android/sdk/src/main/java/org/apache/weex/ui/animation/TransformParser.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.weex.ui.animation;

import android.animation.PropertyValuesHolder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.util.ArrayMap;
import android.text.TextUtils;
import android.util.Pair;
import android.util.Property;
import android.view.View;

import org.apache.weex.WXEnvironment;
import org.apache.weex.common.Constants;
import org.apache.weex.common.WXErrorCode;
import org.apache.weex.utils.FunctionParser;
import org.apache.weex.utils.WXDataStructureUtil;
import org.apache.weex.utils.WXExceptionUtils;
import org.apache.weex.utils.WXLogUtils;
import org.apache.weex.utils.WXUtils;
import org.apache.weex.utils.WXViewUtils;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by furture on 2017/10/24.
 */

public class TransformParser {

    public final static String WX_TRANSLATE = "translate";
    public final static String WX_TRANSLATE_X = "translateX";
    public final static String WX_TRANSLATE_Y = "translateY";
    public final static String WX_ROTATE = "rotate";
    public final static String WX_ROTATE_X ="rotateX";
    public final static String WX_ROTATE_Y ="rotateY";
    public final static String WX_ROTATE_Z ="rotateZ";
    public final static String WX_SCALE = "scale";
    public final static String WX_SCALE_X = "scaleX";
    public final static String WX_SCALE_Y = "scaleY";

    public final static String BACKGROUND_COLOR = Constants.Name.BACKGROUND_COLOR;
    public final static String WIDTH = Constants.Name.WIDTH;
    public final static String HEIGHT = Constants.Name.HEIGHT;
    public final static String TOP = "top";
    public final static String BOTTOM = "bottom";
    public final static String RIGHT = "right";
    public final static String LEFT = "left";
    public final static String CENTER = "center";
    private static final String HALF = "50%";
    private static final String FULL = "100%";
    private static final String ZERO = "0%";
    private static final String PX = "px";
    private static final String DEG = "deg";
    public static Map<String, List<Property<View,Float>>> wxToAndroidMap = new ArrayMap<>();


    static {
        wxToAndroidMap.put(WX_TRANSLATE, Arrays.asList
                (View.TRANSLATION_X, View.TRANSLATION_Y));
        wxToAndroidMap.put(WX_TRANSLATE_X, Collections.singletonList(View.TRANSLATION_X));
        wxToAndroidMap.put(WX_TRANSLATE_Y, Collections.singletonList(View.TRANSLATION_Y));
        wxToAndroidMap.put(WX_ROTATE, Collections.singletonList(View.ROTATION));
        wxToAndroidMap.put(WX_ROTATE_Z, Collections.singletonList(View.ROTATION));
        wxToAndroidMap.put(WX_ROTATE_X, Collections.singletonList(View.ROTATION_X));
        wxToAndroidMap.put(WX_ROTATE_Y, Collections.singletonList(View.ROTATION_Y));
        wxToAndroidMap.put(WX_SCALE, Arrays.asList(View.SCALE_X, View.SCALE_Y));
        wxToAndroidMap.put(WX_SCALE_X, Collections.singletonList(View.SCALE_X));
        wxToAndroidMap.put(WX_SCALE_Y, Collections.singletonList(View.SCALE_Y));
        wxToAndroidMap.put(Constants.Name.PERSPECTIVE, Collections.singletonList(CameraDistanceProperty.getInstance()));
        wxToAndroidMap = Collections.unmodifiableMap(wxToAndroidMap);
    }

    public static PropertyValuesHolder[] toHolders(Map<Property<View,Float>, Float> transformMap){
        PropertyValuesHolder[]  holders = new PropertyValuesHolder[transformMap.size()];
        int i=0;
        for (Map.Entry<Property<View, Float>, Float> entry : transformMap.entrySet()) {
            holders[i] = PropertyValuesHolder.ofFloat(entry.getKey(), entry.getValue());
            i++;
        }
        return holders;
    }

    public static Map<Property<View,Float>, Float> parseTransForm(String instanceId, @Nullable String rawTransform, final int width,
                                                                  final int height, final int viewportW) {
        try{

            if (!TextUtils.isEmpty(rawTransform)) {
                FunctionParser<Property<View,Float>, Float> parser = new FunctionParser<>
                        (rawTransform, new FunctionParser.Mapper<Property<View,Float>, Float>() {
                            @Override
                            public Map<Property<View,Float>, Float> map(String functionName, List<String> raw) {
                                if (raw != null && !raw.isEmpty()) {
                                    if (wxToAndroidMap.containsKey(functionName)) {
                                        return convertParam(width, height,viewportW, wxToAndroidMap.get(functionName), raw);
                                    }
                                }
                                return new HashMap<>();
                            }

                            private Map<Property<View,Float>, Float> convertParam(int width, int height, int viewportW,
                                                                                  @NonNull List<Property<View,Float>> propertyList,
                                                                                  @NonNull List<String> rawValue) {

                                Map<Property<View,Float>, Float> result = WXDataStructureUtil.newHashMapWithExpectedSize(propertyList.size());
                                List<Float> convertedList = new ArrayList<>(propertyList.size());
                                if (propertyList.contains(View.ROTATION) ||
                                        propertyList.contains(View.ROTATION_X) ||
                                        propertyList.contains(View.ROTATION_Y)) {
                                    convertedList.addAll(parseRotationZ(rawValue));
                                }else if (propertyList.contains(View.TRANSLATION_X) ||
                                        propertyList.contains(View.TRANSLATION_Y)) {
                                    convertedList.addAll(parseTranslation(propertyList, width, height, rawValue,viewportW));
                                } else if (propertyList.contains(View.SCALE_X) ||
                                        propertyList.contains(View.SCALE_Y)) {
                                    convertedList.addAll(parseScale(propertyList.size(), rawValue));
                                }
                                else if(propertyList.contains(CameraDistanceProperty.getInstance())){
                                    convertedList.add(parseCameraDistance(rawValue));
                                }
                                if (propertyList.size() == convertedList.size()) {
                                    for (int i = 0; i < propertyList.size(); i++) {
                                        result.put(propertyList.get(i), convertedList.get(i));
                                    }
                                }
                                return result;
                            }

                            private List<Float> parseScale(int size, @NonNull List<String> rawValue) {
                                List<Float> convertedList = new ArrayList<>(rawValue.size() * 2);
                                List<Float> rawFloat = new ArrayList<>(rawValue.size());
                                for (String item : rawValue) {
                                    rawFloat.add(WXUtils.fastGetFloat(item));
                                }
                                convertedList.addAll(rawFloat);
                                if (size != 1 && rawValue.size() == 1) {
                                    convertedList.addAll(rawFloat);
                                }
                                return convertedList;
                            }

                            private @NonNull
                            List<Float> parseRotationZ(@NonNull List<String> rawValue) {
                                List<Float> convertedList = new ArrayList<>(1);
                                int suffix;
                                for (String raw : rawValue) {
                                    if ((suffix = raw.lastIndexOf(DEG)) != -1) {
                                        convertedList.add(WXUtils.fastGetFloat(raw.substring(0, suffix)));
                                    } else {
                                        convertedList.add((float) Math.toDegrees(WXUtils.fastGetFloat(raw)));
                                    }
                                }
                                return convertedList;
                            }

                            /**
                             * As "translate(50%, 25%)" or "translate(25px, 30px)" both are valid,
                             * parsing translate is complicated than other method.
                             * Add your waste time here if you try to optimize this method like {@link #parseScale(int, List)}
                             * Time: 0.5h
                             */
                            private List<Float> parseTranslation(List<Property<View,Float>> propertyList,
                                                                 int width, int height,
                                                                 @NonNull List<String> rawValue, int viewportW) {
                                List<Float> convertedList = new ArrayList<>(2);
                                String first = rawValue.get(0);
                                if (propertyList.size() == 1) {
                                    parseSingleTranslation(propertyList, width, height, convertedList, first,viewportW);
                                } else {
                                    parseDoubleTranslation(width, height, rawValue, convertedList, first,viewportW);
                                }
                                return convertedList;
                            }

                            private void parseSingleTranslation(List<Property<View,Float>> propertyList, int width, int height,
                                                                List<Float> convertedList, String first, int viewportW) {
                                if (propertyList.contains(View.TRANSLATION_X)) {
                                    convertedList.add(parsePercentOrPx(first, width,viewportW));
                                } else if (propertyList.contains(View.TRANSLATION_Y)) {
                                    convertedList.add(parsePercentOrPx(first, height,viewportW));
                                }
                            }

                            private void parseDoubleTranslation(int width, int height,
                                                                @NonNull List<String> rawValue,
                                                                List<Float> convertedList, String first, int viewportW) {
                                String second;
                                if (rawValue.size() == 1) {
                                    second = first;
                                } else {
                                    second = rawValue.get(1);
                                }
                                convertedList.add(parsePercentOrPx(first, width,viewportW));
                                convertedList.add(parsePercentOrPx(second, height,viewportW));
                            }

                            private Float parseCameraDistance(List<String> rawValue){
                                float ret= Float.MAX_VALUE;
                                if(rawValue.size() == 1){
                                    float value = WXViewUtils.getRealPxByWidth(WXUtils.getFloat(rawValue.get(0)), viewportW);
                                    float scale = WXEnvironment.getApplication().getResources().getDisplayMetrics().density;
                                    if (!Float.isNaN(value) && value > 0) {
                                        ret = value * scale;
                                    }
                                }
                                return ret;
                            }
                        });
                return parser.parse();
            }
        }catch (Exception e){
            WXLogUtils.e("TransformParser", e);
            WXExceptionUtils.commitCriticalExceptionRT(instanceId,
                    WXErrorCode.WX_RENDER_ERR_TRANSITION,
                    "parse animation transition",
                    WXErrorCode.WX_RENDER_ERR_TRANSITION.getErrorMsg() + "parse transition error: " +  e.getMessage(),
                    null);
        }
        return new LinkedHashMap<>();
    }

    private static Pair<Float, Float> parsePivot(@Nullable String transformOrigin,
                                                 int width, int height, int viewportW) {
        if (!TextUtils.isEmpty(transformOrigin)) {
            int firstSpace = transformOrigin.indexOf(FunctionParser.SPACE);
            if (firstSpace != -1) {
                int i = firstSpace;
                for (; i < transformOrigin.length(); i++) {
                    if (transformOrigin.charAt(i) != FunctionParser.SPACE) {
                        break;
                    }
                }
                if (i < transformOrigin.length() && transformOrigin.charAt(i) != FunctionParser.SPACE) {
                    List<String> list = new ArrayList<>(2);
                    list.add(transformOrigin.substring(0, firstSpace).trim());
                    list.add(transformOrigin.substring(i, transformOrigin.length()).trim());
                    return parsePivot(list, width, height,viewportW);
                }
            }
        }
        return null;
    }

    private static Pair<Float, Float> parsePivot(@NonNull List<String> list, int width, int height, int viewportW) {
        return new Pair<>(
                parsePivotX(list.get(0), width,viewportW), parsePivotY(list.get(1), height,viewportW));
    }

    private static float parsePivotX(String x, int width, int viewportW) {
        String value = x;
        if (WXAnimationBean.Style.LEFT.equals(x)) {
            value = ZERO;
        } else if (WXAnimationBean.Style.RIGHT.equals(x)) {
            value = FULL;
        } else if (WXAnimationBean.Style.CENTER.equals(x)) {
            value = HALF;
        }
        return parsePercentOrPx(value, width,viewportW);
    }

    private static float parsePivotY(String y, int height, int viewportW) {
        String value = y;
        if (WXAnimationBean.Style.TOP.equals(y)) {
            value = ZERO;
        } else if (WXAnimationBean.Style.BOTTOM.equals(y)) {
            value = FULL;
        } else if (WXAnimationBean.Style.CENTER.equals(y)) {
            value = HALF;
        }
        return parsePercentOrPx(value, height,viewportW);
    }

    private static float parsePercentOrPx(String raw, int unit, int viewportW) {
        final int precision = 1;
        int suffix;
        if ((suffix = raw.lastIndexOf(WXUtils.PERCENT)) != -1) {
            return parsePercent(raw.substring(0, suffix), unit, precision);
        } else if ((suffix = raw.lastIndexOf(PX)) != -1) {
            return WXViewUtils.getRealPxByWidth(WXUtils.fastGetFloat(raw.substring(0, suffix), precision),viewportW);
        }
        return WXViewUtils.getRealPxByWidth(WXUtils.fastGetFloat(raw, precision),viewportW);
    }

    private static float parsePercent(String percent, int unit, int precision) {
        return WXUtils.fastGetFloat(percent, precision) / 100 * unit;
    }
}