From d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Tue, 16 Oct 2018 10:08:48 +0200
Subject: Original 5.40

---
 OSX/Updater.m | 176 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100644 OSX/Updater.m

(limited to 'OSX/Updater.m')

diff --git a/OSX/Updater.m b/OSX/Updater.m
new file mode 100644
index 0000000..1bf29fa
--- /dev/null
+++ b/OSX/Updater.m
@@ -0,0 +1,176 @@
+/* xscreensaver, Copyright (c) 2013 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation.  No representations are made about the suitability of this
+ * software for any purpose.  It is provided "as is" without express or 
+ * implied warranty.
+ *
+ * XScreenSaverUpdater.app -- downloads and installs XScreenSaver updates
+ * via Sparkle.framework.
+ *
+ * Created: 7-Dec-2013
+ *
+ * NOTE: This does not work with Sparkle 1.5b6 -- it requires the "HEAD"
+ *       version 4-Dec-2013 or later.
+ */
+
+#import "Updater.h"
+#import "Sparkle/SUUpdater.h"
+
+@implementation XScreenSaverUpdater : NSObject
+
+- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
+{
+  NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
+  [defs registerDefaults:UPDATER_DEFAULTS];
+
+  // If it's not time to run the updater, then bail immediately.
+  // I'm not sure why this is necessary, but Sparkle seems to be
+  // checking too often.
+  //
+  if (! [self timeToCheck])
+    [[NSApplication sharedApplication] terminate:self];
+
+  // If the screen saver is not running, then launch the updater now.
+  // Otherwise, wait until the screen saver deactivates, and then do
+  // it.  This is because if the updater tries to pop up a dialog box
+  // while the screen saver is active, everything goes to hell and it
+  // never shows up.  You'd expect the dialog to just map below the
+  // screen saver window, but no.
+
+  if (! [self screenSaverActive]) {
+    [self runUpdater];
+  } else {
+    // Run the updater when the "screensaver.didstop" notification arrives.
+    [[NSDistributedNotificationCenter defaultCenter]
+      addObserver:self
+      selector:@selector(saverStoppedNotification:)
+      name:@"com.apple.screensaver.didstop"
+      object:nil];
+
+    // But I'm not sure I trust that, so also poll every couple minutes.
+    timer = [NSTimer scheduledTimerWithTimeInterval: 60 * 2
+                     target:self
+                     selector:@selector(pollSaverTermination:)
+                     userInfo:nil
+                     repeats:YES];
+  }
+}
+
+
+- (BOOL) timeToCheck
+{
+  NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
+  NSTimeInterval interval = [defs doubleForKey:@SUScheduledCheckIntervalKey];
+  NSDate *last = [defs objectForKey:@SULastCheckTimeKey];
+  if (!interval || !last)
+    return YES;
+  NSTimeInterval since = [[NSDate date] timeIntervalSinceDate:last];
+  return (since > interval);
+}
+
+
+// Whether ScreenSaverEngine is currently running, meaning screen is blanked.
+// There's no easy way to determine this other than scanning the process table.
+//
+- (BOOL) screenSaverActive
+{
+  BOOL found = NO;
+  NSString *target = @"/ScreenSaverEngine.app";
+  ProcessSerialNumber psn = { kNoProcess, kNoProcess };
+  while (GetNextProcess(&psn) == noErr) {
+    CFDictionaryRef cfdict =
+      ProcessInformationCopyDictionary (&psn,
+        kProcessDictionaryIncludeAllInformationMask);
+    if (cfdict) {
+      NSDictionary *dict = (NSDictionary *) cfdict;
+      NSString *path = [dict objectForKey:@"BundlePath"];
+      if (path && [path hasSuffix:target])
+        found = YES;
+      CFRelease (cfdict);
+    }
+    if (found)
+      break;
+  }
+  return found;
+}
+
+
+- (void) saverStoppedNotification:(NSNotification *)note
+{
+  [self runUpdater];
+}
+
+
+- (void) pollSaverTermination:(NSTimer *)t
+{
+  if (! [self screenSaverActive])
+    [self runUpdater];
+}
+
+
+- (void) runUpdater
+{
+  if (timer) {
+    [timer invalidate];
+    timer = nil;
+  }
+
+  SUUpdater *updater = [SUUpdater updaterForBundle:
+                                    [NSBundle bundleForClass:[self class]]];
+  [updater setDelegate:self];
+
+  // Launch the updater thread.
+  [updater checkForUpdatesInBackground];
+
+  // Now we need to wait for the Sparkle thread to finish before we can
+  // exit, so just poll waiting for it.
+  //
+  [NSTimer scheduledTimerWithTimeInterval:1
+           target:self
+           selector:@selector(pollUpdaterTermination:)
+           userInfo:updater
+           repeats:YES];
+}
+
+
+// Delegate method that lets us append extra info to the system-info URL.
+//
+- (NSArray *) feedParametersForUpdater:(SUUpdater *)updater
+                  sendingSystemProfile:(BOOL)sending
+{
+  // Get the name of the saver that invoked us, and include that in the
+  // system info.
+  NSString *saver = [[[NSProcessInfo processInfo] environment]
+                      objectForKey:@"XSCREENSAVER_CLASSPATH"];
+  if (! saver) return @[];
+  NSString *head = @"org.jwz.xscreensaver.";
+  if ([saver hasPrefix:head])
+    saver = [saver substringFromIndex:[head length]];
+
+  return @[ @{ @"key":		@"saver",
+               @"value":	saver,
+               @"displayKey":	@"Current Saver",
+               @"displayValue":	saver
+             }
+          ];
+}
+
+
+- (void) pollUpdaterTermination:(NSTimer *)t
+{
+  SUUpdater *updater = [t userInfo];
+  if (![updater updateInProgress])
+    [[NSApplication sharedApplication] terminate:self];
+}
+
+
+- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app
+{
+  return YES;
+}
+
+@end
-- 
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