var util = require('../../util'); var stack = require('../Stack'); var RangeItem = require('./item/RangeItem'); /** * @constructor Group * @param {Number | String} groupId * @param {Object} data * @param {ItemSet} itemSet */ function Group (groupId, data, itemSet) { this.groupId = groupId; this.subgroups = {}; this.subgroupIndex = 0; this.subgroupOrderer = data && data.subgroupOrder; this.itemSet = itemSet; this.dom = {}; this.props = { label: { width: 0, height: 0 } }; this.className = null; this.items = {}; // items filtered by groupId of this group this.visibleItems = []; // items currently visible in window this.orderedItems = { byStart: [], byEnd: [] }; this.checkRangedItems = false; // needed to refresh the ranged items if the window is programatically changed with NO overlap. var me = this; this.itemSet.body.emitter.on("checkRangedItems", function () { me.checkRangedItems = true; }) this._create(); this.setData(data); } /** * Create DOM elements for the group * @private */ Group.prototype._create = function() { var label = document.createElement('div'); label.className = 'vis-label'; this.dom.label = label; var inner = document.createElement('div'); inner.className = 'vis-inner'; label.appendChild(inner); this.dom.inner = inner; var foreground = document.createElement('div'); foreground.className = 'vis-group'; foreground['timeline-group'] = this; this.dom.foreground = foreground; this.dom.background = document.createElement('div'); this.dom.background.className = 'vis-group'; this.dom.axis = document.createElement('div'); this.dom.axis.className = 'vis-group'; // create a hidden marker to detect when the Timelines container is attached // to the DOM, or the style of a parent of the Timeline is changed from // display:none is changed to visible. this.dom.marker = document.createElement('div'); this.dom.marker.style.visibility = 'hidden'; this.dom.marker.innerHTML = '?'; this.dom.background.appendChild(this.dom.marker); }; /** * Set the group data for this group * @param {Object} data Group data, can contain properties content and className */ Group.prototype.setData = function(data) { // update contents var content = data && data.content; if (content instanceof Element) { this.dom.inner.appendChild(content); } else if (content !== undefined && content !== null) { this.dom.inner.innerHTML = content; } else { this.dom.inner.innerHTML = this.groupId || ''; // groupId can be null } // update title this.dom.label.title = data && data.title || ''; if (!this.dom.inner.firstChild) { util.addClassName(this.dom.inner, 'vis-hidden'); } else { util.removeClassName(this.dom.inner, 'vis-hidden'); } // update className var className = data && data.className || null; if (className != this.className) { if (this.className) { util.removeClassName(this.dom.label, this.className); util.removeClassName(this.dom.foreground, this.className); util.removeClassName(this.dom.background, this.className); util.removeClassName(this.dom.axis, this.className); } util.addClassName(this.dom.label, className); util.addClassName(this.dom.foreground, className); util.addClassName(this.dom.background, className); util.addClassName(this.dom.axis, className); this.className = className; } // update style if (this.style) { util.removeCssText(this.dom.label, 'vis-' + this.style); this.style = null; } if (data && data.style) { util.addCssText(this.dom.label, 'vis-' + data.style); this.style = data.style; } }; /** * Get the width of the group label * @return {number} width */ Group.prototype.getLabelWidth = function() { return this.props.label.width; }; /** * Repaint this group * @param {{start: number, end: number}} range * @param {{item: {horizontal: number, vertical: number}, axis: number}} margin * @param {boolean} [restack=false] Force restacking of all items * @return {boolean} Returns true if the group is resized */ Group.prototype.redraw = function(range, margin, restack) { var resized = false; // force recalculation of the height of the items when the marker height changed // (due to the Timeline being attached to the DOM or changed from display:none to visible) var markerHeight = this.dom.marker.clientHeight; if (markerHeight != this.lastMarkerHeight) { this.lastMarkerHeight = markerHeight; util.forEach(this.items, function (item) { item.dirty = true; if (item.displayed) item.redraw(); }); restack = true; } // reposition visible items vertically if (typeof this.itemSet.options.order === 'function') { // a custom order function if (restack) { // brute force restack of all items // show all items var me = this; var limitSize = false; util.forEach(this.items, function (item) { if (!item.displayed) { item.redraw(); me.visibleItems.push(item); } item.repositionX(limitSize); }); // order all items and force a restacking var customOrderedItems = this.orderedItems.byStart.slice().sort(function (a, b) { return me.itemSet.options.order(a.data, b.data); }); stack.stack(customOrderedItems, margin, true /* restack=true */); } this.visibleItems = this._updateVisibleItems(this.orderedItems, this.visibleItems, range); } else { // no custom order function, lazy stacking this.visibleItems = this._updateVisibleItems(this.orderedItems, this.visibleItems, range); if (this.itemSet.options.stack) { // TODO: ugly way to access options... stack.stack(this.visibleItems, margin, restack); } else { // no stacking stack.nostack(this.visibleItems, margin, this.subgroups); } } // recalculate the height of the group var height = this._calculateHeight(margin); // calculate actual size and position var foreground = this.dom.foreground; this.top = foreground.offsetTop; this.left = foreground.offsetLeft; this.width = foreground.offsetWidth; resized = util.updateProperty(this, 'height', height) || resized; // recalculate size of label resized = util.updateProperty(this.props.label, 'width', this.dom.inner.clientWidth) || resized; resized = util.updateProperty(this.props.label, 'height', this.dom.inner.clientHeight) || resized; // apply new height this.dom.background.style.height = height + 'px'; this.dom.foreground.style.height = height + 'px'; this.dom.label.style.height = height + 'px'; // update vertical position of items after they are re-stacked and the height of the group is calculated for (var i = 0, ii = this.visibleItems.length; i < ii; i++) { var item = this.visibleItems[i]; item.repositionY(margin); } return resized; }; /** * recalculate the height of the group * @param {{item: {horizontal: number, vertical: number}, axis: number}} margin * @returns {number} Returns the height * @private */ Group.prototype._calculateHeight = function (margin) { // recalculate the height of the group var height; var visibleItems = this.visibleItems; //var visibleSubgroups = []; //this.visibleSubgroups = 0; this.resetSubgroups(); var me = this; if (visibleItems.length > 0) { var min = visibleItems[0].top; var max = visibleItems[0].top + visibleItems[0].height; util.forEach(visibleItems, function (item) { min = Math.min(min, item.top); max = Math.max(max, (item.top + item.height)); if (item.data.subgroup !== undefined) { me.subgroups[item.data.subgroup].height = Math.max(me.subgroups[item.data.subgroup].height,item.height); me.subgroups[item.data.subgroup].visible = true; } }); if (min > margin.axis) { // there is an empty gap between the lowest item and the axis var offset = min - margin.axis; max -= offset; util.forEach(visibleItems, function (item) { item.top -= offset; }); } height = max + margin.item.vertical / 2; } else { height = 0; } height = Math.max(height, this.props.label.height); return height; }; /** * Show this group: attach to the DOM */ Group.prototype.show = function() { if (!this.dom.label.parentNode) { this.itemSet.dom.labelSet.appendChild(this.dom.label); } if (!this.dom.foreground.parentNode) { this.itemSet.dom.foreground.appendChild(this.dom.foreground); } if (!this.dom.background.parentNode) { this.itemSet.dom.background.appendChild(this.dom.background); } if (!this.dom.axis.parentNode) { this.itemSet.dom.axis.appendChild(this.dom.axis); } }; /** * Hide this group: remove from the DOM */ Group.prototype.hide = function() { var label = this.dom.label; if (label.parentNode) { label.parentNode.removeChild(label); } var foreground = this.dom.foreground; if (foreground.parentNode) { foreground.parentNode.removeChild(foreground); } var background = this.dom.background; if (background.parentNode) { background.parentNode.removeChild(background); } var axis = this.dom.axis; if (axis.parentNode) { axis.parentNode.removeChild(axis); } }; /** * Add an item to the group * @param {Item} item */ Group.prototype.add = function(item) { this.items[item.id] = item; item.setParent(this); // add to if (item.data.subgroup !== undefined) { if (this.subgroups[item.data.subgroup] === undefined) { this.subgroups[item.data.subgroup] = {height:0, visible: false, index:this.subgroupIndex, items: []}; this.subgroupIndex++; } this.subgroups[item.data.subgroup].items.push(item); } this.orderSubgroups(); if (this.visibleItems.indexOf(item) == -1) { var range = this.itemSet.body.range; // TODO: not nice accessing the range like this this._checkIfVisible(item, this.visibleItems, range); } }; Group.prototype.orderSubgroups = function() { if (this.subgroupOrderer !== undefined) { var sortArray = []; if (typeof this.subgroupOrderer == 'string') { for (var subgroup in this.subgroups) { sortArray.push({subgroup: subgroup, sortField: this.subgroups[subgroup].items[0].data[this.subgroupOrderer]}) } sortArray.sort(function (a, b) { return a.sortField - b.sortField; }) } else if (typeof this.subgroupOrderer == 'function') { for (var subgroup in this.subgroups) { sortArray.push(this.subgroups[subgroup].items[0].data); } sortArray.sort(this.subgroupOrderer); } if (sortArray.length > 0) { for (var i = 0; i < sortArray.length; i++) { this.subgroups[sortArray[i].subgroup].index = i; } } } }; Group.prototype.resetSubgroups = function() { for (var subgroup in this.subgroups) { if (this.subgroups.hasOwnProperty(subgroup)) { this.subgroups[subgroup].visible = false; } } }; /** * Remove an item from the group * @param {Item} item */ Group.prototype.remove = function(item) { delete this.items[item.id]; item.setParent(null); // remove from visible items var index = this.visibleItems.indexOf(item); if (index != -1) this.visibleItems.splice(index, 1); // TODO: also remove from ordered items? }; /** * Remove an item from the corresponding DataSet * @param {Item} item */ Group.prototype.removeFromDataSet = function(item) { this.itemSet.removeItem(item.id); }; /** * Reorder the items */ Group.prototype.order = function() { var array = util.toArray(this.items); var startArray = []; var endArray = []; for (var i = 0; i < array.length; i++) { if (array[i].data.end !== undefined) { endArray.push(array[i]); } startArray.push(array[i]); } this.orderedItems = { byStart: startArray, byEnd: endArray }; stack.orderByStart(this.orderedItems.byStart); stack.orderByEnd(this.orderedItems.byEnd); }; /** * Update the visible items * @param {{byStart: Item[], byEnd: Item[]}} orderedItems All items ordered by start date and by end date * @param {Item[]} visibleItems The previously visible items. * @param {{start: number, end: number}} range Visible range * @return {Item[]} visibleItems The new visible items. * @private */ Group.prototype._updateVisibleItems = function(orderedItems, oldVisibleItems, range) { var visibleItems = []; var visibleItemsLookup = {}; // we keep this to quickly look up if an item already exists in the list without using indexOf on visibleItems var interval = (range.end - range.start) / 4; var lowerBound = range.start - interval; var upperBound = range.end + interval; var item, i; // this function is used to do the binary search. var searchFunction = function (value) { if (value < lowerBound) {return -1;} else if (value <= upperBound) {return 0;} else {return 1;} } // first check if the items that were in view previously are still in view. // IMPORTANT: this handles the case for the items with startdate before the window and enddate after the window! // also cleans up invisible items. if (oldVisibleItems.length > 0) { for (i = 0; i < oldVisibleItems.length; i++) { this._checkIfVisibleWithReference(oldVisibleItems[i], visibleItems, visibleItemsLookup, range); } } // we do a binary search for the items that have only start values. var initialPosByStart = util.binarySearchCustom(orderedItems.byStart, searchFunction, 'data','start'); // trace the visible items from the inital start pos both ways until an invisible item is found, we only look at the start values. this._traceVisible(initialPosByStart, orderedItems.byStart, visibleItems, visibleItemsLookup, function (item) { return (item.data.start < lowerBound || item.data.start > upperBound); }); // if the window has changed programmatically without overlapping the old window, the ranged items with start < lowerBound and end > upperbound are not shown. // We therefore have to brute force check all items in the byEnd list if (this.checkRangedItems == true) { this.checkRangedItems = false; for (i = 0; i < orderedItems.byEnd.length; i++) { this._checkIfVisibleWithReference(orderedItems.byEnd[i], visibleItems, visibleItemsLookup, range); } } else { // we do a binary search for the items that have defined end times. var initialPosByEnd = util.binarySearchCustom(orderedItems.byEnd, searchFunction, 'data','end'); // trace the visible items from the inital start pos both ways until an invisible item is found, we only look at the end values. this._traceVisible(initialPosByEnd, orderedItems.byEnd, visibleItems, visibleItemsLookup, function (item) { return (item.data.end < lowerBound || item.data.end > upperBound); }); } // finally, we reposition all the visible items. for (i = 0; i < visibleItems.length; i++) { item = visibleItems[i]; if (!item.displayed) item.show(); // reposition item horizontally item.repositionX(); } // debug //console.log("new line") //if (this.groupId == null) { // for (i = 0; i < orderedItems.byStart.length; i++) { // item = orderedItems.byStart[i].data; // console.log('start',i,initialPosByStart, item.start.valueOf(), item.content, item.start >= lowerBound && item.start <= upperBound,i == initialPosByStart ? "<------------------- HEREEEE" : "") // } // for (i = 0; i < orderedItems.byEnd.length; i++) { // item = orderedItems.byEnd[i].data; // console.log('rangeEnd',i,initialPosByEnd, item.end.valueOf(), item.content, item.end >= range.start && item.end <= range.end,i == initialPosByEnd ? "<------------------- HEREEEE" : "") // } //} return visibleItems; }; Group.prototype._traceVisible = function (initialPos, items, visibleItems, visibleItemsLookup, breakCondition) { var item; var i; if (initialPos != -1) { for (i = initialPos; i >= 0; i--) { item = items[i]; if (breakCondition(item)) { break; } else { if (visibleItemsLookup[item.id] === undefined) { visibleItemsLookup[item.id] = true; visibleItems.push(item); } } } for (i = initialPos + 1; i < items.length; i++) { item = items[i]; if (breakCondition(item)) { break; } else { if (visibleItemsLookup[item.id] === undefined) { visibleItemsLookup[item.id] = true; visibleItems.push(item); } } } } } /** * this function is very similar to the _checkIfInvisible() but it does not * return booleans, hides the item if it should not be seen and always adds to * the visibleItems. * this one is for brute forcing and hiding. * * @param {Item} item * @param {Array} visibleItems * @param {{start:number, end:number}} range * @private */ Group.prototype._checkIfVisible = function(item, visibleItems, range) { if (item.isVisible(range)) { if (!item.displayed) item.show(); // reposition item horizontally item.repositionX(); visibleItems.push(item); } else { if (item.displayed) item.hide(); } }; /** * this function is very similar to the _checkIfInvisible() but it does not * return booleans, hides the item if it should not be seen and always adds to * the visibleItems. * this one is for brute forcing and hiding. * * @param {Item} item * @param {Array} visibleItems * @param {{start:number, end:number}} range * @private */ Group.prototype._checkIfVisibleWithReference = function(item, visibleItems, visibleItemsLookup, range) { if (item.isVisible(range)) { if (visibleItemsLookup[item.id] === undefined) { visibleItemsLookup[item.id] = true; visibleItems.push(item); } } else { if (item.displayed) item.hide(); } }; module.exports = Group;