489 lines
15 KiB
JavaScript
489 lines
15 KiB
JavaScript
/*
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* SVG Icon Loader 2.0
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*
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* jQuery Plugin for loading SVG icons from a single file
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*
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* Copyright (c) 2009 Alexis Deveria
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* http://a.deveria.com
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*
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* MIT License
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How to use:
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1. Create the SVG master file that includes all icons:
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The master SVG icon-containing file is an SVG file that contains
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<g> elements. Each <g> element should contain the markup of an SVG
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icon. The <g> element has an ID that should
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correspond with the ID of the HTML element used on the page that should contain
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or optionally be replaced by the icon. Additionally, one empty element should be
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added at the end with id "svg_eof".
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2. Optionally create fallback raster images for each SVG icon.
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3. Include the jQuery and the SVG Icon Loader scripts on your page.
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4. Run $.svgIcons() when the document is ready:
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$.svgIcons( file [string], options [object literal]);
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File is the location of a local SVG or SVGz file.
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All options are optional and can include:
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- 'w (number)': The icon widths
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- 'h (number)': The icon heights
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- 'fallback (object literal)': List of raster images with each
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key being the SVG icon ID to replace, and the value the image file name.
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- 'fallback_path (string)': The path to use for all images
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listed under "fallback"
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- 'replace (boolean)': If set to true, HTML elements will be replaced by,
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rather than include the SVG icon.
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- 'placement (object literal)': List with selectors for keys and SVG icon ids
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as values. This provides a custom method of adding icons.
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- 'resize (object literal)': List with selectors for keys and numbers
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as values. This allows an easy way to resize specific icons.
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- 'callback (function)': A function to call when all icons have been loaded.
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Includes an object literal as its argument with as keys all icon IDs and the
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icon as a jQuery object as its value.
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- 'id_match (boolean)': Automatically attempt to match SVG icon ids with
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corresponding HTML id (default: true)
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- 'no_img (boolean)': Prevent attempting to convert the icon into an <img>
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element (may be faster, help for browser consistency)
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- 'svgz (boolean)': Indicate that the file is an SVGZ file, and thus not to
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parse as XML. SVGZ files add compression benefits, but getting data from
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them fails in Firefox 2 and older.
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5. To access an icon at a later point without using the callback, use this:
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$.getSvgIcon(id (string));
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This will return the icon (as jQuery object) with a given ID.
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6. To resize icons at a later point without using the callback, use this:
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$.resizeSvgIcons(resizeOptions) (use the same way as the "resize" parameter)
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Example usage #1:
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$(function() {
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$.svgIcons('my_icon_set.svg'); // The SVG file that contains all icons
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// No options have been set, so all icons will automatically be inserted
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// into HTML elements that match the same IDs.
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});
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Example usage #2:
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$(function() {
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$.svgIcons('my_icon_set.svg', { // The SVG file that contains all icons
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callback (icons) { // Custom callback function that sets click
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// events for each icon
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$.each(icons, function(id, icon) {
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icon.click(function() {
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alert('You clicked on the icon with id ' + id);
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});
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});
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}
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}); //The SVG file that contains all icons
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});
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Example usage #3:
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$(function() {
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$.svgIcons('my_icon_set.svgz', { // The SVGZ file that contains all icons
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w: 32, // All icons will be 32px wide
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h: 32, // All icons will be 32px high
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fallback_path: 'icons/', // All fallback files can be found here
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fallback: {
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'#open_icon': 'open.png', // The "open.png" will be appended to the
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// HTML element with ID "open_icon"
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'#close_icon': 'close.png',
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'#save_icon': 'save.png'
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},
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placement: {'.open_icon','open'}, // The "open" icon will be added
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// to all elements with class "open_icon"
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resize () {
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'#save_icon .svg_icon': 64 // The "save" icon will be resized to 64 x 64px
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},
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callback (icons) { // Sets background color for "close" icon
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icons['close'].css('background','red');
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},
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svgz: true // Indicates that an SVGZ file is being used
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})
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});
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*/
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export default function ($) {
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const svgIcons = {};
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let fixIDs;
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$.svgIcons = function (file, opts) {
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const svgns = 'http://www.w3.org/2000/svg',
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xlinkns = 'http://www.w3.org/1999/xlink',
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iconW = opts.w || 24,
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iconH = opts.h || 24;
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let elems, svgdoc, testImg,
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iconsMade = false, dataLoaded = false, loadAttempts = 0;
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const isOpera = !!window.opera,
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// ua = navigator.userAgent,
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// isSafari = (ua.includes('Safari/') && !ua.includes('Chrome/')),
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dataPre = 'data:image/svg+xml;charset=utf-8;base64,';
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let dataEl;
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if (opts.svgz) {
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dataEl = $('<object data="' + file + '" type=image/svg+xml>').appendTo('body').hide();
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try {
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svgdoc = dataEl[0].contentDocument;
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dataEl.load(getIcons);
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getIcons(0, true); // Opera will not run "load" event if file is already cached
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} catch (err1) {
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useFallback();
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}
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} else {
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const parser = new DOMParser();
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$.ajax({
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url: file,
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dataType: 'string',
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success (data) {
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if (!data) {
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$(useFallback);
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return;
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}
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svgdoc = parser.parseFromString(data, 'text/xml');
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$(function () {
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getIcons('ajax');
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});
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},
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error (err) {
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// TODO: Fix Opera widget icon bug
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if (window.opera) {
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$(function () {
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useFallback();
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});
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} else {
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if (err.responseText) {
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svgdoc = parser.parseFromString(err.responseText, 'text/xml');
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if (!svgdoc.childNodes.length) {
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$(useFallback);
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}
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$(function () {
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getIcons('ajax');
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});
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} else {
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$(useFallback);
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}
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}
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}
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});
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}
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function getIcons (evt, noWait) {
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if (evt !== 'ajax') {
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if (dataLoaded) return;
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// Webkit sometimes says svgdoc is undefined, other times
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// it fails to load all nodes. Thus we must make sure the "eof"
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// element is loaded.
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svgdoc = dataEl[0].contentDocument; // Needed again for Webkit
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const isReady = (svgdoc && svgdoc.getElementById('svg_eof'));
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if (!isReady && !(noWait && isReady)) {
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loadAttempts++;
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if (loadAttempts < 50) {
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setTimeout(getIcons, 20);
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} else {
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useFallback();
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dataLoaded = true;
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}
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return;
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}
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dataLoaded = true;
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}
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elems = $(svgdoc.firstChild).children(); // .getElementsByTagName('foreignContent');
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if (!opts.no_img) {
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const testSrc = dataPre + 'PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNzUiIGhlaWdodD0iMjc1Ij48L3N2Zz4%3D';
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testImg = $(new Image()).attr({
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src: testSrc,
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width: 0,
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height: 0
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}).appendTo('body')
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.load(function () {
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// Safari 4 crashes, Opera and Chrome don't
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makeIcons(true);
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}).error(function () {
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makeIcons();
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});
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} else {
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setTimeout(function () {
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if (!iconsMade) makeIcons();
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}, 500);
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}
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}
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const setIcon = function (target, icon, id, setID) {
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if (isOpera) icon.css('visibility', 'hidden');
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if (opts.replace) {
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if (setID) icon.attr('id', id);
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const cl = target.attr('class');
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if (cl) icon.attr('class', 'svg_icon ' + cl);
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target.replaceWith(icon);
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} else {
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target.append(icon);
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}
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if (isOpera) {
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setTimeout(function () {
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icon.removeAttr('style');
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}, 1);
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}
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};
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let holder;
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const addIcon = function (icon, id) {
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if (opts.id_match === undefined || opts.id_match !== false) {
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setIcon(holder, icon, id, true);
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}
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svgIcons[id] = icon;
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};
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function makeIcons (toImage, fallback) {
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if (iconsMade) return;
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if (opts.no_img) toImage = false;
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let tempHolder;
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if (toImage) {
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tempHolder = $(document.createElement('div'));
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tempHolder.hide().appendTo('body');
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}
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if (fallback) {
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const path = opts.fallback_path || '';
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$.each(fallback, function (id, imgsrc) {
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holder = $('#' + id);
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const icon = $(new Image())
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.attr({
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class: 'svg_icon',
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src: path + imgsrc,
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width: iconW,
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height: iconH,
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alt: 'icon'
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});
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addIcon(icon, id);
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});
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} else {
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const len = elems.length;
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for (let i = 0; i < len; i++) {
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const elem = elems[i];
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const {id} = elem;
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if (id === 'svg_eof') break;
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holder = $('#' + id);
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const svgroot = document.createElementNS(svgns, 'svg');
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// Per https://www.w3.org/TR/xml-names11/#defaulting, the namespace for
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// attributes should have no value.
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svgroot.setAttributeNS(null, 'viewBox', [0, 0, iconW, iconH].join(' '));
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let svg = elem.getElementsByTagNameNS(svgns, 'svg')[0];
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// Make flexible by converting width/height to viewBox
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const w = svg.getAttribute('width');
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const h = svg.getAttribute('height');
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svg.removeAttribute('width');
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svg.removeAttribute('height');
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const vb = svg.getAttribute('viewBox');
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if (!vb) {
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svg.setAttribute('viewBox', [0, 0, w, h].join(' '));
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}
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// Not using jQuery to be a bit faster
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svgroot.setAttribute('xmlns', svgns);
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svgroot.setAttribute('width', iconW);
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svgroot.setAttribute('height', iconH);
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svgroot.setAttribute('xmlns:xlink', xlinkns);
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svgroot.setAttribute('class', 'svg_icon');
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// Without cloning, Firefox will make another GET request.
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// With cloning, causes issue in Opera/Win/Non-EN
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if (!isOpera) svg = svg.cloneNode(true);
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svgroot.appendChild(svg);
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let icon;
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if (toImage) {
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tempHolder.empty().append(svgroot);
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const str = dataPre + encode64(unescape(encodeURIComponent(new XMLSerializer().serializeToString(svgroot))));
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icon = $(new Image())
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.attr({class: 'svg_icon', src: str});
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} else {
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icon = fixIDs($(svgroot), i);
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}
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addIcon(icon, id);
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}
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}
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if (opts.placement) {
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$.each(opts.placement, function (sel, id) {
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if (!svgIcons[id]) return;
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$(sel).each(function (i) {
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let copy = svgIcons[id].clone();
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if (i > 0 && !toImage) copy = fixIDs(copy, i, true);
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setIcon($(this), copy, id);
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});
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});
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}
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if (!fallback) {
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if (toImage) tempHolder.remove();
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if (dataEl) dataEl.remove();
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if (testImg) testImg.remove();
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}
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if (opts.resize) $.resizeSvgIcons(opts.resize);
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iconsMade = true;
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if (opts.callback) opts.callback(svgIcons);
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}
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fixIDs = function (svgEl, svgNum, force) {
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const defs = svgEl.find('defs');
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if (!defs.length) return svgEl;
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let idElems;
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if (isOpera) {
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idElems = defs.find('*').filter(function () {
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return !!this.id;
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});
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} else {
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idElems = defs.find('[id]');
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}
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const allElems = svgEl[0].getElementsByTagName('*'), len = allElems.length;
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idElems.each(function (i) {
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const {id} = this;
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/*
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const noDupes = ($(svgdoc).find('#' + id).length <= 1);
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if (isOpera) noDupes = false; // Opera didn't clone svgEl, so not reliable
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if(!force && noDupes) return;
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*/
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const newId = 'x' + id + svgNum + i;
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this.id = newId;
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const oldVal = 'url(#' + id + ')';
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const newVal = 'url(#' + newId + ')';
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// Selector method, possibly faster but fails in Opera / jQuery 1.4.3
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// svgEl.find('[fill="url(#' + id + ')"]').each(function() {
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// this.setAttribute('fill', 'url(#' + newId + ')');
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// }).end().find('[stroke="url(#' + id + ')"]').each(function() {
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// this.setAttribute('stroke', 'url(#' + newId + ')');
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// }).end().find('use').each(function() {
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// if(this.getAttribute('xlink:href') == '#' + id) {
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// this.setAttributeNS(xlinkns,'href','#' + newId);
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// }
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// }).end().find('[filter="url(#' + id + ')"]').each(function() {
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// this.setAttribute('filter', 'url(#' + newId + ')');
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// });
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for (i = 0; i < len; i++) {
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const elem = allElems[i];
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if (elem.getAttribute('fill') === oldVal) {
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elem.setAttribute('fill', newVal);
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}
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if (elem.getAttribute('stroke') === oldVal) {
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elem.setAttribute('stroke', newVal);
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}
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if (elem.getAttribute('filter') === oldVal) {
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elem.setAttribute('filter', newVal);
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}
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}
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});
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return svgEl;
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};
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function useFallback () {
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if (file.includes('.svgz')) {
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const regFile = file.replace('.svgz', '.svg');
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if (window.console) {
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console.log('.svgz failed, trying with .svg');
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}
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$.svgIcons(regFile, opts);
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} else if (opts.fallback) {
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makeIcons(false, opts.fallback);
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}
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}
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function encode64 (input) {
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// base64 strings are 4/3 larger than the original string
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if (window.btoa) return window.btoa(input);
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const _keyStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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const output = new Array(Math.floor((input.length + 2) / 3) * 4);
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let i = 0, p = 0;
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do {
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const chr1 = input.charCodeAt(i++);
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const chr2 = input.charCodeAt(i++);
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const chr3 = input.charCodeAt(i++);
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const enc1 = chr1 >> 2;
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const enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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let enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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let enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output[p++] = _keyStr.charAt(enc1);
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output[p++] = _keyStr.charAt(enc2);
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output[p++] = _keyStr.charAt(enc3);
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output[p++] = _keyStr.charAt(enc4);
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} while (i < input.length);
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return output.join('');
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}
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};
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$.getSvgIcon = function (id, uniqueClone) {
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let icon = svgIcons[id];
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if (uniqueClone && icon) {
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icon = fixIDs(icon, 0, true).clone(true);
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}
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return icon;
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};
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$.resizeSvgIcons = function (obj) {
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// FF2 and older don't detect .svg_icon, so we change it detect svg elems instead
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const changeSel = !$('.svg_icon:first').length;
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$.each(obj, function (sel, size) {
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const arr = Array.isArray(size);
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const w = arr ? size[0] : size,
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h = arr ? size[1] : size;
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if (changeSel) {
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sel = sel.replace(/\.svg_icon/g, 'svg');
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}
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$(sel).each(function () {
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this.setAttribute('width', w);
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this.setAttribute('height', h);
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if (window.opera && window.widget) {
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this.parentNode.style.width = w + 'px';
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this.parentNode.style.height = h + 'px';
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}
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});
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});
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};
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return $;
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}
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