From http://www.jwz.org/xscreensaver/xscreensaver-5.36.tar.gz

[xscreensaver] / OSX / textclient-ios.m

diff --git a/OSX/textclient-ios.m b/OSX/textclient-ios.m
new file mode 100644 (file)
index 0000000..5db5311
--- /dev/null
+++ b/OSX/textclient-ios.m
@@ -0,0 +1,129 @@
+/* xscreensaver, Copyright (c) 2012-2016 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.
+ *
+ * Loading URLs and returning the underlying text.
+ *
+ * This is necessary because iOS doesn't have Perl installed, so we can't
+ * run "xscreensaver-text" to do this.
+ */
+
+#include "utils.h"
+
+#ifdef USE_IPHONE // whole file
+
+#include "textclient.h"
+
+char *
+textclient_mobile_date_string (void)
+{
+  UIDevice *dd = [UIDevice currentDevice];
+  NSString *name = [dd name];                  // My iPhone
+  NSString *model = [dd model];                        // iPad
+  // NSString *system = [dd systemName];       // iPhone OS
+  NSString *vers = [dd systemVersion];         // 5.0
+  NSString *date =
+    [NSDateFormatter
+      localizedStringFromDate:[NSDate date]
+      dateStyle: NSDateFormatterMediumStyle
+      timeStyle: NSDateFormatterMediumStyle];
+  NSString *nl = @"\n";
+
+  NSString *result = name;
+  result = [result stringByAppendingString: nl];
+  result = [result stringByAppendingString: model];
+  // result = [result stringByAppendingString: nl];
+  // result = [result stringByAppendingString: system];
+  result = [result stringByAppendingString: @" "];
+  result = [result stringByAppendingString: vers];
+  result = [result stringByAppendingString: nl];
+  result = [result stringByAppendingString: nl];
+  result = [result stringByAppendingString: date];
+  result = [result stringByAppendingString: nl];
+  result = [result stringByAppendingString: nl];
+  return strdup ([result cStringUsingEncoding:NSISOLatin1StringEncoding]);
+}
+
+
+@interface TextLoader : NSObject
+@property (nonatomic, retain) NSURL *url;
+@property (nonatomic, retain) NSString *result;
+@end
+
+@implementation TextLoader
+{
+  NSURL    *_url;
+  NSString *_result;
+}
+
++ (TextLoader *) sharedLoader
+{
+  static TextLoader *singleton = nil;
+  @synchronized(self) {
+    if (!singleton)
+      singleton = [[self alloc] init];
+  }
+  return singleton;
+}
+
+- (void) startLoading
+{
+  // NSLog(@"textclient thread loading %@", self.url);
+  self.result = [NSString stringWithContentsOfURL: self.url
+                          encoding: NSUTF8StringEncoding
+                          error: nil];
+  // NSLog(@"textclient thread finished %@ (length %d)", self.url,
+  //      (unsigned int) [self.result length]);
+}
+
+@end
+
+
+
+/* Returns the contents of the URL.
+   Loads the URL in a background thread: if the URL has not yet loaded,
+   this will return NULL. Once the URL has completely loaded, the full
+   contents will be returned.  Calling this again after that starts the
+   URL loading again.
+ */
+char *
+textclient_mobile_url_string (Display *dpy, const char *url)
+{
+  TextLoader *loader = [TextLoader sharedLoader];
+  NSString *result = [loader result];
+
+  // Since this is a singleton, it's possible that if hack #1 starts
+  // URL #1 loading and then quickly exits, and then hack #2 asks for
+  // URL #2, it might get URL #1 instead.  Oh well, who cares.
+
+  if (result) {                                                // Thread finished
+    // NSLog(@"textclient finished %s (length %d)", url,
+    //       (unsigned int) [result length]);
+    char *s = strdup ([result cStringUsingEncoding:NSUTF8StringEncoding]);
+    loader.url    = nil;
+    loader.result = nil;
+    return s;
+
+  } else if ([loader url]) {                           // Waiting on thread
+    // NSLog(@"textclient waiting...");
+    return 0;
+
+  } else {                                             // Launch thread
+    // NSLog(@"textclient launching %s...", url);
+    loader.url =
+      [NSURL URLWithString:
+               [NSString stringWithCString: url
+                         encoding:NSISOLatin1StringEncoding]];
+    [NSThread detachNewThreadSelector: @selector(startLoading)
+              toTarget: loader withObject: nil];
+    return 0;
+  }
+}
+
+#endif // USE_IPHONE -- whole file