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//
// GtkMacDesktopBackend.cs
//
// Author:
// Lluis Sanchez Gual <lluis@xamarin.com>
//
// Copyright (c) 2014 Xamarin, Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Xwt.GtkBackend;
using AppKit;
using System.Drawing;
using System.IO;
using GTK = global::Gtk;
using CoreGraphics;
namespace Xwt.Gtk.Mac
{
public class GtkMacDesktopBackend: GtkDesktopBackend
{
public static Gdk.Pixbuf GetPixbufFromNSImage (NSImage icon, int width, int height)
{
var rect = new CGRect (0, 0, width, height);
var rep = icon.BestRepresentation (rect, null, null);
var bitmap = rep as NSBitmapImageRep;
try {
if (bitmap == null) {
if (rep != null)
rep.Dispose ();
using (var cgi = icon.AsCGImage (ref rect, null, null)) {
if (cgi == null)
return null;
bitmap = new NSBitmapImageRep (cgi);
}
}
return GetPixbufFromNSBitmapImageRep (bitmap, width, height);
} finally {
if (bitmap != null)
bitmap.Dispose ();
}
}
static Gdk.Pixbuf GetPixbufFromNSBitmapImageRep (NSBitmapImageRep bitmap, int width, int height)
{
byte[] data;
using (var tiff = bitmap.TiffRepresentation) {
data = new byte[tiff.Length];
System.Runtime.InteropServices.Marshal.Copy (tiff.Bytes, data, 0, data.Length);
}
int pw = (int)bitmap.PixelsWide, ph = (int)bitmap.PixelsHigh;
var pixbuf = new Gdk.Pixbuf (data, pw, ph);
// if one dimension matches, and the other is same or smaller, use as-is
if ((pw == width && ph <= height) || (ph == height && pw <= width))
return pixbuf;
// otherwise scale proportionally such that the largest dimension matches the desired size
if (pw == ph) {
pw = width;
ph = height;
} else if (pw > ph) {
ph = (int) (width * ((float) ph / pw));
pw = width;
} else {
pw = (int) (height * ((float) pw / ph));
ph = height;
}
var scaled = pixbuf.ScaleSimple (pw, ph, Gdk.InterpType.Bilinear);
pixbuf.Dispose ();
return scaled;
}
public override object GetFileIcon (string filename)
{
NSImage icon = null;
if (Path.IsPathRooted (filename) && File.Exists (filename)) {
icon = NSWorkspace.SharedWorkspace.IconForFile (filename);
} else {
string extension = Path.GetExtension (filename);
if (!string.IsNullOrEmpty (extension))
icon = NSWorkspace.SharedWorkspace.IconForFileType (extension);
}
if (icon == null) {
return base.GetFileIcon (filename);
}
int w, h;
if (!GTK.Icon.SizeLookup (GTK.IconSize.Menu, out w, out h)) {
w = h = 22;
}
var res = GetPixbufFromNSImage (icon, w, h);
return res != null ? new GtkImage (res) : base.GetFileIcon (filename);
}
}
}
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