Show error message when scheme is unsupported + updated readme

When the color scheme is not a raw file on the filesystem, show a message in the status area.

Also, created a method for getting the path of the current scheme and cleaned up some copy/pasted code.

Changed a bunch of instances of 'theme' to 'color scheme' for accuracy.

Author: gsboylan

BackgroundColorEdit.py

@@ -3,31 +3,40 @@
 
 import plistlib
 import re
+import os.path as path
 
 class EditBackgroundColorCommand(sublime_plugin.WindowCommand):
     def run(self):
         sublime.active_window().show_input_panel("New hex background color", "#", change_background_color, None, None)
 
 class ShowBackgroundColorCommand(sublime_plugin.WindowCommand):
     def run(self):
-        currentThemeName = str.lstrip(
-            sublime.load_settings('Preferences.sublime-settings').get('color_scheme', ''), 'Packages')
+        currentSchemePath = getCurrentSchemePath()
 
-        currentThemePath = sublime.packages_path() + currentThemeName
+        if path.isfile(currentSchemePath):
+            tree = plistlib.readPlist(currentSchemePath)
+            sublime.active_window().status_message(
+                "Current background color: " + tree['settings'][0]['settings']['background'])
 
-        tree = plistlib.readPlist(currentThemePath)
-        sublime.active_window().status_message(
-            "Current background color: " + tree['settings'][0]['settings']['background'])
+        else:
+            sublime.active_window().status_message("The current color scheme is not supported.")
 
 def change_background_color(userInput):
     match = re.search(r'^#(?:[0-9a-fA-F]{1,2}){3}$', userInput)
 
     if match:
-        currentThemeName = str.lstrip(
-            sublime.load_settings('Preferences.sublime-settings').get('color_scheme', ''), 'Packages')
+        currentSchemePath = getCurrentSchemePath()
 
-        currentThemePath = sublime.packages_path() + currentThemeName
+        if path.isfile(currentSchemePath):
+            tree = plistlib.readPlist(currentSchemePath)
+            tree['settings'][0]['settings']['background'] = userInput
+            plistlib.writePlist(tree, currentSchemePath)
 
-        tree = plistlib.readPlist(currentThemePath)
-        tree['settings'][0]['settings']['background'] = userInput
-        plistlib.writePlist(tree, currentThemePath)
+        else:
+            sublime.active_window().status_message("The current color scheme is not supported.")
+
+def getCurrentSchemePath():
+    currentSchemeName = str.lstrip(
+    sublime.load_settings('Preferences.sublime-settings').get('color_scheme', ''), 'Packages')
+
+    return sublime.packages_path() + currentSchemeName

README.md

@@ -1,8 +1,8 @@
 # BackgroundColorEdit
 
-Allows you to quickly and easily change only the background color of the currently active theme in Sublime Text 3.
+Allows you to quickly and easily change only the background color of the currently active color scheme in Sublime Text 3.
 
-Currenntly only works with themes installed via [Colorsublime](colorsublime.com/).
+Currenntly only works with color schemes installed via [Colorsublime](colorsublime.com/).
 
 ## Requirements
 
@@ -28,8 +28,8 @@ Clone this repo to your Sublime Text 'Packages' directory, which can be found vi
 1. Open the command palette (`ctrl+shift+p` or `cmd+shift+p` by default)
 2. Search for `BackgroundColorEdit: Set Background Color`
 3. Type a hex color code in the prompt provided and press enter to apply.
-4. Alternately, search for `BackgroundColorEdit: Show Background Color` to print out the active theme's current background color to the status bar.
+4. Alternately, search for `BackgroundColorEdit: Show Background Color` to print out the active color scheme's current background color to the status bar.
 
 ## Resetting the background color
 
-Simply reinstall the theme in Colorsublime.
+Simply reinstall the color scheme in Colorsublime.