public void handleLayerEvent(IStructuralChangeEvent event) {
PositionCoordinate topLeftPosition = freezeLayer.getTopLeftPosition();
PositionCoordinate bottomRightPosition = freezeLayer.getBottomRightPosition();
Collection<StructuralDiff> columnDiffs = event.getColumnDiffs();
if (columnDiffs != null) {
int leftOffset = 0;
int rightOffset = 0;
for (StructuralDiff columnDiff : columnDiffs) {
switch (columnDiff.getDiffType()) {
case ADD:
Range afterPositionRange = columnDiff.getAfterPositionRange();
if (afterPositionRange.start < topLeftPosition.columnPosition) {
leftOffset += afterPositionRange.size();
}
if (afterPositionRange.start <= bottomRightPosition.columnPosition) {
rightOffset += afterPositionRange.size();
}
break;
case DELETE:
Range beforePositionRange = columnDiff.getBeforePositionRange();
if (beforePositionRange.start < topLeftPosition.columnPosition) {
leftOffset -=
Math.min(beforePositionRange.end, topLeftPosition.columnPosition + 1)
- beforePositionRange.start;
}
if (beforePositionRange.start <= bottomRightPosition.columnPosition) {
rightOffset -=
Math.min(beforePositionRange.end, bottomRightPosition.columnPosition + 1)
- beforePositionRange.start;
}
break;
}
}
topLeftPosition.columnPosition += leftOffset;
bottomRightPosition.columnPosition += rightOffset;
}
Collection<StructuralDiff> rowDiffs = event.getRowDiffs();
if (rowDiffs != null) {
int leftOffset = 0;
int rightOffset = 0;
for (StructuralDiff rowDiff : rowDiffs) {
switch (rowDiff.getDiffType()) {
case ADD:
Range afterPositionRange = rowDiff.getAfterPositionRange();
if (afterPositionRange.start < topLeftPosition.rowPosition) {
leftOffset += afterPositionRange.size();
}
if (afterPositionRange.start <= bottomRightPosition.rowPosition) {
rightOffset += afterPositionRange.size();
}
break;
case DELETE:
Range beforePositionRange = rowDiff.getBeforePositionRange();
if (beforePositionRange.start < topLeftPosition.rowPosition) {
leftOffset -=
Math.min(beforePositionRange.end, topLeftPosition.rowPosition + 1)
- beforePositionRange.start;
}
if (beforePositionRange.start <= bottomRightPosition.rowPosition) {
rightOffset -=
Math.min(beforePositionRange.end, bottomRightPosition.rowPosition + 1)
- beforePositionRange.start;
}
break;
}
}
topLeftPosition.rowPosition += leftOffset;
bottomRightPosition.rowPosition += rightOffset;
}
}
public PositionCoordinate executeSearch(Object valueToMatch) {
ILayer contextLayer = getContextLayer();
if (!(contextLayer instanceof SelectionLayer)) {
throw new RuntimeException(
"For the GridSearchStrategy to work it needs the selectionLayer to be passed as the contextLayer.");
}
SelectionLayer selectionLayer = (SelectionLayer) contextLayer;
PositionCoordinate selectionAnchor = selectionLayer.getSelectionAnchor();
boolean hadSelectionAnchor = true;
if (selectionAnchor.columnPosition < 0 || selectionAnchor.rowPosition < 0) {
selectionAnchor.columnPosition = 0;
selectionAnchor.rowPosition = 0;
hadSelectionAnchor = false;
}
int anchorColumnPosition = selectionAnchor.columnPosition;
int startingRowPosition;
int[] columnsToSearch = null;
final int columnCount = selectionLayer.getColumnCount();
if (searchDirection.equals(ISearchDirection.SEARCH_FORWARD)) {
int rowPosition =
hadSelectionAnchor ? selectionAnchor.rowPosition + 1 : selectionAnchor.rowPosition;
if (rowPosition > (contextLayer.getRowCount() - 1)) {
rowPosition = wrapSearch ? 0 : contextLayer.getRowCount() - 1;
}
int rowCount = selectionLayer.getRowCount();
startingRowPosition = rowPosition < rowCount ? rowPosition : 0;
if (selectionAnchor.rowPosition + 1 >= rowCount
&& anchorColumnPosition + 1 >= columnCount
&& hadSelectionAnchor) {
if (wrapSearch) {
anchorColumnPosition = 0;
} else {
return null;
}
} else if (selectionAnchor.rowPosition == rowCount - 1
&& anchorColumnPosition < columnCount - 1) {
anchorColumnPosition++;
}
columnsToSearch = getColumnsToSearchArray(columnCount, anchorColumnPosition);
} else {
int rowPosition = selectionAnchor.rowPosition - 1;
if (rowPosition < 0) {
rowPosition = wrapSearch ? contextLayer.getRowCount() - 1 : 0;
}
startingRowPosition = rowPosition > 0 ? rowPosition : 0;
if (selectionAnchor.rowPosition - 1 < 0
&& anchorColumnPosition - 1 < 0
&& hadSelectionAnchor) {
if (wrapSearch) {
anchorColumnPosition = columnCount - 1;
} else {
return null;
}
} else if (selectionAnchor.rowPosition == 0 && anchorColumnPosition > 0) {
anchorColumnPosition--;
}
columnsToSearch = getDescendingColumnsToSearchArray(anchorColumnPosition);
}
PositionCoordinate executeSearch =
searchGrid(
valueToMatch,
contextLayer,
selectionLayer,
anchorColumnPosition,
startingRowPosition,
columnsToSearch);
return executeSearch;
}