TTS should start reading from the current page

src/pyj/read_book/iframe.pyj

@@ -64,7 +64,7 @@ from read_book.touch import (
 )
 from read_book.viewport import scroll_viewport
 from select import (
-    move_end_of_selection, selection_extents, word_at_point
+    move_end_of_selection, selection_extents, word_at_point, first_visible_word
 )
 from utils import debounce, is_ios
 
@@ -903,9 +903,10 @@ class IframeBoss:
             text_node, offset = None, 0
             if data.pos:
                 r = word_at_point(data.pos.x, data.pos.y)
-                if r:
-                    if r.startContainer?.nodeType is Node.TEXT_NODE:
-                        text_node, offset = r.startContainer, r.startOffset
+            else:
+                r = first_visible_word()
+            if r and r.startContainer?.nodeType is Node.TEXT_NODE:
+                text_node, offset = r.startContainer, r.startOffset
             marked_text = tts_data(text_node, offset)
             sel = window.getSelection()
             sel.removeAllRanges()

src/pyj/select.pyj

@@ -42,6 +42,18 @@ def word_at_point(x, y):
             return r
 
 
+def first_visible_word():
+    width = window.innerWidth
+    height = window.innerHeight
+    xdelta = width // 10
+    ydelta = height // 10
+    for y in range(0, height, ydelta):
+        for x in range(0, width, xdelta):
+            r = word_at_point(x, y)
+            if r?:
+                return r
+
+
 def empty_range_extents():
     return {
         'start': {'x': 0, 'y': 0, 'height': 0, 'width': 0, 'onscreen': False, 'selected_prev': False},