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/*
* Copyright 2002-2005 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 org.intellij.plugins.xpathView;
import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.fileEditor.FileEditorManager;
import com.intellij.openapi.fileTypes.StdFileTypes;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiFile;
import com.intellij.psi.xml.XmlFile;
public abstract class XPathAction extends AnAction {
protected final XPathAppComponent myComponent;
protected XPathAction() {
myComponent = XPathAppComponent.getInstance();
}
public void update(AnActionEvent event) {
super.update(event);
final Presentation presentation = event.getPresentation();
// keep track of enabled status
presentation.setEnabled(isEnabled(event, true));
// provide icon for toolbar
if (ActionPlaces.MAIN_TOOLBAR.equals(event.getPlace())) {
updateToolbar(event);
} else if (ActionPlaces.MAIN_MENU.equals(event.getPlace())) {
updateMainMenu(event);
} else if (ActionPlaces.EDITOR_POPUP.equals(event.getPlace())) {
presentation.setVisible(presentation.isEnabled());
}
}
protected void updateMainMenu(AnActionEvent event) {
final boolean b = myComponent.getConfig().SHOW_IN_MAIN_MENU;
event.getPresentation().setVisible(b && isEnabled(event, false));
}
protected void updateToolbar(AnActionEvent event) {
event.getPresentation().setVisible(myComponent.getConfig().SHOW_IN_TOOLBAR);
}
protected boolean isEnabled(AnActionEvent event, boolean checkAvailable) {
final Project project = CommonDataKeys.PROJECT.getData(event.getDataContext());
if (project == null) {
// no active project
return false;
}
Editor editor = CommonDataKeys.EDITOR.getData(event.getDataContext());
if (editor == null) {
FileEditorManager fem = FileEditorManager.getInstance(project);
editor = fem.getSelectedTextEditor();
}
if (editor == null) {
return false;
}
// do we have an xml file?
final PsiDocumentManager cem = PsiDocumentManager.getInstance(project);
final PsiFile psiFile = cem.getPsiFile(editor.getDocument());
// this is also true for DTD documents...
if (!(psiFile instanceof XmlFile)) {
return false;
} else if (psiFile.getLanguage() == StdFileTypes.DTD.getLanguage()) {
return false;
}
return !checkAvailable || isEnabledAt((XmlFile)psiFile, editor.getCaretModel().getOffset());
}
protected abstract boolean isEnabledAt(XmlFile xmlFile, int offset);
}
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