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vis.c
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vis.c
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/*
* Copyright (c) 2014 Marc André Tanner <mat at brain-dump.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <locale.h>
#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 <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.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"
static Macro *macro_get(Vis *vis, enum VisMacro m);
static void macro_replay(Vis *vis, const Macro *macro);
const char *expandtab(Vis *vis) {
static char spaces[9];
int tabwidth = vis->tabwidth;
tabwidth = MIN(tabwidth, LENGTH(spaces) - 1);
for (int i = 0; i < tabwidth; i++)
spaces[i] = ' ';
spaces[tabwidth] = '\0';
return vis->expandtab ? spaces : "\t";
}
/** window / file handling */
static void file_free(Vis *vis, File *file) {
if (!file)
return;
if (--file->refcount > 0)
return;
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);
file->refcount++;
if (vis->files)
vis->files->prev = file;
file->next = vis->files;
vis->files = file;
return file;
}
static File *file_new(Vis *vis, const char *filename) {
if (filename) {
/* 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, filename) == 0) {
file->refcount++;
return file;
}
}
}
Text *text = text_load(filename);
if (!text && filename && errno == ENOENT)
text = text_load(NULL);
if (!text)
return NULL;
File *file = file_new_text(vis, text);
if (!file) {
text_free(text);
return NULL;
}
if (filename)
file->name = strdup(filename);
return file;
}
void vis_window_name(Win *win, const char *filename) {
File *file = win->file;
if (filename != file->name) {
free((char*)file->name);
file->name = filename ? strdup(filename) : NULL;
}
if (filename) {
Vis *vis = win->editor;
for (Syntax *syn = vis->syntaxes; syn && syn->name; syn++) {
if (!regexec(&syn->file_regex, filename, 0, NULL, 0)) {
view_syntax_set(win->view, syn);
for (const char **opt = syn->settings; opt && *opt; opt++)
vis_cmd(vis, *opt);
break;
}
}
}
}
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);
}
static void window_selection_changed(void *win, Filerange *sel) {
File *file = ((Win*)win)->file;
if (text_range_valid(sel)) {
file->marks[MARK_SELECTION_START] = text_mark_set(file->text, sel->start);
file->marks[MARK_SELECTION_END] = text_mark_set(file->text, sel->end);
}
}
static void window_free(Win *win) {
if (!win)
return;
Vis *vis = win->editor;
if (vis && vis->ui)
vis->ui->window_free(win->ui);
view_free(win->view);
ringbuf_free(win->jumplist);
free(win);
}
static Win *window_new_file(Vis *vis, File *file) {
Win *win = calloc(1, sizeof(Win));
if (!win)
return NULL;
win->editor = vis;
win->file = file;
win->events = (ViewEvent) {
.data = win,
.selection = window_selection_changed,
};
win->jumplist = ringbuf_alloc(31);
win->view = view_new(file->text, &win->events);
win->ui = vis->ui->window_new(vis->ui, win->view, file);
if (!win->jumplist || !win->view || !win->ui) {
window_free(win);
return NULL;
}
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);
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->editor, name);
win->file->name = name;
if (!file)
return false;
file_free(win->editor, win->file);
win->file = file;
win->ui->reload(win->ui, file);
return true;
}
bool vis_window_split(Win *original) {
Win *win = window_new_file(original->editor, original->file);
if (!win)
return false;
win->file = original->file;
win->file->refcount++;
view_syntax_set(win->view, view_syntax_get(original->view));
view_options_set(win->view, view_options_get(original->view));
view_cursor_to(win->view, view_cursor_get(original->view));
vis_draw(win->editor);
return true;
}
void vis_resize(Vis *vis) {
vis->ui->resize(vis->ui);
}
void vis_window_next(Vis *vis) {
Win *sel = vis->win;
if (!sel)
return;
vis->win = vis->win->next;
if (!vis->win)
vis->win = vis->windows;
vis->ui->window_focus(vis->win->ui);
}
void vis_window_prev(Vis *vis) {
Win *sel = vis->win;
if (!sel)
return;
vis->win = vis->win->prev;
if (!vis->win)
for (vis->win = vis->windows; vis->win->next; vis->win = vis->win->next);
vis->ui->window_focus(vis->win->ui);
}
bool vis_syntax_load(Vis *vis, Syntax *syntaxes) {
bool success = true;
vis->syntaxes = syntaxes;
for (Syntax *syn = syntaxes; syn && syn->name; syn++) {
if (regcomp(&syn->file_regex, syn->file, REG_EXTENDED|REG_NOSUB|REG_ICASE|REG_NEWLINE))
success = false;
for (int j = 0; j < LENGTH(syn->rules); j++) {
SyntaxRule *rule = &syn->rules[j];
if (!rule->rule)
break;
int cflags = REG_EXTENDED;
if (!rule->multiline)
cflags |= REG_NEWLINE;
if (regcomp(&rule->regex, rule->rule, cflags))
success = false;
}
}
return success;
}
void vis_syntax_unload(Vis *vis) {
for (Syntax *syn = vis->syntaxes; syn && syn->name; syn++) {
regfree(&syn->file_regex);
for (int j = 0; j < LENGTH(syn->rules); j++) {
SyntaxRule *rule = &syn->rules[j];
if (!rule->rule)
break;
regfree(&rule->regex);
}
}
vis->syntaxes = NULL;
}
void vis_draw(Vis *vis) {
vis->ui->draw(vis->ui);
}
void vis_update(Vis *vis) {
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);
if (!win) {
file_free(vis, file);
return false;
}
vis_window_name(win, filename);
vis_draw(vis);
return true;
}
void vis_window_close(Win *win) {
Vis *vis = win->editor;
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 (vis->prompt_window == win)
vis->prompt_window = NULL;
window_free(win);
if (vis->win)
vis->ui->window_focus(vis->win->ui);
vis_draw(vis);
}
Vis *vis_new(Ui *ui) {
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;
for (int i = 0; i < VIS_MODE_LAST; i++) {
Mode *mode = &vis_modes[i];
if (!(mode->bindings = map_new()))
goto err;
}
if (!(vis->prompt = calloc(1, sizeof(Win))))
goto err;
if (!(vis->prompt->file = calloc(1, sizeof(File))))
goto err;
if (!(vis->prompt->file->text = text_load(NULL)))
goto err;
if (!(vis->prompt->view = view_new(vis->prompt->file->text, NULL)))
goto err;
if (!(vis->prompt->ui = vis->ui->prompt_new(vis->ui, vis->prompt->view, vis->prompt->file)))
goto err;
if (!(vis->search_pattern = text_regex_new()))
goto err;
vis->mode_prev = vis->mode = &vis_modes[VIS_MODE_NORMAL];
return vis;
err:
vis_free(vis);
return NULL;
}
void vis_free(Vis *vis) {
if (!vis)
return;
while (vis->windows)
vis_window_close(vis->windows);
file_free(vis, vis->prompt->file);
window_free(vis->prompt);
text_regex_free(vis->search_pattern);
for (int i = 0; i < LENGTH(vis->registers); i++)
register_release(&vis->registers[i]);
for (int i = 0; i < LENGTH(vis->macros); i++)
macro_release(&vis->macros[i]);
vis_syntax_unload(vis);
vis->ui->free(vis->ui);
map_free(vis->cmds);
map_free(vis->options);
map_free(vis->actions);
buffer_release(&vis->input_queue);
for (int i = 0; i < VIS_MODE_LAST; i++) {
Mode *mode = &vis_modes[i];
map_free(mode->bindings);
}
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) {
size_t chars = 0;
for (size_t i = 0; i < len; i++) {
if (ISUTF8(data[i]))
chars++;
}
Text *txt = vis->win->file->text;
Iterator it = text_iterator_get(txt, pos);
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);
}
void vis_prompt_show(Vis *vis, const char *title, const char *text) {
if (vis->prompt_window)
return;
vis->prompt_window = vis->win;
vis->win = vis->prompt;
vis->prompt_type = title[0];
vis->ui->prompt(vis->ui, title, text);
}
void vis_prompt_hide(Vis *vis) {
if (!vis->prompt_window)
return;
vis->ui->prompt_hide(vis->ui);
vis->win = vis->prompt_window;
vis->prompt_window = NULL;
}
char *vis_prompt_get(Vis *vis) {
return vis->ui->prompt_input(vis->ui);
}
void vis_info_show(Vis *vis, const char *msg, ...) {
va_list ap;
va_start(ap, msg);
vis->ui->info(vis->ui, msg, ap);
va_end(ap);
}
void vis_info_hide(Vis *vis) {
vis->ui->info_hide(vis->ui);
}
static TextObject textobjs[] = {
[TEXT_OBJ_INNER_WORD] = { text_object_word },
[TEXT_OBJ_OUTER_WORD] = { text_object_word_outer },
[TEXT_OBJ_INNER_LONGWORD] = { text_object_longword },
[TEXT_OBJ_OUTER_LONGWORD] = { text_object_longword_outer },
[TEXT_OBJ_SENTENCE] = { text_object_sentence },
[TEXT_OBJ_PARAGRAPH] = { text_object_paragraph },
[TEXT_OBJ_OUTER_SQUARE_BRACKET] = { text_object_square_bracket, OUTER },
[TEXT_OBJ_INNER_SQUARE_BRACKET] = { text_object_square_bracket, INNER },
[TEXT_OBJ_OUTER_CURLY_BRACKET] = { text_object_curly_bracket, OUTER },
[TEXT_OBJ_INNER_CURLY_BRACKET] = { text_object_curly_bracket, INNER },
[TEXT_OBJ_OUTER_ANGLE_BRACKET] = { text_object_angle_bracket, OUTER },
[TEXT_OBJ_INNER_ANGLE_BRACKET] = { text_object_angle_bracket, INNER },
[TEXT_OBJ_OUTER_PARANTHESE] = { text_object_paranthese, OUTER },
[TEXT_OBJ_INNER_PARANTHESE] = { text_object_paranthese, INNER },
[TEXT_OBJ_OUTER_QUOTE] = { text_object_quote, OUTER },
[TEXT_OBJ_INNER_QUOTE] = { text_object_quote, INNER },
[TEXT_OBJ_OUTER_SINGLE_QUOTE] = { text_object_single_quote, OUTER },
[TEXT_OBJ_INNER_SINGLE_QUOTE] = { text_object_single_quote, INNER },
[TEXT_OBJ_OUTER_BACKTICK] = { text_object_backtick, OUTER },
[TEXT_OBJ_INNER_BACKTICK] = { text_object_backtick, INNER },
[TEXT_OBJ_OUTER_ENTIRE] = { text_object_entire, },
[TEXT_OBJ_INNER_ENTIRE] = { text_object_entire_inner, },
[TEXT_OBJ_OUTER_FUNCTION] = { text_object_function, },
[TEXT_OBJ_INNER_FUNCTION] = { text_object_function_inner, },
[TEXT_OBJ_OUTER_LINE] = { text_object_line, },
[TEXT_OBJ_INNER_LINE] = { text_object_line_inner, },
};
bool vis_action_register(Vis *vis, KeyAction *action) {
if (!vis->actions)
vis->actions = map_new();
if (!vis->actions)
return false;
return map_put(vis->actions, action->name, action);
}
static const char *getkey(Vis*);
static void action_do(Vis*, Action *a);
/** action processing: execut the operator / movement / text object */
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);
}
static void action_do(Vis *vis, Action *a) {
Win *win = vis->win;
Text *txt = win->file->text;
View *view = win->view;
if (a->count < 1)
a->count = 1;
bool repeatable = a->op && !vis->macro_operator;
bool multiple_cursors = view_cursors_count(view) > 1;
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 = a->reg ? a->reg : &vis->registers[REG_DEFAULT];
if (multiple_cursors)
reg = view_cursors_register(cursor);
OperatorContext c = {
.count = a->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 < a->count; i++) {
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);
if (pos == EPOS || a->movement->type & IDEMPOTENT)
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) {
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 < a->count; i++) {
Filerange r = a->textobj->range(txt, pos);
if (!text_range_valid(&r))
break;
if (a->textobj->type == OUTER) {
r.start--;
r.end++;
}
c.range = text_range_union(&c.range, &r);
if (i < a->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_to(cursor, pos);
} else {
view_cursors_dispose(cursor);
}
}
}
if (a->op) {
/* we do not support visual repeat, still do something resonable */
if (vis->mode->visual && !a->movement && !a->textobj)
a->movement = &moves[MOVE_NOP];
/* operator implementations must not change the mode,
* they might get called multiple times (once for every cursor)
*/
if (a->op == &ops[OP_INSERT] || a->op == &ops[OP_CHANGE])
vis_mode_switch(vis, VIS_MODE_INSERT);
else if (a->op == &ops[OP_REPLACE])
vis_mode_switch(vis, VIS_MODE_REPLACE);
else if (vis->mode == &vis_modes[VIS_MODE_OPERATOR])
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(vis, a);
}
}
void action_reset(Vis *vis, Action *a) {
memset(a, 0, sizeof(*a));
}
static bool prompt_cmd(Vis *vis, char type, const char *cmd) {
if (!cmd || !cmd[0])
return true;
switch (type) {
case '/':
return vis_motion(vis, MOVE_SEARCH_FORWARD, cmd);
case '?':
return vis_motion(vis, MOVE_SEARCH_BACKWARD, cmd);
case '+':
case ':':
return vis_cmd(vis, cmd);
}
return false;
}
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_key_next(Vis *vis, const char *keys) {
TermKeyKey key;
TermKey *termkey = vis->ui->termkey_get(vis->ui);
const char *next = NULL;
if (!keys)
return 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 const char *vis_keys_raw(Vis *vis, Buffer *buf, const char *input) {
char *keys = buf->data, *start = keys, *cur = keys, *end;
bool prefix = false;
KeyBinding *binding = NULL;
while (cur && *cur) {
if (!(end = (char*)vis_key_next(vis, cur)))
goto err; // XXX: can't parse key this should never happen
char tmp = *end;
*end = '\0';
prefix = false;
binding = NULL;
for (Mode *mode = vis->mode; mode && !binding && !prefix; mode = mode->parent) {
binding = map_get(mode->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->bindings, start);
}
*end = tmp;
vis->keys = buf;
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;
}
}
vis->keys = NULL;
buffer_put0(buf, start);
return input + (start - keys);
err:
vis->keys = NULL;
buffer_truncate(buf);
return input + strlen(input);
}
bool vis_keys_inject(Vis *vis, const char *pos, const char *input) {
Buffer *buf = vis->keys;
if (!buf)
return false;
if (pos < buf->data || pos > buf->data + buf->len)
return false;
size_t off = pos - buf->data;
buffer_insert0(buf, off, input);
if (vis->macro_operator)
macro_append(vis->macro_operator, input);
return true;
}
const char *vis_keys(Vis *vis, const char *input) {
if (!input)
return NULL;
if (vis->recording)
macro_append(vis->recording, input);
if (vis->macro_operator)
macro_append(vis->macro_operator, input);
if (!buffer_append0(&vis->input_queue, input)) {
buffer_truncate(&vis->input_queue);
return NULL;
}
return vis_keys_raw(vis, &vis->input_queue, input);
}
static const char *getkey(Vis *vis) {
const char *key = vis->ui->getkey(vis->ui);
if (!key)
return NULL;
vis_info_hide(vis);
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, compiled " __DATE__ " " __TIME__ "\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) {
prompt_cmd(vis, cmd[0], cmd+1);
cmd = NULL;
}
}
if (!vis->windows) {
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)
prompt_cmd(vis, cmd[0], cmd+1);
}
}
int vis_run(Vis *vis, int argc, char *argv[]) {
vis_args(vis, argc, argv);
struct timespec idle = { .tv_nsec = 0 }, *timeout = NULL;
sigset_t emptyset;
sigemptyset(&emptyset);
vis_draw(vis);
vis->running = true;
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)) {
if (vis->mode->idle)
vis->mode->idle(vis);
timeout = NULL;
continue;
}
TermKey *termkey = vis->ui->termkey_get(vis->ui);
termkey_advisereadable(termkey);
const char *key;
while ((key = getkey(vis)))
vis_keys(vis, key);
if (vis->mode->idle)
timeout = &idle;
}
return vis->exit_status;
}
bool vis_operator(Vis *vis, enum VisOperator id) {
switch (id) {
case OP_CASE_LOWER:
case OP_CASE_UPPER:
case OP_CASE_SWAP:
vis->action.arg.i = id;
id = OP_CASE_SWAP;
break;
case OP_CURSOR_SOL:
case OP_CURSOR_EOL:
vis->action.arg.i = id;
id = OP_CURSOR_SOL;
break;
case OP_PUT_AFTER:
case OP_PUT_AFTER_END:
case OP_PUT_BEFORE:
case OP_PUT_BEFORE_END:
vis->action.arg.i = id;
id = OP_PUT_AFTER;
break;
default:
break;
}
if (id >= LENGTH(ops))
return false;
Operator *op = &ops[id];
if (vis->mode->visual) {
vis->action.op = op;
action_do(vis, &vis->action);
return true;
}
/* switch to operator mode inorder to make operator options and
* text-object available */
vis_mode_switch(vis, VIS_MODE_OPERATOR);
if (vis->action.op == op) {
/* hacky way to handle double operators i.e. things like