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/*******************************************************************************
* Copyright (c) 2006, 2013 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Markus Schorn - initial API and implementation
* Patrick Hofer [bug 325799]
*******************************************************************************/
package org.eclipse.cdt.internal.ui.callhierarchy;
import java.util.HashMap;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Display;
import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.cdt.ui.CElementImageDescriptor;
import org.eclipse.cdt.ui.CUIPlugin;
import org.eclipse.cdt.internal.ui.viewsupport.AppearanceAwareLabelProvider;
import org.eclipse.cdt.internal.ui.viewsupport.CElementImageProvider;
import org.eclipse.cdt.internal.ui.viewsupport.CElementLabels;
import org.eclipse.cdt.internal.ui.viewsupport.CUILabelProvider;
import org.eclipse.cdt.internal.ui.viewsupport.ImageImageDescriptor;
public class CHLabelProvider extends AppearanceAwareLabelProvider {
private final static long LABEL_OPTIONS_SIMPLE = CElementLabels.ALL_FULLY_QUALIFIED
| CElementLabels.M_PARAMETER_TYPES | CElementLabels.M_APP_RETURNTYPE | CElementLabels.F_APP_TYPE_SIGNATURE | CElementLabels.TEMPLATE_ARGUMENTS;
private final static long LABEL_OPTIONS_SHOW_FILES= LABEL_OPTIONS_SIMPLE | CElementLabels.MF_POST_FILE_QUALIFIED;
private CUILabelProvider fCLabelProvider= new CUILabelProvider(LABEL_OPTIONS_SIMPLE, CElementImageProvider.OVERLAY_ICONS);
private CHContentProvider fContentProvider;
private HashMap<String, Image> fCachedImages= new HashMap<String, Image>();
private Color fColorInactive;
public CHLabelProvider(Display display, CHContentProvider cp) {
fColorInactive= display.getSystemColor(SWT.COLOR_DARK_GRAY);
fContentProvider= cp;
}
@Override
public Image getImage(Object element) {
if (element instanceof CHNode) {
CHNode node= (CHNode) element;
Image image= null;
if (node.isInitializer()) {
ImageDescriptor desc= CElementImageProvider.getFunctionImageDescriptor();
image= CUIPlugin.getImageDescriptorRegistry().get(desc);
} else {
ICElement decl= node.getOneRepresentedDeclaration();
if (decl != null) {
image= fCLabelProvider.getImage(decl);
}
}
if (image != null) {
return decorateImage(image, node);
}
}
return super.getImage(element);
}
@Override
public String getText(Object element) {
if (element instanceof CHNode) {
CHNode node= (CHNode) element;
ICElement decl= node.getOneRepresentedDeclaration();
if (decl != null) {
String label;
if (node.isMultiDef()) {
long options= fCLabelProvider.getTextFlags();
fCLabelProvider.setTextFlags(LABEL_OPTIONS_SIMPLE);
label= fCLabelProvider.getText(decl);
fCLabelProvider.setTextFlags(options);
} else {
label= fCLabelProvider.getText(decl);
if (node.isInitializer()) {
label= addInitializerDecoration(label);
}
}
int refCount= node.getReferenceCount();
if (refCount > 1) {
label += NLS.bind(" ({0} {1})", new Integer(refCount), CHMessages.CHLabelProvider_matches); //$NON-NLS-1$
}
return decorateText(label, element);
}
}
return super.getText(element);
}
@Override
public StyledString getStyledText(Object element) {
if (element instanceof CHNode) {
CHNode node= (CHNode) element;
ICElement decl= node.getOneRepresentedDeclaration();
if (decl != null) {
StyledString label;
if (node.isMultiDef()) {
long options= fCLabelProvider.getTextFlags();
fCLabelProvider.setTextFlags(LABEL_OPTIONS_SIMPLE);
label= fCLabelProvider.getStyledText(decl);
fCLabelProvider.setTextFlags(options);
} else {
label= fCLabelProvider.getStyledText(decl);
if (node.isInitializer()) {
label= addInitializerDecoration(label);
}
}
int refCount= node.getReferenceCount();
if (refCount > 1) {
final int offset= label.length();
label.append(NLS.bind(" ({0} {1})", new Integer(refCount), CHMessages.CHLabelProvider_matches)); //$NON-NLS-1$
label.setStyle(offset, label.length() - offset, StyledString.COUNTER_STYLER);
}
String decorated= decorateText(label.getString(), element);
if (decorated != null) {
return StyledCellLabelProvider.styleDecoratedString(decorated, StyledString.DECORATIONS_STYLER, label);
}
return label;
}
}
return fCLabelProvider.getStyledText(element);
}
private String addInitializerDecoration(String label) {
int i= 0;
char[] content= label.toCharArray();
for (i = 0; i < content.length; i++) {
char c = content[i];
if (c == '-' || Character.isWhitespace(c)) {
break;
}
}
StringBuffer buf= new StringBuffer(label.length() + 10);
buf.append("{init "); //$NON-NLS-1$
buf.append(content, 0, i);
buf.append("}()"); //$NON-NLS-1$
buf.append(content, i, content.length-i);
return buf.toString();
}
private StyledString addInitializerDecoration(StyledString label) {
int i= 0;
char[] content= label.toString().toCharArray();
for (i = 0; i < content.length; i++) {
char c = content[i];
if (c == '-' || Character.isWhitespace(c)) {
break;
}
}
StyledString label2= new StyledString();
label2.append("{init "); //$NON-NLS-1$
i += label2.length();
label2.append(label);
label2.insert('}', i++);
label2.insert('(', i++);
label2.insert(')', i++);
label2.setStyle(0, i, null);
return label2;
}
@Override
public void dispose() {
fCLabelProvider.dispose();
for (Image image : fCachedImages.values()) {
image.dispose();
}
fCachedImages.clear();
super.dispose();
}
private Image decorateImage(Image image, CHNode node) {
int flags= 0;
if (node.isRecursive()) {
flags |= CElementImageDescriptor.RECURSIVE_RELATION;
} else if (fContentProvider.hasChildren(node)) {
if (fContentProvider.getComputeReferencedBy()) {
flags |= CElementImageDescriptor.REFERENCED_BY;
} else {
if (node.isMultiDef()) {
flags |= CElementImageDescriptor.RELATES_TO_MULTIPLE;
} else {
flags |= CElementImageDescriptor.RELATES_TO;
}
}
}
if (node.isReadAccess()) {
flags |= CElementImageDescriptor.READ_ACCESS;
}
if (node.isWriteAccess()) {
flags |= CElementImageDescriptor.WRITE_ACCESS;
}
String key= image.toString()+String.valueOf(flags);
Image result= fCachedImages.get(key);
if (result == null) {
ImageDescriptor desc= new CElementImageDescriptor(
new ImageImageDescriptor(image), flags, new Point(20,16));
result= desc.createImage();
fCachedImages.put(key, result);
}
return result;
}
@Override
public Color getForeground(Object element) {
if (element instanceof CHMultiDefNode) {
return fColorInactive;
}
return null;
}
public void setShowFiles(boolean show) {
fCLabelProvider.setTextFlags(show ? LABEL_OPTIONS_SHOW_FILES : LABEL_OPTIONS_SIMPLE);
}
}
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