using CPF.Mac.Foundation;
using CPF.Mac.ObjCRuntime;
using System;

namespace CPF.Mac.CoreGraphics
{
	public class CGPDFPageInfo
	{
		private static IntPtr kCGPDFContextMediaBox;

		private static IntPtr kCGPDFContextCropBox;

		private static IntPtr kCGPDFContextBleedBox;

		private static IntPtr kCGPDFContextTrimBox;

		private static IntPtr kCGPDFContextArtBox;

		public CGRect? MediaBox
		{
			get;
			set;
		}

		public CGRect? CropBox
		{
			get;
			set;
		}

		public CGRect? BleedBox
		{
			get;
			set;
		}

		public CGRect? TrimBox
		{
			get;
			set;
		}

		public CGRect? ArtBox
		{
			get;
			set;
		}

		static CGPDFPageInfo()
		{
			IntPtr handle = Dlfcn.dlopen("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics", 0);
			try
			{
				kCGPDFContextMediaBox = Dlfcn.GetIndirect(handle, "kCGPDFContextMediaBox");
				kCGPDFContextCropBox = Dlfcn.GetIndirect(handle, "kCGPDFContextCropBox");
				kCGPDFContextBleedBox = Dlfcn.GetIndirect(handle, "kCGPDFContextBleedBox");
				kCGPDFContextTrimBox = Dlfcn.GetIndirect(handle, "kCGPDFContextTrimBox");
				kCGPDFContextArtBox = Dlfcn.GetIndirect(handle, "kCGPDFContextArtBox");
			}
			finally
			{
				Dlfcn.dlclose(handle);
			}
		}

		private unsafe static void Add(NSMutableDictionary dict, IntPtr key, CGRect? val)
		{
			if (val.HasValue)
			{
				CGRect value = val.Value;
				NSData obj = NSData.FromBytes((IntPtr)(void*)(&value), 16uL);
				dict.LowlevelSetObject(obj, key);
			}
		}

		internal virtual NSMutableDictionary ToDictionary()
		{
			NSMutableDictionary nSMutableDictionary = new NSMutableDictionary();
			Add(nSMutableDictionary, kCGPDFContextMediaBox, MediaBox);
			Add(nSMutableDictionary, kCGPDFContextCropBox, CropBox);
			Add(nSMutableDictionary, kCGPDFContextBleedBox, BleedBox);
			Add(nSMutableDictionary, kCGPDFContextTrimBox, TrimBox);
			Add(nSMutableDictionary, kCGPDFContextArtBox, ArtBox);
			return nSMutableDictionary;
		}
	}
}