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// CommandManager.cs created with MonoDevelop
// User: dave at 9:58 AM 8/19/2007
//
// To change standard headers go to Edit->Preferences->Coding->Standard Headers
//
using System;
using System.Collections;
using System.Collections.Generic;
namespace Do.Core
{
public class CommandManager : GCObjectManager
{
private Hashtable commandLists;
public CommandManager()
{
commandLists = new Hashtable ();
}
public void AddCommand (Command command)
{
foreach (Type type in command.SupportedTypes) {
List<Command> commands;
if (!commandLists.ContainsKey (type)) {
commandLists[type] = new List<Command> ();
}
commands = commandLists[type] as List<Command>;
if (!commands.Contains (command)) {
commands.Add (command);
}
}
}
public Command[] CommandsForItem (Item item, string match) {
SearchContext context;
context = new SearchContext ();
context.Item = item;
context.CommandSearchString = match;
Search (context);
return context.Results as Command[];
}
private Command[] _CommandsForItem (Item item) {
List<Command> commands;
commands = new List<Command> ();
Type[] interfaces = item.IItem.GetType ().GetInterfaces ();
foreach (Type type in interfaces) {
if (commandLists.ContainsKey (type)) {
foreach (Command command in commandLists[type] as IEnumerable<Command>) {
if (command.SupportsItem (item.IItem)) {
commands.Add (command);
}
}
}
}
return commands.ToArray ();
}
protected override ContextRelation GetContextRelation (SearchContext a, SearchContext b)
{
if (a.Item == b.Item && a.CommandSearchString == b.CommandSearchString)
return ContextRelation.Repeat;
else if (a.Item == b.Item && a.CommandSearchString.StartsWith (b.CommandSearchString))
return ContextRelation.Continuation;
else
return ContextRelation.Fresh;
}
protected override void PerformSearch (SearchContext context)
{
int numScoreNonZero;
Command[] commands;
// Use intermediate search results if available.
if (context.Results == null) {
commands = _CommandsForItem (context.Item);
} else {
commands = context.Results as Command[];
}
// Score the commands based on the search string and sort them.
foreach (Command command in commands) {
command.Score = command.ScoreForAbbreviation (context.CommandSearchString);
}
Array.Sort<GCObject> (commands, new GCObjectScoreComparer ());
// Chop the array where the scores become zero
for (numScoreNonZero = 0; numScoreNonZero < commands.Length; ++numScoreNonZero) {
if (commands[numScoreNonZero].Score == 0) break;
}
Array.Resize<Command> (ref commands, numScoreNonZero);
context.Results = commands;
}
}
}
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