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      1 /*
      2  * Copyright (C) 2016 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 android.inputmethodservice;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.annotation.FractionRes;
     22 import android.util.AttributeSet;
     23 import android.util.DisplayMetrics;
     24 import android.view.Gravity;
     25 import android.view.View;
     26 import android.view.ViewGroup;
     27 import android.widget.LinearLayout;
     28 
     29 /**
     30  * A special purpose layout for the editor extract view for tiny (sub 250dp) screens.
     31  * The layout is based on sizes proportional to screen pixel size to provide for the
     32  * best layout fidelity on varying pixel sizes and densities.
     33  *
     34  * @hide
     35  */
     36 public class CompactExtractEditLayout extends LinearLayout {
     37     private View mInputExtractEditText;
     38     private View mInputExtractAccessories;
     39     private View mInputExtractAction;
     40     private boolean mPerformLayoutChanges;
     41 
     42     public CompactExtractEditLayout(Context context) {
     43         super(context);
     44     }
     45 
     46     public CompactExtractEditLayout(Context context, AttributeSet attrs) {
     47         super(context, attrs);
     48     }
     49 
     50     public CompactExtractEditLayout(Context context, AttributeSet attrs, int defStyleAttr) {
     51         super(context, attrs, defStyleAttr);
     52     }
     53 
     54     @Override
     55     protected void onFinishInflate() {
     56         super.onFinishInflate();
     57         mInputExtractEditText = findViewById(com.android.internal.R.id.inputExtractEditText);
     58         mInputExtractAccessories = findViewById(com.android.internal.R.id.inputExtractAccessories);
     59         mInputExtractAction = findViewById(com.android.internal.R.id.inputExtractAction);
     60 
     61         if (mInputExtractEditText != null && mInputExtractAccessories != null
     62                 && mInputExtractAction != null) {
     63             mPerformLayoutChanges = true;
     64         }
     65     }
     66 
     67     private int applyFractionInt(@FractionRes int fraction, int whole) {
     68         return Math.round(getResources().getFraction(fraction, whole, whole));
     69     }
     70 
     71     private static void setLayoutHeight(View v, int px) {
     72         ViewGroup.LayoutParams lp = v.getLayoutParams();
     73         lp.height = px;
     74         v.setLayoutParams(lp);
     75     }
     76 
     77     private static void setLayoutMarginBottom(View v, int px) {
     78         ViewGroup.MarginLayoutParams lp = (MarginLayoutParams) v.getLayoutParams();
     79         lp.bottomMargin = px;
     80         v.setLayoutParams(lp);
     81     }
     82 
     83     private void applyProportionalLayout(int screenWidthPx, int screenHeightPx) {
     84         if (getResources().getConfiguration().isScreenRound()) {
     85             setGravity(Gravity.BOTTOM);
     86         }
     87         setLayoutHeight(this, applyFractionInt(
     88                 com.android.internal.R.fraction.input_extract_layout_height, screenHeightPx));
     89 
     90         setPadding(
     91                 applyFractionInt(com.android.internal.R.fraction.input_extract_layout_padding_left,
     92                         screenWidthPx),
     93                 0,
     94                 applyFractionInt(com.android.internal.R.fraction.input_extract_layout_padding_right,
     95                         screenWidthPx),
     96                 0);
     97 
     98         setLayoutMarginBottom(mInputExtractEditText,
     99                 applyFractionInt(com.android.internal.R.fraction.input_extract_text_margin_bottom,
    100                         screenHeightPx));
    101 
    102         setLayoutMarginBottom(mInputExtractAccessories,
    103                 applyFractionInt(com.android.internal.R.fraction.input_extract_action_margin_bottom,
    104                         screenHeightPx));
    105     }
    106 
    107     @Override
    108     protected void onAttachedToWindow() {
    109         super.onAttachedToWindow();
    110         if (mPerformLayoutChanges) {
    111             Resources res = getResources();
    112             DisplayMetrics dm = res.getDisplayMetrics();
    113             int heightPixels = dm.heightPixels;
    114             int widthPixels = dm.widthPixels;
    115             applyProportionalLayout(widthPixels, heightPixels);
    116         }
    117     }
    118 }
    119