Make sure that Popup is rendered next to trigger for textAnnotation

Author: hakubo

src/display/annotation_layer.js

@@ -807,11 +807,14 @@ class PopupAnnotationElement extends AnnotationElement {
     // PDF viewers ignore a popup annotation's rectangle.
     const parentTop = parseFloat(parentElement.style.top),
       parentLeft = parseFloat(parentElement.style.left),
-      parentWidth = parseFloat(parentElement.style.width);
+      parentWidth = parseFloat(parentElement.style.width),
+      parentHeight = parseFloat(parentElement.style.height);
     const popupLeft = parentLeft + parentWidth;
+    const popupTop = parentTop + parentHeight;
 
     this.container.style.transformOrigin = `${-popupLeft}px ${-parentTop}px`;
     this.container.style.left = `${popupLeft}px`;
+    this.container.style.top = `${popupTop}px`;
 
     this.container.appendChild(popup.render());
     return this.container;

test/pdfs/.gitignore

@@ -400,3 +400,4 @@
 !tiling-pattern-large-steps.pdf
 !issue11555.pdf
 !issue12337.pdf
+!pr12564.pdf

test/pdfs/pr12564.pdf

@@ -4784,5 +4784,12 @@
        "rounds": 2,
        "lastPage": 1,
        "type": "fbf"
-    }
+    },
+    {  "id": "pr12564",
+      "file": "pdfs/pr12564.pdf",
+      "md5": "8033857922eb03d050f6a04c2f5e9851",
+      "rounds": 1,
+      "type": "eq",
+      "annotations": true
+   },
 ]