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350 lines
10 KiB
350 lines
10 KiB
#include <assert.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <wayland-server-core.h>
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#include <wlr/backend/session.h>
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#include <wlr/types/wlr_input_device.h>
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#include <wlr/types/wlr_pointer_constraints_v1.h>
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#include <wlr/types/wlr_pointer.h>
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#include <wlr/util/log.h>
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#include <xkbcommon/xkbcommon.h>
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#include "rootston/bindings.h"
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#include "rootston/input.h"
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#include "rootston/keyboard.h"
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#include "rootston/seat.h"
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static ssize_t pressed_keysyms_index(xkb_keysym_t *pressed_keysyms,
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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 (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 size_t pressed_keysyms_length(xkb_keysym_t *pressed_keysyms) {
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size_t n = 0;
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for (size_t i = 0; i < ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP; ++i) {
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if (pressed_keysyms[i] != XKB_KEY_NoSymbol) {
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++n;
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}
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}
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return n;
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}
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static void pressed_keysyms_add(xkb_keysym_t *pressed_keysyms,
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xkb_keysym_t keysym) {
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ssize_t i = pressed_keysyms_index(pressed_keysyms, keysym);
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if (i < 0) {
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i = pressed_keysyms_index(pressed_keysyms, XKB_KEY_NoSymbol);
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if (i >= 0) {
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pressed_keysyms[i] = keysym;
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}
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}
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}
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static void pressed_keysyms_remove(xkb_keysym_t *pressed_keysyms,
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xkb_keysym_t keysym) {
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ssize_t i = pressed_keysyms_index(pressed_keysyms, keysym);
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if (i >= 0) {
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pressed_keysyms[i] = XKB_KEY_NoSymbol;
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}
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}
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static bool keysym_is_modifier(xkb_keysym_t keysym) {
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switch (keysym) {
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case XKB_KEY_Shift_L: case XKB_KEY_Shift_R:
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case XKB_KEY_Control_L: case XKB_KEY_Control_R:
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case XKB_KEY_Caps_Lock:
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case XKB_KEY_Shift_Lock:
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case XKB_KEY_Meta_L: case XKB_KEY_Meta_R:
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case XKB_KEY_Alt_L: case XKB_KEY_Alt_R:
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case XKB_KEY_Super_L: case XKB_KEY_Super_R:
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case XKB_KEY_Hyper_L: case XKB_KEY_Hyper_R:
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return true;
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default:
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return false;
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}
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}
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static void pressed_keysyms_update(xkb_keysym_t *pressed_keysyms,
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const xkb_keysym_t *keysyms, size_t keysyms_len,
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enum wlr_key_state state) {
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for (size_t i = 0; i < keysyms_len; ++i) {
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if (keysym_is_modifier(keysyms[i])) {
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continue;
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}
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if (state == WLR_KEY_PRESSED) {
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pressed_keysyms_add(pressed_keysyms, keysyms[i]);
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} else { // WLR_KEY_RELEASED
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pressed_keysyms_remove(pressed_keysyms, keysyms[i]);
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}
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}
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}
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static void keyboard_binding_execute(struct roots_keyboard *keyboard,
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const char *command) {
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execute_binding_command(keyboard->seat, keyboard->input, command);
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}
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/**
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* Execute a built-in, hardcoded compositor binding. These are triggered from a
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* single keysym.
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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_execute_compositor_binding(struct roots_keyboard *keyboard,
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xkb_keysym_t keysym) {
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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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struct wlr_session *session = wlr_backend_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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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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roots_seat_end_compositor_grab(keyboard->seat);
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}
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return false;
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}
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/**
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* Execute keyboard bindings. These include compositor bindings and user-defined
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* bindings.
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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_execute_binding(struct roots_keyboard *keyboard,
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xkb_keysym_t *pressed_keysyms, uint32_t modifiers,
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const xkb_keysym_t *keysyms, size_t keysyms_len) {
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for (size_t i = 0; i < keysyms_len; ++i) {
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if (keyboard_execute_compositor_binding(keyboard, keysyms[i])) {
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return true;
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}
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}
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// User-defined bindings
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size_t n = pressed_keysyms_length(pressed_keysyms);
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struct wl_list *bindings = &keyboard->input->server->config->bindings;
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struct roots_binding_config *bc;
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wl_list_for_each(bc, bindings, link) {
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if (modifiers ^ bc->modifiers || n != bc->keysyms_len) {
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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 = pressed_keysyms_index(pressed_keysyms, 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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/*
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* Get keysyms and modifiers 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, pressing Alt+Shift+2 will trigger Alt+@.
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*/
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static size_t keyboard_keysyms_translated(struct roots_keyboard *keyboard,
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xkb_keycode_t keycode, const xkb_keysym_t **keysyms,
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uint32_t *modifiers) {
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*modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
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xkb_mod_mask_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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return xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,
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keycode, keysyms);
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}
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/*
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* Get keysyms and modifiers from the keyboard as if modifiers didn't change
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* 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.
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*
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* This will trigger keybinds such as Alt+Shift+2.
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*/
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static size_t keyboard_keysyms_raw(struct roots_keyboard *keyboard,
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xkb_keycode_t keycode, const xkb_keysym_t **keysyms,
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uint32_t *modifiers) {
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*modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
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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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return xkb_keymap_key_get_syms_by_level(keyboard->device->keyboard->keymap,
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keycode, layout_index, 0, keysyms);
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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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xkb_keycode_t keycode = event->keycode + 8;
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bool handled = false;
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uint32_t modifiers;
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const xkb_keysym_t *keysyms;
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size_t keysyms_len;
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// Handle translated keysyms
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keysyms_len = keyboard_keysyms_translated(keyboard, keycode, &keysyms,
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&modifiers);
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pressed_keysyms_update(keyboard->pressed_keysyms_translated, keysyms,
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keysyms_len, event->state);
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if (event->state == WLR_KEY_PRESSED) {
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handled = keyboard_execute_binding(keyboard,
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keyboard->pressed_keysyms_translated, modifiers, keysyms,
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keysyms_len);
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}
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// Handle raw keysyms
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keysyms_len = keyboard_keysyms_raw(keyboard, keycode, &keysyms, &modifiers);
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pressed_keysyms_update(keyboard->pressed_keysyms_raw, keysyms, keysyms_len,
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event->state);
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if (event->state == WLR_KEY_PRESSED && !handled) {
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handled = keyboard_execute_binding(keyboard,
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keyboard->pressed_keysyms_raw, modifiers, keysyms, keysyms_len);
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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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&r_keyboard->device->keyboard->modifiers);
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}
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static void keyboard_config_merge(struct roots_keyboard_config *config,
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struct roots_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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if (config->repeat_rate <= 0) {
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config->repeat_rate = fallback->repeat_rate;
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}
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if (config->repeat_delay <= 0) {
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config->repeat_delay = fallback->repeat_delay;
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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 roots_keyboard_config *config =
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calloc(1, sizeof(struct roots_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, roots_config_get_keyboard(input->config, device));
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keyboard_config_merge(config, roots_config_get_keyboard(input->config, NULL));
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struct roots_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 = { 0 };
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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(WLR_ERROR, "Cannot create XKB context");
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return NULL;
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}
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struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules,
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XKB_KEYMAP_COMPILE_NO_FLAGS);
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if (keymap == NULL) {
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xkb_context_unref(context);
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wlr_log(WLR_ERROR, "Cannot create XKB keymap");
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return NULL;
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}
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wlr_keyboard_set_keymap(device->keyboard, keymap);
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xkb_keymap_unref(keymap);
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xkb_context_unref(context);
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int repeat_rate = (config->repeat_rate > 0) ? config->repeat_rate : 25;
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int repeat_delay = (config->repeat_delay > 0) ? config->repeat_delay : 600;
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wlr_keyboard_set_repeat_info(device->keyboard, repeat_rate, repeat_delay);
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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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