events: deprecate static listenerCount function

As per the discussion in #734, this patch deprecates the usage of
`EventEmitter.listenerCount` static function in the docs, and introduces
the `listenerCount` function in the prototype of `EventEmitter` itself.

PR-URL: https://github.com/nodejs/node/pull/2349
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/readline.js b/lib/readline.js
index 02fa9d08f6..6164bcc85f 100644
--- a/lib/readline.js
+++ b/lib/readline.js
@@ -683,7 +683,7 @@ Interface.prototype._ttyWrite = function(s, key) {
 
     switch (key.name) {
       case 'c':
-        if (EventEmitter.listenerCount(this, 'SIGINT') > 0) {
+        if (this.listenerCount('SIGINT') > 0) {
           this.emit('SIGINT');
         } else {
           // This readline instance is finished
@@ -746,7 +746,7 @@ Interface.prototype._ttyWrite = function(s, key) {
 
       case 'z':
         if (process.platform == 'win32') break;
-        if (EventEmitter.listenerCount(this, 'SIGTSTP') > 0) {
+        if (this.listenerCount('SIGTSTP') > 0) {
           this.emit('SIGTSTP');
         } else {
           process.once('SIGCONT', (function(self) {
@@ -907,7 +907,7 @@ function emitKeypressEvents(stream) {
   stream[ESCAPE_DECODER].next();
 
   function onData(b) {
-    if (EventEmitter.listenerCount(stream, 'keypress') > 0) {
+    if (stream.listenerCount('keypress') > 0) {
       var r = stream[KEYPRESS_DECODER].write(b);
       if (r) {
         for (var i = 0; i < r.length; i++) {
@@ -936,7 +936,7 @@ function emitKeypressEvents(stream) {
     }
   }
 
-  if (EventEmitter.listenerCount(stream, 'keypress') > 0) {
+  if (stream.listenerCount('keypress') > 0) {
     stream.on('data', onData);
   } else {
     stream.on('newListener', onNewListener);