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/*******************************************************************************
* Copyright (C) 2012 Google Inc.
* Licensed to The Android Open Source Project.
*
* 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 com.android.mail.ui;
import android.content.Context;
import android.database.Cursor;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.TextView;
import com.android.mail.R;
import com.android.mail.providers.Folder;
import com.google.common.annotations.VisibleForTesting;
import java.util.Set;
public class HierarchicalFolderSelectorAdapter extends FolderSelectorAdapter {
private Context mContext;
@VisibleForTesting
public HierarchicalFolderSelectorAdapter(Context context, Cursor folders,
Set<String> initiallySelected, int layout) {
super(context, folders, initiallySelected, layout);
mContext = context;
}
public HierarchicalFolderSelectorAdapter(Context context, Cursor folders,
int layout, Folder excludedFolder) {
super(context, folders, layout, excludedFolder);
mContext = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final View view = super.getView(position, convertView, parent);
final FolderRow row = (FolderRow) getItem(position);
final Folder folder = row.getFolder();
final CompoundButton checkBox = (CompoundButton) view.findViewById(R.id.checkbox);
final TextView display = (TextView) view.findViewById(R.id.folder_name);
final CharSequence displayText = TextUtils.isEmpty(row.mPathName) ? folder.name
: truncateHierarchy(row.mPathName);
if (checkBox != null) {
checkBox.setText(TextUtils.isEmpty(row.mPathName) ? folder.name
: truncateHierarchy(row.mPathName), TextView.BufferType.SPANNABLE);
} else {
display.setText(displayText, TextView.BufferType.SPANNABLE);
}
return view;
}
/**
* Truncation of a hierarchy works as follows:
* 1) If there is just a folder name, return that.
* 2) If there is a single parent and a folder name, return parent/folder.
* 3) If there is > 1 but < 3 ancestors, return ancestor/ancestor2/folder
* 4) If there are > 3 ancestors, return the top most ancestor, and direct parent
* of the folder, and the folder: ancestor/.../directParent/folder
*/
@VisibleForTesting
protected SpannableStringBuilder truncateHierarchy(String hierarchy) {
if (TextUtils.isEmpty(hierarchy)) {
return null;
}
final String[] splitHierarchy = hierarchy.split("/");
// We want to keep the last part of the hierachy, as that is the name of
// the folder.
final String folderName;
final String topParentName;
final String directParentName;
final SpannableStringBuilder display = new SpannableStringBuilder();
if (splitHierarchy != null && splitHierarchy.length > 0) {
final int length = splitHierarchy.length;
if (length > 2) {
topParentName = splitHierarchy[0];
directParentName = splitHierarchy[length - 2];
folderName = splitHierarchy[length - 1];
} else if (length > 1) {
topParentName = splitHierarchy[0];
directParentName = null;
folderName = splitHierarchy[length - 1];
} else {
topParentName = null;
directParentName = null;
folderName = splitHierarchy[0];
}
if (!TextUtils.isEmpty(directParentName)) {
final int formatString;
if (length > 3) {
formatString = R.string.hierarchical_folder_parent_top_ellip;
} else {
formatString = R.string.hierarchical_folder_parent_top;
}
display.append(mContext.getResources().getString(formatString, topParentName,
directParentName));
} else if (!TextUtils.isEmpty(topParentName)) {
display.append(mContext.getResources().getString(R.string.hierarchical_folder_top,
topParentName));
}
// If there is nothing appended to display, don't try to setSpan.
if (display.length() > 0) {
display.setSpan(new ForegroundColorSpan(R.color.hierarchical_folder_parent_color),
0, display.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
display.append(folderName);
}
return display;
}
}
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