From 8f936d00b72d038b5153734ffc0953a1b522662e Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Tue, 23 Jul 2013 00:37:13 -0500
Subject: [PATCH] tput.js refactor. rename variables.

---
 lib/tput.js | 65 +++++++++++++++++++++--------------------------------
 1 file changed, 25 insertions(+), 40 deletions(-)

diff --git a/lib/tput.js b/lib/tput.js
index e3aad48..6be45ee 100644
--- a/lib/tput.js
+++ b/lib/tput.js
@@ -526,8 +526,7 @@ Tput.prototype.compile = function(info) {
   ['bools', 'numbers', 'strings'].forEach(function(type) {
     Object.keys(info[type]).forEach(function(key) {
       info.all[key] = info[type][key];
-      self._debug('Compiling %s: %s', key, JSON.stringify(info.all[key]));
-      info.methods[key] = self._compile(info.all[key], key, info);
+      info.methods[key] = self._compile(info, key, info.all[key]);
     });
   });
 
@@ -594,7 +593,11 @@ Tput.prototype.inject = function(info) {
 // See:
 // ~/ncurses/ncurses/tinfo/lib_tparm.c
 // ~/ncurses/ncurses/tinfo/comp_scan.c
-Tput.prototype._compile = function(str, key, info) {
+Tput.prototype._compile = function(info, key, str) {
+  var self = this;
+
+  this._debug('Compiling %s: %s', key, JSON.stringify(str));
+
   switch (typeof str) {
     case 'boolean':
       return str;
@@ -629,30 +632,18 @@ Tput.prototype._compile = function(str, key, info) {
     , code = header
     , val = str
     , buff = ''
-    , cap;
-
-  var ch
-    , op
-    , i
-    , v
-
-  var fi
+    , cap
+    , ch
+    , fi
     , then
     , els
     , end;
 
-  function clear() {
-    if (buff) {
-      echo(JSON.stringify(buff).replace(/\\u00([0-9a-fA-F]{2})/g, '\\x$1'));
-      buff = '';
-    }
-  }
-
   function read(regex, no) {
     cap = regex.exec(val);
     if (!cap) return;
     val = val.substring(cap[0].length);
-    ch = op = i = v = cap[1];
+    ch = cap[1];
     if (!no) clear();
     return cap;
   }
@@ -681,12 +672,11 @@ Tput.prototype._compile = function(str, key, info) {
     buff += c;
   }
 
-  function push(c) {
-    expr('(stack.push(v = ' + c + '), v)');
-  }
-
-  function pop(c) {
-    expr((c ? c + ' = ' : '') + 'stack.pop()');
+  function clear() {
+    if (buff) {
+      echo(JSON.stringify(buff).replace(/\\u00([0-9a-fA-F]{2})/g, '\\x$1'));
+      buff = '';
+    }
   }
 
   while (val) {
@@ -818,28 +808,28 @@ Tput.prototype._compile = function(str, key, info) {
     // %p[1-9]
     //   push i'th parameter
     if (read(/^%p([1-9])/)) {
-      expr('(stack.push(v = params[' + (i - 1) + ']), v)');
+      expr('(stack.push(v = params[' + (ch - 1) + ']), v)');
       continue;
     }
 
     // %P[a-z]
     //   set dynamic variable [a-z] to pop()
     if (read(/^%P([a-z])/)) {
-      expr('dyn.' + v + ' = stack.pop()');
+      expr('dyn.' + ch + ' = stack.pop()');
       continue;
     }
 
     // %g[a-z]
     //   get dynamic variable [a-z] and push it
     if (read(/^%g([a-z])/)) {
-      expr('(stack.push(dyn.' + v + '), dyn.' + v + ')');
+      expr('(stack.push(dyn.' + ch + '), dyn.' + ch + ')');
       continue;
     }
 
     // %P[A-Z]
     //   set static variable [a-z] to pop()
     if (read(/^%P([A-Z])/)) {
-      expr('stat.' + v + ' = stack.pop()');
+      expr('stat.' + ch + ' = stack.pop()');
       continue;
     }
 
@@ -851,7 +841,7 @@ Tput.prototype._compile = function(str, key, info) {
     //   documented in other implementations.  Relying on it will adversely
     //   impact portability to other implementations.
     if (read(/^%g([A-Z])/)) {
-      expr('(stack.push(v = stat.' + v + '), v)');
+      expr('(stack.push(v = stat.' + ch + '), v)');
       continue;
     }
 
@@ -883,9 +873,9 @@ Tput.prototype._compile = function(str, key, info) {
     // %= %> %<
     //   logical operations: push(pop() op pop())
     if (read(/^%([+\-*\/m&|\^=><])/)) {
-      if (op === '=') op = '===';
-      else if (op === 'm') op = '%';
-      expr('(stack.push(v = (stack.pop() ' + op + ' stack.pop()) || 0), v)');
+      if (ch === '=') ch = '===';
+      else if (ch === 'm') ch = '%';
+      expr('(stack.push(v = (stack.pop() ' + ch + ' stack.pop()) || 0), v)');
       continue;
     }
 
@@ -894,7 +884,7 @@ Tput.prototype._compile = function(str, key, info) {
     if (read(/^%([AO])/)) {
       // Are we supposed to store the result on the stack?
       expr('(stack.push(v = (stack.pop() '
-        + (op === 'A' ? '&&' : '||')
+        + (ch === 'A' ? '&&' : '||')
         + ' stack.pop())), v)');
       continue;
     }
@@ -902,7 +892,7 @@ Tput.prototype._compile = function(str, key, info) {
     // %! %~
     //   unary operations (logical and bit complement): push(op pop())
     if (read(/^%([!~])/)) {
-      expr('(stack.push(v = ' + op + 'stack.pop()), v)');
+      expr('(stack.push(v = ' + ch + 'stack.pop()), v)');
       continue;
     }
 
@@ -926,10 +916,6 @@ Tput.prototype._compile = function(str, key, info) {
     //   It is possible to form else-if's a la Algol 68:
     //     %? c1 %t b1 %e c2 %t b2 %e c3 %t b3 %e c4 %t b4 %e %;
     //   where ci are conditions, bi are bodies.
-    //   Use the -f option of tic or infocmp to see the structure of
-    //   if-then-else's.  Some strings, e.g., sgr can be very complicated when
-    //   written on one line.  The -f option splits the string into lines with
-    //   the parts indented.
     if (read(/^%\?/)) {
       end = -1;
       stmt(';if (');
@@ -949,7 +935,6 @@ Tput.prototype._compile = function(str, key, info) {
       continue;
     }
 
-    // if/then/else/end
     // Terminfo does elseif's like
     // this: %?[expr]%t...%e[expr]%t...%;
     if (read(/^%e/)) {