🔧 Normalize text nodes comparison, to be used in tokens detach

common/src/app/common/data.cljc

@@ -9,7 +9,7 @@
   data resources."
   (:refer-clojure :exclude [read-string hash-map merge name update-vals
                             parse-double group-by iteration concat mapcat
-                            parse-uuid max min regexp? array?])
+                            parse-uuid max min regexp? array? empty?])
   #?(:cljs
      (:require-macros [app.common.data]))
 
@@ -175,11 +175,17 @@
        (.isArray (class o))
        false)))
 
+(defn empty?
+  [val]
+  (if (or (coll? val) (string? val))
+    (clojure.core/empty? val)
+    (nil? val)))
+
 (defn not-empty?
-  [coll]
-  (if (coll? coll)
-    (boolean (seq coll))
-    (not (nil? coll))))
+  [val]
+  (if (or (coll? val) (string? val))
+    (boolean (seq val))
+    (some? val)))
 
 (defn editable-collection?
   [m]

common/src/app/common/types/text.cljc

@@ -201,6 +201,27 @@
   [text]
   (subs text 0 (min 280 (count text))))
 
+(defn- compare-text-attr
+  "Compare two attribute values and return true if they are different.
+   Take into account the following:
+    - Only process keys that belong to text node attrs (ignore deprecated
+      attributes or other things that may be attached).
+    - Consider nil values, empty strings or empty lists all equal.
+    - Normalize numeric values (legacy) into strings.
+    - No value is equal than the default value."
+  [key value1 value2]
+  (when (d/index-of text-node-attrs key)
+    (let [default-value (get default-text-attrs key)
+          normalize-value (fn [value]
+                            (as-> value $
+                              (if (number? $) (str $) $)
+                              (if (or (d/empty? $) (= $ default-value))
+                                nil
+                                $)))
+          value1' (normalize-value value1)
+          value2' (normalize-value value2)]
+      (not= value1' value2'))))
+
 (defn- compare-text-content
   "Given two content text structures, conformed by maps and vectors,
    compare them, and returns a set with the differences info.
@@ -245,8 +266,7 @@
              ;; If the key is not :text, and they are different, it is an attribute difference.
              ;; Take into account that some processes remove empty attributes, so in some
              ;; cases we will compare [] with nil, and this is not a difference.
-             (if (and (not= v1 v2)
-                      (or (d/not-empty? v1) (d/not-empty? v2)))
+             (if (compare-text-attr k v1 v2)
                (attribute-cb acc k)
                acc))))
        #{}

common/test/common_tests/logic/token_apply_test.cljc

@@ -331,7 +331,7 @@
                                                    d/txt-merge
                                                    {:fills (ths/sample-fills-color :fill-color "#fabada")
                                                     :font-size "1"
-                                                    :letter-spacing "0"
+                                                    :letter-spacing "2"
                                                     :font-family "Arial"}))
                                                 (:objects page)
                                                 {})