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#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 );
}
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