330 lines
12 KiB
JavaScript
330 lines
12 KiB
JavaScript
/* eslint-disable */
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/*! Clusterize.js - v0.17.6 - 2017-03-05
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* http://NeXTs.github.com/Clusterize.js/
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* Copyright (c) 2015 Denis Lukov; Licensed GPLv3 */
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;(function(name, definition) {
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if (typeof module != 'undefined') module.exports = definition();
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else if (typeof define == 'function' && typeof define.amd == 'object') define(definition);
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else this[name] = definition();
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}('Clusterize', function() {
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"use strict"
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// detect ie9 and lower
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// https://gist.github.com/padolsey/527683#comment-786682
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var ie = (function(){
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for( var v = 3,
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el = document.createElement('b'),
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all = el.all || [];
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el.innerHTML = '<!--[if gt IE ' + (++v) + ']><i><![endif]-->',
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all[0];
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){}
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return v > 4 ? v : document.documentMode;
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}()),
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is_mac = navigator.platform.toLowerCase().indexOf('mac') + 1;
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var Clusterize = function(data) {
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if( ! (this instanceof Clusterize))
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return new Clusterize(data);
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var self = this;
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var defaults = {
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rows_in_block: 50,
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blocks_in_cluster: 4,
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tag: null,
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show_no_data_row: true,
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no_data_class: 'clusterize-no-data',
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no_data_text: 'No data',
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keep_parity: true,
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callbacks: {}
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}
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// public parameters
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self.options = {};
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var options = ['rows_in_block', 'blocks_in_cluster', 'show_no_data_row', 'no_data_class', 'no_data_text', 'keep_parity', 'tag', 'callbacks'];
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for(var i = 0, option; option = options[i]; i++) {
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self.options[option] = typeof data[option] != 'undefined' && data[option] != null
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? data[option]
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: defaults[option];
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}
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var elems = ['scroll', 'content'];
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for(var i = 0, elem; elem = elems[i]; i++) {
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self[elem + '_elem'] = data[elem + 'Id']
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? document.getElementById(data[elem + 'Id'])
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: data[elem + 'Elem'];
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if( ! self[elem + '_elem'])
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throw new Error("Error! Could not find " + elem + " element");
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}
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// tabindex forces the browser to keep focus on the scrolling list, fixes #11
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if( ! self.content_elem.hasAttribute('tabindex'))
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self.content_elem.setAttribute('tabindex', 0);
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// private parameters
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var rows = isArray(data.rows)
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? data.rows
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: self.fetchMarkup(),
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cache = {},
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scroll_top = self.scroll_elem.scrollTop;
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// append initial data
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self.insertToDOM(rows, cache);
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// restore the scroll position
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self.scroll_elem.scrollTop = scroll_top;
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// adding scroll handler
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var last_cluster = false,
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scroll_debounce = 0,
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pointer_events_set = false,
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scrollEv = function() {
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// fixes scrolling issue on Mac #3
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if (is_mac) {
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if( ! pointer_events_set) self.content_elem.style.pointerEvents = 'none';
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pointer_events_set = true;
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clearTimeout(scroll_debounce);
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scroll_debounce = setTimeout(function () {
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self.content_elem.style.pointerEvents = 'auto';
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pointer_events_set = false;
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}, 50);
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}
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if (last_cluster != (last_cluster = self.getClusterNum()))
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self.insertToDOM(rows, cache);
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if (self.options.callbacks.scrollingProgress)
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self.options.callbacks.scrollingProgress(self.getScrollProgress());
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},
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resize_debounce = 0,
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resizeEv = function() {
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clearTimeout(resize_debounce);
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resize_debounce = setTimeout(self.refresh, 100);
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}
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on('scroll', self.scroll_elem, scrollEv);
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on('resize', window, resizeEv);
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// public methods
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self.destroy = function(clean) {
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off('scroll', self.scroll_elem, scrollEv);
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off('resize', window, resizeEv);
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self.html((clean ? self.generateEmptyRow() : rows).join(''));
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}
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self.refresh = function(force) {
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if(self.getRowsHeight(rows) || force) self.update(rows);
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}
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self.update = function(new_rows) {
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rows = isArray(new_rows)
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? new_rows
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: [];
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var scroll_top = self.scroll_elem.scrollTop;
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// fixes #39
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if(rows.length * self.options.item_height < scroll_top) {
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self.scroll_elem.scrollTop = 0;
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last_cluster = 0;
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}
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self.insertToDOM(rows, cache);
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self.scroll_elem.scrollTop = scroll_top;
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}
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self.clear = function() {
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self.update([]);
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}
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self.getRowsAmount = function() {
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return rows.length;
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}
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self.getScrollProgress = function() {
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return this.options.scroll_top / (rows.length * this.options.item_height) * 100 || 0;
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}
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var add = function(where, _new_rows) {
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var new_rows = isArray(_new_rows)
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? _new_rows
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: [];
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if( ! new_rows.length) return;
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rows = where == 'append'
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? rows.concat(new_rows)
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: new_rows.concat(rows);
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self.insertToDOM(rows, cache);
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}
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self.append = function(rows) {
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add('append', rows);
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}
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self.prepend = function(rows) {
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add('prepend', rows);
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}
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}
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Clusterize.prototype = {
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constructor: Clusterize,
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// fetch existing markup
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fetchMarkup: function() {
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var rows = [], rows_nodes = this.getChildNodes(this.content_elem);
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while (rows_nodes.length) {
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rows.push(rows_nodes.shift().outerHTML);
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}
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return rows;
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},
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// get tag name, content tag name, tag height, calc cluster height
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exploreEnvironment: function(rows, cache) {
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var opts = this.options;
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opts.content_tag = this.content_elem.tagName.toLowerCase();
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if( ! rows.length) return;
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if(ie && ie <= 9 && ! opts.tag) opts.tag = rows[0].match(/<([^>\s/]*)/)[1].toLowerCase();
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if(this.content_elem.children.length <= 1) cache.data = this.html(rows[0] + rows[0] + rows[0]);
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if( ! opts.tag) opts.tag = this.content_elem.children[0].tagName.toLowerCase();
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this.getRowsHeight(rows);
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},
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getRowsHeight: function(rows) {
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var opts = this.options,
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prev_item_height = opts.item_height;
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opts.cluster_height = 0;
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if( ! rows.length) return;
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var nodes = this.content_elem.children;
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var node = nodes[Math.floor(nodes.length / 2)];
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opts.item_height = node.offsetHeight;
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// consider table's border-spacing
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if(opts.tag == 'tr' && getStyle('borderCollapse', this.content_elem) != 'collapse')
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opts.item_height += parseInt(getStyle('borderSpacing', this.content_elem), 10) || 0;
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// consider margins (and margins collapsing)
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if(opts.tag != 'tr') {
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var marginTop = parseInt(getStyle('marginTop', node), 10) || 0;
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var marginBottom = parseInt(getStyle('marginBottom', node), 10) || 0;
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opts.item_height += Math.max(marginTop, marginBottom);
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}
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opts.block_height = opts.item_height * opts.rows_in_block;
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opts.rows_in_cluster = opts.blocks_in_cluster * opts.rows_in_block;
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opts.cluster_height = opts.blocks_in_cluster * opts.block_height;
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return prev_item_height != opts.item_height;
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},
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// get current cluster number
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getClusterNum: function () {
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this.options.scroll_top = this.scroll_elem.scrollTop;
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return Math.floor(this.options.scroll_top / (this.options.cluster_height - this.options.block_height)) || 0;
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},
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// generate empty row if no data provided
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generateEmptyRow: function() {
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var opts = this.options;
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if( ! opts.tag || ! opts.show_no_data_row) return [];
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var empty_row = document.createElement(opts.tag),
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no_data_content = document.createTextNode(opts.no_data_text), td;
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empty_row.className = opts.no_data_class;
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if(opts.tag == 'tr') {
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td = document.createElement('td');
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// fixes #53
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td.colSpan = 100;
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td.appendChild(no_data_content);
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}
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empty_row.appendChild(td || no_data_content);
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return [empty_row.outerHTML];
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},
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// generate cluster for current scroll position
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generate: function (rows, cluster_num) {
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var opts = this.options,
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rows_len = rows.length;
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if (rows_len < opts.rows_in_block) {
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return {
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top_offset: 0,
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bottom_offset: 0,
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rows_above: 0,
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rows: rows_len ? rows : this.generateEmptyRow()
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}
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}
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var items_start = Math.max((opts.rows_in_cluster - opts.rows_in_block) * cluster_num, 0),
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items_end = items_start + opts.rows_in_cluster,
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top_offset = Math.max(items_start * opts.item_height, 0),
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bottom_offset = Math.max((rows_len - items_end) * opts.item_height, 0),
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this_cluster_rows = [],
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rows_above = items_start;
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if(top_offset < 1) {
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rows_above++;
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}
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for (var i = items_start; i < items_end; i++) {
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rows[i] && this_cluster_rows.push(rows[i]);
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}
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return {
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top_offset: top_offset,
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bottom_offset: bottom_offset,
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rows_above: rows_above,
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rows: this_cluster_rows
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}
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},
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renderExtraTag: function(class_name, height) {
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var tag = document.createElement(this.options.tag),
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clusterize_prefix = 'clusterize-';
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tag.className = [clusterize_prefix + 'extra-row', clusterize_prefix + class_name].join(' ');
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height && (tag.style.height = height + 'px');
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return tag.outerHTML;
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},
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// if necessary verify data changed and insert to DOM
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insertToDOM: function(rows, cache) {
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// explore row's height
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if( ! this.options.cluster_height) {
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this.exploreEnvironment(rows, cache);
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}
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var data = this.generate(rows, this.getClusterNum()),
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this_cluster_rows = data.rows.join(''),
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this_cluster_content_changed = this.checkChanges('data', this_cluster_rows, cache),
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top_offset_changed = this.checkChanges('top', data.top_offset, cache),
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only_bottom_offset_changed = this.checkChanges('bottom', data.bottom_offset, cache),
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callbacks = this.options.callbacks,
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layout = [];
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if(this_cluster_content_changed || top_offset_changed) {
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if(data.top_offset) {
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this.options.keep_parity && layout.push(this.renderExtraTag('keep-parity'));
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layout.push(this.renderExtraTag('top-space', data.top_offset));
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}
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layout.push(this_cluster_rows);
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data.bottom_offset && layout.push(this.renderExtraTag('bottom-space', data.bottom_offset));
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callbacks.clusterWillChange && callbacks.clusterWillChange();
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this.html(layout.join(''));
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this.options.content_tag == 'ol' && this.content_elem.setAttribute('start', data.rows_above);
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callbacks.clusterChanged && callbacks.clusterChanged();
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} else if(only_bottom_offset_changed) {
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this.content_elem.lastChild.style.height = data.bottom_offset + 'px';
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}
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},
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// unfortunately ie <= 9 does not allow to use innerHTML for table elements, so make a workaround
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html: function(data) {
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var content_elem = this.content_elem;
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if(ie && ie <= 9 && this.options.tag == 'tr') {
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var div = document.createElement('div'), last;
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div.innerHTML = '<table><tbody>' + data + '</tbody></table>';
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while((last = content_elem.lastChild)) {
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content_elem.removeChild(last);
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}
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var rows_nodes = this.getChildNodes(div.firstChild.firstChild);
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while (rows_nodes.length) {
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content_elem.appendChild(rows_nodes.shift());
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}
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} else {
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content_elem.innerHTML = data;
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}
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},
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getChildNodes: function(tag) {
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var child_nodes = tag.children, nodes = [];
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for (var i = 0, ii = child_nodes.length; i < ii; i++) {
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nodes.push(child_nodes[i]);
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}
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return nodes;
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},
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checkChanges: function(type, value, cache) {
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var changed = value != cache[type];
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cache[type] = value;
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return changed;
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}
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}
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// support functions
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function on(evt, element, fnc) {
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return element.addEventListener ? element.addEventListener(evt, fnc, false) : element.attachEvent("on" + evt, fnc);
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}
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function off(evt, element, fnc) {
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return element.removeEventListener ? element.removeEventListener(evt, fnc, false) : element.detachEvent("on" + evt, fnc);
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}
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function isArray(arr) {
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return Object.prototype.toString.call(arr) === '[object Array]';
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}
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function getStyle(prop, elem) {
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return window.getComputedStyle ? window.getComputedStyle(elem)[prop] : elem.currentStyle[prop];
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}
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return Clusterize;
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})); |