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#include "internal.h"
#include "screen.h"

_Thread_local char term_thread_anchor;

const char *term_unicode_version(void)
{
    return UNICODE_DATA_VERSION;
}

void term_lock(struct term *t)
{
    term_write_begin(t);
}

void term_unlock(struct term *t)
{
    term_write_end(t);
}

struct term_vector2i term_size(const struct term *t)
{
    if (!t)
        return (struct term_vector2i){ 0 };
    term_write_begin((struct term *)t);
    struct term_vector2i size = { .x = t->cols, .y = t->rows };
    term_write_end((struct term *)t);
    return size;
}

struct term_modes term_modes(const struct term *t)
{
    if (!t)
        return (struct term_modes){ 0 };
    term_write_begin((struct term *)t);
    struct term_modes m = {
        .keyboard = t->keyboard[t->alternate].flags,
        .mouse = (enum term_mouse)t->mouse_mode,
        .mouse_encoding = (enum term_mouse_encoding)t->mouse_encoding,
        .grid = { .x = t->cols, .y = t->rows },
        .app_cursor = t->application_cursor,
        .app_keypad = t->application_keypad,
        .backarrow_bs = t->backarrow_sends_bs,
        .bracketed_paste = t->bracketed_paste,
        .focus_events = t->focus_events,
        .alternate = t->alternate,
        .reverse_video = t->reverse_video,
        .synchronized = t->synchronized_output,
    };
    term_write_end((struct term *)t);
    return m;
}

struct term_cursor term_cursor(const struct term *t)
{
    if (!t)
        return (struct term_cursor){ .visible = true };
    term_write_begin((struct term *)t);
    struct term_cursor c = {
        .pos = { .x = t->cursor_x, .y = t->cursor_y },
        .style = t->cursor_style,
        .visible = t->cursor_visible,
        .blink = t->cursor_blink,
    };
    term_write_end((struct term *)t);
    return c;
}

void term_set_cursor_default(struct term *t, enum term_cursor_style style, bool steady)
{
    if (!t)
        return;
    term_write_begin(t);
    if (style > TERM_CURSOR_BAR)
        style = TERM_CURSOR_BLOCK;
    if (t->cursor_style != style || t->cursor_blink == steady) {
        struct srow *cur = term_row(t, t->cursor_y);
        if (cur) cur->version++;
    }
    t->default_cursor_style = t->cursor_style = style;
    t->default_cursor_blink = t->cursor_blink = !steady;
    term_write_end(t);
}

void term_set_theme(struct term *t, const struct term_theme *theme)
{
    if (!t)
        return;
    term_write_begin(t);
    struct palette next = { .version = t->palette.version };
    term_palette_init(&next, theme);
    if (memcmp(&next.theme, &t->palette.theme, sizeof(next.theme)))
        t->palette = next;
    term_write_end(t);
}

void term_focus(struct term *t, bool focused)
{
    if (!t)
        return;
    term_write_begin(t);
    if (t->focus_events)
        send_response(t, focused ? "\033[I" : "\033[O");
    term_write_end(t);
}

size_t term_cwd(const struct term *t, char *buf, size_t cap)
{
    if (!t)
        return term_copy_out(NULL, buf, cap);
    term_write_begin((struct term *)t);
    size_t n = term_copy_out(t->cwd, buf, cap);
    term_write_end((struct term *)t);
    return n;
}

size_t term_pointer_shape(const struct term *t, char *buf, size_t cap)
{
    if (!t)
        return term_copy_out(NULL, buf, cap);
    term_write_begin((struct term *)t);
    size_t n = term_copy_out(t->pointer_shape, buf, cap);
    term_write_end((struct term *)t);
    return n;
}