271 lines
8.5 KiB
Java
271 lines
8.5 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.ui.widget;
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import android.content.Context;
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import android.database.Cursor;
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import android.os.Bundle;
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import android.os.Parcelable;
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import android.support.annotation.NonNull;
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import android.support.annotation.StringRes;
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import android.support.v4.app.FragmentActivity;
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import android.support.v4.app.LoaderManager;
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import android.support.v4.content.Loader;
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import android.support.v7.widget.AppCompatSpinner;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.AdapterView;
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import android.widget.BaseAdapter;
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import android.widget.SpinnerAdapter;
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import android.widget.TextView;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.R;
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import org.sufficientlysecure.keychain.provider.KeychainContract;
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import org.sufficientlysecure.keychain.ui.adapter.KeyAdapter;
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import org.sufficientlysecure.keychain.ui.adapter.KeyAdapter.KeyItem;
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/**
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* Use AppCompatSpinner from AppCompat lib instead of Spinner. Fixes white dropdown icon.
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* Related: http://stackoverflow.com/a/27713090
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*/
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public abstract class KeySpinner extends AppCompatSpinner implements
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LoaderManager.LoaderCallbacks<Cursor> {
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public static final String ARG_SUPER_STATE = "super_state";
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public static final String ARG_KEY_ID = "key_id";
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public interface OnKeyChangedListener {
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void onKeyChanged(long masterKeyId);
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}
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protected long mPreSelectedKeyId = Constants.key.none;
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protected SelectKeyAdapter mAdapter = new SelectKeyAdapter();
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protected OnKeyChangedListener mListener;
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// this shall note collide with other loaders inside the activity
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protected int LOADER_ID = 2343;
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public KeySpinner(Context context) {
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super(context);
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initView();
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}
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public KeySpinner(Context context, AttributeSet attrs) {
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super(context, attrs);
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initView();
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}
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public KeySpinner(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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initView();
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}
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private void initView() {
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setAdapter(mAdapter);
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super.setOnItemSelectedListener(new OnItemSelectedListener() {
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@Override
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public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
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if (mListener != null) {
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long keyId = getSelectedKeyId(getItemAtPosition(position));
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mListener.onKeyChanged(keyId);
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}
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}
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@Override
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public void onNothingSelected(AdapterView<?> parent) {
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if (mListener != null) {
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mListener.onKeyChanged(Constants.key.none);
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}
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}
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});
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}
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@Override
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public void setOnItemSelectedListener(OnItemSelectedListener listener) {
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throw new UnsupportedOperationException();
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}
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public void setOnKeyChangedListener(OnKeyChangedListener listener) {
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mListener = listener;
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}
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@Override
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protected void onAttachedToWindow() {
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super.onAttachedToWindow();
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reload();
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}
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public void reload() {
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if (getContext() instanceof FragmentActivity) {
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((FragmentActivity) getContext()).getSupportLoaderManager().restartLoader(LOADER_ID, null, this);
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} else {
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// ignore, this happens during preview! we use fragmentactivities everywhere either way
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}
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}
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@Override
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public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
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if (loader.getId() == LOADER_ID) {
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mAdapter.swapCursor(data);
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}
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}
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@Override
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public void onLoaderReset(Loader<Cursor> loader) {
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if (loader.getId() == LOADER_ID) {
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mAdapter.swapCursor(null);
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}
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}
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public long getSelectedKeyId() {
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Object item = getSelectedItem();
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return getSelectedKeyId(item);
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}
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public long getSelectedKeyId(Object item) {
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if (item instanceof KeyItem) {
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return ((KeyItem) item).mKeyId;
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}
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return Constants.key.none;
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}
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public void setPreSelectedKeyId(long selectedKeyId) {
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mPreSelectedKeyId = selectedKeyId;
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}
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protected class SelectKeyAdapter extends BaseAdapter implements SpinnerAdapter {
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private KeyAdapter inner;
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private int mIndexMasterKeyId;
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public SelectKeyAdapter() {
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inner = new KeyAdapter(getContext(), null, 0) {
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@Override
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public boolean isEnabled(Cursor cursor) {
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return KeySpinner.this.isItemEnabled(cursor);
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}
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};
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}
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public Cursor swapCursor(Cursor newCursor) {
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if (newCursor == null) return inner.swapCursor(null);
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mIndexMasterKeyId = newCursor.getColumnIndex(KeychainContract.KeyRings.MASTER_KEY_ID);
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Cursor oldCursor = inner.swapCursor(newCursor);
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// pre-select key if mPreSelectedKeyId is given
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if (mPreSelectedKeyId != Constants.key.none && newCursor.moveToFirst()) {
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do {
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if (newCursor.getLong(mIndexMasterKeyId) == mPreSelectedKeyId) {
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setSelection(newCursor.getPosition() +1);
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}
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} while (newCursor.moveToNext());
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}
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return oldCursor;
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}
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@Override
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public int getCount() {
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return inner.getCount() +1;
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}
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@Override
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public KeyItem getItem(int position) {
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if (position == 0) {
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return null;
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}
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return inner.getItem(position -1);
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}
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@Override
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public long getItemId(int position) {
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if (position == 0) {
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return Constants.key.none;
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}
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return inner.getItemId(position -1);
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}
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@Override
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public View getView(int position, View convertView, ViewGroup parent) {
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// Unfortunately, SpinnerAdapter does not support multiple view
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// types. For this reason, we throw away convertViews of a bad
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// type. This is sort of a hack, but since the number of elements
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// we deal with in KeySpinners is usually very small (number of
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// secret keys), this is the easiest solution. (I'm sorry.)
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if (convertView != null) {
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// This assumes that the inner view has non-null tags on its views!
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boolean isWrongType = (convertView.getTag() == null) != (position == 0);
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if (isWrongType) {
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convertView = null;
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}
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}
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if (position > 0) {
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return inner.getView(position -1, convertView, parent);
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}
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View view = convertView != null ? convertView :
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LayoutInflater.from(getContext()).inflate(
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R.layout.keyspinner_item_none, parent, false);
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((TextView) view.findViewById(R.id.keyspinner_key_name)).setText(getNoneString());
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return view;
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}
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}
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boolean isItemEnabled(Cursor cursor) {
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return true;
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}
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@Override
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public void onRestoreInstanceState(Parcelable state) {
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Bundle bundle = (Bundle) state;
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mPreSelectedKeyId = bundle.getLong(ARG_KEY_ID);
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// restore super state
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super.onRestoreInstanceState(bundle.getParcelable(ARG_SUPER_STATE));
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}
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@NonNull
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@Override
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public Parcelable onSaveInstanceState() {
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Bundle bundle = new Bundle();
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// save super state
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bundle.putParcelable(ARG_SUPER_STATE, super.onSaveInstanceState());
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bundle.putLong(ARG_KEY_ID, getSelectedKeyId());
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return bundle;
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}
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public @StringRes int getNoneString() {
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return R.string.cert_none;
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}
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}
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