Remove 'RigidWebView' which is no longer necessary

import com.fsck.k9.mailstore.AttachmentResolver;

public class MessageWebView extends RigidWebView {

public class MessageWebView extends WebView {

    public MessageWebView(Context context) {

        super(context);

/*

 * Copyright (C) 2011 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.fsck.k9.view;

import android.content.Context;

import android.os.Build;

import android.util.AttributeSet;

import timber.log.Timber;

import android.webkit.WebView;

import com.fsck.k9.Clock;

import com.fsck.k9.Throttle;

import com.fsck.k9.helper.Utility;

/**

 * A custom WebView that is robust to rapid resize events in sequence.

 *

 * This is useful for a WebView which needs to have a layout of {@code WRAP_CONTENT}, since any

 * contents with percent-based height will force the WebView to infinitely expand (or shrink).

 */

public class RigidWebView extends WebView {

    private static final boolean NO_THROTTLE = Build.VERSION.SDK_INT >= 21; //Build.VERSION_CODES.LOLLIPOP

    public RigidWebView(Context context) {

        super(context);

    }

    public RigidWebView(Context context, AttributeSet attrs) {

        super(context, attrs);

    }

    public RigidWebView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);

    }

    private static final int MIN_RESIZE_INTERVAL = 200;

    private static final int MAX_RESIZE_INTERVAL = 300;

    private final Clock mClock = Clock.INSTANCE;

    private final Throttle mThrottle = new Throttle(getClass().getName(),

            new Runnable() {

                @Override public void run() {

                    performSizeChangeDelayed();

                }

            }, Utility.getMainThreadHandler(),

            MIN_RESIZE_INTERVAL, MAX_RESIZE_INTERVAL);

    private int mRealWidth;

    private int mRealHeight;

    private boolean mIgnoreNext;

    private long mLastSizeChangeTime = -1;

    @Override

    protected void onSizeChanged(int w, int h, int ow, int oh) {

        if (NO_THROTTLE) {

            super.onSizeChanged(w, h, ow, oh);

            return;

        }

        mRealWidth = w;

        mRealHeight = h;

        long now = mClock.getTime();

        boolean recentlySized = (now - mLastSizeChangeTime < MIN_RESIZE_INTERVAL);

        // It's known that the previous resize event may cause a resize event immediately. If

        // this happens sufficiently close to the last resize event, drop it on the floor.

        if (mIgnoreNext) {

            mIgnoreNext = false;

            if (recentlySized) {

                Timber.w("Supressing size change in RigidWebView");

                return;

            }

        }

        if (recentlySized) {

            mThrottle.onEvent();

        } else {

            // It's been a sufficiently long time - just perform the resize as normal. This should

            // be the normal code path.

            performSizeChange(ow, oh);

        }

    }

    private void performSizeChange(int ow, int oh) {

        super.onSizeChanged(mRealWidth, mRealHeight, ow, oh);

        mLastSizeChangeTime = mClock.getTime();

    }

    private void performSizeChangeDelayed() {

        mIgnoreNext = true;

        performSizeChange(getWidth(), getHeight());

    }

}