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terminal.c
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terminal.c
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/*
* terminal.c
*
* This is the screen-like terminal emulator; it is a better vt100 and supports the
* same commands that screen does (including color etc).
*
* The interface is vim_shell_terminal_input and vim_shell_terminal_output. These
* functions get characters from the shell (or from the user) and process them
* accordingly to the terminal rules (ESC sequences etc). They then work directly
* on the vim_shell-window-buffer, updating its contents.
*
* VIMSHELL TODO: *) don't scroll scroll region if cursor is outside
* *) change the buffer name according to the window title
* *) CSI (0x9B)
* *) Get the ESC codes for switching charsets from terminfo/termcap
* *) Origin mode
* *) "erase with background color"
*
* This file is part of the VIM-Shell project. http://vimshell.wana.at
*
* Author: Thomas Wana <thomas@wana.at>
*
*/
static char *RCSID="$Id$";
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include "vim.h"
#ifdef FEAT_VIMSHELL
#ifdef VIMSHELL_DEBUG
# define ESCDEBUG
/*
* Really extreme logging
* Log *every* character we write to the shell
*/
//# define VERBOSE
#endif
#ifdef ESCDEBUG
# define ESCDEBUGPRINTF(a...) if(vimshell_debug_fp) { fprintf(vimshell_debug_fp, a); fflush(vimshell_debug_fp); }
#else
# define ESCDEBUGPRINTF(a...)
#endif
#ifdef VERBOSE
# define VERBOSEPRINTF(a...) if(vimshell_debug_fp) { fprintf(vimshell_debug_fp, a); fflush(vimshell_debug_fp); }
#else
# define VERBOSEPRINTF(a...)
#endif
/*
* These are the VIM keynames.
*/
#define VIMSHELL_KEY_DOWN K_DOWN
#define VIMSHELL_KEY_UP K_UP
#define VIMSHELL_KEY_LEFT K_LEFT
#define VIMSHELL_KEY_RIGHT K_RIGHT
#define VIMSHELL_KEY_HOME K_HOME
#define VIMSHELL_KEY_BACKSPACE K_BS
#define VIMSHELL_KEY_F1 K_F1
#define VIMSHELL_KEY_F2 K_F2
#define VIMSHELL_KEY_F3 K_F3
#define VIMSHELL_KEY_F4 K_F4
#define VIMSHELL_KEY_F5 K_F5
#define VIMSHELL_KEY_F6 K_F6
#define VIMSHELL_KEY_F7 K_F7
#define VIMSHELL_KEY_F8 K_F8
#define VIMSHELL_KEY_F9 K_F9
#define VIMSHELL_KEY_F10 K_F10
#define VIMSHELL_KEY_F11 K_F11
#define VIMSHELL_KEY_F12 K_F12
#define VIMSHELL_KEY_DC K_DEL
#define VIMSHELL_KEY_END K_END
#define VIMSHELL_KEY_IC K_INS
#define VIMSHELL_KEY_NPAGE K_PAGEDOWN
#define VIMSHELL_KEY_PPAGE K_PAGEUP
#define VIMSHELL_KEY_K0 K_K0
#define VIMSHELL_KEY_K1 K_K1
#define VIMSHELL_KEY_K2 K_K2
#define VIMSHELL_KEY_K3 K_K3
#define VIMSHELL_KEY_K4 K_K4
#define VIMSHELL_KEY_K5 K_K5
#define VIMSHELL_KEY_K6 K_K6
#define VIMSHELL_KEY_K7 K_K7
#define VIMSHELL_KEY_K8 K_K8
#define VIMSHELL_KEY_K9 K_K9
#define VIMSHELL_KEY_KPLUS K_KPLUS
#define VIMSHELL_KEY_KMINUS K_KMINUS
#define VIMSHELL_KEY_KDIVIDE K_KDIVIDE
#define VIMSHELL_KEY_KMULTIPLY K_KMULTIPLY
#define VIMSHELL_KEY_KENTER K_KENTER
#define VIMSHELL_KEY_KPOINT K_KPOINT
static void terminal_ED(struct vim_shell_window *shell, int argc, char argv[20][20]);
static void terminal_CUP(struct vim_shell_window *shell, int argc, char argv[20][20]);
static int terminal_flush_output(struct vim_shell_window *shell);
/*
* A routine that prints a buffer in 'hexdump -C'-style via printf
*/
static void hexdump(FILE *fp, unsigned char *buffer, long len)
{
unsigned long pos=0;
while(len>0)
{
int i;
fprintf(fp,"%08x ",(unsigned int)pos);
for(i=0;i<16 && i<len;i++)
{
fprintf(fp,"%02x ",buffer[pos+i]);
if(i==7 || i==15)
fprintf(fp," ");
}
fprintf(fp,"|");
for(i=0;i<16 && i<len;i++)
{
unsigned char c=buffer[pos+i];
if(isprint(c))
{
fprintf(fp,"%c",c);
}
else
{
fprintf(fp,".");
}
}
fprintf(fp,"|\n");
len-=16;
pos+=16;
}
}
/*
* Tabulation Clear (TBC)
*
* 9/11 6/7
* CSI g
*
* Clears a horizontal tab stop at cursor position.
*
* 9/11 3/0 6/7
* CSI 0 g
*
* Clears a horizontal tab stop at cursor position.
*
* 9/11 3/3 6/7
* CSI 3 g
*
* Clears all horizontal tab stops.
*/
static void terminal_TBC(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int param;
if(argc==0)
{
param=0;
}
else if(argc>1)
{
ESCDEBUGPRINTF("%s: sequence error\n", __FUNCTION__);
return;
}
// VIMSHELL TODO: DRINGEND! wenn argc==0 dann ist argv[0] NULL und wir crashen
// hier ... passiert in einigen Funktionen, dank copy+paste! Super gmocht Tom!
param=strtol(argv[0], NULL, 10);
switch(param)
{
case 0:
shell->tabline[shell->cursor_x]=0;
break;
case 3:
memset(shell->tabline, 0, shell->size_x);
break;
default:
ESCDEBUGPRINTF( "%s: sequence error (2)\n", __FUNCTION__);
}
}
/*
* CUB . Cursor Backward . Host to VT100 and VT100 to Host
* ESC [ Pn D default value: 1
*
* The CUB sequence moves the active position to the left. The distance moved is
* determined by the parameter. If the parameter value is zero or one, the active
* position is moved one position to the left. If the parameter value is n, the active
* position is moved n positions to the left. If an attempt is made to move the cursor
* to the left of the left margin, the cursor stops at the left margin. Editor Function
*/
static void terminal_CUB(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int distance;
if(argc==0)
{
distance=1;
}
else if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
distance=strtol(argv[0], NULL, 10);
if(distance==0)
distance=1;
if(shell->cursor_x<distance)
shell->cursor_x=0;
else
shell->cursor_x-=distance;
}
/*
* CUU . Cursor Up . Host to VT100 and VT100 to Host
* ESC [ Pn A default value: 1
*
* Moves the active position upward without altering the column position. The
* number of lines moved is determined by the parameter. A parameter value of zero
* or one moves the active position one line upward. A parameter value of n moves the
* active position n lines upward. If an attempt is made to move the cursor above the
* top margin, the cursor stops at the top margin. Editor Function
*/
static void terminal_CUU(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int distance;
if(argc==0)
{
distance=1;
}
else if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
distance=strtol(argv[0], NULL, 10);
if(distance==0)
distance=1;
if((int)shell->cursor_y-distance<shell->scroll_top_margin)
shell->cursor_y=shell->scroll_top_margin;
else
shell->cursor_y-=distance;
}
/*
* CUD . Cursor Down . Host to VT100 and VT100 to Host
* ESC [ Pn B default value: 1
*
* The CUD sequence moves the active position downward without altering the column
* position. The number of lines moved is determined by the parameter. If the parameter
* value is zero or one, the active position is moved one line downward. If the parameter
* value is n, the active position is moved n lines downward. In an attempt is made to
* move the cursor below the bottom margin, the cursor stops at the bottom margin. Editor Function
*/
static void terminal_CUD(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int distance;
if(argc==0)
{
distance=1;
}
else if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
distance=strtol(argv[0], NULL, 10);
if(distance==0)
distance=1;
shell->cursor_y+=distance;
if(shell->cursor_y+1>=shell->scroll_bottom_margin)
shell->cursor_y=shell->scroll_bottom_margin;
}
/*
* CUF . Cursor Forward . Host to VT100 and VT100 to Host
* ESC [ Pn C default value: 1
*
* The CUF sequence moves the active position to the right. The distance moved is
* determined by the parameter. A parameter value of zero or one moves the active
* position one position to the right. A parameter value of n moves the active position n
* positions to the right. If an attempt is made to move the cursor to the right
* of the right margin, the cursor stops at the right margin. Editor Function
*/
static void terminal_CUF(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int distance;
if(argc==0)
{
distance=1;
}
else if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
distance=strtol(argv[0], NULL, 10);
if(distance==0)
distance=1;
shell->cursor_x+=distance;
if(shell->cursor_x+1>=shell->size_x)
shell->cursor_x=shell->size_x+1;
}
/*
* SGR . Select Graphic Rendition
* ESC [ Ps ; . . . ; Ps m default value: 0
*
* Invoke the graphic rendition specified by the parameter(s). All following characters
* transmitted to the VT100 are rendered according to the parameter(s) until the next
* occurrence of SGR. Format Effector
*
* Parameter Parameter Meaning
* 0 Attributes off
* 1 Bold or increased intensity
* 4 Underscore
* 5 Blink
* 7 Negative (reverse) image
*
* All other parameter values are ignored.
*
* With the Advanced Video Option, only one type of character attribute is possible as
* determined by the cursor selection; in that case specifying either the underscore or
* the reverse attribute will activate the currently selected attribute. (See cursor
* selection in Chapter 1).
*/
static void terminal_SGR(struct vim_shell_window *shell, int argc, char argv[20][20])
{
if(argc==0)
{
shell->rendition=0;
shell->fgcolor=VIMSHELL_COLOR_DEFAULT; // default fgcolor
shell->bgcolor=VIMSHELL_COLOR_DEFAULT; // default bgcolor
}
else
{
int i;
for(i=0;i<argc;i++)
{
int val;
switch((val=strtol(argv[i], NULL, 10)))
{
case 0:
shell->rendition=0;
shell->fgcolor=VIMSHELL_COLOR_DEFAULT;
shell->bgcolor=VIMSHELL_COLOR_DEFAULT;
break;
case 1:
shell->rendition|=RENDITION_BOLD;
break;
case 2:
shell->rendition|=RENDITION_DIM;
break;
case 4:
shell->rendition|=RENDITION_UNDERSCORE;
break;
case 5:
shell->rendition|=RENDITION_BLINK;
break;
case 7:
shell->rendition|=RENDITION_NEGATIVE;
break;
case 8:
shell->rendition|=RENDITION_HIDDEN;
break;
case 22:
shell->rendition&=~RENDITION_BOLD;
break;
case 24:
shell->rendition&=~RENDITION_UNDERSCORE;
break;
case 25:
shell->rendition&=~RENDITION_BLINK;
break;
case 27:
shell->rendition&=~RENDITION_NEGATIVE;
break;
default:
if(val>=30 && val<=37)
shell->fgcolor=val-30;
else if(val>=40 && val<=47)
shell->bgcolor=val-40;
else if(val==39)
shell->fgcolor=VIMSHELL_COLOR_DEFAULT; // default fgcolor
else if(val==49)
shell->bgcolor=VIMSHELL_COLOR_DEFAULT; // default bgcolor
else
ESCDEBUGPRINTF( "%s: unknown rendition %s\n",
__FUNCTION__, argv[i]);
}
}
}
ESCDEBUGPRINTF("%s: rendition is now: %04x\n", __FUNCTION__, shell->rendition);
ESCDEBUGPRINTF("%s: foreground color: %d, background color: %d\n", __FUNCTION__,
shell->fgcolor, shell->bgcolor);
}
/*
* Copy the screen contents to the alternate screen.
*/
static void terminal_backup_screen(struct vim_shell_window *shell)
{
size_t len;
if(shell->alt!=NULL)
{
ESCDEBUGPRINTF( "%s: WARNING: alternate screen taken\n", __FUNCTION__);
vim_shell_free(shell->alt->winbuf);
vim_shell_free(shell->alt->bgbuf);
vim_shell_free(shell->alt->fgbuf);
vim_shell_free(shell->alt->rendbuf);
vim_shell_free(shell->alt->tabline);
vim_shell_free(shell->alt->charset);
vim_shell_free(shell->alt);
shell->alt=NULL;
}
shell->alt=(struct vim_shell_window *)vim_shell_malloc(sizeof(struct vim_shell_window));
if(shell->alt==NULL)
{
ESCDEBUGPRINTF( "%s: ERROR: unable to allocate a new screen\n", __FUNCTION__);
return;
}
*(shell->alt)=*shell;
len=shell->size_x*shell->size_y;
shell->alt->winbuf=(uint8_t *)vim_shell_malloc(len);
shell->alt->fgbuf=(uint8_t *)vim_shell_malloc(len);
shell->alt->bgbuf=(uint8_t *)vim_shell_malloc(len);
shell->alt->rendbuf=(uint8_t *)vim_shell_malloc(len);
shell->alt->tabline=(uint8_t *)vim_shell_malloc(shell->size_x);
shell->alt->charset=(uint8_t *)vim_shell_malloc(len);
if(shell->alt->winbuf==NULL || shell->alt->winbuf==NULL || shell->alt->winbuf==NULL || shell->alt->winbuf==NULL ||
shell->alt->charset==NULL || shell->alt->tabline==NULL)
{
ESCDEBUGPRINTF( "%s: ERROR: unable to allocate buffers\n", __FUNCTION__);
if(shell->alt->winbuf) vim_shell_free(shell->alt->winbuf);
if(shell->alt->fgbuf) vim_shell_free(shell->alt->fgbuf);
if(shell->alt->bgbuf) vim_shell_free(shell->alt->bgbuf);
if(shell->alt->rendbuf) vim_shell_free(shell->alt->rendbuf);
if(shell->alt->tabline) vim_shell_free(shell->alt->tabline);
if(shell->alt->charset) vim_shell_free(shell->alt->charset);
vim_shell_free(shell->alt);
shell->alt=NULL;
return;
}
memcpy(shell->alt->winbuf, shell->winbuf, len);
memcpy(shell->alt->fgbuf, shell->fgbuf, len);
memcpy(shell->alt->bgbuf, shell->bgbuf, len);
memcpy(shell->alt->rendbuf, shell->rendbuf, len);
memcpy(shell->alt->charset, shell->charset, len);
memcpy(shell->alt->tabline, shell->tabline, shell->size_x);
}
/*
* Restore the alternate screen
*/
static void terminal_restore_screen(struct vim_shell_window *shell)
{
struct vim_shell_window *alt;
if(shell->alt==NULL)
{
ESCDEBUGPRINTF( "%s: WARNING: nothing to restore\n", __FUNCTION__);
return;
}
vim_shell_free(shell->winbuf);
vim_shell_free(shell->rendbuf);
vim_shell_free(shell->tabline);
vim_shell_free(shell->fgbuf);
vim_shell_free(shell->bgbuf);
vim_shell_free(shell->charset);
alt=shell->alt;
*shell=*(shell->alt);
shell->alt=NULL;
vim_shell_free(alt);
/*
* Invalidate the shell so it will be fully redrawn
*/
shell->force_redraw=1;
}
/*
* Erases the whole screen and homes the cursor.
*/
static void terminal_init_screen(struct vim_shell_window *shell)
{
char ed_argv[20][20];
strcpy(ed_argv[0], "2");
/*
* Erase all of the display.
*/
terminal_ED(shell, 1, ed_argv);
/*
* Cursor to HOME position.
*/
terminal_CUP(shell, 0, NULL);
}
static void terminal_mode(struct vim_shell_window *shell, int set, int argc, char argv[20][20])
{
int i;
for(i=0;i<argc;i++)
{
if(!strcmp(argv[i], "4"))
{
shell->insert_mode=set;
ESCDEBUGPRINTF( "%s: insert mode: %d\n", __FUNCTION__, set);
}
else if(!strcmp(argv[i], "?1"))
{
shell->application_cursor_mode=set;
ESCDEBUGPRINTF( "%s: application cursor mode: %d\n", __FUNCTION__, set);
}
else if(!strcmp(argv[i], "?5"))
{
ESCDEBUGPRINTF("%s: background dark/light mode ignored\n", __FUNCTION__);
}
else if(!strcmp(argv[i], "?6"))
{
ESCDEBUGPRINTF("%s: set terminal width ignored\n", __FUNCTION__);
}
else if(!strcmp(argv[i], "?7"))
{
shell->wraparound=set;
ESCDEBUGPRINTF( "%s: wraparound: %d\n", __FUNCTION__, set);
}
else if(!strcmp(argv[i], "34") || !strcmp(argv[i], "?25"))
{
shell->cursor_visible=set;
ESCDEBUGPRINTF( "%s: cursor visible: %d\n", __FUNCTION__, set);
}
else if(!strcmp(argv[i], "?4"))
{
ESCDEBUGPRINTF("%s: selection between smooth and jump scrolling ignored\n",__FUNCTION__);
}
else if(!strcmp(argv[i], "?1049") || !strcmp(argv[i], "?1047"))
{
if(set==1)
{
terminal_backup_screen(shell);
terminal_init_screen(shell);
ESCDEBUGPRINTF( "%s: terminal screen backed up.\n", __FUNCTION__);
}
else
{
terminal_restore_screen(shell);
ESCDEBUGPRINTF( "%s: terminal screen restored from backup.\n", __FUNCTION__);
}
}
else
{
ESCDEBUGPRINTF( "%s: unimplemented terminal mode: %s\n", __FUNCTION__, argv[i]);
}
}
}
/*
* EL . Erase In Line
* ESC [ Ps K default value: 0
*
* Erases some or all characters in the active line according to the parameter. Editor Function
*
* Parameter Parameter Meaning
* 0 Erase from the active position to the end of the line, inclusive (default)
* 1 Erase from the start of the line to the active position, inclusive
* 2 Erase all of the line, inclusive
*/
static void terminal_EL(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int i, size, pos;
if(argc==0)
i=0;
else if(argc==1)
i=strtol(argv[0], NULL, 10);
else
{
/*
* Error in sequence
*/
ESCDEBUGPRINTF( "%s: error in sequence\n", __FUNCTION__);
return;
}
size=shell->size_x*shell->size_y;
pos=shell->cursor_y*shell->size_x+shell->cursor_x;
if(i==0)
{
/*
* erase from the active position to the end of line
*/
memset(shell->winbuf+pos, ' ', shell->size_x-shell->cursor_x);
memset(shell->fgbuf+pos, VIMSHELL_COLOR_DEFAULT, shell->size_x-shell->cursor_x);
memset(shell->bgbuf+pos, VIMSHELL_COLOR_DEFAULT, shell->size_x-shell->cursor_x);
memset(shell->rendbuf+pos, 0, shell->size_x-shell->cursor_x);
memset(shell->charset+pos, 0, shell->size_x-shell->cursor_x);
ESCDEBUGPRINTF( "%s: erase from active position to end of line\n", __FUNCTION__);
}
else if(i==1)
{
/*
* erase from start of the line to the active position, inclusive
*/
memset(shell->winbuf+shell->cursor_y*shell->size_x, ' ', shell->cursor_x);
memset(shell->fgbuf+ shell->cursor_y*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->cursor_x);
memset(shell->bgbuf+ shell->cursor_y*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->cursor_x);
memset(shell->rendbuf+shell->cursor_y*shell->size_x, 0, shell->cursor_x);
memset(shell->charset+shell->cursor_y*shell->size_x, 0, shell->cursor_x);
ESCDEBUGPRINTF( "%s: erase from start of line to active position\n", __FUNCTION__);
}
else if(i==2)
{
/*
* Erase all of the line
*/
memset(shell->winbuf +shell->cursor_y*shell->size_x, ' ', shell->size_x);
memset(shell->fgbuf +shell->cursor_y*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->bgbuf +shell->cursor_y*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->rendbuf+shell->cursor_y*shell->size_x, 0, shell->size_x);
memset(shell->charset+shell->cursor_y*shell->size_x, 0, shell->size_x);
ESCDEBUGPRINTF( "%s: erase all of the line\n", __FUNCTION__);
}
else
{
ESCDEBUGPRINTF( "%s: error in sequence (2)\n", __FUNCTION__);
return;
}
}
/*
* ED . Erase In Display
* ESC [ Ps J default value: 0
*
* This sequence erases some or all of the characters in the display according
* to the parameter. Any complete line erased by this sequence will return that
* line to single width mode. Editor Function
*
* Parameter Parameter Meaning
* 0 Erase from the active position to the end of the screen, inclusive (default)
* 1 Erase from start of the screen to the active position, inclusive
* 2 Erase all of the display . all lines are erased, changed to single-width, and the cursor does not move.
*/
static void terminal_ED(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int i, size, pos;
if(argc==0)
i=0;
else if(argc==1)
i=strtol(argv[0], NULL, 10);
else
{
/*
* Error in sequence
*/
ESCDEBUGPRINTF( "%s: error in sequence\n", __FUNCTION__);
return;
}
size=shell->size_x*shell->size_y;
pos=shell->cursor_y*shell->size_x+shell->cursor_x;
if(i==0)
{
/*
* erase from the active position to the end of screen
*/
memset(shell->winbuf+pos, ' ', size-pos);
memset(shell->fgbuf+pos, VIMSHELL_COLOR_DEFAULT, size-pos);
memset(shell->bgbuf+pos, VIMSHELL_COLOR_DEFAULT, size-pos);
memset(shell->rendbuf+pos, 0, size-pos);
memset(shell->charset+pos, 0, size-pos);
ESCDEBUGPRINTF( "%s: erase from active position to end of screen\n", __FUNCTION__);
}
else if(i==1)
{
/*
* erase from start of the screen to the active position, inclusive
*/
memset(shell->winbuf, ' ', pos);
memset(shell->fgbuf, VIMSHELL_COLOR_DEFAULT, pos);
memset(shell->bgbuf, VIMSHELL_COLOR_DEFAULT, pos);
memset(shell->rendbuf, 0, pos);
memset(shell->charset, 0, pos);
ESCDEBUGPRINTF( "%s: erase from start of screen to active position\n", __FUNCTION__);
}
else if(i==2)
{
/*
* Erase all of the display
*/
memset(shell->winbuf, ' ', size);
memset(shell->fgbuf, VIMSHELL_COLOR_DEFAULT, size);
memset(shell->bgbuf, VIMSHELL_COLOR_DEFAULT, size);
memset(shell->rendbuf, 0, size);
memset(shell->charset, 0, size);
ESCDEBUGPRINTF( "%s: erase all of the display\n", __FUNCTION__);
}
else
{
ESCDEBUGPRINTF( "%s: error in sequence (2)\n", __FUNCTION__);
return;
}
}
/*
* CUP . Cursor Position
* ESC [ Pn ; Pn H default value: 1
*
* The CUP sequence moves the active position to the position specified by
* the parameters. This sequence has two parameter values, the first specifying
* the line position and the second specifying the column position. A parameter
* value of zero or one for the first or second parameter moves the active
* position to the first line or column in the display, respectively. The default
* condition with no parameters present is equivalent to a cursor to home action.
* In the VT100, this control behaves identically with its format effector
* counterpart, HVP. Editor Function
*
* The numbering of lines depends on the state of the Origin Mode (DECOM).
*/
static void terminal_CUP(struct vim_shell_window *shell, int argc, char argv[20][20])
{
if(argc==0)
{
/*
* goto home position
*/
shell->cursor_x=0;
shell->cursor_y=0;
}
else if(argc==2)
{
int x, y;
y=strtol(argv[0], NULL, 10);
x=strtol(argv[1], NULL, 10);
if(x==0)
x++;
if(y==0)
y++;
shell->cursor_y=y-1;
shell->cursor_x=x-1;
// VIMSHELL TODO: if origin mode enabled, position at the
// top margin or so :)
if(shell->cursor_x>=shell->size_x)
shell->cursor_x=shell->size_x-1;
if(shell->cursor_y>=shell->size_y)
shell->cursor_y=shell->size_y-1;
}
else
{
/*
* Error in sequence
*/
ESCDEBUGPRINTF( "%s: error in sequence\n", __FUNCTION__);
return;
}
ESCDEBUGPRINTF( "%s: moved to X = %d, Y = %d\n", __FUNCTION__, shell->cursor_x, shell->cursor_y);
}
/*
* DECSTBM . Set Top and Bottom Margins (DEC Private)
* ESC [ Pn; Pn r default values: see below
*
* This sequence sets the top and bottom margins to define the scrolling region.
* The first parameter is the line number of the first line in the scrolling region; the
* second parameter is the line number of the bottom line in the scrolling region. Default
* is the entire screen (no margins). The minimum size of the scrolling region allowed is
* two lines, i.e., the top margin must be less than the bottom margin. The cursor is placed
* in the home position (see Origin Mode DECOM).
*/
static void terminal_DECSTBM(struct vim_shell_window *shell, int argc, char argv[20][20])
{
if(argc!=2)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
shell->scroll_top_margin=strtol(argv[0], NULL, 10)-1;
shell->scroll_bottom_margin=strtol(argv[1], NULL, 10)-1;
ESCDEBUGPRINTF( "%s: top margin = %d, bottom margin = %d\n", __FUNCTION__,
shell->scroll_top_margin, shell->scroll_bottom_margin);
if(shell->scroll_top_margin>=shell->scroll_bottom_margin)
{
ESCDEBUGPRINTF( "%s: scroll margin error %d >= %d\n", __FUNCTION__,
shell->scroll_top_margin, shell->scroll_bottom_margin);
shell->scroll_top_margin=0;
shell->scroll_bottom_margin=shell->size_y-1;
return;
}
// Move cursor into home position
terminal_CUP(shell, 0, NULL);
}
// Status: 100%
static void terminal_scroll_up(struct vim_shell_window *shell)
{
// VIMSHELL TODO: maintain a scrollback buffer? copy the first line into
// a scrollback buffer.
/*
* scroll up by moving up the screen buffer a whole line. blank out
* the last line.
*/
int len, from, to;
ESCDEBUGPRINTF( "%s: done\n", __FUNCTION__);
len=shell->scroll_bottom_margin-shell->scroll_top_margin;
len*=shell->size_x;
to=shell->scroll_top_margin*shell->size_x;
from=shell->size_x+shell->scroll_top_margin*shell->size_x;
memmove(shell->winbuf+to, shell->winbuf+from, len);
memmove(shell->fgbuf+to, shell->fgbuf+from, len);
memmove(shell->bgbuf+to, shell->bgbuf+from, len);
memmove(shell->rendbuf+to, shell->rendbuf+from, len);
memmove(shell->charset+to, shell->charset+from, len);
memset(shell->winbuf+shell->scroll_bottom_margin*shell->size_x, ' ', shell->size_x);
memset(shell->fgbuf+shell->scroll_bottom_margin*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->bgbuf+shell->scroll_bottom_margin*shell->size_x, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->rendbuf+shell->scroll_bottom_margin*shell->size_x, 0, shell->size_x);
memset(shell->charset+shell->scroll_bottom_margin*shell->size_x, 0, shell->size_x);
}
// Status: unknown
static void terminal_scroll_down(struct vim_shell_window *shell)
{
/*
* scroll down by moving the screen buffer down a whole line, overwriting
* the last line. Then, blank out the first line.
*/
size_t len;
int from, to;
ESCDEBUGPRINTF( "%s: done\n", __FUNCTION__);
len=shell->scroll_bottom_margin-shell->scroll_top_margin;
len*=shell->size_x;
to=shell->scroll_top_margin*shell->size_x+shell->size_x;
from=shell->scroll_top_margin*shell->size_x;
memmove(shell->winbuf+to, shell->winbuf+from, len);
memmove(shell->fgbuf+to, shell->fgbuf+from, len);
memmove(shell->bgbuf+to, shell->bgbuf+from, len);
memmove(shell->rendbuf+to, shell->rendbuf+from, len);
memmove(shell->charset+to, shell->charset+from, len);
memset(shell->winbuf+from, ' ', shell->size_x);
memset(shell->fgbuf+from, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->bgbuf+from, VIMSHELL_COLOR_DEFAULT, shell->size_x);
memset(shell->rendbuf+from, 0, shell->size_x);
memset(shell->charset+from, 0, shell->size_x);
}
/*
* Insert Line(s) (ANSI).
* ESC [ Pn L
* Inserts Pn lines at the cursor. If fewer than Pn lines remain from the current line to the
* end of the scrolling region, the number of lines inserted is the lesser number. Lines within
* the scrolling region at and below the cursor move down. Lines moved past the bottom margin
* are lost. The cursor is reset to the first column. This sequence is ignored when the
* cursor is outside the scrolling region.
*/
// Status: unknown
static void terminal_IL(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int lines, bak_top;
if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
if(argc==0)
lines=1;
else
{
lines=strtol(argv[0], NULL, 10);
if(lines==0)
lines=1;
}
if(shell->scroll_bottom_margin-shell->cursor_y < lines)
lines=shell->scroll_bottom_margin-shell->cursor_y;
bak_top=shell->scroll_top_margin;
ESCDEBUGPRINTF( "%s: inserted %d lines\n", __FUNCTION__, lines);
/*
* Set a scrolling region around the part we want to move and scroll down 'lines' times.
*/
shell->scroll_top_margin=shell->cursor_y;
while(lines--)
terminal_scroll_down(shell);
shell->scroll_top_margin=bak_top;
shell->cursor_x=0;
}
/*
* Delete Line(s) (ANSI).
* ESC [ Pn M
* Deletes Pn lines starting at the line with the cursor. If fewer than Pn lines remain from
* the current line to the end of the scrolling region, the number of lines deleted is the
* lesser number. As lines are deleted, lines within the scrolling region and below the cursor move
* up, and blank lines are added at the bottom of the scrolling region. The cursor is reset to the
* first column. This sequence is ignored when the cursor is outside the scrolling region.
* VIMSHELL TODO last sentence
*/
// Status: unknown
static void terminal_DL(struct vim_shell_window *shell, int argc, char argv[20][20])
{
int lines, bak_top;
if(argc>1)
{
ESCDEBUGPRINTF( "%s: sequence error\n", __FUNCTION__);
return;
}
if(argc==0)
lines=1;
else
{
lines=strtol(argv[0], NULL, 10);
if(lines==0)
lines=1;
}
if(shell->scroll_bottom_margin-shell->cursor_y < lines)
lines=shell->scroll_bottom_margin-shell->cursor_y;
bak_top=shell->scroll_top_margin;
ESCDEBUGPRINTF( "%s: deleted %d lines\n", __FUNCTION__, lines);
/*
* Set a scrolling region around the part we want to move and scroll up 'lines' times.
*/
shell->scroll_top_margin=shell->cursor_y;
while(lines--)
terminal_scroll_up(shell);
shell->scroll_top_margin=bak_top;
shell->cursor_x=0;
}
/*
* Insert Characters (ANSI)
* ESC [ Pn @