collection = $collection; $this->helper = $helper; $this->options = array_merge($this->defaultOptions(), $options); } public function toHtml() { $html = implode(array_map(function($item){ if (is_int($item)) return $this->pageNumber($item); else return $this->$item(); }, $this->pagination()), $this->options['link_separator']); return $this->options['container'] ? $this->htmlContainer($html) : $html; } protected function defaultOptions() { return [ 'previous_label' => '← ' . $this->helper->t('actionview.helper.will_paginate.previous'), 'next_label' => $this->helper->t('actionview.helper.will_paginate.next') . ' →', 'container' => true, 'link_separator' => ' ' ]; } protected function pageNumber($page) { if ($page != $this->collection->currentPage()) return $this->link($page, $page, ['rel' => $this->relValue($page)]); else return $this->tag('span', $page, ['class' => 'current']); } protected function gap() { return '…'; } protected function previousPage() { $num = $this->collection->currentPage() > 1 ? $this->collection->currentPage() - 1 : false; return $this->previousOrNextPage($num, $this->options['previous_label'], 'previousPage'); } protected function nextPage() { $num = $this->collection->currentPage() < $this->collection->totalPages() ? $this->collection->currentPage() + 1 : false; return $this->previousOrNextPage($num, $this->options['next_label'], 'nextPage'); } protected function previousOrNextPage($page, $text, $classname) { if ($page) return $this->link($text, $page, ['class' => $classname]); else return $this->tag('span', $text, ['class' => $classname . ' disabled']); } protected function htmlContainer($html) { return $this->tag('div', $html, $this->containerAttributes()); } protected function containerAttributes() { return ['class' => 'pagination']; } protected function relValue($page) { if ($this->collection->currentPage() - 1 == $page) return 'prev' . ($page == 1 ? ' start' : ''); elseif ($this->collection->currentPage() + 1 == $page) return 'next'; elseif ($page == 1) return 'start'; } protected function pagination() { $pages = $this->collection->totalPages(); $page = $this->collection->currentPage(); $pagination = []; $pagination[] = 'previousPage'; $pagination[] = 1; if ($pages < 10){ for ($i = 2; $i <= $pages; $i++){ $pagination[] = $i; } } elseif ($page > ($pages - 4)) { $pagination[] = 'gap'; for ($i = ($pages - 4); $i < ($pages); $i++) { $pagination[] = $i; } } elseif ($page > 4) { $pagination[] = 'gap'; for ($i = ($page - 1); $i <= ($page + 2); $i++) { $pagination[] = $i; } $pagination[] = 'gap'; } else { if ($page >= 3){ for ($i = 2; $i <= $page+2; $i++) { $pagination[] = $i; } } else { for ($i = 2; $i <= 5; $i++) { $pagination[] = $i; } } $pagination[] = 'gap'; } if ($pages >= 10) { if ($pages == $page) $pagination[] = $i; else $pagination[] = $pages; } $pagination[] = 'nextPage'; return $pagination; } protected function link($text, $page, array $attrs = []) { return $this->helper->linkTo($text, array_merge(['#index'], $this->params()->query_parameters(), ['page' => $page]), $attrs); } protected function tag($type, $content, array $attrs = []) { return $this->helper->contentTag($type, $content, $attrs); } protected function params() { return Rails::application()->dispatcher()->parameters(); } }