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#include <assert.h>
#include <wlr/interfaces/wlr_keyboard.h>
#include "sway/config.h"
#include "sway/commands.h"
#include "sway/input/input-manager.h"
#include "log.h"
struct xkb_switch_layout_action {
struct wlr_keyboard *keyboard;
xkb_layout_index_t layout;
};
static void switch_layout(struct wlr_keyboard *kbd, xkb_layout_index_t idx) {
xkb_layout_index_t num_layouts = xkb_keymap_num_layouts(kbd->keymap);
if (idx >= num_layouts) {
return;
}
wlr_keyboard_notify_modifiers(kbd, kbd->modifiers.depressed,
kbd->modifiers.latched, kbd->modifiers.locked, idx);
}
static xkb_layout_index_t get_current_layout_index(struct wlr_keyboard *kbd) {
xkb_layout_index_t num_layouts = xkb_keymap_num_layouts(kbd->keymap);
assert(num_layouts > 0);
xkb_layout_index_t layout_idx;
for (layout_idx = 0; layout_idx < num_layouts; layout_idx++) {
if (xkb_state_layout_index_is_active(kbd->xkb_state,
layout_idx, XKB_STATE_LAYOUT_EFFECTIVE)) {
break;
}
}
return layout_idx;
}
static xkb_layout_index_t get_layout_relative(struct wlr_keyboard *kbd, int dir) {
xkb_layout_index_t num_layouts = xkb_keymap_num_layouts(kbd->keymap);
xkb_layout_index_t idx = get_current_layout_index(kbd);
return (idx + num_layouts + dir) % num_layouts;
}
struct cmd_results *input_cmd_xkb_switch_layout(int argc, char **argv) {
struct cmd_results *error = NULL;
if ((error = checkarg(argc, "xkb_switch_layout", EXPECTED_EQUAL_TO, 1))) {
return error;
}
struct input_config *ic = config->handler_context.input_config;
if (!ic) {
return cmd_results_new(CMD_FAILURE, "No input device defined.");
}
if (config->reading || !config->active) {
return cmd_results_new(CMD_DEFER, NULL);
}
const char *layout_str = argv[0];
int relative, layout;
if (strcmp(layout_str, "next") == 0) {
relative = 1;
} else if (strcmp(layout_str, "prev") == 0) {
relative = -1;
} else {
char *end;
layout = strtol(layout_str, &end, 10);
if (layout_str[0] == '\0' || end[0] != '\0') {
return cmd_results_new(CMD_FAILURE, "Invalid argument.");
} else if (layout < 0) {
return cmd_results_new(CMD_FAILURE, "Invalid layout index.");
}
relative = 0;
}
struct xkb_switch_layout_action *actions = calloc(
wl_list_length(&server.input->devices),
sizeof(struct xkb_switch_layout_action));
size_t actions_len = 0;
if (!actions) {
return cmd_results_new(CMD_FAILURE, "Unable to allocate actions");
}
/* Calculate new indexes first because switching a layout in one
keyboard may result in a change on other keyboards as well because
of keyboard groups. */
struct sway_input_device *dev;
wl_list_for_each(dev, &server.input->devices, link) {
if (strcmp(ic->identifier, "*") != 0 &&
strcmp(ic->identifier, "type:keyboard") != 0 &&
strcmp(ic->identifier, dev->identifier) != 0) {
continue;
}
if (dev->wlr_device->type != WLR_INPUT_DEVICE_KEYBOARD) {
continue;
}
struct xkb_switch_layout_action *action =
&actions[actions_len++];
action->keyboard = wlr_keyboard_from_input_device(dev->wlr_device);
if (relative) {
action->layout = get_layout_relative(action->keyboard, relative);
} else {
action->layout = layout;
}
}
for (size_t i = 0; i < actions_len; i++) {
switch_layout(actions[i].keyboard, actions[i].layout);
}
free(actions);
return cmd_results_new(CMD_SUCCESS, NULL);
}
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