Example usage for com.google.gwt.dom.client Range setStart

Introduction

In this page you can find the example usage for com.google.gwt.dom.client Range setStart.

Prototype

public final native void setStart(Node node, int startOffset) ;

Source Link

Document

Sets the start position of a Range.

Usage

From source file:org.rstudio.core.client.dom.impl.DomUtilsStandardImpl.java

License:Open Source License

public void setSelectionOffsets(Element container, int start, int end) {
    NodeRelativePosition startp = NodeRelativePosition.toPosition(container, start);
    NodeRelativePosition endp = NodeRelativePosition.toPosition(container, end);

    Document doc = container.getOwnerDocument();
    Range rng = Range.create(doc);
    rng.setStart(startp.node, startp.offset);
    rng.setEnd(endp.node, endp.offset);/*from w ww .  j  av  a  2 s.co  m*/
    Selection.get(NativeWindow.get(doc)).setRange(rng);

}

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From source file:org.xwiki.gwt.dom.client.DOMUtils.java

License:Open Source License

/**
 * Computes the longest text range included in the specified range. By text range we understand any range that
 * starts and ends in a text node. The end points of a text range can be in different text nodes.
 * //w w  w  .j  a v a2s  .  co  m
 * @param range any range
 * @return the longest text range included in the given range.
 */
public Range getTextRange(Range range) {
    Range textRange = range.cloneRange();
    Node firstLeaf = getFirstLeaf(range);
    if (firstLeaf != null) {
        Node lastLeaf = getLastLeaf(range);
        // Find the first text node in the range and start the range there.
        while (firstLeaf != lastLeaf && firstLeaf.getNodeType() != Node.TEXT_NODE) {
            firstLeaf = getNextLeaf(firstLeaf);
        }
        if (firstLeaf.getNodeType() == Node.TEXT_NODE && firstLeaf != textRange.getStartContainer()) {
            textRange.setStart(firstLeaf, 0);
        }
        // Find the last text node in the range and end the range there.
        while (lastLeaf != firstLeaf && lastLeaf.getNodeType() != Node.TEXT_NODE) {
            lastLeaf = getPreviousLeaf(lastLeaf);
        }
        if (lastLeaf.getNodeType() == Node.TEXT_NODE && lastLeaf != textRange.getEndContainer()) {
            textRange.setEnd(lastLeaf, lastLeaf.getNodeValue().length());
        }
    }
    return textRange;
}

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From source file:org.xwiki.gwt.dom.client.DOMUtils.java

License:Open Source License

/**
 * Computes the maximal <strong>sub-range</strong> of the given range that satisfies the following two conditions:
 * <ul>//from   w w w  .ja  v  a 2 s  . c  o m
 * <li>the start point is before a <strong>leaf</strong> element node that can't have child nodes (e.g. an image) or
 * inside a leaf node at position 0 (e.g. an empty span or a text node)</li>
 * <li>the end point is after a leaf element node that can't have child nodes (e.g. an image) or inside a leaf node
 * at the end (e.g. inside an empty span or at the end of a text node)</li>
 * </ul>
 * . If no such sub-range exists (because the given range doesn't wrap any leaf node and none of its end points
 * satisfies the corresponding condition) then the given range is returned unmodified.
 * 
 * @param range a DOM range
 * @return the maximal sub-range that selects the same content as the given range
 */
public Range shrinkRange(Range range) {
    if (range == null || range.isCollapsed()) {
        return range;
    }

    // Find the start and end points that satisfy the conditions.
    Range start = getShrunkenRangeStart(range);
    Range end = getShrunkenRangeEnd(range);

    // If at least one of the end points moved and the range is still valid.
    if ((start != range || end != range) && start.compareBoundaryPoints(RangeCompare.END_TO_START, end) <= 0) {
        Range result = range.cloneRange();
        result.setStart(start.getEndContainer(), start.getEndOffset());
        result.setEnd(end.getStartContainer(), end.getStartOffset());
        return result;
    }
    return range;
}

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From source file:org.xwiki.gwt.dom.client.DOMUtils.java

License:Open Source License

/**
 * Utility method to get the end point of the shrunken range (obtained with {@link #shrinkRange(Range)}).
 * /*w  ww .ja v  a  2s  .c om*/
 * @param range a DOM range
 * @return the end point of the range returned by {@link #shrinkRange(Range)}
 * @see #shrinkRange(Range)
 */
private Range getShrunkenRangeEnd(Range range) {
    Node endContainer = range.getEndContainer();
    if (endContainer.hasChildNodes()) {
        if (range.getEndOffset() > 0) {
            // After a child node of an element.
            endContainer = getLastLeaf(endContainer.getChild(range.getEndOffset() - 1));
        } else {
            // Before the first child of an element.
            endContainer = getPreviousLeaf(endContainer);
        }
    } else if (range.getEndOffset() == 0 && getLength(endContainer) > 0) {
        // At the start of a non-empty text node.
        endContainer = getPreviousLeaf(endContainer);
    }

    if (endContainer != null) {
        int endOffset = getLength(endContainer);
        if (endContainer.getNodeType() == Node.ELEMENT_NODE && !canHaveChildren(endContainer)) {
            endOffset = getNodeIndex(endContainer) + 1;
            endContainer = endContainer.getParentNode();
        }

        // Return a new range only if we managed to move the end.
        if (endContainer != range.getEndContainer()) {
            Range end = range.cloneRange();
            end.setStart(endContainer, endOffset);
            end.collapse(true);
            return end;
        }
    }

    return range;
}

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