1 files changed, 95 insertions, 0 deletions
diff --git a/OSX/grabclient-ios.m b/OSX/grabclient-ios.m
new file mode 100644
index 0000000..b016eb1
--- /dev/null
+++ b/OSX/grabclient-ios.m
@@ -0,0 +1,95 @@
+/* xscreensaver, Copyright (c) 1992-2017 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.
+ */
+
+/* iOS 8+ code to choose and return a random image from the photo library.
+ */
+
+#ifdef USE_IPHONE  // whole file
+
+#import <Photos/Photos.h>
+#import "grabscreen.h"
+#import "yarandom.h"
+
+void
+ios_load_random_image (void (*callback) (void *uiimage, const char *fn,
+                                         int width, int height,
+                                         void *closure),
+                       void *closure,
+                       int width, int height)
+{
+  // If the user has not yet been asked for authoriziation, pop up the
+  // auth dialog now and re-invoke this function once it has been
+  // answered.  The callback will run once there has been a Yes or No.
+  // Otherwise, we'd return right away with colorbars even if the user
+  // then went on to answer Yes.
+  //
+  PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
+  if (status == PHAuthorizationStatusNotDetermined) {
+    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
+      ios_load_random_image (callback, closure, width, height);
+    }];
+    return;
+  }
+
+  // The rest of this is synchronous.
+
+  PHFetchOptions *opt = [PHFetchOptions new];
+  opt.includeAssetSourceTypes = (PHAssetSourceTypeUserLibrary |
+                                 PHAssetSourceTypeCloudShared |
+                                 PHAssetSourceTypeiTunesSynced);
+  PHFetchResult *r = [PHAsset
+                       fetchAssetsWithMediaType: PHAssetMediaTypeImage
+                       options: opt];
+  NSUInteger n = [r count];
+  PHAsset *asset = n ? [r objectAtIndex: random() % n] : NULL;
+
+  __block UIImage *img = 0;
+  __block const char *fn = 0;
+
+  if (asset) {
+    PHImageRequestOptions *opt = [[PHImageRequestOptions alloc] init];
+    opt.synchronous = YES;
+
+    // Get the image bits.
+    //
+    int size = width > height ? width : height;
+    [[PHImageManager defaultManager]
+      requestImageForAsset: asset
+      targetSize: CGSizeMake (size, size)
+      contentMode: PHImageContentModeDefault
+      options: opt
+      resultHandler:^void (UIImage *image, NSDictionary *info) {
+        img = image;
+    }];
+
+    // Get the image name.
+    //
+    [[PHImageManager defaultManager]
+      requestImageDataForAsset: asset
+      options: opt
+      resultHandler:^(NSData *imageData, NSString *dataUTI,
+                      UIImageOrientation orientation, 
+                      NSDictionary *info) {
+        // Looks like UIImage is pre-rotated to compensate for 'orientation'.
+        NSString *path = [info objectForKey:@"PHImageFileURLKey"];
+        if (path)
+          fn = [[[path lastPathComponent] stringByDeletingPathExtension]
+                 cStringUsingEncoding:NSUTF8StringEncoding];
+    }];
+  }
+
+  if (img)
+    callback (img, fn, [img size].width, [img size].height, closure);
+  else
+    callback (0, 0, 0, 0, closure);
+}
+
+#endif  // USE_IPHONE - whole file