1 |
|
2 |
|
3 | var hasOwn = require('hasown')
|
4 | var copyUtils = require('copy-utils')
|
5 | var copyList = copyUtils.copyList
|
6 | var F = require('functionally')
|
7 | var isObject = require('i-s').object
|
8 |
|
9 | /**
|
10 | * @class Region
|
11 | *
|
12 | * # z.region
|
13 | *
|
14 | * The Region class is an abstraction that allows the developer to refer to rectangles on the screen,
|
15 | * and move them around, make diffs and unions, detect intersections, compute areas, etc.
|
16 | *
|
17 | * ## Creating a region
|
18 | *
|
19 | *
|
20 | *
|
21 | * var region = require('region')({
|
22 | * top : 10,
|
23 | * left : 10,
|
24 | * bottom: 100,
|
25 | * right : 100
|
26 | * })
|
27 | * //this region is a square, 90x90, starting from (10,10) to (100,100)
|
28 | *
|
29 | * var second = require('region')({ top: 10, left: 100, right: 200, bottom: 60})
|
30 | * var union = region.getUnion(second)
|
31 | *
|
32 | * //the "union" region is a union between "region" and "second"
|
33 | *
|
34 | * ## Element regions
|
35 | *
|
36 | * The {@link Element} class has {@link Element#getRegion} and {@link Element#setRegion} methods, so you can easily
|
37 | * retrieve and set element size and position.
|
38 | *
|
39 | * var bodyElement = Element.select('body'),
|
40 | * bodyRegion = bodyElement.getRegion()
|
41 | *
|
42 | * bodyRegion.setWidth(100).setHeight(200)
|
43 | *
|
44 | * //this makes the body just 100px in width and 200px in height
|
45 | * bodyElement.setRegion(bodyRegion)
|
46 | *
|
47 | * //you can even bind an element to a region
|
48 | *
|
49 | * var reg = bodyElement.getRegion({bound: true})
|
50 | *
|
51 | * reg.setWidth(200) //also sets the width of the bodyElement
|
52 | *
|
53 | */
|
54 |
|
55 | var classy = require('classy')
|
56 | var EventEmitter = require('zemitter').mixin
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57 |
|
58 | var MAX = Math.max,
|
59 | MIN = Math.min,
|
60 | POINT_POSITIONS = {
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61 | cy: 'YCenter',
|
62 | cx: 'XCenter',
|
63 | t : 'Top',
|
64 | tc: 'TopCenter',
|
65 | tl: 'TopLeft',
|
66 | tr: 'TopRight',
|
67 | b : 'Bottom',
|
68 | bc: 'BottomCenter',
|
69 | bl: 'BottomLeft',
|
70 | br: 'BottomRight',
|
71 | l : 'Left',
|
72 | lc: 'LeftCenter',
|
73 | r : 'Right',
|
74 | rc: 'RightCenter',
|
75 | c : 'Center'
|
76 | }
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77 |
|
78 | var REGION = classy.define({
|
79 |
|
80 | forceInstance: true,
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81 |
|
82 | mixins: [
|
83 | EventEmitter
|
84 | ],
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85 |
|
86 | statics: {
|
87 | init: function(){
|
88 | var exportAsNonStatic = {
|
89 | getIntersection : true,
|
90 | getIntersectionArea : true,
|
91 | getIntersectionHeight: true,
|
92 | getIntersectionWidth : true,
|
93 | getUnion : true
|
94 | }
|
95 | var thisProto = this.prototype
|
96 | var newName
|
97 |
|
98 | var exportHasOwn = hasOwn(exportAsNonStatic)
|
99 | var methodName
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100 |
|
101 | for (methodName in exportAsNonStatic) if (exportHasOwn(methodName)) {
|
102 | newName = exportAsNonStatic[methodName]
|
103 | if (typeof newName != 'string'){
|
104 | newName = methodName
|
105 | }
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106 |
|
107 | (function(proto, methodName, protoMethodName){
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108 |
|
109 | proto[methodName] = function(region){
|
110 | //<debug>
|
111 | if (!this.$ownClass[protoMethodName]){
|
112 | console.warn('cannot find method ', protoMethodName,' on ', this.$ownClass)
|
113 | }
|
114 | //</debug>
|
115 | return this.$ownClass[protoMethodName](this, region)
|
116 | }
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117 |
|
118 | })(thisProto, newName, methodName)
|
119 | }
|
120 | },
|
121 |
|
122 | /**
|
123 | * @static
|
124 | * Returns true if the given region is valid, false otherwise.
|
125 | * @param {Region} region The region to check
|
126 | * @return {Boolean} True, if the region is valid, false otherwise.
|
127 | * A region is valid if
|
128 | * * left <= right &&
|
129 | * * top <= bottom
|
130 | */
|
131 | validate: function(region){
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132 |
|
133 | var isValid = true
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134 |
|
135 | if (region.right < region.left){
|
136 | isValid = false
|
137 | region.right = region.left
|
138 | }
|
139 |
|
140 | if (region.bottom < region.top){
|
141 | isValid = false
|
142 | region.bottom = region.top
|
143 | }
|
144 |
|
145 | return isValid
|
146 | },
|
147 |
|
148 | /**
|
149 | * Returns the region corresponding to the documentElement
|
150 | * @return {Region} The region corresponding to the documentElement. This region is the maximum region visible on the screen.
|
151 | */
|
152 | getDocRegion: function(){
|
153 | return REGION.fromDOM(document.documentElement)
|
154 | },
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155 |
|
156 | from: function(reg){
|
157 | if (reg instanceof REGION){
|
158 | return reg
|
159 | }
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160 |
|
161 | if (typeof document){
|
162 | if (typeof HTMLElement && reg instanceof HTMLElement){
|
163 | return REGION.fromDOM(reg)
|
164 | }
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165 |
|
166 | if (typeof Event && reg instanceof Event){
|
167 | return REGION.fromEvent(reg)
|
168 | }
|
169 | }
|
170 |
|
171 | return REGION(reg)
|
172 | },
|
173 |
|
174 | fromEvent: function(event){
|
175 | return REGION.fromPoint({
|
176 | x: event.pageX,
|
177 | y: event.pageY
|
178 | })
|
179 | },
|
180 |
|
181 | fromDOM: function(dom){
|
182 | var rect = dom.getBoundingClientRect()
|
183 | var docElem = document.documentElement
|
184 | var win = window
|
185 |
|
186 | var top = rect.top + win.pageYOffset - docElem.clientTop
|
187 | var left = rect.left + win.pageXOffset - docElem.clientLeft
|
188 |
|
189 | return new REGION({
|
190 | top : rect.top,
|
191 | left : rect.left,
|
192 | bottom: rect.bottom,
|
193 | right : rect.right
|
194 | })
|
195 | },
|
196 |
|
197 | /**
|
198 | * @static
|
199 | * Returns a region that is the intersection of the given two regions
|
200 | * @param {Region} first The first region
|
201 | * @param {Region} second The second region
|
202 | * @return {Region/Boolean} The intersection region or false if no intersection found
|
203 | */
|
204 | getIntersection: function(first, second){
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205 |
|
206 | var area = this.getIntersectionArea(first, second)
|
207 |
|
208 | if (area){
|
209 | return new REGION(area)
|
210 | }
|
211 |
|
212 | return false
|
213 | },
|
214 |
|
215 | getIntersectionWidth: function(first, second){
|
216 | var minRight = MIN(first.right, second.right)
|
217 | var maxLeft = MAX(first.left, second.left)
|
218 |
|
219 | if (maxLeft < minRight){
|
220 | return minRight - maxLeft
|
221 | }
|
222 |
|
223 | return 0
|
224 | },
|
225 |
|
226 | getIntersectionHeight: function(first, second){
|
227 | var maxTop = MAX(first.top, second.top)
|
228 | var minBottom = MIN(first.bottom,second.bottom)
|
229 |
|
230 | if (maxTop < minBottom){
|
231 | return minBottom - maxTop
|
232 | }
|
233 |
|
234 | return 0
|
235 | },
|
236 |
|
237 | getIntersectionArea: function(first, second){
|
238 | var maxTop = MAX(first.top, second.top)
|
239 | var minRight = MIN(first.right, second.right)
|
240 | var minBottom = MIN(first.bottom,second.bottom)
|
241 | var maxLeft = MAX(first.left, second.left)
|
242 |
|
243 | if (
|
244 | maxTop < minBottom &&
|
245 | maxLeft < minRight
|
246 | ){
|
247 | return {
|
248 | top : maxTop,
|
249 | right : minRight,
|
250 | bottom : minBottom,
|
251 | left : maxLeft,
|
252 |
|
253 | width : minRight - maxLeft,
|
254 | height : minBottom - maxTop
|
255 | }
|
256 | }
|
257 |
|
258 | return false
|
259 | },
|
260 |
|
261 | /**
|
262 | * @static
|
263 | * Returns a region that is the union of the given two regions
|
264 | * @param {Region} first The first region
|
265 | * @param {Region} second The second region
|
266 | * @return {Region} The union region. The smallest region that contains both given regions.
|
267 | */
|
268 | getUnion: function(first, second){
|
269 | var top = MIN(first.top, second.top)
|
270 | var right = MAX(first.right, second.right)
|
271 | var bottom = MAX(first.bottom,second.bottom)
|
272 | var left = MIN(first.left, second.left)
|
273 |
|
274 | return new REGION(top, right, bottom, left)
|
275 | },
|
276 |
|
277 | /**
|
278 | * @static
|
279 | * Returns a region. If the reg argument is a region, returns it, otherwise return a new region built from the reg object.
|
280 | *
|
281 | * @param {Region} reg A region or an object with either top, left, bottom, right or
|
282 | * with top, left, width, height
|
283 | * @return {Region} A region
|
284 | */
|
285 | getRegion: function(reg){
|
286 | return REGION.from(reg)
|
287 | },
|
288 |
|
289 | /**
|
290 | * Creates a region that corresponds to a point.
|
291 | *
|
292 | * @param {Object} xy The point
|
293 | * @param {Number} xy.x
|
294 | * @param {Number} xy.y
|
295 | *
|
296 | * @return {Region} The new region, with top==xy.y, bottom = xy.y and left==xy.x, right==xy.x
|
297 | */
|
298 | fromPoint: function(xy){
|
299 | return new REGION({
|
300 | top : xy.y,
|
301 | bottom : xy.y,
|
302 | left : xy.x,
|
303 | right : xy.x
|
304 | })
|
305 | }
|
306 | },
|
307 |
|
308 | /**
|
309 | * @cfg {Boolean} emitChangeEvents If this is set to true, the region
|
310 | * will emit 'changesize' and 'changeposition' whenever the size or the position changs
|
311 | */
|
312 | emitChangeEvents: false,
|
313 |
|
314 | /**
|
315 | * @cfg {Number} changeEventsBuffer If {@link #emitChangeEvents} is true, the change events will be emitted in a buffered manner,
|
316 | * if this value is greater than 0
|
317 | */
|
318 | changeEventsBuffer: 0,
|
319 |
|
320 | /**
|
321 | * Returns this region, or a clone of this region
|
322 | * @param {Boolean} [clone] If true, this method will return a clone of this region
|
323 | * @return {Region} This region, or a clone of this
|
324 | */
|
325 | getRegion: function(clone){
|
326 | return clone?
|
327 | this.clone():
|
328 | this
|
329 | },
|
330 |
|
331 | /**
|
332 | * Sets the properties of this region to those of the given region
|
333 | * @param {Region/Object} reg The region or object to use for setting properties of this region
|
334 | * @return {Region} this
|
335 | */
|
336 | setRegion: function(reg){
|
337 |
|
338 | if (reg instanceof REGION){
|
339 | this.set(reg.get())
|
340 | } else {
|
341 | this.set(reg)
|
342 | }
|
343 |
|
344 | return this
|
345 | },
|
346 |
|
347 | /**
|
348 | * Returns true if this region is valid, false otherwise
|
349 | *
|
350 | * @param {Region} region The region to check
|
351 | * @return {Boolean} True, if the region is valid, false otherwise.
|
352 | * A region is valid if
|
353 | * * left <= right &&
|
354 | * * top <= bottom
|
355 | */
|
356 | validate: function(){
|
357 | return REGION.validate(this)
|
358 | },
|
359 |
|
360 | _before: function(){
|
361 | if (this.emitChangeEvents){
|
362 | return copyList(this, {}, ['left','top','bottom','right'])
|
363 | }
|
364 | },
|
365 |
|
366 | _after: function(before){
|
367 | if (this.emitChangeEvents){
|
368 |
|
369 | if(this.top != before.top || this.left != before.left) {
|
370 | this.emitPositionChange()
|
371 | }
|
372 |
|
373 | if(this.right != before.right || this.bottom != before.bottom) {
|
374 | this.emitSizeChange()
|
375 | }
|
376 | }
|
377 | },
|
378 |
|
379 | notifyPositionChange: function(){
|
380 | this.emit('changeposition', this)
|
381 | },
|
382 |
|
383 | emitPositionChange: function(){
|
384 | if (this.changeEventsBuffer){
|
385 | if (!this.emitPositionChangeBuffered){
|
386 | this.emitPositionChangeBuffered = F.buffer(this.notifyPositionChange, changeEventsBuffer)
|
387 | }
|
388 | this.emitPositionChangeBuffered()
|
389 | }
|
390 |
|
391 | this.notifyPositionChange()
|
392 | },
|
393 |
|
394 | notifySizeChange: function(){
|
395 | this.emit('changesize', this)
|
396 | },
|
397 |
|
398 | emitSizeChange: function(){
|
399 | if (this.changeEventsBuffer){
|
400 | if (!this.emitSizeChangeBuffered){
|
401 | this.emitSizeChangeBuffered = F.buffer(this.notifySizeChange, changeEventsBuffer)
|
402 | }
|
403 | this.emitSizeChangeBuffered()
|
404 | }
|
405 |
|
406 | this.notifySizeChange()
|
407 | },
|
408 |
|
409 | /**
|
410 | * Add the given amounts to each specified side. Example
|
411 | *
|
412 | * region.add({
|
413 | * top: 50, //add 50 px to the top side
|
414 | * bottom: -100 //substract 100 px from the bottom side
|
415 | * })
|
416 | *
|
417 | * @param {Object} directions
|
418 | * @param {Number} [directions.top]
|
419 | * @param {Number} [directions.left]
|
420 | * @param {Number} [directions.bottom]
|
421 | * @param {Number} [directions.right]
|
422 | *
|
423 | * @return {Region} this
|
424 | */
|
425 | add: function(directions){
|
426 |
|
427 | var before = this._before()
|
428 | var direction
|
429 |
|
430 | for (direction in directions) if ( hasOwn(directions, direction) ) {
|
431 | this[direction] += directions[direction]
|
432 | }
|
433 |
|
434 | this[0] = this.left
|
435 | this[1] = this.top
|
436 |
|
437 | this._after(before)
|
438 |
|
439 | return this
|
440 | },
|
441 |
|
442 | /**
|
443 | * The same as {@link #add}, but substracts the given values
|
444 | * @param {Object} directions
|
445 | * @param {Number} [directions.top]
|
446 | * @param {Number} [directions.left]
|
447 | * @param {Number} [directions.bottom]
|
448 | * @param {Number} [directions.right]
|
449 | *
|
450 | * @return {Region} this
|
451 | */
|
452 | substract: function(directions){
|
453 |
|
454 | var before = this._before()
|
455 | var direction
|
456 |
|
457 | for (direction in directions) if (hasOwn(directions, direction) ) {
|
458 | this[direction] -= directions[direction]
|
459 | }
|
460 |
|
461 | this[0] = this.left
|
462 | this[1] = this.top
|
463 |
|
464 | this._after(before)
|
465 |
|
466 | return this
|
467 | },
|
468 |
|
469 | /**
|
470 | * Retrieves the size of the region.
|
471 | * @return {Object} An object with {width, height}, corresponding to the width and height of the region
|
472 | */
|
473 | getSize: function(){
|
474 | return {
|
475 | width : this.getWidth(),
|
476 | height : this.getHeight()
|
477 | }
|
478 | },
|
479 |
|
480 | /**
|
481 | * Move the region to the given position and keeps the region width and height.
|
482 | *
|
483 | * @param {Object} position An object with {top, left} properties. The values in {top,left} are used to move the region by the given amounts.
|
484 | * @param {Number} [position.left]
|
485 | * @param {Number} [position.top]
|
486 | *
|
487 | * @return {Region} this
|
488 | */
|
489 | setPosition: function(position){
|
490 | var width = this.getWidth(),
|
491 | height = this.getHeight()
|
492 |
|
493 | if (position.left){
|
494 | position.right = position.left + width
|
495 | }
|
496 |
|
497 | if (position.top){
|
498 | position.bottom = position.top + height
|
499 | }
|
500 |
|
501 | return this.set(position)
|
502 | },
|
503 |
|
504 | /**
|
505 | * Sets both the height and the width of this region to the given size.
|
506 | *
|
507 | * @param {Number} size The new size for the region
|
508 | * @return {Region} this
|
509 | */
|
510 | setSize: function(size){
|
511 | if (size.height && size.width){
|
512 | return this.set({
|
513 | right : this.left + size.width,
|
514 | bottom : this.top + size.height
|
515 | })
|
516 | }
|
517 |
|
518 | if (size.width){
|
519 | this.setWidth(size.width)
|
520 | }
|
521 |
|
522 | if (size.height){
|
523 | this.setHeight(size.height)
|
524 | }
|
525 |
|
526 | return this
|
527 | },
|
528 |
|
529 | /**
|
530 | * @chainable
|
531 | *
|
532 | * Sets the width of this region
|
533 | * @param {Number} width The new width for this region
|
534 | * @return {Region} this
|
535 | */
|
536 | setWidth: function(width){
|
537 | return this.set({
|
538 | right: this.left + width
|
539 | })
|
540 | },
|
541 |
|
542 | /**
|
543 | * @chainable
|
544 | *
|
545 | * Sets the height of this region
|
546 | * @param {Number} height The new height for this region
|
547 | * @return {Region} this
|
548 | */
|
549 | setHeight: function(height){
|
550 | return this.set({
|
551 | bottom: this.top + height
|
552 | })
|
553 | },
|
554 |
|
555 | /**
|
556 | * Sets the given properties on this region
|
557 | *
|
558 | * @param {Object} directions an object containing top, left, and EITHER bottom, right OR width, height
|
559 | * @param {Number} [directions.top]
|
560 | * @param {Number} [directions.left]
|
561 | *
|
562 | * @param {Number} [directions.bottom]
|
563 | * @param {Number} [directions.right]
|
564 | *
|
565 | * @param {Number} [directions.width]
|
566 | * @param {Number} [directions.height]
|
567 | *
|
568 | *
|
569 | * @return {Region} this
|
570 | */
|
571 | set: function(directions){
|
572 | var before = this._before()
|
573 |
|
574 | copyList(directions, this, ['left','top','bottom','right'])
|
575 |
|
576 | if (directions.bottom == null && directions.height != null){
|
577 | this.bottom = this.top + directions.height
|
578 | }
|
579 | if (directions.right == null && directions.width != null){
|
580 | this.right = this.left + directions.width
|
581 | }
|
582 |
|
583 | this[0] = this.left
|
584 | this[1] = this.top
|
585 |
|
586 | this._after(before)
|
587 |
|
588 | return this
|
589 | },
|
590 |
|
591 | /**
|
592 | * Retrieves the given property from this region. If no property is given, return an object
|
593 | * with {left, top, right, bottom}
|
594 | *
|
595 | * @param {String} [dir] the property to retrieve from this region
|
596 | * @return {Number/Object}
|
597 | */
|
598 | get: function(dir){
|
599 | return dir? this[dir]:
|
600 | copyList(this, {}, ['left','right','top','bottom'])
|
601 | },
|
602 |
|
603 | /**
|
604 | * Shifts this region to either top, or left or both.
|
605 | * Shift is similar to {@link #add} by the fact that it adds the given dimensions to top/left sides, but also adds the given dimensions
|
606 | * to bottom and right
|
607 | *
|
608 | * @param {Object} directions
|
609 | * @param {Number} [directions.top]
|
610 | * @param {Number} [directions.left]
|
611 | *
|
612 | * @return {Region} this
|
613 | */
|
614 | shift: function(directions){
|
615 |
|
616 | var before = this._before()
|
617 |
|
618 | if (directions.top){
|
619 | this.top += directions.top
|
620 | this.bottom += directions.top
|
621 | }
|
622 |
|
623 | if (directions.left){
|
624 | this.left += directions.left
|
625 | this.right += directions.left
|
626 | }
|
627 |
|
628 | this[0] = this.left
|
629 | this[1] = this.top
|
630 |
|
631 | this._after(before)
|
632 |
|
633 | return this
|
634 | },
|
635 |
|
636 | /**
|
637 | * Same as {@link #shift}, but substracts the given values
|
638 | * @chainable
|
639 | *
|
640 | * @param {Object} directions
|
641 | * @param {Number} [directions.top]
|
642 | * @param {Number} [directions.left]
|
643 | *
|
644 | * @return {Region} this
|
645 | */
|
646 | unshift: function(directions){
|
647 |
|
648 | if (directions.top){
|
649 | directions.top *= -1
|
650 | }
|
651 |
|
652 | if (directions.left){
|
653 | directions.left *= -1
|
654 | }
|
655 |
|
656 | return this.shift(directions)
|
657 | },
|
658 |
|
659 | /**
|
660 | * Compare this region and the given region. Return true if they have all the same size and position
|
661 | * @param {Region} region The region to compare with
|
662 | * @return {Boolean} True if this and region have same size and position
|
663 | */
|
664 | equals: function(region){
|
665 | return this.equalsPosition(region) && this.equalsSize(region)
|
666 | },
|
667 |
|
668 | /**
|
669 | * Returns true if this region has the same bottom,right properties as the given region
|
670 | * @param {Region/Object} size The region to compare against
|
671 | * @return {Boolean} true if this region is the same size as the given size
|
672 | */
|
673 | equalsSize: function(size){
|
674 | var isInstance = size instanceof REGION
|
675 |
|
676 | var s = {
|
677 | width: size.width == null && isInstance?
|
678 | size.getWidth():
|
679 | size.width,
|
680 |
|
681 | height: size.height == null && isInstance?
|
682 | size.getHeight():
|
683 | size.height
|
684 | }
|
685 | return this.getWidth() == s.width && this.getHeight() == s.height
|
686 | },
|
687 |
|
688 | /**
|
689 | * Returns true if this region has the same top,left properties as the given region
|
690 | * @param {Region} region The region to compare against
|
691 | * @return {Boolean} true if this.top == region.top and this.left == region.left
|
692 | */
|
693 | equalsPosition: function(region){
|
694 | return this.top == region.top && this.left == region.left
|
695 | },
|
696 |
|
697 | /**
|
698 | * Adds the given ammount to the left side of this region
|
699 | * @param {Number} left The ammount to add
|
700 | * @return {Region} this
|
701 | */
|
702 | addLeft: function(left){
|
703 | var before = this._before()
|
704 |
|
705 | this.left = this[0] = this.left + left
|
706 |
|
707 | this._after(before)
|
708 |
|
709 | return this
|
710 | },
|
711 |
|
712 | /**
|
713 | * Adds the given ammount to the top side of this region
|
714 | * @param {Number} top The ammount to add
|
715 | * @return {Region} this
|
716 | */
|
717 | addTop: function(top){
|
718 | var before = this._before()
|
719 |
|
720 | this.top = this[1] = this.top + top
|
721 |
|
722 | this._after(before)
|
723 |
|
724 | return this
|
725 | },
|
726 |
|
727 | /**
|
728 | * Adds the given ammount to the bottom side of this region
|
729 | * @param {Number} bottom The ammount to add
|
730 | * @return {Region} this
|
731 | */
|
732 | addBottom: function(bottom){
|
733 | var before = this._before()
|
734 |
|
735 | this.bottom += bottom
|
736 |
|
737 | this._after(before)
|
738 |
|
739 | return this
|
740 | },
|
741 |
|
742 | /**
|
743 | * Adds the given ammount to the right side of this region
|
744 | * @param {Number} right The ammount to add
|
745 | * @return {Region} this
|
746 | */
|
747 | addRight: function(right){
|
748 | var before = this._before()
|
749 |
|
750 | this.right += right
|
751 |
|
752 | this._after(before)
|
753 |
|
754 | return this
|
755 | },
|
756 |
|
757 | /**
|
758 | * Minimize the top side.
|
759 | * @return {Region} this
|
760 | */
|
761 | minTop: function(){
|
762 | return this.expand({top: 1})
|
763 | },
|
764 | /**
|
765 | * Minimize the bottom side.
|
766 | * @return {Region} this
|
767 | */
|
768 | maxBottom: function(){
|
769 | return this.expand({bottom: 1})
|
770 | },
|
771 | /**
|
772 | * Minimize the left side.
|
773 | * @return {Region} this
|
774 | */
|
775 | minLeft: function(){
|
776 | return this.expand({left: 1})
|
777 | },
|
778 | /**
|
779 | * Maximize the right side.
|
780 | * @return {Region} this
|
781 | */
|
782 | maxRight: function(){
|
783 | return this.expand({right: 1})
|
784 | },
|
785 |
|
786 | /**
|
787 | * Expands this region to the dimensions of the given region, or the document region, if no region is expanded.
|
788 | * But only expand the given sides (any of the four can be expanded).
|
789 | *
|
790 | * @param {Object} directions
|
791 | * @param {Boolean} [directions.top]
|
792 | * @param {Boolean} [directions.bottom]
|
793 | * @param {Boolean} [directions.left]
|
794 | * @param {Boolean} [directions.right]
|
795 | *
|
796 | * @param {Region} [region] the region to expand to, defaults to the document region
|
797 | * @return {Region} this region
|
798 | */
|
799 | expand: function(directions, region){
|
800 | var docRegion = region || REGION.getDocRegion(),
|
801 | list = [],
|
802 | direction,
|
803 | before = this._before()
|
804 |
|
805 | for (direction in directions) if ( hasOwn(directions, direction) ) {
|
806 | list.push(direction)
|
807 | }
|
808 |
|
809 | copyList(docRegion, this, list)
|
810 |
|
811 | this[0] = this.left
|
812 | this[1] = this.top
|
813 |
|
814 | this._after(before)
|
815 |
|
816 | return this
|
817 | },
|
818 |
|
819 | /**
|
820 | * Returns a clone of this region
|
821 | * @return {Region} A new region, with the same position and dimension as this region
|
822 | */
|
823 | clone: function(){
|
824 | return new REGION({
|
825 | top : this.top,
|
826 | left : this.left,
|
827 | right : this.right,
|
828 | bottom : this.bottom
|
829 | })
|
830 | },
|
831 |
|
832 | /**
|
833 | * Returns true if this region contains the given point
|
834 | * @param {Number/Object} x the x coordinate of the point
|
835 | * @param {Number} [y] the y coordinate of the point
|
836 | *
|
837 | * @return {Boolean} true if this region constains the given point, false otherwise
|
838 | */
|
839 | containsPoint: function(x, y){
|
840 | if (arguments.length == 1){
|
841 | y = x.y
|
842 | x = x.x
|
843 | }
|
844 |
|
845 | return this.left <= x &&
|
846 | x <= this.right &&
|
847 | this.top <= y &&
|
848 | y <= this.bottom
|
849 | },
|
850 |
|
851 | /**
|
852 | *
|
853 | * @param region
|
854 | *
|
855 | * @return {Boolean} true if this region contains the given region, false otherwise
|
856 | */
|
857 | containsRegion: function(region){
|
858 | return this.containsPoint(region.left, region.top) &&
|
859 | this.containsPoint(region.right, region.bottom)
|
860 | },
|
861 |
|
862 | /**
|
863 | * Returns an object with the difference for {top, bottom} positions betwen this and the given region,
|
864 | *
|
865 | * See {@link #diff}
|
866 | * @param {Region} region The region to use for diff
|
867 | * @return {Object} {top,bottom}
|
868 | */
|
869 | diffHeight: function(region){
|
870 | return this.diff(region, {top: true, bottom: true})
|
871 | },
|
872 |
|
873 | /**
|
874 | * Returns an object with the difference for {left, right} positions betwen this and the given region,
|
875 | *
|
876 | * See {@link #diff}
|
877 | * @param {Region} region The region to use for diff
|
878 | * @return {Object} {left,right}
|
879 | */
|
880 | diffWidth: function(region){
|
881 | return this.diff(region, {left: true, right: true})
|
882 | },
|
883 |
|
884 | /**
|
885 | * Returns an object with the difference in sizes for the given directions, between this and region
|
886 | *
|
887 | * @param {Region} region The region to use for diff
|
888 | * @param {Object} directions An object with the directions to diff. Can have any of the following keys:
|
889 | * * left
|
890 | * * right
|
891 | * * top
|
892 | * * bottom
|
893 | *
|
894 | * @return {Object} and object with the same keys as the directions object, but the values being the
|
895 | * differences between this region and the given region
|
896 | */
|
897 | diff: function(region, directions){
|
898 | var result = {}
|
899 | var dirName
|
900 |
|
901 | for (dirName in directions) if ( hasOwn(directions, dirName) ) {
|
902 | result[dirName] = this[dirName] - region[dirName]
|
903 | }
|
904 |
|
905 | return result
|
906 | },
|
907 |
|
908 | /**
|
909 | * Returns the position, in {left,top} properties, of this region
|
910 | *
|
911 | * @return {Object} {left,top}
|
912 | */
|
913 | getPosition: function(){
|
914 | return {
|
915 | left: this.left,
|
916 | top : this.top
|
917 | }
|
918 | },
|
919 |
|
920 | /**
|
921 | * Returns the point at the given position from this region.
|
922 | *
|
923 | * @param {String} position Any of:
|
924 | *
|
925 | * * 'cx' - See {@link #getPointXCenter}
|
926 | * * 'cy' - See {@link #getPointYCenter}
|
927 | * * 'b' - See {@link #getPointBottom}
|
928 | * * 'bc' - See {@link #getPointBottomCenter}
|
929 | * * 'l' - See {@link #getPointLeft}
|
930 | * * 'lc' - See {@link #getPointLeftCenter}
|
931 | * * 't' - See {@link #getPointTop}
|
932 | * * 'tc' - See {@link #getPointTopCenter}
|
933 | * * 'r' - See {@link #getPointRight}
|
934 | * * 'rc' - See {@link #getPointRightCenter}
|
935 | * * 'c' - See {@link #getPointCenter}
|
936 | * * 'tl' - See {@link #getPointTopLeft}
|
937 | * * 'bl' - See {@link #getPointBottomLeft}
|
938 | * * 'br' - See {@link #getPointBottomRight}
|
939 | * * 'tr' - See {@link #getPointTopRight}
|
940 | *
|
941 | * @param {Boolean} asLeftTop
|
942 | *
|
943 | * @return {Object} either an object with {x,y} or {left,top} if asLeftTop is true
|
944 | */
|
945 | getPoint: function(position, asLeftTop){
|
946 |
|
947 | //<debug>
|
948 | if (!POINT_POSITIONS[position]) {
|
949 | console.warn('The position ', position, ' could not be found! Available options are tl, bl, tr, br, l, r, t, b.');
|
950 | }
|
951 | //</debug>
|
952 |
|
953 | var method = 'getPoint' + POINT_POSITIONS[position],
|
954 | result = this[method]()
|
955 |
|
956 | if (asLeftTop){
|
957 | return {
|
958 | left : result.x,
|
959 | top : result.y
|
960 | }
|
961 | }
|
962 |
|
963 | return result
|
964 | },
|
965 |
|
966 | /**
|
967 | * Returns a point with x = null and y being the middle of the left region segment
|
968 | * @return {Object} {x,y}
|
969 | */
|
970 | getPointYCenter: function(){
|
971 | return { x: null, y: this.top + this.getHeight() / 2 }
|
972 | },
|
973 |
|
974 | /**
|
975 | * Returns a point with y = null and x being the middle of the top region segment
|
976 | * @return {Object} {x,y}
|
977 | */
|
978 | getPointXCenter: function(){
|
979 | return { x: this.left + this.getWidth() / 2, y: null }
|
980 | },
|
981 |
|
982 | /**
|
983 | * Returns a point with x = null and y the region top position on the y axis
|
984 | * @return {Object} {x,y}
|
985 | */
|
986 | getPointTop: function(){
|
987 | return { x: null, y: this.top }
|
988 | },
|
989 |
|
990 | /**
|
991 | * Returns a point that is the middle point of the region top segment
|
992 | * @return {Object} {x,y}
|
993 | */
|
994 | getPointTopCenter: function(){
|
995 | return { x: this.left + this.getWidth() / 2, y: this.top }
|
996 | },
|
997 |
|
998 | /**
|
999 | * Returns a point that is the top-left point of the region
|
1000 | * @return {Object} {x,y}
|
1001 | */
|
1002 | getPointTopLeft: function(){
|
1003 | return { x: this.left, y: this.top}
|
1004 | },
|
1005 |
|
1006 | /**
|
1007 | * Returns a point that is the top-right point of the region
|
1008 | * @return {Object} {x,y}
|
1009 | */
|
1010 | getPointTopRight: function(){
|
1011 | return { x: this.right, y: this.top}
|
1012 | },
|
1013 |
|
1014 | /**
|
1015 | * Returns a point with x = null and y the region bottom position on the y axis
|
1016 | * @return {Object} {x,y}
|
1017 | */
|
1018 | getPointBottom: function(){
|
1019 | return { x: null, y: this.bottom }
|
1020 | },
|
1021 |
|
1022 | /**
|
1023 | * Returns a point that is the middle point of the region bottom segment
|
1024 | * @return {Object} {x,y}
|
1025 | */
|
1026 | getPointBottomCenter: function(){
|
1027 | return { x: this.left + this.getWidth() / 2, y: this.bottom }
|
1028 | },
|
1029 |
|
1030 | /**
|
1031 | * Returns a point that is the bottom-left point of the region
|
1032 | * @return {Object} {x,y}
|
1033 | */
|
1034 | getPointBottomLeft: function(){
|
1035 | return { x: this.left, y: this.bottom}
|
1036 | },
|
1037 |
|
1038 | /**
|
1039 | * Returns a point that is the bottom-right point of the region
|
1040 | * @return {Object} {x,y}
|
1041 | */
|
1042 | getPointBottomRight: function(){
|
1043 | return { x: this.right, y: this.bottom}
|
1044 | },
|
1045 |
|
1046 | /**
|
1047 | * Returns a point with y = null and x the region left position on the x axis
|
1048 | * @return {Object} {x,y}
|
1049 | */
|
1050 | getPointLeft: function(){
|
1051 | return { x: this.left, y: null }
|
1052 | },
|
1053 |
|
1054 | /**
|
1055 | * Returns a point that is the middle point of the region left segment
|
1056 | * @return {Object} {x,y}
|
1057 | */
|
1058 | getPointLeftCenter: function(){
|
1059 | return { x: this.left, y: this.top + this.getHeight() / 2 }
|
1060 | },
|
1061 |
|
1062 | /**
|
1063 | * Returns a point with y = null and x the region right position on the x axis
|
1064 | * @return {Object} {x,y}
|
1065 | */
|
1066 | getPointRight: function(){
|
1067 | return { x: this.right, y: null }
|
1068 | },
|
1069 |
|
1070 | /**
|
1071 | * Returns a point that is the middle point of the region right segment
|
1072 | * @return {Object} {x,y}
|
1073 | */
|
1074 | getPointRightCenter: function(){
|
1075 | return { x: this.right, y: this.top + this.getHeight() / 2 }
|
1076 | },
|
1077 |
|
1078 | /**
|
1079 | * Returns a point that is the center of the region
|
1080 | * @return {Object} {x,y}
|
1081 | */
|
1082 | getPointCenter: function(){
|
1083 | return { x: this.left + this.getWidth() / 2, y: this.top + this.getHeight() / 2 }
|
1084 | },
|
1085 |
|
1086 | /**
|
1087 | * @return {Number} returns the height of the region
|
1088 | */
|
1089 | getHeight: function(){
|
1090 | return this.bottom - this.top
|
1091 | },
|
1092 |
|
1093 | /**
|
1094 | * @return {Number} returns the width of the region
|
1095 | */
|
1096 | getWidth: function(){
|
1097 | return this.right - this.left
|
1098 | },
|
1099 |
|
1100 | /**
|
1101 | * @return {Number} returns the top property of the region
|
1102 | */
|
1103 | getTop: function(){
|
1104 | return this.top
|
1105 | },
|
1106 |
|
1107 | /**
|
1108 | * @return {Number} returns the left property of the region
|
1109 | */
|
1110 | getLeft: function(){
|
1111 | return this.left
|
1112 | },
|
1113 |
|
1114 | /**
|
1115 | * @return {Number} returns the bottom property of the region
|
1116 | */
|
1117 | getBottom: function(){
|
1118 | return this.bottom
|
1119 | },
|
1120 |
|
1121 | /**
|
1122 | * @return {Number} returns the right property of the region
|
1123 | */
|
1124 | getRight: function(){
|
1125 | return this.right
|
1126 | },
|
1127 |
|
1128 | /**
|
1129 | * Returns the area of the region
|
1130 | * @return {Number} the computed area
|
1131 | */
|
1132 | getArea: function(){
|
1133 | return this.getWidth() * this.getHeight()
|
1134 | },
|
1135 |
|
1136 | constrainTo: function(contrain){
|
1137 | var intersect = this.getIntersection(contrain),
|
1138 | shift
|
1139 |
|
1140 | if (!intersect || !intersect.equals(this)){
|
1141 |
|
1142 | var contrainWidth = contrain.getWidth(),
|
1143 | contrainHeight = contrain.getHeight(),
|
1144 |
|
1145 | shift = {}
|
1146 |
|
1147 | if (this.getWidth() > contrainWidth){
|
1148 | this.left = contrain.left
|
1149 | this.setWidth(contrainWidth)
|
1150 | }
|
1151 |
|
1152 | if (this.getHeight() > contrainHeight){
|
1153 | this.top = contrain.top
|
1154 | this.setHeight(contrainHeight)
|
1155 | }
|
1156 |
|
1157 | shift = {}
|
1158 |
|
1159 | if (this.right > contrain.right){
|
1160 | shift.left = contrain.right - this.right
|
1161 | }
|
1162 |
|
1163 | if (this.bottom > contrain.bottom){
|
1164 | shift.top = contrain.bottom - this.bottom
|
1165 | }
|
1166 |
|
1167 | if (this.left < contrain.left){
|
1168 | shift.left = contrain.left - this.left
|
1169 | }
|
1170 |
|
1171 | if (this.top < contrain.top){
|
1172 | shift.top = contrain.top - this.top
|
1173 | }
|
1174 |
|
1175 | this.shift(shift)
|
1176 |
|
1177 | return true
|
1178 | }
|
1179 |
|
1180 | return false
|
1181 | },
|
1182 |
|
1183 | /**
|
1184 | * @constructor
|
1185 | *
|
1186 | * Construct a new Region.
|
1187 | *
|
1188 | * Example:
|
1189 | *
|
1190 | * var r = root.create('z.region', { top: 10, left: 20, bottom: 100, right: 200 })
|
1191 | *
|
1192 | * //or, the same, but with numbers
|
1193 | *
|
1194 | * r = root.create('z.region', 10, 200, 100, 20)
|
1195 | *
|
1196 | * //or, with width and height
|
1197 | *
|
1198 | * r = root.create('z.region', { top: 10, left: 20, width: 180, height: 90})
|
1199 | *
|
1200 | * @param {Number|Object} top The top pixel position, or an object with top, left, bottom, right properties. If an object is passed,
|
1201 | * instead of having bottom and right, it can have width and height.
|
1202 | *
|
1203 | * @param {Number} right The right pixel position
|
1204 | * @param {Number} bottom The bottom pixel position
|
1205 | * @param {Number} left The left pixel position
|
1206 | *
|
1207 | * @return {Region} this
|
1208 | */
|
1209 | init: function(top, right, bottom, left){
|
1210 |
|
1211 | if (isObject(top)){
|
1212 | copyList(top, this, ['top','right','bottom','left'])
|
1213 |
|
1214 | if (top.bottom == null && top.height != null){
|
1215 | this.bottom = this.top + top.height
|
1216 | }
|
1217 | if (top.right == null && top.width != null){
|
1218 | this.right = this.left + top.width
|
1219 | }
|
1220 |
|
1221 | if (top.emitChangeEvents){
|
1222 | this.emitChangeEvents = top.emitChangeEvents
|
1223 | }
|
1224 | } else {
|
1225 | this.top = top
|
1226 | this.right = right
|
1227 | this.bottom = bottom
|
1228 | this.left = left
|
1229 | }
|
1230 |
|
1231 | this[0] = this.left
|
1232 | this[1] = this.top
|
1233 |
|
1234 | REGION.validate(this)
|
1235 | },
|
1236 |
|
1237 | /**
|
1238 | * @property {Number} top
|
1239 | */
|
1240 |
|
1241 | /**
|
1242 | * @property {Number} right
|
1243 | */
|
1244 |
|
1245 | /**
|
1246 | * @property {Number} bottom
|
1247 | */
|
1248 |
|
1249 | /**
|
1250 | * @property {Number} left
|
1251 | */
|
1252 |
|
1253 | /**
|
1254 | * @property {Number} [0] the top property
|
1255 | */
|
1256 |
|
1257 | /**
|
1258 | * @property {Number} [1] the left property
|
1259 | */
|
1260 |
|
1261 | /**
|
1262 | * @method getIntersection
|
1263 | * Returns a region that is the intersection of this region and the given region
|
1264 | * @param {Region} region The region to intersect with
|
1265 | * @return {Region} The intersection region
|
1266 | */
|
1267 |
|
1268 | /**
|
1269 | * @method getUnion
|
1270 | * Returns a region that is the union of this region with the given region
|
1271 | * @param {Region} region The region to make union with
|
1272 | * @return {Region} The union region. The smallest region that contains both this and the given region.
|
1273 | */
|
1274 |
|
1275 | })
|
1276 |
|
1277 | // require('./align')(REGION)
|
1278 |
|
1279 | module.exports = REGION |
\ | No newline at end of file |