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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      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 
     17 package com.android.inputmethod.compat;
     18 
     19 import android.annotation.TargetApi;
     20 import android.graphics.Outline;
     21 import android.inputmethodservice.InputMethodService;
     22 import android.os.Build;
     23 import android.view.View;
     24 import android.view.ViewOutlineProvider;
     25 
     26 import com.android.inputmethod.compat.ViewOutlineProviderCompatUtils.InsetsUpdater;
     27 
     28 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     29 class ViewOutlineProviderCompatUtilsLXX {
     30     private ViewOutlineProviderCompatUtilsLXX() {
     31         // This utility class is not publicly instantiable.
     32     }
     33 
     34     static InsetsUpdater setInsetsOutlineProvider(final View view) {
     35         final InsetsOutlineProvider provider = new InsetsOutlineProvider(view);
     36         view.setOutlineProvider(provider);
     37         return provider;
     38     }
     39 
     40     private static class InsetsOutlineProvider extends ViewOutlineProvider
     41             implements InsetsUpdater {
     42         private final View mView;
     43         private static final int NO_DATA = -1;
     44         private int mLastVisibleTopInsets = NO_DATA;
     45 
     46         public InsetsOutlineProvider(final View view) {
     47             mView = view;
     48             view.setOutlineProvider(this);
     49         }
     50 
     51         @Override
     52         public void setInsets(final InputMethodService.Insets insets) {
     53             final int visibleTopInsets = insets.visibleTopInsets;
     54             if (mLastVisibleTopInsets != visibleTopInsets) {
     55                 mLastVisibleTopInsets = visibleTopInsets;
     56                 mView.invalidateOutline();
     57             }
     58         }
     59 
     60         @Override
     61         public void getOutline(final View view, final Outline outline) {
     62             if (mLastVisibleTopInsets == NO_DATA) {
     63                 // Call default implementation.
     64                 ViewOutlineProvider.BACKGROUND.getOutline(view, outline);
     65                 return;
     66             }
     67             // TODO: Revisit this when floating/resize keyboard is supported.
     68             outline.setRect(
     69                     view.getLeft(), mLastVisibleTopInsets, view.getRight(), view.getBottom());
     70         }
     71     }
     72 }
     73