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/*******************************************************************************
* Copyright (c) 2011 Google, 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:
* Sergey Prigogin (Google) - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.util;
import java.util.ArrayList;
import java.util.List;
import com.ibm.icu.text.BreakIterator;
import org.eclipse.cdt.ui.PreferenceConstants;
import org.eclipse.cdt.internal.ui.text.CBreakIterator;
/**
* Composes names according to a particular style. A seed name is split into
* words at non-alphanumeric characters and camel case boundaries. The resulting
* words are capitalized according to the given capitalization style, joined
* using the given delimiter and combined with the given prefix and suffix.
*/
public class NameComposer {
private static final int CAPITALIZATION_ORIGINAL = PreferenceConstants.NAME_STYLE_CAPITALIZATION_ORIGINAL;
private static final int CAPITALIZATION_UPPER_CASE = PreferenceConstants.NAME_STYLE_CAPITALIZATION_UPPER_CASE;
private static final int CAPITALIZATION_LOWER_CASE = PreferenceConstants.NAME_STYLE_CAPITALIZATION_LOWER_CASE;
private static final int CAPITALIZATION_CAMEL_CASE = PreferenceConstants.NAME_STYLE_CAPITALIZATION_CAMEL_CASE;
private static final int CAPITALIZATION_LOWER_CAMEL_CASE = PreferenceConstants.NAME_STYLE_CAPITALIZATION_LOWER_CAMEL_CASE;
private final int capitalization;
private final String wordDelimiter;
private final String prefix;
private final String suffix;
/**
* Creates a name composer for a given style.
*
* @param capitalization capitalization transformation applied to name. Possible values: <ul>
* <li>PreferenceConstants.NAME_STYLE_CAPITALIZATION_ORIGINAL,</li>
* <li>PreferenceConstants.NAME_STYLE_CAPITALIZATION_UPPER_CASE,</li>
* <li>PreferenceConstants.NAME_STYLE_CAPITALIZATION_LOWER_CASE,</li>
* <li>PreferenceConstants.NAME_STYLE_CAPITALIZATION_CAMEL_CASE,</li>
* <li>PreferenceConstants.NAME_STYLE_CAPITALIZATION_LOWER_CAMEL_CASE.</li>
* </ul>
* @param wordDelimiter delimiter inserted between words
* @param prefix prefix prepended to the name
* @param suffix suffix appended to the name
*/
public NameComposer(int capitalization, String wordDelimiter, String prefix, String suffix) {
this.capitalization = capitalization;
this.wordDelimiter = wordDelimiter;
this.prefix = prefix;
this.suffix = suffix;
}
/**
* Composes a name according to the composer's style based on a seed name.
*
* @param seedName the name used as an inspiration
* @return the composed name
*/
public String compose(String seedName) {
List<CharSequence> words = splitIntoWords(seedName);
return compose(words);
}
/**
* Composes a name according to the composer's style based on a seed words.
*
* @param words the words that that should be combined to form the name
* @return the composed name
*/
public String compose(List<CharSequence> words) {
StringBuilder buf = new StringBuilder();
buf.append(prefix);
for (int i = 0; i < words.size(); i++) {
if (i > 0) {
buf.append(wordDelimiter);
}
CharSequence word = words.get(i);
switch (capitalization) {
case CAPITALIZATION_ORIGINAL:
buf.append(word);
break;
case CAPITALIZATION_UPPER_CASE:
appendUpperCase(buf, word);
break;
case CAPITALIZATION_LOWER_CASE:
appendLowerCase(buf, word);
break;
case CAPITALIZATION_CAMEL_CASE:
appendTitleCase(buf, word);
break;
case CAPITALIZATION_LOWER_CAMEL_CASE:
if (i == 0) {
appendLowerCase(buf, word);
} else {
appendTitleCase(buf, word);
}
break;
}
}
buf.append(suffix);
return buf.toString();
}
/**
* Splits a name into words at non-alphanumeric characters and camel case boundaries.
*/
public List<CharSequence> splitIntoWords(CharSequence name) {
List<CharSequence> words = new ArrayList<CharSequence>();
CBreakIterator iterator = new CBreakIterator();
iterator.setText(name);
int end;
for (int start = iterator.first(); (end = iterator.next()) != BreakIterator.DONE; start = end) {
if (Character.isLetterOrDigit(name.charAt(start))) {
int pos = end;
while (--pos >= start && !Character.isLetterOrDigit(name.charAt(pos))) {
}
words.add(name.subSequence(start, pos + 1));
}
}
return words;
}
private void appendUpperCase(StringBuilder buf, CharSequence word) {
for (int i = 0; i < word.length(); i++) {
buf.append(Character.toUpperCase(word.charAt(i)));
}
}
private void appendLowerCase(StringBuilder buf, CharSequence word) {
for (int i = 0; i < word.length(); i++) {
buf.append(Character.toLowerCase(word.charAt(i)));
}
}
private void appendTitleCase(StringBuilder buf, CharSequence word) {
for (int i = 0; i < word.length(); i++) {
buf.append(i == 0 ?
Character.toUpperCase(word.charAt(i)) : Character.toLowerCase(word.charAt(i)));
}
}
}
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