From d09b60fdff0670bcac40d50f0a8b2a3c15ef066e Mon Sep 17 00:00:00 2001
From: Matthias Kruk <m@m10k.eu>
Date: Sun, 2 May 2021 09:53:37 +0900
Subject: [PATCH] mwm: Add datatype to manage global context

This commit adds the mwm data type, which stores the global state of
the window manager, and will be used to handle events.
---
 mwm.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 mwm.h |  16 +++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 mwm.c
 create mode 100644 mwm.h

diff --git a/mwm.c b/mwm.c
new file mode 100644
index 0000000..df16faf
--- /dev/null
+++ b/mwm.c
@@ -0,0 +1,103 @@
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <X11/Xlib.h>
+#include "mwm.h"
+#include "monitor.h"
+#include "array.h"
+
+struct mwm {
+	Display *display;
+
+	struct array *monitors;
+};
+
+int mwm_new(struct mwm **dst)
+{
+	struct mwm *mwm;
+
+	if(!dst) {
+		return(-EINVAL);
+	}
+
+	mwm = malloc(sizeof(*mwm));
+
+	if(!mwm) {
+		return(-ENOMEM);
+	}
+
+	memset(mwm, 0, sizeof(*mwm));
+
+	if(array_new(&(mwm->monitors)) < 0) {
+		free(mwm);
+		return(-ENOMEM);
+	}
+
+	*dst = mwm;
+
+	return(0);
+}
+
+int mwm_free(struct mwm **mwm)
+{
+	if(!mwm) {
+		return(-EINVAL);
+	}
+
+	if(!*mwm) {
+		return(-EALREADY);
+	}
+
+	free(*mwm);
+	*mwm = NULL;
+
+	return(0);
+}
+
+int mwm_init(struct mwm *mwm)
+{
+	return(-ENOSYS);
+}
+
+int mwm_run(struct mwm *mwm)
+{
+	return(-ENOSYS);
+}
+
+int mwm_attach_monitor(struct mwm *mwm, struct monitor *mon)
+{
+	int idx;
+
+	if(!mwm || !mon) {
+		return(-EINVAL);
+	}
+
+	idx = monitor_get_id(mon);
+
+	if(array_set(mwm->monitors, idx, mon) < 0) {
+		return(-ENOMEM);
+	}
+
+	/* register monitor */
+
+	return(0);
+}
+
+int mwm_detach_monitor(struct mwm *mwm, struct monitor *mon)
+{
+	int idx;
+
+	if(!mwm || !mon) {
+		return(-EINVAL);
+	}
+
+	idx = monitor_get_id(mon);
+
+	if(array_take(mwm->monitors, idx, NULL) < 0) {
+		return(-ENODEV);
+	}
+
+	/* unregister monitor */
+
+	return(0);
+}
diff --git a/mwm.h b/mwm.h
new file mode 100644
index 0000000..645ec08
--- /dev/null
+++ b/mwm.h
@@ -0,0 +1,16 @@
+#ifndef MWM_H
+#define MWM_H 1
+
+struct mwm;
+struct monitor;
+
+int mwm_new(struct mwm **mwm);
+int mwm_free(struct mwm **mwm);
+
+int mwm_init(struct mwm *mwm);
+int mwm_run(struct mwm *mwm);
+
+int mwm_attach_monitor(struct mwm *mwm, struct monitor *mon);
+int mwm_detach_monitor(struct mwm *mwm, struct monitor *mon);
+
+#endif /* MWM_H */
-- 
2.47.3