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elinks/src/terminal/terminal.cpp
Witold Filipczyk 361b8f661d [long] long -> intptr_t . Refs #8304
AFAIK on Windows long is sizeof 4, while void * is sizeof 8.
intptr_t is the same sizeof as void *.
2022-08-17 20:48:58 +02:00

511 lines
11 KiB
C++

/** Terminal interface - low-level displaying implementation.
* @file */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "elinks.h"
#include "bookmarks/bookmarks.h"
#include "config/options.h"
#include "main/main.h"
#include "main/module.h"
#include "main/object.h"
#include "main/select.h"
#include "osdep/osdep.h"
#include "osdep/signals.h"
#ifdef CONFIG_SCRIPTING_SPIDERMONKEY
# include "scripting/smjs/smjs.h"
#endif
#include "session/session.h"
#include "terminal/draw.h"
#include "terminal/event.h"
#include "terminal/hardio.h"
#include "terminal/kbd.h"
#include "terminal/screen.h"
#include "terminal/terminal.h"
#ifdef CONFIG_TERMINFO
#include "terminal/terminfo.h"
#endif
#include "terminal/window.h"
#include "util/error.h"
#include "util/memory.h"
#include "util/string.h"
#include "viewer/text/textarea.h"
INIT_LIST_OF(struct terminal, terminals);
static void check_if_no_terminal(void);
void
redraw_terminal(struct terminal *term)
{
struct term_event ev;
set_redraw_term_event(&ev, term->width, term->height);
term_send_event(term, &ev);
}
void
redraw_terminal_cls(struct terminal *term)
{
struct term_event ev;
set_resize_term_event(&ev, term->width, term->height);
term_send_event(term, &ev);
}
void
cls_redraw_all_terminals(void)
{
static int in_redraw;
struct terminal *term;
if (in_redraw) return;
in_redraw = 1;
foreach (term, terminals)
redraw_terminal_cls(term);
in_redraw = 0;
}
/** Get the terminal in which message boxes should be displayed, if
* there is no specific reason to use some other terminal. This
* returns NULL if all terminals have been closed. (ELinks keeps
* running anyway if ui.sessions.keep_session_active is true.) */
struct terminal *
get_default_terminal(void)
{
if (list_empty(terminals))
return NULL;
else
return (struct terminal *)terminals.next;
}
struct terminal *
init_term(int fdin, int fdout)
{
char name[MAX_TERM_LEN + 9] = "terminal.";
struct terminal *term = (struct terminal *)mem_calloc(1, sizeof(*term));
if (!term) {
check_if_no_terminal();
return NULL;
}
term->screen = init_screen();
if (!term->screen) {
mem_free(term);
return NULL;
}
#ifdef CONFIG_TERMINFO
terminfo_setupterm(NULL, fdout);
#endif
init_list(term->windows);
term->fdin = fdin;
term->fdout = fdout;
term->master = (term->fdout == get_output_handle());
term->blocked = -1;
get_terminal_name(name + 9);
term->spec = get_opt_rec(config_options, name);
object_lock(term->spec);
/* It's a new terminal, so assume the user is using it right now,
* and sort it to the front of the list. */
add_to_list(terminals, term);
set_handlers(fdin, (select_handler_T) in_term, NULL,
(select_handler_T) destroy_terminal, term);
return term;
}
/** Get the codepage of a terminal. The UTF-8 I/O option does not
* affect this.
*
* @todo Perhaps cache the value in struct terminal?
*
* @bug Bug 1064: If the charset has been set as "System", this should
* apply the locale environment variables of the slave ELinks process,
* not those of the master ELinks process that parsed the configuration
* file. That is why the parameter points to struct terminal and not
* merely to its option tree (term->spec).
*
* @see get_translation_table(), get_cp_mime_name() */
int
get_terminal_codepage(const struct terminal *term)
{
return get_opt_codepage_tree(term->spec, "charset", NULL);
}
void
redraw_all_terminals(void)
{
struct terminal *term;
foreach (term, terminals)
redraw_screen(term);
}
void
destroy_terminal(struct terminal *term)
{
#ifdef CONFIG_SCRIPTING_SPIDERMONKEY
smjs_detach_terminal_object(term);
#endif
#ifdef CONFIG_BOOKMARKS
bookmark_auto_save_tabs(term);
#endif
detach_downloads_from_terminal(term);
free_textarea_data(term);
/* delete_window doesn't update term->current_tab, but it
calls redraw_terminal, which requires term->current_tab
to be valid if there are any tabs left. So set a value
that will be valid for that long. */
term->current_tab = 0;
while (!list_empty(term->windows))
delete_window((struct window *)term->windows.next);
/* mem_free_if(term->cwd); */
mem_free_if(term->title);
if (term->screen) done_screen(term->screen);
clear_handlers(term->fdin);
mem_free_if(term->interlink);
if (term->blocked != -1) {
close(term->blocked);
clear_handlers(term->blocked);
}
del_from_list(term);
close(term->fdin);
if (term->fdout != 1) {
if (term->fdout != term->fdin) close(term->fdout);
} else {
unhandle_terminal_signals(term);
free_all_itrms();
#ifndef NO_FORK_ON_EXIT
if (!list_empty(terminals)) {
if (fork()) exit(0);
}
#endif
}
object_unlock(term->spec);
mem_free(term);
check_if_no_terminal();
}
void
destroy_all_terminals(void)
{
while (!list_empty(terminals))
destroy_terminal((struct terminal *)terminals.next);
}
static void
check_if_no_terminal(void)
{
program.terminate = list_empty(terminals)
&& !get_opt_bool("ui.sessions.keep_session_active", NULL);
}
void
exec_thread(char *path, int p)
{
int plen = strlen(path + 1) + 2;
#if defined(HAVE_SETPGID) && !defined(CONFIG_OS_BEOS) && !defined(HAVE_BEGINTHREAD)
if (path[0] == TERM_EXEC_NEWWIN) setpgid(0, 0);
#endif
#ifndef WIN32
if (path[0] == TERM_EXEC_BG)
exe_no_stdin(path + 1);
else
exe(path + 1);
if (path[plen]) unlink(path + plen);
#endif
}
void
close_handle(void *h)
{
close((intptr_t) h);
clear_handlers((intptr_t) h);
}
static void
unblock_terminal(struct terminal *term)
{
close_handle((void *) (intptr_t) term->blocked);
term->blocked = -1;
set_handlers(term->fdin, (select_handler_T) in_term, NULL,
(select_handler_T) destroy_terminal, term);
unblock_itrm();
redraw_terminal_cls(term);
if (term->textarea_data) /* XXX */
textarea_edit(1, term, NULL, NULL, NULL);
}
#ifndef CONFIG_FASTMEM
void
assert_terminal_ptr_not_dangling(const struct terminal *suspect)
{
struct terminal *term;
if (suspect == NULL)
return;
foreach (term, terminals) {
if (term == suspect)
return;
}
assertm(0, "Dangling pointer to struct terminal");
}
#endif /* !CONFIG_FASTMEM */
static void
exec_on_master_terminal(struct terminal *term,
const char *path, int plen,
const char *delete_, int dlen,
term_exec_T fg)
{
int blockh;
int param_size = plen + dlen + 2 /* 2 null char */ + 1 /* fg */;
char *param = (char *)fmem_alloc(param_size);
if (!param) return;
param[0] = fg;
memcpy(param + 1, path, plen + 1);
memcpy(param + 1 + plen + 1, delete_, dlen + 1);
if (fg == TERM_EXEC_FG) block_itrm();
#ifndef WIN32
blockh = start_thread((void (*)(void *, int)) exec_thread,
param, param_size);
#else
exec_thread(param, param_size);
#endif
fmem_free(param);
if (blockh == -1) {
if (fg == TERM_EXEC_FG) unblock_itrm();
return;
}
if (fg == TERM_EXEC_FG) {
term->blocked = blockh;
set_handlers(blockh,
(select_handler_T) unblock_terminal,
NULL,
(select_handler_T) unblock_terminal,
term);
set_handlers(term->fdin, NULL, NULL,
(select_handler_T) destroy_terminal,
term);
} else {
set_handlers(blockh, close_handle, NULL,
close_handle, (void *) (intptr_t) blockh);
}
}
static void
exec_on_slave_terminal( struct terminal *term,
const char *path, int plen,
const char *delete_, int dlen,
term_exec_T fg)
{
int data_size = plen + dlen + 1 /* 0 */ + 1 /* fg */ + 2 /* 2 null char */;
char *data = (char *)fmem_alloc(data_size);
if (!data) return;
data[0] = 0;
data[1] = fg;
memcpy(data + 2, path, plen + 1);
memcpy(data + 2 + plen + 1, delete_, dlen + 1);
hard_write(term->fdout, data, data_size);
fmem_free(data);
}
void
exec_on_terminal(struct terminal *term, const char *path,
const char *delete_, term_exec_T fg)
{
if (path) {
if (!*path) return;
} else {
path = "";
}
#ifdef NO_FG_EXEC
fg = TERM_EXEC_BG;
#endif
if (term->master) {
if (!*path) {
dispatch_special(delete_);
return;
}
/* TODO: Should this be changed to allow TERM_EXEC_NEWWIN
* in a blocked terminal? There is similar code in
* in_sock(). --KON, 2007 */
if (fg != TERM_EXEC_BG && is_blocked()) {
unlink(delete_);
return;
}
exec_on_master_terminal(term,
path, strlen(path),
delete_, strlen(delete_),
fg);
} else {
exec_on_slave_terminal( term,
path, strlen(path),
delete_, strlen(delete_),
fg);
}
}
void
exec_shell(struct terminal *term)
{
const char *sh;
if (!can_open_os_shell(term->environment)) return;
sh = get_shell();
if (sh && *sh)
exec_on_terminal(term, sh, "", TERM_EXEC_FG);
}
void
do_terminal_function(struct terminal *term, unsigned char code,
const char *data)
{
int data_len = strlen(data);
char *x_data = (char *)fmem_alloc(data_len + 1 /* code */ + 1 /* null char */);
if (!x_data) return;
x_data[0] = code;
memcpy(x_data + 1, data, data_len + 1);
exec_on_terminal(term, NULL, x_data, TERM_EXEC_BG);
fmem_free(x_data);
}
/** @return negative on error; zero or positive on success. */
int
set_terminal_title(struct terminal *term, char *title)
{
int from_cp;
int to_cp;
char *converted = NULL;
if (term->title && !strcmp(title, term->title)) return 0;
/* In which codepage was the title parameter given? */
from_cp = get_terminal_codepage(term);
/* In which codepage does the terminal want the title? */
if (get_opt_bool_tree(term->spec, "latin1_title", NULL))
to_cp = get_cp_index("ISO-8859-1");
else if (get_opt_bool_tree(term->spec, "utf_8_io", NULL))
to_cp = get_cp_index("UTF-8");
else
to_cp = from_cp;
if (from_cp != to_cp) {
struct conv_table *convert_table;
convert_table = get_translation_table(from_cp, to_cp);
if (!convert_table) return -1;
converted = convert_string(convert_table, title, strlen(title),
to_cp, CSM_NONE, NULL, NULL, NULL);
if (!converted) return -1;
}
mem_free_set(&term->title, stracpy(title));
do_terminal_function(term, TERM_FN_TITLE_CODEPAGE,
get_cp_mime_name(to_cp));
do_terminal_function(term, TERM_FN_TITLE,
converted ? converted : title);
mem_free_if(converted);
return 0;
}
static int terminal_pipe[2];
int
check_terminal_pipes(void)
{
return c_pipe(terminal_pipe);
}
void
close_terminal_pipes(void)
{
close(terminal_pipe[0]);
close(terminal_pipe[1]);
}
struct terminal *
attach_terminal(int in, int out, int ctl, void *info, int len)
{
struct terminal *term;
if (set_nonblocking_fd(terminal_pipe[0]) < 0) return NULL;
if (set_nonblocking_fd(terminal_pipe[1]) < 0) return NULL;
handle_trm(in, out, out, terminal_pipe[1], ctl, info, len, 0);
term = init_term(terminal_pipe[0], out);
if (!term) {
close_terminal_pipes();
return NULL;
}
return term;
}
static struct module *terminal_submodules[] = {
&terminal_screen_module,
NULL
};
struct module terminal_module = struct_module(
/* Because this module is listed in main_modules rather than
* in builtin_modules, its name does not appear in the user
* interface and so need not be translatable. */
/* name: */ "Terminal",
/* options: */ NULL,
/* hooks: */ NULL,
/* submodules: */ terminal_submodules,
/* data: */ NULL,
/* init: */ NULL,
/* done: */ NULL
);