From 126ed568fd60b518af16d0d63fa8980835dce0a3 Mon Sep 17 00:00:00 2001
From: Eamon Walsh <ewalsh@tycho.nsa.gov>
Date: Fri, 29 Jul 2011 20:37:39 -0400
Subject: Add display switching to the local socket debugging interface.

Allows programmatic switching of the display to a specific domain,
server screen, or combined desktop screen.
---
 src/debug.c   |  3 ++-
 src/display.c |  4 ++--
 src/display.h |  7 ++++++-
 src/local.c   | 26 ++++++++++++++++++++++++++
 src/local.h   |  1 +
 5 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/src/debug.c b/src/debug.c
index 86889d5..2781d85 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -39,7 +39,8 @@ usage(void)
 {
 	bail("Usage: linpicker-cli <code> [param...]\n\t"
 	     "0 - Dump views\n\t"
-	     "1 <domid> <sak> - Register SAK");
+	     "1 <domid> <sak> - Register SAK\n\t"
+	     "2 <domid|-1|-2> - Switch displays");
 }
 
 int
diff --git a/src/display.c b/src/display.c
index 7ae89f2..511430e 100644
--- a/src/display.c
+++ b/src/display.c
@@ -57,8 +57,8 @@
 #include "sak.h"
 #include "sclient.h"
 
-static struct display *desktop_display; /* display for the combined desktop */
 struct display *server_display; /* display for the server itself */
+struct display *desktop_display; /* display for the combined desktop */
 struct display *active_display; /* currently active display */
 
 static struct view_list thumbs; /* global list of thumbnails */
@@ -507,7 +507,7 @@ display_buffer_remove(struct buffer *b)
     free(d);
 }
 
-int
+static int
 init_graphics(int *argc, char ***argv)
 {
     DFBDisplayLayerConfig dl_config;
diff --git a/src/display.h b/src/display.h
index f48b619..4574ba7 100644
--- a/src/display.h
+++ b/src/display.h
@@ -65,8 +65,10 @@ struct display {
 
 CIRCLEQ_HEAD(display_cirq, display);
 
-extern struct display *active_display;
 extern struct display *server_display;
+extern struct display *desktop_display;
+extern struct display *active_display;
+
 extern IDirectFB *dfb;
 extern IDirectFBDisplayLayer *dl;
 
@@ -82,6 +84,9 @@ display_secure_enter(int keycode);
 void
 display_secure_leave(void);
 
+void
+display_switch(struct display *d);
+
 void
 display_update_mouselabel(struct display *d, struct client *client);
 
diff --git a/src/local.c b/src/local.c
index 36f1bbe..c3b24f0 100644
--- a/src/local.c
+++ b/src/local.c
@@ -57,6 +57,29 @@ local_set_sak(struct local_message *msg)
 		sak_register(msg->param2, b->bg_view->display);
 }
 
+static void
+local_switch(struct local_message *msg)
+{
+	struct buffer *b;
+	struct display *d;
+
+	switch (msg->param1) {
+	case -1:
+		d = server_display;
+		break;
+	case -2:
+		d = desktop_display;
+		break;
+	default:
+		b = buffer_lookup(msg->param1, 0);
+		d = b ? b->bg_view->display : server_display;
+		break;
+	}
+
+	display_switch(d);
+	display_update_seclabel(d);
+}
+
 static void
 local_process(void *closure)
 {
@@ -79,6 +102,9 @@ local_process(void *closure)
 		case LINPICKER_LOCAL_SET_SAK:
 			local_set_sak(&msg);
 			break;
+		case LINPICKER_LOCAL_SWITCH:
+			local_switch(&msg);
+			break;
 		default:
 			break;
 		}
diff --git a/src/local.h b/src/local.h
index 1e6c5eb..dfcce59 100644
--- a/src/local.h
+++ b/src/local.h
@@ -21,6 +21,7 @@
 /* Messages accepted over the socket */
 #define LINPICKER_LOCAL_DUMP_VIEWS 0
 #define LINPICKER_LOCAL_SET_SAK    1
+#define LINPICKER_LOCAL_SWITCH     2
 
 struct local_message {
     uint32_t type;
-- 
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