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/*******************************************************************************
* Copyright (c) 2000, 2016 QNX Software Systems and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* QNX Software Systems - Initial API and implementation
* Red Hat Inc. - convert to use with Automake editor
*******************************************************************************/
package org.eclipse.cdt.internal.autotools.ui.editors.automake;
import org.eclipse.cdt.make.core.makefile.IMacroDefinition;
import org.eclipse.cdt.make.core.makefile.IMakefile;
import org.eclipse.cdt.make.ui.IWorkingCopyManager;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.Region;
import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.IEditorPart;
/**
* MakefileTextHover
*
*/
public class MakefileTextHover implements ITextHover {
private IEditorPart fEditor;
/**
*
*/
public MakefileTextHover(IEditorPart editor) {
fEditor = editor;
}
@Override
public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
if (hoverRegion != null) {
try {
int len = hoverRegion.getLength();
int offset = hoverRegion.getOffset();
textViewer.getDocument().get(offset, len); // check off/len validity
if (fEditor != null && len > -1) {
IWorkingCopyManager fManager = AutomakeEditorFactory.getDefault().getWorkingCopyManager();
IMakefile makefile = fManager.getWorkingCopy(fEditor.getEditorInput());
if (makefile != null) {
WordPartDetector wordPart = new WordPartDetector(textViewer, offset);
String name = wordPart.toString();
IMacroDefinition[] statements = null;
if (WordPartDetector.inMacro(textViewer, offset)) {
statements = makefile.getMacroDefinitions(name);
if (statements == null || statements.length == 0) {
statements = makefile.getBuiltinMacroDefinitions(name);
}
}
if (statements == null) {
statements = new IMacroDefinition[0];
}
// iterate over all the different categories
StringBuilder buffer = new StringBuilder();
for (int i = 0; i < statements.length; i++) {
if (i > 0) {
buffer.append("\n"); //$NON-NLS-1$
}
String infoString = statements[i].getValue().toString();
buffer.append(name);
buffer.append(" - "); //$NON-NLS-1$
buffer.append(infoString);
}
return buffer.toString();
}
}
} catch (BadLocationException e) {
}
}
return ""; //$NON-NLS-1$
}
@Override
public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
Point selection = textViewer.getSelectedRange();
if (selection.x <= offset && offset < selection.x + selection.y) {
return new Region(selection.x, selection.y);
}
return new Region(offset, 0);
}
}
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