[jarun#603] implemented a custom/default list size action

bukuserver/static/bukuserver/js/page_size.js

@@ -0,0 +1,20 @@
+$(document).ready(function() {
+  const SIZES = [20, 50, 100]; // hardcoded list; see page_size_form in admin/model/layout.html
+  let pageSize = url => new URL(url || location.host).searchParams.get('page_size');
+  $(`.actions-nav .dropdown-menu`).each(function () {
+    let _sizes = $(`li a`, this).map(function () {return pageSize(this.href)}).get();
+    if (SIZES.every((x, i) => x == _sizes[i]))
+      $(`li`, this).last().clone().each(function () {
+        $('a', this).text("custom").attr('href', `#`).on('click', () => {
+          let page = prompt(`Set custom page size (empty for default)`, pageSize(location) || '');
+          if (Number(page) || (page == "")) {
+            let search = new URL(location).searchParams;
+            (page ? search.set('page_size', page) : search.delete('page_size'));
+            location.search = search;
+          } else if (page != null)
+            alert(`Invalid page size: "${page}"`);
+          return false;
+        });
+      }).appendTo(this);
+  })
+});

bukuserver/views.py

@@ -145,6 +145,7 @@ def _list_entry(self, context: Any, model: Namespace, name: str) -> Markup:
     edit_template = "bukuserver/bookmark_edit.html"
     named_filter_urls = True
     extra_css = ['/static/bukuserver/css/bookmark.css']
+    extra_js = ['/static/bukuserver/js/page_size.js']
 
     def __init__(self, *args, **kwargs):
         self.bukudb: buku.BukuDb = args[0]
@@ -241,11 +242,7 @@ def get_list(self, page, sort_field, sort_desc, _, filters, page_size=None):
             ]
             bookmarks = sorted(bookmarks, key=lambda x: x[key_idx], reverse=sort_desc)
         count = len(bookmarks)
-        if page_size and bookmarks:
-            try:
-                bookmarks = list(chunks(bookmarks, page_size))[page]
-            except IndexError:
-                bookmarks = []
+        bookmarks = page_of(bookmarks, page_size, page)
         data = []
         for bookmark in bookmarks:
             bm_sns = types.SimpleNamespace(id=None, url=None, title=None, tags=None, description=None)
@@ -445,6 +442,7 @@ def _name_formatter(self, _, model, name):
     column_formatters = {
         "name": _name_formatter,
     }
+    extra_js = ['/static/bukuserver/js/page_size.js']
 
     def __init__(self, *args, **kwargs):
         self.bukudb = args[0]
@@ -492,8 +490,7 @@ def get_list(
                 )
             )
         count = len(tags)
-        if page_size and tags:
-            tags = list(chunks(tags, page_size))[page]
+        tags = page_of(tags, page_size, page)
         data = []
         for name, usage_count in tags:
             tag_sns = types.SimpleNamespace(name=None, usage_count=None)
@@ -702,4 +699,10 @@ def index(self):
 
 def chunks(arr, n):
     n = max(1, n)
-    return (arr[i : i + n] for i in range(0, len(arr), n))
+    return [arr[i : i + n] for i in range(0, len(arr), n)]
+
+def page_of(items, size, idx):
+    try:
+        return chunks(items, size)[idx] if size and items else []
+    except IndexError:
+        return []