#pragma once

#include <cairo.h>

#include "color.h"
#include "decoration.h"
#include "font.h"
#include "tag.h"

struct bar;
struct exposable;

struct particle {
    void *private;

    int left_margin, right_margin;
    struct deco *deco;
    char *on_click_template;

    void (*destroy)(struct particle *particle);
    struct exposable *(*instantiate)(const struct particle *particle,
                                     const struct tag_set *tags);
};

enum mouse_event {
    ON_MOUSE_MOTION,
    ON_MOUSE_CLICK,
};

struct exposable {
    const struct particle *particle;
    void *private;

    int width; /* Should be set by begin_expose(), at latest */
    char *on_click;

    void (*destroy)(struct exposable *exposable);
    int (*begin_expose)(struct exposable *exposable, cairo_t *cr);
    void (*expose)(const struct exposable *exposable, cairo_t *cr,
                   int x, int y, int height);

    void (*on_mouse)(struct exposable *exposable, struct bar *bar,
                     enum mouse_event event, int x, int y);
};

struct particle *particle_common_new(int left_margin, int right_margin,
                                     const char *on_click_template);
void particle_default_destroy(struct particle *particle);

struct exposable *exposable_common_new(
    const struct particle *particle, const char *on_click);
void exposable_default_destroy(struct exposable *exposable);
void exposable_default_on_mouse(
    struct exposable *exposable, struct bar *bar,
    enum mouse_event event, int x, int y);