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-rw-r--r--doc/ranger.pod5
-rw-r--r--ranger/config/rc.conf4
-rw-r--r--ranger/container/settings.py2
-rw-r--r--ranger/core/actions.py8
-rw-r--r--ranger/ext/img_display.py10
5 files changed, 27 insertions, 2 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 170ace5a..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,
 }
@@ -113,6 +114,7 @@ DEFAULT_VALUES = {
     type(None): None,
     str: "",
     int: 0,
+    float: 0.0,
     list: [],
     tuple: tuple([]),
 }
diff --git a/ranger/core/actions.py b/ranger/core/actions.py
index e8c47b9f..ae8e33d4 100644
--- a/ranger/core/actions.py
+++ b/ranger/core/actions.py
@@ -110,7 +110,8 @@ class Actions(  # pylint: disable=too-many-instance-attributes,too-many-public-m
         self.settings.set(option_name, self._parse_option_value(option_name, value),
                           localpath, tags)
 
-    def _parse_option_value(self, name, value):
+    def _parse_option_value(  # pylint: disable=too-many-return-statements
+            self, name, value):
         types = self.fm.settings.types_of(name)
         if bool in types:
             if value.lower() in ('false', 'off', '0'):
@@ -124,6 +125,11 @@ class Actions(  # pylint: disable=too-many-instance-attributes,too-many-public-m
                 return int(value)
             except ValueError:
                 pass
+        if float in types:
+            try:
+                return float(value)
+            except ValueError:
+                pass
         if str in types:
             return value
         if list in types:
diff --git a/ranger/ext/img_display.py b/ranger/ext/img_display.py
index 78d71cb2..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.
@@ -119,6 +119,14 @@ class W3MImageDisplayer(ImageDisplayer):
             input_gen = self._generate_w3m_input(path, start_x, start_y, width, height)
         except ImageDisplayError:
             raise
+
+        # Mitigate the issue with the horizontal black bars when
+        # selecting some images on some systems. 2 milliseconds seems
+        # enough. Adjust as necessary.
+        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()
         self.process.stdout.readline()