var Hammer = require('../../../module/hammer'); var Item = require('./Item'); /** * @constructor RangeItem * @extends Item * @param {Object} data Object containing parameters start, end * content, className. * @param {{toScreen: function, toTime: function}} conversion * Conversion functions from time to screen and vice versa * @param {Object} [options] Configuration options * // TODO: describe options */ function RangeItem (data, conversion, options) { this.props = { content: { width: 0 } }; this.overflow = false; // if contents can overflow (css styling), this flag is set to true // validate data if (data) { if (data.start == undefined) { throw new Error('Property "start" missing in item ' + data.id); } if (data.end == undefined) { throw new Error('Property "end" missing in item ' + data.id); } } Item.call(this, data, conversion, options); } RangeItem.prototype = new Item (null, null, null); RangeItem.prototype.baseClassName = 'item range'; /** * Check whether this item is visible inside given range * @returns {{start: Number, end: Number}} range with a timestamp for start and end * @returns {boolean} True if visible */ RangeItem.prototype.isVisible = function(range) { // determine visibility return (this.data.start < range.end) && (this.data.end > range.start); }; /** * Repaint the item */ RangeItem.prototype.redraw = function() { var dom = this.dom; if (!dom) { // create DOM this.dom = {}; dom = this.dom; // background box dom.box = document.createElement('div'); // className is updated in redraw() // contents box dom.content = document.createElement('div'); dom.content.className = 'content'; dom.box.appendChild(dom.content); // attach this item as attribute dom.box['timeline-item'] = this; this.dirty = true; } // append DOM to parent DOM if (!this.parent) { throw new Error('Cannot redraw item: no parent attached'); } if (!dom.box.parentNode) { var foreground = this.parent.dom.foreground; if (!foreground) { throw new Error('Cannot redraw item: parent has no foreground container element'); } foreground.appendChild(dom.box); } this.displayed = true; // Update DOM when item is marked dirty. An item is marked dirty when: // - the item is not yet rendered // - the item's data is changed // - the item is selected/deselected if (this.dirty) { this._updateContents(this.dom.content); this._updateTitle(this.dom.box); this._updateDataAttributes(this.dom.box); this._updateStyle(this.dom.box); // update class var className = (this.data.className ? (' ' + this.data.className) : '') + (this.selected ? ' selected' : ''); dom.box.className = this.baseClassName + className; // determine from css whether this box has overflow this.overflow = window.getComputedStyle(dom.content).overflow !== 'hidden'; // recalculate size // turn off max-width to be able to calculate the real width // this causes an extra browser repaint/reflow, but so be it this.dom.content.style.maxWidth = 'none'; this.props.content.width = this.dom.content.offsetWidth; this.height = this.dom.box.offsetHeight; this.dom.content.style.maxWidth = ''; this.dirty = false; } this._repaintDeleteButton(dom.box); this._repaintDragLeft(); this._repaintDragRight(); }; /** * Show the item in the DOM (when not already visible). The items DOM will * be created when needed. */ RangeItem.prototype.show = function() { if (!this.displayed) { this.redraw(); } }; /** * Hide the item from the DOM (when visible) * @return {Boolean} changed */ RangeItem.prototype.hide = function() { if (this.displayed) { var box = this.dom.box; if (box.parentNode) { box.parentNode.removeChild(box); } this.top = null; this.left = null; this.displayed = false; } }; /** * Reposition the item horizontally * @Override */ RangeItem.prototype.repositionX = function() { var parentWidth = this.parent.width; var start = this.conversion.toScreen(this.data.start); var end = this.conversion.toScreen(this.data.end); var contentLeft; var contentWidth; // limit the width of the this, as browsers cannot draw very wide divs if (start < -parentWidth) { start = -parentWidth; } if (end > 2 * parentWidth) { end = 2 * parentWidth; } var boxWidth = Math.max(end - start, 1); if (this.overflow) { this.left = start; this.width = boxWidth + this.props.content.width; contentWidth = this.props.content.width; // Note: The calculation of width is an optimistic calculation, giving // a width which will not change when moving the Timeline // So no re-stacking needed, which is nicer for the eye; } else { this.left = start; this.width = boxWidth; contentWidth = Math.min(end - start - 2 * this.options.padding, this.props.content.width); } this.dom.box.style.left = this.left + 'px'; this.dom.box.style.width = boxWidth + 'px'; switch (this.options.align) { case 'left': this.dom.content.style.left = '0'; break; case 'right': this.dom.content.style.left = Math.max((boxWidth - contentWidth - 2 * this.options.padding), 0) + 'px'; break; case 'center': this.dom.content.style.left = Math.max((boxWidth - contentWidth - 2 * this.options.padding) / 2, 0) + 'px'; break; default: // 'auto' // when range exceeds left of the window, position the contents at the left of the visible area if (this.overflow) { if (end > 0) { contentLeft = Math.max(-start, 0); } else { contentLeft = -contentWidth; // ensure it's not visible anymore } } else { if (start < 0) { contentLeft = Math.min(-start, (end - start - contentWidth - 2 * this.options.padding)); // TODO: remove the need for options.padding. it's terrible. } else { contentLeft = 0; } } this.dom.content.style.left = contentLeft + 'px'; } }; /** * Reposition the item vertically * @Override */ RangeItem.prototype.repositionY = function() { var orientation = this.options.orientation, box = this.dom.box; if (orientation == 'top') { box.style.top = this.top + 'px'; } else { box.style.top = (this.parent.height - this.top - this.height) + 'px'; } }; /** * Repaint a drag area on the left side of the range when the range is selected * @protected */ RangeItem.prototype._repaintDragLeft = function () { if (this.selected && this.options.editable.updateTime && !this.dom.dragLeft) { // create and show drag area var dragLeft = document.createElement('div'); dragLeft.className = 'drag-left'; dragLeft.dragLeftItem = this; // TODO: this should be redundant? Hammer(dragLeft, { preventDefault: true }).on('drag', function () { //console.log('drag left') }); this.dom.box.appendChild(dragLeft); this.dom.dragLeft = dragLeft; } else if (!this.selected && this.dom.dragLeft) { // delete drag area if (this.dom.dragLeft.parentNode) { this.dom.dragLeft.parentNode.removeChild(this.dom.dragLeft); } this.dom.dragLeft = null; } }; /** * Repaint a drag area on the right side of the range when the range is selected * @protected */ RangeItem.prototype._repaintDragRight = function () { if (this.selected && this.options.editable.updateTime && !this.dom.dragRight) { // create and show drag area var dragRight = document.createElement('div'); dragRight.className = 'drag-right'; dragRight.dragRightItem = this; // TODO: this should be redundant? Hammer(dragRight, { preventDefault: true }).on('drag', function () { //console.log('drag right') }); this.dom.box.appendChild(dragRight); this.dom.dragRight = dragRight; } else if (!this.selected && this.dom.dragRight) { // delete drag area if (this.dom.dragRight.parentNode) { this.dom.dragRight.parentNode.removeChild(this.dom.dragRight); } this.dom.dragRight = null; } }; module.exports = RangeItem;