Correctly render on terminals without BCE (fixes #56 github issue)

2012-03-16 13:17:28 -04:00
parent 57d97209c0
commit c896055d15
3 changed files with 22 additions and 4 deletions
@@ -29,7 +29,7 @@
 using namespace Terminal;

 Display::Display( bool use_environment )
-  : has_ech( true )
+  : has_ech( true ), has_bce( true )
 {
  if ( use_environment ) {
    int errret = -2;
@@ -52,12 +52,24 @@ Display::Display( bool use_environment )
      } 
    }

+    /* check for ECH */
    char ech_name[] = "ech";
    char *val = tigetstr( ech_name );
-    if ( val == (char *)-1 )
+    if ( val == (char *)-1 ) {
      throw std::string( "Invalid terminfo string capability " ) + ech_name;
+    }
    if ( val == 0 ) {
      has_ech = false;
    }
+
+    /* check for BCE */
+    char bce_name[] = "bce";
+    int bce_val = tigetflag( bce_name );
+    if ( bce_val == -1 ) {
+      throw std::string( "Invalid terminfo boolean capability " ) + bce_name;
+    }
+    if ( bce_val == 0 ) {
+      has_bce = false;
+    }
  }
 }