refactor: add support for detecting terminal resize events

lib/node_modules/@stdlib/repl/lib/main.js

@@ -24,6 +24,7 @@
 
 var EventEmitter = require( 'events' ).EventEmitter;
 var readline = require( 'readline' );
+var proc = require( 'process' );
 var resolve = require( 'path' ).resolve;
 var logger = require( 'debug' );
 var inherit = require( '@stdlib/utils/inherit' );
@@ -279,6 +280,7 @@ function REPL( options ) {
 	this._rli.on( 'close', onClose );
 	this._rli.on( 'line', onLine );
 	this._rli.on( 'SIGINT', onSIGINT );
+	proc.on( 'SIGWINCH', onSIGWINCH ); // terminal resize
 
 	// Add listener for "command" events:
 	this.on( 'command', onCommand );
@@ -373,6 +375,17 @@ function REPL( options ) {
 		self.emit( 'exit' );
 	}
 
+	/**
+	* Callback invoked upon receiving a "SIGWINCH" event (i.e., a terminal/console resize event).
+	*
+	* @private
+	* @returns {void}
+	*/
+	function onSIGWINCH() {
+		debug( 'Received a SIGWINCH event. Terminal was resized.' );
+		self._ostream.onResize();
+	}
+
 	/**
 	* Callback invoked upon receiving a "SIGINT" event (e.g., Ctrl-C).
 	*

lib/node_modules/@stdlib/repl/lib/output_stream.js

@@ -109,7 +109,6 @@ function OutputStream( repl, autoPage ) {
 	this._buffer = '';
 
 	// Initialize a buffer for storing line breaks:
-	this._lines = [];
 	this._indices = [];
 
 	// Initialize a variable for tracking the current scroll position:
@@ -361,7 +360,7 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_scrollUp', function scrollUp
 		return;
 	}
 	this._idx -= 1;
-	this._scroll();
+	this._redraw();
 });
 
 /**
@@ -378,18 +377,18 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_scrollDown', function scroll
 		return;
 	}
 	this._idx += 1;
-	return this._scroll();
+	return this._redraw();
 });
 
 /**
-* Scrolls the current page based on the updated index.
+* Redraws the page content.
 *
 * @private
-* @name _scroll
+* @name _redraw
 * @memberof OutputStream.prototype
 * @returns {void}
 */
-setNonEnumerableReadOnly( OutputStream.prototype, '_scroll', function scroll() {
+setNonEnumerableReadOnly( OutputStream.prototype, '_redraw', function redraw() {
 	var height;
 	var width;
 	var str;
@@ -405,7 +404,7 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_scroll', function scroll() {
 
 	// If we're not showing the first line of content, display a seperator to convey that one can scroll up to see additional content...
 	str = '';
-	if ( idx > 0 ) { // FIXME: what happens when a user resizes the terminal window?
+	if ( idx > 0 ) {
 		str += '\n' + repeat( '_', width ) + '\n';
 	} else {
 		str += '\n\n';
@@ -414,7 +413,7 @@ setNonEnumerableReadOnly( OutputStream.prototype, '_scroll', function scroll() {
 	str += this._buffer.substring( this._indices[ idx ], this._indices[ height+idx ] - 1 ) + '\n';
 
 	// If we're not showing the last line of content, display a seperator to convey that one can scroll down to see additional content...
-	if ( height + idx < this._indices.length - 1 ) { // FIXME: what happens when a user resizes the terminal window?
+	if ( height + idx < this._indices.length - 1 ) {
 		str += repeat( '_', width ) + '\n';
 	} else {
 		str += '\n';
@@ -497,6 +496,20 @@ setNonEnumerableReadOnly( OutputStream.prototype, 'beforeKeypress', function bef
 	}
 });
 
+/**
+* Callback which should be invoked upon a "resize" event.
+*
+* @name onResize
+* @memberof OutputStream.prototype
+* @returns {void}
+*/
+setNonEnumerableReadOnly( OutputStream.prototype, 'onResize', function onResize() {
+	if ( !this._isPaging ) {
+		return;
+	}
+	this._redraw();
+});
+
 
 // EXPORTS //
 

lib/node_modules/@stdlib/repl/package.json

@@ -17,7 +17,10 @@
     "stdlib-repl": "./bin/cli"
   },
   "main": "./lib",
-  "browser": "./lib/browser/index.js",
+  "browser": {
+    "./lib": "./lib/browser/index.js",
+    "process": "process/"
+  },
   "directories": {
     "benchmark": "./benchmark",
     "data": "./data",