Support setting window title (as OS command)

parseraction.cpp

@@ -50,3 +50,18 @@ void Esc_Dispatch::act_on_terminal( Terminal::Emulator *emu )
 {
   emu->Esc_dispatch( this );
 }
+
+void OSC_Put::act_on_terminal( Terminal::Emulator *emu )
+{
+  emu->dispatch.OSC_put( this );
+}
+
+void OSC_Start::act_on_terminal( Terminal::Emulator *emu )
+{
+  emu->dispatch.OSC_start( this );
+}
+
+void OSC_End::act_on_terminal( Terminal::Emulator *emu )
+{
+  emu->OSC_end( this );
+}

parseraction.hpp

@@ -73,13 +73,19 @@ namespace Parser {
   public: std::string name( void ) { return std::string( "Unhook" ); }
   };
   class OSC_Start : public Action {
-  public: std::string name( void ) { return std::string( "OSC_Start" ); }
+  public:
+    std::string name( void ) { return std::string( "OSC_Start" ); }
+    void act_on_terminal( Terminal::Emulator *emu );
   };
   class OSC_Put : public Action {
-  public: std::string name( void ) { return std::string( "OSC_Put" ); }
+  public:
+    std::string name( void ) { return std::string( "OSC_Put" ); }
+    void act_on_terminal( Terminal::Emulator *emu );
   };
   class OSC_End : public Action {
-  public: std::string name( void ) { return std::string( "OSC_End" ); }
+  public:
+    std::string name( void ) { return std::string( "OSC_End" ); }
+    void act_on_terminal( Terminal::Emulator *emu );
   };
 }
 

terminal.cpp

@@ -120,6 +120,12 @@ void Emulator::CSI_dispatch( Parser::CSI_Dispatch *act )
   dispatch.dispatch( CSI, act, &fb );
 }
 
+void Emulator::OSC_end( Parser::OSC_End *act )
+{
+  fb.ds.next_print_will_wrap = false;
+  dispatch.OSC_dispatch( act, &fb );
+}
+
 void Emulator::Esc_dispatch( Parser::Esc_Dispatch *act )
 {
   fb.ds.next_print_will_wrap = false;
@@ -140,6 +146,18 @@ void Emulator::debug_printout( int fd )
   std::string screen;
   screen.append( "\033[H" );
 
+  /* set window title */
+  screen.append( "\033]0;" );
+  std::vector<wchar_t> window_title = fb.get_window_title();
+  for ( std::vector<wchar_t>::iterator i = window_title.begin();
+	i != window_title.end();
+	i++ ) {
+    char utf8[ 8 ];
+    snprintf( utf8, 8, "%lc", *i );
+    screen.append( utf8 );
+  }
+  screen.append( "\x7" ); /* xterm's "OSC" string ends in BEL... */
+
   for ( int y = 0; y < fb.ds.get_height(); y++ ) {
     for ( int x = 0; x < fb.ds.get_width(); /* let charwidth handle advance */ ) {
       char curmove[ 32 ];

terminal.hpp

@@ -19,6 +19,9 @@ namespace Terminal {
     friend void Parser::Collect::act_on_terminal( Emulator * );
     friend void Parser::CSI_Dispatch::act_on_terminal( Emulator * );
     friend void Parser::Esc_Dispatch::act_on_terminal( Emulator * );
+    friend void Parser::OSC_Start::act_on_terminal( Emulator * );
+    friend void Parser::OSC_Put::act_on_terminal( Emulator * );
+    friend void Parser::OSC_End::act_on_terminal( Emulator * );
 
   private:
     Parser::UTF8Parser parser;
@@ -28,18 +31,9 @@ namespace Terminal {
     /* action methods */
     void print( Parser::Print *act );
     void execute( Parser::Execute *act );
-    void param( Parser::Param *act );
-    void collect( Parser::Collect *act );
-    void clear( Parser::Clear *act );
     void CSI_dispatch( Parser::CSI_Dispatch *act );
     void Esc_dispatch( Parser::Esc_Dispatch *act );
-
-    /* CSI and Escape methods */
-    void CSI_EL( void );
-    void CSI_ED( void );
-    void CSI_cursormove( void );
-    void CSI_DA( void );
-    void Esc_DECALN( void );
+    void OSC_end( Parser::OSC_End *act );
 
   public:
     Emulator( size_t s_width, size_t s_height );

terminaldispatcher.cpp

@@ -9,7 +9,7 @@ using namespace Terminal;
 
 Dispatcher::Dispatcher()
   : params(), parsed_params(), parsed( false ), dispatch_chars(),
-    terminal_to_host()
+    OSC_string(), terminal_to_host()
 {}
 
 void Dispatcher::newparamchar( Parser::Param *act )
@@ -146,8 +146,7 @@ Function::Function( Function_Type type, std::string dispatch_chars,
 void Dispatcher::dispatch( Function_Type type, Parser::Action *act, Framebuffer *fb )
 {
   /* add final char to dispatch key */
-
-  if ( type != CONTROL ) {
+  if ( (type == ESCAPE) || (type == CSI) ) {
     assert( act->char_present );
     Parser::Collect act2;
     act2.char_present = true;
@@ -177,3 +176,18 @@ void Dispatcher::dispatch( Function_Type type, Parser::Action *act, Framebuffer
     return i->second.function( fb, this );
   }
 }
+
+void Dispatcher::OSC_put( Parser::OSC_Put *act )
+{
+  assert( act->char_present );
+  if ( OSC_string.size() < 256 ) { /* should be a long enough window title */
+    OSC_string.push_back( act->ch );
+    act->handled = true;
+  }
+}
+
+void Dispatcher::OSC_start( Parser::OSC_Start *act )
+{
+  OSC_string.clear();
+  act->handled = true;
+}

terminaldispatcher.hpp

@@ -13,6 +13,9 @@ namespace Parser {
   class Esc_Dispatch;
   class CSI_Dispatch;
   class Execute;
+  class OSC_Start;
+  class OSC_Put;
+  class OSC_End;
 }
 
 namespace Terminal {
@@ -49,6 +52,7 @@ namespace Terminal {
     bool parsed;
 
     std::string dispatch_chars;
+    std::vector<wchar_t> OSC_string; /* only used to set the window title */
 
     void parse_params( void );
 
@@ -66,7 +70,12 @@ namespace Terminal {
     std::string str( void );
 
     void dispatch( Function_Type type, Parser::Action *act, Framebuffer *fb );
-    const std::string get_dispatch_chars( void ) { return dispatch_chars; }
+    std::string get_dispatch_chars( void ) { return dispatch_chars; }
+    std::vector<wchar_t> get_OSC_string( void ) { return OSC_string; }
+
+    void OSC_put( Parser::OSC_Put *act );
+    void OSC_start( Parser::OSC_Start *act );
+    void OSC_dispatch( Parser::OSC_End *act, Framebuffer *fb );
   };
 }
 

terminalframebuffer.cpp

@@ -55,7 +55,7 @@ DrawState::DrawState( int s_width, int s_height )
 }
 
 Framebuffer::Framebuffer( int s_width, int s_height )
-  : rows( s_height, Row( s_width ) ), ds( s_width, s_height )
+  : rows( s_height, Row( s_width ) ), window_title(), ds( s_width, s_height )
 {}
 
 void Framebuffer::scroll( int N )
@@ -311,6 +311,7 @@ void Framebuffer::reset( void )
 {
   int width = ds.get_width(), height = ds.get_height();
   rows = std::deque<Row>( height, Row( width ) );
+  window_title.clear();
   ds = DrawState( width, height );
 }
 

terminalframebuffer.hpp

@@ -3,6 +3,7 @@
 
 #include <vector>
 #include <deque>
+#include <string>
 
 /* Terminal framebuffer */
 
@@ -109,6 +110,7 @@ namespace Terminal {
   class Framebuffer {
   private:
     std::deque<Row> rows;
+    std::vector<wchar_t> window_title;
 
     void scroll( int N );
 
@@ -132,6 +134,9 @@ namespace Terminal {
 
     void reset( void );
     void soft_reset( void );
+
+    void set_window_title( std::vector<wchar_t> s ) { window_title = s; }
+    std::vector<wchar_t> get_window_title( void ) { return window_title; }
   };
 }
 

terminalfunctions.cpp

@@ -1,7 +1,9 @@
 #include <unistd.h>
+#include <string>
 
 #include "terminaldispatcher.hpp"
 #include "terminalframebuffer.hpp"
+#include "parseraction.hpp"
 
 using namespace Terminal;
 
@@ -457,3 +459,18 @@ void CSI_DECSTR( Framebuffer *fb, Dispatcher *dispatch __attribute((unused)) )
 }
 
 static Function func_CSI_DECSTR( CSI, "!p", CSI_DECSTR );
+
+/* xterm uses an Operating System Command to set the window title */
+void Dispatcher::OSC_dispatch( Parser::OSC_End *act, Framebuffer *fb )
+{
+  if ( OSC_string.size() >= 2 ) {
+    if ( (OSC_string[ 0 ] == L'0')
+	 && (OSC_string[ 1 ] == L';') ) {
+      std::vector<wchar_t> newtitle = OSC_string;
+      newtitle.erase( newtitle.begin() );
+      newtitle.erase( newtitle.begin() );
+      fb->set_window_title( newtitle );
+      act->handled = true;
+    }
+  }
+}