net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/html/HTMLFormattingStrategy.java

   1 package net.sourceforge.phpeclipse.phpeditor.html;
   2
   3 import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
   4 import net.sourceforge.phpeclipse.phpeditor.PHPSourceViewerConfiguration;
   5
   6 import org.eclipse.jface.text.BadLocationException;
   7 import org.eclipse.jface.text.IDocument;
   8 import org.eclipse.jface.text.formatter.IFormattingStrategy;
   9 import org.eclipse.jface.text.source.ISourceViewer;
  10 import org.eclipse.jface.text.source.SourceViewer;
  11
  12 /**
  13  * @author chrisl
  14  *
  15  * To change this generated comment edit the template variable "typecomment":
  16  * Window>Preferences>Java>ObfuscatorIgnores.
  17  * To enable and disable the creation of type comments go to
  18  * Window>Preferences>Java>Code Generation.
  19  */
  20 public class HTMLFormattingStrategy implements IFormattingStrategy, IHTMLConstants {
  21
  22         ////////////////////////////////////////////////////////////////////////
  23
  24         private PHPSourceViewerConfiguration fConfig;
  25         private ISourceViewer fViewer;
  26         //
  27         private PHPEditor fEditor;
  28         private int fTabWidth;
  29
  30         ////////////////////////////////////////////////////////////////////////
  31
  32         public HTMLFormattingStrategy(PHPSourceViewerConfiguration cf, ISourceViewer viewer) {
  33                 fConfig = cf;
  34                 fViewer = viewer;
  35                 //
  36                 fEditor = fConfig.getEditor();
  37                 initPreferences();
  38         }
  39
  40         public void initPreferences() {
  41                 fTabWidth=fConfig.getTabWidth(fViewer);
  42         }
  43
  44         ////////////////////////////////////////////////////////////////////////
  45
  46         /**
  47          * @see IFormattingStrategy#formatterStarts(String)
  48          */
  49         public void formatterStarts(String initialIndentation) {
  50         }
  51
  52         /**
  53          * @see IFormattingStrategy#formatterStops()
  54          */
  55         public void formatterStops() {
  56         }
  57
  58         /**
  59          * @see IFormattingStrategy#format(String, boolean, String, int[])
  60          */
  61         public String format(String content, boolean isLineStart, String indentation, int[] positions) {
  62                 HTMLFormatter formatter = new HTMLFormatter(fConfig, (SourceViewer) fViewer);
  63                 IDocument doc = fViewer.getDocument();
  64                 String lineDelimiter = getLineDelimiterFor(doc);
  65                 int indent = 0;
  66                 if (indentation != null) {
  67                         indent = computeIndent(indentation, fTabWidth);
  68                 }
  69                 return formatter.format(content, indent, positions, lineDelimiter, fEditor.getEditorInput().getName());
  70         }
  71
  72         public static String getLineDelimiterFor(IDocument doc) {
  73                 String lineDelim = null;
  74                 try {
  75                         lineDelim = doc.getLineDelimiter(0);
  76                 } catch (BadLocationException e) {
  77                 }
  78                 if (lineDelim == null) {
  79                         String systemDelimiter = System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$
  80                         String[] lineDelims = doc.getLegalLineDelimiters();
  81                         for (int i = 0; i < lineDelims.length; i++) {
  82                                 if (lineDelims[i].equals(systemDelimiter)) {
  83                                         lineDelim = systemDelimiter;
  84                                         break;
  85                                 }
  86                         }
  87                         if (lineDelim == null) {
  88                                 lineDelim = lineDelims.length > 0 ? lineDelims[0] : systemDelimiter;
  89                         }
  90                 }
  91                 return lineDelim;
  92         }
  93
  94         /**
  95          * Returns the indent of the given string.
  96          *
  97          * @param line the text line
  98          * @param tabWidth the width of the '\t' character.
  99          *
 100          * @see org.eclipse.jdt.internal.corext.util.Strings.computeIndent(String,int)
 101          */
 102         public static int computeIndent(String line, int tabWidth) {
 103                 int result = 0;
 104                 int blanks = 0;
 105                 int size = line.length();
 106                 for (int i = 0; i < size; i++) {
 107                         char c = line.charAt(i);
 108                         if (c == '\t') {
 109                                 result++;
 110                                 blanks = 0;
 111                         } else if (Character.isSpaceChar(c)) {
 112                                 blanks++;
 113                                 if (blanks == tabWidth) {
 114                                         result++;
 115                                         blanks = 0;
 116                                 }
 117                         } else {
 118                                 return result;
 119                         }
 120                 }
 121                 return result;
 122         }
 123
 124         ////////////////////////////////////////////////////////////////////////
 125
 126 }