Add space option (#10)

Fixes #7

index.d.ts

@@ -6,6 +6,28 @@ declare namespace cliTruncate {
 		@default 'end'
 		*/
 		readonly position?: 'start' | 'middle' | 'end';
+
+		/**
+		Add a space between the text and the ellipsis.
+		
+		@default false
+
+		@example
+		```
+		cliTruncate('unicorns', 5, {position: 'end', space: true});
+		//=> 'uni …'
+
+		cliTruncate('unicorns', 5, {position: 'end', space: false});
+		//=> 'unic…'
+
+		cliTruncate('unicorns', 6, {position: 'start', space: true});
+		//=> '… orns'
+
+		cliTruncate('unicorns', 7, {position: 'middle', space: true});
+		//=> 'uni … s'
+		```
+		*/
+		readonly space?: boolean;
 	}
 }
 

index.js

@@ -8,8 +8,9 @@ module.exports = (text, columns, options) => {
 		...options
 	};
 
-	const {position} = options;
-	const ellipsis = '…';
+	const {position, space} = options;
+	let ellipsis = '…';
+	let ellipsisWidth = 1;
 
 	if (typeof text !== 'string') {
 		throw new TypeError(`Expected \`input\` to be a string, got ${typeof text}`);
@@ -34,16 +35,35 @@ module.exports = (text, columns, options) => {
 	}
 
 	if (position === 'start') {
-		return ellipsis + sliceAnsi(text, length - columns + 1, length);
+		if (space === true) {
+			ellipsis += ' ';
+			ellipsisWidth = 2;
+		}
+
+		return ellipsis + sliceAnsi(text, length - columns + ellipsisWidth, length);
 	}
 
 	if (position === 'middle') {
+		if (space === true) {
+			ellipsis = ' ' + ellipsis + ' ';
+			ellipsisWidth = 3;
+		}
+
 		const half = Math.floor(columns / 2);
-		return sliceAnsi(text, 0, half) + ellipsis + sliceAnsi(text, length - (columns - half) + 1, length);
+		return (
+			sliceAnsi(text, 0, half) +
+			ellipsis +
+			sliceAnsi(text, length - (columns - half) + ellipsisWidth, length)
+		);
 	}
 
 	if (position === 'end') {
-		return sliceAnsi(text, 0, columns - 1) + ellipsis;
+		if (space === true) {
+			ellipsis = ' ' + ellipsis;
+			ellipsisWidth = 2;
+		}
+
+		return sliceAnsi(text, 0, columns - ellipsisWidth) + ellipsis;
 	}
 
 	throw new Error(`Expected \`options.position\` to be either \`start\`, \`middle\` or \`end\`, got ${position}`);

readme.md

@@ -73,6 +73,27 @@ Values: `start` `middle` `end`
 
 Position to truncate the string.
 
+##### space
+
+Type: `boolean`<br>
+Default: `false`
+
+Add a space between the text and the ellipsis.
+
+```js
+cliTruncate('unicorns', 5, {space: false});
+//=> 'unic…'
+
+cliTruncate('unicorns', 5, {space: true});
+//=> 'uni …'
+
+cliTruncate('unicorns', 6, {position: 'start', space: true});
+//=> '… orns'
+
+cliTruncate('unicorns', 7, {position: 'middle', space: true});
+//=> 'uni … s'
+```
+
 
 ## Related
 

test.js

@@ -20,3 +20,17 @@ test('main', t => {
 	t.is(cliTruncate('unicorn', 5, {position: 'middle'}), 'un…rn');
 	t.is(cliTruncate('unicorns', 6, {position: 'middle'}), 'uni…ns');
 });
+
+test('space option', t => {
+	t.is(cliTruncate('unicorns', 5, {position: 'end', space: true}), 'uni …');
+	t.is(cliTruncate('unicorns', 6, {position: 'start', space: true}), '… orns');
+	t.is(cliTruncate('unicorns', 7, {position: 'middle', space: true}), 'uni … s');
+	t.is(cliTruncate('unicorns', 5, {position: 'end', space: false}), 'unic…');
+	t.is(cliTruncate('\u001B[31municorn\u001B[39m', 6, {space: true}), '\u001B[31munic\u001B[39m …');
+	t.is(cliTruncate('Plant a tree every day.', 14, {space: true}), 'Plant a tree …');
+	t.is(cliTruncate('안녕하세요', 4, {space: true}), '안 …', 'wide char');
+	t.is(cliTruncate('\u001B[31municorn\u001B[39m', 6, {position: 'start', space: true}), '… \u001B[31mcorn\u001B[39m');
+	t.is(cliTruncate('\u001B[31municornsareawesome\u001B[39m', 10, {position: 'middle', space: true}), '\u001B[31munico\u001B[39m … \u001B[31mme\u001B[39m');
+	t.is(cliTruncate('Plant a tree every day.', 14, {position: 'middle', space: true}), 'Plant a … day.');
+	t.is(cliTruncate('안녕하세요', 4, {position: 'start', space: true}), '… 요', 'wide char');
+});