initial commit: wip

module.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <cairo.h>
+
+#include "particle.h"
+#include "tag.h"
+
+struct bar;
+struct module;
+
+struct module_run_context {
+    struct module *module;
+    int abort_fd;
+};
+
+struct module_expose_context {
+    struct exposable *exposable;
+    int width;
+};
+
+struct module {
+    const struct bar *bar;
+
+    void *private;
+
+    int (*run)(struct module_run_context *ctx);
+    void (*destroy)(struct module *module);
+
+    struct exposable *(*content)(const struct module *mod);
+    struct module_expose_context (*begin_expose)(const struct module *mod, cairo_t *cr);
+    void (*expose)(const struct module *mod,
+                   const struct module_expose_context *ctx,
+                   cairo_t *cr, int x, int y, int height);
+    void (*end_expose)(const struct module *mod, struct module_expose_context *ctx);
+};
+
+struct module_expose_context module_default_begin_expose(
+    const struct module *mod, cairo_t *cr);
+
+void module_default_expose(
+    const struct module *mod,
+    const struct module_expose_context *ctx, cairo_t *cr,
+    int x, int y, int height);
+
+void module_default_end_expose(
+    const struct module *mod, struct module_expose_context *ctx);