/* 
 * Copyright 2014 OpenMarket Ltd
 * 
 * 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 org.matrix.androidsdk.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;

/**
 * The listView automatically scrolls down when its height is updated.
 * It is used to scroll the list when the keyboard is displayed
 */
public class AutoScrollDownListView extends ListView {

    private boolean mLockSelectionOnResize = false;

    public AutoScrollDownListView (Context context) {
        super(context);
    }

    public AutoScrollDownListView (Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public AutoScrollDownListView (Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) {
        super.onSizeChanged(xNew, yNew, xOld, yOld);

        if (!mLockSelectionOnResize) {
            // check if the keyboard is displayed
            // we don't want that the list scrolls to the bottom when the keyboard is hidden.
            if (yNew < yOld) {
                this.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        setSelection(getCount() - 1);
                    }
                }, 100);
            }
        }
    }

    /**
     * The listview selection is locked even if the view position is updated.
     */
    public void lockSelectionOnResize() {
        mLockSelectionOnResize = true;
    }
}

@@ -731,16 +731,56 @@
 tView;%0A%0A
+import org.matrix.androidsdk.util.Log;%0A%0A
 /**%0A * T
@@ -968,16 +968,104 @@
 stView %7B
+%0A    private static final String LOG_TAG = AutoScrollDownListView.class.getSimpleName();
 %0A%0A    pr
@@ -1136,33 +1136,32 @@
 rollDownListView
- 
 (Context context
@@ -1220,33 +1220,32 @@
 rollDownListView
- 
 (Context context
@@ -1339,17 +1339,16 @@
 ListView
- 
 (Context
@@ -2230,11 +2230,371 @@
 e;%0A    %7D
+%0A%0A    @Override%0A    protected void layoutChildren() %7B%0A        // the adapter items are added without refreshing the list (back pagination only)%0A        // to reduce the number of refresh%0A        try %7B%0A            super.layoutChildren();%0A        %7D catch (Exception e) %7B%0A            Log.e(LOG_TAG, %22## layoutChildren() failed %22 + e.getMessage());%0A        %7D%0A    %7D
 %0A%7D%0A

Fix the "messages list was modified in background and i did not refresh it in time" crash