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fish-shell/builtin_commandline.c

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/** \file builtin_commandline.c Functions defining the commandline builtin
Functions used for implementing the commandline builtin.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
#include <sys/types.h>
#include <termios.h>
#include <signal.h>
#include "fallback.h"
#include "util.h"
#include "wutil.h"
#include "builtin.h"
#include "common.h"
#include "wgetopt.h"
#include "reader.h"
#include "proc.h"
#include "parser.h"
#include "tokenizer.h"
#include "input_common.h"
#include "input.h"
#include "parse_util.h"
/**
Which part of the comandbuffer are we operating on
*/
enum
{
STRING_MODE=1, /**< Operate on entire buffer */
JOB_MODE, /**< Operate on job under cursor */
PROCESS_MODE, /**< Operate on process under cursor */
TOKEN_MODE /**< Operate on token under cursor */
}
;
/**
For text insertion, how should it be done
*/
enum
{
REPLACE_MODE=1, /**< Replace current text */
INSERT_MODE, /**< Insert at cursor position */
APPEND_MODE /**< Insert at end of current token/command/buffer */
}
;
static wchar_t *current_buffer=0;
static int current_cursor_pos = -1;
/**
Returns the current commandline buffer.
*/
static wchar_t *get_buffer()
{
return current_buffer;
}
/**
Returns the position of the cursor
*/
static int get_cursor_pos()
{
return current_cursor_pos;
}
/**
Replace/append/insert the selection with/at/after the specified string.
\param begin beginning of selection
\param end end of selection
\param insert the string to insert
\param append_mode can be one of REPLACE_MODE, INSERT_MODE or APPEND_MODE, affects the way the test update is performed
*/
static void replace_part( const wchar_t *begin,
const wchar_t *end,
wchar_t *insert,
int append_mode )
{
const wchar_t *buff = get_buffer();
string_buffer_t out;
int out_pos=get_cursor_pos();
sb_init( &out );
sb_append_substring( &out, buff, begin-buff );
switch( append_mode)
{
case REPLACE_MODE:
{
sb_append( &out, insert );
out_pos = wcslen( insert ) + (begin-buff);
break;
}
case APPEND_MODE:
{
sb_append_substring( &out, begin, end-begin );
sb_append( &out, insert );
break;
}
case INSERT_MODE:
{
int cursor = get_cursor_pos() -(begin-buff);
sb_append_substring( &out, begin, cursor );
sb_append( &out, insert );
sb_append_substring( &out, begin+cursor, end-begin-cursor );
out_pos += wcslen( insert );
break;
}
}
sb_append( &out, end );
reader_set_buffer( (wchar_t *)out.buff, out_pos );
sb_destroy( &out );
}
/**
Output the specified selection.
\param begin start of selection
\param end end of selection
\param cut_at_cursor whether printing should stop at the surrent cursor position
\param tokenize whether the string should be tokenized, printing one string token on every line and skipping non-string tokens
*/
static void write_part( const wchar_t *begin,
const wchar_t *end,
int cut_at_cursor,
int tokenize )
{
tokenizer tok;
string_buffer_t out;
wchar_t *buff;
int pos;
pos = get_cursor_pos()-(begin-get_buffer());
if( tokenize )
{
buff = wcsndup( begin, end-begin );
// fwprintf( stderr, L"Subshell: %ls, end char %lc\n", buff, *end );
sb_init( &out );
for( tok_init( &tok, buff, TOK_ACCEPT_UNFINISHED );
tok_has_next( &tok );
tok_next( &tok ) )
{
if( (cut_at_cursor) &&
(tok_get_pos( &tok)+wcslen(tok_last( &tok)) >= pos) )
break;
switch( tok_last_type( &tok ) )
{
case TOK_STRING:
{
wchar_t *tmp = unescape( tok_last( &tok ), UNESCAPE_INCOMPLETE );
sb_append2( &out, tmp, L"\n", (void *)0 );
free( tmp );
break;
}
}
}
sb_append( sb_out,
(wchar_t *)out.buff );
free( buff );
tok_destroy( &tok );
sb_destroy( &out );
}
else
{
wchar_t *buff, *esc;
if( cut_at_cursor )
{
end = begin+pos;
}
buff = wcsndup( begin, end-begin );
esc = unescape( buff, UNESCAPE_INCOMPLETE );
// debug( 0, L"woot2 %ls -> %ls", buff, esc );
sb_append( sb_out, esc );
sb_append( sb_out, L"\n" );
free( esc );
free( buff );
}
}
/**
The commandline builtin. It is used for specifying a new value for
the commandline.
*/
static int builtin_commandline( wchar_t **argv )
{
int buffer_part=0;
int cut_at_cursor=0;
int argc = builtin_count_args( argv );
int append_mode=0;
int function_mode = 0;
int tokenize = 0;
int cursor_mode = 0;
int line_mode = 0;
int search_mode = 0;
wchar_t *begin, *end;
current_buffer = (wchar_t *)builtin_complete_get_temporary_buffer();
if( current_buffer )
{
current_cursor_pos = wcslen( current_buffer );
}
else
{
current_buffer = reader_get_buffer();
current_cursor_pos = reader_get_cursor_pos();
}
if( !get_buffer() )
{
if (is_interactive_session)
{
/*
Prompt change requested while we don't have
a prompt, most probably while reading the
init files. Just ignore it.
*/
return 1;
}
sb_append2( sb_err,
argv[0],
L": Can not set commandline in non-interactive mode\n",
(void *)0 );
builtin_print_help( argv[0], sb_err );
return 1;
}
woptind=0;
while( 1 )
{
const static struct woption
long_options[] =
{
{
L"append", no_argument, 0, 'a'
}
,
{
L"insert", no_argument, 0, 'i'
}
,
{
L"replace", no_argument, 0, 'r'
}
,
{
L"current-job", no_argument, 0, 'j'
}
,
{
L"current-process", no_argument, 0, 'p'
}
,
{
L"current-token", no_argument, 0, 't'
}
,
{
L"current-buffer", no_argument, 0, 'b'
}
,
{
L"cut-at-cursor", no_argument, 0, 'c'
}
,
{
L"function", no_argument, 0, 'f'
}
,
{
L"tokenize", no_argument, 0, 'o'
}
,
{
L"help", no_argument, 0, 'h'
}
,
{
L"input", required_argument, 0, 'I'
}
,
{
L"cursor", no_argument, 0, 'C'
}
,
{
L"line", no_argument, 0, 'L'
}
,
{
L"search-mode", no_argument, 0, 'S'
}
,
{
0, 0, 0, 0
}
}
;
int opt_index = 0;
int opt = wgetopt_long( argc,
argv,
L"abijpctwforhI:CLS",
long_options,
&opt_index );
if( opt == -1 )
break;
switch( opt )
{
case 0:
if(long_options[opt_index].flag != 0)
break;
sb_printf( sb_err,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name );
builtin_print_help( argv[0], sb_err );
return 1;
case L'a':
append_mode = APPEND_MODE;
break;
case L'b':
buffer_part = STRING_MODE;
break;
case L'i':
append_mode = INSERT_MODE;
break;
case L'r':
append_mode = REPLACE_MODE;
break;
case 'c':
cut_at_cursor=1;
break;
case 't':
buffer_part = TOKEN_MODE;
break;
case 'j':
buffer_part = JOB_MODE;
break;
case 'p':
buffer_part = PROCESS_MODE;
break;
case 'f':
function_mode=1;
break;
case 'o':
tokenize=1;
break;
case 'I':
current_buffer = woptarg;
current_cursor_pos = wcslen( woptarg );
break;
case 'C':
cursor_mode = 1;
break;
case 'L':
line_mode = 1;
break;
case 'S':
search_mode = 1;
break;
case 'h':
builtin_print_help( argv[0], sb_out );
return 0;
case L'?':
builtin_unknown_option( argv[0], argv[woptind-1] );
return 1;
}
}
if( function_mode )
{
int i;
/*
Check for invalid switch combinations
*/
if( buffer_part || cut_at_cursor || append_mode || tokenize || cursor_mode || line_mode || search_mode )
{
sb_printf(sb_err,
BUILTIN_ERR_COMBO,
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( argc == woptind )
{
sb_printf( sb_err,
BUILTIN_ERR_MISSING,
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
for( i=woptind; i<argc; i++ )
{
wint_t c = input_get_code( argv[i] );
if( c != -1 )
{
/*
input_unreadch inserts the specified keypress or
readline function at the top of the stack of unused
keypresses
*/
input_unreadch(c);
}
else
{
sb_printf( sb_err,
_(L"%ls: Unknown readline function '%ls'\n"),
argv[0],
argv[i] );
builtin_print_help( argv[0], sb_err );
return 1;
}
}
return 0;
}
/*
Check for invalid switch combinations
*/
if( (search_mode || line_mode || cursor_mode) && (argc-woptind > 1) )
{
sb_append2( sb_err,
argv[0],
L": Too many arguments\n",
(void *)0 );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( (buffer_part || tokenize || cut_at_cursor) && (cursor_mode || line_mode || search_mode) )
{
sb_printf( sb_err,
BUILTIN_ERR_COMBO,
argv[0] );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( (tokenize || cut_at_cursor) && (argc-woptind) )
{
sb_printf( sb_err,
BUILTIN_ERR_COMBO2,
argv[0],
L"--cut-at-cursor and --tokenize can not be used when setting the commandline" );
builtin_print_help( argv[0], sb_err );
return 1;
}
if( append_mode && !(argc-woptind) )
{
sb_printf( sb_err,
BUILTIN_ERR_COMBO2,
argv[0],
L"insertion mode switches can not be used when not in insertion mode" );
builtin_print_help( argv[0], sb_err );
return 1;
}
/*
Set default modes
*/
if( !append_mode )
{
append_mode = REPLACE_MODE;
}
if( !buffer_part )
{
buffer_part = STRING_MODE;
}
if( cursor_mode )
{
if( argc-woptind )
{
wchar_t *endptr;
int new_pos;
errno = 0;
new_pos = wcstol( argv[woptind], &endptr, 10 );
if( *endptr || errno )
{
sb_printf( sb_err,
BUILTIN_ERR_NOT_NUMBER,
argv[0],
argv[woptind] );
builtin_print_help( argv[0], sb_err );
}
current_buffer = reader_get_buffer();
new_pos = maxi( 0, mini( new_pos, wcslen( current_buffer ) ) );
reader_set_buffer( current_buffer, new_pos );
return 0;
}
else
{
sb_printf( sb_out, L"%d\n", reader_get_cursor_pos() );
return 0;
}
}
if( line_mode )
{
int pos = reader_get_cursor_pos();
wchar_t *buff = reader_get_buffer();
sb_printf( sb_out, L"%d\n", parse_util_lineno( buff, pos ) );
return 0;
}
if( search_mode )
{
return !reader_search_mode();
}
switch( buffer_part )
{
case STRING_MODE:
{
begin = get_buffer();
end = begin+wcslen(begin);
break;
}
case PROCESS_MODE:
{
parse_util_process_extent( get_buffer(),
get_cursor_pos(),
&begin,
&end );
break;
}
case JOB_MODE:
{
parse_util_job_extent( get_buffer(),
get_cursor_pos(),
&begin,
&end );
break;
}
case TOKEN_MODE:
{
parse_util_token_extent( get_buffer(),
get_cursor_pos(),
&begin,
&end,
0, 0 );
break;
}
}
switch(argc-woptind)
{
case 0:
{
write_part( begin, end, cut_at_cursor, tokenize );
break;
}
case 1:
{
replace_part( begin, end, argv[woptind], append_mode );
break;
}
default:
{
string_buffer_t sb;
int i;
sb_init( &sb );
sb_append( &sb, argv[woptind] );
for( i=woptind+1; i<argc; i++ )
{
sb_append( &sb, L"\n" );
sb_append( &sb, argv[i] );
}
replace_part( begin, end, (wchar_t *)sb.buff, append_mode );
sb_destroy( &sb );
break;
}
}
return 0;
}
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