com.facebook.react.views.view.ReactViewBackgroundManager.java Source code

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Here is the source code for com.facebook.react.views.view.ReactViewBackgroundManager.java

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// Copyright (c) Facebook, Inc. and its affiliates.

// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.

package com.facebook.react.views.view;

import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.support.v4.view.ViewCompat;
import android.view.View;
import javax.annotation.Nullable;

/** Class that manages the background for views and borders. */
public class ReactViewBackgroundManager {

    private @Nullable ReactViewBackgroundDrawable mReactBackgroundDrawable;
    private View mView;

    public ReactViewBackgroundManager(View view) {
        this.mView = view;
    }

    private ReactViewBackgroundDrawable getOrCreateReactViewBackground() {
        if (mReactBackgroundDrawable == null) {
            mReactBackgroundDrawable = new ReactViewBackgroundDrawable(mView.getContext());
            Drawable backgroundDrawable = mView.getBackground();
            ViewCompat.setBackground(mView, null); // required so that drawable callback is cleared before we add the
            // drawable back as a part of LayerDrawable
            if (backgroundDrawable == null) {
                ViewCompat.setBackground(mView, mReactBackgroundDrawable);
            } else {
                LayerDrawable layerDrawable = new LayerDrawable(
                        new Drawable[] { mReactBackgroundDrawable, backgroundDrawable });
                ViewCompat.setBackground(mView, layerDrawable);
            }
        }
        return mReactBackgroundDrawable;
    }

    public void setBackgroundColor(int color) {
        if (color == Color.TRANSPARENT && mReactBackgroundDrawable == null) {
            // don't do anything, no need to allocate ReactBackgroundDrawable for transparent background
        } else {
            getOrCreateReactViewBackground().setColor(color);
        }
    }

    public void setBorderWidth(int position, float width) {
        getOrCreateReactViewBackground().setBorderWidth(position, width);
    }

    public void setBorderColor(int position, float color, float alpha) {
        getOrCreateReactViewBackground().setBorderColor(position, color, alpha);
    }

    public void setBorderRadius(float borderRadius) {
        getOrCreateReactViewBackground().setRadius(borderRadius);
    }

    public void setBorderRadius(float borderRadius, int position) {
        getOrCreateReactViewBackground().setRadius(borderRadius, position);
    }

    public void setBorderStyle(@Nullable String style) {
        getOrCreateReactViewBackground().setBorderStyle(style);
    }
}