https://www.mckendree.edu/public/js/jquery.corner.js

1/*!
2 * jQuery corner plugin: simple corner rounding
3 * Examples and documentation at: http://jquery.malsup.com/corner/
4 * version 2.12 (23-MAY-2011)
5 * Requires jQuery v1.3.2 or later
6 * Dual licensed under the MIT and GPL licenses:
7 * http://www.opensource.org/licenses/mit-license.php
8 * http://www.gnu.org/licenses/gpl.html
9 * Authors: Dave Methvin and Mike Alsup
10 */
11
12/**
13 *  corner() takes a single string argument:  $('#myDiv').corner("effect corners width")
14 *
15 *  effect:  name of the effect to apply, such as round, bevel, notch, bite, etc (default is round). 
16 *  corners: one or more of: top, bottom, tr, tl, br, or bl.  (default is all corners)
17 *  width:   width of the effect; in the case of rounded corners this is the radius. 
18 *           specify this value using the px suffix such as 10px (yes, it must be pixels).
19 */
20;(function($) { 
21
22var style = document.createElement('div').style,
23    moz = style['MozBorderRadius'] !== undefined,
24    webkit = style['WebkitBorderRadius'] !== undefined,
25    radius = style['borderRadius'] !== undefined || style['BorderRadius'] !== undefined,
26    mode = document.documentMode || 0,
27    noBottomFold = $.browser.msie && (($.browser.version < 8 && !mode) || mode < 8),
28
29    expr = $.browser.msie && (function() {
30        var div = document.createElement('div');
31        try { div.style.setExpression('width','0+0'); div.style.removeExpression('width'); }
32        catch(e) { return false; }
33        return true;
34    })();
35
36$.support = $.support || {};
37$.support.borderRadius = moz || webkit || radius; // so you can do:  if (!$.support.borderRadius) $('#myDiv').corner();
38
39function sz(el, p) { 
40    return parseInt($.css(el,p))||0; 
41};
42function hex2(s) {
43    s = parseInt(s).toString(16);
44    return ( s.length < 2 ) ? '0'+s : s;
45};
46function gpc(node) {
47    while(node) {
48        var v = $.css(node,'backgroundColor'), rgb;
49        if (v && v != 'transparent' && v != 'rgba(0, 0, 0, 0)') {
50            if (v.indexOf('rgb') >= 0) { 
51                rgb = v.match(/\d+/g); 
52                return '#'+ hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);
53            }
54            return v;
55        }
56        if (node.nodeName.toLowerCase() == 'html')
57            break;
58        node = node.parentNode; // keep walking if transparent
59    }
60    return '#ffffff';
61};
62
63function getWidth(fx, i, width) {
64    switch(fx) {
65    case 'round':  return Math.round(width*(1-Math.cos(Math.asin(i/width))));
66    case 'cool':   return Math.round(width*(1+Math.cos(Math.asin(i/width))));
67    case 'sharp':  return width-i;
68    case 'bite':   return Math.round(width*(Math.cos(Math.asin((width-i-1)/width))));
69    case 'slide':  return Math.round(width*(Math.atan2(i,width/i)));
70    case 'jut':    return Math.round(width*(Math.atan2(width,(width-i-1))));
71    case 'curl':   return Math.round(width*(Math.atan(i)));
72    case 'tear':   return Math.round(width*(Math.cos(i)));
73    case 'wicked': return Math.round(width*(Math.tan(i)));
74    case 'long':   return Math.round(width*(Math.sqrt(i)));
75    case 'sculpt': return Math.round(width*(Math.log((width-i-1),width)));
76    case 'dogfold':
77    case 'dog':    return (i&1) ? (i+1) : width;
78    case 'dog2':   return (i&2) ? (i+1) : width;
79    case 'dog3':   return (i&3) ? (i+1) : width;
80    case 'fray':   return (i%2)*width;
81    case 'notch':  return width; 
82    case 'bevelfold':
83    case 'bevel':  return i+1;
84    case 'steep':  return i/2 + 1;
85    case 'invsteep':return (width-i)/2+1;
86    }
87};
88
89$.fn.corner = function(options) {
90    // in 1.3+ we can fix mistakes with the ready state
91    if (this.length == 0) {
92        if (!$.isReady && this.selector) {
93            var s = this.selector, c = this.context;
94            $(function() {
95                $(s,c).corner(options);
96            });
97        }
98        return this;
99    }
100
101    return this.each(function(index){
102        var $this = $(this),
103            // meta values override options
104            o = [$this.attr($.fn.corner.defaults.metaAttr) || '', options || ''].join(' ').toLowerCase(),
105            keep = /keep/.test(o),                       // keep borders?
106            cc = ((o.match(/cc:(#[0-9a-f]+)/)||[])[1]),  // corner color
107            sc = ((o.match(/sc:(#[0-9a-f]+)/)||[])[1]),  // strip color
108            width = parseInt((o.match(/(\d+)px/)||[])[1]) || 10, // corner width
109            re = /round|bevelfold|bevel|notch|bite|cool|sharp|slide|jut|curl|tear|fray|wicked|sculpt|long|dog3|dog2|dogfold|dog|invsteep|steep/,
110            fx = ((o.match(re)||['round'])[0]),
111            fold = /dogfold|bevelfold/.test(o),
112            edges = { T:0, B:1 },
113            opts = {
114                TL:  /top|tl|left/.test(o),       TR:  /top|tr|right/.test(o),
115                BL:  /bottom|bl|left/.test(o),    BR:  /bottom|br|right/.test(o)
116            },
117            // vars used in func later

118            strip, pad, cssHeight, j, bot, d, ds, bw, i, w, e, c, common, $horz;
119        
120        if ( !opts.TL && !opts.TR && !opts.BL && !opts.BR )
121            opts = { TL:1, TR:1, BL:1, BR:1 };
122            
123        // support native rounding
124        if ($.fn.corner.defaults.useNative && fx == 'round' && (radius || moz || webkit) && !cc && !sc) {
125            if (opts.TL)
126                $this.css(radius ? 'border-top-left-radius' : moz ? '-moz-border-radius-topleft' : '-webkit-border-top-left-radius', width + 'px');
127            if (opts.TR)
128                $this.css(radius ? 'border-top-right-radius' : moz ? '-moz-border-radius-topright' : '-webkit-border-top-right-radius', width + 'px');
129            if (opts.BL)
130                $this.css(radius ? 'border-bottom-left-radius' : moz ? '-moz-border-radius-bottomleft' : '-webkit-border-bottom-left-radius', width + 'px');
131            if (opts.BR)
132                $this.css(radius ? 'border-bottom-right-radius' : moz ? '-moz-border-radius-bottomright' : '-webkit-border-bottom-right-radius', width + 'px');
133            return;
134        }
135            
136        strip = document.createElement('div');
137        $(strip).css({
138            overflow: 'hidden',
139            height: '1px',
140            minHeight: '1px',
141            fontSize: '1px',
142            backgroundColor: sc || 'transparent',
143            borderStyle: 'solid'
144        });
145    
146        pad = {
147            T: parseInt($.css(this,'paddingTop'))||0,     R: parseInt($.css(this,'paddingRight'))||0,
148            B: parseInt($.css(this,'paddingBottom'))||0,  L: parseInt($.css(this,'paddingLeft'))||0
149        };
150
151        if (typeof this.style.zoom != undefined) this.style.zoom = 1; // force 'hasLayout' in IE
152        if (!keep) this.style.border = 'none';
153        strip.style.borderColor = cc || gpc(this.parentNode);
154        cssHeight = $(this).outerHeight();
155
156        for (j in edges) {
157            bot = edges[j];
158            // only add stips if needed
159            if ((bot && (opts.BL || opts.BR)) || (!bot && (opts.TL || opts.TR))) {
160                strip.style.borderStyle = 'none '+(opts[j+'R']?'solid':'none')+' none '+(opts[j+'L']?'solid':'none');
161                d = document.createElement('div');
162                $(d).addClass('jquery-corner');
163                ds = d.style;
164
165                bot ? this.appendChild(d) : this.insertBefore(d, this.firstChild);
166
167                if (bot && cssHeight != 'auto') {
168                    if ($.css(this,'position') == 'static')
169                        this.style.position = 'relative';
170                    ds.position = 'absolute';
171                    ds.bottom = ds.left = ds.padding = ds.margin = '0';
172                    if (expr)
173                        ds.setExpression('width', 'this.parentNode.offsetWidth');
174                    else
175                        ds.width = '100%';
176                }
177                else if (!bot && $.browser.msie) {
178                    if ($.css(this,'position') == 'static')
179                        this.style.position = 'relative';
180                    ds.position = 'absolute';
181                    ds.top = ds.left = ds.right = ds.padding = ds.margin = '0';
182                    
183                    // fix ie6 problem when blocked element has a border width
184                    if (expr) {
185                        bw = sz(this,'borderLeftWidth') + sz(this,'borderRightWidth');
186                        ds.setExpression('width', 'this.parentNode.offsetWidth - '+bw+'+ "px"');
187                    }
188                    else
189                        ds.width = '100%';
190                }
191                else {
192                    ds.position = 'relative';
193                    ds.margin = !bot ? '-'+pad.T+'px -'+pad.R+'px '+(pad.T-width)+'px -'+pad.L+'px' : 
194                                        (pad.B-width)+'px -'+pad.R+'px -'+pad.B+'px -'+pad.L+'px';                
195                }
196
197                for (i=0; i < width; i++) {
198                    w = Math.max(0,getWidth(fx,i, width));
199                    e = strip.cloneNode(false);
200                    e.style.borderWidth = '0 '+(opts[j+'R']?w:0)+'px 0 '+(opts[j+'L']?w:0)+'px';
201                    bot ? d.appendChild(e) : d.insertBefore(e, d.firstChild);
202                }
203                
204                if (fold && $.support.boxModel) {
205                    if (bot && noBottomFold) continue;
206                    for (c in opts) {
207                        if (!opts[c]) continue;
208                        if (bot && (c == 'TL' || c == 'TR')) continue;
209                        if (!bot && (c == 'BL' || c == 'BR')) continue;
210                        
211                        common = { position: 'absolute', border: 'none', margin: 0, padding: 0, overflow: 'hidden', backgroundColor: strip.style.borderColor };

212                        $horz = $('<div/>').css(common).css({ width: width + 'px', height: '1px' });
213                        switch(c) {
214                        case 'TL': $horz.css({ bottom: 0, left: 0 }); break;
215                        case 'TR': $horz.css({ bottom: 0, right: 0 }); break;
216                        case 'BL': $horz.css({ top: 0, left: 0 }); break;
217                        case 'BR': $horz.css({ top: 0, right: 0 }); break;
218                        }
219                        d.appendChild($horz[0]);
220                        
221                        var $vert = $('<div/>').css(common).css({ top: 0, bottom: 0, width: '1px', height: width + 'px' });
222                        switch(c) {
223                        case 'TL': $vert.css({ left: width }); break;
224                        case 'TR': $vert.css({ right: width }); break;
225                        case 'BL': $vert.css({ left: width }); break;
226                        case 'BR': $vert.css({ right: width }); break;
227                        }
228                        d.appendChild($vert[0]);
229                    }
230                }
231            }
232        }
233    });
234};
235
236$.fn.uncorner = function() { 
237    if (radius || moz || webkit)
238        this.css(radius ? 'border-radius' : moz ? '-moz-border-radius' : '-webkit-border-radius', 0);
239    $('div.jquery-corner', this).remove();
240    return this;
241};
242
243// expose options
244$.fn.corner.defaults = {
245    useNative: true, // true if plugin should attempt to use native browser support for border radius rounding
246    metaAttr:  'data-corner' // name of meta attribute to use for options
247};
248    
249})(jQuery);