Initial commit

site/OFF_plugins/kirby-panel-prevnext/field/assets/css/style.css

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+.plugin-prevnext {
+	display: flex;
+	flex-wrap: wrap;
+	justify-content: space-between;
+}
+
+.plugin-prevnext a {
+	margin: .5em;
+}
+
+.plugin-prevnext .prev i {
+	margin-right: .5em;
+}
+.plugin-prevnext .next i {
+	margin-left: .5em;
+}
+
+.plugin-prevnext a {
+	color: #777;
+}
+
+.plugin-prevnext a:hover {
+	color: #000;
+}
+
+.plugin-prevnext .prev {
+	margin-right: .5em;
+}
+
+.plugin-prevnext .next {
+	margin-left: .5em;
+}

site/OFF_plugins/kirby-panel-prevnext/field/prevnext.php

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+<?php
+/*
+class pagejump {
+	// Reverse one
+	public static function reverse( $item ) {
+		//echo $steps;
+		echo $item->url();
+
+		$obj = ( $item->hasPrev() ) ? $item->prev() : $item->siblings()->last();
+
+		echo $obj->url();
+		return $obj;
+	}
+	// Forward one
+	public static function forward( $item ) {
+		$obj = ( $item->hasNext() ) ? $item->next() : $item->siblings()->first();
+		return $obj;
+	}
+	// Jump
+	public static function jump( $steps, $item = null ) {
+		//$item = ( ! empty( $item ) ) ? $item : page();
+		for( $i = 0; $i < abs( $steps ); $i++ ) {
+			if( $steps <= 0 ) {
+				$item = self::reverse( $item );
+			} else {
+				$item = self::forward( $item );
+			}
+		}
+		return $item;
+	}
+}
+// Wrapper function for template
+page::$methods['jump'] = function($page, $steps) {
+	return pagejump::jump( $steps, $page );
+};*/
+
+class PrevnextField extends BaseField {
+	static public $fieldname = 'prevnext';
+	static public $assets = array(
+		'css' => array(
+			'style.css',
+		)
+	);
+
+	public function input() {
+		#echo $this->page->prev()->slug();
+		#echo page($this->page->id())->prev()->slug();
+		$html = tpl::load( __DIR__ . DS . 'template.php', $data = array(
+			'page' => $this->page
+		));
+		return $html;
+	}
+}

site/OFF_plugins/kirby-panel-prevnext/field/template.php

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+<?php
+$page_obj = page($page->id());
+
+if( $page_obj->siblings()->count() > 1 ) {
+	if ( $page_obj->hasPrev() ) {
+		$prev = $page_obj->prev();
+	} else {
+		$prev = $page_obj->siblings()->last();
+	}
+
+	if ( $page_obj->hasNext() ) {
+		$next = $page_obj->next();
+	} else {
+		$next = $page_obj->siblings()->first();
+	}
+	?>
+
+	<div class="plugin-prevnext">
+		<a class="prev" href="<?php echo panel()->urls()->index() . '/pages/' . $prev->id() . '/edit'; ?>">
+			<i class="fa fa-chevron-left" aria-hidden="true"></i>
+			<?php echo $prev->title(); ?>
+		</a>
+
+		<a class="next" href="<?php echo panel()->urls()->index() . '/pages/' . $next->id() . '/edit'; ?>">
+			<?php echo $next->title(); ?>
+			<i class="fa fa-chevron-right" aria-hidden="true"></i>
+		</a>
+	</div>
+<?php } else {
+	?>
+	<style>
+	.field-name-prevnext {
+		display: none;
+	}
+	</style>
+	<?php
+}