvent("mousemove", eck4, zoomMove); |
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378 unregisterEvent("mousedown", elemScaler, zoomClick); |
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379 unregisterEvent("mousedown", eck4, zoomClick); |
| 237 | 380 var p1 = dlTrafo.invtransform(pt1); |
| 381 var p2 = dlTrafo.invtransform(pt2); | |
| 382 var ww = p2.x-p1.x; | |
| 383 var wh = p2.y-p1.y; | |
| 384 if ((ww > 0)&&(wh > 0)) { | |
| 385 setParameter("wx", cropFloat(p1.x)); | |
| 386 setParameter("wy", cropFloat(p1.y)); | |
| 387 setParameter("ww", cropFloat(ww)); | |
| 388 setParameter("wh", cropFloat(wh)); | |
| 389 parseArea(); | |
| 390 // zoomed is always fit | |
| 391 setParameter("ws", 1); | |
| 392 display(); | |
| 393 } | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 function zoomMove(evt) { | |
| 398 // mouse move handler | |
| 399 pt2 = evtPosition(evt); | |
| 400 // restrict marks to move right and down | |
| 401 eck1pos = pt1; | |
| 402 eck2pos = new Position(Math.max(pt1.x, pt2.x)-12, pt1.y); | |
| 403 eck3pos = new Position(pt1.x, Math.max(pt1.y, pt2.y)-12); | |
| 404 eck4pos = new Position(Math.max(pt1.x, pt2.x)-12, Math.max(pt1.y, pt2.y)-12); | |
| 405 moveElement(eck1, eck1pos); | |
| 406 moveElement(eck2, eck2pos); | |
| 407 moveElement(eck3, eck3pos); | |
| 408 moveElement(eck4, eck4pos); | |
| 409 } | |
| 410 | |
| 411 // starting event capture | |
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412 registerEvent("mousedown", elemScaler, zoomClick); |
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413 registerEvent("mousedown", eck4, zoomClick); |
| 237 | 414 } |
| 415 | |
| 416 var ZOOMFACTOR = Math.sqrt(2); | |
| 417 | |
| 418 function zoomBy(factor) { | |
| 419 // zooms by the given factor | |
| 239 | 420 var newarea = dlArea.copy(); |
| 237 | 421 newarea.width /= factor; |
| 422 newarea.height /= factor; | |
| 423 newarea.x -= 0.5 * (newarea.width - dlArea.width); | |
| 424 newarea.y -= 0.5 * (newarea.height - dlArea.height); | |
| 425 newarea = dlMaxArea.fit(newarea); | |
| 426 setParamFromArea(newarea); | |
| 427 display(); | |
| 428 } | |
| 429 | |
| 430 | |
| 431 function zoomFullpage() { | |
| 432 // zooms out to show the whole image | |
| 433 setParameter("wx", 0.0); | |
| 434 setParameter("wy", 0.0); | |
| 435 setParameter("ww", 1.0); | |
| 436 setParameter("wh", 1.0); | |
| 437 display(); | |
| 438 } | |
| 439 | |
| 440 | |
| 441 function moveCenter() { | |
| 442 // move visible area so that it's centered around the clicked point | |
| 443 if ( (dlArea.width == 1.0) && (dlArea.height == 1.0) ) { | |
| 444 // noting to do | |
| 445 return; | |
| 446 } | |
| 447 window.focus(); | |
| 448 | |
| 449 function moveCenterEvent(evt) { | |
| 450 // move to handler | |
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451 unregisterEvent("mousedown", elemScaler, moveCenterEvent); |
| 237 | 452 var pt = dlTrafo.invtransform(evtPosition(evt)); |
| 453 var newarea = new Rectangle(pt.x-0.5*dlArea.width, pt.y-0.5*dlArea.height, dlArea.width, dlArea.height); | |
| 454 newarea = dlMaxArea.fit(newarea); | |
| 455 // set parameters | |
| 456 setParamFromArea(newarea); | |
| 457 parseArea(); | |
| 458 display(); | |
| 459 } | |
| 460 | |
| 461 // starting event capture | |
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462 registerEvent("mousedown", elemScaler, moveCenterEvent); |
| 237 | 463 } |
| 464 | |
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465 function moveBy(movx, movy) { |
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466 // move visible area by movx and movy (in units of dw, dh) |
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467 if ((dlArea.width == 1.0)&&(dlArea.height == 1.0)) { |
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468 // nothing to do |
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469 return; |
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470 } |
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471 var newarea = dlArea.copy(); |
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472 newarea.x += parseFloat(movx)*dlArea.width; |
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473 newarea.y += parseFloat(movy)*dlArea.height; |
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474 newarea = dlMaxArea.fit(newarea); |
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475 // set parameters |
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476 setParamFromArea(newarea); |
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477 parseArea(); |
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478 display(); |
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479 } |
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480 |
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481 |
| 237 | 482 |
| 483 | |
| 238 | 484 function getRef() { |
| 237 | 485 // returns a reference to the current digilib set |
| 486 if (! baseUrl) { | |
| 487 var baseUrl = location.protocol + "//" + location.host + location.pathname; | |
| 488 } | |
| 489 var hyperlinkRef = baseUrl; | |
| 490 var par = getAllParameters(9); | |
| 491 if (par.length > 0) { | |
| 492 hyperlinkRef += "?" + par; | |
| 493 } | |
| 494 return hyperlinkRef; | |
| 495 } | |
| 317 | 496 |
| 497 function getRefWin(type, msg) { | |
| 498 // shows an alert with a reference to the current digilib set | |
| 499 if (! msg) { | |
| 500 msg = "Link for HTML documents"; | |
| 501 } | |
| 502 prompt(msg, getRef()); | |
| 503 } |