The Tor Browser: mobile/android/base/toolbar/TabCounter.java@fc2d59ddac77

     1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 package org.mozilla.gecko.toolbar;

     8 import org.mozilla.gecko.animation.Rotate3DAnimation;

     9 import org.mozilla.gecko.R;

    10 import org.mozilla.gecko.widget.ThemedTextSwitcher;

    12 import android.content.Context;

    13 import android.os.Build;

    14 import android.view.accessibility.AccessibilityNodeInfo;

    15 import android.view.animation.Animation;

    16 import android.view.animation.AnimationSet;

    17 import android.view.animation.AlphaAnimation;

    18 import android.view.LayoutInflater;

    19 import android.view.View;

    20 import android.util.AttributeSet;

    21 import android.widget.ViewSwitcher;

    23 public class TabCounter extends ThemedTextSwitcher

    24                         implements ViewSwitcher.ViewFactory {

    26     private static final float CENTER_X = 0.5f;

    27     private static final float CENTER_Y = 1.25f;

    28     private static final int DURATION = 500;

    29     private static final float Z_DISTANCE = 200;

    31     private final AnimationSet mFlipInForward;

    32     private final AnimationSet mFlipInBackward;

    33     private final AnimationSet mFlipOutForward;

    34     private final AnimationSet mFlipOutBackward;

    35     private final LayoutInflater mInflater;

    37     private int mCount = 0;

    39     private enum FadeMode {

    40         FADE_IN,

    41         FADE_OUT

    42     }

    44     public TabCounter(Context context, AttributeSet attrs) {

    45         super(context, attrs);

    46         mInflater = LayoutInflater.from(context);

    48         mFlipInForward = createAnimation(-90, 0, FadeMode.FADE_IN, -1 * Z_DISTANCE, false);

    49         mFlipInBackward = createAnimation(90, 0, FadeMode.FADE_IN, Z_DISTANCE, false);

    50         mFlipOutForward = createAnimation(0, -90, FadeMode.FADE_OUT, -1 * Z_DISTANCE, true);

    51         mFlipOutBackward = createAnimation(0, 90, FadeMode.FADE_OUT, Z_DISTANCE, true);

    53         removeAllViews();

    54         setFactory(this);

    56         if (Build.VERSION.SDK_INT >= 16) {

    57             // This adds the TextSwitcher to the a11y node tree, where we in turn

    58             // could make it return an empty info node. If we don't do this the

    59             // TextSwitcher's child TextViews get picked up, and we don't want

    60             // that since the tabs ImageButton is already properly labeled for

    61             // accessibility.

    62             setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);

    63             setAccessibilityDelegate(new View.AccessibilityDelegate() {

    64                     @Override

    65                     public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {}

    66                 });

    67         }

    68     }

    70     void setCountWithAnimation(int count) {

    71         // Don't animate from initial state

    72         if (mCount == 0) {

    73             setCount(count);

    74             return;

    75         }

    77         if (mCount == count) {

    78             return;

    79         }

    81         if (count < mCount) {

    82             setInAnimation(mFlipInBackward);

    83             setOutAnimation(mFlipOutForward);

    84         } else {

    85             setInAnimation(mFlipInForward);

    86             setOutAnimation(mFlipOutBackward);

    87         }

    89         // Eliminate screen artifact. Set explicit In/Out animation pair order. This will always

    90         // animate pair in In->Out child order, prevent alternating use of the Out->In case.

    91         setDisplayedChild(0);

    93         // Set In value, trigger animation to Out value

    94         setCurrentText(String.valueOf(mCount));

    95         setText(String.valueOf(count));

    97         mCount = count;

    98     }

   100     void setCount(int count) {

   101         setCurrentText(String.valueOf(count));

   102         mCount = count;

   103     }

   105     // Alpha animations in editing mode cause action bar corruption on the

   106     // Nexus 7 (bug 961749). As a workaround, skip these animations in editing

   107     // mode.

   108     void onEnterEditingMode() {

   109         final int childCount = getChildCount();

   110         for (int i = 0; i < childCount; i++) {

   111             getChildAt(i).clearAnimation();

   112         }

   113     }

   115     private AnimationSet createAnimation(float startAngle, float endAngle,

   116                                          FadeMode fadeMode,

   117                                          float zEnd, boolean reverse) {

   118         final Context context = getContext();

   119         AnimationSet set = new AnimationSet(context, null);

   120         set.addAnimation(new Rotate3DAnimation(startAngle, endAngle, CENTER_X, CENTER_Y, zEnd, reverse));

   121         set.addAnimation(fadeMode == FadeMode.FADE_IN ? new AlphaAnimation(0.0f, 1.0f) :

   122                                                         new AlphaAnimation(1.0f, 0.0f));

   123         set.setDuration(DURATION);

   124         set.setInterpolator(context, android.R.anim.accelerate_interpolator);

   125         return set;

   126     }

   128     @Override

   129     public View makeView() {

   130         return mInflater.inflate(R.layout.tabs_counter, null);

   131     }

   133 }

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