Merge pull request #278 from ckeditor/t/ckeditor5/1463

Feature: Added `isSafari` property and `isSafari()` helper to the `env` module. See: ckeditor/ckeditor5#1463.

src/env.js

@@ -39,7 +39,15 @@ const env = {
 	 * @static
 	 * @member {Boolean} module:utils/env~env#isEdge
 	 */
-	isGecko: isGecko( userAgent )
+	isGecko: isGecko( userAgent ),
+
+	/**
+	 * Indicates that the application is running in Safari.
+	 *
+	 * @static
+	 * @member {Boolean} module:utils/env~env#isSafari
+	 */
+	isSafari: isSafari( userAgent )
 };
 
 export default env;
@@ -73,3 +81,13 @@ export function isEdge( userAgent ) {
 export function isGecko( userAgent ) {
 	return !!userAgent.match( /gecko\/\d+/ );
 }
+
+/**
+ * Checks if User Agent represented by the string is Safari.
+ *
+ * @param {String} userAgent **Lowercase** `navigator.userAgent` string.
+ * @returns {Boolean} Whether User Agent is Safari or not.
+ */
+export function isSafari( userAgent ) {
+	return userAgent.indexOf( ' applewebkit/' ) > -1 && userAgent.indexOf( 'chrome' ) === -1;
+}

tests/env.js

@@ -3,16 +3,13 @@
  * For licensing, see LICENSE.md.
  */
 
-import env, { isEdge, isMac, isGecko } from '../src/env';
+import env, { isEdge, isMac, isGecko, isSafari } from '../src/env';
 
 function toLowerCase( str ) {
 	return str.toLowerCase();
 }
 
 describe( 'Env', () => {
-	beforeEach( () => {
-	} );
-
 	it( 'is an object', () => {
 		expect( env ).to.be.an( 'object' );
 	} );
@@ -35,6 +32,12 @@ describe( 'Env', () => {
 		} );
 	} );
 
+	describe( 'isSafari', () => {
+		it( 'is a boolean', () => {
+			expect( env.isSafari ).to.be.a( 'boolean' );
+		} );
+	} );
+
 	describe( 'isMac()', () => {
 		it( 'returns true for macintosh UA strings', () => {
 			expect( isMac( 'macintosh' ) ).to.be.true;
@@ -103,4 +106,32 @@ describe( 'Env', () => {
 			) ) ).to.be.false;
 		} );
 	} );
+
+	describe( 'isSafari()', () => {
+		/* eslint-disable max-len */
+		it( 'returns true for Safari UA strings', () => {
+			expect( isSafari( toLowerCase(
+				'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.3 Safari/605.1.15'
+			) ) ).to.be.true;
+
+			expect( isSafari( toLowerCase(
+				'Mozilla/5.0 (iPhone; CPU iPhone OS 12_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Mobile/15E148 Safari/604.1'
+			) ) ).to.be.true;
+		} );
+
+		it( 'returns false for non-Safari UA strings', () => {
+			expect( isSafari( toLowerCase(
+				'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36'
+			) ) ).to.be.false;
+
+			expect( isSafari( toLowerCase(
+				'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0'
+			) ) ).to.be.false;
+
+			expect( isSafari( toLowerCase(
+				'Mozilla/5.0 (Linux; Android 7.1; Mi A1 Build/N2G47H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.83 Mobile Safari/537.36'
+			) ) ).to.be.false;
+		} );
+		/* eslint-enable max-len */
+	} );
 } );