Sandbox::https://github.com/pullreq/fish-shell/blob/builtin-curses-and-terminfo/input.cpp

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/** \file input.c

Functions for reading a character of input from stdin.

#include "config.h"

#include <stdlib.h>

#include <stdio.h>

#include <assert.h>

#include <string.h>

#include <errno.h>

#include <termios.h>

#include <sys/types.h>

#include <sys/stat.h>

#ifdef HAVE_SYS_IOCTL_H

#include <sys/ioctl.h>

#endif

#include <unistd.h>

#include <wchar.h>

#if HAVE_NCURSES_H

#include <ncurses.h>

#else

#include <curses.h>

#endif

#if HAVE_TERM_H

#include <term.h>

#elif HAVE_NCURSES_TERM_H

#include <ncurses/term.h>

#endif

#include <signal.h>

#include <dirent.h>

#include <wctype.h>

#include "fallback.h"

#include "util.h"

#include "wutil.h"

#include "reader.h"

#include "proc.h"

#include "common.h"

#include "sanity.h"

#include "input_common.h"

#include "input.h"

#include "parser.h"

#include "env.h"

#include "expand.h"

#include "event.h"

#include "signal.h"

#include "output.h"

#include "intern.h"

#include <vector>

#define DEFAULT_TERM L"ansi"

/**

Struct representing a keybinding. Returned by input_get_mappings.

struct input_mapping_t

{

wcstring seq; /**< Character sequence which generates this event */

wcstring command; /**< command that should be evaluated by this mapping */

input_mapping_t(const wcstring &s, const wcstring &c) : seq(s), command(c) {}

};

/**

A struct representing the mapping from a terminfo key name to a terminfo character sequence

struct terminfo_mapping_t

{

const wchar_t *name; /**< Name of key */

const char *seq; /**< Character sequence generated on keypress. Constant string. */

};

/**

Names of all the input functions supported

static const wchar_t * const name_arr[] =

{

L"beginning-of-line",

L"end-of-line",

L"forward-char",

L"backward-char",

L"forward-word",

L"backward-word",

L"history-search-backward",

L"history-search-forward",

L"delete-char",

L"backward-delete-char",

L"kill-line",

L"yank",

L"yank-pop",

L"complete",

L"complete-and-search",

L"beginning-of-history",

L"end-of-history",

L"backward-kill-line",

L"kill-whole-line",

L"kill-word",

L"backward-kill-word",

L"backward-kill-path-component",

L"history-token-search-backward",

L"history-token-search-forward",

L"self-insert",

L"transpose-chars",

L"transpose-words",

L"upcase-word",

L"downcase-word",

L"capitalize-word",

L"vi-arg-digit",

L"vi-delete-to",

L"execute",

L"beginning-of-buffer",

L"end-of-buffer",

L"repaint",

L"up-line",

L"down-line",

L"suppress-autosuggestion",

L"accept-autosuggestion",

L"cancel"

};

wcstring describe_char(wchar_t c)

{

wchar_t initial_cmd_char = R_BEGINNING_OF_LINE;

size_t name_count = sizeof name_arr / sizeof *name_arr;

if (c >= initial_cmd_char && c < initial_cmd_char + name_count)

{

return format_string(L"%02x (%ls)", c, name_arr[c - initial_cmd_char]);

}

return format_string(L"%02x", c);

}

/**

Description of each supported input function

static const wchar_t *desc_arr[] =

{

L"Move to beginning of line",

L"Move to end of line",

L"Move forward one character",

L"Move backward one character",

L"Move forward one word",

L"Move backward one word",

L"Search backward through list of previous commands",

L"Search forward through list of previous commands",

L"Delete one character forward",

L"Delete one character backward",

L"Move contents from cursor to end of line to killring",

L"Paste contents of killring",

L"Rotate to previous killring entry",

L"Guess the rest of the next input token",

L"Move to first item of history",

L"Move to last item of history",

L"Clear current line",

L"Move contents from beginning of line to cursor to killring",

L"Move entire line to killring",

L"Move next word to killring",

L"Move previous word to killring",

L"Write out key bindings",

L"Clear entire screen",

L"Quit the running program",

L"Search backward through list of previous commands for matching token",

L"Search forward through list of previous commands for matching token",

L"Insert the pressed key",

L"Do nothing",

L"End of file",

L"Repeat command"

}

;

/**

Internal code for each supported input function

static const wchar_t code_arr[] =

{

R_BEGINNING_OF_LINE,

R_END_OF_LINE,

R_FORWARD_CHAR,

R_BACKWARD_CHAR,

R_FORWARD_WORD,

R_BACKWARD_WORD,

R_HISTORY_SEARCH_BACKWARD,

R_HISTORY_SEARCH_FORWARD,

R_DELETE_CHAR,

R_BACKWARD_DELETE_CHAR,

R_KILL_LINE,

R_YANK,

R_YANK_POP,

R_COMPLETE,

R_COMPLETE_AND_SEARCH,

R_BEGINNING_OF_HISTORY,

R_END_OF_HISTORY,

R_BACKWARD_KILL_LINE,

R_KILL_WHOLE_LINE,

R_KILL_WORD,

R_BACKWARD_KILL_WORD,

R_BACKWARD_KILL_PATH_COMPONENT,

R_HISTORY_TOKEN_SEARCH_BACKWARD,

R_HISTORY_TOKEN_SEARCH_FORWARD,

R_SELF_INSERT,

R_TRANSPOSE_CHARS,

R_TRANSPOSE_WORDS,

R_UPCASE_WORD,

R_DOWNCASE_WORD,

R_CAPITALIZE_WORD,

R_VI_ARG_DIGIT,

R_VI_DELETE_TO,

R_EXECUTE,

R_BEGINNING_OF_BUFFER,

R_END_OF_BUFFER,

R_REPAINT,

R_UP_LINE,

R_DOWN_LINE,

R_SUPPRESS_AUTOSUGGESTION,

R_ACCEPT_AUTOSUGGESTION,

R_CANCEL

};

/** Mappings for the current input mode */

static std::vector<input_mapping_t> mapping_list;

/* Terminfo map list */

static std::vector<terminfo_mapping_t> terminfo_mappings;

#define TERMINFO_ADD(key) { (L ## #key) + 4, key }

/**

List of all terminfo mappings

static std::vector<terminfo_mapping_t> mappings;

/**

Set to one when the input subsytem has been initialized.

static bool is_init = false;

/**

Initialize terminfo.

static void input_terminfo_init();

/**

Returns the function description for the given function code.

void input_mapping_add(const wchar_t *sequence, const wchar_t *command)

{

CHECK(sequence,);

CHECK(command,);

// debug( 0, L"Add mapping from %ls to %ls", escape(sequence, 1), escape(command, 1 ) );

for (size_t i=0; i<mapping_list.size(); i++)

{

input_mapping_t &m = mapping_list.at(i);

if (m.seq == sequence)

{

m.command = command;

return;

}

mapping_list.push_back(input_mapping_t(sequence, command));

}

/**

Handle interruptions to key reading by reaping finshed jobs and

propagating the interrupt to the reader.

static int interrupt_handler()

{

Fire any pending events

event_fire(NULL);

Reap stray processes, including printing exit status messages

if (job_reap(1))

reader_repaint_needed();

Tell the reader an event occured

if (reader_reading_interrupted())

{

Return 3, i.e. the character read by a Control-C.

return 3;

}

return R_NULL;

}

void update_fish_term256(void)

{

/* Infer term256 support. If fish_term256 is set, we respect it; otherwise try to detect it from the TERM variable */

env_var_t fish_term256 = env_get_string(L"fish_term256");

bool support_term256;

if (! fish_term256.missing_or_empty())

{

support_term256 = from_string<bool>(fish_term256);

}

else

{

env_var_t term = env_get_string(L"TERM");

if (term.missing())

{

support_term256 = false;

}

else if (term.find(L"256color") != wcstring::npos)

{

/* Explicitly supported */

support_term256 = true;

}

else if (term.find(L"xterm") != wcstring::npos)

{

// assume that all xterms are 256, except for OS X SnowLeopard

env_var_t prog = env_get_string(L"TERM_PROGRAM");

support_term256 = (prog != L"Apple_Terminal");

}

else

{

// Don't know, default to false

support_term256 = false;

}

output_set_supports_term256(support_term256);

}

int input_init()

{

if (is_init)

return 1;

is_init = true;

input_common_init(&interrupt_handler);

const env_var_t term = env_get_string(L"TERM");

int errret;

if (setupterm(0, STDOUT_FILENO, &errret) == ERR)

{

debug(0, _(L"Could not set up terminal"));

if (errret == 0)

{

debug(0, _(L"Check that your terminal type, '%ls', is supported on this system"),

term.c_str());

debug(0, _(L"Attempting to use '%ls' instead"), DEFAULT_TERM);

env_set(L"TERM", DEFAULT_TERM, ENV_GLOBAL | ENV_EXPORT);

const std::string default_term = wcs2string(DEFAULT_TERM);

if (setupterm(const_cast<char *>(default_term.c_str()), STDOUT_FILENO, &errret) == ERR)

{

debug(0, _(L"Could not set up terminal"));

exit_without_destructors(1);

}

else

{

exit_without_destructors(1);

}

assert(! term.missing());

output_set_term(term);

input_terminfo_init();

update_fish_term256();

/* If we have no keybindings, add a few simple defaults */

if (mapping_list.empty())

{

input_mapping_add(L"", L"self-insert");

input_mapping_add(L"\n", L"execute");

input_mapping_add(L"\t", L"complete");

input_mapping_add(L"\x3", L"commandline \"\"");

input_mapping_add(L"\x4", L"exit");

input_mapping_add(L"\x5", L"bind");

}

return 1;

}

void input_destroy()

{

if (!is_init)

return;

is_init = false;

input_common_destroy();

if (fish_del_curterm(cur_term) == ERR)

{

debug(0, _(L"Error while closing terminfo"));

}

/**

Perform the action of the specified binding

static wint_t input_exec_binding(const input_mapping_t &m, const wcstring &seq)

{

wchar_t code = input_function_get_code(m.command);

if (code != (wchar_t)-1)

{

switch (code)

{

case R_SELF_INSERT:

{

return seq[0];

}

default:

{

return code;

}

else

{

This key sequence is bound to a command, which

is sent to the parser for evaluation.

int last_status = proc_get_last_status();

parser_t::principal_parser().eval(m.command.c_str(), io_chain_t(), TOP);

proc_set_last_status(last_status);

We still need to return something to the caller, R_NULL

tells the reader that no key press needs to be handled,

and no repaint is needed.

Bindings that produce output should emit a R_REPAINT

function by calling 'commandline -f repaint' to tell

fish that a repaint is in order.

return R_NULL;

}

/**

Try reading the specified function mapping

static wint_t input_try_mapping(const input_mapping_t &m)

{

wint_t c=0;

int j;

Check if the actual function code of this mapping is on the stack

c = input_common_readch(0);

if (c == input_function_get_code(m.command))

{

return input_exec_binding(m, m.seq);

}

input_unreadch(c);

const wchar_t *str = m.seq.c_str();

for (j=0; str[j] != L'\0'; j++)

{

bool timed = (j > 0);

c = input_common_readch(timed);

if (str[j] != c)

break;

}

if (str[j] == L'\0')

{

/* We matched the entire sequence */

return input_exec_binding(m, m.seq);

}

else

{

int k;

Return the read characters

input_unreadch(c);

for (k=j-1; k>=0; k--)

{

input_unreadch(m.seq[k]);

}

return 0;

}

void input_unreadch(wint_t ch)

{

input_common_unreadch(ch);

}

wint_t input_readch()

{

size_t i;

CHECK_BLOCK(R_NULL);

Clear the interrupted flag

reader_reset_interrupted();

Search for sequence in mapping tables

while (1)

{

const input_mapping_t *generic = 0;

for (i=0; i<mapping_list.size(); i++)

{

const input_mapping_t &m = mapping_list.at(i);

wint_t res = input_try_mapping(m);

if (res)

return res;

if (m.seq.length() == 0)

{

generic = &m;

}

No matching exact mapping, try to find generic mapping.

if (generic)

{

wchar_t arr[2]=

{

}

;

arr[0] = input_common_readch(0);

return input_exec_binding(*generic, arr);

}

No action to take on specified character, ignore it

and move to next one.

wchar_t c = input_common_readch(0);

/* If it's closed, then just return */

if (c == R_EOF)

{

return WEOF;

}

void input_mapping_get_names(wcstring_list_t &lst)

{

size_t i;

for (i=0; i<mapping_list.size(); i++)

{

const input_mapping_t &m = mapping_list.at(i);

lst.push_back(wcstring(m.seq));

}

bool input_mapping_erase(const wchar_t *sequence)

{

ASSERT_IS_MAIN_THREAD();

bool result = false;

size_t i, sz = mapping_list.size();

for (i=0; i<sz; i++)

{

const input_mapping_t &m = mapping_list.at(i);

if (sequence == m.seq)

{

if (i != (sz-1))

{

mapping_list[i] = mapping_list[sz-1];

}

mapping_list.pop_back();

result = true;

break;

}

return result;

}

bool input_mapping_get(const wcstring &sequence, wcstring &cmd)

{

size_t i, sz = mapping_list.size();

for (i=0; i<sz; i++)

{

const input_mapping_t &m = mapping_list.at(i);

if (sequence == m.seq)

{

cmd = m.command;

return true;

}

return false;

}

/**

Add all terminfo mappings

static void input_terminfo_init()

{

const terminfo_mapping_t tinfos[] =

{

TERMINFO_ADD(key_a1),

TERMINFO_ADD(key_a3),

TERMINFO_ADD(key_b2),

TERMINFO_ADD(key_backspace),

TERMINFO_ADD(key_beg),

TERMINFO_ADD(key_btab),

TERMINFO_ADD(key_c1),

TERMINFO_ADD(key_c3),

TERMINFO_ADD(key_cancel),

TERMINFO_ADD(key_catab),

TERMINFO_ADD(key_clear),

TERMINFO_ADD(key_close),

TERMINFO_ADD(key_command),

TERMINFO_ADD(key_copy),

TERMINFO_ADD(key_create),

TERMINFO_ADD(key_ctab),

TERMINFO_ADD(key_dc),

TERMINFO_ADD(key_dl),

TERMINFO_ADD(key_down),

TERMINFO_ADD(key_eic),

TERMINFO_ADD(key_end),

TERMINFO_ADD(key_enter),

TERMINFO_ADD(key_eol),

TERMINFO_ADD(key_eos),

TERMINFO_ADD(key_exit),

TERMINFO_ADD(key_f0),

TERMINFO_ADD(key_f1),

TERMINFO_ADD(key_f2),

TERMINFO_ADD(key_f3),

TERMINFO_ADD(key_f4),

TERMINFO_ADD(key_f5),

TERMINFO_ADD(key_f6),

TERMINFO_ADD(key_f7),

TERMINFO_ADD(key_f8),

TERMINFO_ADD(key_f9),

TERMINFO_ADD(key_f10),

TERMINFO_ADD(key_f11),

TERMINFO_ADD(key_f12),

TERMINFO_ADD(key_f13),

TERMINFO_ADD(key_f14),

TERMINFO_ADD(key_f15),

TERMINFO_ADD(key_f16),

TERMINFO_ADD(key_f17),

TERMINFO_ADD(key_f18),

TERMINFO_ADD(key_f19),

TERMINFO_ADD(key_f20),

I know of no keyboard with more than 20 function keys, so

adding the rest here makes very little sense, since it will

take up a lot of room in any listings (like tab completions),

but with no benefit.

TERMINFO_ADD(key_f21),

TERMINFO_ADD(key_f22),

TERMINFO_ADD(key_f23),

TERMINFO_ADD(key_f24),

TERMINFO_ADD(key_f25),

TERMINFO_ADD(key_f26),

TERMINFO_ADD(key_f27),

TERMINFO_ADD(key_f28),

TERMINFO_ADD(key_f29),

TERMINFO_ADD(key_f30),

TERMINFO_ADD(key_f31),

TERMINFO_ADD(key_f32),

TERMINFO_ADD(key_f33),

TERMINFO_ADD(key_f34),

TERMINFO_ADD(key_f35),

TERMINFO_ADD(key_f36),

TERMINFO_ADD(key_f37),

TERMINFO_ADD(key_f38),

TERMINFO_ADD(key_f39),

TERMINFO_ADD(key_f40),

TERMINFO_ADD(key_f41),

TERMINFO_ADD(key_f42),

TERMINFO_ADD(key_f43),

TERMINFO_ADD(key_f44),

TERMINFO_ADD(key_f45),

TERMINFO_ADD(key_f46),

TERMINFO_ADD(key_f47),

TERMINFO_ADD(key_f48),

TERMINFO_ADD(key_f49),

TERMINFO_ADD(key_f50),

TERMINFO_ADD(key_f51),

TERMINFO_ADD(key_f52),

TERMINFO_ADD(key_f53),

TERMINFO_ADD(key_f54),

TERMINFO_ADD(key_f55),

TERMINFO_ADD(key_f56),

TERMINFO_ADD(key_f57),

TERMINFO_ADD(key_f58),

TERMINFO_ADD(key_f59),

TERMINFO_ADD(key_f60),

TERMINFO_ADD(key_f61),

TERMINFO_ADD(key_f62),

TERMINFO_ADD(key_f63),*/

TERMINFO_ADD(key_find),

TERMINFO_ADD(key_help),

TERMINFO_ADD(key_home),

TERMINFO_ADD(key_ic),

TERMINFO_ADD(key_il),

TERMINFO_ADD(key_left),

TERMINFO_ADD(key_ll),

TERMINFO_ADD(key_mark),

TERMINFO_ADD(key_message),

TERMINFO_ADD(key_move),

TERMINFO_ADD(key_next),

TERMINFO_ADD(key_npage),

TERMINFO_ADD(key_open),

TERMINFO_ADD(key_options),

TERMINFO_ADD(key_ppage),

TERMINFO_ADD(key_previous),

TERMINFO_ADD(key_print),

TERMINFO_ADD(key_redo),

TERMINFO_ADD(key_reference),

TERMINFO_ADD(key_refresh),

TERMINFO_ADD(key_replace),

TERMINFO_ADD(key_restart),

TERMINFO_ADD(key_resume),

TERMINFO_ADD(key_right),

TERMINFO_ADD(key_save),

TERMINFO_ADD(key_sbeg),

TERMINFO_ADD(key_scancel),

TERMINFO_ADD(key_scommand),

TERMINFO_ADD(key_scopy),

TERMINFO_ADD(key_screate),

TERMINFO_ADD(key_sdc),

TERMINFO_ADD(key_sdl),

TERMINFO_ADD(key_select),

TERMINFO_ADD(key_send),

TERMINFO_ADD(key_seol),

TERMINFO_ADD(key_sexit),

TERMINFO_ADD(key_sf),

TERMINFO_ADD(key_sfind),

TERMINFO_ADD(key_shelp),

TERMINFO_ADD(key_shome),

TERMINFO_ADD(key_sic),

TERMINFO_ADD(key_sleft),

TERMINFO_ADD(key_smessage),

TERMINFO_ADD(key_smove),

TERMINFO_ADD(key_snext),

TERMINFO_ADD(key_soptions),

TERMINFO_ADD(key_sprevious),

TERMINFO_ADD(key_sprint),

TERMINFO_ADD(key_sr),

TERMINFO_ADD(key_sredo),

TERMINFO_ADD(key_sreplace),

TERMINFO_ADD(key_sright),

TERMINFO_ADD(key_srsume),

TERMINFO_ADD(key_ssave),

TERMINFO_ADD(key_ssuspend),

TERMINFO_ADD(key_stab),

TERMINFO_ADD(key_sundo),

TERMINFO_ADD(key_suspend),

TERMINFO_ADD(key_undo),

TERMINFO_ADD(key_up)

};

const size_t count = sizeof tinfos / sizeof *tinfos;

terminfo_mappings.reserve(terminfo_mappings.size() + count);

terminfo_mappings.insert(terminfo_mappings.end(), tinfos, tinfos + count);

}

bool input_terminfo_get_sequence(const wchar_t *name, wcstring *out_seq)

{

ASSERT_IS_MAIN_THREAD();

const char *res = 0;

int err = ENOENT;

CHECK(name, 0);

input_init();

for (size_t i=0; i<terminfo_mappings.size(); i++)

{

const terminfo_mapping_t &m = terminfo_mappings.at(i);

if (!wcscmp(name, m.name))

{

res = m.seq;

err = EILSEQ;

break;

}

if (!res)

{

errno = err;

return false;

}

*out_seq = format_string(L"%s", res);

return true;

}

bool input_terminfo_get_name(const wcstring &seq, wcstring &name)

{

input_init();

for (size_t i=0; i<terminfo_mappings.size(); i++)

{

terminfo_mapping_t &m = terminfo_mappings.at(i);

if (!m.seq)

{

continue;

}

const wcstring map_buf = format_string(L"%s", m.seq);

if (map_buf == seq)

{

name = m.name;

return true;

}

return false;

}

wcstring_list_t input_terminfo_get_names(bool skip_null)

{

wcstring_list_t result;

result.reserve(terminfo_mappings.size());

input_init();

for (size_t i=0; i<terminfo_mappings.size(); i++)

{

terminfo_mapping_t &m = terminfo_mappings.at(i);

if (skip_null && !m.seq)

{

continue;

}

result.push_back(wcstring(m.name));

}

return result;

}

wcstring_list_t input_function_get_names(void)

{

size_t count = sizeof name_arr / sizeof *name_arr;

return wcstring_list_t(name_arr, name_arr + count);

}

wchar_t input_function_get_code(const wcstring &name)

{

size_t i;

for (i = 0; i<(sizeof(code_arr)/sizeof(wchar_t)) ; i++)

{

if (name == name_arr[i])

{

return code_arr[i];

}

return -1;

}

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