/**
* 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 the zero-based index of the table column containing the current offset. Returns -1 if
* we are not inside a table.
*/
public static int getCurrentColumnIndex(IVexWidget vexWidget) {
VEXElement row = getCurrentTableRow(vexWidget);
if (row == null) {
return -1;
}
final int offset = vexWidget.getCaretOffset();
final int[] column = new int[] {-1};
LayoutUtils.iterateTableCells(
vexWidget.getStyleSheet(),
row,
new ElementOrRangeCallback() {
private int i = 0;
public void onElement(Element child, String displayStyle) {
if (offset > child.getStartOffset() && offset <= child.getEndOffset()) {
column[0] = i;
}
i++;
}
public void onRange(VEXElement parent, int startOffset, int endOffset) {
i++;
}
});
return column[0];
}
/**
* Iterate over all rows in the table containing the caret.
*
* @param vexWidget IVexWidget to iterate over.
* @param callback Caller-provided callback that this method calls for each row in the current
* table.
*/
public static void iterateTableRows(IVexWidget vexWidget, ElementOrRangeCallback callback) {
final StyleSheet ss = vexWidget.getStyleSheet();
final VEXDocument doc = vexWidget.getDocument();
final int offset = vexWidget.getCaretOffset();
// This may or may not be a table
// In any case, it's the element that contains the top-level table
// children
VEXElement table = doc.getElementAt(offset);
while (table != null && !LayoutUtils.isTableChild(ss, table)) {
table = table.getParent();
}
while (table != null && LayoutUtils.isTableChild(ss, table)) {
table = table.getParent();
}
if (table == null || table.getParent() == null) {
return;
}
final List<Element> tableChildren = new ArrayList<Element>();
final boolean[] found = new boolean[] {false};
LayoutUtils.iterateChildrenByDisplayStyle(
ss,
LayoutUtils.TABLE_CHILD_STYLES,
table,
new ElementOrRangeCallback() {
public void onElement(Element child, String displayStyle) {
if (offset >= child.getStartOffset() && offset <= child.getEndOffset()) {
found[0] = true;
}
tableChildren.add(child);
}
public void onRange(VEXElement parent, int startOffset, int endOffset) {
if (!found[0]) {
tableChildren.clear();
}
}
});
if (!found[0]) {
return;
}
int startOffset = tableChildren.get(0).getStartOffset();
int endOffset = tableChildren.get(tableChildren.size() - 1).getEndOffset() + 1;
LayoutUtils.iterateTableRows(ss, table, startOffset, endOffset, callback);
}
/**
* Returns the innermost Element with style table-row containing the caret, or null if no such
* element exists.
*
* @param vexWidget IVexWidget to use.
*/
public static VEXElement getCurrentTableRow(IVexWidget vexWidget) {
StyleSheet ss = vexWidget.getStyleSheet();
VEXElement element = vexWidget.getCurrentElement();
while (element != null) {
if (ss.getStyles(element).getDisplay().equals(CSS.TABLE_ROW)) {
return element;
}
element = element.getParent();
}
return null;
}
/**
* Clone the table cells from the given TableRowBox to the current offset in vexWidget.
*
* @param vexWidget IVexWidget to modify.
* @param tr TableRowBox whose cells are to be cloned.
* @param moveToFirstCell TODO
*/
public static void cloneTableCells(
final IVexWidget vexWidget, final TableRowBox tr, final boolean moveToFirstCell) {
vexWidget.doWork(
new Runnable() {
public void run() {
int offset = vexWidget.getCaretOffset();
boolean firstCellIsAnonymous = false;
Box[] cells = tr.getChildren();
for (int i = 0; i < cells.length; i++) {
if (cells[i].isAnonymous()) {
vexWidget.insertText(" ");
if (i == 0) {
firstCellIsAnonymous = true;
}
} else {
vexWidget.insertElement((Element) cells[i].getElement().clone());
vexWidget.moveBy(+1);
}
}
if (moveToFirstCell) {
vexWidget.moveTo(offset + 1);
if (firstCellIsAnonymous) {
vexWidget.moveBy(-1, true);
}
}
}
});
}
/**
* Duplicate the given table row, inserting a new empty one below it. The new row contains empty
* children corresponding to the given row's children.
*
* @param vexWidget IVexWidget with which we're working
* @param tr TableRowBox to be duplicated.
*/
public static void duplicateTableRow(final IVexWidget vexWidget, final TableRowBox tr) {
vexWidget.doWork(
new Runnable() {
public void run() {
vexWidget.moveTo(tr.getEndOffset());
if (!tr.isAnonymous()) {
vexWidget.moveBy(+1); // Move past sentinel in current row
vexWidget.insertElement((Element) tr.getElement().clone());
}
cloneTableCells(vexWidget, tr, true);
}
});
}
/**
* Returns a RowColumnInfo structure containing information about the table containing the caret.
* Returns null if the caret is not currently inside a table.
*
* @param vexWidget IVexWidget to inspect.
*/
public static RowColumnInfo getRowColumnInfo(IVexWidget vexWidget) {
final boolean[] found = new boolean[1];
final RowColumnInfo[] rcInfo = new RowColumnInfo[] {new RowColumnInfo()};
final int offset = vexWidget.getCaretOffset();
rcInfo[0].cellIndex = -1;
rcInfo[0].rowIndex = -1;
iterateTableCells(
vexWidget,
new ITableCellCallback() {
private int rowColumnCount;
public void startRow(Object row, int rowIndex) {
rowColumnCount = 0;
}
public void onCell(Object row, Object cell, int rowIndex, int cellIndex) {
found[0] = true;
if (LayoutUtils.elementOrRangeContains(row, offset)) {
rcInfo[0].row = row;
rcInfo[0].rowIndex = rowIndex;
rcInfo[0].columnCount++;
if (LayoutUtils.elementOrRangeContains(cell, offset)) {
rcInfo[0].cell = cell;
rcInfo[0].cellIndex = cellIndex;
}
}
rowColumnCount++;
}
public void endRow(Object row, int rowIndex) {
rcInfo[0].rowCount++;
rcInfo[0].maxColumnCount = Math.max(rcInfo[0].maxColumnCount, rowColumnCount);
}
});
if (found[0]) {
return rcInfo[0];
} else {
return null;
}
}
public static void iterateTableCells(IVexWidget vexWidget, final ITableCellCallback callback) {
final StyleSheet ss = vexWidget.getStyleSheet();
iterateTableRows(
vexWidget,
new ElementOrRangeCallback() {
private final int[] rowIndex = {0};
public void onElement(final Element row, String displayStyle) {
callback.startRow(row, rowIndex[0]);
LayoutUtils.iterateTableCells(
ss,
row,
new ElementOrRangeCallback() {
private int cellIndex = 0;
public void onElement(Element cell, String displayStyle) {
callback.onCell(row, cell, rowIndex[0], cellIndex);
cellIndex++;
}
public void onRange(VEXElement parent, int startOffset, int endOffset) {
callback.onCell(
row, new IntRange(startOffset, endOffset), rowIndex[0], cellIndex);
cellIndex++;
}
});
callback.endRow(row, rowIndex[0]);
rowIndex[0]++;
}
public void onRange(VEXElement parent, final int startOffset, final int endOffset) {
final IntRange row = new IntRange(startOffset, endOffset);
callback.startRow(row, rowIndex[0]);
LayoutUtils.iterateTableCells(
ss,
parent,
startOffset,
endOffset,
new ElementOrRangeCallback() {
private int cellIndex = 0;
public void onElement(Element cell, String displayStyle) {
callback.onCell(row, cell, rowIndex[0], cellIndex);
cellIndex++;
}
public void onRange(VEXElement parent, int startOffset, int endOffset) {
callback.onCell(
row, new IntRange(startOffset, endOffset), rowIndex[0], cellIndex);
cellIndex++;
}
});
callback.endRow(row, rowIndex[0]);
rowIndex[0]++;
}
});
}
/**
* 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();
}
