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@@ -5,14 +5,21 @@
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 ;;
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 ;; @copyright Copyright (c) 2007 Tim Burks, Neon Design Technology, Inc.
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-(global kPDFDisplaySinglePage 0)
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-(global NSDragOperationCopy 1)
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-(global NSPDFPboardType "Apple PDF pasteboard type")
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-(global NSDragPboard "Apple CFPasteboard drag")
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-(global NSRectClip (NuBridgedFunction functionWithName:"NSRectClip" signature:"v{_NSRect}"))
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-(global NSIntersectionRect (NuBridgedFunction functionWithName:"NSIntersectionRect" signature:"{_NSRect}{_NSRect}{_NSRect}"))
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-(global NSPointInRect (NuBridgedFunction functionWithName:"NSPointInRect" signature:"i{_NSPoint}{_NSRect}"))
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-(global NSFilenamesPboardType "NSFilenamesPboardType")
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-(global NSIntersectsRect (NuBridgedFunction functionWithName:"NSIntersectsRect" signature:"i{_NSRect}{_NSRect}"))
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-(global NSInsetRect (NuBridgedFunction functionWithName:"NSInsetRect" signature:"{_NSRect}{_NSRect}ff"))
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-(global NSSquareLineCapStyle 2)
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\ No newline at end of file
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+;; Switch on OS release.
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+(if (>= 9 ((((NSString stringWithShellCommand:"uname -r") componentsSeparatedByString:".") objectAtIndex:0) intValue))
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+    (then ;; Use Leopard BridgeSupport files
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+          (load "bridgesupport")
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+          (import AppKit)
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+          (import Quartz))
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+    (else ;; declare constants manually
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+          (global kPDFDisplaySinglePage 0)
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+          (global NSDragOperationCopy 1)
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+          (global NSPDFPboardType "Apple PDF pasteboard type")
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+          (global NSDragPboard "Apple CFPasteboard drag")
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+          (global NSRectClip (NuBridgedFunction functionWithName:"NSRectClip" signature:"v{_NSRect}"))
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+          (global NSIntersectionRect (NuBridgedFunction functionWithName:"NSIntersectionRect" signature:"{_NSRect}{_NSRect}{_NSRect}"))
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+          (global NSPointInRect (NuBridgedFunction functionWithName:"NSPointInRect" signature:"i{_NSPoint}{_NSRect}"))
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+          (global NSFilenamesPboardType "NSFilenamesPboardType")
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+          (global NSIntersectsRect (NuBridgedFunction functionWithName:"NSIntersectsRect" signature:"i{_NSRect}{_NSRect}"))
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+          (global NSInsetRect (NuBridgedFunction functionWithName:"NSInsetRect" signature:"{_NSRect}{_NSRect}ff"))
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+          (global NSSquareLineCapStyle 2)))
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\ No newline at end of file