/
world.js
433 lines (385 loc) · 15.5 KB
/
world.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
/*
* OpenSeadragon - World
*
* Copyright (C) 2009 CodePlex Foundation
* Copyright (C) 2010-2013 OpenSeadragon contributors
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of CodePlex Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
(function( $ ){
/**
* @class World
* @memberof OpenSeadragon
* @extends OpenSeadragon.EventSource
* @classdesc Keeps track of all of the tiled images in the scene.
* @param {Object} options - World options.
* @param {OpenSeadragon.Viewer} options.viewer - The Viewer that owns this World.
**/
$.World = function( options ) {
var _this = this;
$.console.assert( options.viewer, "[World] options.viewer is required" );
$.EventSource.call( this );
this.viewer = options.viewer;
this._items = [];
this._needsDraw = false;
this._autoRefigureSizes = true;
this._needsSizesFigured = false;
this._delegatedFigureSizes = function(event) {
if (_this._autoRefigureSizes) {
_this._figureSizes();
} else {
_this._needsSizesFigured = true;
}
};
this._figureSizes();
};
$.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.World.prototype */{
/**
* Add the specified item.
* @param {OpenSeadragon.TiledImage} item - The item to add.
* @param {Number} [options.index] - Index for the item. If not specified, goes at the top.
* @fires OpenSeadragon.World.event:add-item
* @fires OpenSeadragon.World.event:metrics-change
*/
addItem: function( item, options ) {
$.console.assert(item, "[World.addItem] item is required");
$.console.assert(item instanceof $.TiledImage, "[World.addItem] only TiledImages supported at this time");
options = options || {};
if (options.index !== undefined) {
var index = Math.max(0, Math.min(this._items.length, options.index));
this._items.splice(index, 0, item);
} else {
this._items.push( item );
}
if (this._autoRefigureSizes) {
this._figureSizes();
} else {
this._needsSizesFigured = true;
}
this._needsDraw = true;
item.addHandler('bounds-change', this._delegatedFigureSizes);
/**
* Raised when an item is added to the World.
* @event add-item
* @memberOf OpenSeadragon.World
* @type {object}
* @property {OpenSeadragon.Viewer} eventSource - A reference to the World which raised the event.
* @property {OpenSeadragon.TiledImage} item - The item that has been added.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'add-item', {
item: item
} );
},
/**
* Get the item at the specified index.
* @param {Number} index - The item's index.
* @returns {OpenSeadragon.TiledImage} The item at the specified index.
*/
getItemAt: function( index ) {
$.console.assert(index !== undefined, "[World.getItemAt] index is required");
return this._items[ index ];
},
/**
* Get the index of the given item or -1 if not present.
* @param {OpenSeadragon.TiledImage} item - The item.
* @returns {Number} The index of the item or -1 if not present.
*/
getIndexOfItem: function( item ) {
$.console.assert(item, "[World.getIndexOfItem] item is required");
return $.indexOf( this._items, item );
},
/**
* @returns {Number} The number of items used.
*/
getItemCount: function() {
return this._items.length;
},
/**
* Change the index of a item so that it appears over or under others.
* @param {OpenSeadragon.TiledImage} item - The item to move.
* @param {Number} index - The new index.
* @fires OpenSeadragon.World.event:item-index-change
*/
setItemIndex: function( item, index ) {
$.console.assert(item, "[World.setItemIndex] item is required");
$.console.assert(index !== undefined, "[World.setItemIndex] index is required");
var oldIndex = this.getIndexOfItem( item );
if ( index >= this._items.length ) {
throw new Error( "Index bigger than number of layers." );
}
if ( index === oldIndex || oldIndex === -1 ) {
return;
}
this._items.splice( oldIndex, 1 );
this._items.splice( index, 0, item );
this._needsDraw = true;
/**
* Raised when the order of the indexes has been changed.
* @event item-index-change
* @memberOf OpenSeadragon.World
* @type {object}
* @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.
* @property {OpenSeadragon.TiledImage} item - The item whose index has
* been changed
* @property {Number} previousIndex - The previous index of the item
* @property {Number} newIndex - The new index of the item
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'item-index-change', {
item: item,
previousIndex: oldIndex,
newIndex: index
} );
},
/**
* Remove an item.
* @param {OpenSeadragon.TiledImage} item - The item to remove.
* @fires OpenSeadragon.World.event:remove-item
* @fires OpenSeadragon.World.event:metrics-change
*/
removeItem: function( item ) {
$.console.assert(item, "[World.removeItem] item is required");
var index = $.indexOf(this._items, item );
if ( index === -1 ) {
return;
}
item.removeHandler('bounds-change', this._delegatedFigureSizes);
item.destroy();
this._items.splice( index, 1 );
this._figureSizes();
this._needsDraw = true;
this._raiseRemoveItem(item);
},
/**
* Remove all items.
* @fires OpenSeadragon.World.event:remove-item
* @fires OpenSeadragon.World.event:metrics-change
*/
removeAll: function() {
// We need to make sure any pending images are canceled so the world items don't get messed up
this.viewer._cancelPendingImages();
var item;
for (var i = 0; i < this._items.length; i++) {
item = this._items[i];
item.removeHandler('bounds-change', this._delegatedFigureSizes);
item.destroy();
}
var removedItems = this._items;
this._items = [];
this._figureSizes();
this._needsDraw = true;
for (i = 0; i < removedItems.length; i++) {
item = removedItems[i];
this._raiseRemoveItem(item);
}
},
/**
* Clears all tiles and triggers updates for all items.
*/
resetItems: function() {
for ( var i = 0; i < this._items.length; i++ ) {
this._items[i].reset();
}
},
/**
* Updates (i.e. animates bounds of) all items.
*/
update: function() {
var animated = false;
for ( var i = 0; i < this._items.length; i++ ) {
animated = this._items[i].update() || animated;
}
return animated;
},
/**
* Draws all items.
*/
draw: function() {
for ( var i = 0; i < this._items.length; i++ ) {
this._items[i].draw();
}
this._needsDraw = false;
},
/**
* @returns {Boolean} true if any items need updating.
*/
needsDraw: function() {
for ( var i = 0; i < this._items.length; i++ ) {
if ( this._items[i].needsDraw() ) {
return true;
}
}
return this._needsDraw;
},
/**
* @returns {OpenSeadragon.Rect} The smallest rectangle that encloses all items, in viewport coordinates.
*/
getHomeBounds: function() {
return this._homeBounds.clone();
},
/**
* To facilitate zoom constraints, we keep track of the pixel density of the
* densest item in the World (i.e. the item whose content size to viewport size
* ratio is the highest) and save it as this "content factor".
* @returns {Number} the number of content units per viewport unit.
*/
getContentFactor: function() {
return this._contentFactor;
},
/**
* As a performance optimization, setting this flag to false allows the bounds-change event handler
* on tiledImages to skip calculations on the world bounds. If a lot of images are going to be positioned in
* rapid succession, this is a good idea. When finished, setAutoRefigureSizes should be called with true
* or the system may behave oddly.
* @param {Boolean} [value] The value to which to set the flag.
*/
setAutoRefigureSizes: function(value) {
this._autoRefigureSizes = value;
if (value & this._needsSizesFigured) {
this._figureSizes();
this._needsSizesFigured = false;
}
},
/**
* Arranges all of the TiledImages with the specified settings.
* @param {Object} options - Specifies how to arrange.
* @param {Boolean} [options.immediately=false] - Whether to animate to the new arrangement.
* @param {String} [options.layout] - See collectionLayout in {@link OpenSeadragon.Options}.
* @param {Number} [options.rows] - See collectionRows in {@link OpenSeadragon.Options}.
* @param {Number} [options.columns] - See collectionColumns in {@link OpenSeadragon.Options}.
* @param {Number} [options.tileSize] - See collectionTileSize in {@link OpenSeadragon.Options}.
* @param {Number} [options.tileMargin] - See collectionTileMargin in {@link OpenSeadragon.Options}.
* @fires OpenSeadragon.World.event:metrics-change
*/
arrange: function(options) {
options = options || {};
var immediately = options.immediately || false;
var layout = options.layout || $.DEFAULT_SETTINGS.collectionLayout;
var rows = options.rows || $.DEFAULT_SETTINGS.collectionRows;
var columns = options.columns || $.DEFAULT_SETTINGS.collectionColumns;
var tileSize = options.tileSize || $.DEFAULT_SETTINGS.collectionTileSize;
var tileMargin = options.tileMargin || $.DEFAULT_SETTINGS.collectionTileMargin;
var increment = tileSize + tileMargin;
var wrap;
if (!options.rows && columns) {
wrap = columns;
} else {
wrap = Math.ceil(this._items.length / rows);
}
var x = 0;
var y = 0;
var item, box, width, height, position;
this.setAutoRefigureSizes(false);
for (var i = 0; i < this._items.length; i++) {
if (i && (i % wrap) === 0) {
if (layout === 'horizontal') {
y += increment;
x = 0;
} else {
x += increment;
y = 0;
}
}
item = this._items[i];
box = item.getBounds();
if (box.width > box.height) {
width = tileSize;
} else {
width = tileSize * (box.width / box.height);
}
height = width * (box.height / box.width);
position = new $.Point(x + ((tileSize - width) / 2),
y + ((tileSize - height) / 2));
item.setPosition(position, immediately);
item.setWidth(width, immediately);
if (layout === 'horizontal') {
x += increment;
} else {
y += increment;
}
}
this.setAutoRefigureSizes(true);
},
// private
_figureSizes: function() {
var oldHomeBounds = this._homeBounds ? this._homeBounds.clone() : null;
var oldContentSize = this._contentSize ? this._contentSize.clone() : null;
var oldContentFactor = this._contentFactor || 0;
if ( !this._items.length ) {
this._homeBounds = new $.Rect(0, 0, 1, 1);
this._contentSize = new $.Point(1, 1);
this._contentFactor = 1;
} else {
var bounds = this._items[0].getBounds();
this._contentFactor = this._items[0].getContentSize().x / bounds.width;
var left = bounds.x;
var top = bounds.y;
var right = bounds.x + bounds.width;
var bottom = bounds.y + bounds.height;
var box;
for ( var i = 1; i < this._items.length; i++ ) {
box = this._items[i].getBounds();
this._contentFactor = Math.max(this._contentFactor, this._items[i].getContentSize().x / box.width);
left = Math.min( left, box.x );
top = Math.min( top, box.y );
right = Math.max( right, box.x + box.width );
bottom = Math.max( bottom, box.y + box.height );
}
this._homeBounds = new $.Rect( left, top, right - left, bottom - top );
this._contentSize = new $.Point(this._homeBounds.width * this._contentFactor,
this._homeBounds.height * this._contentFactor);
}
if (this._contentFactor !== oldContentFactor || !this._homeBounds.equals(oldHomeBounds) ||
!this._contentSize.equals(oldContentSize)) {
/**
* Raised when the home bounds or content factor change.
* @event metrics-change
* @memberOf OpenSeadragon.World
* @type {object}
* @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent('metrics-change', {});
}
},
// private
_raiseRemoveItem: function(item) {
/**
* Raised when an item is removed.
* @event remove-item
* @memberOf OpenSeadragon.World
* @type {object}
* @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.
* @property {OpenSeadragon.TiledImage} item - The item's underlying item.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'remove-item', { item: item } );
}
});
}( OpenSeadragon ));