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elinks/src/dialogs/exmode.c

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/* Ex-mode-like commandline support */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <ctype.h>
#include <string.h>
#include "elinks.h"
#include "bfu/dialog.h"
#include "config/conf.h"
#include "config/kbdbind.h"
#include "config/options.h"
#include "dialogs/exmode.h"
#include "intl/gettext/libintl.h"
#include "main/module.h"
#include "session/session.h"
#include "session/task.h"
#include "terminal/terminal.h"
#include "util/error.h"
#include "util/memory.h"
#include "util/string.h"
#include "viewer/action.h"
/* The Ex-mode commandline is that blue-yellow thing which appears at the
* bottom of the screen when you press ':' and lets you enter various commands
* (just like in vi), especially actions, events (where they make sense) and
* config-file commands. */
#define EXMODE_HISTORY_FILENAME "exmodehist"
static INIT_INPUT_HISTORY(exmode_history);
typedef int (*exmode_handler_T)(struct session *, unsigned char *, unsigned char *);
static int
exmode_action_handler(struct session *ses, unsigned char *command,
unsigned char *args)
{
enum main_action action_id = get_action_from_string(KEYMAP_MAIN, command);
if (action_id == ACT_MAIN_NONE) return 0;
if (action_id == ACT_MAIN_QUIT) action_id = ACT_MAIN_REALLY_QUIT;
if (!*args)
return do_action(ses, action_id, 0) != FRAME_EVENT_IGNORED;
switch (action_id) {
case ACT_MAIN_GOTO_URL:
goto_url_with_hook(ses, args);
return 1;
default:
break;
}
return 0;
}
static int
exmode_confcmd_handler(struct session *ses, unsigned char *command,
unsigned char *args)
{
int dummyline = 0;
enum parse_error err;
assert(ses && command && args);
if (get_cmd_opt_bool("anonymous"))
return 0;
/* Undo the arguments separation. */
if (*args) *(--args) = ' ';
err = parse_config_command(config_options, &command, &dummyline, NULL,
0);
return err;
}
static const exmode_handler_T exmode_handlers[] = {
exmode_action_handler,
exmode_confcmd_handler,
NULL,
};
static void
exmode_exec(struct session *ses, unsigned char buffer[INPUT_LINE_BUFFER_SIZE])
{
/* First look it up as action, then try it as an event (but the event
* part should be thought out somehow yet, I s'pose... let's leave it
* off for now). Then try to evaluate it as configfile command. Then at
* least pop up an error. */
unsigned char *command = buffer;
unsigned char *args = command;
int i;
while (*command == ':') command++;
if (!*command) return;
add_to_input_history(&exmode_history, command, 1);
skip_nonspace(args);
if (*args) *args++ = 0;
for (i = 0; exmode_handlers[i]; i++) {
if (exmode_handlers[i](ses, command, args))
break;
}
}
static enum input_line_code
exmode_input_handler(struct input_line *input_line, int action_id)
{
switch (action_id) {
case ACT_EDIT_ENTER:
exmode_exec(input_line->ses, input_line->buffer);
return INPUT_LINE_CANCEL;
default:
return INPUT_LINE_PROCEED;
}
}
void
exmode_start(struct session *ses)
{
input_field_line(ses, ":", NULL, &exmode_history, exmode_input_handler);
}
static void
init_exmode(struct module *module)
{
load_input_history(&exmode_history, EXMODE_HISTORY_FILENAME);
}
static void
done_exmode(struct module *module)
{
save_input_history(&exmode_history, EXMODE_HISTORY_FILENAME);
free_list(exmode_history.entries);
}
struct module exmode_module = struct_module(
/* name: */ N_("Exmode"),
/* options: */ NULL,
/* hooks: */ NULL,
/* submodules: */ NULL,
/* data: */ NULL,
/* init: */ init_exmode,
/* done: */ done_exmode
);