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Add support to VS Code style snippets in code completion (#6339)
Added support for code completion snippets. Signed-off-by: Thomas Mäder <tmader@redhat.com>
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103 changes: 103 additions & 0 deletions
103
...org/eclipse/che/plugin/languageserver/ide/editor/codeassist/DocumentVariableResolver.java
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|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| /* | ||
| * Copyright (c) 2012-2017 Red Hat, Inc. | ||
| * All rights reserved. This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License v1.0 | ||
| * which accompanies this distribution, and is available at | ||
| * http://www.eclipse.org/legal/epl-v10.html | ||
| * | ||
| * Contributors: | ||
| * Red Hat, Inc. - initial API and implementation | ||
| */ | ||
| package org.eclipse.che.plugin.languageserver.ide.editor.codeassist; | ||
|
|
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.function.BiFunction; | ||
| import org.eclipse.che.ide.api.editor.document.Document; | ||
| import org.eclipse.che.ide.api.editor.text.TextPosition; | ||
| import org.eclipse.che.plugin.languageserver.ide.editor.codeassist.snippet.VariableResolver; | ||
|
|
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| /** | ||
| * Resolves snippet variables against an editor document. | ||
| * | ||
| * @author thomas | ||
| */ | ||
| public class DocumentVariableResolver implements VariableResolver { | ||
| // variables are functions from a document and position to a value. | ||
| private static final Map<String, BiFunction<Document, TextPosition, String>> VARIABLES; | ||
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|
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| static { | ||
| // well known variables according to https://github.com/Microsoft/vscode/blob/0ebd01213a65231f0af8187acaf264243629e4dc/src/vs/editor/contrib/snippet/browser/snippet.md | ||
| VARIABLES = new HashMap<>(); | ||
| VARIABLES.put("TM_SELECTED_TEXT", DocumentVariableResolver::getSelectedText); | ||
| VARIABLES.put("TM_CURRENT_LINE", DocumentVariableResolver::getCurrentLine); | ||
| VARIABLES.put("TM_CURRENT_WORD", DocumentVariableResolver::getCurrentWord); | ||
| VARIABLES.put("TM_LINE_INDEX", DocumentVariableResolver::getCurrentLineIndex); | ||
| VARIABLES.put("TM_LINE_NUMBER", DocumentVariableResolver::getCurrentLineNumber); | ||
| VARIABLES.put("TM_FILENAME", DocumentVariableResolver::getFileName); | ||
| VARIABLES.put("TM_DIRECTORY", DocumentVariableResolver::getDirectory); | ||
| VARIABLES.put("TM_FILEPATH", DocumentVariableResolver::getPath); | ||
| } | ||
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| private Document document; | ||
| private TextPosition position; | ||
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| public DocumentVariableResolver(Document document, TextPosition position) { | ||
| this.document = document; | ||
| this.position = position; | ||
| } | ||
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| @Override | ||
| public boolean isVar(String name) { | ||
| return VARIABLES.containsKey(name); | ||
| } | ||
|
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| @Override | ||
| public String resolve(String name) { | ||
| return VARIABLES.get(name).apply(document, position); | ||
| } | ||
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| private static String getSelectedText(Document doc, TextPosition pos) { | ||
| return doc.getContentRange(doc.getSelectedTextRange()); | ||
| } | ||
|
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| private static String getCurrentLine(Document doc, TextPosition pos) { | ||
| return doc.getLineContent(pos.getLine()); | ||
| } | ||
|
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| private static String getCurrentLineIndex(Document doc, TextPosition pos) { | ||
| return String.valueOf(pos.getLine()); | ||
| } | ||
|
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| private static String getCurrentLineNumber(Document doc, TextPosition pos) { | ||
| return String.valueOf(pos.getLine() + 1); | ||
| } | ||
|
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| private static String getFileName(Document doc, TextPosition pos) { | ||
| return doc.getFile().getName(); | ||
| } | ||
|
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| private static String getDirectory(Document doc, TextPosition pos) { | ||
| return doc.getFile().getLocation().parent().toString(); | ||
| } | ||
|
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| private static String getPath(Document doc, TextPosition pos) { | ||
| return doc.getFile().getLocation().toString(); | ||
| } | ||
|
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| private static String getCurrentWord(Document doc, TextPosition pos) { | ||
| String line = doc.getLineContent(pos.getLine()); | ||
| if (line.length() == 0) { | ||
| return ""; | ||
| } | ||
| int start = pos.getCharacter(); | ||
| int end = start; | ||
| while (start > 0 && !Character.isWhitespace(line.charAt(start - 1))) { | ||
| start--; | ||
| } | ||
| while (end < line.length() && !Character.isWhitespace(line.charAt(end))) { | ||
| end++; | ||
| } | ||
| return line.substring(start, end); | ||
| } | ||
| } |
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