Examples with IRegion org.eclipse.jface.text.IRegion used on opensource projects

Example 21 with IRegion

use of org.eclipse.jface.text.IRegion in project che by eclipse.

the class IndentUtil method getCurrentIndent.

/**
	 * Returns the indentation of the line <code>line</code> in <code>document</code>.
	 * The returned string may contain pairs of leading slashes that are considered
	 * part of the indentation. The space before the asterix in a javadoc-like
	 * comment is not considered part of the indentation.
	 *
	 * @param document the document
	 * @param line the line
	 * @return the indentation of <code>line</code> in <code>document</code>
	 * @throws BadLocationException if the document is changed concurrently
	 */
private static String getCurrentIndent(IDocument document, int line) throws BadLocationException {
    IRegion region = document.getLineInformation(line);
    int from = region.getOffset();
    int endOffset = region.getOffset() + region.getLength();
    // go behind line comments
    int to = from;
    while (to < endOffset - 2 && document.get(to, 2).equals(SLASHES)) to += 2;
    while (to < endOffset) {
        char ch = document.getChar(to);
        if (!Character.isWhitespace(ch))
            break;
        to++;
    }
    // don't count the space before javadoc like, asterix-style comment lines
    if (to > from && to < endOffset - 1 && document.get(to - 1, 2).equals(" *")) {
        //$NON-NLS-1$
        String type = TextUtilities.getContentType(document, IJavaPartitions.JAVA_PARTITIONING, to, true);
        if (type.equals(IJavaPartitions.JAVA_DOC) || type.equals(IJavaPartitions.JAVA_MULTI_LINE_COMMENT))
            to--;
    }
    return document.get(from, to - from);
}

Example 22 with IRegion

use of org.eclipse.jface.text.IRegion in project che by eclipse.

the class IndentUtil method cutIndent.

/**
	 * Cuts the visual equivalent of <code>toDelete</code> characters out of the
	 * indentation of line <code>line</code> in <code>document</code>. Leaves
	 * leading comment signs alone.
	 *
	 * @param document the document
	 * @param line the line
	 * @param toDelete the number of space equivalents to delete.
	 * @throws BadLocationException on concurrent document modification
	 */
private static void cutIndent(IDocument document, int line, int toDelete, int tabSize, boolean[] commentLines, int relative) throws BadLocationException {
    IRegion region = document.getLineInformation(line);
    int from = region.getOffset();
    int endOffset = region.getOffset() + region.getLength();
    // go behind line comments
    while (from < endOffset - 2 && document.get(from, 2).equals(SLASHES)) from += 2;
    int to = from;
    while (toDelete > 0 && to < endOffset) {
        char ch = document.getChar(to);
        if (!Character.isWhitespace(ch))
            break;
        toDelete -= computeVisualLength(ch, tabSize);
        if (toDelete >= 0)
            to++;
        else
            break;
    }
    if (endOffset > to + 1 && document.get(to, 2).equals(SLASHES))
        commentLines[relative] = true;
    document.replace(from, to - from, null);
}

Example 23 with IRegion

use of org.eclipse.jface.text.IRegion in project che by eclipse.

the class JavaIndenter method getLeadingWhitespace.

/**
	 * Returns the indentation of the line at <code>offset</code> as a
	 * <code>StringBuffer</code>. If the offset is not valid, the empty string
	 * is returned.
	 *
	 * @param offset the offset in the document
	 * @return the indentation (leading whitespace) of the line in which
	 * 		   <code>offset</code> is located
	 */
private StringBuffer getLeadingWhitespace(int offset) {
    StringBuffer indent = new StringBuffer();
    try {
        IRegion line = fDocument.getLineInformationOfOffset(offset);
        int lineOffset = line.getOffset();
        int nonWS = fScanner.findNonWhitespaceForwardInAnyPartition(lineOffset, lineOffset + line.getLength());
        indent.append(fDocument.get(lineOffset, nonWS - lineOffset));
        return indent;
    } catch (BadLocationException e) {
        return indent;
    }
}

Example 24 with IRegion

use of org.eclipse.jface.text.IRegion in project che by eclipse.

the class TextChange method getPreviewContent.

/**
	 * Returns a preview of the text change clipped to a specific region.
	 * The preview is created by applying the text edits managed by the
	 * given array of {@link TextEditChangeGroup text edit change groups}.
	 * The region is determined as follows:
	 * <ul>
	 *   <li>if <code>expandRegionToFullLine</code> is <code>false</code>
	 *       then the parameter <code>region</code> determines the clipping.
	 *   </li>
	 *   <li>if <code>expandRegionToFullLine</code> is <code>true</code>
	 *       then the region determined by the parameter <code>region</code>
	 *       is extended to cover full lines.
	 *   </li>
	 *   <li>if <code>surroundingLines</code> &gt; 0 then the given number
	 *       of surrounding lines is added. The value of <code>surroundingLines
	 *       </code> is only considered if <code>expandRegionToFullLine</code>
	 *       is <code>true</code>
	 *   </li>
	 * </ul>
	 *
	 * @param changeGroups a set of change groups for which a preview is to be
	 *  generated
	 * @param region the starting region for the clipping
	 * @param expandRegionToFullLine if <code>true</code> is passed the region
	 *  is extended to cover full lines
	 * @param surroundingLines the number of surrounding lines to be added to
	 *  the clipping region. Is only considered if <code>expandRegionToFullLine
	 *  </code> is <code>true</code>
	 * @param pm a progress monitor to report progress or <code>null</code>
	 *  if no progress reporting is desired
	 *
	 * @return the current content of the text change clipped to a region
	 *  determined by the given parameters.
	 *
	 * @throws CoreException if an exception occurs while generating the preview
	 *
	 * @see #getCurrentContent(IRegion, boolean, int, IProgressMonitor)
	 *
	 * @since 3.2
	 */
public String getPreviewContent(TextEditBasedChangeGroup[] changeGroups, IRegion region, boolean expandRegionToFullLine, int surroundingLines, IProgressMonitor pm) throws CoreException {
    IRegion currentRegion = getRegion(changeGroups);
    Assert.isTrue(region.getOffset() <= currentRegion.getOffset() && currentRegion.getOffset() + currentRegion.getLength() <= region.getOffset() + region.getLength());
    // Make sure that all edits in the change groups are rooted under the edit the text change stand for.
    TextEdit root = getEdit();
    //$NON-NLS-1$
    Assert.isNotNull(root, "No root edit");
    for (int c = 0; c < changeGroups.length; c++) {
        TextEditBasedChangeGroup group = changeGroups[c];
        TextEdit[] edits = group.getTextEdits();
        for (int e = 0; e < edits.length; e++) {
        // TODO: enable once following bug is fixed
        // https://bugs.eclipse.org/bugs/show_bug.cgi?id=130909
        // Assert.isTrue(root == edits[e].getRoot(), "Wrong root edit"); //$NON-NLS-1$
        }
    }
    PreviewAndRegion result = getPreviewDocument(changeGroups, pm);
    int delta;
    if (result.region == null) {
        // all edits were delete edits so no new region
        delta = -currentRegion.getLength();
    } else {
        delta = result.region.getLength() - currentRegion.getLength();
    }
    return getContent(result.document, new Region(region.getOffset(), region.getLength() + delta), expandRegionToFullLine, surroundingLines);
}

Example 25 with IRegion

use of org.eclipse.jface.text.IRegion in project che by eclipse.

the class TextEditBasedChange method getContent.

String getContent(IDocument document, IRegion region, boolean expandRegionToFullLine, int surroundingLines) throws CoreException {
    try {
        if (expandRegionToFullLine) {
            int startLine = Math.max(document.getLineOfOffset(region.getOffset()) - surroundingLines, 0);
            int endLine;
            if (region.getLength() == 0) {
                // or else spurious changes show up that look like deletes from the source
                if (surroundingLines == 0) {
                    //$NON-NLS-1$
                    return "";
                }
                endLine = Math.min(document.getLineOfOffset(region.getOffset()) + surroundingLines - 1, document.getNumberOfLines() - 1);
            } else {
                endLine = Math.min(document.getLineOfOffset(region.getOffset() + region.getLength() - 1) + surroundingLines, document.getNumberOfLines() - 1);
            }
            int offset = document.getLineInformation(startLine).getOffset();
            IRegion endLineRegion = document.getLineInformation(endLine);
            int length = endLineRegion.getOffset() + endLineRegion.getLength() - offset;
            return document.get(offset, length);
        } else {
            return document.get(region.getOffset(), region.getLength());
        }
    } catch (BadLocationException e) {
        throw Changes.asCoreException(e);
    }
}