mirror of https://github.com/NekoX-Dev/NekoX.git
153 lines
4.8 KiB
Java
153 lines
4.8 KiB
Java
/*
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* This is the source code of Telegram for Android v. 1.7.x.
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* It is licensed under GNU GPL v. 2 or later.
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* You should have received a copy of the license in this archive (see LICENSE).
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*
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* Copyright Nikolai Kudashov, 2013-2014.
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*/
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package org.telegram.ui.Adapters;
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import android.util.SparseArray;
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import android.view.View;
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import android.view.ViewGroup;
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public abstract class BaseSectionsAdapter extends BaseFragmentAdapter {
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private SparseArray<Integer> sectionPositionCache;
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private SparseArray<Integer> sectionCache;
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private SparseArray<Integer> sectionCountCache;
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private int sectionCount;
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private int count;
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private void cleanupCache() {
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sectionCache = new SparseArray<Integer>();
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sectionPositionCache = new SparseArray<Integer>();
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sectionCountCache = new SparseArray<Integer>();
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count = -1;
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sectionCount = -1;
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}
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public BaseSectionsAdapter() {
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super();
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cleanupCache();
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}
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@Override
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public void notifyDataSetChanged() {
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cleanupCache();
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super.notifyDataSetChanged();
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}
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@Override
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public void notifyDataSetInvalidated() {
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cleanupCache();
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super.notifyDataSetInvalidated();
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}
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@Override
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public boolean areAllItemsEnabled() {
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return false;
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}
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@Override
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public boolean isEnabled(int position) {
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return isRowEnabled(getSectionForPosition(position), getPositionInSectionForPosition(position));
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}
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@Override
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public final long getItemId(int position) {
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return position;
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}
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@Override
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public final int getCount() {
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if (count >= 0) {
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return count;
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}
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count = 0;
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for (int i = 0; i < internalGetSectionCount(); i++) {
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count += internalGetCountForSection(i);
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}
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return count;
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}
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@Override
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public final Object getItem(int position) {
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return getItem(getSectionForPosition(position), getPositionInSectionForPosition(position));
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}
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@Override
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public final int getItemViewType(int position) {
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return getItemViewType(getSectionForPosition(position), getPositionInSectionForPosition(position));
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}
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@Override
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public final View getView(int position, View convertView, ViewGroup parent) {
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return getItemView(getSectionForPosition(position), getPositionInSectionForPosition(position), convertView, parent);
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}
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private int internalGetCountForSection(int section) {
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Integer cachedSectionCount = sectionCountCache.get(section);
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if (cachedSectionCount != null) {
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return cachedSectionCount;
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}
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int sectionCount = getCountForSection(section);
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sectionCountCache.put(section, sectionCount);
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return sectionCount;
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}
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private int internalGetSectionCount() {
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if (sectionCount >= 0) {
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return sectionCount;
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}
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sectionCount = getSectionCount();
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return sectionCount;
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}
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public final int getSectionForPosition(int position) {
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Integer cachedSection = sectionCache.get(position);
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if (cachedSection != null) {
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return cachedSection;
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}
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int sectionStart = 0;
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for (int i = 0; i < internalGetSectionCount(); i++) {
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int sectionCount = internalGetCountForSection(i);
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int sectionEnd = sectionStart + sectionCount;
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if (position >= sectionStart && position < sectionEnd) {
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sectionCache.put(position, i);
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return i;
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}
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sectionStart = sectionEnd;
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}
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return 0;
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}
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public int getPositionInSectionForPosition(int position) {
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Integer cachedPosition = sectionPositionCache.get(position);
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if (cachedPosition != null) {
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return cachedPosition;
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}
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int sectionStart = 0;
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for (int i = 0; i < internalGetSectionCount(); i++) {
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int sectionCount = internalGetCountForSection(i);
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int sectionEnd = sectionStart + sectionCount;
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if (position >= sectionStart && position < sectionEnd) {
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int positionInSection = position - sectionStart;
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sectionPositionCache.put(position, positionInSection);
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return positionInSection;
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}
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sectionStart = sectionEnd;
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}
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return 0;
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}
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public abstract int getSectionCount();
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public abstract int getCountForSection(int section);
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public abstract boolean isRowEnabled(int section, int row);
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public abstract int getItemViewType(int section, int position);
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public abstract Object getItem(int section, int position);
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public abstract View getItemView(int section, int position, View convertView, ViewGroup parent);
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public abstract View getSectionHeaderView(int section, View convertView, ViewGroup parent);
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}
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