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