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elinks/src/terminal/terminal.c

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/* Terminal interface - low-level displaying implementation. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.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 "intl/gettext/libintl.h"
#include "main/main.h"
#include "main/object.h"
#include "main/select.h"
#include "osdep/osdep.h"
#include "osdep/signals.h"
#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"
#include "terminal/window.h"
#include "util/error.h"
#include "util/memory.h"
#include "util/string.h"
#include "viewer/text/textarea.h"
INIT_LIST_HEAD(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)
{
struct terminal *term;
foreach (term, terminals)
redraw_terminal_cls(term);
}
struct terminal *
init_term(int fdin, int fdout)
{
struct terminal *term = 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;
}
init_list(term->windows);
term->fdin = fdin;
term->fdout = fdout;
term->master = (term->fdout == get_output_handle());
term->blocked = -1;
term->spec = get_opt_rec(config_options, "terminal._template_");
object_lock(term->spec);
add_to_list(terminals, term);
set_handlers(fdin, (select_handler_T) in_term, NULL,
(select_handler_T) destroy_terminal, term);
return term;
}
void
redraw_all_terminals(void)
{
struct terminal *term;
foreach (term, terminals)
redraw_screen(term);
}
void
destroy_terminal(struct terminal *term)
{
#ifdef CONFIG_BOOKMARKS
bookmark_auto_save_tabs(term);
#endif
while (!list_empty(term->windows))
delete_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(terminals.next);
}
static void
check_if_no_terminal(void)
{
program.terminate = list_empty(terminals)
&& !get_opt_bool("ui.sessions.keep_session_active");
}
void
exec_thread(unsigned char *path, int p)
{
int plen = strlen(path + 1) + 2;
#if defined(HAVE_SETPGID) && !defined(CONFIG_BEOS) && !defined(HAVE_BEGINTHREAD)
if (path[0] == 2) setpgid(0, 0);
#endif
exe(path + 1);
if (path[plen]) unlink(path + plen);
}
void
close_handle(void *h)
{
close((long) h);
clear_handlers((long) h);
}
static void
unblock_terminal(struct terminal *term)
{
close_handle((void *) (long) term->blocked);
term->blocked = -1;
set_handlers(term->fdin, (select_handler_T) in_term, NULL,
(select_handler_T) destroy_terminal, term);
unblock_itrm(term->fdin);
redraw_terminal_cls(term);
if (textarea_editor) /* XXX */
textarea_edit(1, NULL, NULL, NULL, NULL);
}
static void
exec_on_master_terminal(struct terminal *term,
unsigned char *path, int plen,
unsigned char *delete, int dlen,
int fg)
{
int blockh;
unsigned char *param;
int param_size;
if (is_blocked() && fg) {
unlink(delete);
return;
}
param_size = plen + dlen + 2 /* 2 null char */ + 1 /* fg */;
param = mem_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 == 1) block_itrm(term->fdin);
blockh = start_thread((void (*)(void *, int)) exec_thread,
param, param_size);
if (blockh == -1) {
if (fg == 1) unblock_itrm(term->fdin);
mem_free(param);
return;
}
mem_free(param);
if (fg == 1) {
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);
/* block_itrm(term->fdin); */
} else {
set_handlers(blockh, close_handle, NULL,
close_handle, (void *) (long) blockh);
}
}
static void
exec_on_slave_terminal( struct terminal *term,
unsigned char *path, int plen,
unsigned char *delete, int dlen,
int fg)
{
int data_size = plen + dlen + 1 /* 0 */ + 1 /* fg */ + 2 /* 2 null char */;
unsigned char *data = mem_alloc(data_size);
if (data) {
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);
mem_free(data);
}
}
void
exec_on_terminal(struct terminal *term, unsigned char *path,
unsigned char *delete, int fg)
{
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if (path) {
if (!*path) return;
} else {
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path = "";
}
#ifdef NO_FG_EXEC
fg = 0;
#endif
if (term->master) {
if (!*path) {
dispatch_special(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)
{
unsigned char *sh;
if (!can_open_os_shell(term->environment)) return;
sh = get_shell();
if (sh && *sh)
exec_on_terminal(term, sh, "", 1);
}
void
do_terminal_function(struct terminal *term, unsigned char code,
unsigned char *data)
{
int data_len = strlen(data);
unsigned char *x_data = 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, 0);
fmem_free(x_data);
}
void
set_terminal_title(struct terminal *term, unsigned char *title)
{
if (term->title && !strcmp(title, term->title)) return;
mem_free_set(&term->title, stracpy(title));
do_terminal_function(term, TERM_FN_TITLE, title);
}
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;
}