--- /dev/null
+package net.sourceforge.phpdt.internal.ui.text;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.util.Iterator;
+
+import net.sourceforge.phpdt.internal.ui.PHPUIMessages;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+
+import org.eclipse.jface.text.DefaultInformationControl;
+import org.eclipse.jface.text.Region;
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.swt.custom.StyleRange;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.widgets.Display;
+
+
+
+
+public class HTMLTextPresenter implements DefaultInformationControl.IInformationPresenter {
+
+ private static final String LINE_DELIM= System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$
+
+ private int fCounter;
+ private boolean fEnforceUpperLineLimit;
+
+ public HTMLTextPresenter(boolean enforceUpperLineLimit) {
+ super();
+ fEnforceUpperLineLimit= enforceUpperLineLimit;
+ }
+
+ public HTMLTextPresenter() {
+ this(true);
+ }
+
+ protected Reader createReader(String hoverInfo, TextPresentation presentation) {
+ return new HTML2TextReader(new StringReader(hoverInfo), presentation);
+ }
+
+ protected void adaptTextPresentation(TextPresentation presentation, int offset, int insertLength) {
+
+ int yoursStart= offset;
+ int yoursEnd= offset + insertLength -1;
+ yoursEnd= Math.max(yoursStart, yoursEnd);
+
+ Iterator e= presentation.getAllStyleRangeIterator();
+ while (e.hasNext()) {
+
+ StyleRange range= (StyleRange) e.next();
+
+ int myStart= range.start;
+ int myEnd= range.start + range.length -1;
+ myEnd= Math.max(myStart, myEnd);
+
+ if (myEnd < yoursStart)
+ continue;
+
+ if (myStart < yoursStart)
+ range.length += insertLength;
+ else
+ range.start += insertLength;
+ }
+ }
+
+ private void append(StringBuffer buffer, String string, TextPresentation presentation) {
+
+ int length= string.length();
+ buffer.append(string);
+
+ if (presentation != null)
+ adaptTextPresentation(presentation, fCounter, length);
+
+ fCounter += length;
+ }
+
+ private String getIndent(String line) {
+ int length= line.length();
+
+ int i= 0;
+ while (i < length && Character.isWhitespace(line.charAt(i))) ++i;
+
+ return (i == length ? line : line.substring(0, i)) + " "; //$NON-NLS-1$
+ }
+
+ /*
+ * @see IHoverInformationPresenter#updatePresentation(Display display, String, TextPresentation, int, int)
+ */
+ public String updatePresentation(Display display, String hoverInfo, TextPresentation presentation, int maxWidth, int maxHeight) {
+
+ if (hoverInfo == null)
+ return null;
+
+ GC gc= new GC(display);
+ try {
+
+ StringBuffer buffer= new StringBuffer();
+ int maxNumberOfLines= Math.round(maxHeight / gc.getFontMetrics().getHeight());
+
+ fCounter= 0;
+ LineBreakingReader reader= new LineBreakingReader(createReader(hoverInfo, presentation), gc, maxWidth);
+
+ boolean lastLineFormatted= false;
+ String lastLineIndent= null;
+
+ String line=reader.readLine();
+ boolean lineFormatted= reader.isFormattedLine();
+ boolean firstLineProcessed= false;
+
+ while (line != null) {
+
+ if (fEnforceUpperLineLimit && maxNumberOfLines <= 0)
+ break;
+
+ if (firstLineProcessed) {
+ if (!lastLineFormatted)
+ append(buffer, LINE_DELIM, null);
+ else {
+ append(buffer, LINE_DELIM, presentation);
+ if (lastLineIndent != null)
+ append(buffer, lastLineIndent, presentation);
+ }
+ }
+
+ append(buffer, line, null);
+ firstLineProcessed= true;
+
+ lastLineFormatted= lineFormatted;
+ if (!lineFormatted)
+ lastLineIndent= null;
+ else if (lastLineIndent == null)
+ lastLineIndent= getIndent(line);
+
+ line= reader.readLine();
+ lineFormatted= reader.isFormattedLine();
+
+ maxNumberOfLines--;
+ }
+
+ if (line != null) {
+ append(buffer, LINE_DELIM, lineFormatted ? presentation : null);
+ append(buffer, PHPUIMessages.getString("HTMLTextPresenter.ellipsis"), presentation); //$NON-NLS-1$
+ }
+
+ return trim(buffer, presentation);
+
+ } catch (IOException e) {
+
+ PHPeclipsePlugin.log(e);
+ return null;
+
+ } finally {
+ gc.dispose();
+ }
+ }
+
+ private String trim(StringBuffer buffer, TextPresentation presentation) {
+
+ int length= buffer.length();
+
+ int end= length -1;
+ while (end >= 0 && Character.isWhitespace(buffer.charAt(end)))
+ -- end;
+
+ if (end == -1)
+ return ""; //$NON-NLS-1$
+
+ if (end < length -1)
+ buffer.delete(end + 1, length);
+ else
+ end= length;
+
+ int start= 0;
+ while (start < end && Character.isWhitespace(buffer.charAt(start)))
+ ++ start;
+
+ buffer.delete(0, start);
+ presentation.setResultWindow(new Region(start, buffer.length()));
+ return buffer.toString();
+ }
+}
+
git://secure.phpeclipse.com / phpeclipse.git / blobdiff