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/*
* wl_text_input.c
* Copyright (C) 2021 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
#include "wl_text_input.h"
#include "internal.h"
#include "wayland-text-input-unstable-v3-client-protocol.h"
#include <stdlib.h>
#include <string.h>
#define debug debug_input
static struct zwp_text_input_v3* text_input;
static struct zwp_text_input_manager_v3* text_input_manager;
static char *pending_pre_edit = NULL;
static char *current_pre_edit = NULL;
static char *pending_commit = NULL;
static bool ime_focused = false;
static int last_cursor_left = 0, last_cursor_top = 0, last_cursor_width = 0, last_cursor_height = 0;
uint32_t commit_serial = 0;
static void commit(void) {
if (text_input) {
zwp_text_input_v3_commit (text_input);
commit_serial++;
}
}
static void
text_input_enter(void *data UNUSED, struct zwp_text_input_v3 *txt_input, struct wl_surface *surface UNUSED) {
debug("text-input: enter event\n");
if (txt_input) {
ime_focused = true;
zwp_text_input_v3_enable(txt_input);
zwp_text_input_v3_set_content_type(txt_input, ZWP_TEXT_INPUT_V3_CONTENT_HINT_NONE, ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_TERMINAL);
commit();
}
}
static void
text_input_leave(void *data UNUSED, struct zwp_text_input_v3 *txt_input, struct wl_surface *surface UNUSED) {
debug("text-input: leave event\n");
if (txt_input) {
ime_focused = false;
zwp_text_input_v3_disable(txt_input);
commit();
}
}
static void
send_text(const char *text, GLFWIMEState ime_state) {
_GLFWwindow *w = _glfwFocusedWindow();
if (w && w->callbacks.keyboard) {
GLFWkeyevent fake_ev = {.action = text ? GLFW_PRESS : GLFW_RELEASE};
fake_ev.text = text;
fake_ev.ime_state = ime_state;
w->callbacks.keyboard((GLFWwindow*) w, &fake_ev);
}
}
static void
text_input_preedit_string(
void *data UNUSED,
struct zwp_text_input_v3 *txt_input UNUSED,
const char *text,
int32_t cursor_begin,
int32_t cursor_end
) {
debug("text-input: preedit_string event: text: %s cursor_begin: %d cursor_end: %d\n", text, cursor_begin, cursor_end);
free(pending_pre_edit);
pending_pre_edit = text ? _glfw_strdup(text) : NULL;
}
static void
text_input_commit_string(void *data UNUSED, struct zwp_text_input_v3 *txt_input UNUSED, const char *text) {
debug("text-input: commit_string event: text: %s\n", text);
free(pending_commit);
pending_commit = text ? _glfw_strdup(text) : NULL;
}
static void
text_input_delete_surrounding_text(
void *data UNUSED,
struct zwp_text_input_v3 *txt_input UNUSED,
uint32_t before_length,
uint32_t after_length) {
debug("text-input: delete_surrounding_text event: before_length: %u after_length: %u\n", before_length, after_length);
}
static void
text_input_done(void *data UNUSED, struct zwp_text_input_v3 *txt_input UNUSED, uint32_t serial) {
debug("text-input: done event: serial: %u current_commit_serial: %u\n", serial, commit_serial);
const bool bad_event = serial != commit_serial;
// See https://wayland.app/protocols/text-input-unstable-v3#zwp_text_input_v3:event:done
// for handling of bad events. As best as I can tell spec says we perform all client side actions as usual
// but send nothing back to the compositor, aka no cursor position update.
// See https://github.com/kovidgoyal/kitty/pull/7283 for discussion
if ((pending_pre_edit == NULL && current_pre_edit == NULL) ||
(pending_pre_edit && current_pre_edit && strcmp(pending_pre_edit, current_pre_edit) == 0)) {
free(pending_pre_edit); pending_pre_edit = NULL;
} else {
free(current_pre_edit);
current_pre_edit = pending_pre_edit;
pending_pre_edit = NULL;
if (current_pre_edit) {
send_text(current_pre_edit, bad_event ? GLFW_IME_WAYLAND_DONE_EVENT : GLFW_IME_PREEDIT_CHANGED);
} else {
// Clear pre-edit text
send_text(NULL, GLFW_IME_WAYLAND_DONE_EVENT);
}
}
if (pending_commit) {
send_text(pending_commit, GLFW_IME_COMMIT_TEXT);
free(pending_commit); pending_commit = NULL;
}
}
void
_glfwWaylandBindTextInput(struct wl_registry* registry, uint32_t name) {
if (!text_input_manager && _glfw.hints.init.wl.ime) text_input_manager = wl_registry_bind(registry, name, &zwp_text_input_manager_v3_interface, 1);
}
void
_glfwWaylandInitTextInput(void) {
static const struct zwp_text_input_v3_listener text_input_listener = {
.enter = text_input_enter,
.leave = text_input_leave,
.preedit_string = text_input_preedit_string,
.commit_string = text_input_commit_string,
.delete_surrounding_text = text_input_delete_surrounding_text,
.done = text_input_done,
};
if (_glfw.hints.init.wl.ime && !text_input && text_input_manager && _glfw.wl.seat) {
text_input = zwp_text_input_manager_v3_get_text_input(text_input_manager, _glfw.wl.seat);
if (text_input) zwp_text_input_v3_add_listener(text_input, &text_input_listener, NULL);
}
}
void
_glfwWaylandDestroyTextInput(void) {
if (text_input) zwp_text_input_v3_destroy(text_input);
if (text_input_manager) zwp_text_input_manager_v3_destroy(text_input_manager);
text_input = NULL; text_input_manager = NULL;
free(pending_pre_edit); pending_pre_edit = NULL;
free(current_pre_edit); current_pre_edit = NULL;
free(pending_commit); pending_commit = NULL;
}
void
_glfwPlatformUpdateIMEState(_GLFWwindow *w, const GLFWIMEUpdateEvent *ev) {
if (!text_input) return;
switch(ev->type) {
case GLFW_IME_UPDATE_FOCUS:
debug("\ntext-input: updating IME focus state, ime_focused: %d ev->focused: %d\n", ime_focused, ev->focused);
if (ime_focused) {
zwp_text_input_v3_enable(text_input);
zwp_text_input_v3_set_content_type(text_input, ZWP_TEXT_INPUT_V3_CONTENT_HINT_NONE, ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_TERMINAL);
} else {
free(pending_pre_edit); pending_pre_edit = NULL;
if (current_pre_edit) {
// Clear pre-edit text
send_text(NULL, GLFW_IME_PREEDIT_CHANGED);
free(current_pre_edit); current_pre_edit = NULL;
}
if (pending_commit) {
free(pending_commit); pending_commit = NULL;
}
zwp_text_input_v3_disable(text_input);
}
commit();
break;
case GLFW_IME_UPDATE_CURSOR_POSITION: {
const double scale = _glfwWaylandWindowScale(w);
#define s(x) (int)round((x) / scale)
const int left = s(ev->cursor.left), top = s(ev->cursor.top), width = s(ev->cursor.width), height = s(ev->cursor.height);
#undef s
if (left != last_cursor_left || top != last_cursor_top || width != last_cursor_width || height != last_cursor_height) {
last_cursor_left = left;
last_cursor_top = top;
last_cursor_width = width;
last_cursor_height = height;
debug("\ntext-input: updating cursor position: left=%d top=%d width=%d height=%d\n", left, top, width, height);
zwp_text_input_v3_set_cursor_rectangle(text_input, left, top, width, height);
commit();
}
}
break;
}
}
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