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tmux/key-bindings.c
nicm 723010ba72 Replace the split parser code (cfg.c and cmd-string.c) with a single 
parser using yacc(1). This is a major change but is clearer and simpler
and allows some edge cases to be made more consistent, as well as
tidying up how aliases are handled. It will also allow some further
improvements later.

Entirely the same parser is now used for parsing the configuration file
and for string commands. This means that constructs previously only
available in .tmux.conf, such as %if, can now be used in string commands
(for example, those given to if-shell - not commands invoked from the
shell, they are still parsed by the shell itself).

The only syntax change I am aware of is that #{} outside quotes or a
comment is now considered a format and not a comment, so #{ is now a
syntax error (notably, if it is at the start of a line).

This also adds two new sections to the man page documenting the syntax
and outlining how parsing and command execution works.

Thanks to everyone who sent me test configs (they still all parse
without errors - but this doesn't mean they still work as intended!).

Thanks to Avi Halachmi for testing and man page improvements, also to
jmc@ for reviewing the man page changes.
2019-05-23 11:13:30 +00:00

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/* $OpenBSD$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and 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 MIND, 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 <sys/types.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
static int key_bindings_cmp(struct key_binding *, struct key_binding *);
RB_GENERATE_STATIC(key_bindings, key_binding, entry, key_bindings_cmp);
static int key_table_cmp(struct key_table *, struct key_table *);
RB_GENERATE_STATIC(key_tables, key_table, entry, key_table_cmp);
static struct key_tables key_tables = RB_INITIALIZER(&key_tables);
static int
key_table_cmp(struct key_table *table1, struct key_table *table2)
{
return (strcmp(table1->name, table2->name));
}
static int
key_bindings_cmp(struct key_binding *bd1, struct key_binding *bd2)
{
if (bd1->key < bd2->key)
return (-1);
if (bd1->key > bd2->key)
return (1);
return (0);
}
struct key_table *
key_bindings_get_table(const char *name, int create)
{
struct key_table table_find, *table;
table_find.name = name;
table = RB_FIND(key_tables, &key_tables, &table_find);
if (table != NULL || !create)
return (table);
table = xmalloc(sizeof *table);
table->name = xstrdup(name);
RB_INIT(&table->key_bindings);
table->references = 1; /* one reference in key_tables */
RB_INSERT(key_tables, &key_tables, table);
return (table);
}
struct key_table *
key_bindings_first_table(void)
{
return (RB_MIN(key_tables, &key_tables));
}
struct key_table *
key_bindings_next_table(struct key_table *table)
{
return (RB_NEXT(key_tables, &key_tables, table));
}
void
key_bindings_unref_table(struct key_table *table)
{
struct key_binding *bd;
struct key_binding *bd1;
if (--table->references != 0)
return;
RB_FOREACH_SAFE(bd, key_bindings, &table->key_bindings, bd1) {
RB_REMOVE(key_bindings, &table->key_bindings, bd);
cmd_list_free(bd->cmdlist);
free(bd);
}
free((void *)table->name);
free(table);
}
struct key_binding *
key_bindings_get(struct key_table *table, key_code key)
{
struct key_binding bd;
bd.key = key;
return (RB_FIND(key_bindings, &table->key_bindings, &bd));
}
struct key_binding *
key_bindings_first(struct key_table *table)
{
return (RB_MIN(key_bindings, &table->key_bindings));
}
struct key_binding *
key_bindings_next(__unused struct key_table *table, struct key_binding *bd)
{
return (RB_NEXT(key_bindings, &table->key_bindings, bd));
}
void
key_bindings_add(const char *name, key_code key, int repeat,
struct cmd_list *cmdlist)
{
struct key_table *table;
struct key_binding bd_find, *bd;
table = key_bindings_get_table(name, 1);
bd_find.key = (key & ~KEYC_XTERM);
bd = RB_FIND(key_bindings, &table->key_bindings, &bd_find);
if (bd != NULL) {
RB_REMOVE(key_bindings, &table->key_bindings, bd);
cmd_list_free(bd->cmdlist);
free(bd);
}
bd = xcalloc(1, sizeof *bd);
bd->key = key;
RB_INSERT(key_bindings, &table->key_bindings, bd);
if (repeat)
bd->flags |= KEY_BINDING_REPEAT;
bd->cmdlist = cmdlist;
}
void
key_bindings_remove(const char *name, key_code key)
{
struct key_table *table;
struct key_binding bd_find, *bd;
table = key_bindings_get_table(name, 0);
if (table == NULL)
return;
bd_find.key = (key & ~KEYC_XTERM);
bd = RB_FIND(key_bindings, &table->key_bindings, &bd_find);
if (bd == NULL)
return;
RB_REMOVE(key_bindings, &table->key_bindings, bd);
cmd_list_free(bd->cmdlist);
free(bd);
if (RB_EMPTY(&table->key_bindings)) {
RB_REMOVE(key_tables, &key_tables, table);
key_bindings_unref_table(table);
}
}
void
key_bindings_remove_table(const char *name)
{
struct key_table *table;
struct client *c;
table = key_bindings_get_table(name, 0);
if (table != NULL) {
RB_REMOVE(key_tables, &key_tables, table);
key_bindings_unref_table(table);
}
TAILQ_FOREACH(c, &clients, entry) {
if (c->keytable == table)
server_client_set_key_table(c, NULL);
}
}
void
key_bindings_init(void)
{
static const char *defaults[] = {
"bind C-b send-prefix",
"bind C-o rotate-window",
"bind C-z suspend-client",
"bind Space next-layout",
"bind ! break-pane",
"bind '\"' split-window",
"bind '#' list-buffers",
"bind '$' command-prompt -I'#S' \"rename-session -- '%%'\"",
"bind % split-window -h",
"bind & confirm-before -p\"kill-window #W? (y/n)\" kill-window",
"bind \"'\" command-prompt -pindex \"select-window -t ':%%'\"",
"bind ( switch-client -p",
"bind ) switch-client -n",
"bind , command-prompt -I'#W' \"rename-window -- '%%'\"",
"bind - delete-buffer",
"bind . command-prompt \"move-window -t '%%'\"",
"bind 0 select-window -t:=0",
"bind 1 select-window -t:=1",
"bind 2 select-window -t:=2",
"bind 3 select-window -t:=3",
"bind 4 select-window -t:=4",
"bind 5 select-window -t:=5",
"bind 6 select-window -t:=6",
"bind 7 select-window -t:=7",
"bind 8 select-window -t:=8",
"bind 9 select-window -t:=9",
"bind : command-prompt",
"bind \\; last-pane",
"bind = choose-buffer -Z",
"bind ? list-keys",
"bind D choose-client -Z",
"bind E select-layout -E",
"bind L switch-client -l",
"bind M select-pane -M",
"bind [ copy-mode",
"bind ] paste-buffer",
"bind c new-window",
"bind d detach-client",
"bind f command-prompt \"find-window -Z -- '%%'\"",
"bind i display-message",
"bind l last-window",
"bind m select-pane -m",
"bind n next-window",
"bind o select-pane -t:.+",
"bind p previous-window",
"bind q display-panes",
"bind r refresh-client",
"bind s choose-tree -Zs",
"bind t clock-mode",
"bind w choose-tree -Zw",
"bind x confirm-before -p\"kill-pane #P? (y/n)\" kill-pane",
"bind z resize-pane -Z",
"bind { swap-pane -U",
"bind } swap-pane -D",
"bind '~' show-messages",
"bind PPage copy-mode -u",
"bind -r Up select-pane -U",
"bind -r Down select-pane -D",
"bind -r Left select-pane -L",
"bind -r Right select-pane -R",
"bind M-1 select-layout even-horizontal",
"bind M-2 select-layout even-vertical",
"bind M-3 select-layout main-horizontal",
"bind M-4 select-layout main-vertical",
"bind M-5 select-layout tiled",
"bind M-n next-window -a",
"bind M-o rotate-window -D",
"bind M-p previous-window -a",
"bind -r S-Up refresh-client -U 10",
"bind -r S-Down refresh-client -D 10",
"bind -r S-Left refresh-client -L 10",
"bind -r S-Right refresh-client -R 10",
"bind -r DC refresh-client -c",
"bind -r M-Up resize-pane -U 5",
"bind -r M-Down resize-pane -D 5",
"bind -r M-Left resize-pane -L 5",
"bind -r M-Right resize-pane -R 5",
"bind -r C-Up resize-pane -U",
"bind -r C-Down resize-pane -D",
"bind -r C-Left resize-pane -L",
"bind -r C-Right resize-pane -R",
"bind -n MouseDown1Pane select-pane -t=\\; send-keys -M",
"bind -n MouseDrag1Border resize-pane -M",
"bind -n MouseDown1Status select-window -t=",
"bind -n WheelDownStatus next-window",
"bind -n WheelUpStatus previous-window",
"bind -n MouseDrag1Pane if -Ft= '#{mouse_any_flag}' 'if -Ft= \"#{pane_in_mode}\" \"copy-mode -M\" \"send-keys -M\"' 'copy-mode -M'",
"bind -n MouseDown3Pane if -Ft= '#{||:mouse_any_flag,pane_in_mode}' 'select-pane -t=; send-keys -M' 'select-pane -mt='",
"bind -n WheelUpPane if -Ft= '#{mouse_any_flag}' 'send-keys -M' 'if -Ft= \"#{pane_in_mode}\" \"send-keys -M\" \"copy-mode -et=\"'",
"bind -n MouseDown3StatusRight display-menu -t= -xM -yS -F -M \"#{client_menu}\" -T \"#[align=centre]#{client_name}\"",
"bind -n MouseDown3StatusLeft display-menu -t= -xM -yS -F -M \"#{session_menu}\" -T \"#[align=centre]#{session_name}\"",
"bind -n MouseDown3Status display-menu -t= -xW -yS -F -M \"#{window_menu}\" -T \"#[align=centre]#{window_index}:#{window_name}\"",
"bind -n M-MouseDown3Pane display-menu -t= -xM -yM -F -M \"#{pane_menu}\" -T \"#[align=centre]#{pane_index} (#{pane_id})\"",
"bind -Tcopy-mode C-Space send -X begin-selection",
"bind -Tcopy-mode C-a send -X start-of-line",
"bind -Tcopy-mode C-c send -X cancel",
"bind -Tcopy-mode C-e send -X end-of-line",
"bind -Tcopy-mode C-f send -X cursor-right",
"bind -Tcopy-mode C-b send -X cursor-left",
"bind -Tcopy-mode C-g send -X clear-selection",
"bind -Tcopy-mode C-k send -X copy-end-of-line",
"bind -Tcopy-mode C-n send -X cursor-down",
"bind -Tcopy-mode C-p send -X cursor-up",
"bind -Tcopy-mode C-r command-prompt -ip'(search up)' -I'#{pane_search_string}' 'send -X search-backward-incremental \"%%%\"'",
"bind -Tcopy-mode C-s command-prompt -ip'(search down)' -I'#{pane_search_string}' 'send -X search-forward-incremental \"%%%\"'",
"bind -Tcopy-mode C-v send -X page-down",
"bind -Tcopy-mode C-w send -X copy-selection-and-cancel",
"bind -Tcopy-mode Escape send -X cancel",
"bind -Tcopy-mode Space send -X page-down",
"bind -Tcopy-mode , send -X jump-reverse",
"bind -Tcopy-mode \\; send -X jump-again",
"bind -Tcopy-mode F command-prompt -1p'(jump backward)' 'send -X jump-backward \"%%%\"'",
"bind -Tcopy-mode N send -X search-reverse",
"bind -Tcopy-mode R send -X rectangle-toggle",
"bind -Tcopy-mode T command-prompt -1p'(jump to backward)' 'send -X jump-to-backward \"%%%\"'",
"bind -Tcopy-mode f command-prompt -1p'(jump forward)' 'send -X jump-forward \"%%%\"'",
"bind -Tcopy-mode g command-prompt -p'(goto line)' 'send -X goto-line \"%%%\"'",
"bind -Tcopy-mode n send -X search-again",
"bind -Tcopy-mode q send -X cancel",
"bind -Tcopy-mode t command-prompt -1p'(jump to forward)' 'send -X jump-to-forward \"%%%\"'",
"bind -Tcopy-mode Home send -X start-of-line",
"bind -Tcopy-mode End send -X end-of-line",
"bind -Tcopy-mode MouseDown1Pane select-pane",
"bind -Tcopy-mode MouseDrag1Pane select-pane\\; send -X begin-selection",
"bind -Tcopy-mode MouseDragEnd1Pane send -X copy-selection-and-cancel",
"bind -Tcopy-mode WheelUpPane select-pane\\; send -N5 -X scroll-up",
"bind -Tcopy-mode WheelDownPane select-pane\\; send -N5 -X scroll-down",
"bind -Tcopy-mode DoubleClick1Pane select-pane\\; send -X select-word",
"bind -Tcopy-mode TripleClick1Pane select-pane\\; send -X select-line",
"bind -Tcopy-mode NPage send -X page-down",
"bind -Tcopy-mode PPage send -X page-up",
"bind -Tcopy-mode Up send -X cursor-up",
"bind -Tcopy-mode Down send -X cursor-down",
"bind -Tcopy-mode Left send -X cursor-left",
"bind -Tcopy-mode Right send -X cursor-right",
"bind -Tcopy-mode M-1 command-prompt -Np'(repeat)' -I1 'send -N \"%%%\"'",
"bind -Tcopy-mode M-2 command-prompt -Np'(repeat)' -I2 'send -N \"%%%\"'",
"bind -Tcopy-mode M-3 command-prompt -Np'(repeat)' -I3 'send -N \"%%%\"'",
"bind -Tcopy-mode M-4 command-prompt -Np'(repeat)' -I4 'send -N \"%%%\"'",
"bind -Tcopy-mode M-5 command-prompt -Np'(repeat)' -I5 'send -N \"%%%\"'",
"bind -Tcopy-mode M-6 command-prompt -Np'(repeat)' -I6 'send -N \"%%%\"'",
"bind -Tcopy-mode M-7 command-prompt -Np'(repeat)' -I7 'send -N \"%%%\"'",
"bind -Tcopy-mode M-8 command-prompt -Np'(repeat)' -I8 'send -N \"%%%\"'",
"bind -Tcopy-mode M-9 command-prompt -Np'(repeat)' -I9 'send -N \"%%%\"'",
"bind -Tcopy-mode M-< send -X history-top",
"bind -Tcopy-mode M-> send -X history-bottom",
"bind -Tcopy-mode M-R send -X top-line",
"bind -Tcopy-mode M-b send -X previous-word",
"bind -Tcopy-mode C-M-b send -X previous-matching-bracket",
"bind -Tcopy-mode M-f send -X next-word-end",
"bind -Tcopy-mode C-M-f send -X next-matching-bracket",
"bind -Tcopy-mode M-m send -X back-to-indentation",
"bind -Tcopy-mode M-r send -X middle-line",
"bind -Tcopy-mode M-v send -X page-up",
"bind -Tcopy-mode M-w send -X copy-selection-and-cancel",
"bind -Tcopy-mode M-{ send -X previous-paragraph",
"bind -Tcopy-mode M-} send -X next-paragraph",
"bind -Tcopy-mode M-Up send -X halfpage-up",
"bind -Tcopy-mode M-Down send -X halfpage-down",
"bind -Tcopy-mode C-Up send -X scroll-up",
"bind -Tcopy-mode C-Down send -X scroll-down",
"bind -Tcopy-mode-vi C-c send -X cancel",
"bind -Tcopy-mode-vi C-d send -X halfpage-down",
"bind -Tcopy-mode-vi C-e send -X scroll-down",
"bind -Tcopy-mode-vi C-b send -X page-up",
"bind -Tcopy-mode-vi C-f send -X page-down",
"bind -Tcopy-mode-vi C-h send -X cursor-left",
"bind -Tcopy-mode-vi C-j send -X copy-selection-and-cancel",
"bind -Tcopy-mode-vi Enter send -X copy-selection-and-cancel",
"bind -Tcopy-mode-vi C-u send -X halfpage-up",
"bind -Tcopy-mode-vi C-v send -X rectangle-toggle",
"bind -Tcopy-mode-vi C-y send -X scroll-up",
"bind -Tcopy-mode-vi Escape send -X clear-selection",
"bind -Tcopy-mode-vi Space send -X begin-selection",
"bind -Tcopy-mode-vi '$' send -X end-of-line",
"bind -Tcopy-mode-vi , send -X jump-reverse",
"bind -Tcopy-mode-vi / command-prompt -p'(search down)' 'send -X search-forward \"%%%\"'",
"bind -Tcopy-mode-vi 0 send -X start-of-line",
"bind -Tcopy-mode-vi 1 command-prompt -Np'(repeat)' -I1 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 2 command-prompt -Np'(repeat)' -I2 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 3 command-prompt -Np'(repeat)' -I3 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 4 command-prompt -Np'(repeat)' -I4 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 5 command-prompt -Np'(repeat)' -I5 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 6 command-prompt -Np'(repeat)' -I6 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 7 command-prompt -Np'(repeat)' -I7 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 8 command-prompt -Np'(repeat)' -I8 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi 9 command-prompt -Np'(repeat)' -I9 'send -N \"%%%\"'",
"bind -Tcopy-mode-vi : command-prompt -p'(goto line)' 'send -X goto-line \"%%%\"'",
"bind -Tcopy-mode-vi \\; send -X jump-again",
"bind -Tcopy-mode-vi ? command-prompt -p'(search up)' 'send -X search-backward \"%%%\"'",
"bind -Tcopy-mode-vi A send -X append-selection-and-cancel",
"bind -Tcopy-mode-vi B send -X previous-space",
"bind -Tcopy-mode-vi D send -X copy-end-of-line",
"bind -Tcopy-mode-vi E send -X next-space-end",
"bind -Tcopy-mode-vi F command-prompt -1p'(jump backward)' 'send -X jump-backward \"%%%\"'",
"bind -Tcopy-mode-vi G send -X history-bottom",
"bind -Tcopy-mode-vi H send -X top-line",
"bind -Tcopy-mode-vi J send -X scroll-down",
"bind -Tcopy-mode-vi K send -X scroll-up",
"bind -Tcopy-mode-vi L send -X bottom-line",
"bind -Tcopy-mode-vi M send -X middle-line",
"bind -Tcopy-mode-vi N send -X search-reverse",
"bind -Tcopy-mode-vi T command-prompt -1p'(jump to backward)' 'send -X jump-to-backward \"%%%\"'",
"bind -Tcopy-mode-vi V send -X select-line",
"bind -Tcopy-mode-vi W send -X next-space",
"bind -Tcopy-mode-vi ^ send -X back-to-indentation",
"bind -Tcopy-mode-vi b send -X previous-word",
"bind -Tcopy-mode-vi e send -X next-word-end",
"bind -Tcopy-mode-vi f command-prompt -1p'(jump forward)' 'send -X jump-forward \"%%%\"'",
"bind -Tcopy-mode-vi g send -X history-top",
"bind -Tcopy-mode-vi h send -X cursor-left",
"bind -Tcopy-mode-vi j send -X cursor-down",
"bind -Tcopy-mode-vi k send -X cursor-up",
"bind -Tcopy-mode-vi l send -X cursor-right",
"bind -Tcopy-mode-vi n send -X search-again",
"bind -Tcopy-mode-vi o send -X other-end",
"bind -Tcopy-mode-vi q send -X cancel",
"bind -Tcopy-mode-vi t command-prompt -1p'(jump to forward)' 'send -X jump-to-forward \"%%%\"'",
"bind -Tcopy-mode-vi v send -X rectangle-toggle",
"bind -Tcopy-mode-vi w send -X next-word",
"bind -Tcopy-mode-vi { send -X previous-paragraph",
"bind -Tcopy-mode-vi } send -X next-paragraph",
"bind -Tcopy-mode-vi % send -X next-matching-bracket",
"bind -Tcopy-mode-vi MouseDown1Pane select-pane",
"bind -Tcopy-mode-vi MouseDrag1Pane select-pane\\; send -X begin-selection",
"bind -Tcopy-mode-vi MouseDragEnd1Pane send -X copy-selection-and-cancel",
"bind -Tcopy-mode-vi WheelUpPane select-pane\\; send -N5 -X scroll-up",
"bind -Tcopy-mode-vi WheelDownPane select-pane\\; send -N5 -X scroll-down",
"bind -Tcopy-mode-vi DoubleClick1Pane select-pane\\; send -X select-word",
"bind -Tcopy-mode-vi TripleClick1Pane select-pane\\; send -X select-line",
"bind -Tcopy-mode-vi BSpace send -X cursor-left",
"bind -Tcopy-mode-vi NPage send -X page-down",
"bind -Tcopy-mode-vi PPage send -X page-up",
"bind -Tcopy-mode-vi Up send -X cursor-up",
"bind -Tcopy-mode-vi Down send -X cursor-down",
"bind -Tcopy-mode-vi Left send -X cursor-left",
"bind -Tcopy-mode-vi Right send -X cursor-right",
"bind -Tcopy-mode-vi C-Up send -X scroll-up",
"bind -Tcopy-mode-vi C-Down send -X scroll-down",
};
u_int i;
struct cmd_parse_result *pr;
for (i = 0; i < nitems(defaults); i++) {
pr = cmd_parse_from_string(defaults[i], NULL);
if (pr->status != CMD_PARSE_SUCCESS)
fatalx("bad default key: %s", defaults[i]);
cmdq_append(NULL, cmdq_get_command(pr->cmdlist, NULL, NULL, 0));
cmd_list_free(pr->cmdlist);
}
}
static enum cmd_retval
key_bindings_read_only(struct cmdq_item *item, __unused void *data)
{
cmdq_error(item, "client is read-only");
return (CMD_RETURN_ERROR);
}
struct cmdq_item *
key_bindings_dispatch(struct key_binding *bd, struct cmdq_item *item,
struct client *c, struct mouse_event *m, struct cmd_find_state *fs)
{
struct cmd *cmd;
struct cmdq_item *new_item;
int readonly;
readonly = 1;
TAILQ_FOREACH(cmd, &bd->cmdlist->list, qentry) {
if (!(cmd->entry->flags & CMD_READONLY))
readonly = 0;
}
if (!readonly && (c->flags & CLIENT_READONLY))
new_item = cmdq_get_callback(key_bindings_read_only, NULL);
else {
new_item = cmdq_get_command(bd->cmdlist, fs, m, 0);
if (bd->flags & KEY_BINDING_REPEAT)
new_item->shared->flags |= CMDQ_SHARED_REPEAT;
}
if (item != NULL)
cmdq_insert_after(item, new_item);
else
cmdq_append(c, new_item);
return (new_item);
}
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