mirror of
https://github.com/photonstorm/phaser
synced 2024-11-27 15:12:18 +00:00
100 lines
2.6 KiB
JavaScript
100 lines
2.6 KiB
JavaScript
(function($) {
|
|
$.fn.toc = function(options) {
|
|
var self = this;
|
|
var opts = $.extend({}, jQuery.fn.toc.defaults, options);
|
|
|
|
var container = $(opts.container);
|
|
var headings = $(opts.selectors, container);
|
|
var headingOffsets = [];
|
|
var activeClassName = opts.prefix+'-active';
|
|
|
|
var scrollTo = function(e) {
|
|
if (opts.smoothScrolling) {
|
|
e.preventDefault();
|
|
var elScrollTo = $(e.target).attr('href');
|
|
var $el = $(elScrollTo);
|
|
|
|
$('body,html').animate({ scrollTop: $el.offset().top }, 400, 'swing', function() {
|
|
location.hash = elScrollTo;
|
|
});
|
|
}
|
|
$('li', self).removeClass(activeClassName);
|
|
$(e.target).parent().addClass(activeClassName);
|
|
};
|
|
|
|
//highlight on scroll
|
|
var timeout;
|
|
var highlightOnScroll = function(e) {
|
|
if (timeout) {
|
|
clearTimeout(timeout);
|
|
}
|
|
timeout = setTimeout(function() {
|
|
var top = $(window).scrollTop(),
|
|
highlighted;
|
|
for (var i = 0, c = headingOffsets.length; i < c; i++) {
|
|
if (headingOffsets[i] >= top) {
|
|
$('li', self).removeClass(activeClassName);
|
|
highlighted = $('li:eq('+(i-1)+')', self).addClass(activeClassName);
|
|
opts.onHighlight(highlighted);
|
|
break;
|
|
}
|
|
}
|
|
}, 50);
|
|
};
|
|
if (opts.highlightOnScroll) {
|
|
$(window).bind('scroll', highlightOnScroll);
|
|
highlightOnScroll();
|
|
}
|
|
|
|
return this.each(function() {
|
|
//build TOC
|
|
var el = $(this);
|
|
var ul = $('<ul/>');
|
|
headings.each(function(i, heading) {
|
|
var $h = $(heading);
|
|
headingOffsets.push($h.offset().top - opts.highlightOffset);
|
|
|
|
//add anchor
|
|
var anchor = $('<span/>').attr('id', opts.anchorName(i, heading, opts.prefix)).insertBefore($h);
|
|
|
|
//build TOC item
|
|
var a = $('<a/>')
|
|
.text(opts.headerText(i, heading, $h))
|
|
.attr('href', '#' + opts.anchorName(i, heading, opts.prefix))
|
|
.bind('click', function(e) {
|
|
scrollTo(e);
|
|
el.trigger('selected', $(this).attr('href'));
|
|
});
|
|
|
|
var li = $('<li/>')
|
|
.addClass(opts.itemClass(i, heading, $h, opts.prefix))
|
|
.append(a);
|
|
|
|
ul.append(li);
|
|
});
|
|
el.html(ul);
|
|
});
|
|
};
|
|
|
|
|
|
jQuery.fn.toc.defaults = {
|
|
container: 'body',
|
|
selectors: 'h1,h2,h3',
|
|
smoothScrolling: true,
|
|
prefix: 'toc',
|
|
onHighlight: function() {},
|
|
highlightOnScroll: true,
|
|
highlightOffset: 100,
|
|
anchorName: function(i, heading, prefix) {
|
|
return prefix+i;
|
|
},
|
|
headerText: function(i, heading, $heading) {
|
|
return $heading.text();
|
|
},
|
|
itemClass: function(i, heading, $heading, prefix) {
|
|
return prefix + '-' + $heading[0].tagName.toLowerCase();
|
|
}
|
|
|
|
};
|
|
|
|
})(jQuery);
|