1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Linq;
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24 | using System.Threading.Tasks;
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25 | using ICSharpCode.AvalonEdit.CodeCompletion;
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26 | using ICSharpCode.NRefactory.Editor;
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27 | using Timer = System.Timers.Timer;
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28 |
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29 | namespace HeuristicLab.CodeEditor {
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30 | internal abstract class CodeCompletionStrategy : ICodeCompletionStrategy {
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31 | protected readonly CodeEditor codeEditor;
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32 | protected readonly Timer parserTimer;
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33 | protected IDocument document;
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34 |
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35 | protected CodeCompletionStrategy(CodeEditor codeEditor) {
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36 | this.codeEditor = codeEditor;
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37 | this.codeEditor.TextEditorTextChanged += codeEditor_TextEditorTextChanged;
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38 | parserTimer = new Timer(1000);
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39 | parserTimer.Elapsed += (sender, args) => Task.Run(() => {
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40 | DoParseStep();
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41 | if (codeEditor.IsDisposed && parserTimer.Enabled) {
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42 | parserTimer.Stop();
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43 | parserTimer.Dispose();
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44 | }
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45 | });
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46 | }
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47 |
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48 | public virtual void DoCodeCompletion(bool controlSpace) {
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49 | var codeCompletionResult = GetCodeCompletionResult(controlSpace);
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50 | ApplyCodeCompletionData(codeCompletionResult);
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51 | }
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52 |
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53 | public virtual void Initialize() {
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54 | parserTimer.Enabled = true;
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55 | }
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56 |
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57 | protected abstract CodeCompletionResult GetCodeCompletionResult(bool controlSpace);
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58 | protected abstract void DoParseStep();
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59 |
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60 | protected virtual void ApplyCodeCompletionData(CodeCompletionResult codeCompletionResult) {
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61 | var textArea = codeEditor.TextEditor.TextArea;
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62 | var document = codeEditor.TextEditor.Document;
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63 | int offset = codeEditor.TextEditor.CaretOffset;
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64 |
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65 | if (codeEditor.OverloadInsightWindow == null && codeCompletionResult.OverloadProvider != null) {
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66 | var iw = codeEditor.OverloadInsightWindow = new OverloadInsightWindow(textArea);
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67 | iw.Provider = codeCompletionResult.OverloadProvider;
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68 | iw.Show();
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69 | iw.Closed += (sender, args) => codeEditor.OverloadInsightWindow = null;
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70 | }
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71 |
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72 | if (codeEditor.CompletionWindow == null && codeCompletionResult.CompletionData.Any()) {
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73 | var cw = codeEditor.CompletionWindow = new CompletionWindow(textArea);
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74 | cw.CloseWhenCaretAtBeginning = true;
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75 | cw.StartOffset -= codeCompletionResult.TriggerWordLength;
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76 | cw.Closed += (sender, args) => codeEditor.CompletionWindow = null;
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77 |
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78 | var data = cw.CompletionList.CompletionData;
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79 | var newData = codeCompletionResult.CompletionData.OrderBy(x => x.Text).ToArray();
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80 | foreach (var completion in newData)
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81 | data.Add(completion);
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82 |
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83 | if (codeCompletionResult.TriggerWordLength > 0)
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84 | cw.CompletionList.SelectItem(codeCompletionResult.TriggerWord);
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85 |
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86 | cw.Show();
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87 | }
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88 |
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89 | if (codeEditor.OverloadInsightWindow != null) {
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90 | var iw = codeEditor.OverloadInsightWindow;
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91 | var provider = iw.Provider as IUpdatableOverloadProvider;
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92 | if (provider != null) {
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93 | provider.Update(document, offset);
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94 | if (provider.RequestClose) {
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95 | iw.Close();
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96 | }
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97 | }
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98 | }
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99 | }
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100 |
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101 | private void codeEditor_TextEditorTextChanged(object sender, EventArgs e) {
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102 | var doc = codeEditor.TextEditor.Document;
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103 | document = new ReadOnlyDocument(doc, doc.FileName);
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104 | }
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105 | }
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106 | }
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