#include <glib.h>

#include "state.h"

State *state_create(Window *win, Drawable *draw)
{
    State *state = g_malloc(sizeof(State));
    g_assert_nonnull(state);

    state->win = win;
    state->draw = draw;
    state->btns = NULL;
    state->id = 0;

    return state;
}

void state_add_button(State *state, Button *btn)
{
    // insert sorted
    state->btns = g_list_append(state->btns, btn);
}

static gboolean redraw_and_layout(gpointer data)
{
    State *state = data;
    draw_compute_layout(state->draw, state->win, state->btns);
    draw_paint(state->draw, state->win);
    state->id = 0;
    return G_SOURCE_REMOVE;
}

static gboolean redraw(gpointer data)
{
    State *state = data;
    draw_paint(state->draw, state->win);
    state->id = 0;
    return G_SOURCE_REMOVE;
}

// Sometimes we schedule multiple redraws in a row without actually checking if there are
// others already scheduled...
// This could probably be fixed by implementing a redraw source...
void state_redraw(State *state, bool changed_layout)
{
    // XXX: Override old redraw
    if (state->id != 0)
        g_source_remove(state->id);

    state->id = g_idle_add_full(G_PRIORITY_HIGH_IDLE, changed_layout ? redraw_and_layout : redraw, state, NULL);
}

void state_destroy(State *state)
{
    g_list_free_full(state->btns, (void *)button_destroy);
    g_free(state);
}

// vim: ts=4 sw=4 et