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//
// Platform.cs
//
// Author:
// Michael Hutchinson <mhutchinson@novell.com>
//
// Copyright (c) 2009 Novell, Inc. (http://www.novell.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 System.Collections.Generic;
using System.Runtime.InteropServices;
using Gdk;
namespace Mono.TextEditor
{
public static class Platform
{
static Platform ()
{
IsWindows = System.IO.Path.DirectorySeparatorChar == '\\';
IsMac = !IsWindows && IsRunningOnMac();
IsX11 = !IsMac && System.Environment.OSVersion.Platform == PlatformID.Unix;
keymap.KeysChanged += delegate {
groupZeroMappings.Clear ();
};
}
static Gdk.Keymap keymap = Gdk.Keymap.Default;
public static bool IsMac { get; private set; }
public static bool IsX11 { get; private set; }
public static bool IsWindows { get; private set; }
//From Managed.Windows.Forms/XplatUI
static bool IsRunningOnMac ()
{
IntPtr buf = IntPtr.Zero;
try {
buf = Marshal.AllocHGlobal (8192);
// This is a hacktastic way of getting sysname from uname ()
if (uname (buf) == 0) {
string os = Marshal.PtrToStringAnsi (buf);
if (os == "Darwin")
return true;
}
} catch {
} finally {
if (buf != IntPtr.Zero)
Marshal.FreeHGlobal (buf);
}
return false;
}
[DllImport ("libc")]
static extern int uname (IntPtr buf);
//from MonoDevelop.Components.Commands.KeyBindingManager
internal static void MapRawKeys (Gdk.EventKey evt, out Gdk.Key key, out Gdk.ModifierType mod)
{
mod = evt.State;
key = evt.Key;
uint keyval;
int effectiveGroup, level;
Gdk.ModifierType consumedModifiers;
keymap.TranslateKeyboardState (evt.HardwareKeycode, evt.State, evt.Group, out keyval, out effectiveGroup,
out level, out consumedModifiers);
key = (Gdk.Key)keyval;
mod = evt.State & ~consumedModifiers;
//we restore the shift modifier if it was a letter, since those always get displayed uppercase
if (char.IsUpper ((char)Gdk.Keyval.ToUnicode (keyval)) && ((consumedModifiers & Gdk.ModifierType.ShiftMask) != 0))
mod |= Gdk.ModifierType.ShiftMask;
if (IsX11) {
//this is a workaround for a common X mapping issue
//where the alt key is mapped to the meta key when the shift modifier is active
if (key.Equals (Gdk.Key.Meta_L) || key.Equals (Gdk.Key.Meta_R))
key = Gdk.Key.Alt_L;
}
//HACK: the MAC GTK+ port currently does some horrible, un-GTK-ish key mappings
// so we work around them by playing some tricks to remap and decompose modifiers.
// We also decompose keys to the root physical key so that the Mac command
// combinations appear as expected, e.g. shift-{ is treated as shift-[.
if (IsMac && !IsX11) {
// Mac GTK+ maps the command key to the Mod1 modifier, which usually means alt/
// We map this instead to meta, because the Mac GTK+ has mapped the cmd key
// to the meta key (yay inconsistency!). IMO super would have been saner.
if ((mod & Gdk.ModifierType.Mod1Mask) != 0) {
mod ^= Gdk.ModifierType.Mod1Mask;
mod |= Gdk.ModifierType.MetaMask;
}
// If Mod5 is active it *might* mean that opt/alt is active,
// so we can unset this and map it back to the normal modifier.
if ((mod & Gdk.ModifierType.Mod5Mask) != 0) {
mod ^= Gdk.ModifierType.Mod5Mask;
mod |= Gdk.ModifierType.Mod1Mask;
}
// When opt modifier is active, we need to decompose this to make the command appear correct for Mac.
// In addition, we can only inspect whether the opt/alt key is pressed by examining
// the key's "group", because the Mac GTK+ treats opt as a group modifier and does
// not expose it as an actual GDK modifier.
if (evt.Group == (byte) 1) {
mod |= Gdk.ModifierType.Mod1Mask;
key = GetGroupZeroKey (key, evt);
}
}
//fix shift-tab brokenness
if (key == Gdk.Key.ISO_Left_Tab) {
key = Gdk.Key.Tab;
mod |= Gdk.ModifierType.ShiftMask;
}
}
static Dictionary<Gdk.Key,Gdk.Key> groupZeroMappings = new Dictionary<Gdk.Key,Gdk.Key> ();
static Gdk.Key GetGroupZeroKey (Gdk.Key mappedKey, Gdk.EventKey evt)
{
Gdk.Key ret;
if (groupZeroMappings.TryGetValue (mappedKey, out ret))
return ret;
//LookupKey isn't implemented on Mac, so we have to use this workaround
uint[] keyvals;
Gdk.KeymapKey [] keys;
keymap.GetEntriesForKeycode (evt.HardwareKeycode, out keys, out keyvals);
//find the key that has the same level (so we preserve shift) but with group 0
for (uint i = 0; i < keyvals.Length; i++)
if (keyvals[i] == (uint)mappedKey)
for (uint j = 0; j < keys.Length; j++)
if (keys[j].Group == 0 && keys[j].Level == keys[i].Level)
return groupZeroMappings[mappedKey] = ret = (Gdk.Key)keyvals[j];
//failed, but avoid looking it up again
return groupZeroMappings[mappedKey] = mappedKey;
}
}
}
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