XFA - Create a new page in case of overflow

- it aims to fix #14071;
  - a subform is overflowing and the the target in case of overflow is itself. In this case we must create a new page.

src/core/xfa/template.js

@@ -4886,12 +4886,6 @@ class Subform extends XFAObject {
       return false;
     }
 
-    const contentArea = this[$getTemplateRoot]()[$extra].currentContentArea;
-
-    if (this.overflow && this.overflow[$getExtra]().target === contentArea) {
-      return false;
-    }
-
     if (this[$extra]._isSplittable !== undefined) {
       return this[$extra]._isSplittable;
     }
@@ -5025,18 +5019,8 @@ class Subform extends XFAObject {
     });
 
     const root = this[$getTemplateRoot]();
-    const currentContentArea = root[$extra].currentContentArea;
     const savedNoLayoutFailure = root[$extra].noLayoutFailure;
 
-    if (this.overflow) {
-      // In case of overflow in the current content area,
-      // elements must be kept in this subform so it implies
-      // to have no errors on layout failures.
-      root[$extra].noLayoutFailure =
-        root[$extra].noLayoutFailure ||
-        this.overflow[$getExtra]().target === currentContentArea;
-    }
-
     const isSplittable = this[$isSplittable]();
     if (!isSplittable) {
       setFirstUnsplittable(this);
@@ -5572,6 +5556,8 @@ class Template extends XFAObject {
 
           flush(i);
 
+          const currentIndex = i;
+
           i = Infinity;
           if (target instanceof PageArea) {
             // We must stop the contentAreas filling and go to the next page.
@@ -5579,9 +5565,15 @@ class Template extends XFAObject {
           } else if (target instanceof ContentArea) {
             const index = contentAreas.findIndex(e => e === target);
             if (index !== -1) {
-              // In the next loop iteration `i` will be incremented, note the
-              // `continue` just below, hence we need to subtract one here.
-              i = index - 1;
+              if (index > currentIndex) {
+                // In the next loop iteration `i` will be incremented, note the
+                // `continue` just below, hence we need to subtract one here.
+                i = index - 1;
+              } else {
+                // The targetted contentArea has already been filled
+                // so create a new page.
+                startIndex = index;
+              }
             } else {
               targetPageArea = target[$getParent]();
               startIndex = targetPageArea.contentArea.children.findIndex(

test/pdfs/xfa_issue14071.pdf.link

@@ -0,0 +1 @@
+https://github.com/mozilla/pdf.js/files/7225677/eimm5669e.2.pdf

test/test_manifest.json

@@ -951,6 +951,14 @@
        "link": true,
        "type": "load"
     },
+    {  "id": "xfa_issue14071",
+       "file": "pdfs/xfa_issue14071.pdf",
+       "md5": "7ef09705091602668ce22086c83a90f3",
+       "link": true,
+       "rounds": 1,
+       "enableXfa": true,
+       "type": "eq"
+    },
     {  "id": "xfa_filled_imm1344e",
        "file": "pdfs/xfa_filled_imm1344e.pdf",
        "md5": "0576d16692fcd8ef2366cb48bf296e81",