From 8d7c65187ede7b6e7695c6bcb798bd5bb746295a Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 21 Jul 2025 23:03:40 +0200
Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025

---
 js/x11/core/ext/screen-saver.js | 109 ++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 js/x11/core/ext/screen-saver.js

diff --git a/js/x11/core/ext/screen-saver.js b/js/x11/core/ext/screen-saver.js
new file mode 100644
index 0000000..81a11ad
--- /dev/null
+++ b/js/x11/core/ext/screen-saver.js
@@ -0,0 +1,109 @@
+// http://www.x.org/releases/X11R7.6/doc/scrnsaverproto/saver.pdf
+
+var x11 = Require('x11/core/x11');
+// TODO: move to templates
+
+exports.requireExt = function(display, callback)
+{
+    var X = display.client;
+    X.QueryExtension('MIT-SCREEN-SAVER', function(err, ext) {
+
+        if (!ext.present)
+            return callback(new Error('extension not available'));
+
+
+        ext.QueryVersion = function(clientMaj, clientMin, cb)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSCCxx', [ext.majorOpcode, 0, 2, clientMaj, clientMin]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var res = buf.unpack('CC');
+                    return res;
+                },
+                cb
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.State = {
+            Off: 0,
+	    On: 1,
+            Disabled: 2
+        };
+
+        ext.Kind = {
+            Blanked: 0,
+	    Internal: 1,
+            External: 2
+        };
+
+        ext.QueryInfo = function(drawable, callback)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSL', [ext.majorOpcode, 1, 2, drawable]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var info = {};
+                    info.state = opt;
+                    var res = buf.unpack('LLLLC');
+                    info.window = res[0];
+                    info.until = res[1];
+                    info.idle = res[2];
+                    info.eventMask = res[3];
+                    info.kind = res[4]
+                    return info;
+                },
+                callback
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.eventMask = {
+            Notify: 1,
+            Cycle: 2
+        };
+
+        ext.SelectInput = function( drawable, eventMask )
+        {
+            X.seq_num++;
+            console.log('CCSLL', [ext.majorOpcode, 2, 3, drawable, eventMask]);
+            X.pack_stream.pack('CCSLL', [ext.majorOpcode, 2, 3, drawable, eventMask]);
+            X.pack_stream.flush();
+        }
+
+        ext.QueryVersion(1, 1, function(err, vers) {
+            if (err)
+                return callback(err);
+            ext.major = vers[0];
+            ext.minor = vers[1];
+            callback(null, ext);
+        });
+
+        ext.events = {
+            ScreenSaverNotify: 0
+        }
+
+        ext.NotifyState = {
+            Off: 0,
+            On: 1,
+            Cycle: 2
+        }
+
+        X.eventParsers[ext.firstEvent + ext.events.ScreenSaverNotify] = function(type, seq, extra, code, raw)
+        {
+            var event = {};
+            event.state = code;
+            event.seq = seq;
+            event.time = extra;
+            // CCSL = type, code, seq, extra
+            var values = raw.unpack('LLCC');
+            event.root = values[0];
+            event.saverWindow = values[1];
+            event.kind = values[2];
+            event.forced = values[1];
+            event.name = 'ScreenSaverNotify';
+            return event;
+        };
+    });
+}