add_params, div, pagination

git-svn-id: https://webim.svn.sourceforge.net/svnroot/webim/trunk@15 c66351dc-e62f-0410-b875-e3a5c0b9693f

src/webim/libs/common.php

@@ -240,4 +240,19 @@ function get_gifimage_size($file) {
 	return array(0,0);
 }
 
+function add_params($servlet, $params) {
+	$infix = '?';
+	if( strstr($servlet,$infix) !== FALSE )
+		$infix = '&';
+	foreach($params as $k => $v) {
+		$servlet .= $infix.$k."=".$v;
+		$infix = '&';
+	}
+	return $servlet;
+}
+
+function div($a,$b) {
+    return ($a-($a % $b)) / $b;
+}
+
 ?>

src/webim/libs/pagination.php

@@ -0,0 +1,99 @@
+<?php
+/*
+ * This file is part of Web Instant Messenger project.
+ *
+ * Copyright (c) 2005-2007 Internet Services Ltd.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Evgeny Gryaznov - initial API and implementation
+ */
+
+$pagination_spacing = "&nbsp;&nbsp;&nbsp;";
+$links_on_page = 5;
+
+function generate_pagination_link($page,$title) {
+	$lnk = $_SERVER['REQUEST_URI'];
+	$href = preg_replace("/\?page=\d+\&/", "?", preg_replace("/\&page=\d+/", "", $lnk));
+	$href .= strstr($href,"?") ? "&page=$page" : "?page=$page";
+	return "<a href=\"$href\" class=\"pagelink\">$title</a>";
+}
+
+function generate_pagination_image($id) {
+	global $webimroot;
+	return "<img src=\"$webimroot/images/$id.gif\" border=\"0\"/>";
+}
+
+function setup_pagination($items) {
+	global $page;
+
+	if( $items ) {
+		$items_per_page = verifyparam("items", "/^\d{1,3}$/", 2);
+		if( $items_per_page < 2 )
+			$items_per_page = 2;
+	
+		$total_pages = div(count($items) + $items_per_page - 1, $items_per_page);
+		$curr_page = verifyparam("page", "/^\d{1,6}$/", 1);
+	
+		if( $curr_page < 1 )
+			$curr_page = 1;
+		if( $curr_page > $total_pages )
+			$curr_page = $total_pages;
+	
+		$start_index = ($curr_page-1)*$items_per_page;
+		$end_index = min($start_index+$items_per_page, count($items));
+	    $page['pagination.items'] = array_slice($items, $start_index, $end_index-$start_index);
+	    $page['pagination'] = 
+	    	array(  "page" => $curr_page, "items" => $items_per_page, "total" => $total_pages, 
+	    			"count" => count($items), "start" => $start_index, "end" => $end_index );
+	} else {
+    	$page['pagination.items'] = false;
+    	$page['pagination'] = true;
+	}
+}
+
+function setup_empty_pagination() {
+	global $page;
+    $page['pagination.items'] = false;
+    $page['pagination'] = false;
+}
+
+function generate_pagination($pagination) {
+	global $pagination_spacing, $links_on_page;
+	$result = getstring2("tag.pagination.info",
+		array($pagination['page'],$pagination['total'],$pagination['start']+1,$pagination['end'],$pagination['count']))."<br/>";
+
+	if( $pagination['total'] > 1 ) {
+		$result.="<br/><div class='pagination'>";
+		$curr_page = $pagination['page'];
+
+		$minPage = max( $curr_page - $links_on_page, 1 );
+		$maxPage = min( $curr_page + $links_on_page, $pagination['total'] );
+		
+		if( $curr_page > 1 ) {
+			$result .= generate_pagination_link($curr_page-1, generate_pagination_image("prevpage")).$pagination_spacing;
+		}
+
+		for($i = $minPage; $i <= $maxPage; $i++ ) {
+			$title = abs($curr_page-$i) >= $links_on_page && $i != 1 ? "..." : $i;
+			if( $i != $curr_page)
+				$result .= generate_pagination_link($i, $title);
+			else
+				$result .= "<span class=\"pagecurrent\">$title</span>";
+			if( $i < $maxPage )
+				$result .= $pagination_spacing;
+		}
+
+
+		if( $curr_page < $pagination['total'] ) {
+			$result .= $pagination_spacing.generate_pagination_link($curr_page+1, generate_pagination_image("nextpage"));
+		}
+		$result.="</div>";
+	}
+	return $result;
+}
+
+?>