initial commit: wip

particle.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <cairo.h>
+#include "color.h"
+#include "font.h"
+#include "tag.h"
+
+struct exposable;
+
+struct particle {
+    struct particle *parent;
+    void *private;
+
+    int left_margin, right_margin;
+
+    void (*destroy)(struct particle *particle);
+    struct exposable *(*instantiate)(const struct particle *particle,
+                                     const struct tag_set *tags);
+};
+
+
+struct exposable {
+    const struct particle *particle;
+    void *private;
+
+    void (*destroy)(struct exposable *exposable);
+    int (*begin_expose)(const struct exposable *exposable, cairo_t *cr);
+    void (*expose)(const struct exposable *exposable, cairo_t *cr,
+                   int x, int y, int height);
+};
+
+struct particle *particle_common_new(int left_margin, int right_margin);