From f620fa7adecebd8c45a92b644158be8dec40450b Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Mon, 9 Apr 2012 21:31:45 +0000
Subject: [PATCH] xenv: allow to specify event filter

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@949 be3aeb3a-fb24-0410-a615-afba39da0efa
---
 linux/xenv.c | 30 +++++++++++++++++-------------
 linux/xenv.h |  7 ++++++-
 2 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/linux/xenv.c b/linux/xenv.c
index a932a1e..40bf92c 100644
--- a/linux/xenv.c
+++ b/linux/xenv.c
@@ -25,6 +25,8 @@
 #include <termios.h>
 #include <linux/kd.h>
 
+#include "xenv.h"
+
 #define PFX "xenv: "
 
 #define FPTR(f) typeof(f) * p##f
@@ -81,13 +83,14 @@ static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win
 	return cursor;
 }
 
-static int x11h_init(const char *window_title)
+static int x11h_init(int *xenv_flags, const char *window_title)
 {
 	unsigned int display_width, display_height;
 	Display *display;
 	XSetWindowAttributes attributes;
 	Window win;
 	Visual *visual;
+	long evt_mask;
 	void *x11lib;
 	int screen;
 
@@ -153,10 +156,14 @@ static int x11h_init(const char *window_title)
 	attributes.cursor = transparent_cursor(&g_xstuff, display, win);
 	g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes);
 
-	g_xstuff.pXStoreName(display, win, window_title);
-	g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask
-		| KeyPressMask | KeyReleaseMask | ButtonPressMask
-		| ButtonReleaseMask | PointerMotionMask | PropertyChangeMask);
+	if (window_title != NULL)
+		g_xstuff.pXStoreName(display, win, window_title);
+	evt_mask = ExposureMask | FocusChangeMask | PropertyChangeMask;
+	if (xenv_flags && (*xenv_flags & XENV_CAP_KEYS))
+		evt_mask |= KeyPressMask | KeyReleaseMask;
+	if (xenv_flags && (*xenv_flags & XENV_CAP_MOUSE))
+		evt_mask |= ButtonPressMask | ButtonReleaseMask | PointerMotionMask;
+	g_xstuff.pXSelectInput(display, win, evt_mask);
 	g_xstuff.pXMapWindow(display, win);
 	g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 	g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
@@ -368,17 +375,16 @@ static void tty_end(void)
 	g_kbdfd = -1;
 }
 
-int xenv_init(int *have_mouse_events, const char *window_title)
+int xenv_init(int *xenv_flags, const char *window_title)
 {
-	int have_mouse = 0;
 	int ret;
 
-	ret = x11h_init(window_title);
-	if (ret == 0) {
-		have_mouse = 1;
+	ret = x11h_init(xenv_flags, window_title);
+	if (ret == 0)
 		goto out;
-	}
 
+	if (xenv_flags != NULL)
+		*xenv_flags &= ~(XENV_CAP_KEYS | XENV_CAP_MOUSE); /* TODO? */
 	ret = tty_init();
 	if (ret == 0)
 		goto out;
@@ -386,8 +392,6 @@ int xenv_init(int *have_mouse_events, const char *window_title)
 	fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n");
 	ret = -1;
 out:
-	if (have_mouse_events != NULL)
-		*have_mouse_events = have_mouse;
 	return ret;
 }
 
diff --git a/linux/xenv.h b/linux/xenv.h
index cd1bc70..005ec0a 100644
--- a/linux/xenv.h
+++ b/linux/xenv.h
@@ -1,5 +1,10 @@
 
-int  xenv_init(int *have_mouse_events, const char *window_title);
+#define XENV_CAP_KEYS	(1<<0)
+#define XENV_CAP_MOUSE	(1<<1)
+
+/* xenv_flags specify if we need keys and mouse,
+ * flag is removed if input is not available */
+int  xenv_init(int *xenv_flags, const char *window_title);
 
 /* read events from X, calling key_cb for key, mouseb_cb for mouse button
  * and mousem_cb for mouse motion events */
-- 
2.39.2