| 1 | /*! |
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| 2 | * Ext JS Library 3.0.0 |
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| 3 | * Copyright(c) 2006-2009 Ext JS, LLC |
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| 4 | * licensing@extjs.com |
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| 5 | * http://www.extjs.com/license |
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| 6 | */ |
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| 7 | Ext.lib.Region = function(t, r, b, l) { |
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| 8 | var me = this; |
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| 9 | me.top = t; |
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| 10 | me[1] = t; |
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| 11 | me.right = r; |
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| 12 | me.bottom = b; |
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| 13 | me.left = l; |
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| 14 | me[0] = l; |
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| 15 | }; |
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| 16 | |
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| 17 | Ext.lib.Region.prototype = { |
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| 18 | contains : function(region) { |
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| 19 | var me = this; |
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| 20 | return ( region.left >= me.left && |
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| 21 | region.right <= me.right && |
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| 22 | region.top >= me.top && |
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| 23 | region.bottom <= me.bottom ); |
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| 24 | |
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| 25 | }, |
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| 26 | |
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| 27 | getArea : function() { |
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| 28 | var me = this; |
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| 29 | return ( (me.bottom - me.top) * (me.right - me.left) ); |
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| 30 | }, |
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| 31 | |
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| 32 | intersect : function(region) { |
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| 33 | var me = this, |
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| 34 | t = Math.max(me.top, region.top), |
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| 35 | r = Math.min(me.right, region.right), |
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| 36 | b = Math.min(me.bottom, region.bottom), |
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| 37 | l = Math.max(me.left, region.left); |
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| 38 | |
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| 39 | if (b >= t && r >= l) { |
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| 40 | return new Ext.lib.Region(t, r, b, l); |
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| 41 | } |
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| 42 | }, |
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| 43 | |
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| 44 | union : function(region) { |
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| 45 | var me = this, |
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| 46 | t = Math.min(me.top, region.top), |
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| 47 | r = Math.max(me.right, region.right), |
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| 48 | b = Math.max(me.bottom, region.bottom), |
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| 49 | l = Math.min(me.left, region.left); |
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| 50 | |
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| 51 | return new Ext.lib.Region(t, r, b, l); |
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| 52 | }, |
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| 53 | |
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| 54 | constrainTo : function(r) { |
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| 55 | var me = this; |
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| 56 | me.top = me.top.constrain(r.top, r.bottom); |
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| 57 | me.bottom = me.bottom.constrain(r.top, r.bottom); |
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| 58 | me.left = me.left.constrain(r.left, r.right); |
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| 59 | me.right = me.right.constrain(r.left, r.right); |
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| 60 | return me; |
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| 61 | }, |
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| 62 | |
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| 63 | adjust : function(t, l, b, r) { |
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| 64 | var me = this; |
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| 65 | me.top += t; |
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| 66 | me.left += l; |
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| 67 | me.right += r; |
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| 68 | me.bottom += b; |
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| 69 | return me; |
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| 70 | } |
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| 71 | }; |
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| 72 | |
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| 73 | Ext.lib.Region.getRegion = function(el) { |
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| 74 | var p = Ext.lib.Dom.getXY(el), |
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| 75 | t = p[1], |
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| 76 | r = p[0] + el.offsetWidth, |
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| 77 | b = p[1] + el.offsetHeight, |
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| 78 | l = p[0]; |
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| 79 | |
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| 80 | return new Ext.lib.Region(t, r, b, l); |
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| 81 | }; |
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