X-Git-Url: http://secure.phpeclipse.com diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/util/StringMatcher.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/util/StringMatcher.java deleted file mode 100644 index 756f28e..0000000 --- a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/util/StringMatcher.java +++ /dev/null @@ -1,440 +0,0 @@ -package net.sourceforge.phpdt.internal.ui.util; - -import java.util.Vector; - -/** - * A string pattern matcher, suppporting * and ? wildcards. - */ -public class StringMatcher { - protected String fPattern; - - protected int fLength; // pattern length - - protected boolean fIgnoreWildCards; - - protected boolean fIgnoreCase; - - protected boolean fHasLeadingStar; - - protected boolean fHasTrailingStar; - - protected String fSegments[]; // the given pattern is split into * - // separated segments - - /* boundary value beyond which we don't need to search in the text */ - protected int fBound = 0; - - protected static final char fSingleWildCard = '\u0000'; - - public static class Position { - int start; // inclusive - - int end; // exclusive - - public Position(int start, int end) { - this.start = start; - this.end = end; - } - - public int getStart() { - return start; - } - - public int getEnd() { - return end; - } - } - - /** - * StringMatcher constructor takes in a String object that is a simple - * pattern which may contain �*� for 0 and many characters and �?� for - * exactly one character. - * - * Literal '*' and '?' characters must be escaped in the pattern e.g., "\*" - * means literal "*", etc. - * - * Escaping any other character (including the escape character itself), - * just results in that character in the pattern. e.g., "\a" means "a" and - * "\\" means "\" - * - * If invoking the StringMatcher with string literals in Java, don't forget - * escape characters are represented by "\\". - * - * @param pattern - * the pattern to match text against - * @param ignoreCase - * if true, case is ignored - * @param ignoreWildCards - * if true, wild cards and their escape sequences are ignored - * (everything is taken literally). - */ - public StringMatcher(String pattern, boolean ignoreCase, - boolean ignoreWildCards) { - if (pattern == null) - throw new IllegalArgumentException(); - fIgnoreCase = ignoreCase; - fIgnoreWildCards = ignoreWildCards; - fPattern = pattern; - fLength = pattern.length(); - - if (fIgnoreWildCards) { - parseNoWildCards(); - } else { - parseWildCards(); - } - } - - /** - * Find the first occurrence of the pattern between - * startend(exclusive). - * @param text, the String object to search in - * @param start, the starting index of the search range, inclusive - * @param end, the ending index of the search range, exclusive - * @return an StringMatcher.Position object that keeps the starting - * (inclusive) and ending positions (exclusive) of the first occurrence of the - * pattern in the specified range of the text; return null if not found or subtext - * is empty (start==end). A pair of zeros is returned if pattern is empty string - * Note that for pattern like "*abc*" with leading and trailing stars, position of "abc" - * is returned. For a pattern like"*??*" in text "abcdf", (1,3) is returned - */ - public StringMatcher.Position find(String text, int start, int end) { - if (text == null) - throw new IllegalArgumentException(); - - int tlen = text.length(); - if (start < 0) - start = 0; - if (end > tlen) - end = tlen; - if (end < 0 || start >= end) - return null; - if (fLength == 0) - return new Position(start, start); - if (fIgnoreWildCards) { - int x = posIn(text, start, end); - if (x < 0) - return null; - return new Position(x, x + fLength); - } - - int segCount = fSegments.length; - if (segCount == 0)// pattern contains only '*'(s) - return new Position(start, end); - - int curPos = start; - int matchStart = -1; - int i; - for (i = 0; i < segCount && curPos < end; ++i) { - String current = fSegments[i]; - int nextMatch = regExpPosIn(text, curPos, end, current); - if (nextMatch < 0) - return null; - if (i == 0) - matchStart = nextMatch; - curPos = nextMatch + current.length(); - } - if (i < segCount) - return null; - return new Position(matchStart, curPos); - } - - /** - * match the given text with the pattern - * - * @return true if matched eitherwise false - * @param text, a String object - */ - public boolean match(String text) { - return match(text, 0, text.length()); - } - - /** - * Given the starting (inclusive) and the ending (exclusive) positions in - * the text, determine if the given substring matches with - * aPattern - * - * @return true if the specified portion of the text matches the pattern - * @param String - * text, a String object that contains the - * substring to match - * @param int - * start marks the starting position (inclusive) of the substring - * @param int end marks the ending index (exclusive) of the substring - */ - public boolean match(String text, int start, int end) { - if (null == text) - throw new IllegalArgumentException(); - - if (start > end) - return false; - - if (fIgnoreWildCards) - return (end - start == fLength) - && fPattern.regionMatches(fIgnoreCase, 0, text, start, - fLength); - int segCount = fSegments.length; - if (segCount == 0 && (fHasLeadingStar || fHasTrailingStar)) // pattern - // contains - // only - // '*'(s) - return true; - if (start == end) - return fLength == 0; - if (fLength == 0) - return start == end; - - int tlen = text.length(); - if (start < 0) - start = 0; - if (end > tlen) - end = tlen; - - int tCurPos = start; - int bound = end - fBound; - if (bound < 0) - return false; - int i = 0; - String current = fSegments[i]; - int segLength = current.length(); - - /* process first segment */ - if (!fHasLeadingStar) { - if (!regExpRegionMatches(text, start, current, 0, segLength)) { - return false; - } else { - ++i; - tCurPos = tCurPos + segLength; - } - } - - /* process middle segments */ - while (i < segCount) { - current = fSegments[i]; - int currentMatch; - int k = current.indexOf(fSingleWildCard); - if (k < 0) { - currentMatch = textPosIn(text, tCurPos, end, current); - if (currentMatch < 0) - return false; - } else { - currentMatch = regExpPosIn(text, tCurPos, end, current); - if (currentMatch < 0) - return false; - } - tCurPos = currentMatch + current.length(); - i++; - } - - /* process final segment */ - if (!fHasTrailingStar && tCurPos != end) { - int clen = current.length(); - return regExpRegionMatches(text, end - clen, current, 0, clen); - } - return i == segCount; - } - - /** - * This method parses the given pattern into segments seperated by wildcard - * '*' characters. Since wildcards are not being used in this case, the - * pattern consists of a single segment. - */ - private void parseNoWildCards() { - fSegments = new String[1]; - fSegments[0] = fPattern; - fBound = fLength; - } - - /** - * Parses the given pattern into segments seperated by wildcard '*' - * characters. - * - * @param p, - * a String object that is a simple regular expression with �*� - * and/or �?� - */ - private void parseWildCards() { - if (fPattern.startsWith("*"))//$NON-NLS-1$ - fHasLeadingStar = true; - if (fPattern.endsWith("*")) {//$NON-NLS-1$ - /* make sure it's not an escaped wildcard */ - if (fLength > 1 && fPattern.charAt(fLength - 2) != '\\') { - fHasTrailingStar = true; - } - } - - Vector temp = new Vector(); - - int pos = 0; - StringBuffer buf = new StringBuffer(); - while (pos < fLength) { - char c = fPattern.charAt(pos++); - switch (c) { - case '\\': - if (pos >= fLength) { - buf.append(c); - } else { - char next = fPattern.charAt(pos++); - /* if it's an escape sequence */ - if (next == '*' || next == '?' || next == '\\') { - buf.append(next); - } else { - /* not an escape sequence, just insert literally */ - buf.append(c); - buf.append(next); - } - } - break; - case '*': - if (buf.length() > 0) { - /* new segment */ - temp.addElement(buf.toString()); - fBound += buf.length(); - buf.setLength(0); - } - break; - case '?': - /* append special character representing single match wildcard */ - buf.append(fSingleWildCard); - break; - default: - buf.append(c); - } - } - - /* add last buffer to segment list */ - if (buf.length() > 0) { - temp.addElement(buf.toString()); - fBound += buf.length(); - } - - fSegments = new String[temp.size()]; - temp.copyInto(fSegments); - } - - /** - * @param text, a string which contains no wildcard - * @param start, the starting index in the text for search, - * inclusive - * @param end, the stopping point of search, exclusive - * @return the starting index in the text of the pattern , or -1 if not - * found - */ - protected int posIn(String text, int start, int end) {// no wild card in - // pattern - int max = end - fLength; - - if (!fIgnoreCase) { - int i = text.indexOf(fPattern, start); - if (i == -1 || i > max) - return -1; - return i; - } - - for (int i = start; i <= max; ++i) { - if (text.regionMatches(true, i, fPattern, 0, fLength)) - return i; - } - - return -1; - } - - /** - * @param text, a simple regular expression that may only - * contain '?'(s) - * @param start, the starting index in the text for search, - * inclusive - * @param end, the stopping point of search, exclusive - * @param p, a simple regular expression that may contains '?' - * @param caseIgnored, wether the pattern is not casesensitive - * @return the starting index in the text of the pattern , or -1 if not - * found - */ - protected int regExpPosIn(String text, int start, int end, String p) { - int plen = p.length(); - - int max = end - plen; - for (int i = start; i <= max; ++i) { - if (regExpRegionMatches(text, i, p, 0, plen)) - return i; - } - return -1; - } - - /** - * - * @return boolean - * @param text, a String to match - * @param start, int that indicates the starting index of - * match, inclusive - * @param end int that indicates the ending index of match, - * exclusive - * @param p, String, String, a simple regular expression that - * may contain '?' - * @param ignoreCase, boolean indicating wether code>p - * is case sensitive - */ - protected boolean regExpRegionMatches(String text, int tStart, String p, - int pStart, int plen) { - while (plen-- > 0) { - char tchar = text.charAt(tStart++); - char pchar = p.charAt(pStart++); - - /* process wild cards */ - if (!fIgnoreWildCards) { - /* skip single wild cards */ - if (pchar == fSingleWildCard) { - continue; - } - } - if (pchar == tchar) - continue; - if (fIgnoreCase) { - if (Character.toUpperCase(tchar) == Character - .toUpperCase(pchar)) - continue; - // comparing after converting to upper case doesn't handle all - // cases; - // also compare after converting to lower case - if (Character.toLowerCase(tchar) == Character - .toLowerCase(pchar)) - continue; - } - return false; - } - return true; - } - - /** - * @param text, the string to match - * @param start, the starting index in the text for search, - * inclusive - * @param end, the stopping point of search, exclusive - * @param code>p - * , a string that has no wildcard - * @param - * ignoreCase, boolean indicating wether code>p - * is case sensitive - * @return the starting index in the text of the pattern , or -1 if not - * found - */ - protected int textPosIn(String text, int start, int end, String p) { - - int plen = p.length(); - int max = end - plen; - - if (!fIgnoreCase) { - int i = text.indexOf(p, start); - if (i == -1 || i > max) - return -1; - return i; - } - - for (int i = start; i <= max; ++i) { - if (text.regionMatches(true, i, p, 0, plen)) - return i; - } - - return -1; - } -} \ No newline at end of file