Separate modules by subdirectory

1 files changed, 155 insertions, 0 deletions

diff --git a/src/terminal/terminal.cc b/src/terminal/terminal.cc
new file mode 100644
index 0000000..de5ea3d
--- /dev/null
+++ b/src/terminal/terminal.cc
@@ -0,0 +1,155 @@
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <typeinfo>
+
+#include "terminal.h"
+#include "swrite.h"
+
+using namespace Terminal;
+
+Emulator::Emulator( size_t s_width, size_t s_height )
+  : fb( s_width, s_height ), dispatch(), user()
+{}
+
+std::string Emulator::read_octets_to_host( void )
+{
+  std::string ret = dispatch.terminal_to_host;
+  dispatch.terminal_to_host.clear();
+  return ret;
+}
+
+void Emulator::execute( const Parser::Execute *act )
+{
+  dispatch.dispatch( CONTROL, act, &fb );
+}
+
+void Emulator::print( const Parser::Print *act )
+{
+  assert( act->char_present );
+
+  int chwidth = act->ch == L'\0' ? -1 : wcwidth( act->ch );
+
+  Cell *this_cell = fb.get_mutable_cell();
+
+  Cell *combining_cell = fb.get_combining_cell(); /* can be null if we were resized */
+
+  switch ( chwidth ) {
+  case 1: /* normal character */
+  case 2: /* wide character */
+    if ( fb.ds.auto_wrap_mode && fb.ds.next_print_will_wrap ) {
+      fb.get_mutable_row( -1 )->wrap = true;
+      fb.ds.move_col( 0 );
+      fb.move_rows_autoscroll( 1 );
+    }
+
+    /* wrap 2-cell chars if no room, even without will-wrap flag */
+    if ( fb.ds.auto_wrap_mode
+	 && (chwidth == 2)
+	 && (fb.ds.get_cursor_col() == fb.ds.get_width() - 1) ) {
+      fb.reset_cell( this_cell );
+      fb.get_mutable_row( -1 )->wrap = false;
+      /* There doesn't seem to be a consistent way to get the
+	 downstream terminal emulator to set the wrap-around
+	 copy-and-paste flag on a row that ends with an empty cell
+	 because a wide char was wrapped to the next line. */
+      fb.ds.move_col( 0 );
+      fb.move_rows_autoscroll( 1 );
+    }
+
+    if ( fb.ds.insert_mode ) {
+      for ( int i = 0; i < chwidth; i++ ) {
+	fb.insert_cell( fb.ds.get_cursor_row(), fb.ds.get_cursor_col() );
+      }
+    }
+
+    this_cell = fb.get_mutable_cell();
+
+    fb.reset_cell( this_cell );
+    this_cell->contents.push_back( act->ch );
+    this_cell->width = chwidth;
+    fb.apply_renditions_to_current_cell();
+
+    if ( chwidth == 2 ) { /* erase overlapped cell */
+      if ( fb.ds.get_cursor_col() + 1 < fb.ds.get_width() ) {
+	fb.reset_cell( fb.get_mutable_cell( fb.ds.get_cursor_row(), fb.ds.get_cursor_col() + 1 ) );
+      }
+    }
+
+    fb.ds.move_col( chwidth, true, true );
+
+    act->handled = true;
+    break;
+  case 0: /* combining character */
+    if ( combining_cell == NULL ) { /* character is now offscreen */
+      act->handled = true;
+      break;
+    }
+
+    if ( combining_cell->contents.size() == 0 ) {
+      /* cell starts with combining character */
+      assert( this_cell == combining_cell );
+      assert( combining_cell->width == 1 );
+      combining_cell->fallback = true;
+      fb.ds.move_col( 1, true, true );
+    }
+
+    if ( combining_cell->contents.size() < 16 ) {
+      /* seems like a reasonable limit on combining characters */
+      combining_cell->contents.push_back( act->ch );
+    }
+    act->handled = true;
+    break;
+  case -1: /* unprintable character */
+    break;
+  default:
+    assert( false );
+  }
+}
+
+void Emulator::CSI_dispatch( const Parser::CSI_Dispatch *act )
+{
+  dispatch.dispatch( CSI, act, &fb );
+}
+
+void Emulator::OSC_end( const Parser::OSC_End *act )
+{
+  dispatch.OSC_dispatch( act, &fb );
+}
+
+void Emulator::Esc_dispatch( const Parser::Esc_Dispatch *act )
+{
+  /* handle 7-bit ESC-encoding of C1 control characters */
+  if ( (dispatch.get_dispatch_chars().size() == 0)
+       && (0x40 <= act->ch)
+       && (act->ch <= 0x5F) ) {
+    Parser::Esc_Dispatch act2 = *act;
+    act2.ch += 0x40;
+    dispatch.dispatch( CONTROL, &act2, &fb );
+  } else {
+    dispatch.dispatch( ESCAPE, act, &fb );
+  }
+}
+
+std::string Emulator::open( void )
+{
+  char appmode[ 6 ] = { 0x1b, '[', '?', '1', 'h', 0 };
+  return std::string( appmode );
+}
+
+std::string Emulator::close( void )
+{
+  return std::string( "\033[?1l\033[!p" );
+}
+
+void Emulator::resize( size_t s_width, size_t s_height )
+{
+  fb.resize( s_width, s_height );
+}
+
+bool Emulator::operator==( Emulator const &x ) const
+{
+  /* dispatcher and user are irrelevant for us */
+  return ( fb == x.fb );
+}