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293 lines
8.4 KiB
293 lines
8.4 KiB
#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_input_device.h>
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#include <wlr/types/wlr_pointer.h>
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#include <wlr/backend/multi.h>
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#include <wlr/backend/session.h>
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#include <wlr/util/log.h>
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#include <xkbcommon/xkbcommon.h>
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#include "rootston/input.h"
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#include "rootston/seat.h"
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#include "rootston/keyboard.h"
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static ssize_t keyboard_pressed_keysym_index(struct roots_keyboard *keyboard,
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xkb_keysym_t keysym) {
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for (size_t i = 0; i < ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP; i++) {
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if (keyboard->pressed_keysyms[i] == keysym) {
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return i;
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}
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}
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return -1;
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}
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static const char *exec_prefix = "exec ";
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static void keyboard_binding_execute(struct roots_keyboard *keyboard,
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const char *command) {
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struct roots_server *server = keyboard->input->server;
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if (strcmp(command, "exit") == 0) {
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wl_display_terminate(server->wl_display);
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} else if (strcmp(command, "close") == 0) {
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if (server->desktop->views->length > 0) {
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struct roots_view *view =
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server->desktop->views->items[server->desktop->views->length-1];
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view_close(view);
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}
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} else if (strcmp(command, "next_window") == 0) {
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if (server->desktop->views->length > 0) {
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struct roots_view *view = server->desktop->views->items[0];
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roots_seat_focus_view(keyboard->seat, view);
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}
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} else if (strncmp(exec_prefix, command, strlen(exec_prefix)) == 0) {
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const char *shell_cmd = command + strlen(exec_prefix);
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pid_t pid = fork();
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if (pid < 0) {
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wlr_log(L_ERROR, "cannot execute binding command: fork() failed");
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return;
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} else if (pid == 0) {
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execl("/bin/sh", "/bin/sh", "-c", shell_cmd, (void *)NULL);
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}
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} else {
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wlr_log(L_ERROR, "unknown binding command: %s", command);
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}
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}
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/**
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* Process a keypress from the keyboard.
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*
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* Returns true if the keysym was handled by a binding and false if the event
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* should be propagated to clients.
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*/
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static bool keyboard_keysym_press(struct roots_keyboard *keyboard,
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xkb_keysym_t keysym) {
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ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
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if (i < 0) {
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i = keyboard_pressed_keysym_index(keyboard, XKB_KEY_NoSymbol);
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if (i >= 0) {
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keyboard->pressed_keysyms[i] = keysym;
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}
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}
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if (keysym >= XKB_KEY_XF86Switch_VT_1 &&
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keysym <= XKB_KEY_XF86Switch_VT_12) {
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struct roots_server *server = keyboard->input->server;
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if (wlr_backend_is_multi(server->backend)) {
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struct wlr_session *session =
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wlr_multi_get_session(server->backend);
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if (session) {
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unsigned vt = keysym - XKB_KEY_XF86Switch_VT_1 + 1;
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wlr_session_change_vt(session, vt);
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}
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}
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return true;
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}
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if (keysym == XKB_KEY_Escape) {
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wlr_seat_pointer_end_grab(keyboard->seat->seat);
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wlr_seat_keyboard_end_grab(keyboard->seat->seat);
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}
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uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
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struct wl_list *bindings = &keyboard->input->server->config->bindings;
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struct binding_config *bc;
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wl_list_for_each(bc, bindings, link) {
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if (modifiers ^ bc->modifiers) {
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continue;
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}
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bool ok = true;
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for (size_t i = 0; i < bc->keysyms_len; i++) {
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ssize_t j = keyboard_pressed_keysym_index(keyboard, bc->keysyms[i]);
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if (j < 0) {
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ok = false;
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break;
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}
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}
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if (ok) {
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keyboard_binding_execute(keyboard, bc->command);
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return true;
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}
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}
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return false;
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}
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static void keyboard_keysym_release(struct roots_keyboard *keyboard,
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xkb_keysym_t keysym) {
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ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
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if (i >= 0) {
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keyboard->pressed_keysyms[i] = XKB_KEY_NoSymbol;
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}
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}
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/*
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* Process keypresses from the keyboard as xkb sees them.
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*
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* This uses the xkb keysyms translation based on pressed modifiers and clears
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* the consumed modifiers from the list of modifiers passed to keybind
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* detection.
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*
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* (On US layout) this will trigger: [Alt]+[at]
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*/
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static bool keyboard_keysyms_xkb(struct roots_keyboard *keyboard,
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uint32_t keycode, enum wlr_key_state state) {
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uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
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const xkb_keysym_t *syms;
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int syms_len = xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,
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keycode, &syms);
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uint32_t consumed = xkb_state_key_get_consumed_mods2(
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keyboard->device->keyboard->xkb_state, keycode, XKB_CONSUMED_MODE_XKB);
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modifiers = modifiers & ~consumed;
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bool handled = false;
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for (int i = 0; i < syms_len; i++) {
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if (state) {
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bool keysym_handled =
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keyboard_keysym_press(keyboard, syms[i]);
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handled = handled || keysym_handled;
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} else { // WLR_KEY_RELEASED
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keyboard_keysym_release(keyboard, syms[i]);
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}
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}
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return handled;
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}
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/*
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* Process keypresses from the keyboard as if modifiers didn't change keysyms.
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*
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* This avoids the xkb keysym translation based on modifiers considered pressed
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* in the state and uses the list of modifiers saved on the rootston side.
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*
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* This will trigger the keybind: [Alt]+[Shift]+2
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*/
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static bool keyboard_keysyms_simple(struct roots_keyboard *keyboard,
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uint32_t keycode, enum wlr_key_state state) {
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const xkb_keysym_t *syms;
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xkb_layout_index_t layout_index = xkb_state_key_get_layout(
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keyboard->device->keyboard->xkb_state, keycode);
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int syms_len = xkb_keymap_key_get_syms_by_level(
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keyboard->device->keyboard->keymap, keycode, layout_index, 0, &syms);
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bool handled = false;
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for (int i = 0; i < syms_len; i++) {
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if (state) {
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bool keysym_handled = keyboard_keysym_press(keyboard, syms[i]);
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handled = handled || keysym_handled;
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} else { // WLR_KEY_RELEASED
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keyboard_keysym_release(keyboard, syms[i]);
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}
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}
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return handled;
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}
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void roots_keyboard_handle_key(struct roots_keyboard *keyboard,
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struct wlr_event_keyboard_key *event) {
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uint32_t keycode = event->keycode + 8;
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bool handled = keyboard_keysyms_xkb(keyboard, keycode, event->state);
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if (!handled) {
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bool key_handled = keyboard_keysyms_simple(keyboard, keycode,
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event->state);
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handled = handled || key_handled;
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}
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if (!handled) {
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wlr_seat_set_keyboard(keyboard->seat->seat, keyboard->device);
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wlr_seat_keyboard_notify_key(keyboard->seat->seat, event->time_msec,
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event->keycode, event->state);
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}
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}
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void roots_keyboard_handle_modifiers(struct roots_keyboard *r_keyboard) {
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struct wlr_seat *seat = r_keyboard->seat->seat;
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wlr_seat_set_keyboard(seat, r_keyboard->device);
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wlr_seat_keyboard_notify_modifiers(seat);
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}
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static void keyboard_config_merge(struct keyboard_config *config,
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struct keyboard_config *fallback) {
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if (fallback == NULL) {
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return;
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}
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if (config->rules == NULL) {
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config->rules = fallback->rules;
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}
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if (config->model == NULL) {
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config->model = fallback->model;
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}
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if (config->layout == NULL) {
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config->layout = fallback->layout;
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}
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if (config->variant == NULL) {
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config->variant = fallback->variant;
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}
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if (config->options == NULL) {
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config->options = fallback->options;
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}
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if (config->meta_key == 0) {
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config->meta_key = fallback->meta_key;
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}
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if (config->name == NULL) {
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config->name = fallback->name;
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}
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}
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struct roots_keyboard *roots_keyboard_create(struct wlr_input_device *device,
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struct roots_input *input) {
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struct roots_keyboard *keyboard = calloc(sizeof(struct roots_keyboard), 1);
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if (keyboard == NULL) {
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return NULL;
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}
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device->data = keyboard;
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keyboard->device = device;
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keyboard->input = input;
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struct keyboard_config *config = calloc(1, sizeof(struct keyboard_config));
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if (config == NULL) {
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free(keyboard);
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return NULL;
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}
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keyboard_config_merge(config, config_get_keyboard(input->config, device));
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keyboard_config_merge(config, config_get_keyboard(input->config, NULL));
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struct keyboard_config env_config = {
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.rules = getenv("XKB_DEFAULT_RULES"),
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.model = getenv("XKB_DEFAULT_MODEL"),
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.layout = getenv("XKB_DEFAULT_LAYOUT"),
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.variant = getenv("XKB_DEFAULT_VARIANT"),
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.options = getenv("XKB_DEFAULT_OPTIONS"),
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};
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keyboard_config_merge(config, &env_config);
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keyboard->config = config;
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struct xkb_rule_names rules;
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memset(&rules, 0, sizeof(rules));
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rules.rules = config->rules;
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rules.model = config->model;
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rules.layout = config->layout;
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rules.variant = config->variant;
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rules.options = config->options;
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struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
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if (context == NULL) {
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wlr_log(L_ERROR, "Cannot create XKB context");
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return NULL;
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}
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wlr_keyboard_set_keymap(device->keyboard, xkb_map_new_from_names(context,
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&rules, XKB_KEYMAP_COMPILE_NO_FLAGS));
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xkb_context_unref(context);
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return keyboard;
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}
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void roots_keyboard_destroy(struct roots_keyboard *keyboard) {
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wl_list_remove(&keyboard->link);
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free(keyboard->config);
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free(keyboard);
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}
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