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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.editorActions;
import com.intellij.codeInsight.AutoPopupController;
import com.intellij.lang.Language;
import com.intellij.lang.xml.XMLLanguage;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.Ref;
import com.intellij.psi.FileViewProvider;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiWhiteSpace;
import com.intellij.psi.impl.source.tree.injected.InjectedLanguageUtil;
import com.intellij.psi.templateLanguages.TemplateLanguageFileViewProvider;
import com.intellij.psi.xml.XmlTag;
import com.intellij.xml.util.XmlUtil;
public class XmlAutoPopupHandler extends TypedHandlerDelegate {
@Override
public Result checkAutoPopup(final char charTyped, final Project project, final Editor editor, final PsiFile file) {
final boolean isXmlLikeFile = file.getLanguage() instanceof XMLLanguage || file.getViewProvider().getBaseLanguage() instanceof XMLLanguage;
boolean spaceInTag = isXmlLikeFile && charTyped == ' ';
if (spaceInTag) {
spaceInTag = false;
final PsiElement at = file.findElementAt(editor.getCaretModel().getOffset());
if (at != null) {
final PsiElement parent = at.getParent();
if (parent instanceof XmlTag) {
spaceInTag = true;
}
}
}
if ((charTyped == '<' || charTyped == '{' || charTyped == '/' || spaceInTag) && isXmlLikeFile) {
autoPopupXmlLookup(project, editor);
return Result.STOP;
}
return Result.CONTINUE;
}
public static void autoPopupXmlLookup(final Project project, final Editor editor){
AutoPopupController.getInstance(project).autoPopupMemberLookup(editor, new Condition<PsiFile>() {
@Override
public boolean value(PsiFile file) {
int offset = editor.getCaretModel().getOffset();
PsiElement lastElement = InjectedLanguageUtil.findElementAtNoCommit(file, offset - 1);
if (lastElement instanceof PsiFile) { //the very end of an injected file
lastElement = file.findElementAt(offset - 1);
}
if (lastElement == null || !lastElement.isValid()) return false;
if (doCompleteIfNeeded(offset, file, lastElement)) {
return true;
}
FileViewProvider fileViewProvider = file.getViewProvider();
Language templateDataLanguage;
final PsiElement parent = lastElement.getParent();
if (fileViewProvider instanceof TemplateLanguageFileViewProvider &&
(templateDataLanguage = ((TemplateLanguageFileViewProvider)fileViewProvider).getTemplateDataLanguage()) != parent.getLanguage()) {
lastElement = fileViewProvider.findElementAt(offset - 1, templateDataLanguage);
if (lastElement == null || !lastElement.isValid()) return false;
return doCompleteIfNeeded(offset, file, lastElement);
}
return false;
}
});
}
private static boolean doCompleteIfNeeded(int offset, PsiFile file, PsiElement lastElement) {
final Ref<Boolean> isRelevantLanguage = new Ref<Boolean>();
final Ref<Boolean> isAnt = new Ref<Boolean>();
String text = lastElement.getText();
final int len = offset - lastElement.getTextRange().getStartOffset();
if (len < text.length()) {
text = text.substring(0, len);
}
if (text.equals("<") && isLanguageRelevant(lastElement, file, isRelevantLanguage, isAnt) ||
text.equals(" ") && isLanguageRelevant(lastElement, file, isRelevantLanguage, isAnt) ||
text.endsWith("${") && isLanguageRelevant(lastElement, file, isRelevantLanguage, isAnt) && isAnt.get().booleanValue() ||
text.endsWith("@{") && isLanguageRelevant(lastElement, file, isRelevantLanguage, isAnt) && isAnt.get().booleanValue() ||
text.endsWith("</") && isLanguageRelevant(lastElement, file, isRelevantLanguage, isAnt)) {
return true;
}
return false;
}
private static boolean isLanguageRelevant(final PsiElement element,
final PsiFile file,
final Ref<Boolean> isRelevantLanguage,
final Ref<Boolean> isAnt) {
Boolean isAntFile = isAnt.get();
if (isAntFile == null) {
isAntFile = XmlUtil.isAntFile(file);
isAnt.set(isAntFile);
}
Boolean result = isRelevantLanguage.get();
if (result == null) {
Language language = element.getLanguage();
PsiElement parent = element.getParent();
if (element instanceof PsiWhiteSpace && parent != null) {
language = parent.getLanguage();
}
result = language instanceof XMLLanguage || isAntFile.booleanValue();
isRelevantLanguage.set(result);
}
return result.booleanValue();
}
}
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