/*******************************************************************************
* Copyright (c) 2006, 2015 Red Hat, Inc.
* 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:
* Red Hat Incorporated - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.autotools.ui.editors;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.cdt.autotools.core.AutotoolsPlugin;
import org.eclipse.cdt.internal.autotools.ui.preferences.AutotoolsEditorPreferenceConstants;
import org.eclipse.cdt.internal.autotools.ui.preferences.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.IToken;
import org.eclipse.jface.text.rules.RuleBasedScanner;
import org.eclipse.jface.text.rules.SingleLineRule;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WhitespaceRule;
import org.eclipse.jface.text.rules.WordRule;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
public class AutoconfMacroCodeScanner extends RuleBasedScanner {
private Map<String, IToken> fTokenMap= new HashMap<>();
private String[] fPropertyNamesColor;
private int quoteLevel;
/**
* 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;
private static String[] keywords = {
"case", "do", "done", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
"esac", "if", "elif", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
"else", "fi", "for", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
"in", "then" }; //$NON-NLS-1$ //$NON-NLS-2$
static final String[] fTokenProperties = new String[] {
ColorManager.AUTOCONF_COMMENT_COLOR,
ColorManager.AUTOCONF_KEYWORD_COLOR,
ColorManager.AUTOCONF_ACMACRO_COLOR,
ColorManager.AUTOCONF_AMMACRO_COLOR,
ColorManager.AUTOCONF_VAR_REF_COLOR,
ColorManager.AUTOCONF_VAR_SET_COLOR,
ColorManager.AUTOCONF_CODESEQ_COLOR,
ColorManager.AUTOCONF_DEFAULT_COLOR,
};
public AutoconfMacroCodeScanner() {
initialize();
IToken other= getToken(ColorManager.AUTOCONF_DEFAULT_COLOR);
IToken keyword = getToken(ColorManager.AUTOCONF_KEYWORD_COLOR);
IToken comment= getToken(ColorManager.AUTOCONF_COMMENT_COLOR);
IToken string = getToken(ColorManager.AUTOCONF_DEFAULT_COLOR);
IToken varRef = getToken(ColorManager.AUTOCONF_VAR_REF_COLOR);
IToken acmacro = getToken(ColorManager.AUTOCONF_ACMACRO_COLOR);
IToken ammacro = getToken(ColorManager.AUTOCONF_AMMACRO_COLOR);
IToken code = getToken(ColorManager.AUTOCONF_CODESEQ_COLOR);
List<IRule> rules= new ArrayList<>();
// Add rule for single line comments.
rules.add(new RestrictedEndOfLineRule("dnl", "[]", comment)); //$NON-NLS-1$
rules.add(new RestrictedEndOfLineRule("#", "[]", comment, '\\')); //$NON-NLS-1$
// Add special recursive rule for strings which allows variable
// references to be internally tokenized.
RecursiveSingleLineRule stringRule =
new RecursiveSingleLineRule("\"", "\"", string, '\\'); //$NON-NLS-1$ //$NON-NLS-2$
stringRule.addRule(new SingleLineRule("${", "}", varRef)); //$NON-NLS-1$ //$NON-NLS-2$
rules.add(stringRule);
// Add rule for variable references
rules.add(new SingleLineRule("${", "}", varRef)); //$NON-NLS-1$ //$NON-NLS-2$
// Add rule for strings
rules.add(new SingleLineRule("\"", "\"", string, '\\')); //$NON-NLS-1$ //$NON-NLS-2$
// Add rule for AC_ macros
rules.add(new AutoconfMacroRule("AC_", new AutoconfMacroWordDetector(), acmacro)); //$NON-NLS-1$
// Add rule for AM_ macros
rules.add(new AutoconfMacroRule("AM_", new AutoconfMacroWordDetector(), ammacro)); //$NON-NLS-1$
// Add rule for m4_ macros
rules.add(new AutoconfMacroRule("m4_", new AutoconfM4WordDetector(), acmacro)); //$NON-NLS-1$
// Add rule for code sequences starting with <<EOF and ending with EOF
rules.add(new InlineDataRule(code));
// Add word rule for keywords.
WordRule wordRule= new WordRule(new AutoconfWordDetector(), other);
for (int i= 0; i < keywords.length; i++)
wordRule.addWord(keywords[i], keyword);
rules.add(wordRule);
// Add word rule for identifier.
rules.add(new AutoconfIdentifierRule(other));
// Make sure we don't treat "\#" as comment start.
rules.add(new SingleLineRule("\\#", null, Token.UNDEFINED));
rules.add(new WhitespaceRule(new AutoconfWhitespaceDetector()));
IRule[] result= new IRule[rules.size()];
rules.toArray(result);
setRules(result);
}
@Override
public IToken nextToken() {
int ch = read();
if (ch == '[') {
incQuoteLevel();
return getToken(ColorManager.AUTOCONF_DEFAULT_COLOR);
} else if (ch == ']') {
decQuoteLevel();
return getToken(ColorManager.AUTOCONF_DEFAULT_COLOR);
}
unread();
return super.nextToken();
}
protected Token getToken(String key) {
return (Token) fTokenMap.get(key);
}
private void addToken(String colorKey, String boldKey, String italicKey) {
fTokenMap.put(colorKey, new Token(createTextAttribute(colorKey, boldKey, italicKey)));
}
protected String[] getTokenProperties() {
return fTokenProperties;
}
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 void incQuoteLevel() {
++quoteLevel;
}
public void decQuoteLevel() {
--quoteLevel;
}
public void resetQuoteLevel() {
quoteLevel = 0;
}
public int getQuoteLevel() {
return quoteLevel;
}
public boolean affectsBehavior(PropertyChangeEvent event) {
return indexOf(event.getProperty()) >= 0;
}
public void adaptToPreferenceChange(PropertyChangeEvent event) {
String p= event.getProperty();
int index= indexOf(p);
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= AutoconfEditor.getPreferenceColor(colorID);
}
IPreferenceStore store= AutotoolsPlugin.getDefault().getPreferenceStore();
int style= store.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
if (store.getBoolean(italicKey)) {
style |= SWT.ITALIC;
}
return new TextAttribute(color, null, style);
}
/**
* Must be called after the constructor has been called.
*/
public final void initialize() {
resetQuoteLevel();
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] + AutotoolsEditorPreferenceConstants.EDITOR_BOLD_SUFFIX;
fPropertyNamesItalic[i]= fPropertyNamesColor[i] + AutotoolsEditorPreferenceConstants.EDITOR_ITALIC_SUFFIX;
addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i]);
}
}
@Override
public void unread() {
--fOffset;
fColumn = UNDEFINED;
}
}