swayfx/sway/commands/bind.c

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#define _POSIX_C_SOURCE 200809L
#include <libevdev/libevdev.h>
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#include <linux/input-event-codes.h>
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#include <string.h>
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#include <strings.h>
#include <xkbcommon/xkbcommon.h>
#include <xkbcommon/xkbcommon-names.h>
#include <wlr/types/wlr_cursor.h>
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#include "sway/commands.h"
#include "sway/config.h"
#include "sway/input/cursor.h"
#include "sway/input/keyboard.h"
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#include "sway/ipc-server.h"
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#include "list.h"
#include "log.h"
#include "stringop.h"
#include "util.h"
int binding_order = 0;
void free_sway_binding(struct sway_binding *binding) {
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if (!binding) {
return;
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}
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list_free_items_and_destroy(binding->keys);
list_free_items_and_destroy(binding->syms);
free(binding->input);
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free(binding->command);
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free(binding);
}
void free_switch_binding(struct sway_switch_binding *binding) {
if (!binding) {
return;
}
free(binding->command);
free(binding);
}
/**
* Returns true if the bindings have the same switch type and state combinations.
*/
static bool binding_switch_compare(struct sway_switch_binding *binding_a,
struct sway_switch_binding *binding_b) {
if (binding_a->type != binding_b->type) {
return false;
}
if (binding_a->state != binding_b->state) {
return false;
}
if ((binding_a->flags & BINDING_LOCKED) !=
(binding_b->flags & BINDING_LOCKED)) {
return false;
}
return true;
}
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/**
* Returns true if the bindings have the same key and modifier combinations.
* Note that keyboard layout is not considered, so the bindings might actually
* not be equivalent on some layouts.
*/
static bool binding_key_compare(struct sway_binding *binding_a,
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struct sway_binding *binding_b) {
if (strcmp(binding_a->input, binding_b->input) != 0) {
return false;
}
if (binding_a->type != binding_b->type) {
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return false;
}
uint32_t conflict_generating_flags = BINDING_RELEASE | BINDING_BORDER
| BINDING_CONTENTS | BINDING_TITLEBAR | BINDING_LOCKED
| BINDING_INHIBITED;
if ((binding_a->flags & conflict_generating_flags) !=
(binding_b->flags & conflict_generating_flags)) {
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return false;
}
if (binding_a->group != binding_b->group) {
return false;
}
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if (binding_a->modifiers ^ binding_b->modifiers) {
return false;
}
if (binding_a->keys->length != binding_b->keys->length) {
return false;
}
// Keys are sorted
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int keys_len = binding_a->keys->length;
for (int i = 0; i < keys_len; ++i) {
uint32_t key_a = *(uint32_t *)binding_a->keys->items[i];
uint32_t key_b = *(uint32_t *)binding_b->keys->items[i];
if (key_a != key_b) {
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return false;
}
}
return true;
}
static int key_qsort_cmp(const void *keyp_a, const void *keyp_b) {
uint32_t key_a = **(uint32_t **)keyp_a;
uint32_t key_b = **(uint32_t **)keyp_b;
return (key_a < key_b) ? -1 : ((key_a > key_b) ? 1 : 0);
}
/**
* From a keycode, bindcode, or bindsym name and the most likely binding type,
* identify the appropriate numeric value corresponding to the key. Return NULL
* and set *key_val if successful, otherwise return a specific error. Change
* the value of *type if the initial type guess was incorrect and if this
* was the first identified key.
*/
static struct cmd_results *identify_key(const char* name, bool first_key,
uint32_t* key_val, enum binding_input_type* type) {
if (*type == BINDING_MOUSECODE) {
// check for mouse bindcodes
char *message = NULL;
uint32_t button = get_mouse_bindcode(name, &message);
if (!button) {
if (message) {
struct cmd_results *error =
cmd_results_new(CMD_INVALID, message);
free(message);
return error;
} else {
return cmd_results_new(CMD_INVALID,
"Unknown button code %s", name);
}
}
*key_val = button;
} else if (*type == BINDING_MOUSESYM) {
// check for mouse bindsyms (x11 buttons or event names)
char *message = NULL;
uint32_t button = get_mouse_bindsym(name, &message);
if (!button) {
if (message) {
struct cmd_results *error =
cmd_results_new(CMD_INVALID, message);
free(message);
return error;
} else {
return cmd_results_new(CMD_INVALID, "Unknown button %s", name);
}
}
*key_val = button;
} else if (*type == BINDING_KEYCODE) {
// check for keycode. If it is the first key, allow mouse bindcodes
if (first_key) {
char *message = NULL;
uint32_t button = get_mouse_bindcode(name, &message);
free(message);
if (button) {
*type = BINDING_MOUSECODE;
*key_val = button;
return NULL;
}
}
xkb_keycode_t keycode = strtol(name, NULL, 10);
if (!xkb_keycode_is_legal_ext(keycode)) {
if (first_key) {
return cmd_results_new(CMD_INVALID,
"Invalid keycode or button code '%s'", name);
} else {
return cmd_results_new(CMD_INVALID,
"Invalid keycode '%s'", name);
}
}
*key_val = keycode;
} else {
// check for keysym. If it is the first key, allow mouse bindsyms
if (first_key) {
char *message = NULL;
uint32_t button = get_mouse_bindsym(name, &message);
if (message) {
struct cmd_results *error =
cmd_results_new(CMD_INVALID, message);
free(message);
return error;
} else if (button) {
*type = BINDING_MOUSESYM;
*key_val = button;
return NULL;
}
}
xkb_keysym_t keysym = xkb_keysym_from_name(name,
XKB_KEYSYM_CASE_INSENSITIVE);
if (!keysym) {
if (first_key) {
return cmd_results_new(CMD_INVALID,
"Unknown key or button '%s'", name);
} else {
return cmd_results_new(CMD_INVALID, "Unknown key '%s'", name);
}
}
*key_val = keysym;
}
return NULL;
}
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static struct cmd_results *switch_binding_add(
struct sway_switch_binding *binding, const char *bindtype,
const char *switchcombo, bool warn) {
list_t *mode_bindings = config->current_mode->switch_bindings;
// overwrite the binding if it already exists
bool overwritten = false;
for (int i = 0; i < mode_bindings->length; ++i) {
struct sway_switch_binding *config_binding = mode_bindings->items[i];
if (binding_switch_compare(binding, config_binding)) {
sway_log(SWAY_INFO, "Overwriting binding '%s' to `%s` from `%s`",
switchcombo, binding->command, config_binding->command);
if (warn) {
config_add_swaynag_warning("Overwriting binding"
"'%s' to `%s` from `%s`",
switchcombo, binding->command,
config_binding->command);
}
free_switch_binding(config_binding);
mode_bindings->items[i] = binding;
overwritten = true;
}
}
if (!overwritten) {
list_add(mode_bindings, binding);
sway_log(SWAY_DEBUG, "%s - Bound %s to command `%s`",
bindtype, switchcombo, binding->command);
}
return cmd_results_new(CMD_SUCCESS, NULL);
}
static struct cmd_results *switch_binding_remove(
struct sway_switch_binding *binding, const char *bindtype,
const char *switchcombo) {
list_t *mode_bindings = config->current_mode->switch_bindings;
for (int i = 0; i < mode_bindings->length; ++i) {
struct sway_switch_binding *config_binding = mode_bindings->items[i];
if (binding_switch_compare(binding, config_binding)) {
free_switch_binding(config_binding);
free_switch_binding(binding);
list_del(mode_bindings, i);
sway_log(SWAY_DEBUG, "%s - Unbound %s switch",
bindtype, switchcombo);
return cmd_results_new(CMD_SUCCESS, NULL);
}
}
free_switch_binding(binding);
return cmd_results_new(CMD_FAILURE, "Could not find switch binding `%s`",
switchcombo);
}
/**
* Insert or update the binding.
* Return the binding which has been replaced or NULL.
*/
static struct sway_binding *binding_upsert(struct sway_binding *binding,
list_t *mode_bindings) {
for (int i = 0; i < mode_bindings->length; ++i) {
struct sway_binding *config_binding = mode_bindings->items[i];
if (binding_key_compare(binding, config_binding)) {
mode_bindings->items[i] = binding;
return config_binding;
}
}
list_add(mode_bindings, binding);
return NULL;
}
static struct cmd_results *binding_add(struct sway_binding *binding,
list_t *mode_bindings, const char *bindtype,
const char *keycombo, bool warn) {
struct sway_binding *config_binding = binding_upsert(binding, mode_bindings);
if (config_binding) {
sway_log(SWAY_INFO, "Overwriting binding '%s' for device '%s' "
"to `%s` from `%s`", keycombo, binding->input,
binding->command, config_binding->command);
if (warn) {
config_add_swaynag_warning("Overwriting binding"
"'%s' for device '%s' to `%s` from `%s`",
keycombo, binding->input, binding->command,
config_binding->command);
}
free_sway_binding(config_binding);
} else {
sway_log(SWAY_DEBUG, "%s - Bound %s to command `%s` for device '%s'",
bindtype, keycombo, binding->command, binding->input);
}
return cmd_results_new(CMD_SUCCESS, NULL);
}
static struct cmd_results *binding_remove(struct sway_binding *binding,
list_t *mode_bindings, const char *bindtype,
const char *keycombo) {
for (int i = 0; i < mode_bindings->length; ++i) {
struct sway_binding *config_binding = mode_bindings->items[i];
if (binding_key_compare(binding, config_binding)) {
sway_log(SWAY_DEBUG, "%s - Unbound `%s` from device '%s'",
bindtype, keycombo, binding->input);
free_sway_binding(config_binding);
free_sway_binding(binding);
list_del(mode_bindings, i);
return cmd_results_new(CMD_SUCCESS, NULL);
}
}
free_sway_binding(binding);
return cmd_results_new(CMD_FAILURE, "Could not find binding `%s` "
"for the given flags", keycombo);
}
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static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
bool bindcode, bool unbind) {
const char *bindtype;
int minargs = 2;
if (unbind) {
bindtype = bindcode ? "unbindcode" : "unbindsym";
minargs--;
} else {
bindtype = bindcode ? "bindcode": "bindsym";
}
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struct cmd_results *error = NULL;
if ((error = checkarg(argc, bindtype, EXPECTED_AT_LEAST, minargs))) {
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return error;
}
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struct sway_binding *binding = calloc(1, sizeof(struct sway_binding));
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if (!binding) {
return cmd_results_new(CMD_FAILURE, "Unable to allocate binding");
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}
binding->input = strdup("*");
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binding->keys = create_list();
binding->group = XKB_LAYOUT_INVALID;
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binding->modifiers = 0;
binding->flags = 0;
binding->type = bindcode ? BINDING_KEYCODE : BINDING_KEYSYM;
bool exclude_titlebar = false;
bool warn = true;
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while (argc > 0) {
if (strcmp("--release", argv[0]) == 0) {
binding->flags |= BINDING_RELEASE;
} else if (strcmp("--locked", argv[0]) == 0) {
binding->flags |= BINDING_LOCKED;
} else if (strcmp("--inhibited", argv[0]) == 0) {
binding->flags |= BINDING_INHIBITED;
} else if (strcmp("--whole-window", argv[0]) == 0) {
binding->flags |= BINDING_BORDER | BINDING_CONTENTS | BINDING_TITLEBAR;
} else if (strcmp("--border", argv[0]) == 0) {
binding->flags |= BINDING_BORDER;
} else if (strcmp("--to-code", argv[0]) == 0) {
if (!bindcode) {
binding->flags |= BINDING_CODE;
}
} else if (strcmp("--exclude-titlebar", argv[0]) == 0) {
exclude_titlebar = true;
} else if (strncmp("--input-device=", argv[0],
strlen("--input-device=")) == 0) {
free(binding->input);
binding->input = strdup(argv[0] + strlen("--input-device="));
} else if (strcmp("--no-warn", argv[0]) == 0) {
warn = false;
} else if (strcmp("--no-repeat", argv[0]) == 0) {
binding->flags |= BINDING_NOREPEAT;
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} else {
break;
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}
argv++;
argc--;
}
if (binding->flags & (BINDING_BORDER | BINDING_CONTENTS | BINDING_TITLEBAR)
|| exclude_titlebar) {
binding->type = binding->type == BINDING_KEYCODE ?
BINDING_MOUSECODE : BINDING_MOUSESYM;
}
if (argc < minargs) {
free_sway_binding(binding);
return cmd_results_new(CMD_FAILURE,
"Invalid %s command "
"(expected at least %d non-option arguments, got %d)",
bindtype, minargs, argc);
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}
list_t *split = split_string(argv[0], "+");
for (int i = 0; i < split->length; ++i) {
// Check for group
if (strncmp(split->items[i], "Group", strlen("Group")) == 0) {
if (binding->group != XKB_LAYOUT_INVALID) {
free_sway_binding(binding);
list_free_items_and_destroy(split);
return cmd_results_new(CMD_FAILURE,
"Only one group can be specified");
}
char *end;
int group = strtol(split->items[i] + strlen("Group"), &end, 10);
if (group < 1 || group > 4 || end[0] != '\0') {
free_sway_binding(binding);
list_free_items_and_destroy(split);
return cmd_results_new(CMD_FAILURE, "Invalid group");
}
binding->group = group - 1;
continue;
} else if (strcmp(split->items[i], "Mode_switch") == 0) {
// For full i3 compatibility, Mode_switch is an alias for Group2
if (binding->group != XKB_LAYOUT_INVALID) {
free_sway_binding(binding);
list_free_items_and_destroy(split);
return cmd_results_new(CMD_FAILURE,
"Only one group can be specified");
}
binding->group = 1;
}
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// Check for a modifier key
uint32_t mod;
if ((mod = get_modifier_mask_by_name(split->items[i])) > 0) {
binding->modifiers |= mod;
continue;
}
// Identify the key and possibly change binding->type
uint32_t key_val = 0;
error = identify_key(split->items[i], binding->keys->length == 0,
&key_val, &binding->type);
if (error) {
free_sway_binding(binding);
list_free(split);
return error;
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}
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uint32_t *key = calloc(1, sizeof(uint32_t));
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if (!key) {
free_sway_binding(binding);
list_free_items_and_destroy(split);
return cmd_results_new(CMD_FAILURE,
"Unable to allocate binding key");
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}
*key = key_val;
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list_add(binding->keys, key);
}
list_free_items_and_destroy(split);
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// refine region of interest for mouse binding once we are certain
// that this is one
if (exclude_titlebar) {
binding->flags &= ~BINDING_TITLEBAR;
} else if (binding->type == BINDING_MOUSECODE
|| binding->type == BINDING_MOUSESYM) {
binding->flags |= BINDING_TITLEBAR;
}
// sort ascending
list_qsort(binding->keys, key_qsort_cmp);
// translate keysyms into keycodes
if (!translate_binding(binding)) {
sway_log(SWAY_INFO,
"Unable to translate bindsym into bindcode: %s", argv[0]);
}
list_t *mode_bindings;
if (binding->type == BINDING_KEYCODE) {
mode_bindings = config->current_mode->keycode_bindings;
} else if (binding->type == BINDING_KEYSYM) {
mode_bindings = config->current_mode->keysym_bindings;
} else {
mode_bindings = config->current_mode->mouse_bindings;
}
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if (unbind) {
return binding_remove(binding, mode_bindings, bindtype, argv[0]);
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}
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binding->command = join_args(argv + 1, argc - 1);
binding->order = binding_order++;
return binding_add(binding, mode_bindings, bindtype, argv[0], warn);
}
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struct cmd_results *cmd_bind_or_unbind_switch(int argc, char **argv,
bool unbind) {
int minargs = 2;
char *bindtype = "bindswitch";
if (unbind) {
minargs--;
bindtype = "unbindswitch";
}
struct cmd_results *error = NULL;
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if ((error = checkarg(argc, bindtype, EXPECTED_AT_LEAST, minargs))) {
return error;
}
struct sway_switch_binding *binding = calloc(1, sizeof(struct sway_switch_binding));
if (!binding) {
return cmd_results_new(CMD_FAILURE, "Unable to allocate binding");
}
bool warn = true;
// Handle flags
while (argc > 0) {
if (strcmp("--locked", argv[0]) == 0) {
binding->flags |= BINDING_LOCKED;
} else if (strcmp("--no-warn", argv[0]) == 0) {
warn = false;
} else if (strcmp("--reload", argv[0]) == 0) {
binding->flags |= BINDING_RELOAD;
} else {
break;
}
argv++;
argc--;
}
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if (argc < minargs) {
free(binding);
return cmd_results_new(CMD_FAILURE,
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"Invalid %s command (expected at least %d "
"non-option arguments, got %d)", bindtype, minargs, argc);
}
list_t *split = split_string(argv[0], ":");
if (split->length != 2) {
free_switch_binding(binding);
return cmd_results_new(CMD_FAILURE,
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"Invalid %s command (expected binding with the form "
"<switch>:<state>)", bindtype, argc);
}
if (strcmp(split->items[0], "tablet") == 0) {
binding->type = WLR_SWITCH_TYPE_TABLET_MODE;
} else if (strcmp(split->items[0], "lid") == 0) {
binding->type = WLR_SWITCH_TYPE_LID;
} else {
free_switch_binding(binding);
return cmd_results_new(CMD_FAILURE,
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"Invalid %s command (expected switch binding: "
"unknown switch %s)", bindtype, split->items[0]);
}
if (strcmp(split->items[1], "on") == 0) {
binding->state = WLR_SWITCH_STATE_ON;
} else if (strcmp(split->items[1], "off") == 0) {
binding->state = WLR_SWITCH_STATE_OFF;
} else if (strcmp(split->items[1], "toggle") == 0) {
binding->state = WLR_SWITCH_STATE_TOGGLE;
} else {
free_switch_binding(binding);
return cmd_results_new(CMD_FAILURE,
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"Invalid %s command "
"(expected switch state: unknown state %d)",
bindtype, split->items[0]);
}
list_free_items_and_destroy(split);
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if (unbind) {
return switch_binding_remove(binding, bindtype, argv[0]);
}
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binding->command = join_args(argv + 1, argc - 1);
return switch_binding_add(binding, bindtype, argv[0], warn);
}
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struct cmd_results *cmd_bindsym(int argc, char **argv) {
return cmd_bindsym_or_bindcode(argc, argv, false, false);
}
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struct cmd_results *cmd_bindcode(int argc, char **argv) {
return cmd_bindsym_or_bindcode(argc, argv, true, false);
}
struct cmd_results *cmd_unbindsym(int argc, char **argv) {
return cmd_bindsym_or_bindcode(argc, argv, false, true);
}
struct cmd_results *cmd_unbindcode(int argc, char **argv) {
return cmd_bindsym_or_bindcode(argc, argv, true, true);
}
struct cmd_results *cmd_bindswitch(int argc, char **argv) {
return cmd_bind_or_unbind_switch(argc, argv, false);
}
struct cmd_results *cmd_unbindswitch(int argc, char **argv) {
return cmd_bind_or_unbind_switch(argc, argv, true);
}
/**
* Execute the command associated to a binding
*/
void seat_execute_command(struct sway_seat *seat, struct sway_binding *binding) {
if (!config->active) {
sway_log(SWAY_DEBUG, "deferring command for binding: %s",
binding->command);
struct sway_binding *deferred = calloc(1, sizeof(struct sway_binding));
if (!deferred) {
sway_log(SWAY_ERROR, "Failed to allocate deferred binding");
return;
}
memcpy(deferred, binding, sizeof(struct sway_binding));
deferred->command = binding->command ? strdup(binding->command) : NULL;
list_add(seat->deferred_bindings, deferred);
return;
}
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sway_log(SWAY_DEBUG, "running command for binding: %s", binding->command);
struct sway_container *con = NULL;
if (binding->type == BINDING_MOUSESYM
|| binding->type == BINDING_MOUSECODE) {
struct wlr_surface *surface = NULL;
double sx, sy;
struct sway_node *node = node_at_coords(seat,
seat->cursor->cursor->x, seat->cursor->cursor->y,
&surface, &sx, &sy);
if (node && node->type == N_CONTAINER) {
con = node->sway_container;
}
}
list_t *res_list = execute_command(binding->command, seat, con);
bool success = true;
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for (int i = 0; i < res_list->length; ++i) {
struct cmd_results *results = res_list->items[i];
if (results->status != CMD_SUCCESS) {
sway_log(SWAY_DEBUG, "could not run command for binding: %s (%s)",
binding->command, results->error);
success = false;
}
free_cmd_results(results);
}
list_free(res_list);
if (success) {
ipc_event_binding(binding);
}
}
/**
* The last found keycode associated with the keysym
* and the total count of matches.
*/
struct keycode_matches {
xkb_keysym_t keysym;
xkb_keycode_t keycode;
int count;
};
/**
* Iterate through keycodes in the keymap to find ones matching
* the specified keysym.
*/
static void find_keycode(struct xkb_keymap *keymap,
xkb_keycode_t keycode, void *data) {
xkb_keysym_t keysym = xkb_state_key_get_one_sym(
config->keysym_translation_state, keycode);
if (keysym == XKB_KEY_NoSymbol) {
return;
}
struct keycode_matches *matches = data;
if (matches->keysym == keysym) {
matches->keycode = keycode;
matches->count++;
}
}
/**
* Return the keycode for the specified keysym.
*/
static struct keycode_matches get_keycode_for_keysym(xkb_keysym_t keysym) {
struct keycode_matches matches = {
.keysym = keysym,
.keycode = XKB_KEYCODE_INVALID,
.count = 0,
};
xkb_keymap_key_for_each(
xkb_state_get_keymap(config->keysym_translation_state),
find_keycode, &matches);
return matches;
}
bool translate_binding(struct sway_binding *binding) {
if ((binding->flags & BINDING_CODE) == 0) {
return true;
}
switch (binding->type) {
// a bindsym to translate
case BINDING_KEYSYM:
binding->syms = binding->keys;
binding->keys = create_list();
break;
// a bindsym to re-translate
case BINDING_KEYCODE:
list_free_items_and_destroy(binding->keys);
binding->keys = create_list();
break;
default:
return true;
}
for (int i = 0; i < binding->syms->length; ++i) {
xkb_keysym_t *keysym = binding->syms->items[i];
struct keycode_matches matches = get_keycode_for_keysym(*keysym);
if (matches.count != 1) {
sway_log(SWAY_INFO, "Unable to convert keysym %d into"
" a single keycode (found %d matches)",
*keysym, matches.count);
goto error;
}
xkb_keycode_t *keycode = malloc(sizeof(xkb_keycode_t));
if (!keycode) {
sway_log(SWAY_ERROR, "Unable to allocate memory for a keycode");
goto error;
}
*keycode = matches.keycode;
list_add(binding->keys, keycode);
}
list_qsort(binding->keys, key_qsort_cmp);
binding->type = BINDING_KEYCODE;
return true;
error:
list_free_items_and_destroy(binding->keys);
binding->type = BINDING_KEYSYM;
binding->keys = binding->syms;
binding->syms = NULL;
return false;
}
void binding_add_translated(struct sway_binding *binding,
list_t *mode_bindings) {
struct sway_binding *config_binding =
binding_upsert(binding, mode_bindings);
if (config_binding) {
sway_log(SWAY_INFO, "Overwriting binding for device '%s' "
"to `%s` from `%s`", binding->input,
binding->command, config_binding->command);
free_sway_binding(config_binding);
}
}