From a79e8106ea737292d4c7e21ee7dd5bf1960dee15 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 10 Aug 2015 22:57:01 -0700
Subject: [PATCH] cleanup and fixes.

---
 lib/colors.js                 |  18 ++--
 lib/gpmclient.js              |   8 +-
 lib/keys.js                   |   3 +-
 lib/program.js                | 123 ++++++++++++-----------
 lib/tput.js                   |  45 ++++-----
 lib/unicode.js                | 180 +++++++++++++++++-----------------
 lib/widgets/ansiimage.js      |   7 +-
 lib/widgets/bigtext.js        |   2 -
 lib/widgets/box.js            |   2 -
 lib/widgets/button.js         |   2 -
 lib/widgets/checkbox.js       |   4 +-
 lib/widgets/element.js        |  25 ++---
 lib/widgets/form.js           |   5 +-
 lib/widgets/image.js          |   4 -
 lib/widgets/input.js          |   2 -
 lib/widgets/layout.js         |  10 +-
 lib/widgets/line.js           |   4 -
 lib/widgets/list.js           |  24 ++---
 lib/widgets/listbar.js        |  10 +-
 lib/widgets/listtable.js      |  26 +++--
 lib/widgets/loading.js        |   4 -
 lib/widgets/log.js            |   2 -
 lib/widgets/message.js        |   4 -
 lib/widgets/node.js           |   2 -
 lib/widgets/overlayimage.js   |  14 +--
 lib/widgets/progressbar.js    |   2 -
 lib/widgets/prompt.js         |   4 -
 lib/widgets/question.js       |   4 -
 lib/widgets/radiobutton.js    |   2 -
 lib/widgets/radioset.js       |   2 -
 lib/widgets/screen.js         |  26 +++--
 lib/widgets/scrollablebox.js  |   8 +-
 lib/widgets/scrollabletext.js |   2 -
 lib/widgets/table.js          |  39 ++++----
 lib/widgets/terminal.js       |  12 +--
 lib/widgets/text.js           |   2 -
 lib/widgets/textarea.js       |   2 -
 lib/widgets/textbox.js        |   4 -
 lib/widgets/video.js          |   4 -
 39 files changed, 282 insertions(+), 361 deletions(-)

diff --git a/lib/colors.js b/lib/colors.js
index f8a7439..6d0cb89 100644
--- a/lib/colors.js
+++ b/lib/colors.js
@@ -122,6 +122,8 @@ exports.mixColors = function(c1, c2, alpha) {
 };
 
 exports.blend = function blend(attr, attr2, alpha) {
+  var name, i, c, nc;
+
   var bg = attr & 0x1ff;
   if (attr2 != null) {
     var bg2 = attr2 & 0x1ff;
@@ -136,12 +138,12 @@ exports.blend = function blend(attr, attr2, alpha) {
     } else if (bg >= 8 && bg <= 15) {
       bg -= 8;
     } else {
-      var name = exports.ncolors[bg];
+      name = exports.ncolors[bg];
       if (name) {
-        for (var i = 0; i < exports.ncolors.length; i++) {
+        for (i = 0; i < exports.ncolors.length; i++) {
           if (name === exports.ncolors[i] && i !== bg) {
-            var c = exports.vcolors[bg];
-            var nc = exports.vcolors[i];
+            c = exports.vcolors[bg];
+            nc = exports.vcolors[i];
             if (nc[0] + nc[1] + nc[2] < c[0] + c[1] + c[2]) {
               blend._cache[bg] = i;
               bg = i;
@@ -176,12 +178,12 @@ exports.blend = function blend(attr, attr2, alpha) {
     } else if (fg >= 8 && fg <= 15) {
       fg -= 8;
     } else {
-      var name = exports.ncolors[fg];
+      name = exports.ncolors[fg];
       if (name) {
-        for (var i = 0; i < exports.ncolors.length; i++) {
+        for (i = 0; i < exports.ncolors.length; i++) {
           if (name === exports.ncolors[i] && i !== fg) {
-            var c = exports.vcolors[fg];
-            var nc = exports.vcolors[i];
+            c = exports.vcolors[fg];
+            nc = exports.vcolors[i];
             if (nc[0] + nc[1] + nc[2] < c[0] + c[1] + c[2]) {
               blend._cache[fg] = i;
               fg = i;
diff --git a/lib/gpmclient.js b/lib/gpmclient.js
index 2443e72..348bb45 100644
--- a/lib/gpmclient.js
+++ b/lib/gpmclient.js
@@ -7,7 +7,6 @@
 var net = require('net');
 var fs = require('fs');
 var EventEmitter = require('events').EventEmitter;
-var util = require('util')
 
 var GPM_USE_MAGIC = false;
 
@@ -33,8 +32,9 @@ var GPM_SOCKET = '/dev/gpmctl';
 // } Gpm_Connect;
 
 function send_config(socket, Gpm_Connect,  callback) {
+  var buffer;
   if (GPM_USE_MAGIC) {
-    var buffer = new Buffer(20);
+    buffer = new Buffer(20);
     buffer.writeUInt32LE(GPM_MAGIC, 0);
     buffer.writeUInt16LE(Gpm_Connect.eventMask, 4);
     buffer.writeUInt16LE(Gpm_Connect.defaultMask, 6);
@@ -43,7 +43,7 @@ function send_config(socket, Gpm_Connect,  callback) {
     buffer.writeInt16LE(process.pid, 12);
     buffer.writeInt16LE(Gpm_Connect.vc, 16);
   } else {
-    var buffer = new Buffer(16);
+    buffer = new Buffer(16);
     buffer.writeUInt16LE(Gpm_Connect.eventMask, 0);
     buffer.writeUInt16LE(Gpm_Connect.defaultMask, 2);
     buffer.writeUInt16LE(Gpm_Connect.minMod, 4);
@@ -183,7 +183,7 @@ function GpmClient(options) {
         }
       });
 
-      gpm.on('error', function(err) {
+      gpm.on('error', function() {
         self.stop();
       });
     });
diff --git a/lib/keys.js b/lib/keys.js
index 80ed9c6..8c79f3c 100644
--- a/lib/keys.js
+++ b/lib/keys.js
@@ -26,7 +26,6 @@
 // IN THE SOFTWARE.
 
 var EventEmitter = require('events').EventEmitter;
-var StringDecoder = require('string_decoder').StringDecoder;
 
 // NOTE: node <=v0.8.x has no EventEmitter.listenerCount
 function listenerCount(stream, event) {
@@ -56,7 +55,7 @@ function emitKeypressEvents(stream) {
   }
 
   function onNewListener(event) {
-    if (event == 'keypress') {
+    if (event === 'keypress') {
       stream.on('data', onData);
       stream.removeListener('newListener', onNewListener);
     }
diff --git a/lib/program.js b/lib/program.js
index 6ca0b18..253913d 100644
--- a/lib/program.js
+++ b/lib/program.js
@@ -572,7 +572,15 @@ Program.prototype.bindMouse = function() {
 Program.prototype._bindMouse = function(s, buf) {
   var self = this
     , key
-    , parts;
+    , parts
+    , b
+    , x
+    , y
+    , mod
+    , params
+    , down
+    , page
+    , button;
 
   key = {
     name: undefined,
@@ -616,9 +624,9 @@ Program.prototype._bindMouse = function(s, buf) {
       || (by > 0x00 && by < 0x20)
       || (buf[4] > 223 && buf[4] < 248 && buf.length === 6)
       || (buf[5] > 223 && buf[5] < 248 && buf.length === 6))) {
-    var b = buf[3]
-      , x = buf[4]
-      , y = buf[5];
+    b = buf[3];
+    x = buf[4];
+    y = buf[5];
 
     // unsigned char overflow.
     if (x < 0x20) x += 0xff;
@@ -634,10 +642,9 @@ Program.prototype._bindMouse = function(s, buf) {
 
   // XTerm / X10
   if (parts = /^\x1b\[M([\x00\u0020-\uffff]{3})/.exec(s)) {
-    var b = parts[1].charCodeAt(0)
-      , x = parts[1].charCodeAt(1)
-      , y = parts[1].charCodeAt(2)
-      , mod;
+    b = parts[1].charCodeAt(0);
+    x = parts[1].charCodeAt(1);
+    y = parts[1].charCodeAt(2);
 
     key.name = 'mouse';
     key.type = 'X10';
@@ -670,7 +677,7 @@ Program.prototype._bindMouse = function(s, buf) {
       delete this._lastButton;
     } else {
       key.action = 'mousedown';
-      var button = b & 3;
+      button = b & 3;
       key.button =
         button === 0 ? 'left'
         : button === 1 ? 'middle'
@@ -702,10 +709,10 @@ Program.prototype._bindMouse = function(s, buf) {
 
   // URxvt
   if (parts = /^\x1b\[(\d+;\d+;\d+)M/.exec(s)) {
-    var params = parts[1].split(';')
-      , b = +params[0]
-      , x = +params[1]
-      , y = +params[2];
+    params = parts[1].split(';');
+    b = +params[0];
+    x = +params[1];
+    y = +params[2];
 
     key.name = 'mouse';
     key.type = 'urxvt';
@@ -742,7 +749,7 @@ Program.prototype._bindMouse = function(s, buf) {
       delete this._lastButton;
     } else {
       key.action = 'mousedown';
-      var button = b & 3;
+      button = b & 3;
       key.button =
         button === 0 ? 'left'
         : button === 1 ? 'middle'
@@ -775,11 +782,11 @@ Program.prototype._bindMouse = function(s, buf) {
 
   // SGR
   if (parts = /^\x1b\[<(\d+;\d+;\d+)([mM])/.exec(s)) {
-    var down = parts[2] === 'M'
-      , params = parts[1].split(';')
-      , b = +params[0]
-      , x = +params[1]
-      , y = +params[2];
+    down = parts[2] === 'M';
+    params = parts[1].split(';');
+    b = +params[0];
+    x = +params[1];
+    y = +params[2];
 
     key.name = 'mouse';
     key.type = 'sgr';
@@ -803,7 +810,7 @@ Program.prototype._bindMouse = function(s, buf) {
       key.action = down
         ? 'mousedown'
         : 'mouseup';
-      var button = b & 3;
+      button = b & 3;
       key.button =
         button === 0 ? 'left'
         : button === 1 ? 'middle'
@@ -835,11 +842,11 @@ Program.prototype._bindMouse = function(s, buf) {
   // The xterm mouse documentation says there is a
   // `<` prefix, the DECRQLP says there is no prefix.
   if (parts = /^\x1b\[<(\d+;\d+;\d+;\d+)&w/.exec(s)) {
-    var params = parts[1].split(';')
-      , b = +params[0]
-      , x = +params[1]
-      , y = +params[2]
-      , page = +params[3];
+    params = parts[1].split(';');
+    b = +params[0];
+    x = +params[1];
+    y = +params[2];
+    page = +params[3];
 
     key.name = 'mouse';
     key.type = 'dec';
@@ -848,6 +855,7 @@ Program.prototype._bindMouse = function(s, buf) {
     key.buf = buf;
     key.x = x;
     key.y = y;
+    key.page = page;
 
     if (this.zero) key.x--, key.y--;
 
@@ -868,9 +876,9 @@ Program.prototype._bindMouse = function(s, buf) {
 
   // vt300
   if (parts = /^\x1b\[24([0135])~\[(\d+),(\d+)\]\r/.exec(s)) {
-    var b = +parts[1]
-      , x = +parts[2]
-      , y = +parts[3];
+    b = +parts[1];
+    x = +parts[2];
+    y = +parts[3];
 
     key.name = 'mouse';
     key.type = 'vt300';
@@ -909,7 +917,7 @@ Program.prototype._bindMouse = function(s, buf) {
 // gpm support for linux vc
 Program.prototype.enableGpm = function() {
   var self = this;
-  var gpmclient = require('./gpmclient')
+  var gpmclient = require('./gpmclient');
 
   if (this.gpm) return;
 
@@ -1032,8 +1040,7 @@ Program.prototype.bindResponse = function() {
 };
 
 Program.prototype._bindResponse = function(s) {
-  var self = this
-    , out = {}
+  var out = {}
     , parts;
 
   if (Buffer.isBuffer(s)) {
@@ -1319,7 +1326,7 @@ Program.prototype._bindResponse = function(s) {
       out.type = 'window-state';
       out.state = parts[1] === '1'
         ? 'non-iconified'
-        : 'iconified'
+        : 'iconified';
 
       // LEGACY
       out.windowState = out.state;
@@ -1649,7 +1656,7 @@ Program.prototype._buffer = function(text) {
   return true;
 };
 
-Program.prototype.flush = function(text) {
+Program.prototype.flush = function() {
   if (!this._buf) return;
   this._owrite(this._buf);
   this._buf = '';
@@ -1784,7 +1791,7 @@ Program.prototype.simpleInsert = function(ch, i, attr) {
 };
 
 Program.prototype.repeat = function(ch, i) {
-  if (!(i >= 0)) i = 0;
+  if (!i || i < 0) i = 0;
   return Array(i + 1).join(ch);
 };
 
@@ -2044,7 +2051,7 @@ Program.prototype.restoreCursor = function(key, hide) {
 
 // Save Cursor Locally
 Program.prototype.lsaveCursor = function(key) {
-  var key = key || 'local';
+  key = key || 'local';
   this._saved = this._saved || {};
   this._saved[key] = this._saved[key] || {};
   this._saved[key].x = this.x;
@@ -2054,7 +2061,8 @@ Program.prototype.lsaveCursor = function(key) {
 
 // Restore Cursor Locally
 Program.prototype.lrestoreCursor = function(key, hide) {
-  var key = key || 'local', pos;
+  var pos;
+  key = key || 'local';
   if (!this._saved || !this._saved[key]) return;
   pos = this._saved[key];
   //delete this._saved[key];
@@ -2497,7 +2505,6 @@ Program.prototype.text = function(text, attr) {
 // NOTE: sun-color may not allow multiple params for SGR.
 Program.prototype._attr = function(param, val) {
   var self = this
-    , param
     , parts
     , color
     , m;
@@ -2557,7 +2564,6 @@ Program.prototype._attr = function(param, val) {
       return val === false
         ? '\x1b[27m'
         : '\x1b[7m';
-      break;
     case 'invisible':
       return val === false
         ? '\x1b[28m'
@@ -2952,7 +2958,7 @@ Program.prototype.charPosAbsolute = function(param) {
   if (this.tput) {
     return this.put.hpa.apply(this.put, arguments);
   }
-  var param = slice.call(arguments).join(';');
+  param = slice.call(arguments).join(';');
   return this._write('\x1b[' + (param || '') + '`');
 };
 
@@ -3020,7 +3026,7 @@ Program.prototype.linePosAbsolute = function(param) {
   if (this.tput) {
     return this.put.vpa.apply(this.put, arguments);
   }
-  var param = slice.call(arguments).join(';');
+  param = slice.call(arguments).join(';');
   return this._write('\x1b[' + (param || '') + 'd');
 };
 
@@ -3886,7 +3892,7 @@ Program.prototype.setAttrInRectangle = function() {
 // CSI ? Pm s
 //   Save DEC Private Mode Values.  Ps values are the same as for
 //   DECSET.
-Program.prototype.savePrivateValues = function(params) {
+Program.prototype.savePrivateValues = function() {
   return this._write('\x1b[?' + slice.call(arguments).join(';') + 's');
 };
 
@@ -3958,7 +3964,7 @@ Program.prototype.getWindowSize = function(callback) {
 //     Ps denotes the attributes to reverse, i.e.,  1, 4, 5, 7.
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decrara =
-Program.prototype.reverseAttrInRectangle = function(params) {
+Program.prototype.reverseAttrInRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '$t');
 };
 
@@ -3971,7 +3977,7 @@ Program.prototype.reverseAttrInRectangle = function(params) {
 //     Ps = 3  -> Query window/icon labels using UTF-8.  (See dis-
 //     cussion of "Title Modes")
 // XXX VTE bizarelly echos this:
-Program.prototype.setTitleModeFeature = function(params) {
+Program.prototype.setTitleModeFeature = function() {
   return this._twrite('\x1b[>' + slice.call(arguments).join(';') + 't');
 };
 
@@ -3981,7 +3987,7 @@ Program.prototype.setTitleModeFeature = function(params) {
 //     Ps = 2 , 3  or 4  -> low.
 //     Ps = 5 , 6 , 7 , or 8  -> high.
 Program.prototype.decswbv =
-Program.prototype.setWarningBellVolume = function(params) {
+Program.prototype.setWarningBellVolume = function(param) {
   return this._write('\x1b[' + (param || '') + ' t');
 };
 
@@ -3991,7 +3997,7 @@ Program.prototype.setWarningBellVolume = function(params) {
 //     Ps = 2 , 3  or 4  -> low.
 //     Ps = 0 , 5 , 6 , 7 , or 8  -> high.
 Program.prototype.decsmbv =
-Program.prototype.setMarginBellVolume = function(params) {
+Program.prototype.setMarginBellVolume = function(param) {
   return this._write('\x1b[' + (param || '') + ' u');
 };
 
@@ -4003,7 +4009,7 @@ Program.prototype.setMarginBellVolume = function(params) {
 //     Pp denotes the target page.
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.deccra =
-Program.prototype.copyRectangle = function(params) {
+Program.prototype.copyRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '$v');
 };
 
@@ -4019,7 +4025,7 @@ Program.prototype.copyRectangle = function(params) {
 //   ted, any locator motion will be reported.  DECELR always can-
 //   cels any prevous rectangle definition.
 Program.prototype.decefr =
-Program.prototype.enableFilterRectangle = function(params) {
+Program.prototype.enableFilterRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '\'w');
 };
 
@@ -4035,7 +4041,7 @@ Program.prototype.enableFilterRectangle = function(params) {
 //     Pn = 1  <- clock multiplier.
 //     Pn = 0  <- STP flags.
 Program.prototype.decreqtparm =
-Program.prototype.requestParameters = function(params) {
+Program.prototype.requestParameters = function(param) {
   return this._write('\x1b[' + (param || 0) + 'x');
 };
 
@@ -4044,7 +4050,7 @@ Program.prototype.requestParameters = function(params) {
 //     Ps = 1  -> from start to end position, wrapped.
 //     Ps = 2  -> rectangle (exact).
 Program.prototype.decsace =
-Program.prototype.selectChangeExtent = function(params) {
+Program.prototype.selectChangeExtent = function(param) {
   return this._write('\x1b[' + (param || 0) + 'x');
 };
 
@@ -4054,7 +4060,7 @@ Program.prototype.selectChangeExtent = function(params) {
 //     Pt; Pl; Pb; Pr denotes the rectangle.
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decfra =
-Program.prototype.fillRectangle = function(params) {
+Program.prototype.fillRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '$x');
 };
 
@@ -4071,7 +4077,7 @@ Program.prototype.fillRectangle = function(params) {
 //     Pu = 1  <- device physical pixels.
 //     Pu = 2  <- character cells.
 Program.prototype.decelr =
-Program.prototype.enableLocatorReporting = function(params) {
+Program.prototype.enableLocatorReporting = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '\'z');
 };
 
@@ -4080,7 +4086,7 @@ Program.prototype.enableLocatorReporting = function(params) {
 //     Pt; Pl; Pb; Pr denotes the rectangle.
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decera =
-Program.prototype.eraseRectangle = function(params) {
+Program.prototype.eraseRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '$z');
 };
 
@@ -4096,7 +4102,7 @@ Program.prototype.eraseRectangle = function(params) {
 //     Ps = 3  -> report button up transitions.
 //     Ps = 4  -> do not report button up transitions.
 Program.prototype.decsle =
-Program.prototype.setLocatorEvents = function(params) {
+Program.prototype.setLocatorEvents = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '\'{');
 };
 
@@ -4104,7 +4110,7 @@ Program.prototype.setLocatorEvents = function(params) {
 //   Selective Erase Rectangular Area (DECSERA), VT400 and up.
 //     Pt; Pl; Pb; Pr denotes the rectangle.
 Program.prototype.decsera =
-Program.prototype.selectiveEraseRectangle = function(params) {
+Program.prototype.selectiveEraseRectangle = function() {
   return this._write('\x1b[' + slice.call(arguments).join(';') + '${');
 };
 
@@ -4151,13 +4157,13 @@ Program.prototype.selectiveEraseRectangle = function(params) {
 Program.prototype.decrqlp =
 Program.prototype.req_mouse_pos =
 Program.prototype.reqmp =
-Program.prototype.requestLocatorPosition = function(params, callback) {
+Program.prototype.requestLocatorPosition = function(param, callback) {
   // See also:
   // get_mouse / getm / Gm
   // mouse_info / minfo / Mi
   // Correct for tput?
   if (this.has('req_mouse_pos')) {
-    var code = this.tput.req_mouse_pos.apply(this.tput, params);
+    var code = this.tput.req_mouse_pos(param);
     return this.response('locator-position', code, callback);
   }
   return this.response('locator-position',
@@ -4181,6 +4187,7 @@ Program.prototype.deleteColumns = function() {
 };
 
 Program.prototype.out = function(name) {
+  var args = Array.prototype.slice.call(arguments, 1);
   this.ret = true;
   var out = this[name].apply(this, args);
   this.ret = false;
@@ -4234,7 +4241,7 @@ Program.prototype.pause = function(callback) {
   };
 };
 
-Program.prototype.resume = function(callback) {
+Program.prototype.resume = function() {
   if (this._resume) return this._resume();
 };
 
@@ -4252,7 +4259,7 @@ function unshiftEvent(obj, event, listener) {
   listeners.forEach(function(listener) {
     obj.on(event, listener);
   });
-};
+}
 
 function merge(out) {
   slice.call(arguments, 1).forEach(function(obj) {
diff --git a/lib/tput.js b/lib/tput.js
index 5c2feaa..13da1c9 100644
--- a/lib/tput.js
+++ b/lib/tput.js
@@ -61,7 +61,7 @@ function Tput(options) {
   if (options.terminal || options.term) {
     this.setup();
   }
-};
+}
 
 Tput.prototype.setup = function() {
   try {
@@ -145,11 +145,12 @@ Tput.ipaths = [
 ];
 
 Tput.prototype.readTerminfo = function(term) {
-  var term = term || this.terminal
-    , data
+  var data
     , file
     , info;
 
+  term = term || this.terminal;
+
   file = path.normalize(this._prefix(term));
   data = fs.readFileSync(file);
   info = this.parseTerminfo(data, file);
@@ -199,7 +200,6 @@ Tput.prototype._tprefix = function(prefix, term, soft) {
 
   var file
     , dir
-    , ch
     , i
     , sdiff
     , sfile
@@ -718,8 +718,7 @@ Tput.prototype.inject = function(info) {
 // ~/ncurses/ncurses/tinfo/lib_tparm.c
 // ~/ncurses/ncurses/tinfo/comp_scan.c
 Tput.prototype._compile = function(info, key, str) {
-  var self = this
-    , v;
+  var v;
 
   this._debug('Compiling %s: %s', key, JSON.stringify(str));
 
@@ -1165,9 +1164,10 @@ Tput.prototype._compile = function(info, key, str) {
 
 // See: ~/ncurses/ncurses/tinfo/lib_tputs.c
 Tput.prototype._print = function(code, print, done) {
-  var print = print || write
-    , done = done || noop
-    , xon = !this.bools.needs_xon_xoff || this.bools.xon_xoff;
+  var xon = !this.bools.needs_xon_xoff || this.bools.xon_xoff;
+
+  print = print || write;
+  done = done || noop;
 
   if (!this.padding) {
     print(code);
@@ -1185,8 +1185,8 @@ Tput.prototype._print = function(code, print, done) {
     var part = parts[i++]
       , padding = /^\$<([\d.]+)([*\/]{0,2})>/.exec(part)
       , amount
-      , suffix
-      , affect;
+      , suffix;
+      // , affect;
 
     if (!padding) {
       print(part);
@@ -1259,12 +1259,12 @@ Tput.cpaths = [
 
 Tput.prototype.readTermcap = function(term) {
   var self = this
-    , term = term || this.terminal
     , terms
     , term_
     , root
-    , paths
-    , i;
+    , paths;
+
+  term = term || this.terminal;
 
   // Termcap has a bunch of terminals usually stored in one file/string,
   // so we need to find the one containing our desired terminal.
@@ -2069,8 +2069,8 @@ Tput.prototype.detectBrokenACS = function(info) {
   }
 
   // If the terminal supports unicode, we don't need ACS.
-  if (info.numbers['U8'] >= 0) {
-    return !!info.numbers['U8'];
+  if (info.numbers.U8 >= 0) {
+    return !!info.numbers.U8;
   }
 
   // The linux console is just broken for some reason.
@@ -2088,7 +2088,7 @@ Tput.prototype.detectBrokenACS = function(info) {
 
   // screen termcap is bugged?
   if (this.termcap
-      && info.name.indexOf('screen') == 0
+      && info.name.indexOf('screen') === 0
       && process.env.TERMCAP
       && ~process.env.TERMCAP.indexOf('screen')
       && ~process.env.TERMCAP.indexOf('hhII00')) {
@@ -2116,15 +2116,15 @@ Tput.prototype.detectPCRomSet = function(info) {
   return false;
 };
 
-Tput.prototype.detectMagicCookie = function(info) {
+Tput.prototype.detectMagicCookie = function() {
   return process.env.NCURSES_NO_MAGIC_COOKIE == null;
 };
 
-Tput.prototype.detectPadding = function(info) {
+Tput.prototype.detectPadding = function() {
   return process.env.NCURSES_NO_PADDING == null;
 };
 
-Tput.prototype.detectSetbuf = function(info) {
+Tput.prototype.detectSetbuf = function() {
   return process.env.NCURSES_NO_SETBUF == null;
 };
 
@@ -2388,8 +2388,9 @@ Object.keys(Tput.alias).forEach(function(key) {
 });
 
 Tput.prototype.has = function(name) {
-  var name = Tput.aliasMap[name]
-    , val = this.all[name];
+  name = Tput.aliasMap[name];
+
+  var val = this.all[name];
 
   if (!name) return false;
 
diff --git a/lib/unicode.js b/lib/unicode.js
index 04f77ef..ba50a53 100644
--- a/lib/unicode.js
+++ b/lib/unicode.js
@@ -142,9 +142,9 @@ exports.charWidth = function(str, i) {
   // check for double-wide
   // if (point >= 0x1100
   //     && (point <= 0x115f // Hangul Jamo init. consonants
-  //     || point == 0x2329 || point == 0x232a
+  //     || point === 0x2329 || point === 0x232a
   //     || (point >= 0x2e80 && point <= 0xa4cf
-  //     && point != 0x303f) // CJK ... Yi
+  //     && point !== 0x303f) // CJK ... Yi
   //     || (point >= 0xac00 && point <= 0xd7a3) // Hangul Syllables
   //     || (point >= 0xf900 && point <= 0xfaff) // CJK Compatibility Ideographs
   //     || (point >= 0xfe10 && point <= 0xfe19) // Vertical forms
@@ -157,7 +157,7 @@ exports.charWidth = function(str, i) {
   // }
 
   // check for double-wide
-  if ((0x3000 == point)
+  if ((0x3000 === point)
       || (0xFF01 <= point && point <= 0xFF60)
       || (0xFFE0 <= point && point <= 0xFFE6)) {
     return 2;
@@ -208,129 +208,129 @@ exports.charWidth = function(str, i) {
   // http://www.unicode.org/reports/tr11/
   // http://www.unicode.org/reports/tr11/#Ambiguous
   if (process.env.NCURSES_CJK_WIDTH) {
-    if ((0x00A1 == point)
-        || (0x00A4 == point)
+    if ((0x00A1 === point)
+        || (0x00A4 === point)
         || (0x00A7 <= point && point <= 0x00A8)
-        || (0x00AA == point)
+        || (0x00AA === point)
         || (0x00AD <= point && point <= 0x00AE)
         || (0x00B0 <= point && point <= 0x00B4)
         || (0x00B6 <= point && point <= 0x00BA)
         || (0x00BC <= point && point <= 0x00BF)
-        || (0x00C6 == point)
-        || (0x00D0 == point)
+        || (0x00C6 === point)
+        || (0x00D0 === point)
         || (0x00D7 <= point && point <= 0x00D8)
         || (0x00DE <= point && point <= 0x00E1)
-        || (0x00E6 == point)
+        || (0x00E6 === point)
         || (0x00E8 <= point && point <= 0x00EA)
         || (0x00EC <= point && point <= 0x00ED)
-        || (0x00F0 == point)
+        || (0x00F0 === point)
         || (0x00F2 <= point && point <= 0x00F3)
         || (0x00F7 <= point && point <= 0x00FA)
-        || (0x00FC == point)
-        || (0x00FE == point)
-        || (0x0101 == point)
-        || (0x0111 == point)
-        || (0x0113 == point)
-        || (0x011B == point)
+        || (0x00FC === point)
+        || (0x00FE === point)
+        || (0x0101 === point)
+        || (0x0111 === point)
+        || (0x0113 === point)
+        || (0x011B === point)
         || (0x0126 <= point && point <= 0x0127)
-        || (0x012B == point)
+        || (0x012B === point)
         || (0x0131 <= point && point <= 0x0133)
-        || (0x0138 == point)
+        || (0x0138 === point)
         || (0x013F <= point && point <= 0x0142)
-        || (0x0144 == point)
+        || (0x0144 === point)
         || (0x0148 <= point && point <= 0x014B)
-        || (0x014D == point)
+        || (0x014D === point)
         || (0x0152 <= point && point <= 0x0153)
         || (0x0166 <= point && point <= 0x0167)
-        || (0x016B == point)
-        || (0x01CE == point)
-        || (0x01D0 == point)
-        || (0x01D2 == point)
-        || (0x01D4 == point)
-        || (0x01D6 == point)
-        || (0x01D8 == point)
-        || (0x01DA == point)
-        || (0x01DC == point)
-        || (0x0251 == point)
-        || (0x0261 == point)
-        || (0x02C4 == point)
-        || (0x02C7 == point)
+        || (0x016B === point)
+        || (0x01CE === point)
+        || (0x01D0 === point)
+        || (0x01D2 === point)
+        || (0x01D4 === point)
+        || (0x01D6 === point)
+        || (0x01D8 === point)
+        || (0x01DA === point)
+        || (0x01DC === point)
+        || (0x0251 === point)
+        || (0x0261 === point)
+        || (0x02C4 === point)
+        || (0x02C7 === point)
         || (0x02C9 <= point && point <= 0x02CB)
-        || (0x02CD == point)
-        || (0x02D0 == point)
+        || (0x02CD === point)
+        || (0x02D0 === point)
         || (0x02D8 <= point && point <= 0x02DB)
-        || (0x02DD == point)
-        || (0x02DF == point)
+        || (0x02DD === point)
+        || (0x02DF === point)
         || (0x0300 <= point && point <= 0x036F)
         || (0x0391 <= point && point <= 0x03A1)
         || (0x03A3 <= point && point <= 0x03A9)
         || (0x03B1 <= point && point <= 0x03C1)
         || (0x03C3 <= point && point <= 0x03C9)
-        || (0x0401 == point)
+        || (0x0401 === point)
         || (0x0410 <= point && point <= 0x044F)
-        || (0x0451 == point)
-        || (0x2010 == point)
+        || (0x0451 === point)
+        || (0x2010 === point)
         || (0x2013 <= point && point <= 0x2016)
         || (0x2018 <= point && point <= 0x2019)
         || (0x201C <= point && point <= 0x201D)
         || (0x2020 <= point && point <= 0x2022)
         || (0x2024 <= point && point <= 0x2027)
-        || (0x2030 == point)
+        || (0x2030 === point)
         || (0x2032 <= point && point <= 0x2033)
-        || (0x2035 == point)
-        || (0x203B == point)
-        || (0x203E == point)
-        || (0x2074 == point)
-        || (0x207F == point)
+        || (0x2035 === point)
+        || (0x203B === point)
+        || (0x203E === point)
+        || (0x2074 === point)
+        || (0x207F === point)
         || (0x2081 <= point && point <= 0x2084)
-        || (0x20AC == point)
-        || (0x2103 == point)
-        || (0x2105 == point)
-        || (0x2109 == point)
-        || (0x2113 == point)
-        || (0x2116 == point)
+        || (0x20AC === point)
+        || (0x2103 === point)
+        || (0x2105 === point)
+        || (0x2109 === point)
+        || (0x2113 === point)
+        || (0x2116 === point)
         || (0x2121 <= point && point <= 0x2122)
-        || (0x2126 == point)
-        || (0x212B == point)
+        || (0x2126 === point)
+        || (0x212B === point)
         || (0x2153 <= point && point <= 0x2154)
         || (0x215B <= point && point <= 0x215E)
         || (0x2160 <= point && point <= 0x216B)
         || (0x2170 <= point && point <= 0x2179)
-        || (0x2189 == point)
+        || (0x2189 === point)
         || (0x2190 <= point && point <= 0x2199)
         || (0x21B8 <= point && point <= 0x21B9)
-        || (0x21D2 == point)
-        || (0x21D4 == point)
-        || (0x21E7 == point)
-        || (0x2200 == point)
+        || (0x21D2 === point)
+        || (0x21D4 === point)
+        || (0x21E7 === point)
+        || (0x2200 === point)
         || (0x2202 <= point && point <= 0x2203)
         || (0x2207 <= point && point <= 0x2208)
-        || (0x220B == point)
-        || (0x220F == point)
-        || (0x2211 == point)
-        || (0x2215 == point)
-        || (0x221A == point)
+        || (0x220B === point)
+        || (0x220F === point)
+        || (0x2211 === point)
+        || (0x2215 === point)
+        || (0x221A === point)
         || (0x221D <= point && point <= 0x2220)
-        || (0x2223 == point)
-        || (0x2225 == point)
+        || (0x2223 === point)
+        || (0x2225 === point)
         || (0x2227 <= point && point <= 0x222C)
-        || (0x222E == point)
+        || (0x222E === point)
         || (0x2234 <= point && point <= 0x2237)
         || (0x223C <= point && point <= 0x223D)
-        || (0x2248 == point)
-        || (0x224C == point)
-        || (0x2252 == point)
+        || (0x2248 === point)
+        || (0x224C === point)
+        || (0x2252 === point)
         || (0x2260 <= point && point <= 0x2261)
         || (0x2264 <= point && point <= 0x2267)
         || (0x226A <= point && point <= 0x226B)
         || (0x226E <= point && point <= 0x226F)
         || (0x2282 <= point && point <= 0x2283)
         || (0x2286 <= point && point <= 0x2287)
-        || (0x2295 == point)
-        || (0x2299 == point)
-        || (0x22A5 == point)
-        || (0x22BF == point)
-        || (0x2312 == point)
+        || (0x2295 === point)
+        || (0x2299 === point)
+        || (0x22A5 === point)
+        || (0x22BF === point)
+        || (0x2312 === point)
         || (0x2460 <= point && point <= 0x24E9)
         || (0x24EB <= point && point <= 0x254B)
         || (0x2550 <= point && point <= 0x2573)
@@ -343,37 +343,37 @@ exports.charWidth = function(str, i) {
         || (0x25BC <= point && point <= 0x25BD)
         || (0x25C0 <= point && point <= 0x25C1)
         || (0x25C6 <= point && point <= 0x25C8)
-        || (0x25CB == point)
+        || (0x25CB === point)
         || (0x25CE <= point && point <= 0x25D1)
         || (0x25E2 <= point && point <= 0x25E5)
-        || (0x25EF == point)
+        || (0x25EF === point)
         || (0x2605 <= point && point <= 0x2606)
-        || (0x2609 == point)
+        || (0x2609 === point)
         || (0x260E <= point && point <= 0x260F)
         || (0x2614 <= point && point <= 0x2615)
-        || (0x261C == point)
-        || (0x261E == point)
-        || (0x2640 == point)
-        || (0x2642 == point)
+        || (0x261C === point)
+        || (0x261E === point)
+        || (0x2640 === point)
+        || (0x2642 === point)
         || (0x2660 <= point && point <= 0x2661)
         || (0x2663 <= point && point <= 0x2665)
         || (0x2667 <= point && point <= 0x266A)
         || (0x266C <= point && point <= 0x266D)
-        || (0x266F == point)
+        || (0x266F === point)
         || (0x269E <= point && point <= 0x269F)
         || (0x26BE <= point && point <= 0x26BF)
         || (0x26C4 <= point && point <= 0x26CD)
         || (0x26CF <= point && point <= 0x26E1)
-        || (0x26E3 == point)
+        || (0x26E3 === point)
         || (0x26E8 <= point && point <= 0x26FF)
-        || (0x273D == point)
-        || (0x2757 == point)
+        || (0x273D === point)
+        || (0x2757 === point)
         || (0x2776 <= point && point <= 0x277F)
         || (0x2B55 <= point && point <= 0x2B59)
         || (0x3248 <= point && point <= 0x324F)
         || (0xE000 <= point && point <= 0xF8FF)
         || (0xFE00 <= point && point <= 0xFE0F)
-        || (0xFFFD == point)
+        || (0xFFFD === point)
         || (0x1F100 <= point && point <= 0x1F10A)
         || (0x1F110 <= point && point <= 0x1F12D)
         || (0x1F130 <= point && point <= 0x1F169)
@@ -484,7 +484,7 @@ exports.codePointAt = function(str, position) {
   var size = string.length;
   // `ToInteger`
   var index = position ? Number(position) : 0;
-  if (index != index) { // better `isNaN`
+  if (index !== index) { // better `isNaN`
     index = 0;
   }
   // Account for out-of-bounds indices:
@@ -541,7 +541,7 @@ exports.fromCodePoint = function() {
       !isFinite(codePoint) ||       // `NaN`, `+Infinity`, or `-Infinity`
       codePoint < 0 ||              // not a valid Unicode code point
       codePoint > 0x10FFFF ||       // not a valid Unicode code point
-      floor(codePoint) != codePoint // not an integer
+      floor(codePoint) !== codePoint // not an integer
     ) {
       throw RangeError('Invalid code point: ' + codePoint);
     }
@@ -554,7 +554,7 @@ exports.fromCodePoint = function() {
       lowSurrogate = (codePoint % 0x400) + 0xDC00;
       codeUnits.push(highSurrogate, lowSurrogate);
     }
-    if (index + 1 == length || codeUnits.length > MAX_SIZE) {
+    if (index + 1 === length || codeUnits.length > MAX_SIZE) {
       result += stringFromCharCode.apply(null, codeUnits);
       codeUnits.length = 0;
     }
diff --git a/lib/widgets/ansiimage.js b/lib/widgets/ansiimage.js
index 4578724..35ab285 100644
--- a/lib/widgets/ansiimage.js
+++ b/lib/widgets/ansiimage.js
@@ -8,11 +8,8 @@
  * Modules
  */
 
-var cp = require('child_process')
-  , path = require('path')
-  , fs = require('fs');
+var cp = require('child_process');
 
-var helpers = require('../helpers');
 var colors = require('../colors');
 
 var Node = require('./node');
@@ -148,8 +145,6 @@ ANSIImage.prototype.clearImage = function() {
 };
 
 ANSIImage.prototype.render = function() {
-  var self = this;
-
   var coords = this._render();
   if (!coords) return;
 
diff --git a/lib/widgets/bigtext.js b/lib/widgets/bigtext.js
index ead8d14..315da33 100644
--- a/lib/widgets/bigtext.js
+++ b/lib/widgets/bigtext.js
@@ -10,8 +10,6 @@
 
 var fs = require('fs');
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
diff --git a/lib/widgets/box.js b/lib/widgets/box.js
index 259be75..43f7257 100644
--- a/lib/widgets/box.js
+++ b/lib/widgets/box.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Element = require('./element');
 
diff --git a/lib/widgets/button.js b/lib/widgets/button.js
index 5afb674..18383d4 100644
--- a/lib/widgets/button.js
+++ b/lib/widgets/button.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Input = require('./input');
 
diff --git a/lib/widgets/checkbox.js b/lib/widgets/checkbox.js
index 36d5ef6..349a52b 100644
--- a/lib/widgets/checkbox.js
+++ b/lib/widgets/checkbox.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Input = require('./input');
 
@@ -45,7 +43,7 @@ function Checkbox(options) {
     });
   }
 
-  this.on('focus', function(old) {
+  this.on('focus', function() {
     var lpos = self.lpos;
     if (!lpos) return;
     self.screen.program.lsaveCursor('checkbox');
diff --git a/lib/widgets/element.js b/lib/widgets/element.js
index 13de251..29a783c 100644
--- a/lib/widgets/element.js
+++ b/lib/widgets/element.js
@@ -589,7 +589,6 @@ Element.prototype._wrapContent = function(content, width) {
     , margin = 0
     , rtof = []
     , ftor = []
-    , fake = []
     , out = []
     , no = 0
     , line
@@ -860,16 +859,16 @@ Element.prototype.disableDrag = function() {
   return this._draggable = false;
 };
 
-Element.prototype.key = function(key, listener) {
+Element.prototype.key = function() {
   return this.screen.program.key.apply(this, arguments);
 };
 
-Element.prototype.onceKey = function(key, listener) {
+Element.prototype.onceKey = function() {
   return this.screen.program.onceKey.apply(this, arguments);
 };
 
 Element.prototype.unkey =
-Element.prototype.removeKey = function(key, listener) {
+Element.prototype.removeKey = function() {
   return this.screen.program.unkey.apply(this, arguments);
 };
 
@@ -886,7 +885,7 @@ Element.prototype.setIndex = function(index) {
   var i = this.parent.children.indexOf(this);
   if (!~i) return;
 
-  var item = this.parent.children.splice(i, 1)[0]
+  var item = this.parent.children.splice(i, 1)[0];
   this.parent.children.splice(index, 0, item);
 };
 
@@ -962,7 +961,6 @@ Element.prototype.setLabel = function(options) {
   }
 
   var reposition = function() {
-    var visible = self.height - self.iheight;
     self._label.rtop = (self.childBase || 0) - self.itop;
     if (!self.screen.autoPadding) {
       self._label.rtop = (self.childBase || 0);
@@ -992,8 +990,6 @@ Element.prototype.removeLabel = function() {
 };
 
 Element.prototype.setHover = function(options) {
-  var self = this;
-
   if (typeof options === 'string') {
     options = { text: options };
   }
@@ -1605,7 +1601,7 @@ Element.prototype._getShrinkBox = function(xi, xl, yi, yl, get) {
   return { xi: xi, xl: xl, yi: yi, yl: yl };
 };
 
-Element.prototype._getShrinkContent = function(xi, xl, yi, yl, get) {
+Element.prototype._getShrinkContent = function(xi, xl, yi, yl) {
   var h = this._clines.length
     , w = this._clines.mwidth || 1;
 
@@ -2429,12 +2425,16 @@ Element.prototype.deleteLine = function(i, n) {
 
   diff = start - this._clines.length;
 
+  // XXX clearPos() without diff statement?
+  var height = 0;
+
   if (diff > 0) {
     var pos = this._getCoords();
     if (!pos) return;
 
-    var height = pos.yl - pos.yi - this.iheight
-      , base = this.childBase || 0
+    height = pos.yl - pos.yi - this.iheight;
+
+    var base = this.childBase || 0
       , visible = real >= base && real - base < height;
 
     if (pos && visible && this.screen.cleanSides(this)) {
@@ -2471,9 +2471,10 @@ Element.prototype.deleteTop = function(n) {
 Element.prototype.deleteBottom = function(n) {
   var h = (this.childBase || 0) + this.height - 1 - this.iheight
     , i = Math.min(h, this._clines.length - 1)
-    , n = n || 1
     , fake = this._clines.rtof[i];
 
+  n = n || 1;
+
   return this.deleteLine(fake - (n - 1), n);
 };
 
diff --git a/lib/widgets/form.js b/lib/widgets/form.js
index 5e00b39..4399a47 100644
--- a/lib/widgets/form.js
+++ b/lib/widgets/form.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -165,8 +163,7 @@ Form.prototype.focusLast = function() {
 };
 
 Form.prototype.submit = function() {
-  var self = this
-    , out = {};
+  var out = {};
 
   this.children.forEach(function fn(el) {
     if (el.value != null) {
diff --git a/lib/widgets/image.js b/lib/widgets/image.js
index c2e56d4..647d9c8 100644
--- a/lib/widgets/image.js
+++ b/lib/widgets/image.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -18,8 +16,6 @@ var Box = require('./box');
  */
 
 function Image(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Image(options);
   }
diff --git a/lib/widgets/input.js b/lib/widgets/input.js
index c5c150b..32914cc 100644
--- a/lib/widgets/input.js
+++ b/lib/widgets/input.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
diff --git a/lib/widgets/layout.js b/lib/widgets/layout.js
index 4dc52db..ca145d7 100644
--- a/lib/widgets/layout.js
+++ b/lib/widgets/layout.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Element = require('./element');
 
@@ -18,8 +16,6 @@ var Element = require('./element');
  */
 
 function Layout(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Layout(options);
   }
@@ -80,9 +76,7 @@ Layout.prototype.renderer = function(coords) {
   var width = coords.xl - coords.xi
     , height = coords.yl - coords.yi
     , xi = coords.xi
-    , xl = coords.xl
-    , yi = coords.yi
-    , yl = coords.yl;
+    , yi = coords.yi;
 
   // The current row offset in cells (which row are we on?)
   var rowOffset = 0;
@@ -175,8 +169,6 @@ Layout.prototype.renderer = function(coords) {
 };
 
 Layout.prototype.render = function() {
-  var self = this;
-
   this._emit('prerender');
 
   var coords = this._renderCoords();
diff --git a/lib/widgets/line.js b/lib/widgets/line.js
index be53240..74de715 100644
--- a/lib/widgets/line.js
+++ b/lib/widgets/line.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -18,8 +16,6 @@ var Box = require('./box');
  */
 
 function Line(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Line(options);
   }
diff --git a/lib/widgets/list.js b/lib/widgets/list.js
index 0d3b7d3..83d0bd5 100644
--- a/lib/widgets/list.js
+++ b/lib/widgets/list.js
@@ -92,11 +92,11 @@ function List(options) {
 
   if (options.mouse) {
     this.screen._listenMouse(this);
-    this.on('element wheeldown', function(el, data) {
+    this.on('element wheeldown', function() {
       self.select(self.selected + 2);
       self.screen.render();
     });
-    this.on('element wheelup', function(el, data) {
+    this.on('element wheelup', function() {
       self.select(self.selected - 2);
       self.screen.render();
     });
@@ -274,7 +274,7 @@ List.prototype.createItem = function(content) {
   var item = new Box(options);
 
   if (this.mouse) {
-    item.on('click', function(data) {
+    item.on('click', function() {
       self.focus();
       if (self.items[self.selected] === item) {
         self.emit('action', item, self.selected);
@@ -294,8 +294,6 @@ List.prototype.createItem = function(content) {
 List.prototype.add =
 List.prototype.addItem =
 List.prototype.appendItem = function(content) {
-  var self = this;
-
   content = typeof content === 'string' ? content : content.getContent();
 
   var item = this.createItem(content);
@@ -370,12 +368,13 @@ List.prototype.clearItems = function() {
 };
 
 List.prototype.setItems = function(items) {
-  var items = items.slice()
-    , original = this.items.slice()
+  var original = this.items.slice()
     , selected = this.selected
     , sel = this.ritems[this.selected]
     , i = 0;
 
+  items = items.slice();
+
   this.select(0);
 
   for (; i < items.length; i++) {
@@ -440,7 +439,8 @@ List.prototype.spliceItem = function(child, n) {
 
 List.prototype.find =
 List.prototype.fuzzyFind = function(search, back) {
-  var start = this.selected + (back ? -1 : 1);
+  var start = this.selected + (back ? -1 : 1)
+    , i;
 
   if (typeof search === 'number') search += '';
 
@@ -464,17 +464,17 @@ List.prototype.fuzzyFind = function(search, back) {
   }
 
   if (!back) {
-    for (var i = start; i < this.ritems.length; i++){
+    for (i = start; i < this.ritems.length; i++) {
       if (test(helpers.cleanTags(this.ritems[i]))) return i;
     }
-    for (var i = 0; i < start; i++){
+    for (i = 0; i < start; i++) {
       if (test(helpers.cleanTags(this.ritems[i]))) return i;
     }
   } else {
-    for (var i = start; i >= 0; i--){
+    for (i = start; i >= 0; i--) {
       if (test(helpers.cleanTags(this.ritems[i]))) return i;
     }
-    for (var i = this.ritems.length - 1; i > start; i--){
+    for (i = this.ritems.length - 1; i > start; i--) {
       if (test(helpers.cleanTags(this.ritems[i]))) return i;
     }
   }
diff --git a/lib/widgets/listbar.js b/lib/widgets/listbar.js
index ac46768..36d539a 100644
--- a/lib/widgets/listbar.js
+++ b/lib/widgets/listbar.js
@@ -89,7 +89,7 @@ function Listbar(options) {
   }
 
   if (options.autoCommandKeys) {
-    this.onScreenEvent('keypress', function(ch, key) {
+    this.onScreenEvent('keypress', function(ch) {
       if (/^[0-9]$/.test(ch)) {
         var i = +ch - 1;
         if (!~i) i = 9;
@@ -165,7 +165,7 @@ Listbar.prototype.appendItem = function(item, callback) {
   if (!this.parent) {
     drawn = 0;
   } else {
-    drawn = prev ? prev.aleft + prev.width : 0
+    drawn = prev ? prev.aleft + prev.width : 0;
     if (!this.screen.autoPadding) {
       drawn += this.ileft;
     }
@@ -246,7 +246,7 @@ Listbar.prototype.appendItem = function(item, callback) {
 
   if (cmd.callback) {
     if (cmd.keys) {
-      this.screen.key(cmd.keys, function(ch, key) {
+      this.screen.key(cmd.keys, function() {
         self.emit('action', el, self.selected);
         self.emit('select', el, self.selected);
         if (el._.cmd.callback) {
@@ -264,7 +264,7 @@ Listbar.prototype.appendItem = function(item, callback) {
 
   // XXX May be affected by new element.options.mouse option.
   if (this.mouse) {
-    el.on('click', function(data) {
+    el.on('click', function() {
       self.emit('action', el, self.selected);
       self.emit('select', el, self.selected);
       if (el._.cmd.callback) {
@@ -311,7 +311,7 @@ Listbar.prototype.select = function(offset) {
   }
 
   if (!this.parent) {
-    this.emit('select item', el, offset);
+    this.emit('select item', this.items[offset], offset);
     return;
   }
 
diff --git a/lib/widgets/listtable.js b/lib/widgets/listtable.js
index 311f9fd..7f7e38e 100644
--- a/lib/widgets/listtable.js
+++ b/lib/widgets/listtable.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 var List = require('./list');
@@ -104,7 +102,6 @@ ListTable.prototype.setData = function(rows) {
 
   this.rows.forEach(function(row, i) {
     var isHeader = i === 0;
-    var isFooter = i === self.rows.length - 1;
     var text = '';
     row.forEach(function(cell, i) {
       var width = self._maxes[i];
@@ -177,17 +174,14 @@ ListTable.prototype.render = function() {
 
   var lines = this.screen.lines
     , xi = coords.xi
-    , xl = coords.xl
     , yi = coords.yi
-    , yl = coords.yl
     , rx
     , ry
     , i;
 
   var battr = this.sattr(this.style.border);
 
-  var width = coords.xl - coords.xi - this.iright
-    , height = coords.yl - coords.yi - this.ibottom;
+  var height = coords.yl - coords.yi - this.ibottom;
 
   if (!this.border || this.options.noCellBorders) return coords;
 
@@ -196,13 +190,14 @@ ListTable.prototype.render = function() {
   for (i = 0; i < height + 1; i++) {
     if (!lines[yi + ry]) break;
     rx = 0;
-    self._maxes.slice(0, -1).forEach(function(max, i) {
+    self._maxes.slice(0, -1).forEach(function(max) {
       rx += max;
       if (!lines[yi + ry][xi + rx + 1]) return;
       // center
       if (ry === 0) {
         // top
-        lines[yi + ry][xi + ++rx][0] = battr;
+        rx++;
+        lines[yi + ry][xi + rx][0] = battr;
         lines[yi + ry][xi + rx][1] = '\u252c'; // '┬'
         // XXX If we alter iheight and itop for no borders - nothing should be written here
         if (!self.border.top) {
@@ -211,7 +206,8 @@ ListTable.prototype.render = function() {
         lines[yi + ry].dirty = true;
       } else if (ry === height) {
         // bottom
-        lines[yi + ry][xi + ++rx][0] = battr;
+        rx++;
+        lines[yi + ry][xi + rx][0] = battr;
         lines[yi + ry][xi + rx][1] = '\u2534'; // '┴'
         // XXX If we alter iheight and ibottom for no borders - nothing should be written here
         if (!self.border.bottom) {
@@ -220,7 +216,7 @@ ListTable.prototype.render = function() {
         lines[yi + ry].dirty = true;
       } else {
         // middle
-        ++rx;
+        rx++;
       }
     });
     ry += 1;
@@ -230,14 +226,16 @@ ListTable.prototype.render = function() {
   for (ry = 1; ry < height; ry++) {
     if (!lines[yi + ry]) break;
     rx = 0;
-    self._maxes.slice(0, -1).forEach(function(max, i) {
+    self._maxes.slice(0, -1).forEach(function(max) {
       rx += max;
       if (!lines[yi + ry][xi + rx + 1]) return;
       if (self.options.fillCellBorders !== false) {
         var lbg = lines[yi + ry][xi + rx][0] & 0x1ff;
-        lines[yi + ry][xi + ++rx][0] = (battr & ~0x1ff) | lbg;
+        rx++;
+        lines[yi + ry][xi + rx][0] = (battr & ~0x1ff) | lbg;
       } else {
-        lines[yi + ry][xi + ++rx][0] = battr;
+        rx++;
+        lines[yi + ry][xi + rx][0] = battr;
       }
       lines[yi + ry][xi + rx][1] = '\u2502'; // '│'
       lines[yi + ry].dirty = true;
diff --git a/lib/widgets/loading.js b/lib/widgets/loading.js
index a602853..e600d74 100644
--- a/lib/widgets/loading.js
+++ b/lib/widgets/loading.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 var Text = require('./text');
@@ -19,8 +17,6 @@ var Text = require('./text');
  */
 
 function Loading(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Loading(options);
   }
diff --git a/lib/widgets/log.js b/lib/widgets/log.js
index a6268f9..bd253c5 100644
--- a/lib/widgets/log.js
+++ b/lib/widgets/log.js
@@ -12,8 +12,6 @@ var util = require('util');
 
 var nextTick = global.setImmediate || process.nextTick.bind(process);
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var ScrollableText = require('./scrollabletext');
 
diff --git a/lib/widgets/message.js b/lib/widgets/message.js
index 8d3f8aa..463b759 100644
--- a/lib/widgets/message.js
+++ b/lib/widgets/message.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -18,8 +16,6 @@ var Box = require('./box');
  */
 
 function Message(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Message(options);
   }
diff --git a/lib/widgets/node.js b/lib/widgets/node.js
index f631481..7125c7a 100644
--- a/lib/widgets/node.js
+++ b/lib/widgets/node.js
@@ -10,8 +10,6 @@
 
 var EventEmitter = require('../events').EventEmitter;
 
-var helpers = require('../helpers');
-
 /**
  * Node
  */
diff --git a/lib/widgets/overlayimage.js b/lib/widgets/overlayimage.js
index 1631011..40ed135 100644
--- a/lib/widgets/overlayimage.js
+++ b/lib/widgets/overlayimage.js
@@ -123,11 +123,10 @@ OverlayImage.prototype.type = 'overlayimage';
 OverlayImage.w3mdisplay = '/usr/lib/w3m/w3mimgdisplay';
 
 OverlayImage.prototype.spawn = function(file, args, opt, callback) {
-  var screen = this.screen
-    , opt = opt || {}
-    , spawn = require('child_process').spawn
+  var spawn = require('child_process').spawn
     , ps;
 
+  opt = opt || {};
   ps = spawn(file, args, opt);
 
   ps.on('error', function(err) {
@@ -154,7 +153,7 @@ OverlayImage.prototype.setImage = function(img, callback) {
   }
   this._settingImage = true;
 
-  var reset = function(err, success) {
+  var reset = function() {
     self._settingImage = false;
     self._queue = self._queue || [];
     var item = self._queue.shift();
@@ -312,8 +311,6 @@ OverlayImage.prototype.renderImage = function(img, ratio, callback) {
 };
 
 OverlayImage.prototype.clearImage = function(callback) {
-  var self = this;
-
   if (cp.execSync) {
     callback = callback || function(err, result) { return result; };
     try {
@@ -374,7 +371,6 @@ OverlayImage.prototype.clearImage = function(callback) {
 };
 
 OverlayImage.prototype.imageSize = function(callback) {
-  var self = this;
   var img = this.file;
 
   if (cp.execSync) {
@@ -525,8 +521,6 @@ OverlayImage.prototype.getPixelRatio = function(callback) {
 };
 
 OverlayImage.prototype.renderImageSync = function(img, ratio) {
-  var self = this;
-
   if (OverlayImage.hasW3MDisplay === false) {
     throw new Error('W3M Image Display not available.');
   }
@@ -695,8 +689,6 @@ OverlayImage.prototype.termSizeSync = function(_, recurse) {
 };
 
 OverlayImage.prototype.getPixelRatioSync = function() {
-  var self = this;
-
   // XXX We could cache this, but sometimes it's better
   // to recalculate to be pixel perfect.
   if (this._ratio && !this._needsRatio) {
diff --git a/lib/widgets/progressbar.js b/lib/widgets/progressbar.js
index 0abc561..48b47a2 100644
--- a/lib/widgets/progressbar.js
+++ b/lib/widgets/progressbar.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Input = require('./input');
 
diff --git a/lib/widgets/prompt.js b/lib/widgets/prompt.js
index 361b408..64c7406 100644
--- a/lib/widgets/prompt.js
+++ b/lib/widgets/prompt.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 var Button = require('./button');
@@ -20,8 +18,6 @@ var Textbox = require('./textbox');
  */
 
 function Prompt(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Prompt(options);
   }
diff --git a/lib/widgets/question.js b/lib/widgets/question.js
index 5e7f5f9..b1f2098 100644
--- a/lib/widgets/question.js
+++ b/lib/widgets/question.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 var Button = require('./button');
@@ -19,8 +17,6 @@ var Button = require('./button');
  */
 
 function Question(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Question(options);
   }
diff --git a/lib/widgets/radiobutton.js b/lib/widgets/radiobutton.js
index ca2a998..d9556b8 100644
--- a/lib/widgets/radiobutton.js
+++ b/lib/widgets/radiobutton.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Checkbox = require('./checkbox');
 
diff --git a/lib/widgets/radioset.js b/lib/widgets/radioset.js
index cdedcac..a12d23d 100644
--- a/lib/widgets/radioset.js
+++ b/lib/widgets/radioset.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
diff --git a/lib/widgets/screen.js b/lib/widgets/screen.js
index e0f2c04..33d11bc 100644
--- a/lib/widgets/screen.js
+++ b/lib/widgets/screen.js
@@ -22,6 +22,7 @@ var helpers = require('../helpers');
 
 var Node = require('./node');
 var Log = require('./log');
+var Element = require('./element');
 var Box = require('./box');
 
 /**
@@ -554,7 +555,7 @@ Screen.prototype._listenMouse = function(el) {
   // });
 
   // Autofocus elements with the appropriate option.
-  this.on('element click', function(el, data) {
+  this.on('element click', function(el) {
     if (el.clickable === true && el.options.autoFocus !== false) {
       el.focus();
     }
@@ -667,7 +668,7 @@ Screen.prototype._initHover = function() {
   // XXX This can cause problems if the
   // terminal does not support allMotion.
   // Workaround: check to see if content is set.
-  this.on('element mouseup', function(el, data) {
+  this.on('element mouseup', function(el) {
     if (!self._hoverText.getContent()) return;
     if (!el._hoverOptions) return;
     self.append(self._hoverText);
@@ -1739,11 +1740,12 @@ Screen.prototype.spawn = function(file, args, options) {
 
   var screen = this
     , program = screen.program
-    , options = options || {}
     , spawn = require('child_process').spawn
     , mouse = program.mouseEnabled
     , ps;
 
+  options = options || {};
+
   options.stdio = options.stdio || 'inherit';
 
   program.lsaveCursor('spawn');
@@ -1773,8 +1775,8 @@ Screen.prototype.spawn = function(file, args, options) {
     // program.csr(0, program.rows - 1);
     if (mouse) {
       program.enableMouse();
-      if (self.options.sendFocus) {
-        self.program.setMouse({ sendFocus: true }, true);
+      if (screen.options.sendFocus) {
+        screen.program.setMouse({ sendFocus: true }, true);
       }
     }
 
@@ -1794,8 +1796,7 @@ Screen.prototype.spawn = function(file, args, options) {
 };
 
 Screen.prototype.exec = function(file, args, options, callback) {
-  var callback = arguments[arguments.length - 1]
-    , ps = this.spawn(file, args, options);
+  var ps = this.spawn(file, args, options);
 
   ps.on('error', function(err) {
     if (!callback) return;
@@ -1827,7 +1828,6 @@ Screen.prototype.readEditor = function(options, callback) {
   options = options || {};
 
   var self = this
-    , fs = require('fs')
     , editor = options.editor || process.env.EDITOR || 'vi'
     , name = options.name || process.title || 'blessed'
     , rnd = Math.random().toString(36).split('.').pop()
@@ -1862,14 +1862,12 @@ Screen.prototype.readEditor = function(options, callback) {
 };
 
 Screen.prototype.displayImage = function(file, callback) {
-  var self = this;
-
   if (!file) {
     if (!callback) return;
     return callback(new Error('No image.'));
   }
 
-  var file = path.resolve(process.cwd(), file);
+  file = path.resolve(process.cwd(), file);
 
   if (!~file.indexOf('://')) {
     file = 'file://' + file;
@@ -2258,9 +2256,9 @@ var dangles = {
   '\u2502': true  // '│'
 };
 
-var cdangles = {
-  '\u250c': true  // '┌'
-};
+// var cdangles = {
+//   '\u250c': true  // '┌'
+// };
 
 // Every ACS angle character can be
 // represented by 4 bits ordered like this:
diff --git a/lib/widgets/scrollablebox.js b/lib/widgets/scrollablebox.js
index daf760c..ce7310b 100644
--- a/lib/widgets/scrollablebox.js
+++ b/lib/widgets/scrollablebox.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -97,7 +95,7 @@ function ScrollableBox(options) {
           // If mouseup occurs out of the window, no mouseup event fires, and
           // scrollbar will drag again on mousedown until another mouseup
           // occurs.
-          self.onScreenEvent('mouseup', smu = function(data) {
+          self.onScreenEvent('mouseup', smu = function() {
             self._scrollingBar = false;
             self.removeScreenEvent('mousedown', smd);
             self.removeScreenEvent('mouseup', smu);
@@ -108,11 +106,11 @@ function ScrollableBox(options) {
   }
 
   if (options.mouse) {
-    this.on('wheeldown', function(el, data) {
+    this.on('wheeldown', function() {
       self.scroll(self.height / 2 | 0 || 1);
       self.screen.render();
     });
-    this.on('wheelup', function(el, data) {
+    this.on('wheelup', function() {
       self.scroll(-(self.height / 2 | 0) || -1);
       self.screen.render();
     });
diff --git a/lib/widgets/scrollabletext.js b/lib/widgets/scrollabletext.js
index 46d58de..8ecf73a 100644
--- a/lib/widgets/scrollabletext.js
+++ b/lib/widgets/scrollabletext.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var ScrollableBox = require('./scrollablebox');
 
diff --git a/lib/widgets/table.js b/lib/widgets/table.js
index 618cb5a..ba71178 100644
--- a/lib/widgets/table.js
+++ b/lib/widgets/table.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -112,7 +110,6 @@ Table.prototype.setRows =
 Table.prototype.setData = function(rows) {
   var self = this
     , text = ''
-    , line = ''
     , align = this.align;
 
   this.rows = rows || [];
@@ -122,7 +119,6 @@ Table.prototype.setData = function(rows) {
   if (!this._maxes) return;
 
   this.rows.forEach(function(row, i) {
-    var isHeader = i === 0;
     var isFooter = i === self.rows.length - 1;
     row.forEach(function(cell, i) {
       var width = self._maxes[i];
@@ -182,9 +178,7 @@ Table.prototype.render = function() {
 
   var lines = this.screen.lines
     , xi = coords.xi
-    , xl = coords.xl
     , yi = coords.yi
-    , yl = coords.yl
     , rx
     , ry
     , i;
@@ -248,15 +242,18 @@ Table.prototype.render = function() {
         // right side
         if (ry === 0) {
           // top
-          lines[yi + ry][xi + ++rx][0] = battr;
+          rx++;
+          lines[yi + ry][xi + rx][0] = battr;
           // lines[yi + ry][xi + rx][1] = '\u2510'; // '┐'
         } else if (ry / 2 === self.rows.length) {
           // bottom
-          lines[yi + ry][xi + ++rx][0] = battr;
+          rx++;
+          lines[yi + ry][xi + rx][0] = battr;
           // lines[yi + ry][xi + rx][1] = '\u2518'; // '┘'
         } else {
           // middle
-          lines[yi + ry][xi + ++rx][0] = battr;
+          rx++;
+          lines[yi + ry][xi + rx][0] = battr;
           lines[yi + ry][xi + rx][1] = '\u2524'; // '┤'
           // XXX If we alter iwidth and iright for no borders - nothing should be written here
           if (!self.border.right) {
@@ -270,7 +267,8 @@ Table.prototype.render = function() {
       // center
       if (ry === 0) {
         // top
-        lines[yi + ry][xi + ++rx][0] = battr;
+        rx++;
+        lines[yi + ry][xi + rx][0] = battr;
         lines[yi + ry][xi + rx][1] = '\u252c'; // '┬'
         // XXX If we alter iheight and itop for no borders - nothing should be written here
         if (!self.border.top) {
@@ -278,7 +276,8 @@ Table.prototype.render = function() {
         }
       } else if (ry / 2 === self.rows.length) {
         // bottom
-        lines[yi + ry][xi + ++rx][0] = battr;
+        rx++;
+        lines[yi + ry][xi + rx][0] = battr;
         lines[yi + ry][xi + rx][1] = '\u2534'; // '┴'
         // XXX If we alter iheight and ibottom for no borders - nothing should be written here
         if (!self.border.bottom) {
@@ -288,12 +287,14 @@ Table.prototype.render = function() {
         // middle
         if (self.options.fillCellBorders) {
           var lbg = (ry <= 2 ? hattr : cattr) & 0x1ff;
-          lines[yi + ry][xi + ++rx][0] = (battr & ~0x1ff) | lbg;
+          rx++;
+          lines[yi + ry][xi + rx][0] = (battr & ~0x1ff) | lbg;
         } else {
-          lines[yi + ry][xi + ++rx][0] = battr;
+          rx++;
+          lines[yi + ry][xi + rx][0] = battr;
         }
         lines[yi + ry][xi + rx][1] = '\u253c'; // '┼'
-        // ++rx;
+        // rx++;
       }
       lines[yi + ry].dirty = true;
     });
@@ -304,15 +305,17 @@ Table.prototype.render = function() {
   for (ry = 1; ry < self.rows.length * 2; ry++) {
     if (!lines[yi + ry]) break;
     rx = 0;
-    self._maxes.slice(0, -1).forEach(function(max, i) {
+    self._maxes.slice(0, -1).forEach(function(max) {
       rx += max;
       if (!lines[yi + ry][xi + rx + 1]) return;
       if (ry % 2 !== 0) {
         if (self.options.fillCellBorders) {
           var lbg = (ry <= 2 ? hattr : cattr) & 0x1ff;
-          lines[yi + ry][xi + ++rx][0] = (battr & ~0x1ff) | lbg;
+          rx++;
+          lines[yi + ry][xi + rx][0] = (battr & ~0x1ff) | lbg;
         } else {
-          lines[yi + ry][xi + ++rx][0] = battr;
+          rx++;
+          lines[yi + ry][xi + rx][0] = battr;
         }
         lines[yi + ry][xi + rx][1] = '\u2502'; // '│'
         lines[yi + ry].dirty = true;
@@ -321,7 +324,7 @@ Table.prototype.render = function() {
       }
     });
     rx = 1;
-    self._maxes.forEach(function(max, i) {
+    self._maxes.forEach(function(max) {
       while (max--) {
         if (ry % 2 === 0) {
           if (!lines[yi + ry]) break;
diff --git a/lib/widgets/terminal.js b/lib/widgets/terminal.js
index cf645e8..3ed1bbe 100644
--- a/lib/widgets/terminal.js
+++ b/lib/widgets/terminal.js
@@ -10,8 +10,6 @@
 
 var nextTick = global.setImmediate || process.nextTick.bind(process);
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 
@@ -20,8 +18,6 @@ var Box = require('./box');
  */
 
 function Terminal(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Terminal(options);
   }
@@ -77,7 +73,7 @@ Terminal.prototype.bootstrap = function() {
     get ownerDocument() { return element; },
     addEventListener: function() {},
     removeEventListener: function() {},
-    getElementsByTagName: function(name) { return [element]; },
+    getElementsByTagName: function() { return [element]; },
     getElementById: function() { return element; },
     parentNode: null,
     offsetParent: null,
@@ -348,7 +344,7 @@ Terminal.prototype._isMouse = function(buf) {
 };
 
 Terminal.prototype.setScroll =
-Terminal.prototype.scrollTo = function(offset, always) {
+Terminal.prototype.scrollTo = function(offset) {
   this.term.ydisp = offset;
   return this.emit('scroll');
 };
@@ -357,7 +353,7 @@ Terminal.prototype.getScroll = function() {
   return this.term.ydisp;
 };
 
-Terminal.prototype.scroll = function(offset, always) {
+Terminal.prototype.scroll = function(offset) {
   this.term.scrollDisp(offset);
   return this.emit('scroll');
 };
@@ -372,7 +368,7 @@ Terminal.prototype.getScrollHeight = function() {
   return this.term.rows - 1;
 };
 
-Terminal.prototype.getScrollPerc = function(s) {
+Terminal.prototype.getScrollPerc = function() {
   return (this.term.ydisp / this.term.ybase) * 100;
 };
 
diff --git a/lib/widgets/text.js b/lib/widgets/text.js
index 6020ebc..c3b44b2 100644
--- a/lib/widgets/text.js
+++ b/lib/widgets/text.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Element = require('./element');
 
diff --git a/lib/widgets/textarea.js b/lib/widgets/textarea.js
index 1acf79a..dc94609 100644
--- a/lib/widgets/textarea.js
+++ b/lib/widgets/textarea.js
@@ -12,8 +12,6 @@ var unicode = require('../unicode');
 
 var nextTick = global.setImmediate || process.nextTick.bind(process);
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Input = require('./input');
 
diff --git a/lib/widgets/textbox.js b/lib/widgets/textbox.js
index 425ff32..94545ee 100644
--- a/lib/widgets/textbox.js
+++ b/lib/widgets/textbox.js
@@ -8,8 +8,6 @@
  * Modules
  */
 
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Textarea = require('./textarea');
 
@@ -18,8 +16,6 @@ var Textarea = require('./textarea');
  */
 
 function Textbox(options) {
-  var self = this;
-
   if (!(this instanceof Node)) {
     return new Textbox(options);
   }
diff --git a/lib/widgets/video.js b/lib/widgets/video.js
index d0397d8..0fd365e 100644
--- a/lib/widgets/video.js
+++ b/lib/widgets/video.js
@@ -10,10 +10,6 @@
 
 var cp = require('child_process');
 
-var nextTick = global.setImmediate || process.nextTick.bind(process);
-
-var helpers = require('../helpers');
-
 var Node = require('./node');
 var Box = require('./box');
 var Terminal = require('./terminal');