Mercurial > hg > digilib-old
annotate webapp/src/main/webapp/jquery/jquery.digilib.geometry.js @ 1113:7affda55c10e
using annotator in digilib works somewhat now.
| author | robcast |
|---|---|
| date | Thu, 01 Nov 2012 18:38:11 +0100 |
| parents | 1e4f4964e9c2 |
| children | efe4b0f18cf8 |
| rev | line source |
|---|---|
| 785 | 1 /** required digilib geometry plugin |
| 2 */ | |
| 3 | |
| 4 (function($) { | |
| 5 //var dlGeometry = function() { | |
| 6 /* | |
| 7 * Size class | |
| 8 */ | |
| 9 var size = function(w, h) { | |
| 10 var that; | |
| 11 if (typeof w === "object") { | |
| 1012 | 12 // assume an object having width and height |
| 785 | 13 that = { |
| 14 width : w.width, | |
| 15 height : w.height | |
| 16 }; | |
| 17 } else { | |
| 18 that = { | |
| 19 width : parseFloat(w), | |
| 20 height : parseFloat(h) | |
| 21 }; | |
| 22 } | |
| 1012 | 23 // returns true if both sizes are equal |
| 785 | 24 that.equals = function(other) { |
| 25 return (this.width === other.width && this.height === other.height); | |
| 26 }; | |
| 1012 | 27 // returns the aspect ratio of this size |
| 28 that.getAspect = function() { | |
| 29 return (this.width / this.height); | |
| 30 }; | |
| 31 // returns a size of a given aspect ratio that fits into this one | |
| 32 that.fitAspect = function(aspect) { | |
| 33 var s = size(this); | |
| 34 if (aspect > this.getAspect()) { | |
| 35 // size is more horizontally stretched than this | |
| 36 s.height = s.width / aspect; | |
| 37 } else { | |
| 38 s.width = s.height * aspect; | |
| 39 } | |
| 40 return s; | |
| 41 }; | |
| 957 | 42 // adjusts size of jQuery element "$elem" to this size |
| 43 that.adjustDiv = function($elem) { | |
| 44 $elem.width(this.width).height(this.height); | |
| 45 }; | |
| 785 | 46 that.toString = function() { |
| 47 return (this.width + "x" + this.height); | |
| 48 }; | |
| 49 return that; | |
| 50 }; | |
| 51 | |
| 52 /* | |
| 53 * Position class | |
| 54 */ | |
| 55 var position = function(x, y) { | |
| 56 var that; | |
| 57 if (typeof x === "object") { | |
| 58 if (x instanceof jQuery) { | |
| 59 // jQuery object | |
| 60 var pos = x.offset(); | |
| 61 that = { | |
| 62 x : pos.left, | |
| 63 y : pos.top | |
| 64 }; | |
| 65 } else { | |
| 66 if (x.x != null) { | |
| 67 // position object | |
| 68 that = { | |
| 69 x : x.x, | |
| 70 y : x.y | |
| 71 }; | |
| 72 } | |
| 73 if (x.pageX != null) { | |
| 74 // event object | |
| 75 that = { | |
| 76 x : x.pageX, | |
| 77 y : x.pageY | |
| 78 }; | |
| 79 } | |
| 80 } | |
| 81 } else { | |
| 82 that = { | |
| 83 x : parseFloat(x), | |
| 84 y : parseFloat(y) | |
| 85 }; | |
| 86 } | |
| 87 that.equals = function(other) { | |
| 88 return (this.x === other.x && this.y === other.y); | |
| 89 }; | |
| 90 // add position other to this | |
| 91 that.add = function(other) { | |
| 92 this.x += other.x; | |
| 93 this.y += other.y; | |
| 94 return this; | |
| 95 }; | |
| 96 // returns negative position | |
| 97 that.neg = function() { | |
| 98 return position({ | |
| 99 x : -this.x, | |
| 100 y : -this.y | |
| 101 }); | |
| 102 }; | |
| 103 // returns new position that is the difference between this and other | |
| 104 that.delta = function(other) { | |
| 105 return position({ | |
| 106 x : other.x - this.x, | |
| 107 y : other.y - this.y | |
| 108 }); | |
| 109 }; | |
| 944 | 110 // adjusts CSS position of $elem to this position |
| 785 | 111 that.adjustDiv = function($elem) { |
| 112 $elem.offset({ | |
| 113 left : this.x, | |
| 114 top : this.y | |
| 115 }); | |
| 116 }; | |
| 117 // returns distance of this position to pos (length if pos == null) | |
| 118 that.distance = function(pos) { | |
| 119 if (pos == null) { | |
| 120 pos = { | |
| 121 x : 0, | |
| 122 y : 0 | |
| 123 }; | |
| 124 } | |
| 125 var dx = pos.x - this.x; | |
| 126 var dy = pos.y - this.y; | |
| 127 return Math.sqrt(dx * dx + dy * dy); | |
| 128 }; | |
| 1113 | 129 // returns position in css-compatible format |
| 130 that.getAsCss = function() { | |
| 131 return { | |
| 132 left : this.x, | |
| 133 top : this.y, | |
| 134 }; | |
| 135 }; | |
| 785 | 136 that.toString = function() { |
| 137 return (this.x + "," + this.y); | |
| 138 }; | |
| 139 return that; | |
| 140 }; | |
| 141 /* | |
| 142 * Rectangle class | |
| 143 */ | |
| 144 var rectangle = function(x, y, w, h) { | |
| 145 var that = {}; | |
| 146 if (typeof x === "object") { | |
| 147 if (x instanceof jQuery) { | |
| 148 // jQuery object | |
| 149 var pos = x.offset(); | |
| 150 that = { | |
| 151 x : pos.left, | |
| 152 y : pos.top, | |
| 153 width : x.width(), | |
| 154 height : x.height() | |
| 155 }; | |
| 156 } else if (y == null) { | |
| 157 // assume x is rectangle | |
| 158 that = { | |
| 974 | 159 x : x.x || 0, |
| 160 y : x.y || 0, | |
| 161 width : x.width || 0, | |
| 162 height : x.height || 0 | |
| 785 | 163 }; |
| 164 } else { | |
| 165 // assume x and y are Position | |
| 166 that = { | |
| 167 x : Math.min(x.x, y.x), | |
| 168 y : Math.min(x.y, y.y), | |
| 169 width : Math.abs(y.x - x.x), | |
| 170 height : Math.abs(y.y - x.y) | |
| 171 }; | |
| 172 } | |
| 173 } else { | |
| 174 that = { | |
| 175 x : parseFloat(x), | |
| 176 y : parseFloat(y), | |
| 177 width : parseFloat(w), | |
| 178 height : parseFloat(h) | |
| 179 }; | |
| 180 } | |
| 181 // returns a copy of this Rectangle | |
| 182 that.copy = function() { | |
| 183 return rectangle(this); | |
| 184 }; | |
| 185 // returns the position of this Rectangle | |
| 186 that.getPosition = function() { | |
| 187 return position(this); | |
| 188 }; | |
| 189 // returns the size of this Rectangle | |
| 190 that.getSize = function() { | |
| 191 return size(this); | |
| 192 }; | |
| 193 // returns the upper left corner position | |
| 194 that.getPt1 = that.getPosition; | |
| 195 // returns the lower right corner position of this Rectangle | |
| 196 that.getPt2 = function() { | |
| 197 return position({ | |
| 198 x : this.x + this.width, | |
| 199 y : this.y + this.height | |
| 200 }); | |
| 201 }; | |
| 202 // sets the upper left corner position to pos | |
| 203 that.setPosition = function(pos) { | |
| 204 this.x = pos.x; | |
| 205 this.y = pos.y; | |
| 206 return this; | |
| 207 }; | |
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208 // adds pos to the position |
| 785 | 209 that.setPt1 = that.setPosition; // TODO: not really the same |
| 210 that.addPosition = function(pos) { | |
| 211 this.x += pos.x; | |
| 212 this.y += pos.y; | |
| 213 return this; | |
| 214 }; | |
| 877 | 215 // adds pos to the dimensions |
| 216 that.enlarge = function(pos) { | |
| 217 this.width += pos.x; | |
| 218 this.height += pos.y; | |
| 219 return this; | |
| 220 }; | |
| 785 | 221 // sets the lower right corner to position pos |
| 222 that.setPt2 = function(pos) { | |
| 223 this.width = pos.x - this.x; | |
| 224 this.height = pos.y - this.y; | |
| 225 return this; | |
| 226 }; | |
| 227 // returns the center position of this Rectangle | |
| 228 that.getCenter = function() { | |
| 229 return position({ | |
| 230 x : this.x + this.width / 2, | |
| 231 y : this.y + this.height / 2 | |
| 232 }); | |
| 233 }; | |
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234 // moves this rectangle's center to position pos |
| 785 | 235 that.setCenter = function(pos) { |
| 236 this.x = pos.x - this.width / 2; | |
| 237 this.y = pos.y - this.height / 2; | |
| 238 return this; | |
| 239 }; | |
| 944 | 240 // returns true if both rectangles have equal position and size |
| 785 | 241 that.equals = function(other) { |
| 242 var eq = (this.x === other.x && this.y === other.y && this.width === other.width); | |
| 243 return eq; | |
| 244 }; | |
| 944 | 245 // returns a rectangle with the difference width, height and position |
| 246 that.delta = function(other) { | |
| 247 return rectangle(other.x - this.x, other.y - this.y, | |
| 248 other.width - this.width, other.height - this.height); | |
| 249 }; | |
| 785 | 250 // returns the area of this Rectangle |
| 251 that.getArea = function() { | |
| 252 return (this.width * this.height); | |
| 253 }; | |
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254 // returns the aspect ratio of this Rectangle |
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255 that.getAspect = function() { |
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256 return (this.width / this.height); |
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257 }; |
| 785 | 258 // eliminates negative width and height |
| 259 that.normalize = function() { | |
| 260 var p = this.getPt2(); | |
| 261 this.x = Math.min(this.x, p.x); | |
| 262 this.y = Math.min(this.y, p.y); | |
| 263 this.width = Math.abs(this.width); | |
| 264 this.height = Math.abs(this.height); | |
| 265 return this; | |
| 266 }; | |
| 267 // returns if Position "pos" lies inside of this rectangle | |
| 268 that.containsPosition = function(pos) { | |
| 269 var ct = ((pos.x >= this.x) && (pos.y >= this.y) | |
| 270 && (pos.x <= this.x + this.width) && (pos.y <= this.y | |
| 271 + this.height)); | |
| 272 return ct; | |
| 273 }; | |
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274 // returns true if rectangle "rect" is contained in this rectangle |
| 785 | 275 that.containsRect = function(rect) { |
| 276 return (this.containsPosition(rect.getPt1()) && this | |
| 277 .containsPosition(rect.getPt2())); | |
| 278 }; | |
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279 // returns true if rectangle "rect" and this rectangle overlap |
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280 that.overlapsRect = function(rect) { |
| 812 | 281 return this.intersect(rect) != null; |
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282 }; |
| 785 | 283 // changes this rectangle's x/y values so it stays inside of rectangle |
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284 // "rect", keeping the proportions |
| 785 | 285 that.stayInside = function(rect) { |
| 812 | 286 this.x = Math.max(this.x, rect.x); |
| 287 this.y = Math.max(this.y, rect.y); | |
| 785 | 288 if (this.x + this.width > rect.x + rect.width) { |
| 289 this.x = rect.x + rect.width - this.width; | |
| 290 } | |
| 291 if (this.y + this.height > rect.y + rect.height) { | |
| 292 this.y = rect.y + rect.height - this.height; | |
| 293 } | |
| 294 return this; | |
| 295 }; | |
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296 // clips this rectangle so it stays inside of rectangle "rect" |
| 785 | 297 that.clipTo = function(rect) { |
| 298 var p1 = rect.getPt1(); | |
| 299 var p2 = rect.getPt2(); | |
| 300 var this2 = this.getPt2(); | |
| 301 this.setPosition(position(Math.max(this.x, p1.x), Math.max(this.y, p1.y))); | |
| 302 this.setPt2(position(Math.min(this2.x, p2.x), Math.min(this2.y, p2.y))); | |
| 303 return this; | |
| 304 }; | |
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305 // returns the intersection of rectangle "rect" and this one |
| 785 | 306 that.intersect = function(rect) { |
| 847 | 307 var r = rect.copy(); |
| 308 var result = r.clipTo(this); | |
| 309 if (result.width < 0 || result.height < 0) result = null; | |
| 310 return result; | |
| 785 | 311 }; |
| 812 | 312 |
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313 // returns a copy of rectangle "rect" that fits into this one |
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314 // (moving it first) |
| 785 | 315 that.fit = function(rect) { |
| 847 | 316 var r = rect.copy(); |
| 317 r.x = Math.max(r.x, this.x); | |
| 318 r.y = Math.max(r.y, this.x); | |
| 319 if (r.x + r.width > this.x + this.width) { | |
| 320 r.x = this.x + this.width - r.width; | |
| 785 | 321 } |
| 847 | 322 if (r.y + r.height > this.y + this.height) { |
| 323 r.y = this.y + this.height - r.height; | |
| 785 | 324 } |
| 847 | 325 return r.intersect(this); |
| 785 | 326 }; |
| 1012 | 327 |
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328 // adjusts position and size of jQuery element "$elem" to this rectangle |
| 785 | 329 that.adjustDiv = function($elem) { |
| 330 $elem.offset({ | |
| 331 left : this.x, | |
| 332 top : this.y | |
| 333 }); | |
| 334 $elem.width(this.width).height(this.height); | |
| 335 }; | |
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336 // returns position and size of this rectangle in css-compatible format |
| 785 | 337 that.getAsCss = function() { |
| 338 return { | |
| 339 left : this.x, | |
| 340 top : this.y, | |
| 341 width : this.width, | |
| 342 height : this.height | |
| 343 }; | |
| 344 }; | |
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345 // returns position and size of this rectangle formatted for SVG attributes |
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346 that.getAsSvg = function() { |
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347 return [this.x, this.y, this.width, this.height].join(" "); |
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348 }; |
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349 // returns size and position of this rectangle formatted for ??? (w x h@x,y) |
| 785 | 350 that.toString = function() { |
| 351 return this.width + "x" + this.height + "@" + this.x + "," + this.y; | |
| 352 }; | |
| 353 return that; | |
| 354 }; | |
| 355 | |
| 356 /* | |
| 357 * Transform class | |
| 358 * | |
| 359 * defines a class of affine transformations | |
| 360 */ | |
| 361 var transform = function(spec) { | |
| 362 var that = { | |
| 363 m00 : 1.0, | |
| 364 m01 : 0.0, | |
| 365 m02 : 0.0, | |
| 366 m10 : 0.0, | |
| 367 m11 : 1.0, | |
| 368 m12 : 0.0, | |
| 369 m20 : 0.0, | |
| 370 m21 : 0.0, | |
| 371 m22 : 1.0 | |
| 372 }; | |
| 373 if (spec) { | |
| 374 jQuery.extend(that, spec); | |
| 375 } | |
| 376 ; | |
| 377 that.concat = function(trafA) { | |
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378 // add Transform trafA to this Transform (i.e. this = trafC = trafA * this) |
| 785 | 379 var trafC = {}; |
| 380 for ( var i = 0; i < 3; i++) { | |
| 381 for ( var j = 0; j < 3; j++) { | |
| 382 var c = 0.0; | |
| 383 for ( var k = 0; k < 3; k++) { | |
| 384 c += trafA["m" + i + k] * this["m" + k + j]; | |
| 385 } | |
| 386 trafC["m" + i + j] = c; | |
| 387 } | |
| 388 } | |
| 389 jQuery.extend(this, trafC); | |
| 390 return this; | |
| 391 }; | |
| 392 that.transform = function(rect) { | |
| 393 // returns transformed Rectangle or Position with this Transform | |
| 394 // applied | |
| 395 var x = this.m00 * rect.x + this.m01 * rect.y + this.m02; | |
| 396 var y = this.m10 * rect.x + this.m11 * rect.y + this.m12; | |
| 397 var pt = position(x, y); | |
| 398 if (rect.width) { | |
| 399 // transform the other corner point | |
| 400 var pt2 = this.transform(rect.getPt2()); | |
| 401 return rectangle(pt, pt2); | |
| 402 } | |
| 403 return pt; | |
| 404 }; | |
| 405 that.invtransform = function(rect) { | |
| 406 // returns transformed Rectangle or Position with the inverse of | |
| 407 // this Transform applied | |
| 408 var det = this.m00 * this.m11 - this.m01 * this.m10; | |
| 409 var x = (this.m11 * rect.x - this.m01 * rect.y - this.m11 | |
| 410 * this.m02 + this.m01 * this.m12) | |
| 411 / det; | |
| 412 var y = (-this.m10 * rect.x + this.m00 * rect.y + this.m10 | |
| 413 * this.m02 - this.m00 * this.m12) | |
| 414 / det; | |
| 415 var pt = position(x, y); | |
| 416 if (rect.width) { | |
| 417 // transform the other corner point | |
| 418 var pt2 = this.invtransform(rect.getPt2()); | |
| 419 return rectangle(pt, pt2); | |
| 420 } | |
| 421 return pt; | |
| 422 }; | |
| 423 that.toString = function(pretty) { | |
| 424 var s = '['; | |
| 425 if (pretty) | |
| 426 s += '\n'; | |
| 427 for ( var i = 0; i < 3; ++i) { | |
| 428 s += '['; | |
| 429 for ( var j = 0; j < 3; ++j) { | |
| 430 if (j) | |
| 431 s += ','; | |
| 432 s += this['m' + i + j]; | |
| 433 } | |
| 434 s += ']'; | |
| 435 if (pretty) | |
| 436 s += '\n'; | |
| 437 } | |
| 438 s += ']'; | |
| 439 if (pretty) | |
| 440 s += '\n'; | |
| 441 return s; | |
| 442 }; | |
| 443 // add class methods to instance | |
| 444 that.getRotation = transform.getRotation; | |
| 445 that.getRotationAround = transform.getRotationAround; | |
| 446 that.getTranslation = transform.getTranslation; | |
| 447 that.getMirror = transform.getMirror; | |
| 448 that.getScale = transform.getScale; | |
| 449 | |
| 450 return that; | |
| 451 }; | |
| 452 | |
| 453 transform.getRotation = function(angle) { | |
| 454 // returns a Transform that is a rotation by angle degrees around [0,0] | |
| 455 if (angle !== 0) { | |
| 456 var t = Math.PI * parseFloat(angle) / 180.0; | |
| 457 var cost = Math.cos(t); | |
| 458 var sint = Math.sin(t); | |
| 459 var traf = { | |
| 460 m00 : cost, | |
| 461 m01 : -sint, | |
| 462 m10 : sint, | |
| 463 m11 : cost | |
| 464 }; | |
| 465 return transform(traf); | |
| 466 } | |
| 467 return transform(); | |
| 468 }; | |
| 469 | |
| 470 transform.getRotationAround = function(angle, pos) { | |
| 471 // returns a Transform that is a rotation by angle degrees around pos | |
| 472 var traf = transform.getTranslation(pos.neg()); | |
| 473 traf.concat(transform.getRotation(angle)); | |
| 474 traf.concat(transform.getTranslation(pos)); | |
| 475 return traf; | |
| 476 }; | |
| 477 | |
| 478 transform.getTranslation = function(pos) { | |
| 479 // returns a Transform that is a translation by [pos.x, pos,y] | |
| 480 var traf = { | |
| 481 m02 : pos.x, | |
| 482 m12 : pos.y | |
| 483 }; | |
| 484 return transform(traf); | |
| 485 }; | |
| 486 | |
| 487 transform.getMirror = function(type) { | |
| 488 // returns a Transform that is a mirror about the axis type | |
| 489 if (type === 'x') { | |
| 490 var traf = { | |
| 491 m00 : 1, | |
| 492 m11 : -1 | |
| 493 }; | |
| 494 } else { | |
| 495 var traf = { | |
| 496 m00 : -1, | |
| 497 m11 : 1 | |
| 498 }; | |
| 499 } | |
| 500 return transform(traf); | |
| 501 }; | |
| 502 | |
| 503 transform.getScale = function(size) { | |
| 504 // returns a Transform that is a scale by [size.width, size.height] | |
| 505 var traf = { | |
| 506 m00 : size.width, | |
| 507 m11 : size.height | |
| 508 }; | |
| 509 return transform(traf); | |
| 510 }; | |
| 511 | |
| 786 | 512 // export constructor functions to digilib plugin |
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513 var geometry = { |
| 786 | 514 size : size, |
| 515 position : position, | |
| 516 rectangle : rectangle, | |
| 517 transform : transform | |
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518 }; |
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519 // install function called by digilib on plugin object |
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520 var install = function() { |
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521 // add constructor object to fn |
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522 this.fn.geometry = geometry; |
| 785 | 523 }; |
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524 // digilib plugin object |
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525 var plugin = { |
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526 name : 'geometry', |
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527 install : install, |
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528 fn : {}, |
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529 // TODO: remove old init |
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530 init : init |
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531 }; |
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532 // TODO: remove old version of init returning contructor |
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533 var init = function () { |
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534 return geometry; |
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535 }; |
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536 // plug into digilib |
| 786 | 537 if ($.fn.digilib == null) { |
| 538 $.error("jquery.digilib.geometry must be loaded after jquery.digilib!"); | |
| 539 } else { | |
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540 $.fn.digilib('plugin', plugin); |
| 786 | 541 } |
| 785 | 542 })(jQuery); |