286 lines
7.8 KiB
JavaScript
286 lines
7.8 KiB
JavaScript
/* globals jQuery */
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/**
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* Browser detection.
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* @module browser
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* @license MIT
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*
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* @copyright 2010 Jeff Schiller, 2010 Alexis Deveria
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*/
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// Dependencies:
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// 1) jQuery (for $.alert())
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import './svgpathseg.js';
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import {NS} from './namespaces.js';
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const $ = jQuery;
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const supportsSVG_ = (function () {
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return Boolean(document.createElementNS && document.createElementNS(NS.SVG, 'svg').createSVGRect);
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}());
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/**
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* @function module:browser.supportsSvg
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* @returns {boolean}
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*/
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export const supportsSvg = () => supportsSVG_;
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const {userAgent} = navigator;
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const svg = document.createElementNS(NS.SVG, 'svg');
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// Note: Browser sniffing should only be used if no other detection method is possible
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const isOpera_ = Boolean(window.opera);
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const isWebkit_ = userAgent.includes('AppleWebKit');
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const isGecko_ = userAgent.includes('Gecko/');
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const isIE_ = userAgent.includes('MSIE');
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const isChrome_ = userAgent.includes('Chrome/');
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const isWindows_ = userAgent.includes('Windows');
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const isMac_ = userAgent.includes('Macintosh');
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const isTouch_ = 'ontouchstart' in window;
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const supportsSelectors_ = (function () {
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return Boolean(svg.querySelector);
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}());
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const supportsXpath_ = (function () {
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return Boolean(document.evaluate);
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}());
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// segList functions (for FF1.5 and 2.0)
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const supportsPathReplaceItem_ = (function () {
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const path = document.createElementNS(NS.SVG, 'path');
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path.setAttribute('d', 'M0,0 10,10');
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const seglist = path.pathSegList;
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const seg = path.createSVGPathSegLinetoAbs(5, 5);
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try {
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seglist.replaceItem(seg, 1);
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return true;
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} catch (err) {}
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return false;
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}());
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const supportsPathInsertItemBefore_ = (function () {
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const path = document.createElementNS(NS.SVG, 'path');
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path.setAttribute('d', 'M0,0 10,10');
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const seglist = path.pathSegList;
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const seg = path.createSVGPathSegLinetoAbs(5, 5);
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try {
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seglist.insertItemBefore(seg, 1);
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return true;
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} catch (err) {}
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return false;
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}());
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// text character positioning (for IE9 and now Chrome)
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const supportsGoodTextCharPos_ = (function () {
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const svgroot = document.createElementNS(NS.SVG, 'svg');
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const svgcontent = document.createElementNS(NS.SVG, 'svg');
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document.documentElement.append(svgroot);
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svgcontent.setAttribute('x', 5);
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svgroot.append(svgcontent);
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const text = document.createElementNS(NS.SVG, 'text');
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text.textContent = 'a';
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svgcontent.append(text);
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try { // Chrome now fails here
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const pos = text.getStartPositionOfChar(0).x;
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return (pos === 0);
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} catch (err) {
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return false;
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} finally {
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svgroot.remove();
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}
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}());
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const supportsPathBBox_ = (function () {
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const svgcontent = document.createElementNS(NS.SVG, 'svg');
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document.documentElement.append(svgcontent);
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const path = document.createElementNS(NS.SVG, 'path');
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path.setAttribute('d', 'M0,0 C0,0 10,10 10,0');
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svgcontent.append(path);
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const bbox = path.getBBox();
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svgcontent.remove();
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return (bbox.height > 4 && bbox.height < 5);
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}());
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// Support for correct bbox sizing on groups with horizontal/vertical lines
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const supportsHVLineContainerBBox_ = (function () {
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const svgcontent = document.createElementNS(NS.SVG, 'svg');
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document.documentElement.append(svgcontent);
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const path = document.createElementNS(NS.SVG, 'path');
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path.setAttribute('d', 'M0,0 10,0');
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const path2 = document.createElementNS(NS.SVG, 'path');
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path2.setAttribute('d', 'M5,0 15,0');
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const g = document.createElementNS(NS.SVG, 'g');
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g.append(path, path2);
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svgcontent.append(g);
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const bbox = g.getBBox();
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svgcontent.remove();
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// Webkit gives 0, FF gives 10, Opera (correctly) gives 15
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return (bbox.width === 15);
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}());
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const supportsEditableText_ = (function () {
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// TODO: Find better way to check support for this
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return isOpera_;
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}());
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const supportsGoodDecimals_ = (function () {
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// Correct decimals on clone attributes (Opera < 10.5/win/non-en)
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const rect = document.createElementNS(NS.SVG, 'rect');
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rect.setAttribute('x', 0.1);
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const crect = rect.cloneNode(false);
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const retValue = (!crect.getAttribute('x').includes(','));
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if (!retValue) {
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// Todo: i18nize or remove
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$.alert(
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'NOTE: This version of Opera is known to contain bugs in SVG-edit.\n' +
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'Please upgrade to the <a href="http://opera.com">latest version</a> in which the problems have been fixed.'
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);
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}
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return retValue;
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}());
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const supportsNonScalingStroke_ = (function () {
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const rect = document.createElementNS(NS.SVG, 'rect');
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rect.setAttribute('style', 'vector-effect:non-scaling-stroke');
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return rect.style.vectorEffect === 'non-scaling-stroke';
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}());
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let supportsNativeSVGTransformLists_ = (function () {
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const rect = document.createElementNS(NS.SVG, 'rect');
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const rxform = rect.transform.baseVal;
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const t1 = svg.createSVGTransform();
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rxform.appendItem(t1);
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const r1 = rxform.getItem(0);
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const isSVGTransform = (o) => {
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// https://developer.mozilla.org/en-US/docs/Web/API/SVGTransform
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return o && typeof o === 'object' && typeof o.setMatrix === 'function' && 'angle' in o;
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};
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return isSVGTransform(r1) && isSVGTransform(t1) &&
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r1.type === t1.type && r1.angle === t1.angle &&
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r1.matrix.a === t1.matrix.a &&
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r1.matrix.b === t1.matrix.b &&
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r1.matrix.c === t1.matrix.c &&
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r1.matrix.d === t1.matrix.d &&
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r1.matrix.e === t1.matrix.e &&
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r1.matrix.f === t1.matrix.f;
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}());
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// Public API
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/**
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* @function module:browser.isOpera
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* @returns {boolean}
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*/
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export const isOpera = () => isOpera_;
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/**
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* @function module:browser.isWebkit
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* @returns {boolean}
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*/
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export const isWebkit = () => isWebkit_;
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/**
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* @function module:browser.isGecko
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* @returns {boolean}
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*/
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export const isGecko = () => isGecko_;
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/**
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* @function module:browser.isIE
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* @returns {boolean}
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*/
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export const isIE = () => isIE_;
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/**
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* @function module:browser.isChrome
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* @returns {boolean}
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*/
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export const isChrome = () => isChrome_;
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/**
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* @function module:browser.isWindows
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* @returns {boolean}
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*/
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export const isWindows = () => isWindows_;
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/**
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* @function module:browser.isMac
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* @returns {boolean}
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*/
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export const isMac = () => isMac_;
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/**
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* @function module:browser.isTouch
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* @returns {boolean}
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*/
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export const isTouch = () => isTouch_;
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/**
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* @function module:browser.supportsSelectors
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* @returns {boolean}
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*/
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export const supportsSelectors = () => supportsSelectors_;
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/**
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* @function module:browser.supportsXpath
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* @returns {boolean}
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*/
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export const supportsXpath = () => supportsXpath_;
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/**
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* @function module:browser.supportsPathReplaceItem
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* @returns {boolean}
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*/
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export const supportsPathReplaceItem = () => supportsPathReplaceItem_;
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/**
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* @function module:browser.supportsPathInsertItemBefore
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* @returns {boolean}
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*/
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export const supportsPathInsertItemBefore = () => supportsPathInsertItemBefore_;
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/**
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* @function module:browser.supportsPathBBox
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* @returns {boolean}
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*/
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export const supportsPathBBox = () => supportsPathBBox_;
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/**
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* @function module:browser.supportsHVLineContainerBBox
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* @returns {boolean}
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*/
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export const supportsHVLineContainerBBox = () => supportsHVLineContainerBBox_;
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/**
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* @function module:browser.supportsGoodTextCharPos
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* @returns {boolean}
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*/
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export const supportsGoodTextCharPos = () => supportsGoodTextCharPos_;
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/**
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* @function module:browser.supportsEditableText
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* @returns {boolean}
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*/
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export const supportsEditableText = () => supportsEditableText_;
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/**
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* @function module:browser.supportsGoodDecimals
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* @returns {boolean}
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*/
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export const supportsGoodDecimals = () => supportsGoodDecimals_;
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/**
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* @function module:browser.supportsNonScalingStroke
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* @returns {boolean}
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*/
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export const supportsNonScalingStroke = () => supportsNonScalingStroke_;
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/**
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* @function module:browser.supportsNativeTransformLists
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* @returns {boolean}
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*/
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export const supportsNativeTransformLists = () => supportsNativeSVGTransformLists_;
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/**
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* Set `supportsNativeSVGTransformLists_` to `false` (for unit testing).
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* @function module:browser.disableSupportsNativeTransformLists
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* @returns {void}
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*/
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export const disableSupportsNativeTransformLists = () => {
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supportsNativeSVGTransformLists_ = false;
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};
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