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/*******************************************************************************
* Copyright (c) 2017 Red Hat Inc.
*
* 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:
* Red Hat Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.codan.internal.checkers.ui.quickfix;
import org.eclipse.cdt.codan.internal.checkers.ui.CheckersUiActivator;
import org.eclipse.cdt.codan.ui.AbstractAstRewriteQuickFix;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.model.ITranslationUnit;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.FindReplaceDocumentAdapter;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
public class QuickFixAddSemicolon extends AbstractAstRewriteQuickFix {
@Override
public String getLabel() {
return QuickFixMessages.QuickFixAddSemicolon_add_semicolon;
}
@Override
public void modifyAST(IIndex index, IMarker marker) {
IASTTranslationUnit ast;
try {
ITranslationUnit tu = getTranslationUnitViaEditor(marker);
ast = tu.getAST(index, ITranslationUnit.AST_SKIP_INDEXED_HEADERS);
} catch (CoreException e) {
CheckersUiActivator.log(e);
return;
}
IASTNode astNode = null;
if (isCodanProblem(marker))
return;
// We need to back up in the file
// Start by finding the original reported position and line number
int lineNum = marker.getAttribute(IMarker.LINE_NUMBER, 0) - 1;
if (lineNum < 1) {
return;
}
IDocument document = getDocument();
int lineOffset;
int lineLength;
try {
lineOffset = document.getLineOffset(lineNum);
lineLength = document.getLineLength(lineNum);
} catch (BadLocationException e2) {
return;
}
// find the position of the reported token
int pos = getOffset(marker, getDocument());
String name = null;
try {
name = getProblemArgument(marker, 0);
} catch (Exception e) {
return;
}
if (name == null)
return;
FindReplaceDocumentAdapter dad = new FindReplaceDocumentAdapter(getDocument());
IRegion region;
try {
region = dad.find(pos, name, /* forwardSearch */true, /* caseSensitive */true, /* wholeWord */false,
/* regExSearch */false);
} catch (BadLocationException e) {
return;
}
if (region == null)
return;
// now we have the offset
int offset = region.getOffset();
IASTNode prevNode = null;
// see if there are previous nodes on same line
if (lineOffset < offset) {
astNode = getASTFirstContainedNodeFromPosition(ast, lineOffset, lineLength);
if (astNode != null) {
IASTFileLocation fileLoc = astNode.getFileLocation();
if (fileLoc == null)
return;
int length = lineLength;
while (fileLoc.getNodeOffset() < offset) {
prevNode = astNode;
astNode = getASTFirstContainedNodeFromPosition(ast,
fileLoc.getNodeOffset() + fileLoc.getNodeLength(), length);
fileLoc = astNode.getFileLocation();
if (fileLoc == null)
return;
length -= fileLoc.getNodeLength();
}
}
}
// if we didn't find the previous node on the same line, go back a line at a time and find last node on line
while (prevNode == null) {
lineNum -= 1;
if (lineNum < 0)
return; // don't bother once we have reached start of file
try {
lineOffset = document.getLineOffset(lineNum);
lineLength = document.getLineLength(lineNum);
} catch (BadLocationException e) {
return;
}
int x = lineOffset;
int leftover = lineLength;
// get a node at a time from line and keep track of last node found
while (x < lineOffset + lineLength) {
astNode = getASTFirstContainedNodeFromPosition(ast, x, leftover);
if (astNode == null)
break;
prevNode = astNode;
IASTFileLocation fileLoc = astNode.getFileLocation();
if (fileLoc == null)
break;
x += fileLoc.getNodeLength();
leftover -= fileLoc.getNodeLength();
}
}
IASTFileLocation location = prevNode.getFileLocation();
if (location == null)
return;
int replacementLoc = location.getNodeOffset() + location.getNodeLength();
// in the case of a Problem statement, it might include \n or \r\n as part
// of the node, so we must just assume the semi-colon belongs at the end of
// the line
if (replacementLoc == offset)
replacementLoc -= System.lineSeparator().length();
try {
// insert the semi-colon
document.replace(replacementLoc, 0, ";"); //$NON-NLS-1$
} catch (BadLocationException e1) {
return;
}
try {
// remove marker now that has been dealt with
marker.delete();
} catch (CoreException e) {
CheckersUiActivator.log(e);
}
}
/**
* @param ast
* @param charStart
* @param length
* @return
*/
private IASTNode getASTFirstContainedNodeFromPosition(IASTTranslationUnit ast, final int charStart,
final int length) {
IASTNode node = ast.getNodeSelector(null).findFirstContainedNode(charStart, length);
return node;
}
}
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