From c862af09f29c6ea0a6b60e480aa0b6e6f760d2de Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Mon, 1 Feb 2021 23:14:21 +0900
Subject: [PATCH] Fix toggle-preview-wrap action

Fix #2336
---
 src/terminal.go |  2 ++
 test/test_go.rb | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/terminal.go b/src/terminal.go
index 5d78c6b..f5fb480 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -2222,6 +2222,8 @@ func (t *Terminal) Loop() {
 			case actTogglePreviewWrap:
 				if t.hasPreviewWindow() {
 					t.previewOpts.wrap = !t.previewOpts.wrap
+					// Reset preview version so that full redraw occurs
+					t.previewed.version = 0
 					req(reqPreviewRefresh)
 				}
 			case actToggleSort:
diff --git a/test/test_go.rb b/test/test_go.rb
index 142b2d1..8f80589 100755
--- a/test/test_go.rb
+++ b/test/test_go.rb
@@ -1864,6 +1864,19 @@ class TestGoFZF < TestBase
     tmux.send_keys "#{FZF} --preview 'seq 1000 | nl' --preview-window down:noborder:follow", :Enter
     tmux.until { |lines| assert_equal '1000  1000', lines[-1].strip }
   end
+
+  def test_toggle_preview_wrap
+    tmux.send_keys "#{FZF} --preview 'for i in $(seq $FZF_PREVIEW_COLUMNS); do echo -n .; done; echo wrapped; echo 2nd line' --bind ctrl-w:toggle-preview-wrap", :Enter
+    2.times do
+      tmux.until { |lines| assert_includes lines[2], '2nd line' }
+      tmux.send_keys 'C-w'
+      tmux.until do |lines|
+        assert_includes lines[2], 'wrapped'
+        assert_includes lines[3], '2nd line'
+      end
+      tmux.send_keys 'C-w'
+    end
+  end
 end
 
 module TestShell