/**
* Returns the start offset of the next sibling of the parent element. Returns -1 if there is no
* previous sibling in the parent.
*
* @param vexWidget VexWidget to use.
*/
public static int getPreviousSiblingStart(IVexWidget vexWidget) {
int startOffset;
if (vexWidget.hasSelection()) {
startOffset = vexWidget.getSelectionStart();
} else {
Box box =
vexWidget.findInnermostBox(
new IBoxFilter() {
public boolean matches(Box box) {
return box instanceof BlockBox && box.getElement() != null;
}
});
if (box.getElement() == vexWidget.getDocument().getRootElement()) {
return -1;
}
startOffset = box.getElement().getStartOffset();
}
int previousSiblingStart = -1;
VEXElement parent = vexWidget.getDocument().getElementAt(startOffset);
List<VEXNode> children = parent.getChildNodes();
for (VEXNode child : children) {
if (startOffset == child.getStartOffset()) {
break;
}
previousSiblingStart = child.getStartOffset();
}
return previousSiblingStart;
}
/**
* Returns an array of the selected block boxes. Text nodes between boxes are not returned. If the
* selection does not enclose any block boxes, returns an empty array.
*
* @param vexWidget VexWidget to use.
*/
public static BlockBox[] getSelectedBlockBoxes(final IVexWidget vexWidget) {
if (!vexWidget.hasSelection()) {
return new BlockBox[0];
}
Box parent =
vexWidget.findInnermostBox(
new IBoxFilter() {
public boolean matches(Box box) {
System.out.println("Matching " + box);
return box instanceof BlockBox
&& box.getStartOffset() <= vexWidget.getSelectionStart()
&& box.getEndOffset() >= vexWidget.getSelectionEnd();
}
});
System.out.println("Matched " + parent);
List<BlockBox> blockList = new ArrayList<BlockBox>();
Box[] children = parent.getChildren();
System.out.println("Parent has " + children.length + " children");
for (Box child : children) {
if (child instanceof BlockBox
&& child.getStartOffset() >= vexWidget.getSelectionStart()
&& child.getEndOffset() <= vexWidget.getSelectionEnd()) {
System.out.println(" adding " + child);
blockList.add((BlockBox) child);
} else {
System.out.println(" skipping " + child);
}
}
return blockList.toArray(new BlockBox[blockList.size()]);
}
/**
* Returns true if the given element or range is at least partially selected.
*
* @param vexWidget IVexWidget being tested.
* @param elementOrRange Element or IntRange being tested.
*/
public static boolean elementOrRangeIsPartiallySelected(
IVexWidget vexWidget, Object elementOrRange) {
IntRange range = getInnerRange(elementOrRange);
return range.getEnd() >= vexWidget.getSelectionStart()
&& range.getStart() <= vexWidget.getSelectionEnd();
}