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Code Issues Wiki Activity

Fix for 192808: Source hover has problems with K&R style arguments

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This commit is contained in:
Anton Leherbauer 2007-06-15 09:58:46 +00:00
parent d94281c9ff
commit 3aace937cf
1 changed files with 54 additions and 14 deletions
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68
core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/c/hover/CSourceHover.java
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@ -47,8 +47,10 @@ import org.eclipse.ui.IEditorPart;
import org.eclipse.cdt.core.dom.IName;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
import org.eclipse.cdt.core.dom.ast.IASTFunctionDefinition;
import org.eclipse.cdt.core.dom.ast.IASTFunctionStyleMacroParameter;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorFunctionStyleMacroDefinition;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorMacroDefinition;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
@ -65,6 +67,7 @@ import org.eclipse.cdt.core.dom.ast.ITypedef;
import org.eclipse.cdt.core.dom.ast.IVariable;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateDefinition;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameter;
import org.eclipse.cdt.core.dom.ast.gnu.c.ICASTKnRFunctionDeclarator;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.model.CModelException;
import org.eclipse.cdt.core.model.ICElement;
@ -263,7 +266,6 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
mgr.connect(location, locationKind, fMonitor);
ITextFileBuffer buffer= mgr.getTextFileBuffer(location, locationKind);
try {
IRegion nameRegion= new Region(fileLocation.getNodeOffset(), fileLocation.getNodeLength());
final int nameOffset= nameRegion.getOffset();
final int sourceStart;
@ -279,17 +281,18 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
} else {
sourceStart= directiveStart;
}
sourceEnd= directiveStart + partition.getLength();
sourceEnd= directiveStart + partition.getLength();
} else {
return null;
}
} else {
// expand source range to include preceding comment, if any
sourceStart= computeSourceStart(doc, nameOffset, binding);
boolean isKnR= isKnRSource(name);
sourceStart= computeSourceStart(doc, nameOffset, binding, isKnR);
if (sourceStart == CHeuristicScanner.NOT_FOUND) {
return null;
}
sourceEnd= computeSourceEnd(doc, nameOffset + nameRegion.getLength(), binding, name.isDefinition());
sourceEnd= computeSourceEnd(doc, nameOffset + nameRegion.getLength(), binding, name.isDefinition(), isKnR);
}
String source= buffer.getDocument().get(sourceStart, sourceEnd - sourceStart);
return source;
@ -303,15 +306,37 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
return null;
}
private int computeSourceStart(IDocument doc, int nameOffset, IBinding binding) throws BadLocationException {
/**
* Determine if the name is part of a KnR function definition.
* @param name
* @return <code>true</code> if the name is part of a KnR function
*/
private boolean isKnRSource(IName name) {
if (name instanceof IASTName) {
IASTNode node= (IASTNode)name;
while (node.getParent() != null) {
if (node instanceof ICASTKnRFunctionDeclarator) {
return node.getParent() instanceof IASTFunctionDefinition;
}
node= node.getParent();
}
}
return false;
}
private int computeSourceStart(IDocument doc, int nameOffset, IBinding binding, boolean isKnR) throws BadLocationException {
int sourceStart= nameOffset;
CHeuristicScanner scanner= new CHeuristicScanner(doc);
if (binding instanceof IParameter) {
sourceStart= scanner.scanBackward(nameOffset, CHeuristicScanner.UNBOUND, new char[] { '>', '(', ',' });
if (sourceStart > 0 && doc.getChar(sourceStart) == '>') {
sourceStart= scanner.findOpeningPeer(sourceStart - 1, '<', '>');
if (sourceStart > 0) {
sourceStart= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '(', ',' });
if (isKnR) {
sourceStart= scanner.scanBackward(nameOffset, CHeuristicScanner.UNBOUND, new char[] { ')', ';' });
} else {
sourceStart= scanner.scanBackward(nameOffset, CHeuristicScanner.UNBOUND, new char[] { '>', '(', ',' });
if (sourceStart > 0 && doc.getChar(sourceStart) == '>') {
sourceStart= scanner.findOpeningPeer(sourceStart - 1, '<', '>');
if (sourceStart > 0) {
sourceStart= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '(', ',' });
}
}
}
if (sourceStart == CHeuristicScanner.NOT_FOUND) {
@ -361,13 +386,22 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
expectClosingBrace= type instanceof ICompositeType || type instanceof IEnumeration;
final int nameLine= doc.getLineOfOffset(nameOffset);
sourceStart= nameOffset;
int commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '{', '}', ';' });
int commentBound;
if (isKnR) {
commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { ')', ';' });
} else {
commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '{', '}', ';' });
}
while (expectClosingBrace && commentBound > 0 && doc.getChar(commentBound) == '}') {
int openingBrace= scanner.findOpeningPeer(commentBound - 1, '{', '}');
if (openingBrace != CHeuristicScanner.NOT_FOUND) {
sourceStart= openingBrace - 1;
}
commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '{', '}', ';' });
if (isKnR) {
commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { ')', ';' });
} else {
commentBound= scanner.scanBackward(sourceStart, CHeuristicScanner.UNBOUND, new char[] { '{', '}', ';' });
}
}
if (commentBound == CHeuristicScanner.NOT_FOUND) {
commentBound= -1; // unbound
@ -390,7 +424,7 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
return sourceStart;
}
private int computeSourceEnd(IDocument doc, int start, IBinding binding, boolean isDefinition) throws BadLocationException {
private int computeSourceEnd(IDocument doc, int start, IBinding binding, boolean isDefinition, boolean isKnR) throws BadLocationException {
int sourceEnd= start;
CHeuristicScanner scanner= new CHeuristicScanner(doc);
// expand forward to the end of the definition/declaration
@ -403,7 +437,13 @@ public class CSourceHover extends AbstractCEditorTextHover implements ITextHover
searchBrace= true;
} else if (binding instanceof IFunction && isDefinition) {
searchBrace= true;
} else if (binding instanceof IParameter || binding instanceof IEnumerator || binding instanceof ICPPTemplateParameter) {
} else if (binding instanceof IParameter) {
if (isKnR) {
searchSemi= true;
} else {
searchComma= true;
}
} else if (binding instanceof IEnumerator || binding instanceof ICPPTemplateParameter) {
searchComma= true;
} else if (binding instanceof IVariable || binding instanceof ITypedef) {
searchSemi= true;