/*
* Copyright 2003-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.nodeEditor.cells;
import jetbrains.mps.nodeEditor.cells.collections.CellContainer;
import jetbrains.mps.nodeEditor.cells.collections.Entry;
import jetbrains.mps.openapi.editor.cells.EditorCell;
import org.jetbrains.annotations.NotNull;
/**
* User: shatalin
* Date: 18/05/16
*/
class EditorCell_Collection_Container extends CellContainer {
@NotNull
private final EditorCell_Collection myCell;
EditorCell_Collection_Container(@NotNull EditorCell_Collection cell) {
myCell = cell;
}
@Override
protected Entry<EditorCell> getEntry(@NotNull EditorCell item) {
if (item instanceof Entry && item.getParent() == myCell) {
//noinspection unchecked
return (Entry<EditorCell>) item;
}
return super.getEntry(item);
}
@Override
protected Entry<EditorCell> createEntry(@NotNull EditorCell item) {
Entry<EditorCell> entry;
if (item instanceof Entry) {
if (item.getParent() == null) {
//noinspection unchecked
entry = (Entry<EditorCell>) item;
} else {
// Two cases are mixed here: item.getParent() == myCell & item.getParent() == anotherCell.
// We did that intentionally because it's hard to implement contract otherwise.
//
// super.createEntry(item) cannot be used for instances of Entry interface - subsequent
// attachParent() method call will change parent of this cell used in the condition above
// and inside getEntry() method implementation
return null;
}
} else {
entry = super.createEntry(item);
}
attachParent(item);
return entry;
}
@Override
protected Entry<EditorCell> deleteEntry(@NotNull Entry<EditorCell> entry) {
if (entry.getItem() == entry && entry.getItem().getParent() != myCell) {
// Two cases are mixed here: item.getParent() == null & item.getParent() == anotherCell.
// We did that intentionally because it's hard to implement contract otherwise.
//
// super.deleteEntry(item) cannot be used for instances of Entry interface - subsequent
// detachParent() method remove this call from the parent cell used in the condition above
// and inside getEntry() method implementation
return null;
}
detachParent(entry.getItem());
return entry.getItem() == entry ? entry : super.deleteEntry(entry);
}
private void attachParent(EditorCell cell) {
// TODO: remove cast to EditorCell_Basic
((EditorCell_Basic) cell).setParent(myCell);
myCell.getStyle().add(cell.getStyle());
if (myCell.isInTree()) {
((EditorCell_Basic) cell).onAdd();
}
}
private void detachParent(EditorCell cell) {
// TODO: remove cast to EditorCell_Basic
((EditorCell_Basic) cell).setParent(null);
myCell.getStyle().remove(cell.getStyle());
if (myCell.isInTree()) {
((EditorCell_Basic) cell).onRemove();
}
}
}