1(function($){
  2	$.fn.filter_visible = function(depth) {
  3		depth = depth || 3;
  4		var is_visible = function() {
  5			var p = $(this), i;
  6			for(i=0; i<depth-1; ++i) {
  7				if (!p.is(':visible')) return false;
  8				p = p.parent();
  9			}
 10			return true;
 11		};
 12		return this.filter(is_visible);
 13	};
 14	$.table_hotkeys = function(table, keys, opts) {
 15		opts = $.extend($.table_hotkeys.defaults, opts);
 16		var selected_class, destructive_class, set_current_row, adjacent_row_callback, get_adjacent_row, adjacent_row, prev_row, next_row, check, get_first_row, get_last_row, make_key_callback, first_row;
 17
 18		selected_class = opts.class_prefix + opts.selected_suffix;
 19		destructive_class = opts.class_prefix + opts.destructive_suffix;
 20		set_current_row = function (tr) {
 21			if ($.table_hotkeys.current_row) $.table_hotkeys.current_row.removeClass(selected_class);
 22			tr.addClass(selected_class);
 23			tr[0].scrollIntoView(false);
 24			$.table_hotkeys.current_row = tr;
 25		};
 26		adjacent_row_callback = function(which) {
 27			if (!adjacent_row(which) && typeof opts[which+'_page_link_cb'] === 'function' ) {
 28				opts[which+'_page_link_cb']();
 29			}
 30		};
 31		get_adjacent_row = function(which) {
 32			var first_row, method;
 33
 34			if (!$.table_hotkeys.current_row) {
 35				first_row = get_first_row();
 36				$.table_hotkeys.current_row = first_row;
 37				return first_row[0];
 38			}
 39			method = 'prev' == which? $.fn.prevAll : $.fn.nextAll;
 40			return method.call($.table_hotkeys.current_row, opts.cycle_expr).filter_visible()[0];
 41		};
 42		adjacent_row = function(which) {
 43			var adj = get_adjacent_row(which);
 44			if (!adj) return false;
 45			set_current_row($(adj));
 46			return true;
 47		};
 48		prev_row = function() { return adjacent_row('prev'); };
 49		next_row = function() { return adjacent_row('next'); };
 50		check = function() {
 51			$(opts.checkbox_expr, $.table_hotkeys.current_row).each(function() {
 52				this.checked = !this.checked;
 53			});
 54		};
 55		get_first_row = function() {
 56			return $(opts.cycle_expr, table).filter_visible().eq(opts.start_row_index);
 57		};
 58		get_last_row = function() {
 59			var rows = $(opts.cycle_expr, table).filter_visible();
 60			return rows.eq(rows.length-1);
 61		};
 62		make_key_callback = function(expr) {
 63			return function() {
 64				if ( null == $.table_hotkeys.current_row ) return false;
 65				var clickable = $(expr, $.table_hotkeys.current_row);
 66				if (!clickable.length) return false;
 67				if (clickable.is('.'+destructive_class)) next_row() || prev_row();
 68				clickable.trigger( 'click' );
 69			};
 70		};
 71		first_row = get_first_row();
 72		if (!first_row.length) return;
 73		if (opts.highlight_first)
 74			set_current_row(first_row);
 75		else if (opts.highlight_last)
 76			set_current_row(get_last_row());
 77		$.hotkeys.add(opts.prev_key, opts.hotkeys_opts, function() {return adjacent_row_callback('prev');});
 78		$.hotkeys.add(opts.next_key, opts.hotkeys_opts, function() {return adjacent_row_callback('next');});
 79		$.hotkeys.add(opts.mark_key, opts.hotkeys_opts, check);
 80		$.each(keys, function() {
 81			var callback, key;
 82
 83			if ( typeof this[1] === 'function' ) {
 84				callback = this[1];
 85				key = this[0];
 86				$.hotkeys.add(key, opts.hotkeys_opts, function(event) { return callback(event, $.table_hotkeys.current_row); });
 87			} else {
 88				key = this;
 89				$.hotkeys.add(key, opts.hotkeys_opts, make_key_callback('.'+opts.class_prefix+key));
 90			}
 91		});
 92
 93	};
 94	$.table_hotkeys.current_row = null;
 95	$.table_hotkeys.defaults = {cycle_expr: 'tr', class_prefix: 'vim-', selected_suffix: 'current',
 96		destructive_suffix: 'destructive', hotkeys_opts: {disableInInput: true, type: 'keypress'},
 97		checkbox_expr: ':checkbox', next_key: 'j', prev_key: 'k', mark_key: 'x',
 98		start_row_index: 2, highlight_first: false, highlight_last: false, next_page_link_cb: false, prev_page_link_cb: false};
 99})(jQuery);
100