Make the w3m delay configurable

4 files changed, 14 insertions, 3 deletions

diff --git a/doc/ranger.pod b/doc/ranger.pod
index 4cac8ef9..7da4478b 100644
--- a/doc/ranger.pod
+++ b/doc/ranger.pod
@@ -1017,6 +1017,11 @@ Sets the view mode, which can be B<miller> to display the files in the
 traditional miller column view that shows multiple levels of the hierarchy, or
 B<multipane> to use multiple panes (one per tab) similar to midnight-commander.
 
+=item w3m_delay [float]
+
+Delay in seconds before displaying an image with the w3m method.
+Increase it in case of experiencing display corruption.
+
 =item wrap_scroll [bool]
 
 Enable scroll wrapping - moving down while on the last item will wrap around to
diff --git a/ranger/config/rc.conf b/ranger/config/rc.conf
index 1296f1ca..58d6d243 100644
--- a/ranger/config/rc.conf
+++ b/ranger/config/rc.conf
@@ -95,6 +95,10 @@ set preview_images false
 #   whole terminal window.
 set preview_images_method w3m
 
+# Delay in seconds before displaying an image with the w3m method.
+# Increase it in case of experiencing display corruption.
+set w3m_delay 0.02
+
 # Default iTerm2 font size (see: preview_images_method: iterm2)
 set iterm2_font_width 8
 set iterm2_font_height 11
diff --git a/ranger/container/settings.py b/ranger/container/settings.py
index a7707ff0..11097cec 100644
--- a/ranger/container/settings.py
+++ b/ranger/container/settings.py
@@ -91,6 +91,7 @@ ALLOWED_SETTINGS = {
     'vcs_backend_hg': str,
     'vcs_backend_svn': str,
     'viewmode': str,
+    'w3m_delay': float,
     'wrap_scroll': bool,
     'xterm_alt_key': bool,
 }
diff --git a/ranger/ext/img_display.py b/ranger/ext/img_display.py
index f423830f..4f447f39 100644
--- a/ranger/ext/img_display.py
+++ b/ranger/ext/img_display.py
@@ -60,7 +60,7 @@ class ImageDisplayer(object):
         pass
 
 
-class W3MImageDisplayer(ImageDisplayer):
+class W3MImageDisplayer(ImageDisplayer, FileManagerAware):
     """Implementation of ImageDisplayer using w3mimgdisplay, an utilitary
     program from w3m (a text-based web browser). w3mimgdisplay can display
     images either in virtual tty (using linux framebuffer) or in a Xorg session.
@@ -123,8 +123,9 @@ class W3MImageDisplayer(ImageDisplayer):
         # Mitigate the issue with the horizontal black bars when
         # selecting some images on some systems. 2 milliseconds seems
         # enough. Adjust as necessary.
-        from time import sleep
-        sleep(0.02)
+        if self.fm.settings.w3m_delay > 0:
+            from time import sleep
+            sleep(self.fm.settings.w3m_delay)
 
         self.process.stdin.write(input_gen)
         self.process.stdin.flush()