/*
* Copyright (C) 2009-2011 Geometer Plus <contact@geometerplus.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.geometerplus.android.fbreader;
import java.util.HashSet;
import android.view.*;
import android.widget.*;
import org.geometerplus.zlibrary.core.tree.ZLTree;
import org.geometerplus.zlibrary.ui.androidfly.R;
abstract class ZLTreeAdapter extends BaseAdapter implements AdapterView.OnItemClickListener, View.OnCreateContextMenuListener {
private final ListView myParent;
private ZLTree<?> myTree;
private ZLTree<?>[] myItems;
private final HashSet<ZLTree<?>> myOpenItems = new HashSet<ZLTree<?>>();
protected ZLTreeAdapter(ListView parent, ZLTree<?> tree) {
myParent = parent;
myTree = tree;
myItems = new ZLTree[tree.getSize() - 1];
myOpenItems.add(tree);
parent.setAdapter(this);
parent.setOnItemClickListener(this);
parent.setOnCreateContextMenuListener(this);
}
protected final void openTree(ZLTree<?> tree) {
if (tree == null) {
return;
}
while (!myOpenItems.contains(tree)) {
myOpenItems.add(tree);
tree = tree.Parent;
}
}
public final void expandOrCollapseTree(ZLTree<?> tree) {
if (!tree.hasChildren()) {
return;
}
if (isOpen(tree)) {
myOpenItems.remove(tree);
} else {
myOpenItems.add(tree);
}
//myParent.invalidateViews();
//myParent.requestLayout();
notifyDataSetChanged();
}
public final boolean isOpen(ZLTree<?> tree) {
return myOpenItems.contains(tree);
}
public final void selectItem(ZLTree<?> tree) {
if (tree == null) {
return;
}
openTree(tree.Parent);
int index = 0;
while (true) {
ZLTree<?> parent = tree.Parent;
if (parent == null) {
break;
}
for (ZLTree<?> sibling : parent.subTrees()) {
if (sibling == tree) {
break;
}
index += getCount(sibling);
}
tree = parent;
++index;
}
if (index > 0) {
myParent.setSelection(index - 1);
}
}
private int getCount(ZLTree<?> tree) {
int count = 1;
if (isOpen(tree)) {
for (ZLTree<?> subtree : tree.subTrees()) {
count += getCount(subtree);
}
}
return count;
}
public final int getCount() {
return getCount(myTree) - 1;
}
private final int indexByPosition(int position, ZLTree<?> tree) {
if (position == 0) {
return 0;
}
--position;
int index = 1;
for (ZLTree<?> subtree : tree.subTrees()) {
int count = getCount(subtree);
if (count <= position) {
position -= count;
index += subtree.getSize();
} else {
return index + indexByPosition(position, subtree);
}
}
throw new RuntimeException("That's impossible!!!");
}
public final ZLTree<?> getItem(int position) {
final int index = indexByPosition(position + 1, myTree) - 1;
ZLTree<?> item = myItems[index];
if (item == null) {
item = myTree.getTreeByParagraphNumber(index + 1);
myItems[index] = item;
}
return item;
}
public final boolean areAllItemsEnabled() {
return true;
}
public final boolean isEnabled(int position) {
return true;
}
public final long getItemId(int position) {
return indexByPosition(position + 1, myTree);
}
protected boolean runTreeItem(ZLTree<?> tree) {
if (!tree.hasChildren()) {
return false;
}
expandOrCollapseTree(tree);
return true;
}
protected void resetTree(ZLTree<?> tree) {
myTree = tree;
myItems = new ZLTree[tree.getSize() - 1];
myOpenItems.clear();
myOpenItems.add(tree);
//myParent.invalidateViews();
//myParent.requestLayout();
notifyDataSetChanged();
}
public void resetTree() {
myItems = new ZLTree[myTree.getSize() - 1];
//myParent.invalidateViews();
//myParent.requestLayout();
notifyDataSetChanged();
}
public final void onItemClick(AdapterView<?> parent, View view, int position, long id) {
runTreeItem(getItem(position));
}
public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
}
public abstract View getView(int position, View convertView, ViewGroup parent);
protected final void setIcon(ImageView imageView, ZLTree<?> tree) {
if (tree.hasChildren()) {
if (isOpen(tree)) {
imageView.setImageResource(R.drawable.ic_list_group_open);
} else {
imageView.setImageResource(R.drawable.ic_list_group_closed);
}
} else {
imageView.setImageResource(R.drawable.ic_list_group_empty);
}
imageView.setPadding(25 * (tree.Level - 1), imageView.getPaddingTop(), 0, imageView.getPaddingBottom());
}
}