/*
* 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.editorActions;
import com.intellij.codeInsight.CodeInsightSettings;
import com.intellij.lang.Language;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiFile;
abstract class AbstractIndentingBackspaceHandler extends BackspaceHandlerDelegate {
private final SmartBackspaceMode myMode;
private boolean myEnabled;
AbstractIndentingBackspaceHandler(SmartBackspaceMode mode) {
myMode = mode;
}
@Override
public void beforeCharDeleted(char c, PsiFile file, Editor editor) {
myEnabled = false;
if (editor.isColumnMode() || !StringUtil.isWhiteSpace(c)) {
return;
}
SmartBackspaceMode mode = getBackspaceMode(file.getLanguage());
if (mode != myMode) {
return;
}
doBeforeCharDeleted(c, file, editor);
myEnabled = true;
}
@Override
public boolean charDeleted(char c, PsiFile file, Editor editor) {
if (!myEnabled) {
return false;
}
return doCharDeleted(c, file, editor);
}
protected abstract void doBeforeCharDeleted(char c, PsiFile file, Editor editor);
protected abstract boolean doCharDeleted(char c, PsiFile file, Editor editor);
private static SmartBackspaceMode getBackspaceMode(Language language) {
SmartBackspaceMode mode = CodeInsightSettings.getInstance().getBackspaceMode();
BackspaceModeOverride override = LanguageBackspaceModeOverride.INSTANCE.forLanguage(language);
if (override != null) {
mode = override.getBackspaceMode(mode);
}
return mode;
}
}