core.shared: added error message

when typing zv and there is no preview_script

1 files changed, 11 insertions, 3 deletions

diff --git a/ranger/core/shared.py b/ranger/core/shared.py
index 1d0f96a0..38dc7cdd 100644
--- a/ranger/core/shared.py
+++ b/ranger/core/shared.py
@@ -17,6 +17,7 @@
 inherited, essentially acting like global variables."""
 
 from ranger.ext.lazy_property import lazy_property
+import os.path
 
 class Awareness(object):
 	pass
@@ -54,12 +55,19 @@ class SettingsAware(Awareness):
 		settings.signal_bind('setopt.colorscheme',
 				_colorscheme_name_to_class, priority=1)
 
-		def postprocess_paths(signal):
+		def after_setting_preview_script(signal):
 			if isinstance(signal.value, str):
-				import os
 				signal.value = os.path.expanduser(signal.value)
+				if not os.path.exists(signal.value):
+					signal.value = None
 		settings.signal_bind('setopt.preview_script',
-				postprocess_paths, priority=1)
+				after_setting_preview_script, priority=1)
+		def after_setting_use_preview_script(signal):
+			if signal.fm.settings.preview_script is None and signal.value:
+				signal.fm.notify("Preview script undefined or not found!",
+						bad=True)
+		settings.signal_bind('setopt.use_preview_script',
+				after_setting_use_preview_script, priority=1)
 
 		if not clean:
 			# add the custom options to the list of setting sources