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/*
* Copyright 2006 Sascha Weinreuter
*
* 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.intention.impl;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.codeInsight.intention.LowPriorityAction;
import com.intellij.injected.editor.DocumentWindow;
import com.intellij.lang.Language;
import com.intellij.lang.injection.InjectedLanguageManager;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.EditorFactory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.popup.Balloon;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.util.TextRange;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.*;
import com.intellij.psi.impl.source.tree.injected.InjectedLanguageUtil;
import com.intellij.psi.impl.source.tree.injected.Place;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import java.awt.*;
import java.util.List;
/**
* "Quick Edit Language" intention action that provides an editor which shows an injected language
* fragment's complete prefix and suffix in non-editable areas and allows to edit the fragment
* without having to consider any additional escaping rules (e.g. when editing regexes in String
* literals).
*
* @author Gregory Shrago
* @author Konstantin Bulenkov
*/
public class QuickEditAction implements IntentionAction, LowPriorityAction {
public static final Key<QuickEditHandler> QUICK_EDIT_HANDLER = Key.create("QUICK_EDIT_HANDLER");
public static final Key<Boolean> EDIT_ACTION_AVAILABLE = Key.create("EDIT_ACTION_AVAILABLE");
private String myLastLanguageName;
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
return getRangePair(file, editor) != null;
}
@Nullable
protected Pair<PsiElement, TextRange> getRangePair(final PsiFile file, final Editor editor) {
final int offset = editor.getCaretModel().getOffset();
final PsiLanguageInjectionHost host =
PsiTreeUtil.getParentOfType(file.findElementAt(offset), PsiLanguageInjectionHost.class, false);
if (host == null || ElementManipulators.getManipulator(host) == null) return null;
final List<Pair<PsiElement, TextRange>> injections = InjectedLanguageManager.getInstance(host.getProject()).getInjectedPsiFiles(host);
if (injections == null || injections.isEmpty()) return null;
final int offsetInElement = offset - host.getTextRange().getStartOffset();
final Pair<PsiElement, TextRange> rangePair = ContainerUtil.find(injections, new Condition<Pair<PsiElement, TextRange>>() {
@Override
public boolean value(final Pair<PsiElement, TextRange> pair) {
return pair.second.containsRange(offsetInElement, offsetInElement);
}
});
if (rangePair != null) {
final Language language = rangePair.first.getContainingFile().getLanguage();
final Object action = language.getUserData(EDIT_ACTION_AVAILABLE);
if (action != null && action.equals(false)) return null;
myLastLanguageName = language.getDisplayName();
}
return rangePair;
}
@Override
public void invoke(@NotNull final Project project, final Editor editor, PsiFile file) throws IncorrectOperationException {
invokeImpl(project, editor, file);
}
public QuickEditHandler invokeImpl(@NotNull final Project project, final Editor editor, PsiFile file) throws IncorrectOperationException {
final int offset = editor.getCaretModel().getOffset();
final Pair<PsiElement, TextRange> pair = getRangePair(file, editor);
assert pair != null;
final PsiFile injectedFile = (PsiFile)pair.first;
final int injectedOffset = ((DocumentWindow)PsiDocumentManager.getInstance(project).getDocument(injectedFile)).hostToInjected(offset);
QuickEditHandler handler = getHandler(project, injectedFile, editor, file);
if (!ApplicationManager.getApplication().isUnitTestMode()) {
handler.navigate(injectedOffset);
}
return handler;
}
@Override
public boolean startInWriteAction() {
return false;
}
@NotNull
private QuickEditHandler getHandler(Project project, PsiFile injectedFile, Editor editor, PsiFile origFile) {
QuickEditHandler handler = getExistingHandler(injectedFile);
if (handler != null && handler.isValid()) {
return handler;
}
handler = new QuickEditHandler(project, injectedFile, origFile, editor, this);
if (ApplicationManager.getApplication().isUnitTestMode()) {
// todo remove and hide QUICK_EDIT_HANDLER
injectedFile.putUserData(QUICK_EDIT_HANDLER, handler);
}
return handler;
}
public static QuickEditHandler getExistingHandler(PsiFile injectedFile) {
Place shreds = InjectedLanguageUtil.getShreds(injectedFile);
if (shreds == null) return null;
TextRange hostRange = TextRange.create(shreds.get(0).getHostRangeMarker().getStartOffset(),
shreds.get(shreds.size() - 1).getHostRangeMarker().getEndOffset());
for (Editor editor : EditorFactory.getInstance().getAllEditors()) {
QuickEditHandler handler = editor.getUserData(QUICK_EDIT_HANDLER);
if (handler != null && handler.changesRange(hostRange)) return handler;
}
return null;
}
protected boolean isShowInBalloon() {
return false;
}
@Nullable
protected JComponent createBalloonComponent(@NotNull PsiFile file) {
return null;
}
@Override
@NotNull
public String getText() {
return "Edit "+ StringUtil.notNullize(myLastLanguageName, "Injected")+" Fragment";
}
@Override
@NotNull
public String getFamilyName() {
return "Edit Injected Fragment";
}
public static Balloon.Position getBalloonPosition(Editor editor) {
final int line = editor.getCaretModel().getVisualPosition().line;
final Rectangle area = editor.getScrollingModel().getVisibleArea();
int startLine = area.y / editor.getLineHeight() + 1;
return (line - startLine) * editor.getLineHeight() < 200 ? Balloon.Position.below : Balloon.Position.above;
}
}
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