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444 lines
11 KiB
JavaScript
444 lines
11 KiB
JavaScript
/* =========================================================
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* bootstrap-treeview.js v1.0.0
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* =========================================================
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* Copyright 2013 Jonathan Miles
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* Project URL : http://www.jondmiles.com/bootstrap-treeview
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ========================================================= */
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;(function($, window, document, undefined) {
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/*global jQuery, console*/
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'use strict';
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var pluginName = 'treeview';
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var Tree = function(element, options) {
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this.$element = $(element);
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this._element = element;
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this._elementId = this._element.id;
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this._styleId = this._elementId + '-style';
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this.tree = [];
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this.nodes = [];
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this.selectedNode = {};
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this._init(options);
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};
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Tree.defaults = {
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injectStyle: true,
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levels: 2,
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expandIcon: 'glyphicon glyphicon-plus',
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collapseIcon: 'glyphicon glyphicon-minus',
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nodeIcon: 'glyphicon glyphicon-stop',
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color: undefined, // '#000000',
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backColor: undefined, // '#FFFFFF',
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borderColor: undefined, // '#dddddd',
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onhoverColor: '#F5F5F5',
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selectedColor: '#FFFFFF',
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selectedBackColor: '#428bca',
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enableLinks: false,
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highlightSelected: true,
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showBorder: true,
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showTags: false,
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// Event handler for when a node is selected
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onNodeSelected: undefined
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};
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Tree.prototype = {
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remove: function() {
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this._destroy();
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$.removeData(this, 'plugin_' + pluginName);
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$('#' + this._styleId).remove();
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},
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_destroy: function() {
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if (this.initialized) {
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this.$wrapper.remove();
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this.$wrapper = null;
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// Switch off events
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this._unsubscribeEvents();
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}
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// Reset initialized flag
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this.initialized = false;
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},
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_init: function(options) {
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if (options.data) {
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if (typeof options.data === 'string') {
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options.data = $.parseJSON(options.data);
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}
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this.tree = $.extend(true, [], options.data);
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delete options.data;
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}
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this.options = $.extend({}, Tree.defaults, options);
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this._setInitialLevels(this.tree, 0);
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this._destroy();
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this._subscribeEvents();
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this._render();
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},
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_unsubscribeEvents: function() {
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this.$element.off('click');
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},
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_subscribeEvents: function() {
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this._unsubscribeEvents();
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this.$element.on('click', $.proxy(this._clickHandler, this));
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if (typeof (this.options.onNodeSelected) === 'function') {
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this.$element.on('nodeSelected', this.options.onNodeSelected);
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}
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},
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_clickHandler: function(event) {
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if (!this.options.enableLinks) { event.preventDefault(); }
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var target = $(event.target),
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classList = target.attr('class') ? target.attr('class').split(' ') : [],
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node = this._findNode(target);
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if ((classList.indexOf('click-expand') != -1) ||
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(classList.indexOf('click-collapse') != -1)) {
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// Expand or collapse node by toggling child node visibility
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this._toggleNodes(node);
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this._render();
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}
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else if (node) {
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this._setSelectedNode(node);
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}
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},
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// Looks up the DOM for the closest parent list item to retrieve the
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// data attribute nodeid, which is used to lookup the node in the flattened structure.
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_findNode: function(target) {
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var nodeId = target.closest('li.list-group-item').attr('data-nodeid'),
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node = this.nodes[nodeId];
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if (!node) {
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console.log('Error: node does not exist');
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}
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return node;
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},
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// Actually triggers the nodeSelected event
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_triggerNodeSelectedEvent: function(node) {
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this.$element.trigger('nodeSelected', [$.extend(true, {}, node)]);
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},
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// Handles selecting and unselecting of nodes,
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// as well as determining whether or not to trigger the nodeSelected event
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_setSelectedNode: function(node) {
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if (!node) { return; }
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if (node === this.selectedNode) {
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this.selectedNode = {};
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}
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else {
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this._triggerNodeSelectedEvent(this.selectedNode = node);
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}
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this._render();
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},
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// On initialization recurses the entire tree structure
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// setting expanded / collapsed states based on initial levels
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_setInitialLevels: function(nodes, level) {
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if (!nodes) { return; }
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level += 1;
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var self = this;
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$.each(nodes, function addNodes(id, node) {
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if (level >= self.options.levels) {
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self._toggleNodes(node);
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}
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// Need to traverse both nodes and _nodes to ensure
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// all levels collapsed beyond levels
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var nodes = node.nodes ? node.nodes : node._nodes ? node._nodes : undefined;
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if (nodes) {
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return self._setInitialLevels(nodes, level);
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}
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});
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},
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// Toggle renaming nodes -> _nodes, _nodes -> nodes
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// to simulate expanding or collapsing a node.
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_toggleNodes: function(node) {
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if (!node.nodes && !node._nodes) {
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return;
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}
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if (node.nodes) {
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node._nodes = node.nodes;
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delete node.nodes;
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}
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else {
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node.nodes = node._nodes;
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delete node._nodes;
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}
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},
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_render: function() {
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var self = this;
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if (!self.initialized) {
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// Setup first time only components
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self.$element.addClass(pluginName);
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self.$wrapper = $(self._template.list);
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self._injectStyle();
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self.initialized = true;
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}
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self.$element.empty().append(self.$wrapper.empty());
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// Build tree
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self.nodes = [];
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self._buildTree(self.tree, 0);
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},
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// Starting from the root node, and recursing down the
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// structure we build the tree one node at a time
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_buildTree: function(nodes, level) {
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if (!nodes) { return; }
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level += 1;
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var self = this;
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$.each(nodes, function addNodes(id, node) {
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node.nodeId = self.nodes.length;
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self.nodes.push(node);
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var treeItem = $(self._template.item)
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.addClass('node-' + self._elementId)
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.addClass((node === self.selectedNode) ? 'node-selected' : '')
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.attr('data-nodeid', node.nodeId)
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.attr('style', self._buildStyleOverride(node));
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// Add indent/spacer to mimic tree structure
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for (var i = 0; i < (level - 1); i++) {
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treeItem.append(self._template.indent);
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}
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// Add expand, collapse or empty spacer icons
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// to facilitate tree structure navigation
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if (node._nodes) {
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treeItem
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.append($(self._template.iconWrapper)
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.append($(self._template.icon)
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.addClass('click-expand')
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.addClass(self.options.expandIcon))
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);
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}
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else if (node.nodes) {
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treeItem
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.append($(self._template.iconWrapper)
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.append($(self._template.icon)
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.addClass('click-collapse')
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.addClass(self.options.collapseIcon))
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);
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}
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else {
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treeItem
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.append($(self._template.iconWrapper)
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.append($(self._template.icon)
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.addClass('glyphicon'))
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);
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}
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// Add node icon
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treeItem
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.append($(self._template.iconWrapper)
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.append($(self._template.icon)
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.addClass(node.icon ? node.icon : self.options.nodeIcon))
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);
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// Add text
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if (self.options.enableLinks) {
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// Add hyperlink
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treeItem
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.append($(self._template.link)
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.attr('href', node.href)
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.append(node.text)
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);
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}
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else {
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// otherwise just text
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treeItem
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.append(node.text);
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}
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// Add tags as badges
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if (self.options.showTags && node.tags) {
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$.each(node.tags, function addTag(id, tag) {
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treeItem
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.append($(self._template.badge)
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.append(tag)
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);
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});
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}
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// Add item to the tree
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self.$wrapper.append(treeItem);
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// Recursively add child ndoes
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if (node.nodes) {
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return self._buildTree(node.nodes, level);
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}
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});
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},
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// Define any node level style override for
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// 1. selectedNode
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// 2. node|data assigned color overrides
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_buildStyleOverride: function(node) {
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var style = '';
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if (this.options.highlightSelected && (node === this.selectedNode)) {
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style += 'color:' + this.options.selectedColor + ';';
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}
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else if (node.color) {
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style += 'color:' + node.color + ';';
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}
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if (this.options.highlightSelected && (node === this.selectedNode)) {
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style += 'background-color:' + this.options.selectedBackColor + ';';
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}
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else if (node.backColor) {
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style += 'background-color:' + node.backColor + ';';
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}
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return style;
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},
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// Add inline style into head
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_injectStyle: function() {
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if (this.options.injectStyle && !document.getElementById(this._styleId)) {
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$('<style type="text/css" id="' + this._styleId + '"> ' + this._buildStyle() + ' </style>').appendTo('head');
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}
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},
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// Construct trees style based on user options
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_buildStyle: function() {
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var style = '.node-' + this._elementId + '{';
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if (this.options.color) {
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style += 'color:' + this.options.color + ';';
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}
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if (this.options.backColor) {
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style += 'background-color:' + this.options.backColor + ';';
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}
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if (!this.options.showBorder) {
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style += 'border:none;';
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}
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else if (this.options.borderColor) {
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style += 'border:1px solid ' + this.options.borderColor + ';';
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}
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style += '}';
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if (this.options.onhoverColor) {
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style += '.node-' + this._elementId + ':hover{' +
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'background-color:' + this.options.onhoverColor + ';' +
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'}';
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}
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return this._css + style;
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},
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_template: {
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list: '<ul class="list-group"></ul>',
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item: '<li class="list-group-item"></li>',
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indent: '<span class="indent"></span>',
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iconWrapper: '<span class="icon"></span>',
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icon: '<i></i>',
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link: '<a href="#" style="color:inherit;"></a>',
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badge: '<span class="badge"></span>'
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},
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_css: '.list-group-item{cursor:pointer;}span.indent{margin-left:10px;margin-right:10px}span.icon{margin-right:5px}'
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// _css: '.list-group-item{cursor:pointer;}.list-group-item:hover{background-color:#f5f5f5;}span.indent{margin-left:10px;margin-right:10px}span.icon{margin-right:5px}'
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};
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var logError = function(message) {
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if(window.console) {
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window.console.error(message);
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}
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};
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// Prevent against multiple instantiations,
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// handle updates and method calls
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$.fn[pluginName] = function(options, args) {
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return this.each(function() {
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var self = $.data(this, 'plugin_' + pluginName);
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if (typeof options === 'string') {
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if (!self) {
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logError('Not initialized, can not call method : ' + options);
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}
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else if (!$.isFunction(self[options]) || options.charAt(0) === '_') {
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logError('No such method : ' + options);
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}
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else {
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if (typeof args === 'string') {
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args = [args];
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}
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self[options].apply(self, args);
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}
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}
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else {
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if (!self) {
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$.data(this, 'plugin_' + pluginName, new Tree(this, $.extend(true, {}, options)));
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}
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else {
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self._init(options);
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}
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}
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});
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};
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})(jQuery, window, document); |