--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.corext.util;
+
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DefaultLineTracker;
+import org.eclipse.jface.text.ILineTracker;
+import org.eclipse.jface.text.IRegion;
+
+/**
+ * Helper class to provide String manipulation functions not available in standard JDK.
+ */
+public class Strings {
+
+ /**
+ * Indent char is a space char but not a line delimiters.
+ * <code>== Character.isWhitespace(ch) && ch != '\n' && ch != '\r'</code>
+ */
+ public static boolean isIndentChar(char ch) {
+ return Character.isWhitespace(ch) && !isLineDelimiterChar(ch);
+ }
+
+ /**
+ * tests if a char is lower case. Fix for 26529
+ */
+ public static boolean isLowerCase(char ch) {
+ return Character.toLowerCase(ch) == ch;
+ }
+
+ /**
+ * Line delimiter chars are '\n' and '\r'.
+ */
+ public static boolean isLineDelimiterChar(char ch) {
+ return ch == '\n' || ch == '\r';
+ }
+
+ public static String removeNewLine(String message) {
+ StringBuffer result= new StringBuffer();
+ int current= 0;
+ int index= message.indexOf('\n', 0);
+ while (index != -1) {
+ result.append(message.substring(current, index));
+ if (current < index && index != 0)
+ result.append(' ');
+ current= index + 1;
+ index= message.indexOf('\n', current);
+ }
+ result.append(message.substring(current));
+ return result.toString();
+ }
+
+ /**
+ * Converts the given string into an array of lines. The lines
+ * don't contain any line delimiter characters.
+ *
+ * @return the string converted into an array of strings. Returns <code>
+ * null</code> if the input string can't be converted in an array of lines.
+ */
+ public static String[] convertIntoLines(String input) {
+ try {
+ ILineTracker tracker= new DefaultLineTracker();
+ tracker.set(input);
+ int size= tracker.getNumberOfLines();
+ String result[]= new String[size];
+ for (int i= 0; i < size; i++) {
+ IRegion region= tracker.getLineInformation(i);
+ int offset= region.getOffset();
+ result[i]= input.substring(offset, offset + region.getLength());
+ }
+ return result;
+ } catch (BadLocationException e) {
+ return null;
+ }
+ }
+
+ /**
+ * Returns <code>true</code> if the given string only consists of
+ * white spaces according to Java. If the string is empty, <code>true
+ * </code> is returned.
+ *
+ * @return <code>true</code> if the string only consists of white
+ * spaces; otherwise <code>false</code> is returned
+ *
+ * @see java.lang.Character#isWhitespace(char)
+ */
+ public static boolean containsOnlyWhitespaces(String s) {
+ int size= s.length();
+ for (int i= 0; i < size; i++) {
+ if (!Character.isWhitespace(s.charAt(i)))
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Removes leading tabs and spaces from the given string. If the string
+ * doesn't contain any leading tabs or spaces then the string itself is
+ * returned.
+ */
+ public static String trimLeadingTabsAndSpaces(String line) {
+ int size= line.length();
+ int start= size;
+ for (int i= 0; i < size; i++) {
+ char c= line.charAt(i);
+ if (!isIndentChar(c)) {
+ start= i;
+ break;
+ }
+ }
+ if (start == 0)
+ return line;
+ else if (start == size)
+ return ""; //$NON-NLS-1$
+ else
+ return line.substring(start);
+ }
+
+ public static String trimTrailingTabsAndSpaces(String line) {
+ int size= line.length();
+ int end= size;
+ for (int i= size - 1; i >= 0; i--) {
+ char c= line.charAt(i);
+ if (isIndentChar(c)) {
+ end= i;
+ } else {
+ break;
+ }
+ }
+ if (end == size)
+ return line;
+ else if (end == 0)
+ return ""; //$NON-NLS-1$
+ else
+ return line.substring(0, end);
+ }
+
+ /**
+ * Returns the indent of the given string.
+ *
+ * @param line the text line
+ * @param tabWidth the width of the '\t' character.
+ */
+ public static int computeIndent(String line, int tabWidth) {
+ int result= 0;
+ int blanks= 0;
+ int size= line.length();
+ for (int i= 0; i < size; i++) {
+ char c= line.charAt(i);
+ if (c == '\t') {
+ result++;
+ blanks= 0;
+ } else if (isIndentChar(c)) {
+ blanks++;
+ if (blanks == tabWidth) {
+ result++;
+ blanks= 0;
+ }
+ } else {
+ return result;
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Removes the given number of idents from the line. Asserts that the given line
+ * has the requested number of indents. If <code>indentsToRemove <= 0</code>
+ * the line is returned.
+ */
+ public static String trimIndent(String line, int indentsToRemove, int tabWidth) {
+ if (line == null || indentsToRemove <= 0)
+ return line;
+
+ int start= 0;
+ int indents= 0;
+ int blanks= 0;
+ int size= line.length();
+ for (int i= 0; i < size; i++) {
+ char c= line.charAt(i);
+ if (c == '\t') {
+ indents++;
+ blanks= 0;
+ } else if (isIndentChar(c)) {
+ blanks++;
+ if (blanks == tabWidth) {
+ indents++;
+ blanks= 0;
+ }
+ } else {
+ // Assert.isTrue(false, "Line does not have requested number of indents"); //$NON-NLS-1$
+ start= i + 1;
+ break;
+ }
+ if (indents == indentsToRemove) {
+ start= i + 1;
+ break;
+ }
+ }
+ if (start == size)
+ return ""; //$NON-NLS-1$
+ else
+ return line.substring(start);
+ }
+
+ /**
+ * Removes all leading indents from the given line. If the line doesn't contain
+ * any indents the line itself is returned.
+ */
+ public static String trimIndents(String s, int tabWidth) {
+ int indent= computeIndent(s, tabWidth);
+ if (indent == 0)
+ return s;
+ return trimIndent(s, indent, tabWidth);
+ }
+
+ /**
+ * Removes the common number of indents from all lines. If a line
+ * only consists out of white space it is ignored.
+ */
+ public static void trimIndentation(String[] lines, int tabWidth) {
+ trimIndentation(lines, tabWidth, true);
+ }
+
+ /**
+ * Removes the common number of indents from all lines. If a line
+ * only consists out of white space it is ignored. If <code>
+ * considerFirstLine</code> is false the first line will be ignored.
+ */
+ public static void trimIndentation(String[] lines, int tabWidth, boolean considerFirstLine) {
+ String[] toDo= new String[lines.length];
+ // find indentation common to all lines
+ int minIndent= Integer.MAX_VALUE; // very large
+ for (int i= considerFirstLine ? 0 : 1; i < lines.length; i++) {
+ String line= lines[i];
+ if (containsOnlyWhitespaces(line))
+ continue;
+ toDo[i]= line;
+ int indent= computeIndent(line, tabWidth);
+ if (indent < minIndent) {
+ minIndent= indent;
+ }
+ }
+
+ if (minIndent > 0) {
+ // remove this indent from all lines
+ for (int i= considerFirstLine ? 0 : 1; i < toDo.length; i++) {
+ String s= toDo[i];
+ if (s != null)
+ lines[i]= trimIndent(s, minIndent, tabWidth);
+ else {
+ String line= lines[i];
+ int indent= computeIndent(line, tabWidth);
+ if (indent > minIndent)
+ lines[i]= trimIndent(line, minIndent, tabWidth);
+ else
+ lines[i]= trimLeadingTabsAndSpaces(line);
+ }
+ }
+ }
+ }
+
+ public static String getIndentString(String line, int tabWidth) {
+ int size= line.length();
+ int end= 0;
+ int blanks= 0;
+ for (int i= 0; i < size; i++) {
+ char c= line.charAt(i);
+ if (c == '\t') {
+ end= i + 1;
+ blanks= 0;
+ } else if (isIndentChar(c)) {
+ blanks++;
+ if (blanks == tabWidth) {
+ end= i + 1;
+ blanks= 0;
+ }
+ } else {
+ break;
+ }
+ }
+ if (end == 0)
+ return ""; //$NON-NLS-1$
+ else if (end == size)
+ return line;
+ else
+ return line.substring(0, end);
+ }
+
+ public static String[] removeTrailingEmptyLines(String[] sourceLines) {
+ int lastNonEmpty= findLastNonEmptyLineIndex(sourceLines);
+ String[] result= new String[lastNonEmpty + 1];
+ for (int i= 0; i < result.length; i++) {
+ result[i]= sourceLines[i];
+ }
+ return result;
+ }
+
+ private static int findLastNonEmptyLineIndex(String[] sourceLines) {
+ for (int i= sourceLines.length - 1; i >= 0; i--) {
+ if (! sourceLines[i].trim().equals(""))//$NON-NLS-1$
+ return i;
+ }
+ return -1;
+ }
+
+ /**
+ * Change the indent of, possible muti-line, code range. The current indent is removed, a new indent added.
+ * The first line of the code will not be changed. (It is considered to have no indent as it might start in
+ * the middle of a line)
+ */
+ public static String changeIndent(String code, int codeIndentLevel, int tabWidth, String newIndent, String lineDelim) {
+ try {
+ ILineTracker tracker= new DefaultLineTracker();
+ tracker.set(code);
+ int nLines= tracker.getNumberOfLines();
+ if (nLines == 1) {
+ return code;
+ }
+
+ StringBuffer buf= new StringBuffer();
+
+ for (int i= 0; i < nLines; i++) {
+ IRegion region= tracker.getLineInformation(i);
+ int start= region.getOffset();
+ int end= start + region.getLength();
+ String line= code.substring(start, end);
+
+ if (i == 0) { // no indent for first line (contained in the formatted string)
+ buf.append(line);
+ } else { // no new line after last line
+ buf.append(lineDelim);
+ buf.append(newIndent);
+ buf.append(trimIndent(line, codeIndentLevel, tabWidth));
+ }
+ }
+ return buf.toString();
+ } catch (BadLocationException e) {
+ // can not happen
+ return code;
+ }
+ }
+
+ /**
+ * Concatenate the given strings into one strings using the passed line delimiter as a
+ * delimiter. No delimiter is added to the last line.
+ */
+ public static String concatenate(String[] lines, String delimiter) {
+ StringBuffer buffer= new StringBuffer();
+ for (int i= 0; i < lines.length; i++) {
+ if (i > 0)
+ buffer.append(delimiter);
+ buffer.append(lines[i]);
+ }
+ return buffer.toString();
+ }
+
+ public static boolean equals(String s, char[] c) {
+ if (s.length() != c.length)
+ return false;
+
+ for (int i = c.length; --i >= 0;)
+ if (s.charAt(i) != c[i])
+ return false;
+ return true;
+ }
+}
+
git://git.phpeclipse.com / phpeclipse.git / commitdiff