From 769ca0c59f4eb8533c239d09dc4111a83a67415b Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 27 Jul 2020 13:42:13 +0530
Subject: [PATCH] Avoid multiple calls to getComputedStyle()

---
 src/pyj/read_book/paged_mode.pyj | 2 +-
 src/pyj/read_book/viewport.pyj   | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/pyj/read_book/paged_mode.pyj b/src/pyj/read_book/paged_mode.pyj
index d2fc6ad201..7493cfd37e 100644
--- a/src/pyj/read_book/paged_mode.pyj
+++ b/src/pyj/read_book/paged_mode.pyj
@@ -164,8 +164,8 @@ def current_page_width():
 def layout(is_single_page, on_resize):
     nonlocal _in_paged_mode, col_width, col_and_gap, screen_height, gap, screen_width, is_full_screen_layout, cols_per_screen, number_of_cols
     line_height(True)
-    scroll_viewport.initialize_on_layout()
     body_style = window.getComputedStyle(document.body)
+    scroll_viewport.initialize_on_layout(body_style)
     first_layout = not _in_paged_mode
     cps = calc_columns_per_screen()
     if first_layout:
diff --git a/src/pyj/read_book/viewport.pyj b/src/pyj/read_book/viewport.pyj
index abe5d6ab37..37565fda08 100644
--- a/src/pyj/read_book/viewport.pyj
+++ b/src/pyj/read_book/viewport.pyj
@@ -23,13 +23,13 @@ class ScrollViewport:
         for attr in FUNCTIONS:
             self[attr] = self[prefix + attr]
 
-    def initialize_on_layout(self):
-        self.rtl = False
-        self.ltr = True
-        body_style = window.getComputedStyle(document.body)
+    def initialize_on_layout(self, body_style):
         if body_style.direction is "rtl":
             self.rtl = True
             self.ltr = False
+        else:
+            self.rtl = False
+            self.ltr = True
 
     def flow_x(self):
         if self.rtl: