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//
// TextMateCompletionTextEditorExtension.cs
//
// Author:
// Mike Krüger <mikkrg@microsoft.com>
//
// Copyright (c) 2016 Microsoft Corporation
//
// 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.Threading;
using System.Threading.Tasks;
using MonoDevelop.Ide.CodeCompletion;
using MonoDevelop.Ide.Editor.Extension;
using MonoDevelop.Ide.CodeTemplates;
using System.Collections.Generic;
using System.Text;
using MonoDevelop.Core.Text;
using MonoDevelop.Ide.TypeSystem;
namespace MonoDevelop.Ide.Editor.TextMate
{
class TextMateCompletionTextEditorExtension : CompletionTextEditorExtension
{
bool inactive;
public override bool CanRunCompletionCommand ()
{
return true;
}
protected override void Initialize ()
{
inactive = false;
// check if there is any other active completion extension
// -> if so that one is disabled automatically
var ext = Editor.TextEditorExtensionChain;
while (ext != null) {
var completionTextEditorExtension = ext as CompletionTextEditorExtension;
if (completionTextEditorExtension != null && ext != this) {
if (completionTextEditorExtension.IsValidInContext (DocumentContext))
inactive = true;
}
ext = ext.Next;
}
DocumentContext.DocumentParsed += DocumentContext_DocumentParsed;
base.Initialize ();
}
public override void Dispose ()
{
DocumentContext.DocumentParsed -= DocumentContext_DocumentParsed;
base.Dispose ();
}
void DocumentContext_DocumentParsed (object sender, EventArgs e)
{
if (!inactive && DocumentContext.ParsedDocument != null)
inactive = (DocumentContext.ParsedDocument.Flags & ParsedDocumentFlags.HasCustomCompletionExtension) == ParsedDocumentFlags.HasCustomCompletionExtension;
}
internal protected override bool IsActiveExtension ()
{
return !inactive;
}
static Task<IEnumerable<string>> GetAllWords(ITextSource source, int offset)
{
return Task.Run (delegate {
var result = new HashSet<string> ();
var sb = new StringBuilder ();
int i = 0;
while (i < source.Length) {
char ch = source[i];
if (char.IsLetter (ch) || ch == '_') {
sb.Append (ch);
i++;
while (i < source.Length) {
ch = source[i];
if (char.IsLetterOrDigit (ch) || ch == '_') {
sb.Append (ch);
} else {
break;
}
i++;
}
if (sb.Length > 1 && offset != i) {
result.Add (sb.ToString ());
}
sb.Length = 0;
continue;
}
i++;
}
return (IEnumerable<string>)result;
});
}
public override async Task<ICompletionDataList> HandleCodeCompletionAsync (CodeCompletionContext completionContext, CompletionTriggerInfo triggerInfo, CancellationToken token)
{
if (inactive)
return await base.HandleCodeCompletionAsync (completionContext, triggerInfo, token);
if (Editor.MimeType == "text/plain")
return null;
if (!IdeApp.Preferences.EnableAutoCodeCompletion)
return null;
if (triggerInfo.CompletionTriggerReason != CompletionTriggerReason.CharTyped)
return null;
char completionChar = triggerInfo.TriggerCharacter.Value;
int triggerWordLength = 0;
if (char.IsLetterOrDigit (completionChar) || completionChar == '_') {
if (completionContext.TriggerOffset > 1 && char.IsLetterOrDigit (Editor.GetCharAt (completionContext.TriggerOffset - 2)))
return null;
triggerWordLength = 1;
} else {
return null;
}
var result = new CompletionDataList ();
result.TriggerWordLength = triggerWordLength;
result.AutoSelect = false;
result.AutoCompleteEmptyMatch = false;
result.AutoCompleteUniqueMatch = false;
result.AutoCompleteEmptyMatchOnCurlyBrace = false;
foreach (var ct in await CodeTemplateService.GetCodeTemplatesAsync (Editor, token)) {
if (string.IsNullOrEmpty (ct.Shortcut) || ct.CodeTemplateContext != CodeTemplateContext.Standard)
continue;
result.Add (new CodeTemplateCompletionData (this, ct));
}
foreach (var word in await GetAllWords (Editor.CreateSnapshot (), Editor.CaretOffset)) {
result.Add (new CompletionData (word));
}
if (result.Count == 0)
return null;
return result;
}
}
}
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