From 68dd0c0f1bd028725d697ed2fc1f2ce33bb9682f Mon Sep 17 00:00:00 2001
From: rowanbeentje <rowan@beent.je>
Date: Thu, 5 Mar 2009 21:38:51 +0000
Subject:  - Fix a number of edit sheet crashers regarding opening and saving
 files, image deletions, and image drag and dropping (fixes Issue #85 and
 google groups report)  - Improves compatbility of drag-and-drops onto the
 image well, including support for image drags from other applications  -
 Attempt to automatically select the image or text tab in the edit sheet as
 appropriate  - Fixes build-from-clean warnings caused by an unexposed
 function added in r375

---
 Source/CMImageView.m | 84 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 72 insertions(+), 12 deletions(-)

(limited to 'Source/CMImageView.m')

diff --git a/Source/CMImageView.m b/Source/CMImageView.m
index 0eb4c250..de96fac5 100644
--- a/Source/CMImageView.m
+++ b/Source/CMImageView.m
@@ -27,22 +27,82 @@
 
 @implementation CMImageView
 
-- (NSString *)draggedFilePath
+
 /*
-returns the path of the dragged file
-*/
+ * On a drag and drop, read in dragged files and convert dragged images before passing
+ * them to the delegate for further processing
+ */
+- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
 {
-	return [NSString stringWithString:draggedFilePath];
-}
+	id delegateForUse = nil;
 
-- (void)concludeDragOperation:(id <NSDraggingInfo>)sender
-{
-	if ( draggedFilePath )
-		[draggedFilePath release];
+	// If the delegate or the delegate's content instance doesn't implement processUpdatedImageData:,
+	// return the super's implementation
+	if (delegate) {
+		if ([delegate respondsToSelector:@selector(processUpdatedImageData:)]) {
+			delegateForUse = delegate;
+		} else if ( [delegate valueForKey:@"tableContentInstance"]
+					&& [[delegate valueForKey:@"tableContentInstance"] respondsToSelector:@selector(processUpdatedImageData:)] ) {
+			delegateForUse = [delegate valueForKey:@"tableContentInstance"];
+		}
+	}
+	if (!delegateForUse) {
+		return [super performDragOperation:sender];
+	}
+
+	// If a filename is available, attempt to read it and pass it to the delegate
+	if ([[[sender draggingPasteboard] propertyListForType:@"NSFilenamesPboardType"] count]) {
+		[delegateForUse processUpdatedImageData:[NSData dataWithContentsOfFile:[[[sender draggingPasteboard] propertyListForType:@"NSFilenamesPboardType"] objectAtIndex:0]]];
+		return [super performDragOperation:sender];
+	}
+
+	// Otherwise, see if a dragged image is available via file contents or TIFF and pass to delegate
+	if ([[sender draggingPasteboard] dataForType:@"NSFileContentsPboardType"]) {
+		[delegateForUse processUpdatedImageData:[[sender draggingPasteboard] dataForType:@"NSFileContentsPboardType"]];
+		return [super performDragOperation:sender];
+	}
 
-	draggedFilePath = [[NSString stringWithString:[[[sender draggingPasteboard] propertyListForType:@"NSFilenamesPboardType"] objectAtIndex:0]] retain];
+	// For dragged image representations (in TIFF format), convert to PNG data for compatibility
+	if ([[sender draggingPasteboard] dataForType:@"NSTIFFPboardType"]) {
+		NSData *pngData = nil;
+		NSBitmapImageRep *draggedImage = [[NSBitmapImageRep alloc] initWithData:[[sender draggingPasteboard] dataForType:@"NSTIFFPboardType"]];
+		if (draggedImage) {
+			pngData = [draggedImage representationUsingType:NSPNGFileType properties:nil];
+			[draggedImage release];
+		}
+		if (pngData) {
+			[delegateForUse processUpdatedImageData:pngData];
+			return [super performDragOperation:sender];
+		}
+	}
+	
+	// For dragged image representations (in PICT format), convert to PNG data for compatibility
+	if ([[sender draggingPasteboard] dataForType:@"NSPICTPboardType"]) {
+		NSData *pngData = nil;
+		NSPICTImageRep *draggedImage = [[NSPICTImageRep alloc] initWithData:[[sender draggingPasteboard] dataForType:@"NSPICTPboardType"]];
+		if (draggedImage) {
+			NSImage *convertImage = [[NSImage alloc] initWithSize:[draggedImage size]];
+			[convertImage lockFocus];
+			[draggedImage drawInRect:[draggedImage boundingBox]];
+			NSBitmapImageRep *bitmapImageRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:[draggedImage boundingBox]];
+			if (bitmapImageRep) {
+				pngData = [bitmapImageRep representationUsingType:NSPNGFileType properties:nil];
+				[bitmapImageRep release];
+			}
+			[convertImage unlockFocus];
+			[convertImage release];
+			[draggedImage release];
+		}
+		if (pngData) {
+			[delegateForUse processUpdatedImageData:pngData];
+			return [super performDragOperation:sender];
+		}
+	}
 
-	[super concludeDragOperation:sender];
+	// The image was not processed - return failure and clear image representation.
+	[delegateForUse processUpdatedImageData:nil];
+	[self setImage:nil];
+	return NO;
 }
 
-@end
+@end
\ No newline at end of file
-- 
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