From 4c36bce5bd3777f6a749ad96f1dc0b42ebc69810 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Wed, 18 Mar 2020 09:52:13 +0100
Subject: [PATCH] :sparkles: Deprecate uxbox.util.components.

---
 .../main/ui/components/chunked_list.cljs      | 44 +++++++++++++++++++
 frontend/src/uxbox/main/ui/react_hooks.cljs   | 25 +++++++++++
 .../src/uxbox/main/ui/workspace/rules.cljs    |  2 +-
 .../src/uxbox/main/ui/workspace/viewport.cljs |  3 +-
 frontend/src/uxbox/util/components.cljs       | 11 +----
 5 files changed, 72 insertions(+), 13 deletions(-)
 create mode 100644 frontend/src/uxbox/main/ui/components/chunked_list.cljs
 create mode 100644 frontend/src/uxbox/main/ui/react_hooks.cljs

diff --git a/frontend/src/uxbox/main/ui/components/chunked_list.cljs b/frontend/src/uxbox/main/ui/components/chunked_list.cljs
new file mode 100644
index 000000000..f727b3da1
--- /dev/null
+++ b/frontend/src/uxbox/main/ui/components/chunked_list.cljs
@@ -0,0 +1,44 @@
+;; This Source Code Form is subject to the terms of the Mozilla Public
+;; License, v. 2.0. If a copy of the MPL was not distributed with this
+;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;;
+;; This Source Code Form is "Incompatible With Secondary Licenses", as
+;; defined by the Mozilla Public License, v. 2.0.
+;;
+;; Copyright (c) 2020 UXBOX Labs S.L
+
+(ns uxbox.main.ui.components.chunked-list
+  "A collection of general purpose utility components."
+  (:require
+   [beicon.core :as rx]
+   [rumext.alpha :as mf]
+   [uxbox.util.timers :refer [schedule-on-idle]]))
+
+(mf/defc chunked-list
+  [{:keys [items children initial-size chunk-size]
+    :or {initial-size 30 chunk-size 5}
+    :as props}]
+  (letfn [(initial-state []
+            (let [total (count items)
+                  size (if (> total initial-size) initial-size total)
+                  current (take size items)
+                  pending (drop size items)]
+              {:current (vec current)
+               :pending pending
+               :pending-num (- total size)}))
+
+          (update-state [{:keys [current pending pending-num] :as state}]
+            (let [chunk-size (if (> pending-num chunk-size) chunk-size pending-num)]
+              {:current (into current (take chunk-size pending))
+               :pending (drop chunk-size pending)
+               :pending-num (- pending-num chunk-size)}))
+          (after-render [state]
+            (when (pos? (:pending-num @state))
+              (let [sem (schedule-on-idle (fn [] (swap! state update-state)))]
+                #(rx/cancel! sem))))]
+
+    (let [initial (mf/use-memo initial-state)
+          state   (mf/use-state initial)]
+      (mf/use-effect {:deps true :fn #(after-render state)})
+      (for [item (:current @state)]
+        (children item)))))
diff --git a/frontend/src/uxbox/main/ui/react_hooks.cljs b/frontend/src/uxbox/main/ui/react_hooks.cljs
new file mode 100644
index 000000000..6929a71ae
--- /dev/null
+++ b/frontend/src/uxbox/main/ui/react_hooks.cljs
@@ -0,0 +1,25 @@
+;; This Source Code Form is subject to the terms of the Mozilla Public
+;; License, v. 2.0. If a copy of the MPL was not distributed with this
+;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;;
+;; This Source Code Form is "Incompatible With Secondary Licenses", as
+;; defined by the Mozilla Public License, v. 2.0.
+;;
+;; Copyright (c) 2020 UXBOX Labs S.L
+
+(ns uxbox.main.ui.react-hooks
+  "A collection of general purpose react hooks."
+  (:require
+   [beicon.core :as rx]
+   [rumext.alpha :as mf]))
+
+(defn use-rxsub
+  [ob]
+  (let [[state reset-state!] (mf/useState @ob)]
+    (mf/useEffect
+     (fn []
+       (let [sub (rx/subscribe ob #(reset-state! %))]
+         #(rx/cancel! sub)))
+     #js [ob])
+    state))
+
diff --git a/frontend/src/uxbox/main/ui/workspace/rules.cljs b/frontend/src/uxbox/main/ui/workspace/rules.cljs
index 0d61e88a2..3e68885bc 100644
--- a/frontend/src/uxbox/main/ui/workspace/rules.cljs
+++ b/frontend/src/uxbox/main/ui/workspace/rules.cljs
@@ -14,7 +14,7 @@
    [uxbox.main.refs :as refs]
    [uxbox.main.store :as s]
    [uxbox.main.streams :as ms]
-   [uxbox.util.components :refer [use-rxsub]]
+   [uxbox.main.ui.react-hooks :refer [use-rxsub]]
    [uxbox.util.dom :as dom]))
 
 ;; --- Constants & Helpers
diff --git a/frontend/src/uxbox/main/ui/workspace/viewport.cljs b/frontend/src/uxbox/main/ui/workspace/viewport.cljs
index 8bba7b504..3c308b8ac 100644
--- a/frontend/src/uxbox/main/ui/workspace/viewport.cljs
+++ b/frontend/src/uxbox/main/ui/workspace/viewport.cljs
@@ -27,9 +27,8 @@
    [uxbox.main.ui.shapes :refer [shape-wrapper frame-wrapper]]
    [uxbox.main.ui.workspace.drawarea :refer [draw-area]]
    [uxbox.main.ui.workspace.selection :refer [selection-handlers]]
-   [uxbox.util.data :refer [parse-int]]
+   [uxbox.main.ui.react-hooks :refer [use-rxsub]]
    [uxbox.util.perf :as perf]
-   [uxbox.util.components :refer [use-rxsub]]
    [uxbox.util.uuid :as uuid]
    [uxbox.util.dom :as dom]
    [uxbox.util.geom.point :as gpt])
diff --git a/frontend/src/uxbox/util/components.cljs b/frontend/src/uxbox/util/components.cljs
index 5599d6cb3..0e88340f7 100644
--- a/frontend/src/uxbox/util/components.cljs
+++ b/frontend/src/uxbox/util/components.cljs
@@ -11,6 +11,7 @@
    [rumext.alpha :as mf]
    [uxbox.util.timers :refer [schedule-on-idle]]))
 
+;; TODO: this file is DEPRECATED (pending deletion)
 
 (mf/defc chunked-list
   [{:keys [items children initial-size chunk-size]
@@ -41,16 +42,6 @@
       (for [item (:current @state)]
         (children item)))))
 
-(defn use-rxsub
-  [ob]
-  (let [[state reset-state!] (mf/useState @ob)]
-    (mf/useEffect
-     (fn []
-       (let [sub (rx/subscribe ob #(reset-state! %))]
-         #(rx/cancel! sub)))
-     #js [ob])
-    state))
-
 (defn wrap-catch
   ([component error-component] (wrap-catch component error-component (constantly nil)))
   ([component error-component on-error]