Issue #341: Fixed reverse video rendering

* Added new CSS class for handling reverse video with default terminal
  colors. For colors given with value 0-255 background and foreground
  values are just switched.
* New CSS classes were also added to Black On White and White On Black
  color themes.

shellinabox/black-on-white.css

@@ -0,0 +1,16 @@
+#vt100 .ansiDefR {
+  color:            #ffffff;
+}
+
+#vt100 .bgAnsiDefR {
+  background-color: #000000;
+}
+
+#vt100 #scrollable.inverted .ansiDefR {
+  color:            #000000;
+}
+
+#vt100 #scrollable.inverted .bgAnsiDefR {
+  background-color: #ffffff;
+}
+

shellinabox/color.css

@@ -2,6 +2,7 @@
 
 /* SYSTEM colors */
 #vt100 .ansiDef   {                            }
+#vt100 .ansiDefR  {                            }
 
 #vt100 .ansi0     { color:            #000000; }
 #vt100 .ansi1     { color:            #cd0000; }
@@ -264,6 +265,7 @@
 
 /* SYSTEM colors */
 #vt100 .bgAnsiDef {                            }
+#vt100 .bgAnsiDefR {                            }
 
 #vt100 .bgAnsi0   { background-color: #000000; }
 #vt100 .bgAnsi1   { background-color: #cd0000; }

shellinabox/styles.css

@@ -243,9 +243,12 @@
 [else DEFINES_COLORS]
 /* SYSTEM colors */
 #vt100 .ansiDef   { color:            #000000; }
+#vt100 .ansiDefR  { color:            #ffffff; }
 
 #vt100 #scrollable.inverted .ansiDef
                   { color:            #ffffff; }
+#vt100 #scrollable.inverted .ansiDefR
+                  { color:            #000000; }
 
 #vt100 .ansi0     { color:            #000000; }
 #vt100 .ansi1     { color:            #cd0000; }
@@ -508,9 +511,13 @@
 
 /* SYSTEM colors */
 #vt100 .bgAnsiDef { background-color: #ffffff; }
+#vt100 .bgAnsiDefR
+                  { background-color: #000000; }
 
 #vt100 #scrollable.inverted .bgAnsiDef
                   { background-color: #000000; }
+#vt100 #scrollable.inverted .bgAnsiDefR
+                  { background-color: #ffffff; }
 
 #vt100 .bgAnsi0   { background-color: #000000; }
 #vt100 .bgAnsi1   { background-color: #cd0000; }

shellinabox/vt100.jspp

@@ -3351,44 +3351,50 @@ VT100.prototype.respondSecondaryDA = function() {
 
 
 VT100.prototype.updateStyle = function() {
-  this.style   = '';
+  var fg          = '';
+  var bg          = '';
+  this.style      = '';
+
   if (this.attr & ATTR_UNDERLINE) {
-    this.style = 'text-decoration: underline;';
-  }
-  var bg       = (this.attr >> 4) & 0xF;
-  var fg       =  this.attr       & 0xF;
-  if (this.attr & ATTR_REVERSE) {
-    var tmp    = bg;
-    bg         = fg;
-    fg         = tmp;
-  }
-  if ((this.attr & (ATTR_REVERSE | ATTR_DIM)) == ATTR_DIM) {
-    fg         = 8; // Dark grey
-  } else if (this.attr & ATTR_BRIGHT) {
-    fg        |= 8;
-    this.style = 'font-weight: bold;';
+    this.style   += 'text-decoration: underline;';
   }
   if (this.attr & ATTR_BLINK) {
-    this.style = 'text-decoration: blink;';
+    this.style   += 'text-decoration: blink;';
   }
 
-  // Default colors
-  if (this.attr & ATTR_DEF_FG) {
-    fg         = 'Def';
-  }
-  if (this.attr & ATTR_DEF_BG) {
-    bg         = 'Def';
-  }
-
-  // Extended color mode support (256 colors).
+  // Forground color
   if (this.attrFg) {
-    fg         = this.attrFg;
-  }
-  if (this.attrBg) {
-    bg         = this.attrBg;
+    // 256 color mode
+    fg            = this.attrFg
+  } else if (this.attr & ATTR_DEF_FG) {
+    fg            = 'Def';
+  } else {
+    fg            = this.attr & 0xF;
+    if (this.attr & ATTR_BRIGHT) {
+      fg         |= 8;
+      this.style += 'font-weight: bold;';
+    }
   }
 
-  this.color   = 'ansi' + fg + ' bgAnsi' + bg;
+  // Background color
+  if (this.attrBg) {
+    // 256 color mode
+    bg            = this.attrBg
+  } else if (this.attr & ATTR_DEF_BG) {
+    bg            = 'Def';
+  } else {
+    bg            = (this.attr >> 4) & 0xF;
+  }
+
+  // Reverse colors
+  if (this.attr & ATTR_REVERSE) {
+    var tmpFg     = fg;
+    var tmpBg     = bg;
+    fg            = (tmpBg == 'Def') ? 'DefR' : tmpBg;
+    bg            = (tmpFg == 'Def') ? 'DefR' : tmpFg;
+  }
+
+  this.color      = 'ansi' + fg + ' bgAnsi' + bg;
 };
 
 VT100.prototype.setAttrColors = function(attr) {

shellinabox/white-on-black.css

@@ -24,14 +24,30 @@
   color:            #ffffff;
 }
 
+#vt100 .ansiDefR {
+  color:            #000000;
+}
+
 #vt100 .bgAnsiDef {
   background-color: #000000;
 }
 
+#vt100 .bgAnsiDefR {
+  background-color: #ffffff;
+}
+
 #vt100 #scrollable.inverted .ansiDef {
   color:            #000000;
 }
 
+#vt100 #scrollable.inverted .ansiDefR {
+  color:            #ffffff;
+}
+
 #vt100 #scrollable.inverted .bgAnsiDef {
   background-color: #ffffff;
 }
+
+#vt100 #scrollable.inverted .bgAnsiDefR {
+  background-color: #000000;
+}