/*
* RegexUtil.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.core.client;
import org.rstudio.core.client.regex.Pattern;
// We do lazy initialization of all the regex singleton strings here
public class RegexUtil
{
public static final String letter()
{
if (LETTER == null)
LETTER = constructLetter();
return LETTER;
}
public static final String wordCharacter()
{
if (WORD_CHARACTER == null)
WORD_CHARACTER = constructWordCharacter();
return WORD_CHARACTER;
}
public static boolean isSyntacticRIdentifier(String identifier)
{
if (SYNTACTIC_R_IDENTIFIER == null)
SYNTACTIC_R_IDENTIFIER = constructSyntacticRIdentifierRegex();
return identifier.matches(SYNTACTIC_R_IDENTIFIER);
}
private static final native String constructLetter() /*-{
var unicode = $wnd.require("ace/unicode");
return unicode.packages.L;
}-*/;
private static final native String constructWordCharacter() /*-{
var unicode = $wnd.require("ace/unicode");
return unicode.packages.L +
unicode.packages.N;
}-*/;
private static final String constructSyntacticRIdentifierRegex()
{
return
"[" + letter() + ".]" +
"[" + wordCharacter() + "._]*";
}
private static String WORD_CHARACTER = null;
private static String LETTER = null;
private static String SYNTACTIC_R_IDENTIFIER = null;
public static final Pattern RE_RMARKDOWN_CHUNK_BEGIN =
Pattern.create("^\\s*```\\{(.*?)\\}\\s*$", "");
public static final Pattern RE_RMARKDOWN_CHUNK_END =
Pattern.create("^\\s*```\\s*$", "");
public static final Pattern RE_RHTML_CHUNK_BEGIN =
Pattern.create("^\\s*<!-{2,}\\s*(.*?)\\s*$", "");
public static final Pattern RE_RHTML_CHUNK_END =
Pattern.create("end\\.rcode\\s*-{2,}\\>", "");
public static final Pattern RE_SWEAVE_CHUNK_BEGIN =
Pattern.create("^\\s*\\<\\<(.*?)\\>\\>=\\s*$", "");
public static final Pattern RE_SWEAVE_CHUNK_END =
Pattern.create("^\\s*@\\s*$", "");
}