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

Closes #28 github issue.
2012-03-10 05:41:03 -05:00
parent ac16f9127c
commit b8457dd308
13 changed files with 114 additions and 23 deletions
@@ -0,0 +1,60 @@
+/*
+    Mosh: the mobile shell
+    Copyright 2012 Keith Winstein
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* This is in its own file because otherwise the ncurses #defines
+   alias our own variable names. */
+
+#include "terminaldisplay.h"
+
+#include <string>
+
+#include <curses.h>
+#include <term.h>
+
+using namespace Terminal;
+
+Display::Display( bool use_environment )
+  : has_ech( true )
+{
+  if ( use_environment ) {
+    int errret = -2;
+    int ret = setupterm( (char *)0, 1, &errret );
+
+    if ( ret != OK ) {
+      switch ( errret ) {
+      case 1:
+	throw std::string( "Terminal is hardcopy and cannot be used by curses applications." );
+	break;
+      case 0:
+	throw std::string( "Unknown terminal type." );
+	break;
+      case -1:
+	throw std::string( "Terminfo database could not be found." );
+	break;
+      default:
+	throw std::string( "Unknown terminfo error." );
+	break;
+      } 
+    }
+
+    char *val = tigetstr( "ech" );
+    if ( val <= 0 ) {
+      has_ech = false;
+    }
+  }
+}