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|  | 1 | +package com.firebase.ui.auth.util.ui; | 
|  | 2 | + | 
|  | 3 | +import android.content.Context; | 
|  | 4 | +import android.content.res.TypedArray; | 
|  | 5 | +import android.graphics.drawable.Drawable; | 
|  | 6 | +import android.os.Build; | 
|  | 7 | +import android.util.AttributeSet; | 
|  | 8 | + | 
|  | 9 | +import com.firebase.ui.auth.R; | 
|  | 10 | + | 
|  | 11 | +import androidx.annotation.RestrictTo; | 
|  | 12 | +import androidx.appcompat.content.res.AppCompatResources; | 
|  | 13 | +import androidx.appcompat.widget.AppCompatButton; | 
|  | 14 | +import androidx.core.widget.TextViewCompat; | 
|  | 15 | + | 
|  | 16 | +/** | 
|  | 17 | + * A custom button that supports using vector drawables with the {@code | 
|  | 18 | + * android:drawable[Start/End/Top/Bottom]} attribute pre-L. | 
|  | 19 | + * <p> | 
|  | 20 | + * AppCompat can only load vector drawables with srcCompat pre-L and doesn't provide a similar | 
|  | 21 | + * compatibility attribute for compound drawables. Thus, we must load compound drawables at runtime | 
|  | 22 | + * using AppCompat and inject them into the button to support pre-L devices. | 
|  | 23 | + */ | 
|  | 24 | +@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) | 
|  | 25 | +public class SupportVectorDrawablesButton extends AppCompatButton { | 
|  | 26 | +    public SupportVectorDrawablesButton(Context context) { | 
|  | 27 | +        super(context); | 
|  | 28 | +    } | 
|  | 29 | + | 
|  | 30 | +    public SupportVectorDrawablesButton(Context context, AttributeSet attrs) { | 
|  | 31 | +        super(context, attrs); | 
|  | 32 | +        initSupportVectorDrawablesAttrs(attrs); | 
|  | 33 | +    } | 
|  | 34 | + | 
|  | 35 | +    public SupportVectorDrawablesButton(Context context, AttributeSet attrs, int defStyleAttr) { | 
|  | 36 | +        super(context, attrs, defStyleAttr); | 
|  | 37 | +        initSupportVectorDrawablesAttrs(attrs); | 
|  | 38 | +    } | 
|  | 39 | + | 
|  | 40 | +    /** | 
|  | 41 | +     * Loads the compound drawables natively on L+ devices and using AppCompat pre-L. | 
|  | 42 | +     * <p> | 
|  | 43 | +     * <i>Note:</i> If we ever need a TextView with compound drawables, this same technique is | 
|  | 44 | +     * applicable. | 
|  | 45 | +     */ | 
|  | 46 | +    private void initSupportVectorDrawablesAttrs(AttributeSet attrs) { | 
|  | 47 | +        if (attrs == null) { return; } | 
|  | 48 | + | 
|  | 49 | +        TypedArray attributeArray = getContext().obtainStyledAttributes( | 
|  | 50 | +                attrs, | 
|  | 51 | +                R.styleable.SupportVectorDrawablesButton); | 
|  | 52 | + | 
|  | 53 | +        Drawable drawableStart = null; | 
|  | 54 | +        Drawable drawableEnd = null; | 
|  | 55 | +        Drawable drawableTop = null; | 
|  | 56 | +        Drawable drawableBottom = null; | 
|  | 57 | + | 
|  | 58 | +        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { | 
|  | 59 | +            drawableStart = attributeArray.getDrawable( | 
|  | 60 | +                    R.styleable.SupportVectorDrawablesButton_drawableStartCompat); | 
|  | 61 | +            drawableEnd = attributeArray.getDrawable( | 
|  | 62 | +                    R.styleable.SupportVectorDrawablesButton_drawableEndCompat); | 
|  | 63 | +            drawableTop = attributeArray.getDrawable( | 
|  | 64 | +                    R.styleable.SupportVectorDrawablesButton_drawableTopCompat); | 
|  | 65 | +            drawableBottom = attributeArray.getDrawable( | 
|  | 66 | +                    R.styleable.SupportVectorDrawablesButton_drawableBottomCompat); | 
|  | 67 | +        } else { | 
|  | 68 | +            int drawableStartId = attributeArray.getResourceId( | 
|  | 69 | +                    R.styleable.SupportVectorDrawablesButton_drawableStartCompat, -1); | 
|  | 70 | +            int drawableEndId = attributeArray.getResourceId( | 
|  | 71 | +                    R.styleable.SupportVectorDrawablesButton_drawableEndCompat, -1); | 
|  | 72 | +            int drawableTopId = attributeArray.getResourceId( | 
|  | 73 | +                    R.styleable.SupportVectorDrawablesButton_drawableTopCompat, -1); | 
|  | 74 | +            int drawableBottomId = attributeArray.getResourceId( | 
|  | 75 | +                    R.styleable.SupportVectorDrawablesButton_drawableBottomCompat, -1); | 
|  | 76 | + | 
|  | 77 | +            if (drawableStartId != -1) { | 
|  | 78 | +                drawableStart = AppCompatResources.getDrawable(getContext(), drawableStartId); | 
|  | 79 | +            } | 
|  | 80 | +            if (drawableEndId != -1) { | 
|  | 81 | +                drawableEnd = AppCompatResources.getDrawable(getContext(), drawableEndId); | 
|  | 82 | +            } | 
|  | 83 | +            if (drawableTopId != -1) { | 
|  | 84 | +                drawableTop = AppCompatResources.getDrawable(getContext(), drawableTopId); | 
|  | 85 | +            } | 
|  | 86 | +            if (drawableBottomId != -1) { | 
|  | 87 | +                drawableBottom = AppCompatResources.getDrawable(getContext(), drawableBottomId); | 
|  | 88 | +            } | 
|  | 89 | +        } | 
|  | 90 | + | 
|  | 91 | +        TextViewCompat.setCompoundDrawablesRelativeWithIntrinsicBounds( | 
|  | 92 | +                this, drawableStart, drawableTop, drawableEnd, drawableBottom); | 
|  | 93 | + | 
|  | 94 | +        attributeArray.recycle(); | 
|  | 95 | +    } | 
|  | 96 | +} | 
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