382 lines
11 KiB
JavaScript
382 lines
11 KiB
JavaScript
/* global $, interfaceConfig */
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/**
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* Associates the default display type with corresponding CSS class
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*/
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const SHOW_CLASSES = {
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'block': 'show',
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'inline': 'show-inline',
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'list-item': 'show-list-item'
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};
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/**
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* Contains sizes of thumbnails
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* @type {{SMALL: number, MEDIUM: number}}
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*/
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const ThumbnailSizes = {
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SMALL: 60,
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MEDIUM: 80
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};
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/**
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* Contains font sizes for thumbnail indicators
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* @type {{SMALL: number, MEDIUM: number}}
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*/
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const IndicatorFontSizes = {
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SMALL: 5,
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MEDIUM: 6,
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NORMAL: 8
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};
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/**
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* Created by hristo on 12/22/14.
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*/
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const UIUtil = {
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/**
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* Returns the available video width.
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*/
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getAvailableVideoWidth() {
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return window.innerWidth;
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},
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/**
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* Changes the style class of the element given by id.
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*/
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buttonClick(id, classname) {
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// add the class to the clicked element
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$(`#${id}`).toggleClass(classname);
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},
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/**
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* Returns the text width for the given element.
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*
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* @param el the element
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*/
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getTextWidth(el) {
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return el.clientWidth + 1;
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},
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/**
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* Returns the text height for the given element.
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*
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* @param el the element
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*/
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getTextHeight(el) {
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return el.clientHeight + 1;
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},
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/**
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* Escapes the given text.
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*/
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escapeHtml(unsafeText) {
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return $('<div/>').text(unsafeText)
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.html();
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},
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/**
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* Unescapes the given text.
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*
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* @param {string} safe string which contains escaped html
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* @returns {string} unescaped html string.
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*/
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unescapeHtml(safe) {
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return $('<div />').html(safe)
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.text();
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},
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imageToGrayScale(canvas) {
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const context = canvas.getContext('2d');
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const imgData = context.getImageData(0, 0, canvas.width, canvas.height);
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const pixels = imgData.data;
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for (let i = 0, n = pixels.length; i < n; i += 4) {
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const grayscale
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= (pixels[i] * 0.3)
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+ (pixels[i + 1] * 0.59)
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+ (pixels[i + 2] * 0.11);
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pixels[i] = grayscale; // red
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pixels[i + 1] = grayscale; // green
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pixels[i + 2] = grayscale; // blue
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// pixels[i+3] is alpha
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}
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// redraw the image in black & white
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context.putImageData(imgData, 0, 0);
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},
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/**
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* Inserts given child element as the first one into the container.
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* @param container the container to which new child element will be added
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* @param newChild the new element that will be inserted into the container
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*/
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prependChild(container, newChild) {
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const firstChild = container.childNodes[0];
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if (firstChild) {
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container.insertBefore(newChild, firstChild);
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} else {
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container.appendChild(newChild);
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}
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},
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/**
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* Indicates if the setting section is enabled.
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*
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* @param name the name of the setting section as defined in
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* interface_config.js and SettingsMenu.js
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* @returns {boolean} {true} to indicate that the given setting section
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* is enabled, {false} - otherwise
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*/
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isSettingEnabled(name) {
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return interfaceConfig.SETTINGS_SECTIONS.indexOf(name) !== -1;
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},
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/**
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* Indicates if Authentication Section should be shown
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*
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* @returns {boolean}
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*/
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isAuthenticationEnabled() {
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return interfaceConfig.AUTHENTICATION_ENABLE;
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},
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/**
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* Shows / hides the element given by id.
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*
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* @param {string|HTMLElement} idOrElement the identifier or the element
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* to show/hide
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* @param {boolean} show <tt>true</tt> to show or <tt>false</tt> to hide
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*/
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setVisible(id, visible) {
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let element;
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if (id instanceof HTMLElement) {
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element = id;
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} else {
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element = document.getElementById(id);
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}
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if (!element) {
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return;
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}
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if (!visible) {
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element.classList.add('hide');
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} else if (element.classList.contains('hide')) {
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element.classList.remove('hide');
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}
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const type = this._getElementDefaultDisplay(element.tagName);
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const className = SHOW_CLASSES[type];
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if (visible) {
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element.classList.add(className);
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} else if (element.classList.contains(className)) {
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element.classList.remove(className);
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}
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},
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/**
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* Returns default display style for the tag
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* @param tag
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* @returns {*}
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* @private
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*/
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_getElementDefaultDisplay(tag) {
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const tempElement = document.createElement(tag);
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document.body.appendChild(tempElement);
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const style = window.getComputedStyle(tempElement).display;
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document.body.removeChild(tempElement);
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return style;
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},
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/**
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* Shows / hides the element with the given jQuery selector.
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*
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* @param {jQuery} jquerySelector the jQuery selector of the element to
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* show / shide
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* @param {boolean} isVisible
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*/
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setVisibleBySelector(jquerySelector, isVisible) {
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if (jquerySelector && jquerySelector.length > 0) {
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jquerySelector.css('visibility', isVisible ? 'visible' : 'hidden');
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}
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},
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/**
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* Redirects to a given URL.
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*
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* @param {string} url - The redirect URL.
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* NOTE: Currently used to redirect to 3rd party location for
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* authentication. In most cases redirectWithStoredParams action must be
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* used instead of this method in order to preserve curent URL params.
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*/
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redirect(url) {
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window.location.href = url;
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},
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/**
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* Indicates if we're currently in full screen mode.
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*
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* @return {boolean} {true} to indicate that we're currently in full screen
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* mode, {false} otherwise
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*/
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isFullScreen() {
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return document.fullscreenElement
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|| document.mozFullScreenElement
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|| document.webkitFullscreenElement
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|| document.msFullscreenElement;
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},
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/**
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* Exits full screen mode.
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* @see https://developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API
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*/
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exitFullScreen() {
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if (document.exitFullscreen) {
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document.exitFullscreen();
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} else if (document.msExitFullscreen) {
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document.msExitFullscreen();
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} else if (document.mozCancelFullScreen) {
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document.mozCancelFullScreen();
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} else if (document.webkitExitFullscreen) {
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document.webkitExitFullscreen();
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}
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},
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/**
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* Enter full screen mode.
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* @see https://developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API
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*/
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enterFullScreen() {
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if (document.documentElement.requestFullscreen) {
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document.documentElement.requestFullscreen();
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} else if (document.documentElement.msRequestFullscreen) {
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document.documentElement.msRequestFullscreen();
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} else if (document.documentElement.mozRequestFullScreen) {
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document.documentElement.mozRequestFullScreen();
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} else if (document.documentElement.webkitRequestFullscreen) {
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document.documentElement
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.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
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}
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},
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/**
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* Create html attributes string out of object properties.
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* @param {Object} attrs object with properties
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* @returns {String} string of html element attributes
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*/
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attrsToString(attrs) {
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return (
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Object.keys(attrs).map(key => ` ${key}="${attrs[key]}"`)
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.join(' '));
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},
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/**
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* Checks if the given DOM element is currently visible. The offsetParent
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* will be null if the "display" property of the element or any of its
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* parent containers is set to "none". This method will NOT check the
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* visibility property though.
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* @param {el} The DOM element we'd like to check for visibility
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*/
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isVisible(el) {
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return el.offsetParent !== null;
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},
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/**
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* Shows / hides the element given by {selector} and sets a timeout if the
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* {hideDelay} is set to a value > 0.
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* @param selector the jquery selector of the element to show/hide.
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* @param show a {boolean} that indicates if the element should be shown or
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* hidden
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* @param hideDelay the value in milliseconds to wait before hiding the
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* element
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*/
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animateShowElement(selector, show, hideDelay) {
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if (show) {
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if (!selector.is(':visible')) {
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selector.css('display', 'inline-block');
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}
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selector.fadeIn(300,
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() => {
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selector.css({ opacity: 1 });
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}
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);
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if (hideDelay && hideDelay > 0) {
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setTimeout(
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() => {
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selector.fadeOut(
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300,
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() => {
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selector.css({ opacity: 0 });
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});
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},
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hideDelay);
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}
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} else {
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selector.fadeOut(300,
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() => {
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selector.css({ opacity: 0 });
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}
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);
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}
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},
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/**
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* Parses the given cssValue as an Integer. If the value is not a number
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* we return 0 instead of NaN.
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* @param cssValue the string value we obtain when querying css properties
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*/
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parseCssInt(cssValue) {
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return parseInt(cssValue, 10) || 0;
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},
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/**
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* Adds href value to 'a' link jquery object. If link value is null,
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* undefined or empty string, disables the link.
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* @param {object} aLinkElement the jquery object
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* @param {string} link the link value
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*/
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setLinkHref(aLinkElement, link) {
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if (link) {
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aLinkElement.attr('href', link);
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} else {
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aLinkElement.css({
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'pointer-events': 'none',
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'cursor': 'default'
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});
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}
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},
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/**
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* Returns font size for indicators according to current
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* height of thumbnail
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* @param {Number} [thumbnailHeight] - current height of thumbnail
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* @returns {Number} - font size for current height
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*/
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getIndicatorFontSize(thumbnailHeight) {
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const height = typeof thumbnailHeight === 'undefined'
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? $('#localVideoContainer').height() : thumbnailHeight;
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const { SMALL, MEDIUM } = ThumbnailSizes;
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let fontSize = IndicatorFontSizes.NORMAL;
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if (height <= SMALL) {
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fontSize = IndicatorFontSizes.SMALL;
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} else if (height > SMALL && height <= MEDIUM) {
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fontSize = IndicatorFontSizes.MEDIUM;
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}
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return fontSize;
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}
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};
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export default UIUtil;
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