[PATCH 16/18] Add synxrrd daemon

[Takashi Iwai]

This is a daemon program to sync Xrandr rotation with the synaptics device.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 tools/Makefile.am |    5 +-
 tools/synxrrd.c   |  186 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 190 insertions(+), 1 deletions(-)
 create mode 100644 tools/synxrrd.c

diff --git a/tools/Makefile.am b/tools/Makefile.am
index 2ad48f6..1111576 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -18,7 +18,7 @@
 #  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 #  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-bin_PROGRAMS = synclient syndaemon
+bin_PROGRAMS = synclient syndaemon synxrrd
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(sdkdir)
 AM_CFLAGS = $(XI_CFLAGS)
@@ -30,3 +30,6 @@ syndaemon_SOURCES = syndaemon.c
 syndaemon_CFLAGS = $(AM_CFLAGS) $(XTST_CFLAGS)
 syndaemon_LDFLAGS = $(AM_LDFLAGS) $(XTST_LIBS)
 
+synxrrd_SOURCES = synxrrd.c
+synxrrd_LDFLAGS = -lXrandr $(XLIB_LIBS) $(XI_LIBS)
+
diff --git a/tools/synxrrd.c b/tools/synxrrd.c
new file mode 100644
index 0000000..9f00e5b
--- /dev/null
+++ b/tools/synxrrd.c
@@ -0,0 +1,186 @@
+/*
+ * synxrrd.c
+ * Copyright (C) 2010 Takashi Iwai <tiwai at suse.de>
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xrandr.h>
+
+#define progname	"synxrrd"
+
+static int verbose;
+static const char *laptop_name;
+
+static int is_laptop(const char *name)
+{
+	if (laptop_name) {
+		if (!strcmp(name, laptop_name))
+			return 1;
+	} else {
+		if (strstr(name, "LVDS") ||
+		    strstr(name, "Lvds") ||
+		    strstr(name, "LVDs"))
+			return 1;
+		if (strstr(name, "LCD"))
+			return 1;
+	}
+	return 0;
+}
+
+static int current_rotation = -1; /* unknown */
+
+static int (*xerror_saved)(Display *, XErrorEvent *);
+static int xerror_code;
+
+static int xerror_ignore(Display *dpy, XErrorEvent *err)
+{
+	xerror_code = err->error_code;
+	return 0;
+}
+
+extern int (*_XErrorFunction)(Display *, XErrorEvent *);
+extern int _XDefaultError(Display *dpy, XErrorEvent *event);
+
+static void xerror_save(void)
+{
+	xerror_code = 0;
+	xerror_saved = _XErrorFunction;
+	_XErrorFunction = xerror_ignore;
+}
+
+static int xerror_restore(void)
+{
+	_XErrorFunction = xerror_saved;
+	return xerror_code;
+}
+
+static void notify_synaptics(XRRCrtcInfo *cres)
+{
+	int rotation;
+	char buf[256];
+
+	if (cres->rotation & 8)
+		rotation = 3;
+	else if (cres->rotation & 4)
+		rotation = 2;
+	else if (cres->rotation & 2)
+		rotation = 1;
+	else
+		rotation = 0;
+	if (current_rotation == rotation)
+		return;
+	current_rotation = rotation;
+	if (verbose)
+		fprintf(stderr, "%s: notified rotation %d\n",
+			progname, current_rotation);
+	sprintf(buf, "synclient Orientation=%d", current_rotation);
+	system(buf);
+}
+
+static void update_screen(Display *dpy, Window root)
+{
+	XRRScreenResources *res;
+	int i;
+
+	res = XRRGetScreenResources(dpy, root);
+	if (!res)
+		return;
+	for (i = 0; i < res->noutput; i++) {
+		XRROutputInfo *info;
+
+	       	info = XRRGetOutputInfo(dpy, res, res->outputs[i]);
+		if (!info)
+			continue;
+		if (is_laptop(info->name)) {
+			RRCrtc crtc = info->crtc;
+			XRRCrtcInfo *cres;
+
+			XRRFreeOutputInfo(info);
+			cres = XRRGetCrtcInfo(dpy, res, crtc);
+			if (!cres)
+				continue;
+			notify_synaptics(cres);
+			XRRFreeCrtcInfo(cres);
+			break;
+		}
+		XRRFreeOutputInfo(info);
+	}
+	XRRFreeScreenResources(res);
+}
+
+static void synxrr_daemon(Display *dpy, Window root)
+{
+	int event_base, error_base;
+
+	XRRQueryExtension(dpy, &event_base, &error_base);
+
+	XRRSelectInput(dpy, root, RRScreenChangeNotifyMask);
+
+	for (;;) {
+		XEvent event;
+
+		XNextEvent(dpy, &event);
+		xerror_save();
+		XRRUpdateConfiguration(&event);
+		switch (event.type - event_base) {
+		case RRScreenChangeNotify:
+			update_screen(dpy, root);
+			break;
+		}
+		xerror_restore();
+	}
+}
+
+static void usage(void)
+{
+	fprintf(stderr, "usage: %s [options]\n", progname);
+	fprintf(stderr, "  options\n");
+	fprintf(stderr, "  -d display  set X display name\n");
+	fprintf(stderr, "  -l name     xrandr output name for laptop display\n");
+	fprintf(stderr, "  -v          verbose mode\n");
+}
+
+int main(int argc, char **argv)
+{
+	Display *dpy;
+	Window root;
+	const char *display_name = NULL;
+	const char *device_name;
+	int c;
+
+	while ((c = getopt(argc, argv, "d:l:v")) != -1) {
+		switch (c) {
+		case 'd':
+			display_name = optarg;
+			break;
+		case 'l':
+			laptop_name = optarg;
+			break;
+		case 'v':
+			verbose++;
+			break;
+		default:
+			usage();
+			return 1;
+		}
+	}
+
+	device_name = argv[optind];
+
+	dpy = XOpenDisplay(display_name);
+	if (!dpy) {
+		perror("open display");
+		return 1;
+	}
+
+	root = DefaultRootWindow(dpy);
+	update_screen(dpy, root);
+	synxrr_daemon(dpy, root);
+
+	return 0;
+}
-- 
1.7.3.1