Merge pull request #7687 from penpot/ladybenko-12440-fix-corrupt-files

🐛 Fix wasm crash when loading a file with missing font assets

frontend/src/app/render_wasm/api.cljs

@@ -102,12 +102,13 @@
 
 (defn use-shape
   [id]
+  (when wasm/context-initialized?
     (let [buffer (uuid/get-u32 id)]
       (h/call wasm/internal-module "_use_shape"
               (aget buffer 0)
               (aget buffer 1)
               (aget buffer 2)
-            (aget buffer 3))))
+              (aget buffer 3)))))
 
 (defn set-parent-id
   [id]
@@ -1078,13 +1079,15 @@
 
         ;; Initialize Wasm Render Engine
         (h/call wasm/internal-module "_init" (/ (.-width ^js canvas) dpr) (/ (.-height ^js canvas) dpr))
-        (h/call wasm/internal-module "_set_render_options" flags dpr)))
+        (h/call wasm/internal-module "_set_render_options" flags dpr))
+      (set! wasm/context-initialized? true))
     (set-canvas-size canvas)
     context-init?))
 
 (defn clear-canvas
   []
   ;; TODO: perform corresponding cleaning
+  (set! wasm/context-initialized? false)
   (h/call wasm/internal-module "_clean_up"))
 
 (defn show-grid

frontend/src/app/render_wasm/shape.cljs

@@ -13,6 +13,7 @@
    [app.common.types.shape.layout :as ctl]
    [app.main.refs :as refs]
    [app.render-wasm.api :as api]
+   [app.render-wasm.wasm :as wasm]
    [beicon.v2.core :as rx]
    [cljs.core :as c]
    [cuerdas.core :as str]))
@@ -126,6 +127,7 @@
 ;; The `set-wasm-attr!` can return a list of callbacks to be executed in a second pass.
 (defn- set-wasm-attr!
   [shape k]
+  (when wasm/context-initialized?
     (let [v  (get shape k)
           id (get shape :id)]
       (case k
@@ -233,7 +235,7 @@
             (api/set-flex-layout shape)))
 
       ;; Property not in WASM
-      nil)))
+        nil))))
 
 (defn process-shape!
   [shape properties]
@@ -256,8 +258,9 @@
        (rx/mapcat (fn [[shape-id props]] (process-shape! (get objects shape-id) props)))
        (rx/subs!
         (fn [_]
+          (when wasm/context-initialized?
             (api/update-shape-tiles)
-          (api/request-render "set-wasm-attrs")))))
+            (api/request-render "set-wasm-attrs"))))))
 
 ;; `conj` empty set initialization
 (def conj* (fnil conj #{}))

frontend/src/app/render_wasm/wasm.cljs

@@ -3,3 +3,4 @@
 (defonce internal-frame-id nil)
 (defonce internal-module #js {})
 (defonce serializers #js {})
+(defonce context-initialized? false)