+++ /dev/null
-/*
- * (c) Copyright IBM Corp. 2000, 2001.
- * All Rights Reserved.
- */
-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;
-
-//import org.eclipse.jdt.internal.corext.Assert;
-
-/**
- * Helper class to provide String manipulation functions not available in standard JDK.
- */
-public class Strings {
-
- 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 (c != '\t' && !Character.isSpaceChar(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 (c == '\t' || Character.isSpaceChar(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 (Character.isSpaceChar(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 (Character.isSpaceChar(c)) {
- blanks++;
- if (blanks == tabWidth) {
- indents++;
- blanks= 0;
- }
- } else {
-// Assert.isTrue(false, "Line does not have requested number of indents"); //$NON-NLS-1$
- }
- 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) {
- String[] toDo= new String[lines.length];
- // find indentation common to all lines
- int minIndent= Integer.MAX_VALUE; // very large
- for (int i= 0; 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= 0; 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;
- blanks= 0;
- } else if (Character.isSpaceChar(c)) {
- blanks++;
- if (blanks == tabWidth) {
- end= i;
- blanks= 0;
- }
- } else {
- break;
- }
- }
- if (end == 0)
- return ""; //$NON-NLS-1$
- else if (end == size)
- return line;
- else
- return line.substring(0, end + 1);
- }
-}
-
git://git.phpeclipse.com / phpeclipse.git / blobdiff