com.facebook.react.views.image.ImageResizeMode.java Source code

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Here is the source code for com.facebook.react.views.image.ImageResizeMode.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.image;

import android.graphics.Shader;
import androidx.annotation.Nullable;
import com.facebook.drawee.drawable.ScalingUtils;
import com.facebook.react.bridge.JSApplicationIllegalArgumentException;

/** Converts JS resize modes into Android-specific scale type. */
public class ImageResizeMode {

    /**
     * Converts JS resize modes into {@code ScalingUtils.ScaleType}. See {@code ImageResizeMode.js}.
     */
    public static ScalingUtils.ScaleType toScaleType(@Nullable String resizeModeValue) {
        if ("contain".equals(resizeModeValue)) {
            return ScalingUtils.ScaleType.FIT_CENTER;
        }
        if ("cover".equals(resizeModeValue)) {
            return ScalingUtils.ScaleType.CENTER_CROP;
        }
        if ("stretch".equals(resizeModeValue)) {
            return ScalingUtils.ScaleType.FIT_XY;
        }
        if ("center".equals(resizeModeValue)) {
            return ScalingUtils.ScaleType.CENTER_INSIDE;
        }
        if ("repeat".equals(resizeModeValue)) {
            // Handled via a combination of ScaleType and TileMode
            return ScaleTypeStartInside.INSTANCE;
        }
        if (resizeModeValue == null) {
            // Use the default. Never use null.
            return defaultValue();
        }
        throw new JSApplicationIllegalArgumentException("Invalid resize mode: '" + resizeModeValue + "'");
    }

    /** Converts JS resize modes into {@code Shader.TileMode}. See {@code ImageResizeMode.js}. */
    public static Shader.TileMode toTileMode(@Nullable String resizeModeValue) {
        if ("contain".equals(resizeModeValue) || "cover".equals(resizeModeValue)
                || "stretch".equals(resizeModeValue) || "center".equals(resizeModeValue)) {
            return Shader.TileMode.CLAMP;
        }
        if ("repeat".equals(resizeModeValue)) {
            // Handled via a combination of ScaleType and TileMode
            return Shader.TileMode.REPEAT;
        }
        if (resizeModeValue == null) {
            // Use the default. Never use null.
            return defaultTileMode();
        }
        throw new JSApplicationIllegalArgumentException("Invalid resize mode: '" + resizeModeValue + "'");
    }

    /** This is the default as per web and iOS. We want to be consistent across platforms. */
    public static ScalingUtils.ScaleType defaultValue() {
        return ScalingUtils.ScaleType.CENTER_CROP;
    }

    public static Shader.TileMode defaultTileMode() {
        return Shader.TileMode.CLAMP;
    }
}