81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
/**
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* Created by hristo on 12/22/14.
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*/
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module.exports = {
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/**
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* Returns the available video width.
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*/
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getAvailableVideoWidth: function () {
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var PanelToggler = require("../side_pannels/SidePanelToggler");
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var rightPanelWidth
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= PanelToggler.isVisible() ? PanelToggler.getPanelSize()[0] : 0;
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return window.innerWidth - rightPanelWidth;
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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: function(id, classname) {
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$(id).toggleClass(classname); // add the class to the clicked element
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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: function (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: function (el) {
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return (el.clientHeight + 1);
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},
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/**
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* Plays the sound given by id.
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*
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* @param id the identifier of the audio element.
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*/
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playSoundNotification: function (id) {
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document.getElementById(id).play();
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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: function (unsafeText) {
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return $('<div/>').text(unsafeText).html();
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},
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imageToGrayScale: function (canvas) {
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var context = canvas.getContext('2d');
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var imgData = context.getImageData(0, 0, canvas.width, canvas.height);
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var pixels = imgData.data;
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for (var i = 0, n = pixels.length; i < n; i += 4) {
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var grayscale
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= pixels[i] * .3 + pixels[i+1] * .59 + pixels[i+2] * .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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setTooltip: function (element, key, position) {
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element.setAttribute("data-i18n", "[data-content]" + key);
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element.setAttribute("data-toggle", "popover");
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element.setAttribute("data-placement", position);
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element.setAttribute("data-html", true);
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element.setAttribute("data-container", "body");
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}
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}; |