diff options
Diffstat (limited to 'src/main')
6 files changed, 340 insertions, 0 deletions
diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml new file mode 100644 index 0000000..6e32572 --- /dev/null +++ b/src/main/AndroidManifest.xml @@ -0,0 +1,23 @@ +<?xml version="1.0" encoding="utf-8"?> +<!-- + ~ Copyright (C) 2021-2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + ~ + ~ This file is part of TOP-TAB Android. + ~ + ~ TOP-TAB Android is free software: you can redistribute it and/or modify + ~ it under the terms of the GNU General Public License as published by + ~ the Free Software Foundation, either version 3 of the License, or + ~ (at your option) any later version. + ~ + ~ TOP-TAB Android is distributed in the hope that it will be useful, + ~ but WITHOUT ANY WARRANTY; without even the implied warranty of + ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + ~ GNU General Public License for more details. + ~ + ~ You should have received a copy of the GNU General Public License + ~ along with TOP-TAB Android. If not, see <https://www.gnu.org/licenses/>. + --> + +<manifest xmlns:android="http://schemas.android.com/apk/res/android"> + +</manifest>
\ No newline at end of file diff --git a/src/main/java/it/alessandroiezzi/commons/page/Page.java b/src/main/java/it/alessandroiezzi/commons/page/Page.java new file mode 100644 index 0000000..333dd4f --- /dev/null +++ b/src/main/java/it/alessandroiezzi/commons/page/Page.java @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + * + * This file is part of commons-page. + * + * commons-page is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * commons-page is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with commons-page. If not, see <https://www.gnu.org/licenses/>. + */ + +package it.alessandroiezzi.commons.page; + +import java.util.*; + +public interface Page<T> { + List<T> getContent(); + int getSize(); + int getNumberOfElements(); +} diff --git a/src/main/java/it/alessandroiezzi/commons/page/PageAdapter.java b/src/main/java/it/alessandroiezzi/commons/page/PageAdapter.java new file mode 100644 index 0000000..8774677 --- /dev/null +++ b/src/main/java/it/alessandroiezzi/commons/page/PageAdapter.java @@ -0,0 +1,170 @@ +/* + * Copyright (C) 2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + * + * This file is part of commons-page. + * + * commons-page is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * commons-page is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with commons-page. If not, see <https://www.gnu.org/licenses/>. + */ + +package it.alessandroiezzi.commons.page; + +import java.util.*; +import java.util.function.*; + +public class PageAdapter<T> implements Pages<T> { + private final List<T> elements; + private final int pageSize; + private int pageNumber; + private PageChangeListener<T> pageChangeListener; + boolean pageChanged = false; + private Page<T> currentPage; + + public PageAdapter(List<T> elements) { + this(elements, 15); + } + + public PageAdapter(List<T> elements, int pageSize) { + this.elements = elements; + this.pageSize = pageSize; + this.pageNumber = 0; + } + + @Override + public Page<T> firstPage() { + return toPage(0); + } + + @Override + public Page<T> previousPage() { + return toPage(pageNumber - 1); + } + + @Override + public Page<T> nextPage() { + return toPage(pageNumber + 1); + } + + @Override + public Page<T> lastPage() { + return toPage(getTotalPages() - 1); + } + + @Override + public Page<T> toPage(int page) { + if (page < 0) { + page = 0; + } else if (page >= getTotalPages()) { + page = getTotalPages() - 1; + } + + int totalElements = getNumberOfElements(); + int startIndex = page * pageSize; + if (startIndex > totalElements) { + startIndex = totalElements; + } + + int count = startIndex + pageSize; + if (count > totalElements) { + count = totalElements; + } + + pageChanged = page != pageNumber; + pageNumber = page; + List<T> subElements = elements.subList(startIndex, count); + currentPage = new PageImpl<>(subElements, pageSize); + + if (pageChangeListener != null && pageChanged) { + pageChangeListener.pageChanged(new ArrayList<>(subElements), pageSize); + } + + return currentPage; + } + + @Override + public Page<T> getCurrentPage() { + return currentPage; + } + + @Override + public int getCurrentPageNumber() { + return pageNumber; + } + + @Override + public List<T> getContent() { + return getCurrentPage().getContent(); + } + + @Override + public int getSize() { + return pageSize; + } + + @Override + public int getNumberOfElements() { + return elements.size(); + } + + @Override + public void addElement(T element) { + elements.add(element); + } + + @Override + public void removeElement(T element) { + elements.remove(element); + } + + @Override + public void removeElementIf(Predicate<T> predicate) { + elements.removeIf(predicate); + } + + @Override + public int getTotalPages() { + double pages = (double) getNumberOfElements() / (double) getSize(); + int pagesInt = (int) pages; + + if (pages > pagesInt) + pagesInt++; + + return pagesInt; + } + + @Override + public void addPageChangeListener(PageChangeListener<T> pageChangeListener) { + this.pageChangeListener = pageChangeListener; + } + + @Override + public List<T> getAllElements() { + return elements; + } + + @Override + public boolean isPageChanged() { + return pageChanged; + } + + @Override + public int from() { + return (pageNumber * pageSize) + 1; + } + + @Override + public int to() { + int currentSize = getContent().size(); + return currentSize < pageSize ? getNumberOfElements() : (pageNumber + 1) * currentSize; + } +} diff --git a/src/main/java/it/alessandroiezzi/commons/page/PageChangeListener.java b/src/main/java/it/alessandroiezzi/commons/page/PageChangeListener.java new file mode 100644 index 0000000..a489ddc --- /dev/null +++ b/src/main/java/it/alessandroiezzi/commons/page/PageChangeListener.java @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + * + * This file is part of commons-page. + * + * commons-page is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * commons-page is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with commons-page. If not, see <https://www.gnu.org/licenses/>. + */ + +package it.alessandroiezzi.commons.page; + +import java.util.*; + +public interface PageChangeListener<T> { + void pageChanged(List<T> elements, int pageSize); +} diff --git a/src/main/java/it/alessandroiezzi/commons/page/PageImpl.java b/src/main/java/it/alessandroiezzi/commons/page/PageImpl.java new file mode 100644 index 0000000..1db709f --- /dev/null +++ b/src/main/java/it/alessandroiezzi/commons/page/PageImpl.java @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + * + * This file is part of commons-page. + * + * commons-page is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * commons-page is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with commons-page. If not, see <https://www.gnu.org/licenses/>. + */ + +package it.alessandroiezzi.commons.page; + +import java.util.*; + +public class PageImpl<T> implements Page<T> { + private final List<T> content = new ArrayList<>(); + private final int size; + + public PageImpl(List<T> content, int pageSize) { + int i = pageSize; + for (T element : content) { + if (i-- == 0) break; + this.content.add(element); + } + this.size = pageSize; + } + + @Override + public List<T> getContent() { + return content; + } + + @Override + public int getSize() { + return size; + } + + @Override + public int getNumberOfElements() { + return content.size(); + } +} diff --git a/src/main/java/it/alessandroiezzi/commons/page/Pages.java b/src/main/java/it/alessandroiezzi/commons/page/Pages.java new file mode 100644 index 0000000..2f6e98c --- /dev/null +++ b/src/main/java/it/alessandroiezzi/commons/page/Pages.java @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2022 Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it> + * + * This file is part of commons-page. + * + * commons-page is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * commons-page is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with commons-page. If not, see <https://www.gnu.org/licenses/>. + */ + +package it.alessandroiezzi.commons.page; + +import java.util.*; +import java.util.function.*; + +public interface Pages<T> extends Page<T> { + Page<T> firstPage(); + Page<T> lastPage(); + Page<T> previousPage(); + Page<T> nextPage(); + Page<T> toPage(int page); + Page<T> getCurrentPage(); + int getCurrentPageNumber(); + int getTotalPages(); + void addElement(T element); + void removeElement(T element); + void removeElementIf(Predicate<T> predicate); + void addPageChangeListener(PageChangeListener<T> pageChangeListener); + List<T> getAllElements(); + boolean isPageChanged(); + int from(); + int to(); +} |