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//
// XwtComponent.cs
//
// Author:
// Lluis Sanchez <lluis@xamarin.com>
//
// Copyright (c) 2011 Xamarin Inc
//
// 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.ComponentModel;
using Xwt.Engine;
using System.Collections.Generic;
using System.Reflection;
using Xwt.Backends;
namespace Xwt
{
public abstract class XwtComponent: Component, IFrontend
{
BackendHost backendHost;
public XwtComponent ()
{
backendHost = CreateBackendHost ();
backendHost.Parent = this;
}
protected virtual BackendHost CreateBackendHost ()
{
return new BackendHost ();
}
protected BackendHost BackendHost {
get { return backendHost; }
}
object IFrontend.Backend {
get { return backendHost.Backend; }
}
protected static void MapEvent (object eventId, Type type, string methodName)
{
EventUtil.MapEvent (eventId, type, methodName);
}
}
class EventUtil
{
static Dictionary<Type, List<EventMap>> overridenEventMap = new Dictionary<Type, List<EventMap>> ();
static Dictionary<Type, HashSet<object>> overridenEvents = new Dictionary<Type, HashSet<object>> ();
public static void MapEvent (object eventId, Type type, string methodName)
{
List<EventMap> events;
if (!overridenEventMap.TryGetValue (type, out events)) {
events = new List<EventMap> ();
overridenEventMap [type] = events;
}
EventMap emap = new EventMap () {
MethodName = methodName,
EventId = eventId
};
events.Add (emap);
}
public static HashSet<object> GetDefaultEnabledEvents (Type type)
{
HashSet<object> defaultEnabledEvents;
if (!overridenEvents.TryGetValue (type, out defaultEnabledEvents)) {
defaultEnabledEvents = new HashSet<object> ();
Type t = type;
while (t != typeof(Component)) {
List<EventMap> emaps;
if (overridenEventMap.TryGetValue (t, out emaps)) {
foreach (var emap in emaps) {
if (IsOverriden (emap, type, t))
defaultEnabledEvents.Add (emap.EventId);
}
}
t = t.BaseType;
}
overridenEvents [type] = defaultEnabledEvents;
}
return defaultEnabledEvents;
}
static bool IsOverriden (EventMap emap, Type thisType, Type t)
{
var method = thisType.GetMethod (emap.MethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
return method.DeclaringType != t;
}
}
}
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