web: add select all/partial/none for search table

web/src/view/mod.rs

@@ -117,6 +117,8 @@ fn view_search_results(
         set_title(query);
     }
     let show_bulk_edit = !selected_threads.is_empty();
+    let all_checked = selected_threads.len() == results.len();
+    let partially_checked = !selected_threads.is_empty() && !all_checked;
     let rows = results.iter().map(|r| {
         let tid = r.thread.clone();
         let check_tid = r.thread.clone();
@@ -185,7 +187,25 @@ fn view_search_results(
                 "is-striped",
             ],
             thead![tr![
-                th![C!["edit"], ""],
+                th![
+                    C!["edit"],
+                    label![
+                        C!["b-checkbox", "checkbox"],
+                        input![
+                            IF!(partially_checked => C!["is-indeterminate"]),
+                            attrs! {
+                                At::Type=>"checkbox",
+                                At::Checked=>all_checked.as_at_value(),
+                            }
+                        ],
+                        span![C!["check"]],
+                        ev(Ev::Click, move |_| if all_checked {
+                            Msg::SelectionSetNone
+                        } else {
+                            Msg::SelectionSetAll
+                        })
+                    ]
+                ],
                 th![C!["from"], "From"],
                 th![C!["subject"], "Subject"],
                 th![C!["date"], "Date"]