am e91387e2: Merge "[PB5] Store state in a more convenient manner"

package com.android.inputmethod.dictionarypack;

import com.android.inputmethod.latin.CollectionUtils;

import java.util.HashMap;

/**

 * Helper class to maintain the interface state of word list preferences.

 *

 * This is necessary because the views are created on-demand by calling code. There are many

 * situations where views are renewed with little relation with user interaction. For example,

 * when scrolling, the view is reused so it doesn't keep its state, which means we need to keep

 * it separately. Also whenever the underlying dictionary list undergoes a change (for example,

 * update the metadata, or finish downloading) the whole list has to be thrown out and recreated

 * in case some dictionaries appeared, disappeared, changed states etc.

 */

public class DictionaryListInterfaceState {

    public String mLastClickedId = null;

    private static class State {

        public boolean mOpen = false;

        public int mStatus = MetadataDbHelper.STATUS_UNKNOWN;

    }

    private HashMap<String, State> mWordlistToState = CollectionUtils.newHashMap();

    public boolean isOpen(final String wordlistId) {

        final State state = mWordlistToState.get(wordlistId);

        if (null == state) return false;

        return state.mOpen;

    }

    public void setOpen(final String wordlistId, final int status) {

        final State newState;

        final State state = mWordlistToState.get(wordlistId);

        newState = null == state ? new State() : state;

        newState.mOpen = true;

        newState.mStatus = status;

        mWordlistToState.put(wordlistId, newState);

    }

    public void closeAll() {

        for (final State state : mWordlistToState.values()) {

            state.mOpen = false;

        }

    }

}

        ((ViewGroup)view).setLayoutTransition(null);

        final Button button = (Button)view.findViewById(R.id.wordlist_button);

        button.setText(getButtonLabel(mStatus));

        // String identity match. This is an ==, not an .equals, on purpose.

        button.setVisibility(mWordlistId == mInterfaceState.mLastClickedId

                ? View.VISIBLE : View.INVISIBLE);

        button.setVisibility(mInterfaceState.isOpen(mWordlistId) ? View.VISIBLE : View.INVISIBLE);

        button.setOnClickListener(mActionButtonClickHandler);

        view.setOnClickListener(mPreferenceClickHandler);

    }

            if (!(parent instanceof ListView)) return;

            final ListView listView = (ListView)parent;

            final int indexToOpen;

            if (mInterfaceState.mLastClickedId == mWordlistId) {

                // This button was being shown. Clear last state to record that there isn't a

                // displayed button any more, and note that we don't want to open any button.

                mInterfaceState.mLastClickedId = null;

            // Close all first, we'll open back any item that needs to be open.

            mInterfaceState.closeAll();

            if (mInterfaceState.isOpen(mWordlistId)) {

                // This button being shown. Take note that we don't want to open any button in the

                // loop below.

                indexToOpen = -1;

            } else {

                // This button was not being shown. Mark it as the latest selected button, and

                // remember the index of this child as the one to open in the following loop.

                mInterfaceState.mLastClickedId = mWordlistId;

                // This button was not being shown. Open it, and remember the index of this

                // child as the one to open in the following loop.

                mInterfaceState.setOpen(mWordlistId, mStatus);

                indexToOpen = listView.indexOfChild(v);

            }

            final int lastDisplayedIndex =