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/*******************************************************************************
* Copyright (c) 2002, 2010 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
*******************************************************************************/
package org.eclipse.cdt.make.internal.ui.text.makefile;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.cdt.make.internal.ui.MakeUIPlugin;
import org.eclipse.cdt.make.internal.ui.preferences.MakefileEditorPreferenceConstants;
import org.eclipse.cdt.make.internal.ui.text.ColorManager;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.StringConverter;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
/**
* AbstractMakefileEditorScanner
*/
public abstract class AbstractMakefileCodeScanner extends RuleBasedScanner {
private Map<String, Token> fTokenMap = new HashMap<String, Token>();
private String[] fPropertyNamesColor;
/**
* Preference keys for boolean preferences which are <code>true</code>,
* iff the corresponding token should be rendered bold.
*/
private String[] fPropertyNamesBold;
/**
* Preference keys for boolean preferences which are <code>true</code>,
* iff the corresponding token should be rendered italic.
*/
private String[] fPropertyNamesItalic;
/**
* Returns the list of preference keys which define the tokens
* used in the rules of this scanner.
*/
abstract protected String[] getTokenProperties();
/**
* Creates the list of rules controlling this scanner.
*/
abstract protected List<IRule> createRules();
/**
* Must be called after the constructor has been called.
*/
public final void initialize() {
fPropertyNamesColor = getTokenProperties();
int length = fPropertyNamesColor.length;
fPropertyNamesBold = new String[length];
fPropertyNamesItalic = new String[length];
for (int i = 0; i < length; i++) {
fPropertyNamesBold[i] = fPropertyNamesColor[i] + MakefileEditorPreferenceConstants.EDITOR_BOLD_SUFFIX;
fPropertyNamesItalic[i] = fPropertyNamesColor[i] + MakefileEditorPreferenceConstants.EDITOR_ITALIC_SUFFIX;
addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i]);
}
initializeRules();
}
private void initializeRules() {
List<IRule> rules = createRules();
if (rules != null) {
IRule[] result = new IRule[rules.size()];
rules.toArray(result);
setRules(result);
}
}
protected Token getToken(String key) {
return fTokenMap.get(key);
}
private void addToken(String colorKey, String boldKey, String italicKey) {
fTokenMap.put(colorKey, new Token(createTextAttribute(colorKey, boldKey, italicKey)));
}
private int indexOf(String property) {
if (property != null) {
int length = fPropertyNamesColor.length;
for (int i = 0; i < length; i++) {
if (property.equals(fPropertyNamesColor[i]) || property.equals(fPropertyNamesBold[i])
|| property.equals(fPropertyNamesItalic[i]))
return i;
}
}
return -1;
}
public boolean affectsBehavior(PropertyChangeEvent event) {
return indexOf(event.getProperty()) >= 0;
}
public void adaptToPreferenceChange(PropertyChangeEvent event) {
String p = event.getProperty();
int index = indexOf(p);
if (index >= 0) {
Token token = getToken(fPropertyNamesColor[index]);
if (fPropertyNamesColor[index].equals(p))
adaptToColorChange(event, token);
else if (fPropertyNamesBold[index].equals(p))
adaptToStyleChange(event, token, SWT.BOLD);
else if (fPropertyNamesItalic[index].equals(p))
adaptToStyleChange(event, token, SWT.ITALIC);
}
}
protected void adaptToColorChange(PropertyChangeEvent event, Token token) {
RGB rgb = null;
Object value = event.getNewValue();
if (value instanceof RGB) {
rgb = (RGB) value;
} else if (value instanceof String) {
rgb = StringConverter.asRGB((String) value);
}
if (rgb != null) {
TextAttribute attr = (TextAttribute) token.getData();
token.setData(
new TextAttribute(ColorManager.getDefault().getColor(rgb), attr.getBackground(), attr.getStyle()));
}
}
protected void adaptToStyleChange(PropertyChangeEvent event, Token token, int styleAttribute) {
if (token == null) {
return;
}
boolean eventValue = false;
Object value = event.getNewValue();
if (value instanceof Boolean) {
eventValue = ((Boolean) value).booleanValue();
} else if (IPreferenceStore.TRUE.equals(value)) {
eventValue = true;
}
TextAttribute attr = (TextAttribute) token.getData();
boolean activeValue = (attr.getStyle() & styleAttribute) == styleAttribute;
if (activeValue != eventValue) {
token.setData(new TextAttribute(attr.getForeground(), attr.getBackground(),
eventValue ? attr.getStyle() | styleAttribute : attr.getStyle() & ~styleAttribute));
}
}
protected TextAttribute createTextAttribute(String colorID, String boldKey, String italicKey) {
Color color = null;
if (colorID != null) {
color = MakeUIPlugin.getPreferenceColor(colorID);
}
IPreferenceStore store = MakeUIPlugin.getDefault().getPreferenceStore();
int style = store.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
if (store.getBoolean(italicKey)) {
style |= SWT.ITALIC;
}
return new TextAttribute(color, null, style);
}
}
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