foot/ime.c

#include "ime.h"

#include <string.h>

#include "text-input-unstable-v3.h"

#define LOG_MODULE "ime"
#define LOG_ENABLE_DBG 1
#include "log.h"
#include "terminal.h"
#include "wayland.h"
#include "xmalloc.h"

static void
enter(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
      struct wl_surface *surface)
{
    struct seat *seat = data;
    LOG_DBG("enter: seat=%s", seat->name);

    assert(seat->kbd_focus != NULL);

    switch (term_surface_kind(seat->kbd_focus, surface)) {
    case TERM_SURF_GRID:
        zwp_text_input_v3_enable(seat->wl_text_input);
        zwp_text_input_v3_set_content_type(
            seat->wl_text_input,
            ZWP_TEXT_INPUT_V3_CONTENT_HINT_NONE,
            ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_TERMINAL);

        /* TODO: set cursor rectangle */
        zwp_text_input_v3_set_cursor_rectangle(seat->wl_text_input, 0, 0, 15, 15);
        break;

    case TERM_SURF_SEARCH:
        /* TODO */
        /* FALLTHROUGH */

    case TERM_SURF_NONE:
    case TERM_SURF_SCROLLBACK_INDICATOR:
    case TERM_SURF_RENDER_TIMER:
    case TERM_SURF_TITLE:
    case TERM_SURF_BORDER_LEFT:
    case TERM_SURF_BORDER_RIGHT:
    case TERM_SURF_BORDER_TOP:
    case TERM_SURF_BORDER_BOTTOM:
    case TERM_SURF_BUTTON_MINIMIZE:
    case TERM_SURF_BUTTON_MAXIMIZE:
    case TERM_SURF_BUTTON_CLOSE:
        zwp_text_input_v3_disable(seat->wl_text_input);
        break;
    }

    zwp_text_input_v3_commit(seat->wl_text_input);
    seat->ime.serial++;
}

static void
leave(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
      struct wl_surface *surface)
{
    struct seat *seat = data;
    LOG_DBG("leave: seat=%s", seat->name);
    zwp_text_input_v3_disable(seat->wl_text_input);
    zwp_text_input_v3_commit(seat->wl_text_input);
    seat->ime.serial++;
}

static void
preedit_string(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
               const char *text, int32_t cursor_begin, int32_t cursor_end)
{
    LOG_DBG("preedit-string: text=%s, begin=%d, end=%d", text, cursor_begin, cursor_end);
    struct seat *seat = data;

    free(seat->ime.preedit.text);
    seat->ime.preedit.text = text != NULL ? xstrdup(text) : NULL;
    seat->ime.preedit.cursor_begin = cursor_begin;
    seat->ime.preedit.cursor_end = cursor_end;
}

static void
commit_string(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
              const char *text)
{
    LOG_DBG("commit: text=%s", text);
    struct seat *seat = data;
    free(seat->ime.commit.text);
    seat->ime.commit.text = text != NULL ? xstrdup(text) : NULL;
    //term_to_slave(seat->kbd_focus, text, strlen(text));
}

static void
delete_surrounding_text(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
                        uint32_t before_length, uint32_t after_length)
{
    LOG_DBG("delete-surrounding: before=%d, after=%d", before_length, after_length);
    struct seat *seat = data;
    seat->ime.surrounding.before_length = before_length;
    seat->ime.surrounding.after_length = after_length;
}

static void
done(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
     uint32_t serial)
{
    /*
     * The application must proceed by evaluating the changes in the
     * following order:
     *
     * 1. Replace existing preedit string with the cursor. 2. Delete
     * requested surrounding text. 3. Insert commit string with the
     * cursor at its end. 4. Calculate surrounding text to send. 5.
     * Insert new preedit text in cursor position. 6. Place cursor
     * inside preedit text.
     */

    LOG_DBG("done: serial=%u", serial);
    struct seat *seat = data;

    if (seat->ime.serial != serial)
        LOG_WARN("IME serial mismatch: expected=0x%08x, got 0x%08x",
                 seat->ime.serial, serial);

    assert(seat->kbd_focus);

    if (seat->ime.commit.text != NULL)
        term_to_slave(seat->kbd_focus, seat->ime.commit.text, strlen(seat->ime.commit.text));

    free(seat->ime.commit.text);
    seat->ime.commit.text = NULL;
}

const struct zwp_text_input_v3_listener text_input_listener = {
    .enter = &enter,
    .leave = &leave,
    .preedit_string = &preedit_string,
    .commit_string = &commit_string,
    .delete_surrounding_text = &delete_surrounding_text,
    .done = &done,
};