The Tor Browser: mobile/android/thirdparty/com/squareup/picasso/DeferredRequestCreator.java@fc2d59ddac77

     1 /*

     2  * Copyright (C) 2013 Square, Inc.

     3  *

     4  * Licensed under the Apache License, Version 2.0 (the "License");

     5  * you may not use this file except in compliance with the License.

     6  * You may obtain a copy of the License at

     7  *

     8  *      http://www.apache.org/licenses/LICENSE-2.0

     9  *

    10  * Unless required by applicable law or agreed to in writing, software

    11  * distributed under the License is distributed on an "AS IS" BASIS,

    12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    13  * See the License for the specific language governing permissions and

    14  * limitations under the License.

    15  */

    16 package com.squareup.picasso;

    18 import android.view.ViewTreeObserver;

    19 import android.widget.ImageView;

    20 import java.lang.ref.WeakReference;

    22 class DeferredRequestCreator implements ViewTreeObserver.OnPreDrawListener {

    24   final RequestCreator creator;

    25   final WeakReference<ImageView> target;

    26   Callback callback;

    28   DeferredRequestCreator(RequestCreator creator, ImageView target, Callback callback) {

    29     this.creator = creator;

    30     this.target = new WeakReference<ImageView>(target);

    31     this.callback = callback;

    32     target.getViewTreeObserver().addOnPreDrawListener(this);

    33   }

    35   @Override public boolean onPreDraw() {

    36     ImageView target = this.target.get();

    37     if (target == null) {

    38       return true;

    39     }

    40     ViewTreeObserver vto = target.getViewTreeObserver();

    41     if (!vto.isAlive()) {

    42       return true;

    43     }

    45     int width = target.getMeasuredWidth();

    46     int height = target.getMeasuredHeight();

    48     if (width <= 0 || height <= 0) {

    49       return true;

    50     }

    52     vto.removeOnPreDrawListener(this);

    54     this.creator.unfit().resize(width, height).into(target, callback);

    55     return true;

    56   }

    58   void cancel() {

    59     callback = null;

    60     ImageView target = this.target.get();

    61     if (target == null) {

    62       return;

    63     }

    64     ViewTreeObserver vto = target.getViewTreeObserver();

    65     if (!vto.isAlive()) {

    66       return;

    67     }

    68     vto.removeOnPreDrawListener(this);

    69   }

    70 }

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