Use TERM env var / terminfo to decide whether to send ECH. Fixes tmux bug.

Closes #28 github issue.

src/frontend/mosh-client.cc

@@ -89,6 +89,8 @@ int main( int argc, char *argv[] )
   } catch ( Crypto::CryptoException e ) {
     fprintf( stderr, "Crypto exception: %s\r\n",
 	     e.text.c_str() );
+  } catch ( std::string s ) {
+    fprintf( stderr, "Error: %s\r\n", s.c_str() );
   }
 
   printf( "\n[mosh is exiting.]\n" );

src/frontend/stmclient.cc

@@ -130,7 +130,7 @@ void STMClient::main_init( void )
   local_framebuffer = new Terminal::Framebuffer( window_size.ws_col, window_size.ws_row );
 
   /* initialize screen */
-  string init = Terminal::Display::new_frame( false, *local_framebuffer, *local_framebuffer );
+  string init = display.new_frame( false, *local_framebuffer, *local_framebuffer );
   swrite( STDOUT_FILENO, init.data(), init.size() );
 
   /* open network */
@@ -158,11 +158,11 @@ void STMClient::output_new_frame( void )
   overlays.apply( new_state );
 
   /* calculate minimal difference from where we are */
-  const string diff( Terminal::Display::new_frame( !repaint_requested,
-						   *local_framebuffer,
-						   new_state ) );
+  const string diff( display.new_frame( !repaint_requested,
+					*local_framebuffer,
+					new_state ) );
   swrite( STDOUT_FILENO, diff.data(), diff.size() );
-  *local_framebuffer = new_state;  
+  *local_framebuffer = new_state;
 
   repaint_requested = false;
 }

src/frontend/stmclient.h

@@ -42,6 +42,7 @@ private:
   Terminal::Framebuffer *local_framebuffer;
   Overlay::OverlayManager overlays;
   Network::Transport< Network::UserStream, Terminal::Complete > *network;
+  Terminal::Display display;
 
   bool repaint_requested, quit_sequence_started;
 
@@ -61,6 +62,7 @@ public:
       local_framebuffer( NULL ),
       overlays(),
       network( NULL ),
+      display( true ), /* use TERM environment var to initialize display */
       repaint_requested( false ),
       quit_sequence_started( false )
   {