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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.codeInsight.lookup.impl;
import com.intellij.codeInsight.AutoPopupController;
import com.intellij.codeInsight.CodeInsightUtilBase;
import com.intellij.codeInsight.completion.CodeCompletionFeatures;
import com.intellij.codeInsight.completion.CompletionPhase;
import com.intellij.codeInsight.completion.CompletionProgressIndicator;
import com.intellij.codeInsight.completion.PrefixMatcher;
import com.intellij.codeInsight.completion.impl.CompletionServiceImpl;
import com.intellij.codeInsight.editorActions.AutoHardWrapHandler;
import com.intellij.codeInsight.editorActions.TypedHandler;
import com.intellij.codeInsight.lookup.CharFilter;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.codeInsight.lookup.LookupManager;
import com.intellij.codeInsight.lookup.impl.actions.ChooseItemAction;
import com.intellij.codeInsight.template.impl.TemplateSettings;
import com.intellij.codeInsight.template.impl.editorActions.TypedActionHandlerBase;
import com.intellij.featureStatistics.FeatureUsageTracker;
import com.intellij.ide.DataManager;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.EditorModificationUtil;
import com.intellij.openapi.editor.actionSystem.TypedActionHandler;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiUtilBase;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Arrays;
public class LookupTypedHandler extends TypedActionHandlerBase {
public LookupTypedHandler(@Nullable TypedActionHandler originalHandler) {
super(originalHandler);
}
@Override
public void execute(@NotNull Editor originalEditor, char charTyped, @NotNull DataContext dataContext) {
final Project project = CommonDataKeys.PROJECT.getData(dataContext);
PsiFile file;
if (project == null
|| (file = PsiUtilBase.getPsiFileInEditor(originalEditor, project)) == null
|| !CodeInsightUtilBase.prepareEditorForWrite(originalEditor)
|| !FileDocumentManager.getInstance().requestWriting(originalEditor.getDocument(), project)) {
if (myOriginalHandler != null){
myOriginalHandler.execute(originalEditor, charTyped, dataContext);
}
return;
}
CompletionPhase oldPhase = CompletionServiceImpl.getCompletionPhase();
if (oldPhase instanceof CompletionPhase.CommittingDocuments && ((CompletionPhase.CommittingDocuments)oldPhase).isRestartingCompletion()) {
assert oldPhase.indicator != null;
oldPhase.indicator.scheduleRestart();
}
Editor editor = TypedHandler.injectedEditorIfCharTypedIsSignificant(charTyped, originalEditor, file);
if (editor != originalEditor) {
file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());
}
if (originalEditor.isInsertMode() && beforeCharTyped(charTyped, project, originalEditor, editor, file)) {
return;
}
if (myOriginalHandler != null) {
myOriginalHandler.execute(originalEditor, charTyped, dataContext);
}
}
private static boolean beforeCharTyped(final char charTyped,
Project project,
final Editor originalEditor,
final Editor editor,
PsiFile file) {
final LookupImpl lookup = (LookupImpl)LookupManager.getActiveLookup(originalEditor);
if (lookup == null){
return false;
}
if (charTyped == ' ' && ChooseItemAction.hasTemplatePrefix(lookup, TemplateSettings.SPACE_CHAR)) {
return false;
}
final CharFilter.Result result = getLookupAction(charTyped, lookup);
if (lookup.isLookupDisposed()) {
return false;
}
if (result == CharFilter.Result.ADD_TO_PREFIX) {
Document document = editor.getDocument();
long modificationStamp = document.getModificationStamp();
if (!lookup.performGuardedChange(new Runnable() {
@Override
public void run() {
EditorModificationUtil.typeInStringAtCaretHonorMultipleCarets(originalEditor, String.valueOf(charTyped), true);
}
})) {
return true;
}
lookup.appendPrefix(charTyped);
if (lookup.isStartCompletionWhenNothingMatches() && lookup.getItems().isEmpty()) {
final CompletionProgressIndicator completion = CompletionServiceImpl.getCompletionService().getCurrentCompletion();
if (completion != null) {
completion.scheduleRestart();
} else {
AutoPopupController.getInstance(editor.getProject()).scheduleAutoPopup(editor);
}
}
AutoHardWrapHandler.getInstance().wrapLineIfNecessary(editor, DataManager.getInstance().getDataContext(editor.getContentComponent()), modificationStamp);
final CompletionProgressIndicator completion = CompletionServiceImpl.getCompletionService().getCurrentCompletion();
if (completion != null) {
completion.prefixUpdated();
}
return true;
}
if (result == CharFilter.Result.SELECT_ITEM_AND_FINISH_LOOKUP && lookup.isFocused()) {
LookupElement item = lookup.getCurrentItem();
if (item != null) {
if (completeTillTypedCharOccurrence(charTyped, lookup, item)) {
return true;
}
FeatureUsageTracker.getInstance().triggerFeatureUsed(CodeCompletionFeatures.EDITING_COMPLETION_FINISH_BY_DOT_ETC);
lookup.finishLookup(charTyped);
return true;
}
}
lookup.hide();
TypedHandler.autoPopupCompletion(editor, charTyped, project, file);
return false;
}
private static boolean completeTillTypedCharOccurrence(char charTyped, LookupImpl lookup, LookupElement item) {
PrefixMatcher matcher = lookup.itemMatcher(item);
final String oldPrefix = matcher.getPrefix() + lookup.getAdditionalPrefix();
PrefixMatcher expanded = matcher.cloneWithPrefix(oldPrefix + charTyped);
if (expanded.prefixMatches(item)) {
for (String s : item.getAllLookupStrings()) {
if (matcher.prefixMatches(s)) {
int i = -1;
while (true) {
i = s.indexOf(charTyped, i + 1);
if (i < 0) break;
final String newPrefix = s.substring(0, i + 1);
if (expanded.prefixMatches(newPrefix)) {
lookup.replacePrefix(oldPrefix, newPrefix);
return true;
}
}
}
}
}
return false;
}
static CharFilter.Result getLookupAction(final char charTyped, final LookupImpl lookup) {
final CharFilter.Result filtersDecision = getFiltersDecision(charTyped, lookup);
final LookupElement currentItem = lookup.getCurrentItem();
if (currentItem != null && charTyped != ' ') {
String postfix = lookup.getAdditionalPrefix() + charTyped;
final PrefixMatcher matcher = lookup.itemMatcher(currentItem);
for (String lookupString : currentItem.getAllLookupStrings()) {
if (lookupString.startsWith(matcher.getPrefix() + postfix)) {
return CharFilter.Result.ADD_TO_PREFIX;
}
}
}
if (filtersDecision != null) {
return filtersDecision;
}
throw new AssertionError("Typed char not handler by char filter: c=" + charTyped +
"; prefix=" + currentItem +
"; filters=" + Arrays.toString(getFilters()));
}
@Nullable
private static CharFilter.Result getFiltersDecision(char charTyped, LookupImpl lookup) {
LookupElement item = lookup.getCurrentItem();
int prefixLength = item == null ? lookup.getAdditionalPrefix().length(): lookup.itemPattern(item).length();
for (final CharFilter extension : getFilters()) {
final CharFilter.Result result = extension.acceptChar(charTyped, prefixLength, lookup);
if (result != null) {
return result;
}
}
return null;
}
private static CharFilter[] getFilters() {
return Extensions.getExtensions(CharFilter.EP_NAME);
}
}
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