+++ /dev/null
-/**********************************************************************
-Copyright (c) 2000, 2002 IBM Corp. 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 implementation
- Klaus Hartlage - www.eclipseproject.de
-**********************************************************************/
-package net.sourceforge.phpeclipse.phpeditor.php;
-
-import org.eclipse.jface.text.BadLocationException;
-import org.eclipse.jface.text.DefaultAutoIndentStrategy;
-import org.eclipse.jface.text.DocumentCommand;
-import org.eclipse.jface.text.IDocument;
-
-/**
- * Auto indent strategy sensitive to brackets.
- */
-public class PHPAutoIndentStrategy extends DefaultAutoIndentStrategy {
-
- public PHPAutoIndentStrategy() {
- }
-
- /* (non-Javadoc)
- * Method declared on IAutoIndentStrategy
- */
- public void customizeDocumentCommand(IDocument d, DocumentCommand c) {
- if (c.length == 0 && c.text != null && endsWithDelimiter(d, c.text))
- smartIndentAfterNewLine(d, c);
- else if ("}".equals(c.text)) {
- smartInsertAfterBracket(d, c);
- }
- }
-
- /**
- * Returns whether or not the text ends with one of the given search strings.
- */
- private boolean endsWithDelimiter(IDocument d, String txt) {
-
- String[] delimiters= d.getLegalLineDelimiters();
-
- for (int i= 0; i < delimiters.length; i++) {
- if (txt.endsWith(delimiters[i]))
- return true;
- }
-
- return false;
- }
-
- /**
- * Returns the line number of the next bracket after end.
- * @returns the line number of the next matching bracket after end
- * @param document - the document being parsed
- * @param line - the line to start searching back from
- * @param end - the end position to search back from
- * @param closingBracketIncrease - the number of brackets to skip
- */
- protected int findMatchingOpenBracket(IDocument document, int line, int end, int closingBracketIncrease) throws BadLocationException {
-
- int start= document.getLineOffset(line);
- int brackcount= getBracketCount(document, start, end, false) - closingBracketIncrease;
-
- // sum up the brackets counts of each line (closing brackets count negative,
- // opening positive) until we find a line the brings the count to zero
- while (brackcount < 0) {
- line--;
- if (line < 0) {
- return -1;
- }
- start= document.getLineOffset(line);
- end= start + document.getLineLength(line) - 1;
- brackcount += getBracketCount(document, start, end, false);
- }
- return line;
- }
-
- /**
- * Returns the bracket value of a section of text. Closing brackets have a value of -1 and
- * open brackets have a value of 1.
- * @returns the line number of the next matching bracket after end
- * @param document - the document being parsed
- * @param start - the start position for the search
- * @param end - the end position for the search
- * @param ignoreCloseBrackets - whether or not to ignore closing brackets in the count
- */
- private int getBracketCount(IDocument document, int start, int end, boolean ignoreCloseBrackets) throws BadLocationException {
-
- int begin = start;
- int bracketcount= 0;
- while (begin < end) {
- char curr= document.getChar(begin);
- begin++;
- switch (curr) {
- case '/' :
- if (begin < end) {
- char next= document.getChar(begin);
- if (next == '*') {
- // a comment starts, advance to the comment end
- begin= getCommentEnd(document, begin + 1, end);
- } else if (next == '/') {
- // '//'-comment: nothing to do anymore on this line
- begin= end;
- }
- }
- break;
- case '*' :
- if (begin < end) {
- char next= document.getChar(begin);
- if (next == '/') {
- // we have been in a comment: forget what we read before
- bracketcount= 0;
- begin++;
- }
- }
- break;
- case '{' :
- bracketcount++;
- ignoreCloseBrackets= false;
- break;
- case '}' :
- if (!ignoreCloseBrackets) {
- bracketcount--;
- }
- break;
- case '"' :
- case '\'' :
- begin= getStringEnd(document, begin, end, curr);
- break;
- default :
- }
- }
- return bracketcount;
- }
-
- /**
- * Returns the end position a comment starting at pos.
- * @returns the end position a comment starting at pos
- * @param document - the document being parsed
- * @param position - the start position for the search
- * @param end - the end position for the search
- */
- private int getCommentEnd(IDocument document, int position, int end) throws BadLocationException {
- int currentPosition = position;
- while (currentPosition < end) {
- char curr= document.getChar(currentPosition);
- currentPosition++;
- if (curr == '*') {
- if (currentPosition < end && document.getChar(currentPosition) == '/') {
- return currentPosition + 1;
- }
- }
- }
- return end;
- }
-
- /**
- * Returns the String at line with the leading whitespace removed.
- * @returns the String at line with the leading whitespace removed.
- * @param document - the document being parsed
- * @param line - the line being searched
- */
- protected String getIndentOfLine(IDocument document, int line) throws BadLocationException {
- if (line > -1) {
- int start= document.getLineOffset(line);
- int end= start + document.getLineLength(line) - 1;
- int whiteend= findEndOfWhiteSpace(document, start, end);
- return document.get(start, whiteend - start);
- } else {
- return ""; //$NON-NLS-1$
- }
- }
-
- /**
- * Returns the position of the character in the document after position.
- * @returns the next location of character.
- * @param document - the document being parsed
- * @param position - the position to start searching from
- * @param end - the end of the document
- * @param character - the character you are trying to match
- */
- private int getStringEnd(IDocument document, int position, int end, char character) throws BadLocationException {
- int currentPosition = position;
- while (currentPosition < end) {
- char currentCharacter= document.getChar(currentPosition);
- currentPosition++;
- if (currentCharacter == '\\') {
- // ignore escaped characters
- currentPosition++;
- } else if (currentCharacter == character) {
- return currentPosition;
- }
- }
- return end;
- }
-
- /**
- * Set the indent of a new line based on the command provided in the supplied document.
- * @param document - the document being parsed
- * @param command - the command being performed
- */
- protected void smartIndentAfterNewLine(IDocument document, DocumentCommand command) {
-
- int docLength= document.getLength();
- if (command.offset == -1 || docLength == 0)
- return;
-
- try {
- int p= (command.offset == docLength ? command.offset - 1 : command.offset);
- int line= document.getLineOfOffset(p);
-
- StringBuffer buf= new StringBuffer(command.text);
- if (command.offset < docLength && document.getChar(command.offset) == '}') {
- int indLine= findMatchingOpenBracket(document, line, command.offset, 0);
- if (indLine == -1) {
- indLine= line;
- }
- buf.append(getIndentOfLine(document, indLine));
- } else {
- int start= document.getLineOffset(line);
- int whiteend= findEndOfWhiteSpace(document, start, command.offset);
- buf.append(document.get(start, whiteend - start));
- if (getBracketCount(document, start, command.offset, true) > 0) {
- buf.append('\t');
- }
- }
- command.text= buf.toString();
-
- } catch (BadLocationException excp) {
- System.out.println(PHPEditorMessages.getString("AutoIndent.error.bad_location_1")); //$NON-NLS-1$
- }
- }
-
- /**
- * Set the indent of a bracket based on the command provided in the supplied document.
- * @param document - the document being parsed
- * @param command - the command being performed
- */
- protected void smartInsertAfterBracket(IDocument document, DocumentCommand command) {
- if (command.offset == -1 || document.getLength() == 0)
- return;
-
- try {
- int p= (command.offset == document.getLength() ? command.offset - 1 : command.offset);
- int line= document.getLineOfOffset(p);
- int start= document.getLineOffset(line);
- int whiteend= findEndOfWhiteSpace(document, start, command.offset);
-
- // shift only when line does not contain any text up to the closing bracket
- if (whiteend == command.offset) {
- // evaluate the line with the opening bracket that matches out closing bracket
- int indLine= findMatchingOpenBracket(document, line, command.offset, 1);
- if (indLine != -1 && indLine != line) {
- // take the indent of the found line
- StringBuffer replaceText= new StringBuffer(getIndentOfLine(document, indLine));
- // add the rest of the current line including the just added close bracket
- replaceText.append(document.get(whiteend, command.offset - whiteend));
- replaceText.append(command.text);
- // modify document command
- command.length= command.offset - start;
- command.offset= start;
- command.text= replaceText.toString();
- }
- }
- } catch (BadLocationException excp) {
- System.out.println(PHPEditorMessages.getString("AutoIndent.error.bad_location_2")); //$NON-NLS-1$
- }
- }
-}
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