Change Framebuffer's containers/methods to improve performance.

* Reduce the size of Terminal::Cell.
* Change colors and attributes in Terminal::Rendition to bitfields/bitmask.
* Change Cells to use UTF-8 strings instead of vector<wchar_t>.  Store Rows in a vector instead of a deque.
* Add various Framebuffer::append() methods for more efficient passing of single and repeated characters.
* Change title/icon strings from deques to a vector typedef-- this is more for tidiness than any real performance.

src/frontend/terminaloverlay.cc

@@ -61,15 +61,15 @@ void ConditionalOverlayCell::apply( Framebuffer &fb, uint64_t confirmed_epoch, i
 
   if ( unknown ) {
     if ( flag && ( col != fb.ds.get_width() - 1 ) ) {
-      fb.get_mutable_cell( row, col )->renditions.underlined = true;
+      fb.get_mutable_cell( row, col )->renditions.set_attribute(Renditions::underlined, true);
     }
     return;
   }
 
-  if ( !(*(fb.get_cell( row, col )) == replacement) ) {
+  if ( *fb.get_cell( row, col ) != replacement ) {
     *(fb.get_mutable_cell( row, col )) = replacement;
     if ( flag ) {
-      fb.get_mutable_cell( row, col )->renditions.underlined = true;
+      fb.get_mutable_cell( row, col )->renditions.set_attribute( Renditions::underlined, true );
     }
   }
 }
@@ -275,7 +275,7 @@ void NotificationEngine::apply( Framebuffer &fb ) const
     case 2: /* wide character */
       this_cell = fb.get_mutable_cell( 0, overlay_col );
       fb.reset_cell( this_cell );
-      this_cell->renditions.bold = true;
+      this_cell->renditions.set_attribute(Renditions::bold, true);
       this_cell->renditions.foreground_color = 37;
       this_cell->renditions.background_color = 44;
       
@@ -296,7 +296,7 @@ void NotificationEngine::apply( Framebuffer &fb ) const
 	overlay_col++;
       }
 
-      if ( combining_cell->contents.size() < 16 ) {
+      if ( combining_cell->contents.size() < 32 ) {
 	combining_cell->contents.push_back( ch );
       }
       break;
@@ -345,9 +345,9 @@ void OverlayManager::apply( Framebuffer &fb )
   title.apply( fb );
 }
 
-void TitleEngine::set_prefix( const wstring s )
+void TitleEngine::set_prefix( const wstring &s )
 {
-  prefix = deque<wchar_t>( s.begin(), s.end() );
+  prefix = Terminal::Framebuffer::title_type( s.begin(), s.end() );
 }
 
 void ConditionalOverlayRow::apply( Framebuffer &fb, uint64_t confirmed_epoch, bool flag ) const

src/frontend/terminaloverlay.h

@@ -310,12 +310,12 @@ namespace Overlay {
 
   class TitleEngine {
   private:
-    deque<wchar_t> prefix;
+    Terminal::Framebuffer::title_type prefix;
 
   public:
     void apply( Framebuffer &fb ) const { fb.prefix_window_title( prefix ); }
-    void set_prefix( const wstring s );
     TitleEngine() : prefix() {}
+    void set_prefix( const wstring &s );
   };
 
   /* the overlay manager */
@@ -331,7 +331,7 @@ namespace Overlay {
     NotificationEngine & get_notification_engine( void ) { return notifications; }
     PredictionEngine & get_prediction_engine( void ) { return predictions; }
 
-    void set_title_prefix( const wstring s ) { title.set_prefix( s ); }
+    void set_title_prefix( const wstring &s ) { title.set_prefix( s ); }
 
     OverlayManager() : notifications(), predictions(), title() {}
 

src/terminal/parser.cc

@@ -85,8 +85,7 @@ void Parser::UTF8Parser::input( char c, Actions &ret )
   /* This function will only work in a UTF-8 locale. */
 
   wchar_t pwc;
-  mbstate_t ps;
-  memset( &ps, 0, sizeof( ps ) );
+  mbstate_t ps = mbstate_t();
 
   size_t total_bytes_parsed = 0;
   size_t orig_buf_len = buf_len;

src/terminal/terminal.cc

@@ -97,7 +97,7 @@ void Emulator::print( const Parser::Print *act )
     this_cell = fb.get_mutable_cell();
 
     fb.reset_cell( this_cell );
-    this_cell->contents.push_back( act->ch );
+    this_cell->append( act->ch );
     this_cell->width = chwidth;
     fb.apply_renditions_to_current_cell();
 
@@ -127,8 +127,7 @@ void Emulator::print( const Parser::Print *act )
       combining_cell->fallback = true;
       fb.ds.move_col( 1, true, true );
     }
-
-    if ( combining_cell->contents.size() < 16 ) {
+    if ( combining_cell->contents.size() < 32 ) {
       /* seems like a reasonable limit on combining characters */
       combining_cell->contents.push_back( act->ch );
     }

src/terminal/terminaldisplay.cc

@@ -33,6 +33,7 @@
 #include <stdio.h>
 
 #include "terminaldisplay.h"
+#include "terminalframebuffer.h"
 
 using namespace Terminal;
 
@@ -65,7 +66,7 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
 
   /* has bell been rung? */
   if ( f.get_bell_count() != frame.last_frame.get_bell_count() ) {
-    frame.append( "\x07" );
+    frame.append( '\007' );
   }
 
   /* has icon name or window title changed? */
@@ -73,40 +74,38 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
        ( (!initialized)
          || (f.get_icon_name() != frame.last_frame.get_icon_name())
          || (f.get_window_title() != frame.last_frame.get_window_title()) ) ) {
+    typedef Terminal::Framebuffer::title_type title_type;
       /* set icon name and window title */
     if ( f.get_icon_name() == f.get_window_title() ) {
       /* write combined Icon Name and Window Title */
       frame.append( "\033]0;" );
-      const std::deque<wchar_t> &window_title( f.get_window_title() );
-      for ( std::deque<wchar_t>::const_iterator i = window_title.begin();
+      const title_type &window_title( f.get_window_title() );
+      for ( title_type::const_iterator i = window_title.begin();
             i != window_title.end();
             i++ ) {
-	snprintf( tmp, 64, "%lc", (wint_t)*i );
-	frame.append( tmp );
+	frame.append( *i );
       }
-      frame.append( "\007" );
+      frame.append( '\007' );
       /* ST is more correct, but BEL more widely supported */
     } else {
       /* write Icon Name */
       frame.append( "\033]1;" );
-      const std::deque<wchar_t> &icon_name( f.get_icon_name() );
-      for ( std::deque<wchar_t>::const_iterator i = icon_name.begin();
+      const title_type &icon_name( f.get_icon_name() );
+      for ( title_type::const_iterator i = icon_name.begin();
 	    i != icon_name.end();
 	    i++ ) {
-	snprintf( tmp, 64, "%lc", (wint_t)*i );
-	frame.append( tmp );
+	frame.append( *i );
       }
-      frame.append( "\007" );
+      frame.append( '\007' );
 
       frame.append( "\033]2;" );
-      const std::deque<wchar_t> &window_title( f.get_window_title() );
-      for ( std::deque<wchar_t>::const_iterator i = window_title.begin();
+      const title_type &window_title( f.get_window_title() );
+      for ( title_type::const_iterator i = window_title.begin();
 	    i != window_title.end();
 	    i++ ) {
-	snprintf( tmp, 64, "%lc", (wint_t)*i );
-	frame.append( tmp );
+	frame.append( *i );
       }
-      frame.append( "\007" );
+      frame.append( '\007' );
     }
 
   }
@@ -192,7 +191,7 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
 
 	/* scroll */
 	for ( int i = 0; i < lines_scrolled; i++ ) {
-	  frame.append( "\n" );
+	  frame.append( '\n' );
 	}
 
 	/* do the move in memory */
@@ -285,7 +284,7 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
   /* have renditions changed? */
   if ( (!initialized)
        || !(f.ds.get_renditions() == frame.current_rendition) ) {
-    frame.appendstring( f.ds.get_renditions().sgr() );
+    frame.append( f.ds.get_renditions().sgr() );
     frame.current_rendition = f.ds.get_renditions();
   }
 
@@ -359,7 +358,7 @@ void Display::put_cell( bool initialized, FrameState &frame, const Framebuffer &
 
   if ( !(frame.current_rendition == cell->renditions) ) {
     /* print renditions */
-    frame.appendstring( cell->renditions.sgr() );
+    frame.append( cell->renditions.sgr() );
     frame.current_rendition = cell->renditions;
   }
 
@@ -381,7 +380,7 @@ void Display::put_cell( bool initialized, FrameState &frame, const Framebuffer &
     bool can_use_erase = has_bce || (cell->renditions == initial_rendition());
 
     if ( frame.force_next_put ) {
-      frame.append( " " );
+      frame.append( ' ' );
       frame.cursor_x++;
       frame.x++;
       frame.force_next_put = false;
@@ -404,7 +403,7 @@ void Display::put_cell( bool initialized, FrameState &frame, const Framebuffer &
 	frame.x += clear_count;
       } else { /* no ECH, so just print a space */
 	/* unlike erases, this will use background color irrespective of BCE */
-	frame.append( " " );
+	frame.append( ' ' );
 	frame.cursor_x++;
 	frame.x++;
       }
@@ -418,12 +417,7 @@ void Display::put_cell( bool initialized, FrameState &frame, const Framebuffer &
     frame.append( "\xC2\xA0" );
   }
 
-  for ( std::vector<wchar_t>::const_iterator i = cell->contents.begin();
-	i != cell->contents.end();
-	i++ ) {
-    snprintf( tmp, 64, "%lc", (wint_t)*i );
-    frame.append( tmp );
-  }
+  frame.append( cell->contents );
 
   frame.x += cell->width;
   frame.cursor_x += cell->width;
@@ -446,3 +440,13 @@ void FrameState::append_silent_move( int y, int x )
   cursor_x = x;
   cursor_y = y;
 }
+
+FrameState::FrameState( const Framebuffer &s_last )
+      : x(0), y(0),
+	force_next_put( false ),
+        str(), cursor_x(0), cursor_y(0), current_rendition( 0 ),
+	last_frame( s_last )
+{
+  /* just a guess-- doesn't matter for correctness */
+  str.reserve( last_frame.ds.get_width() * last_frame.ds.get_height() * 4 );
+}

src/terminal/terminaldisplay.h

@@ -48,17 +48,13 @@ namespace Terminal {
 
     Framebuffer last_frame;
 
-    FrameState( const Framebuffer &s_last )
-      : x(0), y(0),
-	force_next_put( false ),
-	str(), cursor_x(0), cursor_y(0), current_rendition( 0 ),
-	last_frame( s_last )
-    {
-      str.reserve( 1024 );
-    }
+    FrameState( const Framebuffer &s_last );
 
+    void append( const char c ) { str.append( 1, c ); }
+    void append( const wchar_t wc ) { Cell::append_to_str( str, wc ); }
     void append( const char * s ) { str.append( s ); }
-    void appendstring( const std::string &s ) { str.append( s ); }
+    void append( const Cell::content_type &contents ) { str.append( contents.begin(), contents.end() ); }
+    void append_string( const std::string &append ) { str.append(append); }
 
     void append_silent_move( int y, int x );
   };

src/terminal/terminaldisplayinit.cc

@@ -90,7 +90,7 @@ const char *Display::ti_str( const char *capname )
 }
 
 Display::Display( bool use_environment )
-  : has_ech( true ), has_bce( true ), has_title( true ), posterize_colors( false ), smcup( NULL ), rmcup( NULL )
+  : has_ech( true ), has_bce( true ), has_title( true ), posterize_colors( 0 ), smcup( NULL ), rmcup( NULL )
 {
   if ( use_environment ) {
     int errret = -2;

src/terminal/terminalframebuffer.cc

@@ -32,17 +32,37 @@
 
 #include <assert.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "terminalframebuffer.h"
 
 using namespace Terminal;
 
-void Cell::reset( int background_color )
+Cell::Cell( color_type background_color )
+  : contents(),
+    renditions( background_color ),
+    width( 1 ),
+    fallback( false ),
+    wrap( false )
+{}
+#if 0
+Cell::Cell() /* default constructor required by C++11 STL */
+  : contents(),
+    renditions( 0 ),
+    width( 1 ),
+    fallback( false ),
+    wrap( false )
+{
+  assert( false );
+}
+#endif
+
+void Cell::reset( color_type background_color )
 {
   contents.clear();
-  fallback = false;
-  width = 1;
   renditions = Renditions( background_color );
+  width = 1;
+  fallback = false;
   wrap = false;
 }
 
@@ -310,13 +330,25 @@ void Framebuffer::delete_line( int row, int count )
   }
 }
 
-void Row::insert_cell( int col, int background_color )
+Row::Row( size_t s_width, color_type background_color )
+  : cells( s_width, Cell( background_color ) )
+{}
+
+#if 0
+Row::Row() /* default constructor required by C++11 STL */
+  : cells( 1, Cell() )
+{
+  assert( false );
+}
+#endif
+
+void Row::insert_cell( int col, color_type background_color )
 {
   cells.insert( cells.begin() + col, Cell( background_color ) );
   cells.pop_back();
 }
 
-void Row::delete_cell( int col, int background_color )
+void Row::delete_cell( int col, color_type background_color )
 {
   cells.push_back( Cell( background_color ) );
   cells.erase( cells.begin() + col );
@@ -336,7 +368,7 @@ void Framebuffer::reset( void )
 {
   int width = ds.get_width(), height = ds.get_height();
   ds = DrawState( width, height );
-  rows = std::deque<Row>( height, newrow() );
+  rows = rows_type( height, newrow() );
   window_title.clear();
   /* do not reset bell_count */
 }
@@ -412,17 +444,16 @@ void DrawState::resize( int s_width, int s_height )
   }
 }
 
-Renditions::Renditions( int s_background )
-  : bold( false ), italic( false ), underlined( false ), blink( false ),
-    inverse( false ), invisible( false ), foreground_color( 0 ),
-    background_color( s_background )
+Renditions::Renditions( color_type s_background )
+  : foreground_color( 0 ), background_color( s_background ),
+    attributes( 0 )
 {}
 
 /* This routine cannot be used to set a color beyond the 16-color set. */
-void Renditions::set_rendition( int num )
+void Renditions::set_rendition( color_type num )
 {
   if ( num == 0 ) {
-    bold = italic = underlined = blink = inverse = invisible = false;
+    clear_attributes();
     foreground_color = background_color = 0;
     return;
   }
@@ -449,13 +480,14 @@ void Renditions::set_rendition( int num )
     return;
   }
 
+  bool value = num < 9;
   switch ( num ) {
-  case 1: case 22: bold = (num == 1); break;
-  case 3: case 23: italic = (num == 3); break;
-  case 4: case 24: underlined = (num == 4); break;
-  case 5: case 25: blink = (num == 5); break;
-  case 7: case 27: inverse = (num == 7); break;
-  case 8: case 28: invisible = (num == 8); break;
+  case 1: case 22: set_attribute(bold, value); break;
+  case 3: case 23: set_attribute(italic, value); break;
+  case 4: case 24: set_attribute(underlined, value); break;
+  case 5: case 25: set_attribute(blink, value); break;
+  case 7: case 27: set_attribute(inverse, value); break;
+  case 8: case 28: set_attribute(invisible, value); break;
   }
 }
 
@@ -478,12 +510,12 @@ std::string Renditions::sgr( void ) const
   std::string ret;
 
   ret.append( "\033[0" );
-  if ( bold ) ret.append( ";1" );
-  if ( italic ) ret.append( ";3" );
-  if ( underlined ) ret.append( ";4" );
-  if ( blink ) ret.append( ";5" );
-  if ( inverse ) ret.append( ";7" );
-  if ( invisible ) ret.append( ";8" );
+  if ( get_attribute( bold ) ) ret.append( ";1" );
+  if ( get_attribute( italic ) ) ret.append( ";3" );
+  if ( get_attribute( underlined ) ) ret.append( ";4" );
+  if ( get_attribute( blink ) ) ret.append( ";5" );
+  if ( get_attribute( inverse ) ) ret.append( ";7" );
+  if ( get_attribute( invisible ) ) ret.append( ";8" );
 
   if ( foreground_color
        && (foreground_color <= 37) ) {
@@ -570,7 +602,7 @@ void Renditions::posterize( void )
   }
 }
 
-void Row::reset( int background_color )
+void Row::reset( color_type background_color )
 {
   for ( cells_type::iterator i = cells.begin();
 	i != cells.end();
@@ -579,22 +611,13 @@ void Row::reset( int background_color )
   }
 }
 
-void Framebuffer::prefix_window_title( const std::deque<wchar_t> &s )
+void Framebuffer::prefix_window_title( const title_type &s )
 {
   if ( icon_name == window_title ) {
     /* preserve equivalence */
-    for ( std::deque<wchar_t>::const_reverse_iterator i = s.rbegin();
-          i != s.rend();
-          i++ ) {
-      icon_name.push_front( *i );
-    }
-  }
-
-  for ( std::deque<wchar_t>::const_reverse_iterator i = s.rbegin();
-        i != s.rend();
-        i++ ) {
-    window_title.push_front( *i );
+    icon_name.insert(icon_name.begin(), s.begin(), s.end() );
   }
+  window_title.insert(window_title.begin(), s.begin(), s.end() );
 }
 
 wint_t Cell::debug_contents( void ) const
@@ -602,7 +625,11 @@ wint_t Cell::debug_contents( void ) const
   if ( contents.empty() ) {
     return '_';
   } else {
-    return contents.front();
+    /* very, very cheesy */
+    wchar_t ch[2];
+    const std::string chars( contents.begin(), contents.end() );
+    mbstowcs(ch, chars.c_str(), 1);
+    return ch[0];
   }
 }
 

src/terminal/terminalframebuffer.h

@@ -33,65 +33,68 @@
 #ifndef TERMINALFB_HPP
 #define TERMINALFB_HPP
 
+#include <assert.h>
+#include <limits.h>
+#include <stdint.h>
+
 #include <vector>
 #include <deque>
 #include <string>
 #include <list>
-#include <assert.h>
 
 /* Terminal framebuffer */
 
 namespace Terminal {
+  typedef uint16_t color_type;
+
   class Renditions {
   public:
-    bool bold, italic, underlined, blink, inverse, invisible;
-    int foreground_color;
-    int background_color;
+    typedef enum { bold, faint, italic, underlined, blink, inverse, invisible, SIZE } attribute_type;
 
-    Renditions( int s_background );
+    // all together, a 32 bit word now...
+    unsigned int foreground_color : 12;
+    unsigned int background_color : 12;
+  private:
+    unsigned int attributes : 8;
+
+  public:
+    Renditions( color_type s_background );
     void set_foreground_color( int num );
     void set_background_color( int num );
-    void set_rendition( int num );
+    void set_rendition( color_type num );
     std::string sgr( void ) const;
 
     void posterize( void );
 
     bool operator==( const Renditions &x ) const
     {
-      return (bold == x.bold) && (italic == x.italic) && (underlined == x.underlined)
-	&& (blink == x.blink) && (inverse == x.inverse)
-	&& (invisible == x.invisible) && (foreground_color == x.foreground_color)
+      return ( attributes == x.attributes )
+        && ( foreground_color == x.foreground_color )
         && ( background_color == x.background_color );
     }
+    void set_attribute( attribute_type attr, bool val )
+    {
+      attributes = val ?
+	( attributes | (1 << attr) ) :
+	( attributes & ~(1 << attr) );
+    }
+    bool get_attribute( attribute_type attr ) const { return attributes & ( 1 << attr ); }
+    void clear_attributes() { attributes = 0; }
   };
 
   class Cell {
   public:
-    std::vector<wchar_t> contents;
-    char fallback; /* first character is combining character */
-    int width;
+    typedef std::string content_type; /* can be std::string, std::vector<uint8_t>, or __gnu_cxx::__vstring */
+    content_type contents;
     Renditions renditions;
+    uint8_t width;
+    bool fallback; /* first character is combining character */
     bool wrap; /* if last cell, wrap to next line */
 
-    Cell( int background_color )
-      : contents(),
-	fallback( false ),
-	width( 1 ),
-	renditions( background_color ),
-	wrap( false )
-    {}
+    Cell( color_type background_color );
+    Cell(); /* default constructor required by C++11 STL */
 
-    Cell() /* default constructor required by C++11 STL */
-      : contents(),
-	fallback( false ),
-	width( 1 ),
-	renditions( 0 ),
-	wrap( false )
-    {
-      assert( false );
-    }
-
-    void reset( int background_color );
+    void reset( color_type background_color );
 
     bool operator==( const Cell &x ) const
     {
@@ -102,13 +105,15 @@ namespace Terminal {
 	       && (wrap == x.wrap) );
     }
 
+    bool operator!=( const Cell &x ) const { return !operator==( x ); }
+
     wint_t debug_contents( void ) const;
 
     bool is_blank( void ) const
     {
       return ( contents.empty()
-	       || ( (contents.size() == 1) && ( (contents.front() == 0x20)
-						|| (contents.front() == 0xA0) ) ) );
+	       || contents == " "
+	       || contents == "\xC2\xA0" );
     }
 
     bool contents_match ( const Cell &other ) const
@@ -118,6 +123,26 @@ namespace Terminal {
     }
 
     bool compare( const Cell &other ) const;
+
+    static void append_to_str( std::string &dest, const wchar_t c )
+    {
+      static mbstate_t ps = mbstate_t();
+      char tmp[MB_LEN_MAX];
+      size_t ignore = wcrtomb(NULL, 0, &ps);
+      (void)ignore;
+      size_t len = wcrtomb(tmp, c, &ps);
+      dest.append( tmp, len );
+    }
+
+    void append( const wchar_t c )
+    {
+      static mbstate_t ps = mbstate_t();
+      char tmp[MB_LEN_MAX];
+      size_t ignore = wcrtomb(NULL, 0, &ps);
+      (void)ignore;
+      size_t len = wcrtomb(tmp, c, &ps);
+      contents.insert( contents.end(), tmp, tmp+len );
+    }
   };
 
   class Row {
@@ -125,20 +150,13 @@ namespace Terminal {
     typedef std::vector<Cell> cells_type;
     cells_type cells;
 
-    Row( size_t s_width, int background_color )
-      : cells( s_width, Cell( background_color ) )
-    {}
+    Row( size_t s_width, color_type background_color );
+    Row(); /* default constructor required by C++11 STL */
 
-    Row() /* default constructor required by C++11 STL */
-      : cells( 1, Cell() )
-    {
-      assert( false );
-    }
+    void insert_cell( int col, color_type background_color );
+    void delete_cell( int col, color_type background_color );
 
-    void insert_cell( int col, int background_color );
-    void delete_cell( int col, int background_color );
-
-    void reset( int background_color );
+    void reset( color_type background_color );
 
     bool operator==( const Row &x ) const
     {
@@ -240,7 +258,7 @@ namespace Terminal {
 
     void set_foreground_color( int x ) { renditions.set_foreground_color( x ); }
     void set_background_color( int x ) { renditions.set_background_color( x ); }
-    void add_rendition( int x ) { renditions.set_rendition( x ); }
+    void add_rendition( color_type x ) { renditions.set_rendition( x ); }
     Renditions get_renditions( void ) const { return renditions; }
     int get_background_rendition( void ) const { return renditions.background_color; }
 
@@ -265,11 +283,14 @@ namespace Terminal {
   };
 
   class Framebuffer {
+  public:
+    typedef std::vector<wchar_t> title_type;
+
   private:
-    typedef std::deque<Row> rows_type;
+    typedef std::vector<Row> rows_type;
     rows_type rows;
-    std::deque<wchar_t> icon_name;
-    std::deque<wchar_t> window_title;
+    title_type icon_name;
+    title_type window_title;
     unsigned int bell_count;
     bool title_initialized; /* true if the window title has been set via an OSC */
 
@@ -289,12 +310,7 @@ namespace Terminal {
       return &rows[ row ];
     }
 
-    inline const Cell *get_cell( void ) const
-    {
-      return &rows[ ds.get_cursor_row() ].cells[ ds.get_cursor_col() ];
-    }
-
-    inline const Cell *get_cell( int row, int col ) const
+    inline const Cell *get_cell( int row = -1, int col = -1 ) const
     {
       if ( row == -1 ) row = ds.get_cursor_row();
       if ( col == -1 ) col = ds.get_cursor_col();
@@ -304,22 +320,12 @@ namespace Terminal {
 
     Row *get_mutable_row( int row )
     {
-      if ( row == -1 ) row = ds.get_cursor_row();
-
-      return &rows[ row ];
+      return const_cast<Row *>(get_row( row ));
     }
 
-    inline Cell *get_mutable_cell( void )
+    inline Cell *get_mutable_cell( int row = -1, int col = -1 )
     {
-      return &rows[ ds.get_cursor_row() ].cells[ ds.get_cursor_col() ];
-    }
-
-    inline Cell *get_mutable_cell( int row, int col )
-    {
-      if ( row == -1 ) row = ds.get_cursor_row();
-      if ( col == -1 ) col = ds.get_cursor_col();
-
-      return &rows[ row ].cells[ col ];
+      return const_cast<Cell *>(get_cell( row, col ));
     }
 
     Cell *get_combining_cell( void );
@@ -337,12 +343,12 @@ namespace Terminal {
 
     void set_title_initialized( void ) { title_initialized = true; }
     bool is_title_initialized( void ) const { return title_initialized; }
-    void set_icon_name( const std::deque<wchar_t> &s ) { icon_name = s; }
-    void set_window_title( const std::deque<wchar_t> &s ) { window_title = s; }
-    const std::deque<wchar_t> & get_icon_name( void ) const { return icon_name; }
-    const std::deque<wchar_t> & get_window_title( void ) const { return window_title; }
+    void set_icon_name( const title_type &s ) { icon_name = s; }
+    void set_window_title( const title_type &s ) { window_title = s; }
+    const title_type & get_icon_name( void ) const { return icon_name; }
+    const title_type & get_window_title( void ) const { return window_title; }
 
-    void prefix_window_title( const std::deque<wchar_t> &s );
+    void prefix_window_title( const title_type &s );
 
     void resize( int s_width, int s_height );
 

src/terminal/terminalfunctions.cc

@@ -559,7 +559,7 @@ void Dispatcher::OSC_dispatch( const Parser::OSC_End *act, Framebuffer *fb )
     bool set_title = (cmd_num == 0 || cmd_num == 2);
     if ( set_icon || set_title ) {
       fb->set_title_initialized();
-      std::deque<wchar_t> newtitle( OSC_string.begin() + offset, OSC_string.end() );
+      Terminal::Framebuffer::title_type newtitle( OSC_string.begin() + offset, OSC_string.end() );
       if ( set_icon )  { fb->set_icon_name( newtitle ); }
       if ( set_title ) { fb->set_window_title( newtitle ); }