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Copy pathbuiltin_commandline.cpp
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605 lines (502 loc) · 14.8 KB
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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 */
}
;
/**
Pointer to what the commandline builtin considers to be the current
contents of the command line buffer.
*/
static const wchar_t *current_buffer=0;
/**
What the commandline builtin considers to be the current cursor
position.
*/
static size_t current_cursor_pos = (size_t)(-1);
/**
Returns the current commandline buffer.
*/
static const wchar_t *get_buffer()
{
return current_buffer;
}
/**
Returns the position of the cursor
*/
static size_t 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,
const wchar_t *insert,
int append_mode)
{
const wchar_t *buff = get_buffer();
size_t out_pos = get_cursor_pos();
wcstring out;
out.append(buff, begin - buff);
switch (append_mode)
{
case REPLACE_MODE:
{
out.append(insert);
out_pos = wcslen(insert) + (begin-buff);
break;
}
case APPEND_MODE:
{
out.append(begin, end-begin);
out.append(insert);
break;
}
case INSERT_MODE:
{
long cursor = get_cursor_pos() -(begin-buff);
out.append(begin, cursor);
out.append(insert);
out.append(begin+cursor, end-begin-cursor);
out_pos += wcslen(insert);
break;
}
}
out.append(end);
reader_set_buffer(out, out_pos);
}
/**
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)
{
size_t pos = get_cursor_pos()-(begin-get_buffer());
if (tokenize)
{
wchar_t *buff = wcsndup(begin, end-begin);
// fwprintf( stderr, L"Subshell: %ls, end char %lc\n", buff, *end );
wcstring out;
tokenizer_t tok(buff, TOK_ACCEPT_UNFINISHED);
for (; 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:
{
out.append(escape_string(tok_last(&tok), UNESCAPE_INCOMPLETE));
out.push_back(L'\n');
break;
}
default:
{
break;
}
}
}
stdout_buffer.append(out);
free(buff);
}
else
{
if (cut_at_cursor)
{
end = begin+pos;
}
// debug( 0, L"woot2 %ls -> %ls", buff, esc );
stdout_buffer.append(begin, end - begin);
stdout_buffer.append(L"\n");
}
}
/**
The commandline builtin. It is used for specifying a new value for
the commandline.
*/
static int builtin_commandline(parser_t &parser, 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;
int paging_mode = 0;
const 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;
}
stderr_buffer.append(argv[0]);
stderr_buffer.append(L": Can not set commandline in non-interactive mode\n");
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
woptind=0;
while (1)
{
static const 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' },
{ L"paging-mode", no_argument, 0, 'P' },
{ 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;
append_format(stderr_buffer,
BUILTIN_ERR_UNKNOWN,
argv[0],
long_options[opt_index].name);
builtin_print_help(parser, argv[0], stderr_buffer);
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 'P':
paging_mode = 1;
break;
case 'h':
builtin_print_help(parser, argv[0], stdout_buffer);
return 0;
case L'?':
builtin_unknown_option(parser, 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 || paging_mode)
{
append_format(stderr_buffer,
BUILTIN_ERR_COMBO,
argv[0]);
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
if (argc == woptind)
{
append_format(stderr_buffer,
BUILTIN_ERR_MISSING,
argv[0]);
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
for (i=woptind; i<argc; i++)
{
wchar_t c = input_function_get_code(argv[i]);
if (c != (wchar_t)(-1))
{
/*
input_unreadch inserts the specified keypress or
readline function at the top of the stack of unused
keypresses
*/
input_unreadch(c);
}
else
{
append_format(stderr_buffer,
_(L"%ls: Unknown input function '%ls'\n"),
argv[0],
argv[i]);
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
}
return 0;
}
/*
Check for invalid switch combinations
*/
if ((search_mode || line_mode || cursor_mode || paging_mode) && (argc-woptind > 1))
{
append_format(stderr_buffer,
argv[0],
L": Too many arguments\n",
NULL);
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
if ((buffer_part || tokenize || cut_at_cursor) && (cursor_mode || line_mode || search_mode || paging_mode))
{
append_format(stderr_buffer,
BUILTIN_ERR_COMBO,
argv[0]);
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
if ((tokenize || cut_at_cursor) && (argc-woptind))
{
append_format(stderr_buffer,
BUILTIN_ERR_COMBO2,
argv[0],
L"--cut-at-cursor and --tokenize can not be used when setting the commandline");
builtin_print_help(parser, argv[0], stderr_buffer);
return 1;
}
if (append_mode && !(argc-woptind))
{
append_format(stderr_buffer,
BUILTIN_ERR_COMBO2,
argv[0],
L"insertion mode switches can not be used when not in insertion mode");
builtin_print_help(parser, argv[0], stderr_buffer);
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;
long new_pos;
errno = 0;
new_pos = wcstol(argv[woptind], &endptr, 10);
if (*endptr || errno)
{
append_format(stderr_buffer,
BUILTIN_ERR_NOT_NUMBER,
argv[0],
argv[woptind]);
builtin_print_help(parser, argv[0], stderr_buffer);
}
current_buffer = reader_get_buffer();
new_pos = maxi(0L, mini(new_pos, (long)wcslen(current_buffer)));
reader_set_buffer(current_buffer, (size_t)new_pos);
return 0;
}
else
{
append_format(stdout_buffer, L"%lu\n", (unsigned long)reader_get_cursor_pos());
return 0;
}
}
if (line_mode)
{
size_t pos = reader_get_cursor_pos();
const wchar_t *buff = reader_get_buffer();
append_format(stdout_buffer, L"%lu\n", (unsigned long)parse_util_lineno(buff, pos));
return 0;
}
if (search_mode)
{
return ! reader_search_mode();
}
if (paging_mode)
{
return ! reader_has_pager_contents();
}
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:
{
wcstring sb = argv[woptind];
int i;
for (i=woptind+1; i<argc; i++)
{
sb.push_back(L'\n');
sb.append(argv[i]);
}
replace_part(begin, end, sb.c_str(), append_mode);
break;
}
}
return 0;
}