2 * Plugin that automatically truncates the plain text contents of an element and adds an ellipsis
6 // Cache ellipsed substrings for every string-width-position combination
8 // Use a seperate cache when match highlighting is enabled
9 var matchTextCache
= { };
11 $.fn
.autoEllipsis = function( options
) {
19 $(this).each( function() {
21 if ( options
.restoreText
) {
22 if ( !$el
.data( 'autoEllipsis.originalText' ) ) {
23 $el
.data( 'autoEllipsis.originalText', $el
.text() );
25 $el
.text( $el
.data( 'autoEllipsis.originalText' ) );
29 // container element - used for measuring against
31 // trimmable text element - only the text within this element will be trimmed
32 var $trimmableText
= null;
33 // protected text element - the width of this element is counted, but next is never trimmed from it
34 var $protectedText
= null;
36 if ( options
.hasSpan
) {
37 $trimmableText
= $el
.children( options
.selector
);
39 $trimmableText
= $( '<span />' )
40 .css( 'whiteSpace', 'nowrap' )
44 .append( $trimmableText
);
47 var text
= $container
.text();
48 var trimmableText
= $trimmableText
.text();
49 var w
= $container
.width();
50 var pw
= $protectedText
? $protectedText
.width() : 0;
52 if ( options
.matchText
) {
53 if ( !( text
in matchTextCache
) ) {
54 matchTextCache
[text
] = {};
56 if ( !( options
.matchText
in matchTextCache
[text
] ) ) {
57 matchTextCache
[text
][options
.matchText
] = {};
59 if ( !( w
in matchTextCache
[text
][options
.matchText
] ) ) {
60 matchTextCache
[text
][options
.matchText
][w
] = {};
62 if ( options
.position
in matchTextCache
[text
][options
.matchText
][w
] ) {
63 $container
.html( matchTextCache
[text
][options
.matchText
][w
][options
.position
] );
64 if ( options
.tooltip
) {
65 $container
.attr( 'title', text
);
70 if ( !( text
in cache
) ) {
73 if ( !( w
in cache
[text
] ) ) {
76 if ( options
.position
in cache
[text
][w
] ) {
77 $container
.html( cache
[text
][w
][options
.position
] );
78 if ( options
.tooltip
) {
79 $container
.attr( 'title', text
);
81 console
.log("YAY CACHE HIT");
86 if ( $trimmableText
.width() + pw
> w
) {
87 switch ( options
.position
) {
89 // Use binary search-like technique for efficiency
90 var l
= 0, r
= trimmableText
.length
;
92 var m
= Math
.ceil( ( l
+ r
) / 2 );
93 $trimmableText
.text( trimmableText
.substr( 0, m
) + '...' );
94 if ( $trimmableText
.width() + pw
> w
) {
101 $trimmableText
.text( trimmableText
.substr( 0, l
) + '...' );
104 // TODO: Use binary search like for 'right'
105 var i
= [Math
.round( trimmableText
.length
/ 2 ), Math
.round( trimmableText
.length
/ 2 )];
106 var side
= 1; // Begin with making the end shorter
107 while ( $trimmableText
.outerWidth() + pw
> w
&& i
[0] > 0 ) {
108 $trimmableText
.text( trimmableText
.substr( 0, i
[0] ) + '...' + trimmableText
.substr( i
[1] ) );
109 // Alternate between trimming the end and begining
111 // Make the begining shorter
115 // Make the end shorter
122 // TODO: Use binary search like for 'right'
124 while ( $trimmableText
.outerWidth() + pw
> w
&& r
< trimmableText
.length
) {
125 $trimmableText
.text( '...' + trimmableText
.substr( r
) );
131 if ( options
.tooltip
) {
132 $container
.attr( 'title', text
);
134 if ( options
.matchText
) {
135 $container
.highlightText( options
.matchText
);
136 matchTextCache
[text
][options
.matchText
][w
][options
.position
] = $container
.html();
138 cache
[text
][w
][options
.position
] = $container
.html();