support osc 52 clipboard copy integration.

This feature is particularly relevant for mosh for chrome (which also
used in windows I believe).

src/terminal/terminaldispatcher.cc

@@ -42,6 +42,8 @@
 
 using namespace Terminal;
 
+static const size_t MAXIMUM_CLIPBOARD_SIZE = 16*1024;
+
 Dispatcher::Dispatcher()
   : params(), parsed_params(), parsed( false ), dispatch_chars(),
     OSC_string(), terminal_to_host()
@@ -235,7 +237,7 @@ void Dispatcher::dispatch( Function_Type type, const Parser::Action *act, Frameb
 void Dispatcher::OSC_put( const Parser::OSC_Put *act )
 {
   assert( act->char_present );
-  if ( OSC_string.size() < 256 ) { /* should be a long enough window title */
+  if ( OSC_string.size() < MAXIMUM_CLIPBOARD_SIZE) {
     OSC_string.push_back( act->ch );
   }
 }

src/terminal/terminaldisplay.cc

@@ -68,13 +68,13 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
   if ( f.get_bell_count() != frame.last_frame.get_bell_count() ) {
     frame.append( '\007' );
   }
+  typedef Terminal::Framebuffer::title_type title_type;
 
   /* has icon name or window title changed? */
   if ( has_title && f.is_title_initialized() &&
        ( (!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 */
@@ -110,6 +110,18 @@ std::string Display::new_frame( bool initialized, const Framebuffer &last, const
 
   }
 
+  /* has clipboard changed? */
+  if (f.get_clipboard() != frame.last_frame.get_clipboard()) {
+    frame.append( "\033]52;c;" );
+    const title_type &clipboard( f.get_clipboard() );
+    for ( title_type::const_iterator i = clipboard.begin();
+          i != clipboard.end();
+          i++ ) {
+      frame.append( *i );
+    }
+    frame.append( '\007' );
+  }
+
   /* has reverse video state changed? */
   if ( (!initialized)
        || (f.ds.reverse_video != frame.last_frame.ds.reverse_video) ) {

src/terminal/terminalframebuffer.cc

@@ -87,7 +87,7 @@ DrawState::DrawState( int s_width, int s_height )
 }
 
 Framebuffer::Framebuffer( int s_width, int s_height )
-  : rows(), icon_name(), window_title(), bell_count( 0 ), title_initialized( false ), ds( s_width, s_height )
+  : rows(), icon_name(), window_title(), clipboard(), bell_count( 0 ), title_initialized( false ), ds( s_width, s_height )
 {
   assert( s_height > 0 );
   assert( s_width > 0 );
@@ -98,7 +98,8 @@ Framebuffer::Framebuffer( int s_width, int s_height )
 
 Framebuffer::Framebuffer( const Framebuffer &other )
   : rows( other.rows ), icon_name( other.icon_name ), window_title( other.window_title ),
-    bell_count( other.bell_count ), title_initialized( other.title_initialized ), ds( other.ds )
+    clipboard( other.clipboard ), bell_count( other.bell_count ),
+    title_initialized( other.title_initialized ), ds( other.ds )
 {
 }
 
@@ -108,6 +109,7 @@ Framebuffer & Framebuffer::operator=( const Framebuffer &other )
     rows = other.rows;
     icon_name =  other.icon_name;
     window_title = other.window_title;
+    clipboard = other.clipboard;
     bell_count = other.bell_count;
     title_initialized = other.title_initialized;
     ds = other.ds;
@@ -397,6 +399,7 @@ void Framebuffer::reset( void )
   ds = DrawState( width, height );
   rows = rows_type( height, newrow() );
   window_title.clear();
+  clipboard.clear();
   /* do not reset bell_count */
 }
 

src/terminal/terminalframebuffer.h

@@ -365,6 +365,7 @@ namespace Terminal {
     rows_type rows;
     title_type icon_name;
     title_type window_title;
+    title_type clipboard;
     unsigned int bell_count;
     bool title_initialized; /* true if the window title has been set via an OSC */
 
@@ -437,8 +438,10 @@ namespace Terminal {
     bool is_title_initialized( void ) const { return title_initialized; }
     void set_icon_name( const title_type &s ) { icon_name = s; }
     void set_window_title( const title_type &s ) { window_title = s; }
+    void set_clipboard( const title_type &s ) { clipboard = s; }
     const title_type & get_icon_name( void ) const { return icon_name; }
     const title_type & get_window_title( void ) const { return window_title; }
+    const title_type & get_clipboard( void ) const { return clipboard; }
 
     void prefix_window_title( const title_type &s );
 
@@ -452,7 +455,7 @@ namespace Terminal {
 
     bool operator==( const Framebuffer &x ) const
     {
-      return ( rows == x.rows ) && ( window_title == x.window_title ) && ( bell_count == x.bell_count ) && ( ds == x.ds );
+      return ( rows == x.rows ) && ( window_title == x.window_title ) && ( clipboard  == x.clipboard ) && ( bell_count == x.bell_count ) && ( ds == x.ds );
     }
   };
 }

src/terminal/terminalfunctions.cc

@@ -31,6 +31,7 @@
 */
 
 #include <unistd.h>
+#include <algorithm>
 #include <string>
 #include <stdio.h>
 
@@ -39,6 +40,7 @@
 #include "parseraction.h"
 
 using namespace Terminal;
+using namespace std;
 
 /* Terminal functions -- routines activated by CSI, escape or a control char */
 
@@ -559,7 +561,15 @@ static Function func_CSI_DECSTR( CSI, "!p", CSI_DECSTR );
 /* xterm uses an Operating System Command to set the window title */
 void Dispatcher::OSC_dispatch( const Parser::OSC_End *act __attribute((unused)), Framebuffer *fb )
 {
-  if ( OSC_string.size() >= 1 ) {
+  /* handle osc copy clipboard sequence 52;c; */
+  if ( OSC_string.size() >= 5 && OSC_string[ 0 ] == L'5' &&
+       OSC_string[ 1 ] == L'2' && OSC_string[ 2 ] == L';' &&
+       OSC_string[ 3 ] == L'c' && OSC_string[ 4 ] == L';') {
+      Terminal::Framebuffer::title_type clipboard(
+              OSC_string.begin() + 5, OSC_string.end() );
+      fb->set_clipboard( clipboard );
+  /* handle osc terminal title sequence */
+  } else if ( OSC_string.size() >= 1 ) {
     long cmd_num = -1;
     int offset = 0;
     if ( OSC_string[ 0 ] == L';' ) {
@@ -578,7 +588,8 @@ void Dispatcher::OSC_dispatch( const Parser::OSC_End *act __attribute((unused)),
     bool set_title = (cmd_num == 0 || cmd_num == 2);
     if ( set_icon || set_title ) {
       fb->set_title_initialized();
-      Terminal::Framebuffer::title_type newtitle( OSC_string.begin() + offset, OSC_string.end() );
+      int title_length = min(OSC_string.size(), (size_t)256);
+      Terminal::Framebuffer::title_type newtitle( OSC_string.begin() + offset, OSC_string.begin() + title_length );
       if ( set_icon )  { fb->set_icon_name( newtitle ); }
       if ( set_title ) { fb->set_window_title( newtitle ); }
     }