From 1b5155cfae2a388925814b3b489618c26a663278 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Wed, 24 Jul 2013 14:17:52 -0500
Subject: [PATCH] refactor and clean up program.js.

---
 lib/program.js | 348 +++++++++++++++++++++----------------------------
 lib/widget.js  |   5 +-
 2 files changed, 153 insertions(+), 200 deletions(-)

diff --git a/lib/program.js b/lib/program.js
index 03442a9..6d9aafc 100644
--- a/lib/program.js
+++ b/lib/program.js
@@ -63,13 +63,6 @@ function Program(options) {
     || process.env.TERM
     || 'xterm';
 
-  // if (!Program.global) {
-  //   Program._write = process.stdout.write;
-  //   process.stdout.write = function() {};
-  //   process.stderr.write = function() {};
-  //   Program.global = this;
-  // }
-
   if (!Program.global) {
     Program.global = this;
   }
@@ -78,8 +71,6 @@ function Program(options) {
     this.setupTput();
   }
 
-  this.__flush = this._flush.bind(this);
-
   this.listen();
 }
 
@@ -116,7 +107,7 @@ Program.prototype.setupTput = function() {
       , cap = args.shift();
 
     if (tput[cap]) {
-      return this.write(tput[cap].apply(tput, args));
+      return this._write(tput[cap].apply(tput, args));
     }
   };
 
@@ -136,7 +127,7 @@ Program.prototype.setupTput = function() {
       };
     } else {
       self.put[key] = function() {
-        return self.write(tput[key].apply(tput, arguments));
+        return self._write(tput[key].apply(tput, arguments));
       };
     }
   });
@@ -209,9 +200,6 @@ Program.prototype.listen = function() {
     }
   });
 
-  // self.bindMouse();
-  // self.bindResponse();
-
   // Output
   this.output.on('resize', function() {
     self.cols = self.output.columns;
@@ -1071,17 +1059,17 @@ Program.prototype.receive = function(text, callback) {
     text = null;
   }
 
-  return process.nextTick(function() {
-    self.input.once('data', function(data) {
-      listeners.push.apply(listeners, bak);
-      if (typeof data !== 'string') {
-        data = data.toString('utf8');
-      }
-      return callback(null, data);
-    });
-
-    if (text) self.write(text);
+  this.input.once('data', function(data) {
+    listeners.push.apply(listeners, bak);
+    if (typeof data !== 'string') {
+      data = data.toString('utf8');
+    }
+    return callback(null, data);
   });
+
+  if (text != null) {
+    return this._write(text);
+  }
 };
 
 Program.prototype.response = function(name, text, callback) {
@@ -1097,14 +1085,18 @@ Program.prototype.response = function(name, text, callback) {
 
   this.bindResponse();
 
-  this.once('response' + (name ? ' ' + name : ''), function(event) {
+  name = name
+    ? 'response ' + name
+    : 'response';
+
+  this.once(name, function(event) {
     if (event.type === 'error') {
       return callback(new Error(event.event + ': ' + event.text));
     }
     return callback(null, event);
   });
 
-  return this.write(text);
+  return this._write(text);
 };
 
 Program.prototype._wrapCursor = function(nl) {
@@ -1164,33 +1156,9 @@ Program.prototype._parseChar = function(text, attr) {
   }
 };
 
-Program.prototype.echo_ =
-Program.prototype.write_ = function(text, attr) {
-  if (!text) return;
-
-  if (attr) {
-    text = this.text(text, attr);
-  }
-
-  if (this._buf) {
-    this._buf += text;
-    return true;
-  }
-
-  this._buf = text;
-
-  //if (!this.__flush) {
-  //  this.__flush = this._flush.bind(this);
-  //}
-
-  process.nextTick(this.__flush);
-
-  return true;
-};
-
-Program.prototype._flush = function() {
-  this.output.write(this._buf);
-  this._buf = '';
+Program.prototype._write = function(text) {
+  if (this.ret) return text;
+  return this.output.write(text);
 };
 
 Program.prototype.echo =
@@ -1272,7 +1240,7 @@ Program.prototype.rmove = function(x, y) {
 };
 
 Program.prototype.simpleInsert = function(ch, i, attr) {
-  return this.write(this.repeat(ch, i), attr);
+  return this._write(this.repeat(ch, i), attr);
 };
 
 Program.prototype.repeat = function(ch, i) {
@@ -1287,25 +1255,25 @@ Program.prototype.repeat = function(ch, i) {
 //Program.prototype.pad =
 Program.prototype.nul = function() {
   //if (this.has('pad')) return this.put.pad();
-  return this.write('\200');
+  return this._write('\200');
 };
 
 Program.prototype.bel =
 Program.prototype.bell = function() {
   if (this.has('bel')) return this.put.bel();
-  return this.write('\x07');
+  return this._write('\x07');
 };
 
 Program.prototype.vtab = function() {
   this.y++;
   this._ncoords();
-  return this.write('\x0b');
+  return this._write('\x0b');
 };
 
 Program.prototype.ff =
 Program.prototype.form = function() {
   if (this.has('ff')) return this.put.ff();
-  return this.write('\x0c');
+  return this._write('\x0c');
 };
 
 Program.prototype.kbs =
@@ -1313,7 +1281,7 @@ Program.prototype.backspace = function() {
   this.x--;
   this._ncoords();
   if (this.has('kbs')) return this.put.kbs();
-  return this.write('\x08');
+  return this._write('\x08');
 };
 
 Program.prototype.ht =
@@ -1321,24 +1289,24 @@ Program.prototype.tab = function() {
   this.x += 8;
   this._ncoords();
   if (this.has('ht')) return this.put.ht();
-  return this.write('\t');
+  return this._write('\t');
 };
 
 Program.prototype.shiftOut = function() {
   // if (this.has('S2')) return this.put.S2();
-  return this.write('\x0e');
+  return this._write('\x0e');
 };
 
 Program.prototype.shiftIn = function() {
   // if (this.has('S3')) return this.put.S3();
-  return this.write('\x0f');
+  return this._write('\x0f');
 };
 
 Program.prototype.cr =
 Program.prototype.return = function() {
   this.x = 0;
   if (this.has('cr')) return this.put.cr();
-  return this.write('\r');
+  return this._write('\r');
 };
 
 Program.prototype.nel =
@@ -1351,24 +1319,20 @@ Program.prototype.feed = function() {
   this.y++;
   this._ncoords();
   if (this.has('nel')) return this.put.nel();
-  return this.write('\n');
+  return this._write('\n');
 };
 
 /**
  * Esc
  */
 
-Program.prototype.esc = function(code) {
-  return this.write('\x1b' + code);
-};
-
 // ESC D Index (IND is 0x84).
 Program.prototype.ind =
 Program.prototype.index = function() {
   this.y++;
   this._ncoords();
   if (this.tput) return this.put.ind();
-  return this.write('\x1bD');
+  return this._write('\x1bD');
 };
 
 // ESC M Reverse Index (RI is 0x8d).
@@ -1378,7 +1342,7 @@ Program.prototype.reverseIndex = function() {
   this.y--;
   this._ncoords();
   if (this.tput) return this.put.ri();
-  return this.write('\x1bM');
+  return this._write('\x1bM');
 };
 
 // ESC E Next Line (NEL is 0x85).
@@ -1387,7 +1351,7 @@ Program.prototype.nextLine = function() {
   this.x = 0;
   this._ncoords();
   if (this.has('nel')) return this.put.nel();
-  return this.write('\x1bE');
+  return this._write('\x1bE');
 };
 
 // ESC c Full Reset (RIS).
@@ -1398,13 +1362,13 @@ Program.prototype.reset = function() {
       ? this.put.rs1()
       : this.put.ris();
   }
-  return this.write('\x1bc');
+  return this._write('\x1bc');
 };
 
 // ESC H Tab Set (HTS is 0x88).
 Program.prototype.tabSet = function() {
   if (this.tput) return this.put.hts();
-  return this.write('\x1bH');
+  return this._write('\x1bH');
 };
 
 // ESC 7 Save Cursor (DECSC).
@@ -1414,7 +1378,7 @@ Program.prototype.saveCursor = function(key) {
   this.savedX = this.x || 0;
   this.savedY = this.y || 0;
   if (this.tput) return this.put.sc();
-  return this.esc('7');
+  return this._write('\x1b7');
 };
 
 // ESC 8 Restore Cursor (DECRC).
@@ -1424,7 +1388,7 @@ Program.prototype.restoreCursor = function(key, hide) {
   this.x = this.savedX || 0;
   this.y = this.savedY || 0;
   if (this.tput) return this.put.rc();
-  return this.esc('8');
+  return this._write('\x1b8');
 };
 
 // Save Cursor Locally
@@ -1455,7 +1419,7 @@ Program.prototype.lrestoreCursor = function(key, hide) {
 
 // ESC # 3 DEC line height/width
 Program.prototype.lineHeight = function() {
-  return this.esc('#');
+  return this._write('\x1b#');
 };
 
 // ESC (,),*,+,-,. Designate G0-G2 Character Set.
@@ -1545,7 +1509,7 @@ Program.prototype.charset = function(val, level) {
       break;
   }
 
-  return this.write('\x1b(' + val);
+  return this._write('\x1b(' + val);
 };
 
 Program.prototype.enter_alt_charset_mode =
@@ -1594,17 +1558,13 @@ Program.prototype.setG = function(val) {
       val = 'O'; // Next Char Only
       break;
   }
-  return this.esc(val);
+  return this._write('\x1b' + val);
 };
 
 /**
  * OSC
  */
 
-Program.prototype.osc = function(code) {
-  return this.esc(']' + code);
-};
-
 // OSC Ps ; Pt ST
 // OSC Ps ; Pt BEL
 //   Set Text Parameters.
@@ -1612,11 +1572,11 @@ Program.prototype.setTitle = function(title) {
   if (this.term('screen')) {
     // Tmux pane
     // if (process.env.TMUX) {
-    //   return this.osc('2;' + title + '\x1b\\');
+    //   return this._write('\x1b]2;' + title + '\x1b\\');
     // }
-    return this.esc('k' + title + '\x1b\\');
+    return this._write('\x1bk' + title + '\x1b\\');
   }
-  return this.osc('0;' + title + '\x07');
+  return this._write('\x1b]0;' + title + '\x07');
 };
 
 // OSC Ps ; Pt ST
@@ -1626,7 +1586,7 @@ Program.prototype.resetColors = function(param) {
   if (this.has('Cr')) {
     return this.put.Cr(param);
   }
-  return this.osc('112;' + param + '\x07');
+  return this._write('\x1b]112;' + param + '\x07');
 };
 
 // OSC Ps ; Pt ST
@@ -1636,7 +1596,7 @@ Program.prototype.dynamicColors = function(param) {
   if (this.has('Cs')) {
     return this.put.Cs(param);
   }
-  return this.osc('12;' + param + '\x07');
+  return this._write('\x1b]12;' + param + '\x07');
 };
 
 // OSC Ps ; Pt ST
@@ -1646,17 +1606,13 @@ Program.prototype.selData = function(a, b) {
   if (this.has('Ms')) {
     return this.put.Ms(a, b);
   }
-  return this.osc('52;' + a + ';' + b + '\x07');
+  return this._write('\x1b]52;' + a + ';' + b + '\x07');
 };
 
 /**
  * CSI
  */
 
-Program.prototype.csi = function(code) {
-  return this.esc('[' + code);
-};
-
 // CSI Ps A
 // Cursor Up Ps Times (default = 1) (CUU).
 Program.prototype.cuu =
@@ -1665,7 +1621,7 @@ Program.prototype.cursorUp = function(param) {
   this.y -= param || 1;
   this._ncoords();
   if (this.tput) return this.put.cuu(param);
-  return this.write('\x1b[' + (param || '') + 'A');
+  return this._write('\x1b[' + (param || '') + 'A');
 };
 
 // CSI Ps B
@@ -1676,7 +1632,7 @@ Program.prototype.cursorDown = function(param) {
   this.y += param || 1;
   this._ncoords();
   if (this.tput) return this.put.cud(param);
-  return this.write('\x1b[' + (param || '') + 'B');
+  return this._write('\x1b[' + (param || '') + 'B');
 };
 
 // CSI Ps C
@@ -1688,7 +1644,7 @@ Program.prototype.cursorForward = function(param) {
   this.x += param || 1;
   this._ncoords();
   if (this.tput) return this.put.cuf(param);
-  return this.write('\x1b[' + (param || '') + 'C');
+  return this._write('\x1b[' + (param || '') + 'C');
 };
 
 // CSI Ps D
@@ -1700,7 +1656,7 @@ Program.prototype.cursorBackward = function(param) {
   this.x -= param || 1;
   this._ncoords();
   if (this.tput) return this.put.cub(param);
-  return this.write('\x1b[' + (param || '') + 'D');
+  return this._write('\x1b[' + (param || '') + 'D');
 };
 
 // CSI Ps ; Ps H
@@ -1719,7 +1675,7 @@ Program.prototype.cursorPos = function(row, col) {
   this.y = row;
   this._ncoords();
   if (this.tput) return this.put.cup(row, col);
-  return this.write('\x1b[' + (row + 1) + ';' + (col + 1) + 'H');
+  return this._write('\x1b[' + (row + 1) + ';' + (col + 1) + 'H');
 };
 
 // CSI Ps J  Erase in Display (ED).
@@ -1755,25 +1711,21 @@ Program.prototype.eraseInDisplay = function(param) {
   }
   switch (param) {
     case 'above':
-      this.write('\x1b[1J');
-      break;
+      return this._write('\X1b[1J');
     case 'all':
-      this.write('\x1b[2J');
-      break;
+      return this._write('\x1b[2J');
     case 'saved':
-      this.write('\x1b[3J');
-      break;
+      return this._write('\x1b[3J');
     case 'below':
     default:
-      this.write('\x1b[J');
-      break;
+      return this._write('\x1b[J');
   }
 };
 
 Program.prototype.clear = function() {
   this.x = this.y = 0;
   if (this.tput) return this.put.clear();
-  return this.write('\x1b[H\x1b[J');
+  return this._write('\x1b[H\x1b[J');
   // return this.ed('all');
 };
 
@@ -1806,15 +1758,12 @@ Program.prototype.eraseInLine = function(param) {
   }
   switch (param) {
     case 'left':
-      this.write('\x1b[1K');
-      break;
+      return this._write('\x1b[1K');
     case 'all':
-      this.write('\x1b[2K');
-      break;
+      return this._write('\x1b[2K');
     case 'right':
     default:
-      this.write('\x1b[K');
-      break;
+      return this._write('\x1b[K');
   }
 };
 
@@ -1883,7 +1832,7 @@ Program.prototype.eraseInLine = function(param) {
 Program.prototype.sgr =
 Program.prototype.attr =
 Program.prototype.charAttributes = function(param, val) {
-  return this.write(this._attr(param, val));
+  return this._write(this._attr(param, val));
 };
 
 Program.prototype.text = function(text, attr) {
@@ -2193,7 +2142,7 @@ Program.prototype.insertChars = function(param) {
   this.x += param || 1;
   this._ncoords();
   if (this.tput) return this.put.ich(param);
-  return this.write('\x1b[' + (param || 1) + '@');
+  return this._write('\x1b[' + (param || 1) + '@');
 };
 
 // CSI Ps E
@@ -2203,7 +2152,7 @@ Program.prototype.cnl =
 Program.prototype.cursorNextLine = function(param) {
   this.y += param || 1;
   this._ncoords();
-  return this.write('\x1b[' + (param || '') + 'E');
+  return this._write('\x1b[' + (param || '') + 'E');
 };
 
 // CSI Ps F
@@ -2213,7 +2162,7 @@ Program.prototype.cpl =
 Program.prototype.cursorPrecedingLine = function(param) {
   this.y -= param || 1;
   this._ncoords();
-  return this.write('\x1b[' + (param || '') + 'F');
+  return this._write('\x1b[' + (param || '') + 'F');
 };
 
 // CSI Ps G
@@ -2229,7 +2178,7 @@ Program.prototype.cursorCharAbsolute = function(param) {
   this.y = 0;
   this._ncoords();
   if (this.tput) return this.put.hpa(param);
-  return this.write('\x1b[' + (param + 1) + 'G');
+  return this._write('\x1b[' + (param + 1) + 'G');
 };
 
 // CSI Ps L
@@ -2237,7 +2186,7 @@ Program.prototype.cursorCharAbsolute = function(param) {
 Program.prototype.il =
 Program.prototype.insertLines = function(param) {
   if (this.tput) return this.put.il(param);
-  return this.write('\x1b[' + (param || '') + 'L');
+  return this._write('\x1b[' + (param || '') + 'L');
 };
 
 // CSI Ps M
@@ -2245,7 +2194,7 @@ Program.prototype.insertLines = function(param) {
 Program.prototype.dl =
 Program.prototype.deleteLines = function(param) {
   if (this.tput) return this.put.dl(param);
-  return this.write('\x1b[' + (param || '') + 'M');
+  return this._write('\x1b[' + (param || '') + 'M');
 };
 
 // CSI Ps P
@@ -2253,7 +2202,7 @@ Program.prototype.deleteLines = function(param) {
 Program.prototype.dch =
 Program.prototype.deleteChars = function(param) {
   if (this.tput) return this.put.dch(param);
-  return this.write('\x1b[' + (param || '') + 'P');
+  return this._write('\x1b[' + (param || '') + 'P');
 };
 
 // CSI Ps X
@@ -2261,7 +2210,7 @@ Program.prototype.deleteChars = function(param) {
 Program.prototype.ech =
 Program.prototype.eraseChars = function(param) {
   if (this.tput) return this.put.ech(param);
-  return this.write('\x1b[' + (param || '') + 'X');
+  return this._write('\x1b[' + (param || '') + 'X');
 };
 
 // CSI Pm `  Character Position Absolute
@@ -2274,7 +2223,7 @@ Program.prototype.charPosAbsolute = function(param) {
     return this.put.hpa.apply(this.put, arguments);
   }
   var param = slice.call(arguments).join(';');
-  return this.write('\x1b[' + (param || '') + '`');
+  return this._write('\x1b[' + (param || '') + '`');
 };
 
 // 141 61 a * HPR -
@@ -2287,7 +2236,7 @@ Program.prototype.HPositionRelative = function(param) {
   // Does not exist:
   // if (this.tput) return this.put.hpr(param);
   if (this.tput) return this.put.cuf(param);
-  return this.write('\x1b[' + (param || '') + 'a');
+  return this._write('\x1b[' + (param || '') + 'a');
 };
 
 // CSI Ps c  Send Device Attributes (Primary DA).
@@ -2342,7 +2291,7 @@ Program.prototype.linePosAbsolute = function(param) {
     return this.put.vpa.apply(this.put, arguments);
   }
   var param = slice.call(arguments).join(';');
-  return this.write('\x1b[' + (param || '') + 'd');
+  return this._write('\x1b[' + (param || '') + 'd');
 };
 
 // 145 65 e * VPR - Vertical Position Relative
@@ -2354,7 +2303,7 @@ Program.prototype.VPositionRelative = function(param) {
   // Does not exist:
   // if (this.tput) return this.put.vpr(param);
   if (this.tput) return this.put.cud(param);
-  return this.write('\x1b[' + (param || '') + 'e');
+  return this._write('\x1b[' + (param || '') + 'e');
 };
 
 // CSI Ps ; Ps f
@@ -2375,7 +2324,7 @@ Program.prototype.HVPosition = function(row, col) {
   // Does not exist (?):
   // if (this.tput) return this.put.hvp(row, col);
   if (this.tput) return this.put.cup(row, col);
-  return this.write('\x1b[' + (row + 1) + ';' + (col + 1) + 'f');
+  return this._write('\x1b[' + (row + 1) + ';' + (col + 1) + 'f');
 };
 
 // CSI Pm h  Set Mode (SM).
@@ -2465,7 +2414,7 @@ Program.prototype.HVPosition = function(row, col) {
 Program.prototype.sm =
 Program.prototype.setMode = function() {
   var param = slice.call(arguments).join(';');
-  return this.write('\x1b[' + (param || '') + 'h');
+  return this._write('\x1b[' + (param || '') + 'h');
 };
 
 Program.prototype.decset = function() {
@@ -2483,8 +2432,8 @@ Program.prototype.showCursor = function() {
   // cvvis starts blinking cursor
   if (this.tput) return this.put.cnorm();
   //if (this.tput) return this.put.cvvis();
-  // return this.write('\x1b[?12l\x1b[?25h'); // cursor_normal
-  // return this.write('\x1b[?12;25h'); // cursor_visible
+  // return this._write('\x1b[?12l\x1b[?25h'); // cursor_normal
+  // return this._write('\x1b[?12;25h'); // cursor_visible
   return this.setMode('?25');
 };
 
@@ -2580,7 +2529,7 @@ Program.prototype.alternateBuffer = function() {
 Program.prototype.rm =
 Program.prototype.resetMode = function() {
   var param = slice.call(arguments).join(';');
-  return this.write('\x1b[' + (param || '') + 'l');
+  return this._write('\x1b[' + (param || '') + 'l');
 };
 
 Program.prototype.decrst = function() {
@@ -2648,8 +2597,10 @@ Program.prototype.setMouse = function(opt, enable) {
 
   if (enable) {
     this._currentMouse = opt;
+    this.mouseEnabled = true;
   } else {
     delete this._currentMouse;
+    this.mouseEnabled = false;
   }
 
   // Make sure we're not a vtNNN
@@ -2748,7 +2699,7 @@ Program.prototype.setScrollRegion = function(top, bottom) {
   this.y = 0;
   this._ncoords();
   if (this.tput) return this.put.csr(top, bottom);
-  return this.write('\x1b[' + (top + 1) + ';' + (bottom + 1) + 'r');
+  return this._write('\x1b[' + (top + 1) + ';' + (bottom + 1) + 'r');
 };
 
 // CSI s
@@ -2758,7 +2709,7 @@ Program.prototype.saveCursorA = function() {
   this.savedX = this.x;
   this.savedY = this.y;
   if (this.tput) return this.put.sc();
-  return this.write('\x1b[s');
+  return this._write('\x1b[s');
 };
 
 // CSI u
@@ -2768,7 +2719,7 @@ Program.prototype.restoreCursorA = function() {
   this.x = this.savedX || 0;
   this.y = this.savedY || 0;
   if (this.tput) return this.put.rc();
-  return this.write('\x1b[u');
+  return this._write('\x1b[u');
 };
 
 /**
@@ -2782,7 +2733,7 @@ Program.prototype.cursorForwardTab = function(param) {
   this.x += 8;
   this._ncoords();
   if (this.tput) return this.put.tab(param);
-  return this.write('\x1b[' + (param || 1) + 'I');
+  return this._write('\x1b[' + (param || 1) + 'I');
 };
 
 // CSI Ps S  Scroll up Ps lines (default = 1) (SU).
@@ -2791,7 +2742,7 @@ Program.prototype.scrollUp = function(param) {
   this.y -= param || 1;
   this._ncoords();
   if (this.tput) return this.put.parm_index(param);
-  return this.write('\x1b[' + (param || 1) + 'S');
+  return this._write('\x1b[' + (param || 1) + 'S');
 };
 
 // CSI Ps T  Scroll down Ps lines (default = 1) (SD).
@@ -2800,7 +2751,7 @@ Program.prototype.scrollDown = function(param) {
   this.y += param || 1;
   this._ncoords();
   if (this.tput) return this.put.parm_rindex(param);
-  return this.write('\x1b[' + (param || 1) + 'T');
+  return this._write('\x1b[' + (param || 1) + 'T');
 };
 
 // CSI Ps ; Ps ; Ps ; Ps ; Ps T
@@ -2808,7 +2759,7 @@ Program.prototype.scrollDown = function(param) {
 //   [func;startx;starty;firstrow;lastrow].  See the section Mouse
 //   Tracking.
 Program.prototype.initMouseTracking = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + 'T');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + 'T');
 };
 
 // CSI > Ps; Ps T
@@ -2823,7 +2774,7 @@ Program.prototype.initMouseTracking = function() {
 //     Ps = 3  -> Do not query window/icon labels using UTF-8.
 //   (See discussion of "Title Modes").
 Program.prototype.resetTitleModes = function() {
-  return this.write('\x1b[>' + slice.call(arguments).join(';') + 'T');
+  return this._write('\x1b[>' + slice.call(arguments).join(';') + 'T');
 };
 
 // CSI Ps Z  Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).
@@ -2832,7 +2783,7 @@ Program.prototype.cursorBackwardTab = function(param) {
   this.x -= 8;
   this._ncoords();
   if (this.tput) return this.put.cbt(param);
-  return this.write('\x1b[' + (param || 1) + 'Z');
+  return this._write('\x1b[' + (param || 1) + 'Z');
 };
 
 // CSI Ps b  Repeat the preceding graphic character Ps times (REP).
@@ -2841,7 +2792,7 @@ Program.prototype.repeatPrecedingCharacter = function(param) {
   this.x += param || 1;
   this._ncoords();
   if (this.tput) return this.put.rep(param);
-  return this.write('\x1b[' + (param || 1) + 'b');
+  return this._write('\x1b[' + (param || 1) + 'b');
 };
 
 // CSI Ps g  Tab Clear (TBC).
@@ -2853,7 +2804,7 @@ Program.prototype.repeatPrecedingCharacter = function(param) {
 Program.prototype.tbc =
 Program.prototype.tabClear = function(param) {
   if (this.tput) return this.put.tbc(param);
-  return this.write('\x1b[' + (param || 0) + 'g');
+  return this._write('\x1b[' + (param || 0) + 'g');
 };
 
 // CSI Pm i  Media Copy (MC).
@@ -2869,7 +2820,7 @@ Program.prototype.tabClear = function(param) {
 //     Ps = 1  1  -> Print all pages.
 Program.prototype.mc =
 Program.prototype.mediaCopy = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + 'i');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + 'i');
 };
 
 Program.prototype.print_screen =
@@ -2913,7 +2864,7 @@ Program.prototype.mc5p = function() {
 //   If no parameters are given, all resources are reset to their
 //   initial values.
 Program.prototype.setResources = function() {
-  return this.write('\x1b[>' + slice.call(arguments).join(';') + 'm');
+  return this._write('\x1b[>' + slice.call(arguments).join(';') + 'm');
 };
 
 // CSI > Ps n
@@ -2930,7 +2881,7 @@ Program.prototype.setResources = function() {
 //   adding a parameter to each function key to denote the modi-
 //   fiers.
 Program.prototype.disableModifiers = function(param) {
-  return this.write('\x1b[>' + (param || '') + 'n');
+  return this._write('\x1b[>' + (param || '') + 'n');
 };
 
 // CSI > Ps p
@@ -2942,7 +2893,7 @@ Program.prototype.disableModifiers = function(param) {
 //     Ps = 2  -> always hide the pointer.  If no parameter is
 //     given, xterm uses the default, which is 1 .
 Program.prototype.setPointerMode = function(param) {
-  return this.write('\x1b[>' + (param || '') + 'p');
+  return this._write('\x1b[>' + (param || '') + 'p');
 };
 
 // CSI ! p   Soft terminal reset (DECSTR).
@@ -2953,9 +2904,9 @@ Program.prototype.softReset = function() {
   //if (this.tput) return this.put.init_2string();
   //if (this.tput) return this.put.reset_2string();
   if (this.tput) return this.put.rs2();
-  //return this.write('\x1b[!p');
-  //return this.write('\x1b[!p\x1b[?3;4l\x1b[4l\x1b>'); // init
-  return this.write('\x1b[!p\x1b[?3;4l\x1b[4l\x1b>'); // reset
+  //return this._write('\x1b[!p');
+  //return this._write('\x1b[!p\x1b[?3;4l\x1b[4l\x1b>'); // init
+  return this._write('\x1b[!p\x1b[?3;4l\x1b[4l\x1b>'); // reset
 };
 
 // CSI Ps$ p
@@ -2970,7 +2921,7 @@ Program.prototype.softReset = function() {
 //     4 - permanently reset
 Program.prototype.decrqm =
 Program.prototype.requestAnsiMode = function(param) {
-  return this.write('\x1b[' + (param || '') + '$p');
+  return this._write('\x1b[' + (param || '') + '$p');
 };
 
 // CSI ? Ps$ p
@@ -2980,7 +2931,7 @@ Program.prototype.requestAnsiMode = function(param) {
 //   as in the ANSI DECRQM.
 Program.prototype.decrqmp =
 Program.prototype.requestPrivateMode = function(param) {
-  return this.write('\x1b[?' + (param || '') + '$p');
+  return this._write('\x1b[?' + (param || '') + '$p');
 };
 
 // CSI Ps ; Ps " p
@@ -2995,7 +2946,7 @@ Program.prototype.requestPrivateMode = function(param) {
 //     Ps = 2  -> 8-bit controls.
 Program.prototype.decscl =
 Program.prototype.setConformanceLevel = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '"p');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '"p');
 };
 
 // CSI Ps q  Load LEDs (DECLL).
@@ -3008,7 +2959,7 @@ Program.prototype.setConformanceLevel = function() {
 //     Ps = 2  3  -> Extinguish Scroll Lock.
 Program.prototype.decll =
 Program.prototype.loadLEDs = function(param) {
-  return this.write('\x1b[' + (param || '') + 'q');
+  return this._write('\x1b[' + (param || '') + 'q');
 };
 
 // CSI Ps SP q
@@ -3048,7 +2999,7 @@ Program.prototype.setCursorStyle = function(param) {
   if (this.has('Ss')) {
     return this.put.Ss(param);
   }
-  return this.write('\x1b[' + (param || 1) + ' q');
+  return this._write('\x1b[' + (param || 1) + ' q');
 };
 
 // CSI Ps " q
@@ -3059,14 +3010,14 @@ Program.prototype.setCursorStyle = function(param) {
 //     Ps = 2  -> DECSED and DECSEL can erase.
 Program.prototype.decsca =
 Program.prototype.setCharProtectionAttr = function(param) {
-  return this.write('\x1b[' + (param || 0) + '"q');
+  return this._write('\x1b[' + (param || 0) + '"q');
 };
 
 // CSI ? Pm r
 //   Restore DEC Private Mode Values.  The value of Ps previously
 //   saved is restored.  Ps values are the same as for DECSET.
 Program.prototype.restorePrivateValues = function() {
-  return this.write('\x1b[?' + slice.call(arguments).join(';') + 'r');
+  return this._write('\x1b[?' + slice.call(arguments).join(';') + 'r');
 };
 
 // CSI Pt; Pl; Pb; Pr; Ps$ r
@@ -3076,14 +3027,14 @@ Program.prototype.restorePrivateValues = function() {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.deccara =
 Program.prototype.setAttrInRectangle = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '$r');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '$r');
 };
 
 // CSI ? Pm s
 //   Save DEC Private Mode Values.  Ps values are the same as for
 //   DECSET.
 Program.prototype.savePrivateValues = function(params) {
-  return this.write('\x1b[?' + slice.call(arguments).join(';') + 's');
+  return this._write('\x1b[?' + slice.call(arguments).join(';') + 's');
 };
 
 // CSI Ps ; Ps ; Ps t
@@ -3155,7 +3106,7 @@ Program.prototype.getWindowSize = function(callback) {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decrara =
 Program.prototype.reverseAttrInRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '$t');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '$t');
 };
 
 // CSI > Ps; Ps t
@@ -3167,7 +3118,7 @@ Program.prototype.reverseAttrInRectangle = function(params) {
 //     Ps = 3  -> Query window/icon labels using UTF-8.  (See dis-
 //     cussion of "Title Modes")
 Program.prototype.setTitleModeFeature = function(params) {
-  return this.write('\x1b[>' + slice.call(arguments).join(';') + 't');
+  return this._write('\x1b[>' + slice.call(arguments).join(';') + 't');
 };
 
 // CSI Ps SP t
@@ -3177,7 +3128,7 @@ Program.prototype.setTitleModeFeature = function(params) {
 //     Ps = 5 , 6 , 7 , or 8  -> high.
 Program.prototype.decswbv =
 Program.prototype.setWarningBellVolume = function(params) {
-  return this.write('\x1b[' + (param || '') + ' t');
+  return this._write('\x1b[' + (param || '') + ' t');
 };
 
 // CSI Ps SP u
@@ -3187,7 +3138,7 @@ Program.prototype.setWarningBellVolume = function(params) {
 //     Ps = 0 , 5 , 6 , 7 , or 8  -> high.
 Program.prototype.decsmbv =
 Program.prototype.setMarginBellVolume = function(params) {
-  return this.write('\x1b[' + (param || '') + ' u');
+  return this._write('\x1b[' + (param || '') + ' u');
 };
 
 // CSI Pt; Pl; Pb; Pr; Pp; Pt; Pl; Pp$ v
@@ -3199,7 +3150,7 @@ Program.prototype.setMarginBellVolume = function(params) {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.deccra =
 Program.prototype.copyRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '$v');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '$v');
 };
 
 // CSI Pt ; Pl ; Pb ; Pr ' w
@@ -3215,7 +3166,7 @@ Program.prototype.copyRectangle = function(params) {
 //   cels any prevous rectangle definition.
 Program.prototype.decefr =
 Program.prototype.enableFilterRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '\'w');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '\'w');
 };
 
 // CSI Ps x  Request Terminal Parameters (DECREQTPARM).
@@ -3231,7 +3182,7 @@ Program.prototype.enableFilterRectangle = function(params) {
 //     Pn = 0  <- STP flags.
 Program.prototype.decreqtparm =
 Program.prototype.requestParameters = function(params) {
-  return this.write('\x1b[' + (param || 0) + 'x');
+  return this._write('\x1b[' + (param || 0) + 'x');
 };
 
 // CSI Ps x  Select Attribute Change Extent (DECSACE).
@@ -3240,7 +3191,7 @@ Program.prototype.requestParameters = function(params) {
 //     Ps = 2  -> rectangle (exact).
 Program.prototype.decsace =
 Program.prototype.selectChangeExtent = function(params) {
-  return this.write('\x1b[' + (param || 0) + 'x');
+  return this._write('\x1b[' + (param || 0) + 'x');
 };
 
 // CSI Pc; Pt; Pl; Pb; Pr$ x
@@ -3250,7 +3201,7 @@ Program.prototype.selectChangeExtent = function(params) {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decfra =
 Program.prototype.fillRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '$x');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '$x');
 };
 
 // CSI Ps ; Pu ' z
@@ -3267,7 +3218,7 @@ Program.prototype.fillRectangle = function(params) {
 //     Pu = 2  <- character cells.
 Program.prototype.decelr =
 Program.prototype.enableLocatorReporting = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '\'z');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '\'z');
 };
 
 // CSI Pt; Pl; Pb; Pr$ z
@@ -3276,7 +3227,7 @@ Program.prototype.enableLocatorReporting = function(params) {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decera =
 Program.prototype.eraseRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '$z');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '$z');
 };
 
 // CSI Pm ' {
@@ -3292,7 +3243,7 @@ Program.prototype.eraseRectangle = function(params) {
 //     Ps = 4  -> do not report button up transitions.
 Program.prototype.decsle =
 Program.prototype.setLocatorEvents = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '\'{');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '\'{');
 };
 
 // CSI Pt; Pl; Pb; Pr$ {
@@ -3300,7 +3251,7 @@ Program.prototype.setLocatorEvents = function(params) {
 //     Pt; Pl; Pb; Pr denotes the rectangle.
 Program.prototype.decsera =
 Program.prototype.selectiveEraseRectangle = function(params) {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + '${');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + '${');
 };
 
 // CSI Ps ' |
@@ -3364,7 +3315,7 @@ Program.prototype.requestLocatorPosition = function(params, callback) {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decic =
 Program.prototype.insertColumns = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + ' }');
+  return this._write('\x1b[' + slice.call(arguments).join(';') + ' }');
 };
 
 // CSI P m SP ~
@@ -3372,60 +3323,61 @@ Program.prototype.insertColumns = function() {
 // NOTE: xterm doesn't enable this code by default.
 Program.prototype.decdc =
 Program.prototype.deleteColumns = function() {
-  return this.write('\x1b[' + slice.call(arguments).join(';') + ' ~');
-};
-
-/**
- * A workaround to output sequences without writing to a stream.
- */
-
-Program.prototype._owrite = function(data) {
-  this._odata = data;
+  return this._write('\x1b[' + slice.call(arguments).join(';') + ' ~');
 };
 
 Program.prototype.out = function(name) {
-  var args = slice.call(arguments, 1);
-  var write = this.write;
-  this.write = this._owrite;
-  var receive = this.receive;
-  this.receive = this._owrite;
-  this._odata = '';
-  this[name].apply(this, args);
-  this.write = write;
-  this.receive = receive;
-  return this._odata;
+  this.ret = true;
+  var out = this[name].apply(this, args);
+  this.ret = false;
+  return out;
 };
 
 Program.prototype.sigtstp = function(callback) {
+  var resume = this.pause();
+
+  process.once('SIGCONT', function() {
+    resume();
+    if (callback) callback();
+  });
+
+  process.kill(process.pid, 'SIGTSTP');
+};
+
+Program.prototype.pause = function(callback) {
   var self = this
     , isAlt = this.isAlt
-    , currentMouse = this._currentMouse;
+    , mouseEnabled = this.mouseEnabled;
 
-  this.lsaveCursor('sigtstp');
+  this.lsaveCursor('pause');
   //this.csr(0, screen.height - 1);
   if (isAlt) this.normalBuffer();
   this.showCursor();
-  if (currentMouse) this.disableMouse();
+  if (mouseEnabled) this.disableMouse();
 
   var write = this.output.write;
   this.output.write = function() {};
   this.input.setRawMode(false);
   this.input.pause();
 
-  process.once('SIGCONT', function() {
+  return this._resume = function() {
+    delete self._resume;
+
     self.input.setRawMode(true);
     self.input.resume();
     self.output.write = write;
 
     if (isAlt) self.alternateBuffer();
     //self.csr(0, screen.height - 1);
-    if (currentMouse) self.enableMouse();
-    self.lrestoreCursor('sigtstp', true);
+    if (mouseEnabled) self.enableMouse();
+    self.lrestoreCursor('pause', true);
 
     if (callback) callback();
-  });
+  };
+};
 
-  process.kill(process.pid, 'SIGTSTP');
+Program.prototype.resume = function(callback) {
+  if (this._resume) return this._resume();
 };
 
 /**
diff --git a/lib/widget.js b/lib/widget.js
index 8622443..823416f 100644
--- a/lib/widget.js
+++ b/lib/widget.js
@@ -288,6 +288,7 @@ function Screen(options) {
   this.program = options.program;
   this.program.zero = true;
   this.tput = this.program.tput;
+  this.output = this.program.output;
 
   this.dattr = ((0 << 18) | (0x1ff << 9)) | 0x1ff;
 
@@ -1398,7 +1399,7 @@ Screen.prototype.spawn = function(file, args, options) {
     , program = screen.program
     , options = options || {}
     , spawn = require('child_process').spawn
-    , mouse = program._currentMouse
+    , mouse = program.mouseEnabled
     , ps;
 
   options.stdio = 'inherit';
@@ -1555,7 +1556,7 @@ Screen.prototype.sigtstp = function(callback) {
   this.program.sigtstp(function() {
     self.alloc();
     self.render();
-    self.program.lrestoreCursor('sigtstp', true);
+    self.program.lrestoreCursor('pause', true);
     if (callback) callback();
   });
 };