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