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// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package com.intellij.codeInsight.template.postfix.completion;
import com.intellij.codeInsight.completion.CompletionParameters;
import com.intellij.codeInsight.completion.CompletionProvider;
import com.intellij.codeInsight.completion.CompletionResultSet;
import com.intellij.codeInsight.completion.PrefixMatcher;
import com.intellij.codeInsight.template.CustomTemplateCallback;
import com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor;
import com.intellij.codeInsight.template.postfix.settings.PostfixTemplatesSettings;
import com.intellij.codeInsight.template.postfix.templates.PostfixLiveTemplate;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.patterns.StandardPatterns;
import com.intellij.psi.PsiFile;
import com.intellij.util.ProcessingContext;
import org.jetbrains.annotations.NotNull;
import static com.intellij.codeInsight.template.postfix.completion.PostfixTemplateCompletionContributor.getPostfixLiveTemplate;
class PostfixTemplatesCompletionProvider extends CompletionProvider<CompletionParameters> {
@Override
protected void addCompletions(@NotNull CompletionParameters parameters, @NotNull ProcessingContext context, @NotNull CompletionResultSet result) {
Editor editor = parameters.getEditor();
if (!isCompletionEnabled(parameters) || LiveTemplateCompletionContributor.shouldShowAllTemplates() ||
editor.getCaretModel().getCaretCount() != 1) {
/*
disabled or covered with {@link com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor}
*/
return;
}
PsiFile originalFile = parameters.getOriginalFile();
PostfixLiveTemplate postfixLiveTemplate = getPostfixLiveTemplate(originalFile, editor);
if (postfixLiveTemplate != null) {
postfixLiveTemplate.addCompletions(parameters, result.withPrefixMatcher(new MyPrefixMatcher(result.getPrefixMatcher().getPrefix())));
String possibleKey = postfixLiveTemplate.computeTemplateKeyWithoutContextChecking(new CustomTemplateCallback(editor, originalFile));
if (possibleKey != null) {
result = result.withPrefixMatcher(possibleKey);
result.restartCompletionOnPrefixChange(
StandardPatterns.string().oneOf(postfixLiveTemplate.getAllTemplateKeys(originalFile, parameters.getOffset())));
}
}
}
private static boolean isCompletionEnabled(@NotNull CompletionParameters parameters) {
ProgressManager.checkCanceled();
if (!parameters.isAutoPopup()) {
return false;
}
PostfixTemplatesSettings settings = PostfixTemplatesSettings.getInstance();
if (!settings.isPostfixTemplatesEnabled() || !settings.isTemplatesCompletionEnabled()) {
return false;
}
return true;
}
private static class MyPrefixMatcher extends PrefixMatcher {
protected MyPrefixMatcher(String prefix) {
super(prefix);
}
@Override
public boolean prefixMatches(@NotNull String name) {
return name.equalsIgnoreCase(myPrefix);
}
@NotNull
@Override
public PrefixMatcher cloneWithPrefix(@NotNull String prefix) {
return new MyPrefixMatcher(prefix);
}
}
}
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