package com.doumee.lib_coremodel.binding.viewadapter.recyclerview;
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import androidx.databinding.BindingAdapter;
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import androidx.recyclerview.widget.LinearLayoutManager;
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import androidx.recyclerview.widget.RecyclerView;
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import com.doumee.lib_coremodel.binding.command.BindingCommand;
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import java.util.concurrent.TimeUnit;
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import io.reactivex.functions.Consumer;
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import io.reactivex.subjects.PublishSubject;
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/**
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* Created by goldze on 2017/6/16.
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*/
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public class ViewAdapter {
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@BindingAdapter("lineManager")
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public static void setLineManager(RecyclerView recyclerView, LineManagers.LineManagerFactory lineManagerFactory) {
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recyclerView.addItemDecoration(lineManagerFactory.create(recyclerView));
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}
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@BindingAdapter(value = {"onScrollChangeCommand", "onScrollStateChangedCommand"}, requireAll = false)
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public static void onScrollChangeCommand(final RecyclerView recyclerView,
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final BindingCommand<ScrollDataWrapper> onScrollChangeCommand,
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final BindingCommand<Integer> onScrollStateChangedCommand) {
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recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
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private int state;
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@Override
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public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
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super.onScrolled(recyclerView, dx, dy);
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if (onScrollChangeCommand != null) {
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onScrollChangeCommand.execute(new ScrollDataWrapper(dx, dy, state));
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}
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}
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@Override
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public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
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super.onScrollStateChanged(recyclerView, newState);
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state = newState;
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if (onScrollStateChangedCommand != null) {
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onScrollStateChangedCommand.execute(newState);
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}
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}
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});
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}
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@SuppressWarnings("unchecked")
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@BindingAdapter({"onLoadMoreCommand"})
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public static void onLoadMoreCommand(final RecyclerView recyclerView, final BindingCommand<Integer> onLoadMoreCommand) {
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RecyclerView.OnScrollListener listener = new OnScrollListener(onLoadMoreCommand);
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recyclerView.addOnScrollListener(listener);
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}
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@BindingAdapter("itemAnimator")
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public static void setItemAnimator(RecyclerView recyclerView, RecyclerView.ItemAnimator animator) {
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recyclerView.setItemAnimator(animator);
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}
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public static class OnScrollListener extends RecyclerView.OnScrollListener {
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private PublishSubject<Integer> methodInvoke = PublishSubject.create();
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private BindingCommand<Integer> onLoadMoreCommand;
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public OnScrollListener(final BindingCommand<Integer> onLoadMoreCommand) {
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this.onLoadMoreCommand = onLoadMoreCommand;
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methodInvoke.throttleFirst(1, TimeUnit.SECONDS)
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.subscribe(new Consumer<Integer>() {
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@Override
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public void accept(Integer integer) throws Exception {
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onLoadMoreCommand.execute(integer);
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}
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});
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}
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@Override
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public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
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LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
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int visibleItemCount = layoutManager.getChildCount();
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int totalItemCount = layoutManager.getItemCount();
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int pastVisiblesItems = layoutManager.findFirstVisibleItemPosition();
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if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
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if (onLoadMoreCommand != null) {
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methodInvoke.onNext(recyclerView.getAdapter().getItemCount());
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}
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}
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}
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@Override
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public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
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super.onScrollStateChanged(recyclerView, newState);
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}
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}
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public static class ScrollDataWrapper {
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public float scrollX;
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public float scrollY;
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public int state;
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public ScrollDataWrapper(float scrollX, float scrollY, int state) {
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this.scrollX = scrollX;
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this.scrollY = scrollY;
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this.state = state;
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}
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}
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}
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