Merge branch 'master' of github.com:roundcube/roundcubemail
Aleksander Machniak
12 years ago
commit
8bfbd5e9f9
@ -0,0 +1,425 @@
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/*
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+-----------------------------------------------------------------------+
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| Roundcube Treelist widget |
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| |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2013, The Roundcube Dev Team |
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| |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| |
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+-----------------------------------------------------------------------+
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| Authors: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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| Requires: common.js |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Roundcube Treelist widget class
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* @contructor
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*/
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function rcube_treelist_widget(node, p)
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{
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// apply some defaults to p
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p = $.extend({
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id_prefix: '',
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autoexpand: 1000,
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selectable: false,
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check_droptarget: function(node){ return !node.virtual }
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}, p || {});
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var container = $(node);
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var data = p.data || [];
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var indexbyid = {};
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var selection = null;
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var drag_active = false;
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var box_coords = {};
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var item_coords = [];
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var autoexpand_timer;
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var autoexpand_item;
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var body_scroll_top = 0;
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var list_scroll_top = 0;
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var me = this;
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/////// export public members and methods
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this.container = container;
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this.expand = expand;
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this.collapse = collapse;
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this.select = select;
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this.render = render;
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this.drag_start = drag_start;
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this.drag_end = drag_end;
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this.intersects = intersects;
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/////// startup code (constructor)
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// abort if node not found
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if (!container.length)
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return;
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if (p.data) {
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index_data({ children:data });
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}
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// load data from DOM
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else {
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data = walk_list(container);
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// console.log(data);
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}
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// register click handlers on list
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container.on('click', 'div.treetoggle', function(e){
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toggle(dom2id($(this).parent()));
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});
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container.on('click', 'li', function(e){
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var node = p.selectable ? indexbyid[dom2id($(this))] : null;
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if (node && !node.virtual) {
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select(node.id);
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e.stopPropagation();
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}
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});
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/////// private methods
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/**
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* Collaps a the node with the given ID
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*/
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function collapse(id, recursive, set)
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{
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var node;
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if (node = indexbyid[id]) {
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node.collapsed = typeof set == 'undefined' || set;
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update_dom(node);
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// Work around a bug in IE6 and IE7, see #1485309
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if (window.bw && (bw.ie6 || bw.ie7) && node.collapsed) {
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id2dom(node.id).next().children('ul:visible').hide().show();
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}
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if (recursive && node.children) {
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for (var i=0; i < node.children.length; i++) {
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collapse(node.children[i].id, recursive, set);
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}
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}
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me.triggerEvent(node.collapsed ? 'collapse' : 'expand', node);
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}
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}
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/**
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* Expand a the node with the given ID
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*/
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function expand(id, recursive)
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{
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collapse(id, recursive, false);
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}
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/**
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* Toggle collapsed state of a list node
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*/
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function toggle(id, recursive)
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{
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var node;
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if (node = indexbyid[id]) {
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collapse(id, recursive, !node.collapsed);
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}
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}
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/**
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* Select a tree node by it's ID
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*/
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function select(id)
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{
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if (selection) {
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id2dom(selection).removeClass('selected');
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selection = null;
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}
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var li = id2dom(id);
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if (li.length) {
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li.addClass('selected');
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selection = id;
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// TODO: expand all parent nodes if collapsed
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scroll_to_node(li);
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}
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me.triggerEvent('select', indexbyid[id]);
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}
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/**
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* Getter for the currently selected node ID
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*/
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function get_selection()
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{
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return selection;
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}
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/**
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* Return the DOM element of the list item with the given ID
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*/
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function get_item(id)
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{
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return id2dom(id).get(0);
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}
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/**
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* Apply the 'collapsed' status of the data node to the corresponding DOM element(s)
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*/
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function update_dom(node)
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{
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var li = id2dom(node.id);
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li.children('ul').first()[(node.collapsed ? 'hide' : 'show')]();
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li.children('div.treetoggle').removeClass('collapsed expanded').addClass(node.collapsed ? 'collapsed' : 'expanded');
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me.triggerEvent('toggle', node);
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}
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/**
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* Render the tree list from the internal data structure
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*/
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function render()
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{
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if (me.triggerEvent('renderBefore', data) === false)
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return;
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// remove all child nodes
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container.html('');
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// render child nodes
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for (var i=0; i < data.length; i++) {
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render_node(data[i], container);
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}
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me.triggerEvent('renderAfter', container);
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}
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/**
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* Render a specific node into the DOM list
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*/
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function render_node(node, parent)
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{
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var li = $('<li>' + node.html + '</li>')
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.attr('id', p.id_prefix + node.id)
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.addClass((node.classes || []).join(' '))
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.appendTo(parent);
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if (node.virtual)
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li.addClass('virtual');
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if (node.id == selection)
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li.addClass('selected');
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// add child list and toggle icon
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if (node.children && node.children.length) {
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$('<div class="treetoggle '+(node.collapsed ? 'collapsed' : 'expanded') + '"> </div>').appendTo(li);
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var ul = $('<ul>').appendTo(li);
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if (node.collapsed)
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ul.hide();
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for (var i=0; i < node.children.length; i++) {
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render_node(node.children[i], ul);
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}
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}
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}
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/**
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* Recursively walk the DOM tree and build an internal data structure
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* representing the skeleton of this tree list.
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*/
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function walk_list(ul)
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{
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var result = [];
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ul.children('li').each(function(i,e){
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var li = $(e);
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var node = {
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id: dom2id(li),
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classes: li.attr('class').split(' '),
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virtual: li.hasClass('virtual'),
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html: li.children().first().get(0).outerHTML,
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children: walk_list(li.children('ul'))
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}
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if (node.children.length) {
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node.collapsed = li.children('ul').css('display') == 'none';
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}
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if (li.hasClass('selected')) {
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selection = node.id;
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}
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result.push(node);
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indexbyid[node.id] = node;
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})
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return result;
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}
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/**
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* Recursively walk the data tree and index nodes by their ID
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*/
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function index_data(node)
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{
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if (node.id) {
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indexbyid[node.id] = node;
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}
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for (var c=0; node.children && c < node.children.length; c++) {
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index_data(node.children[c]);
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}
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}
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/**
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* Get the (stripped) node ID from the given DOM element
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*/
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function dom2id(li)
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{
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var domid = li.attr('id').replace(new RegExp('^' + (p.id_prefix) || '%'), '');
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return p.id_decode ? p.id_decode(domid) : domid;
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}
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/**
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* Get the <li> element for the given node ID
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*/
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function id2dom(id)
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{
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var domid = p.id_encode ? p.id_encode(id) : id;
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return $('#' + p.id_prefix + domid);
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}
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/**
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* Scroll the parent container to make the given list item visible
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*/
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function scroll_to_node(li)
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{
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var scroller = container.parent();
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scroller.scrollTop(li.offset().top - scroller.offset().top + scroller.scrollTop());
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}
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///// drag & drop support
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/**
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* When dragging starts, compute absolute bounding boxes of the list and it's items
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* for faster comparisons while mouse is moving
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*/
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function drag_start()
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{
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var li, item, height,
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pos = container.offset();
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body_scroll_top = bw.ie ? 0 : window.pageYOffset;
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list_scroll_top = container.parent().scrollTop();
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drag_active = true;
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box_coords = {
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x1: pos.left,
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y1: pos.top,
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x2: pos.left + container.width(),
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y2: pos.top + container.height()
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};
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item_coords = [];
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for (var id in indexbyid) {
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li = id2dom(id);
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item = li.children().first().get(0);
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if (height = item.offsetHeight) {
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pos = $(item).offset();
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item_coords[id] = {
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x1: pos.left,
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y1: pos.top,
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x2: pos.left + item.offsetWidth,
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y2: pos.top + height,
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on: id == autoexpand_item
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};
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}
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}
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}
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/**
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* Signal that dragging has stopped
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*/
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function drag_end()
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{
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drag_active = false;
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if (autoexpand_timer) {
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clearTimeout(autoexpand_timer);
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autoexpand_timer = null;
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autoexpand_item = null;
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}
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$('li.droptarget', container).removeClass('droptarget');
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}
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/**
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* Determine if the given mouse coords intersect the list and one if its items
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*/
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function intersects(mouse, highlight)
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{
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// offsets to compensate for scrolling while dragging a message
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var boffset = bw.ie ? -document.documentElement.scrollTop : body_scroll_top,
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moffset = list_scroll_top - container.parent().scrollTop(),
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result = null;
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mouse.top = mouse.y + -moffset - boffset;
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// no intersection with list bounding box
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if (mouse.x < box_coords.x1 || mouse.x >= box_coords.x2 || mouse.top < box_coords.y1 || mouse.top >= box_coords.y2) {
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// TODO: optimize performance for this operation
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$('li.droptarget', container).removeClass('droptarget');
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return result;
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}
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// check intersection with visible list items
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var pos, node;
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for (var id in item_coords) {
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pos = item_coords[id];
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if (mouse.x >= pos.x1 && mouse.x < pos.x2 && mouse.top >= pos.y1 && mouse.top < pos.y2) {
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node = indexbyid[id];
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// if the folder is collapsed, expand it after the configured time
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if (node.children && node.children.length && node.collapsed && p.autoexpand && autoexpand_item != id) {
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if (autoexpand_timer)
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clearTimeout(autoexpand_timer);
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autoexpand_item = id;
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autoexpand_timer = setTimeout(function() {
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expand(autoexpand_item);
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drag_start(); // re-calculate item coords
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autoexpand_item = null;
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}, p.autoexpand);
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}
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else if (autoexpand_timer && autoexpand_item != id) {
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clearTimeout(autoexpand_timer);
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autoexpand_item = null;
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autoexpand_timer = null;
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}
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// check if this item is accepted as drop target
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if (p.check_droptarget(node)) {
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if (highlight) {
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id2dom(id).addClass('droptarget');
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pos.on = true;
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}
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result = id;
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}
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else {
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result = null;
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}
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}
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else if (pos.on) {
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id2dom(id).removeClass('droptarget');
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pos.on = false;
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}
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}
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return result;
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}
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}
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// use event processing functions from Roundcube's rcube_event_engine
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rcube_treelist_widget.prototype.addEventListener = rcube_event_engine.prototype.addEventListener;
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rcube_treelist_widget.prototype.removeEventListener = rcube_event_engine.prototype.removeEventListener;
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rcube_treelist_widget.prototype.triggerEvent = rcube_event_engine.prototype.triggerEvent;
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