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
|
if ( document.documentElement["getBoundingClientRect"] )
jQuery.fn.offset = function() {
if ( !this[0] ) return { top: 0, left: 0 };
if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] );
var box = this[0].getBoundingClientRect(), doc = this[0].ownerDocument, body = doc.body, docElem = doc.documentElement,
clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
top = box.top + (self.pageYOffset || jQuery.boxModel && docElem.scrollTop || body.scrollTop ) - clientTop,
left = box.left + (self.pageXOffset || jQuery.boxModel && docElem.scrollLeft || body.scrollLeft) - clientLeft;
return { top: top, left: left };
};
else
jQuery.fn.offset = function() {
if ( !this[0] ) return { top: 0, left: 0 };
if ( this[0] === this[0].ownerDocument.body ) return jQuery.offset.bodyOffset( this[0] );
jQuery.offset.initialized || jQuery.offset.initialize();
var elem = this[0], offsetParent = elem.offsetParent, prevOffsetParent = elem,
doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
body = doc.body, defaultView = doc.defaultView,
prevComputedStyle = defaultView.getComputedStyle(elem, null),
top = elem.offsetTop, left = elem.offsetLeft;
while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
computedStyle = defaultView.getComputedStyle(elem, null);
top -= elem.scrollTop, left -= elem.scrollLeft;
if ( elem === offsetParent ) {
top += elem.offsetTop, left += elem.offsetLeft;
if ( jQuery.offset.doesNotAddBorder && !(jQuery.offset.doesAddBorderForTableAndCells && /^t(able|d|h)$/i.test(elem.tagName)) )
top += parseInt( computedStyle.borderTopWidth, 10) || 0,
left += parseInt( computedStyle.borderLeftWidth, 10) || 0;
prevOffsetParent = offsetParent, offsetParent = elem.offsetParent;
}
if ( jQuery.offset.subtractsBorderForOverflowNotVisible && computedStyle.overflow !== "visible" )
top += parseInt( computedStyle.borderTopWidth, 10) || 0,
left += parseInt( computedStyle.borderLeftWidth, 10) || 0;
prevComputedStyle = computedStyle;
}
if ( prevComputedStyle.position === "relative" || prevComputedStyle.position === "static" )
top += body.offsetTop,
left += body.offsetLeft;
if ( prevComputedStyle.position === "fixed" )
top += Math.max(docElem.scrollTop, body.scrollTop),
left += Math.max(docElem.scrollLeft, body.scrollLeft);
return { top: top, left: left };
};
jQuery.offset = {
initialize: function() {
if ( this.initialized ) return;
var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, rules, prop, bodyMarginTop = body.style.marginTop,
html = '<div style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;"><div></div></div><table style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;"cellpadding="0"cellspacing="0"><tr><td></td></tr></table>';
rules = { position: 'absolute', top: 0, left: 0, margin: 0, border: 0, width: '1px', height: '1px', visibility: 'hidden' }
for ( prop in rules ) container.style[prop] = rules[prop];
container.innerHTML = html;
body.insertBefore(container, body.firstChild);
innerDiv = container.firstChild, checkDiv = innerDiv.firstChild, td = innerDiv.nextSibling.firstChild.firstChild;
this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
body.style.marginTop = '1px';
this.doesNotIncludeMarginInBodyOffset = (body.offsetTop === 0);
body.style.marginTop = bodyMarginTop;
body.removeChild(container);
this.initialized = true;
},
bodyOffset: function(body) {
jQuery.offset.initialized || jQuery.offset.initialize();
var top = body.offsetTop, left = body.offsetLeft;
if ( jQuery.offset.doesNotIncludeMarginInBodyOffset )
top += parseInt( jQuery.curCSS(body, 'marginTop', true), 10 ) || 0,
left += parseInt( jQuery.curCSS(body, 'marginLeft', true), 10 ) || 0;
return { top: top, left: left };
}
};
jQuery.fn.extend({
position: function() {
var left = 0, top = 0, results;
if ( this[0] ) {
// Get *real* offsetParent
var offsetParent = this.offsetParent(),
// Get correct offsets
offset = this.offset(),
parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset();
// Subtract element margins
// note: when an element has margin: auto the offsetLeft and marginLeft
// are the same in Safari causing offset.left to incorrectly be 0
offset.top -= num( this, 'marginTop' );
offset.left -= num( this, 'marginLeft' );
// Add offsetParent borders
parentOffset.top += num( offsetParent, 'borderTopWidth' );
parentOffset.left += num( offsetParent, 'borderLeftWidth' );
// Subtract the two offsets
results = {
top: offset.top - parentOffset.top,
left: offset.left - parentOffset.left
};
}
return results;
},
offsetParent: function() {
var offsetParent = this[0].offsetParent || document.body;
while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && jQuery.css(offsetParent, 'position') == 'static') )
offsetParent = offsetParent.offsetParent;
return jQuery(offsetParent);
}
});
// Create scrollLeft and scrollTop methods
jQuery.each( ['Left', 'Top'], function(i, name) {
var method = 'scroll' + name;
jQuery.fn[ method ] = function(val) {
if (!this[0]) return;
return val != undefined ?
// Set the scroll offset
this.each(function() {
this == window || this == document ?
window.scrollTo(
!i ? val : jQuery(window).scrollLeft(),
i ? val : jQuery(window).scrollTop()
) :
this[ method ] = val;
}) :
// Return the scroll offset
this[0] == window || this[0] == document ?
self[ i ? 'pageYOffset' : 'pageXOffset' ] ||
jQuery.boxModel && document.documentElement[ method ] ||
document.body[ method ] :
this[0][ method ];
};
});
|
