Template:Harvard BioDesign/assets/js/util.js
(function($) {
/** * Generate an indented list of links from a nav. Meant for use with panel(). * @return {jQuery} jQuery object. */ $.fn.navList = function() {
var $this = $(this); $a = $this.find('a'), b = [];
$a.each(function() {
var $this = $(this), indent = Math.max(0, $this.parents('li').length - 1), href = $this.attr('href'), target = $this.attr('target');
b.push( '<a ' + 'class="link depth-' + indent + '"' + ( (typeof target !== 'undefined' && target != ) ? ' target="' + target + '"' : ) + ( (typeof href !== 'undefined' && href != ) ? ' href="' + href + '"' : ) + '>' + '' + $this.text() + '</a>' );
});
return b.join();
};
/** * Panel-ify an element. * @param {object} userConfig User config. * @return {jQuery} jQuery object. */ $.fn.panel = function(userConfig) {
// No elements? if (this.length == 0) return $this;
// Multiple elements? if (this.length > 1) {
for (var i=0; i < this.length; i++) $(this[i]).panel(userConfig);
return $this;
}
// Vars. var $this = $(this), $body = $('body'), $window = $(window), id = $this.attr('id'), config;
// Config. config = $.extend({
// Delay. delay: 0,
// Hide panel on link click. hideOnClick: false,
// Hide panel on escape keypress. hideOnEscape: false,
// Hide panel on swipe. hideOnSwipe: false,
// Reset scroll position on hide. resetScroll: false,
// Reset forms on hide. resetForms: false,
// Side of viewport the panel will appear. side: null,
// Target element for "class". target: $this,
// Class to toggle. visibleClass: 'visible'
}, userConfig);
// Expand "target" if it's not a jQuery object already. if (typeof config.target != 'jQuery') config.target = $(config.target);
// Panel.
// Methods. $this._hide = function(event) {
// Already hidden? Bail. if (!config.target.hasClass(config.visibleClass)) return;
// If an event was provided, cancel it. if (event) {
event.preventDefault(); event.stopPropagation();
}
// Hide. config.target.removeClass(config.visibleClass);
// Post-hide stuff. window.setTimeout(function() {
// Reset scroll position. if (config.resetScroll) $this.scrollTop(0);
// Reset forms. if (config.resetForms) $this.find('form').each(function() { this.reset(); });
}, config.delay);
};
// Vendor fixes. $this .css('-ms-overflow-style', '-ms-autohiding-scrollbar') .css('-webkit-overflow-scrolling', 'touch');
// Hide on click. if (config.hideOnClick) {
$this.find('a') .css('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
$this .on('click', 'a', function(event) {
var $a = $(this), href = $a.attr('href'), target = $a.attr('target');
if (!href || href == '#' || href == || href == '#' + id) return;
// Cancel original event. event.preventDefault(); event.stopPropagation();
// Hide panel. $this._hide();
// Redirect to href. window.setTimeout(function() {
if (target == '_blank') window.open(href); else window.location.href = href;
}, config.delay + 10);
});
}
// Event: Touch stuff. $this.on('touchstart', function(event) {
$this.touchPosX = event.originalEvent.touches[0].pageX; $this.touchPosY = event.originalEvent.touches[0].pageY;
})
$this.on('touchmove', function(event) {
if ($this.touchPosX === null || $this.touchPosY === null) return;
var diffX = $this.touchPosX - event.originalEvent.touches[0].pageX, diffY = $this.touchPosY - event.originalEvent.touches[0].pageY, th = $this.outerHeight(), ts = ($this.get(0).scrollHeight - $this.scrollTop());
// Hide on swipe? if (config.hideOnSwipe) {
var result = false, boundary = 20, delta = 50;
switch (config.side) {
case 'left': result = (diffY < boundary && diffY > (-1 * boundary)) && (diffX > delta); break;
case 'right': result = (diffY < boundary && diffY > (-1 * boundary)) && (diffX < (-1 * delta)); break;
case 'top': result = (diffX < boundary && diffX > (-1 * boundary)) && (diffY > delta); break;
case 'bottom': result = (diffX < boundary && diffX > (-1 * boundary)) && (diffY < (-1 * delta)); break;
default: break;
}
if (result) {
$this.touchPosX = null; $this.touchPosY = null; $this._hide();
return false;
}
}
// Prevent vertical scrolling past the top or bottom. if (($this.scrollTop() < 0 && diffY < 0) || (ts > (th - 2) && ts < (th + 2) && diffY > 0)) {
event.preventDefault(); event.stopPropagation();
}
});
// Event: Prevent certain events inside the panel from bubbling. $this.on('click touchend touchstart touchmove', function(event) { event.stopPropagation(); });
// Event: Hide panel if a child anchor tag pointing to its ID is clicked. $this.on('click', 'a[href="#' + id + '"]', function(event) {
event.preventDefault(); event.stopPropagation();
config.target.removeClass(config.visibleClass);
});
// Body.
// Event: Hide panel on body click/tap. $body.on('click touchend', function(event) { $this._hide(event); });
// Event: Toggle. $body.on('click', 'a[href="#' + id + '"]', function(event) {
event.preventDefault(); event.stopPropagation();
config.target.toggleClass(config.visibleClass);
});
// Window.
// Event: Hide on ESC. if (config.hideOnEscape) $window.on('keydown', function(event) {
if (event.keyCode == 27) $this._hide(event);
});
return $this;
};
/** * Apply "placeholder" attribute polyfill to one or more forms. * @return {jQuery} jQuery object. */ $.fn.placeholder = function() {
// Browser natively supports placeholders? Bail. if (typeof (document.createElement('input')).placeholder != 'undefined') return $(this);
// No elements? if (this.length == 0) return $this;
// Multiple elements? if (this.length > 1) {
for (var i=0; i < this.length; i++) $(this[i]).placeholder();
return $this;
}
// Vars. var $this = $(this);
// Text, TextArea. $this.find('input[type=text],textarea') .each(function() {
var i = $(this);
if (i.val() == || i.val() == i.attr('placeholder')) i .addClass('polyfill-placeholder') .val(i.attr('placeholder'));
}) .on('blur', function() {
var i = $(this);
if (i.attr('name').match(/-polyfill-field$/)) return;
if (i.val() == ) i .addClass('polyfill-placeholder') .val(i.attr('placeholder'));
}) .on('focus', function() {
var i = $(this);
if (i.attr('name').match(/-polyfill-field$/)) return;
if (i.val() == i.attr('placeholder')) i .removeClass('polyfill-placeholder') .val();
});
// Password. $this.find('input[type=password]') .each(function() {
var i = $(this); var x = $(
$('.append(i.clone()) .remove() .html() .replace(/type="password"/i, 'type="text"') .replace(/type=password/i, 'type=text') );
if (i.attr('id') != ) x.attr('id', i.attr('id') + '-polyfill-field');
if (i.attr('name') != ) x.attr('name', i.attr('name') + '-polyfill-field');
x.addClass('polyfill-placeholder') .val(x.attr('placeholder')).insertAfter(i);
if (i.val() == ) i.hide(); else x.hide();
i .on('blur', function(event) {
event.preventDefault();
var x = i.parent().find('input[name=' + i.attr('name') + '-polyfill-field]');
if (i.val() == ) {
i.hide(); x.show();
}
});
x .on('focus', function(event) {
event.preventDefault();
var i = x.parent().find('input[name=' + x.attr('name').replace('-polyfill-field', ) + ']');
x.hide();
i .show() .focus();
}) .on('keypress', function(event) {
event.preventDefault(); x.val();
});
});
// Events. $this .on('submit', function() {
$this.find('input[type=text],input[type=password],textarea') .each(function(event) {
var i = $(this);
if (i.attr('name').match(/-polyfill-field$/)) i.attr('name', );
if (i.val() == i.attr('placeholder')) {
i.removeClass('polyfill-placeholder'); i.val();
}
});
}) .on('reset', function(event) {
event.preventDefault();
$this.find('select') .val($('option:first').val());
$this.find('input,textarea') .each(function() {
var i = $(this), x;
i.removeClass('polyfill-placeholder');
switch (this.type) {
case 'submit': case 'reset': break;
case 'password': i.val(i.attr('defaultValue'));
x = i.parent().find('input[name=' + i.attr('name') + '-polyfill-field]');
if (i.val() == ) { i.hide(); x.show(); } else { i.show(); x.hide(); }
break;
case 'checkbox': case 'radio': i.attr('checked', i.attr('defaultValue')); break;
case 'text': case 'textarea': i.val(i.attr('defaultValue'));
if (i.val() == ) { i.addClass('polyfill-placeholder'); i.val(i.attr('placeholder')); }
break;
default: i.val(i.attr('defaultValue')); break;
} });
});
return $this;
};
/** * Moves elements to/from the first positions of their respective parents. * @param {jQuery} $elements Elements (or selector) to move. * @param {bool} condition If true, moves elements to the top. Otherwise, moves elements back to their original locations. */ $.prioritize = function($elements, condition) {
var key = '__prioritize';
// Expand $elements if it's not already a jQuery object. if (typeof $elements != 'jQuery') $elements = $($elements);
// Step through elements. $elements.each(function() {
var $e = $(this), $p, $parent = $e.parent();
// No parent? Bail. if ($parent.length == 0) return;
// Not moved? Move it. if (!$e.data(key)) {
// Condition is false? Bail. if (!condition) return;
// Get placeholder (which will serve as our point of reference for when this element needs to move back). $p = $e.prev();
// Couldn't find anything? Means this element's already at the top, so bail. if ($p.length == 0) return;
// Move element to top of parent. $e.prependTo($parent);
// Mark element as moved. $e.data(key, $p);
}
// Moved already? else {
// Condition is true? Bail. if (condition) return;
$p = $e.data(key);
// Move element back to its original location (using our placeholder). $e.insertAfter($p);
// Unmark element as moved. $e.removeData(key);
}
});
};
})(jQuery);