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vis.c
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vis.c
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#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <regex.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <pwd.h>
#include <libgen.h>
#include <termkey.h>
#include "vis.h"
#include "text-util.h"
#include "text-motions.h"
#include "text-objects.h"
#include "util.h"
#include "vis-core.h"
#include "sam.h"
static Macro *macro_get(Vis *vis, enum VisRegister);
static void macro_replay(Vis *vis, const Macro *macro);
static void vis_keys_process(Vis *vis);
/** window / file handling */
static void file_free(Vis *vis, File *file) {
if (!file)
return;
if (file->refcount > 1) {
--file->refcount;
return;
}
if (!file->internal && vis->event && vis->event->file_close)
vis->event->file_close(vis, file);
text_free(file->text);
free((char*)file->name);
if (file->prev)
file->prev->next = file->next;
if (file->next)
file->next->prev = file->prev;
if (vis->files == file)
vis->files = file->next;
free(file);
}
static File *file_new_text(Vis *vis, Text *text) {
File *file = calloc(1, sizeof(*file));
if (!file)
return NULL;
file->text = text;
file->stat = text_stat(text);
if (vis->files)
vis->files->prev = file;
file->next = vis->files;
vis->files = file;
return file;
}
static char *absolute_path(const char *name) {
if (!name)
return NULL;
char *copy1 = strdup(name);
char *copy2 = strdup(name);
char *path_absolute = NULL;
char path_normalized[PATH_MAX] = "";
if (!copy1 || !copy2)
goto err;
char *dir = dirname(copy1);
char *base = basename(copy2);
if (!(path_absolute = realpath(dir, NULL)))
goto err;
snprintf(path_normalized, sizeof(path_normalized)-1, "%s/%s",
path_absolute, base);
err:
free(copy1);
free(copy2);
free(path_absolute);
return path_normalized[0] ? strdup(path_normalized) : NULL;
}
static File *file_new(Vis *vis, const char *name) {
char *name_absolute = NULL;
if (name) {
if (!(name_absolute = absolute_path(name)))
return NULL;
File *existing = NULL;
/* try to detect whether the same file is already open in another window
* TODO: do this based on inodes */
for (File *file = vis->files; file; file = file->next) {
if (file->name && strcmp(file->name, name_absolute) == 0) {
existing = file;
break;
}
}
if (existing) {
free(name_absolute);
return existing;
}
}
File *file = NULL;
Text *text = text_load(name);
if (!text && name && errno == ENOENT)
text = text_load(NULL);
if (!text)
goto err;
if (!(file = file_new_text(vis, text)))
goto err;
file->name = name_absolute;
if (!file->internal && vis->event && vis->event->file_open)
vis->event->file_open(vis, file);
return file;
err:
free(name_absolute);
text_free(text);
file_free(vis, file);
return NULL;
}
static File *file_new_internal(Vis *vis, const char *filename) {
File *file = file_new(vis, filename);
if (file) {
file->refcount = 1;
file->internal = true;
}
return file;
}
void file_name_set(File *file, const char *name) {
if (name == file->name)
return;
free((char*)file->name);
file->name = absolute_path(name);
}
const char *file_name_get(File *file) {
/* TODO: calculate path relative to working directory, cache result */
if (!file->name)
return NULL;
char cwd[PATH_MAX];
if (!getcwd(cwd, sizeof cwd))
return file->name;
const char *path = strstr(file->name, cwd);
if (path != file->name)
return file->name;
size_t cwdlen = strlen(cwd);
return file->name[cwdlen] == '/' ? file->name+cwdlen+1 : file->name;
}
void vis_window_status(Win *win, const char *status) {
win->ui->status(win->ui, status);
}
static void windows_invalidate(Vis *vis, size_t start, size_t end) {
for (Win *win = vis->windows; win; win = win->next) {
if (vis->win != win && vis->win->file == win->file) {
Filerange view = view_viewport_get(win->view);
if ((view.start <= start && start <= view.end) ||
(view.start <= end && end <= view.end))
view_draw(win->view);
}
}
view_draw(vis->win->view);
}
void window_selection_save(Win *win) {
File *file = win->file;
Filerange sel = view_cursors_selection_get(view_cursors(win->view));
file->marks[VIS_MARK_SELECTION_START] = text_mark_set(file->text, sel.start);
file->marks[VIS_MARK_SELECTION_END] = text_mark_set(file->text, sel.end);
}
static void window_free(Win *win) {
if (!win)
return;
Vis *vis = win->vis;
for (Win *other = vis->windows; other; other = other->next) {
if (other->parent == win)
other->parent = NULL;
}
if (vis->ui)
vis->ui->window_free(win->ui);
view_free(win->view);
for (size_t i = 0; i < LENGTH(win->modes); i++)
map_free(win->modes[i].bindings);
ringbuf_free(win->jumplist);
free(win->lexer_name);
free(win);
}
static void window_draw(void *ctx) {
Win *win = ctx;
if (!win->ui)
return;
Vis *vis = win->vis;
if (!win->file->internal && vis->event) {
if (win->lexer_name && vis->event->win_highlight)
vis->event->win_highlight(vis, win, win->horizon);
if (vis->event->win_status)
vis->event->win_status(vis, win);
}
}
Win *window_new_file(Vis *vis, File *file, enum UiOption options) {
Win *win = calloc(1, sizeof(Win));
if (!win)
return NULL;
win->vis = vis;
win->file = file;
win->jumplist = ringbuf_alloc(31);
win->event.data = win;
win->event.draw = window_draw;
win->horizon = 1 << 15;
win->view = view_new(file->text, &win->event);
win->ui = vis->ui->window_new(vis->ui, win->view, file, options);
if (!win->jumplist || !win->view || !win->ui) {
window_free(win);
return NULL;
}
file->refcount++;
view_tabwidth_set(win->view, vis->tabwidth);
if (vis->windows)
vis->windows->prev = win;
win->next = vis->windows;
vis->windows = win;
vis->win = win;
vis->ui->window_focus(win->ui);
for (size_t i = 0; i < LENGTH(win->modes); i++)
win->modes[i].parent = &vis_modes[i];
if (!file->internal && vis->event && vis->event->win_open)
vis->event->win_open(vis, win);
return win;
}
bool vis_window_reload(Win *win) {
const char *name = win->file->name;
if (!name)
return false; /* can't reload unsaved file */
/* temporarily unset file name, otherwise file_new returns the same File */
win->file->name = NULL;
File *file = file_new(win->vis, name);
win->file->name = name;
if (!file)
return false;
file_free(win->vis, win->file);
file->refcount = 1;
win->file = file;
win->ui->reload(win->ui, file);
return true;
}
bool vis_window_split(Win *original) {
Win *win = window_new_file(original->vis, original->file, UI_OPTION_STATUSBAR);
if (!win)
return false;
for (size_t i = 0; i < LENGTH(win->modes); i++) {
if (original->modes[i].bindings)
win->modes[i].bindings = map_new();
if (win->modes[i].bindings)
map_copy(win->modes[i].bindings, original->modes[i].bindings);
}
win->file = original->file;
win->file->refcount++;
vis_window_syntax_set(win, vis_window_syntax_get(original));
view_options_set(win->view, view_options_get(original->view));
view_cursor_to(win->view, view_cursor_get(original->view));
return true;
}
void vis_window_focus(Win *win) {
if (!win)
return;
Vis *vis = win->vis;
vis->win = win;
vis->ui->window_focus(win->ui);
}
void vis_window_next(Vis *vis) {
Win *sel = vis->win;
if (!sel)
return;
vis_window_focus(sel->next ? sel->next : vis->windows);
}
void vis_window_prev(Vis *vis) {
Win *sel = vis->win;
if (!sel)
return;
sel = sel->prev;
if (!sel)
for (sel = vis->windows; sel->next; sel = sel->next);
vis_window_focus(sel);
}
const char *vis_window_syntax_get(Win *win) {
return win->lexer_name;
}
bool vis_window_syntax_set(Win *win, const char *syntax) {
Vis *vis = win->vis;
if (!win->file->internal && vis->event && vis->event->win_syntax) {
if (!vis->event->win_syntax(vis, win, syntax))
return false;
}
free(win->lexer_name);
win->lexer_name = syntax ? strdup(syntax) : NULL;
return !syntax || win->lexer_name;
}
int vis_window_width_get(const Win *win) {
return win->ui->window_width(win->ui);
}
int vis_window_height_get(const Win *win) {
return win->ui->window_height(win->ui);
}
void vis_draw(Vis *vis) {
vis->ui->draw(vis->ui);
}
void vis_redraw(Vis *vis) {
vis->ui->redraw(vis->ui);
}
void vis_update(Vis *vis) {
for (Win *win = vis->windows; win; win = win->next)
view_update(win->view);
vis->ui->update(vis->ui);
}
void vis_suspend(Vis *vis) {
vis->ui->suspend(vis->ui);
}
bool vis_window_new(Vis *vis, const char *filename) {
File *file = file_new(vis, filename);
if (!file)
return false;
Win *win = window_new_file(vis, file, UI_OPTION_STATUSBAR);
if (!win) {
file_free(vis, file);
return false;
}
return true;
}
bool vis_window_closable(Win *win) {
if (!win || !text_modified(win->file->text))
return true;
return win->file->refcount > 1;
}
void vis_window_swap(Win *a, Win *b) {
if (a == b || !a || !b)
return;
Vis *vis = a->vis;
Win *tmp = a->next;
a->next = b->next;
b->next = tmp;
if (a->next)
a->next->prev = a;
if (b->next)
b->next->prev = b;
tmp = a->prev;
a->prev = b->prev;
b->prev = tmp;
if (a->prev)
a->prev->next = a;
if (b->prev)
b->prev->next = b;
if (vis->windows == a)
vis->windows = b;
else if (vis->windows == b)
vis->windows = a;
vis->ui->window_swap(a->ui, b->ui);
if (vis->win == a)
vis_window_focus(b);
else if (vis->win == b)
vis_window_focus(a);
}
void vis_window_close(Win *win) {
if (!win)
return;
Vis *vis = win->vis;
if (!win->file->internal && vis->event && vis->event->win_close)
vis->event->win_close(vis, win);
file_free(vis, win->file);
if (win->prev)
win->prev->next = win->next;
if (win->next)
win->next->prev = win->prev;
if (vis->windows == win)
vis->windows = win->next;
if (vis->win == win)
vis->win = win->next ? win->next : win->prev;
if (win == vis->message_window)
vis->message_window = NULL;
window_free(win);
if (vis->win)
vis->ui->window_focus(vis->win->ui);
vis_draw(vis);
}
Vis *vis_new(Ui *ui, VisEvent *event) {
if (!ui)
return NULL;
Vis *vis = calloc(1, sizeof(Vis));
if (!vis)
return NULL;
vis->ui = ui;
vis->ui->init(vis->ui, vis);
vis->tabwidth = 8;
vis->expandtab = false;
vis->registers[VIS_REG_BLACKHOLE].type = REGISTER_BLACKHOLE;
vis->registers[VIS_REG_CLIPBOARD].type = REGISTER_CLIPBOARD;
array_init(&vis->motions);
array_init(&vis->textobjects);
action_reset(&vis->action);
buffer_init(&vis->input_queue);
vis->keys = &vis->input_queue;
if (!(vis->command_file = file_new_internal(vis, NULL)))
goto err;
if (!(vis->search_file = file_new_internal(vis, NULL)))
goto err;
if (!(vis->error_file = file_new_internal(vis, NULL)))
goto err;
if (!(vis->actions = map_new()))
goto err;
if (!(vis->keymap = map_new()))
goto err;
if (!sam_init(vis))
goto err;
vis->mode_prev = vis->mode = &vis_modes[VIS_MODE_NORMAL];
vis->event = event;
if (event && event->vis_init)
event->vis_init(vis);
vis->ui->start(vis->ui);
return vis;
err:
vis_free(vis);
return NULL;
}
void vis_free(Vis *vis) {
if (!vis)
return;
if (vis->event && vis->event->vis_quit)
vis->event->vis_quit(vis);
vis->event = NULL;
while (vis->windows)
vis_window_close(vis->windows);
file_free(vis, vis->command_file);
file_free(vis, vis->search_file);
file_free(vis, vis->error_file);
for (int i = 0; i < LENGTH(vis->registers); i++)
register_release(&vis->registers[i]);
vis->ui->free(vis->ui);
map_free(vis->cmds);
map_free_full(vis->usercmds);
map_free(vis->options);
map_free(vis->actions);
map_free(vis->keymap);
buffer_release(&vis->input_queue);
for (int i = 0; i < VIS_MODE_INVALID; i++)
map_free(vis_modes[i].bindings);
array_release_full(&vis->motions);
array_release_full(&vis->textobjects);
free(vis);
}
void vis_insert(Vis *vis, size_t pos, const char *data, size_t len) {
text_insert(vis->win->file->text, pos, data, len);
windows_invalidate(vis, pos, pos + len);
}
void vis_insert_key(Vis *vis, const char *data, size_t len) {
for (Cursor *c = view_cursors(vis->win->view); c; c = view_cursors_next(c)) {
size_t pos = view_cursors_pos(c);
vis_insert(vis, pos, data, len);
view_cursors_scroll_to(c, pos + len);
}
}
void vis_replace(Vis *vis, size_t pos, const char *data, size_t len) {
Text *txt = vis->win->file->text;
Iterator it = text_iterator_get(txt, pos);
int chars = text_char_count(data, len);
for (char c; chars-- > 0 && text_iterator_byte_get(&it, &c) && c != '\r' && c != '\n'; )
text_iterator_char_next(&it, NULL);
text_delete(txt, pos, it.pos - pos);
vis_insert(vis, pos, data, len);
}
void vis_replace_key(Vis *vis, const char *data, size_t len) {
for (Cursor *c = view_cursors(vis->win->view); c; c = view_cursors_next(c)) {
size_t pos = view_cursors_pos(c);
vis_replace(vis, pos, data, len);
view_cursors_scroll_to(c, pos + len);
}
}
void vis_delete(Vis *vis, size_t pos, size_t len) {
text_delete(vis->win->file->text, pos, len);
windows_invalidate(vis, pos, pos + len);
}
bool vis_action_register(Vis *vis, const KeyAction *action) {
return map_put(vis->actions, action->name, action);
}
bool vis_keymap_add(Vis *vis, const char *key, const char *mapping) {
return map_put(vis->keymap, key, mapping);
}
static void window_jumplist_add(Win *win, size_t pos) {
Mark mark = text_mark_set(win->file->text, pos);
if (mark && win->jumplist)
ringbuf_add(win->jumplist, mark);
}
static void window_jumplist_invalidate(Win *win) {
if (win->jumplist)
ringbuf_invalidate(win->jumplist);
}
void action_do(Vis *vis, Action *a) {
Win *win = vis->win;
Text *txt = win->file->text;
View *view = win->view;
if (a->op == &vis_operators[VIS_OP_FILTER] && !vis->mode->visual)
vis_mode_switch(vis, VIS_MODE_VISUAL_LINE);
int count = MAX(a->count, 1);
bool repeatable = a->op && !vis->macro_operator;
bool multiple_cursors = view_cursors_multiple(view);
bool linewise = !(a->type & CHARWISE) && (
a->type & LINEWISE || (a->movement && a->movement->type & LINEWISE) ||
vis->mode == &vis_modes[VIS_MODE_VISUAL_LINE]);
for (Cursor *cursor = view_cursors(view), *next; cursor; cursor = next) {
next = view_cursors_next(cursor);
size_t pos = view_cursors_pos(cursor);
Register *reg = multiple_cursors ? view_cursors_register(cursor) : a->reg;
if (!reg)
reg = &vis->registers[win->file->internal ? VIS_REG_PROMPT : VIS_REG_DEFAULT];
OperatorContext c = {
.count = count,
.pos = pos,
.newpos = EPOS,
.range = text_range_empty(),
.reg = reg,
.linewise = linewise,
.arg = &a->arg,
};
if (a->movement) {
size_t start = pos;
for (int i = 0; i < count; i++) {
size_t pos_prev = pos;
if (a->movement->txt)
pos = a->movement->txt(txt, pos);
else if (a->movement->cur)
pos = a->movement->cur(cursor);
else if (a->movement->file)
pos = a->movement->file(vis, vis->win->file, pos);
else if (a->movement->vis)
pos = a->movement->vis(vis, txt, pos);
else if (a->movement->view)
pos = a->movement->view(vis, view);
else if (a->movement->win)
pos = a->movement->win(vis, win, pos);
else if (a->movement->user)
pos = a->movement->user(vis, win, a->movement->data, pos);
if (pos == EPOS || a->movement->type & IDEMPOTENT || pos == pos_prev)
break;
}
if (pos == EPOS) {
c.range.start = start;
c.range.end = start;
pos = start;
} else {
c.range = text_range_new(start, pos);
c.newpos = pos;
}
if (!a->op) {
if (a->movement->type & CHARWISE)
view_cursors_scroll_to(cursor, pos);
else
view_cursors_to(cursor, pos);
if (vis->mode->visual)
c.range = view_cursors_selection_get(cursor);
if (a->movement->type & JUMP)
window_jumplist_add(win, pos);
else
window_jumplist_invalidate(win);
} else if (a->movement->type & INCLUSIVE ||
(linewise && a->movement->type & LINEWISE_INCLUSIVE)) {
c.range.end = text_char_next(txt, c.range.end);
}
} else if (a->textobj) {
if (vis->mode->visual)
c.range = view_cursors_selection_get(cursor);
else
c.range.start = c.range.end = pos;
for (int i = 0; i < count; i++) {
Filerange r = text_range_empty();
if (a->textobj->txt)
r = a->textobj->txt(txt, pos);
else if (a->textobj->vis)
r = a->textobj->vis(vis, txt, pos);
else if (a->textobj->user)
r = a->textobj->user(vis, win, a->textobj->data, pos);
if (!text_range_valid(&r))
break;
if (a->textobj->type & OUTER) {
r.start--;
r.end++;
}
if (vis->mode->visual)
c.range = text_range_union(&c.range, &r);
else
c.range = r;
if (i < count - 1)
pos = c.range.end + 1;
}
} else if (vis->mode->visual) {
c.range = view_cursors_selection_get(cursor);
if (!text_range_valid(&c.range))
c.range.start = c.range.end = pos;
}
if (linewise && vis->mode != &vis_modes[VIS_MODE_VISUAL])
c.range = text_range_linewise(txt, &c.range);
if (vis->mode->visual) {
view_cursors_selection_set(cursor, &c.range);
if (vis->mode == &vis_modes[VIS_MODE_VISUAL] || a->textobj)
view_cursors_selection_sync(cursor);
}
if (a->op) {
size_t pos = a->op->func(vis, txt, &c);
if (pos == EPOS) {
view_cursors_dispose(cursor);
} else if (pos <= text_size(txt)) {
/* moving the cursor will affect the selection.
* because we want to be able to later restore
* the old selection we update it again before
* leaving visual mode.
*/
Filerange sel = view_cursors_selection_get(cursor);
view_cursors_to(cursor, pos);
if (vis->mode->visual) {
if (sel.start == EPOS && sel.end == EPOS)
sel = c.range;
else if (sel.start == EPOS)
sel = text_range_new(c.range.start, sel.end);
else if (sel.end == EPOS)
sel = text_range_new(c.range.start, sel.start);
if (vis->mode == &vis_modes[VIS_MODE_VISUAL_LINE])
sel = text_range_linewise(txt, &sel);
view_cursors_selection_set(cursor, &sel);
}
}
}
}
if (a->op) {
/* we do not support visual repeat, still do something resonable */
if (vis->mode->visual && !a->movement && !a->textobj)
a->movement = &vis_motions[VIS_MOVE_NOP];
/* operator implementations must not change the mode,
* they might get called multiple times (once for every cursor)
*/
if (a->op == &vis_operators[VIS_OP_INSERT] || a->op == &vis_operators[VIS_OP_CHANGE]) {
vis_mode_switch(vis, VIS_MODE_INSERT);
} else if (a->op == &vis_operators[VIS_OP_REPLACE]) {
vis_mode_switch(vis, VIS_MODE_REPLACE);
} else if (a->op == &vis_operators[VIS_OP_FILTER]) {
if (a->arg.s)
vis_cmd(vis, a->arg.s);
else
vis_prompt_show(vis, ":|");
} else if (vis->mode == &vis_modes[VIS_MODE_OPERATOR_PENDING]) {
mode_set(vis, vis->mode_prev);
} else if (vis->mode->visual) {
vis_mode_switch(vis, VIS_MODE_NORMAL);
}
text_snapshot(txt);
vis_draw(vis);
}
if (a != &vis->action_prev) {
if (repeatable) {
if (!a->macro)
a->macro = vis->macro_operator;
vis->action_prev = *a;
}
action_reset(a);
}
}
void action_reset(Action *a) {
memset(a, 0, sizeof(*a));
a->count = VIS_COUNT_UNKNOWN;
}
void vis_cancel(Vis *vis) {
action_reset(&vis->action);
}
void vis_die(Vis *vis, const char *msg, ...) {
va_list ap;
va_start(ap, msg);
vis->ui->die(vis->ui, msg, ap);
va_end(ap);
}
const char *vis_keys_next(Vis *vis, const char *keys) {
if (!keys || !*keys)
return NULL;
TermKeyKey key;
TermKey *termkey = vis->ui->termkey_get(vis->ui);
const char *next = NULL;
/* first try to parse a special key of the form <Key> */
if (*keys == '<' && (next = termkey_strpkey(termkey, keys+1, &key, TERMKEY_FORMAT_VIM)) && *next == '>')
return next+1;
if (*keys == '<') {
const char *start = keys + 1, *end = start;
while (*end && *end != '>')
end++;
if (end > start && end - start - 1 < 64 && *end == '>') {
char key[64];
memcpy(key, start, end - start);
key[end - start] = '\0';
if (map_get(vis->actions, key))
return end + 1;
}
}
while (!ISUTF8(*keys))
keys++;
return termkey_strpkey(termkey, keys, &key, TERMKEY_FORMAT_VIM);
}
static void vis_keys_process(Vis *vis) {
Buffer *buf = vis->keys;
char *keys = buf->data, *start = keys, *cur = keys, *end;
bool prefix = false, unknown_key = false;
KeyBinding *binding = NULL;
vis->keyhandler = true;
while (cur && *cur) {
if (!(end = (char*)vis_keys_next(vis, cur))) {
unknown_key = true;
goto out;
}
char tmp = *end;
*end = '\0';
prefix = false;
binding = NULL;
for (Mode *mode = vis->mode; mode && !binding && !prefix; mode = mode->parent) {
for (int global = 0; global < 2 && !binding && !prefix; global++) {
Mode *mode_local = global || !vis->win ? mode : &vis->win->modes[mode->id];
if (!mode_local->bindings)
continue;
binding = map_get(mode_local->bindings, start);
/* "<" is never treated as a prefix because it is used to denote
* special key symbols */
if (strcmp(cur, "<"))
prefix = !binding && map_contains(mode_local->bindings, start);
}
}
*end = tmp;
if (binding) { /* exact match */
if (binding->action) {
end = (char*)binding->action->func(vis, end, &binding->action->arg);
if (!end)
break;
start = cur = end;
} else if (binding->alias) {
buffer_put0(buf, end);
buffer_prepend0(buf, binding->alias);
start = cur = buf->data;
}
} else if (prefix) { /* incomplete key binding? */
cur = end;
} else { /* no keybinding */
KeyAction *action = NULL;
if (start[0] == '<' && end[-1] == '>') {
/* test for special editor key command */
char tmp = end[-1];
end[-1] = '\0';
action = map_get(vis->actions, start+1);
end[-1] = tmp;
if (action) {
end = (char*)action->func(vis, end, &action->arg);
if (!end)
break;
}
}
if (!action && vis->mode->input)
vis->mode->input(vis, start, end - start);
start = cur = end;
}
}
out:
if (unknown_key)
buffer_truncate(buf);
else
buffer_put0(buf, start);
vis->keyhandler = false;
}
void vis_keys_feed(Vis *vis, const char *input) {
if (!input)
return;
if (vis->recording)
macro_append(vis->recording, input);
if (vis->macro_operator)
macro_append(vis->macro_operator, input);
if (!buffer_append0(vis->keys, input))
buffer_truncate(vis->keys);
/* if we are being called from within a keyhandler then appending
* the new keys to the end of the input queue is enough. they will
* be interpreted once the key handler returns and control reaches
* back to the vis_keys_process function. */
if (!vis->keyhandler)
vis_keys_process(vis);
}
static const char *getkey(Vis *vis) {
const char *key = vis->ui->getkey(vis->ui);
if (!key)
return NULL;
vis_info_hide(vis);
if (!vis->mode->input) {
const char *mapped = map_get(vis->keymap, key);
if (mapped)
return mapped;
}
return key;
}
bool vis_signal_handler(Vis *vis, int signum, const siginfo_t *siginfo, const void *context) {
switch (signum) {
case SIGBUS:
for (File *file = vis->files; file; file = file->next) {
if (text_sigbus(file->text, siginfo->si_addr))
file->truncated = true;
}
vis->sigbus = true;
if (vis->running)
siglongjmp(vis->sigbus_jmpbuf, 1);
return true;
case SIGINT:
vis->cancel_filter = true;
return true;
}
return false;
}
static void vis_args(Vis *vis, int argc, char *argv[]) {
char *cmd = NULL;
bool end_of_options = false;
for (int i = 1; i < argc; i++) {
if (argv[i][0] == '-' && !end_of_options) {
switch (argv[i][1]) {
case '-':
end_of_options = true;
break;
case 'v':
vis_die(vis, "vis %s\n", VERSION);
break;
case '\0':
break;
default:
vis_die(vis, "Unknown command option: %s\n", argv[i]);
break;
}
} else if (argv[i][0] == '+') {
cmd = argv[i] + (argv[i][1] == '/' || argv[i][1] == '?');
} else if (!vis_window_new(vis, argv[i])) {
vis_die(vis, "Can not load `%s': %s\n", argv[i], strerror(errno));
} else if (cmd) {
vis_prompt_cmd(vis, cmd);
cmd = NULL;
}
}
if (!vis->windows && vis->running) {
if (!strcmp(argv[argc-1], "-")) {
if (!vis_window_new(vis, NULL))
vis_die(vis, "Can not create empty buffer\n");
ssize_t len = 0;
char buf[PIPE_BUF];
File *file = vis->win->file;
Text *txt = file->text;
file->is_stdin = true;
while ((len = read(STDIN_FILENO, buf, sizeof buf)) > 0)
text_insert(txt, text_size(txt), buf, len);
if (len == -1)
vis_die(vis, "Can not read from stdin\n");
text_snapshot(txt);
int fd = open("/dev/tty", O_RDONLY);
if (fd == -1)
vis_die(vis, "Can not reopen stdin\n");
dup2(fd, STDIN_FILENO);
close(fd);
} else if (!vis_window_new(vis, NULL)) {
vis_die(vis, "Can not create empty buffer\n");
}
if (cmd)
vis_prompt_cmd(vis, cmd);
}
}
int vis_run(Vis *vis, int argc, char *argv[]) {
vis->running = true;
vis_args(vis, argc, argv);
if (vis->event && vis->event->vis_start)
vis->event->vis_start(vis);
struct timespec idle = { .tv_nsec = 0 }, *timeout = NULL;
sigset_t emptyset;
sigemptyset(&emptyset);
vis_draw(vis);
vis->exit_status = EXIT_SUCCESS;
sigsetjmp(vis->sigbus_jmpbuf, 1);
while (vis->running) {
fd_set fds;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
if (vis->sigbus) {
char *name = NULL;
for (Win *next, *win = vis->windows; win; win = next) {
next = win->next;
if (win->file->truncated) {
free(name);
name = strdup(win->file->name);
vis_window_close(win);
}
}
if (!vis->windows)
vis_die(vis, "WARNING: file `%s' truncated!\n", name ? name : "-");
else
vis_info_show(vis, "WARNING: file `%s' truncated!\n", name ? name : "-");
vis->sigbus = false;
free(name);
}
vis_update(vis);
idle.tv_sec = vis->mode->idle_timeout;
int r = pselect(1, &fds, NULL, NULL, timeout, &emptyset);
if (r == -1 && errno == EINTR)
continue;
if (r < 0) {
/* TODO save all pending changes to a ~suffixed file */
vis_die(vis, "Error in mainloop: %s\n", strerror(errno));
}
if (!FD_ISSET(STDIN_FILENO, &fds)) {