From 1876f4525b4c3fbff0bccb18a5c0a8c344a01d23 Mon Sep 17 00:00:00 2001
From: wareya <wareya@gmail.com>
Date: Mon, 11 Jun 2018 14:23:44 -0400
Subject: [PATCH] improve text grabbing in text fields, large elements, and
 vertical text

---
 texthook.js | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/texthook.js b/texthook.js
index 8145ead..3d00524 100644
--- a/texthook.js
+++ b/texthook.js
@@ -1224,21 +1224,33 @@ function update(event)
     {
         nodeIsBad = false;
         
-        let hitpage = function(x, y)
+        let hitpage = function(x, searchoffset, y)
         {
+            let xoffset = 0;
+            let yoffset = 0;
+            let ele = document.elementFromPoint(x, y);
+            if(ele && window.getComputedStyle(ele).writingMode.includes("vertical"))
+                yoffset = searchoffset;
+            else
+                xoffset = searchoffset;
             let range = undefined;
             if (document.caretPositionFromPoint)
-                range = document.caretPositionFromPoint(x, y);
+                range = document.caretPositionFromPoint(x+xoffset, y+yoffset);
             else if (document.caretRangeFromPoint)
-                range = document.caretRangeFromPoint(x, y);
+                range = document.caretRangeFromPoint(x+xoffset, y+yoffset);
             if(range)
             {
                 textNode = range.offsetNode;
                 offset = range.offset;
             }
+            if(!ele.contains(textNode))
+            {
+                textNode = undefined;
+                offset = undefined;
+            }
         };
         
-        hitpage(event.clientX+search_x_offset , event.clientY);
+        hitpage(event.clientX, search_x_offset, event.clientY);
         if (platform == "android" && exists_div())
         {
             let ele = document.body.getElementsByClassName(div_class)[0];
@@ -1247,7 +1259,7 @@ function update(event)
         }
         // try without the offset
         if (textNode == undefined || (textNode.nodeType != 3 && !acceptable_element(textNode)))
-            hitpage(event.clientX, event.clientY);
+            hitpage(event.clientX, 0, event.clientY);
         
         if(!(textNode == undefined))
         {