com.taobao.weex.dom.WXEvent.java Source code

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Here is the source code for com.taobao.weex.dom.WXEvent.java

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/*
 * 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 com.taobao.weex.dom;

import android.support.v4.util.ArrayMap;

import com.alibaba.fastjson.JSONObject;
import com.taobao.weex.dom.binding.ELUtils;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 * Store value of component event
 */
public class WXEvent extends ArrayList<String> implements Serializable, Cloneable {

    private static final long serialVersionUID = -8186587029452440107L;

    /**
     * dynamic binding event args, can be null, only weex use
     * */
    private ArrayMap mEventBindingArgs;
    private ArrayMap<String, List<Object>> mEventBindingArgsValues;

    @Override
    public WXEvent clone() {
        WXEvent event = (WXEvent) super.clone();
        event.mEventBindingArgs = mEventBindingArgs;
        event.mEventBindingArgsValues = mEventBindingArgsValues;
        return event;
    }

    @Override
    public void clear() {
        if (mEventBindingArgs != null) {
            mEventBindingArgs.clear();
        }
        if (mEventBindingArgsValues != null) {
            mEventBindingArgsValues.clear();
        }
        super.clear();
    }

    public boolean remove(String o) {
        if (mEventBindingArgs != null) {
            mEventBindingArgs.remove(o);
        }
        if (mEventBindingArgsValues != null) {
            mEventBindingArgsValues.remove(o);
        }
        return super.remove(o);
    }

    /**
     * can by null
     * */
    public ArrayMap getEventBindingArgs() {
        return mEventBindingArgs;
    }

    public ArrayMap<String, List<Object>> getEventBindingArgsValues() {
        return mEventBindingArgsValues;
    }

    public void addEvent(Object event) {
        if (event instanceof CharSequence) {
            String eventName = event.toString();
            if (!contains(eventName)) {
                add(eventName);
            }
        } else if (event instanceof JSONObject) {
            JSONObject bindings = (JSONObject) event;
            String eventName = bindings.getString(WXEvent.EVENT_KEY_TYPE);
            Object args = bindings.get(WXEvent.EVENT_KEY_ARGS);
            if (eventName != null) {
                putEventBindingArgs(eventName, args);
            }
        }
    }

    public static String getEventName(Object event) {
        if (event instanceof CharSequence) {
            return event.toString();
        } else if (event instanceof JSONObject) {
            JSONObject bindings = (JSONObject) event;
            String eventName = bindings.getString(WXEvent.EVENT_KEY_TYPE);
            return eventName;
        }
        if (event == null) {
            return null;
        }
        return event.toString();
    }

    public void putEventBindingArgs(String event, Object args) {
        if (!contains(event)) {
            add(event);
        }
        if (args != null) {
            if (mEventBindingArgs == null) {
                mEventBindingArgs = new ArrayMap();
            }
            mEventBindingArgs.put(event, ELUtils.bindingBlock(args));
        }
    }

    public void putEventBindingArgsValue(String event, List<Object> value) {
        if (mEventBindingArgsValues == null) {
            mEventBindingArgsValues = new ArrayMap();
        }
        if (value == null) {
            mEventBindingArgsValues.remove(event);
        } else {
            mEventBindingArgsValues.put(event, value);
        }
    }

    /**
     *  event data format
     *  {
     *  type: 'appear',
     *  params: [
     *  { '@binding': 'index' },
     *   'static',
     *   { '@binding': 'item.name' },
     *  { '@binding': '$event' }
     *  ]
     *  }
     * */
    public static final String EVENT_KEY_TYPE = "type";
    public static final String EVENT_KEY_ARGS = "params";
}