zt_blue: Support transparency in zt blue theme.

Author: neiljp

zulipterminal/themes/zt_blue.py

@@ -6,71 +6,73 @@
 """
 from pygments.styles.zenburn import ZenburnStyle
 
+from zulipterminal.config.color import Background
 from zulipterminal.config.color import DefaultBoldColor as Color
 
 
 # fmt: off
 STYLES = {
     # style_name      :  foreground                 background
-    None              : (Color.BLACK,               Color.LIGHT_BLUE),
+    None              : (Color.BLACK,               Background.COLOR),
     'selected'        : (Color.BLACK,               Color.LIGHT_GRAY),
     'msg_selected'    : (Color.BLACK,               Color.LIGHT_GRAY),
     'header'          : (Color.BLACK,               Color.DARK_BLUE),
     'general_narrow'  : (Color.WHITE,               Color.DARK_BLUE),
-    'general_bar'     : (Color.DARK_BLUE,           Color.LIGHT_BLUE),
-    'msg_sender'      : (Color.DARK_RED,            Color.LIGHT_BLUE),
-    'unread'          : (Color.LIGHT_GRAY,          Color.LIGHT_BLUE),
-    'user_active'     : (Color.LIGHT_GREEN__BOLD,   Color.LIGHT_BLUE),
-    'user_idle'       : (Color.DARK_GRAY,           Color.LIGHT_BLUE),
-    'user_offline'    : (Color.BLACK,               Color.LIGHT_BLUE),
-    'user_inactive'   : (Color.BLACK,               Color.LIGHT_BLUE),
-    'user_bot'        : (Color.BLACK,               Color.LIGHT_BLUE),
+    'general_bar'     : (Color.DARK_BLUE,           Background.COLOR),
+    'msg_sender'      : (Color.DARK_RED,            Background.COLOR),
+    'unread'          : (Color.LIGHT_GRAY,          Background.COLOR),
+    'user_active'     : (Color.LIGHT_GREEN__BOLD,   Background.COLOR),
+    'user_idle'       : (Color.DARK_GRAY,           Background.COLOR),
+    'user_offline'    : (Color.BLACK,               Background.COLOR),
+    'user_inactive'   : (Color.BLACK,               Background.COLOR),
+    'user_bot'        : (Color.BLACK,               Background.COLOR),
     'title'           : (Color.WHITE__BOLD,         Color.DARK_BLUE),
-    'column_title'    : (Color.BLACK__BOLD,         Color.LIGHT_BLUE),
-    'time'            : (Color.DARK_BLUE,           Color.LIGHT_BLUE),
+    'column_title'    : (Color.BLACK__BOLD,         Background.COLOR),
+    'time'            : (Color.DARK_BLUE,           Background.COLOR),
     'bar'             : (Color.WHITE,               Color.DARK_BLUE),
-    'msg_emoji'       : (Color.DARK_MAGENTA,        Color.LIGHT_BLUE),
-    'reaction'        : (Color.DARK_MAGENTA__BOLD,  Color.LIGHT_BLUE),
+    'msg_emoji'       : (Color.DARK_MAGENTA,        Background.COLOR),
+    'reaction'        : (Color.DARK_MAGENTA__BOLD,  Background.COLOR),
     'reaction_mine'   : (Color.LIGHT_BLUE,          Color.DARK_MAGENTA),
     'msg_heading'     : (Color.WHITE__BOLD,         Color.BLACK),
     'msg_math'        : (Color.LIGHT_GRAY,          Color.DARK_GRAY),
-    'msg_mention'     : (Color.LIGHT_RED__BOLD,     Color.LIGHT_BLUE),
+    'msg_mention'     : (Color.LIGHT_RED__BOLD,     Background.COLOR),
     'msg_link'        : (Color.DARK_BLUE,           Color.LIGHT_GRAY),
     'msg_link_index'  : (Color.DARK_BLUE__BOLD,     Color.LIGHT_GRAY),
     'msg_quote'       : (Color.BROWN,               Color.DARK_BLUE),
     'msg_bold'        : (Color.WHITE__BOLD,         Color.DARK_BLUE),
     'msg_time'        : (Color.DARK_BLUE,           Color.WHITE),
     'footer'          : (Color.WHITE,               Color.DARK_GRAY),
     'footer_contrast' : (Color.BLACK,               Color.WHITE),
-    'starred'         : (Color.LIGHT_RED__BOLD,     Color.LIGHT_BLUE),
-    'unread_count'    : (Color.YELLOW,              Color.LIGHT_BLUE),
-    'starred_count'   : (Color.BLACK,               Color.LIGHT_BLUE),
-    'table_head'      : (Color.BLACK__BOLD,         Color.LIGHT_BLUE),
+    'starred'         : (Color.LIGHT_RED__BOLD,     Background.COLOR),
+    'unread_count'    : (Color.YELLOW,              Background.COLOR),
+    'starred_count'   : (Color.BLACK,               Background.COLOR),
+    'table_head'      : (Color.BLACK__BOLD,         Background.COLOR),
     'filter_results'  : (Color.WHITE,               Color.DARK_GREEN),
     'edit_topic'      : (Color.WHITE,               Color.DARK_BLUE),
     'edit_tag'        : (Color.WHITE,               Color.DARK_BLUE),
-    'edit_author'     : (Color.DARK_GRAY,           Color.LIGHT_BLUE),
-    'edit_time'       : (Color.DARK_BLUE,           Color.LIGHT_BLUE),
-    'current_user'    : (Color.LIGHT_GRAY,          Color.LIGHT_BLUE),
-    'muted'           : (Color.LIGHT_GRAY,          Color.LIGHT_BLUE),
-    'popup_border'    : (Color.WHITE,               Color.LIGHT_BLUE),
-    'popup_category'  : (Color.LIGHT_GRAY__BOLD,    Color.LIGHT_BLUE),
+    'edit_author'     : (Color.DARK_GRAY,           Background.COLOR),
+    'edit_time'       : (Color.DARK_BLUE,           Background.COLOR),
+    'current_user'    : (Color.LIGHT_GRAY,          Background.COLOR),
+    'muted'           : (Color.LIGHT_GRAY,          Background.COLOR),
+    'popup_border'    : (Color.WHITE,               Background.COLOR),
+    'popup_category'  : (Color.LIGHT_GRAY__BOLD,    Background.COLOR),
     'popup_contrast'  : (Color.WHITE,               Color.DARK_BLUE),
-    'popup_important' : (Color.LIGHT_RED__BOLD,     Color.LIGHT_BLUE),
-    'widget_disabled' : (Color.DARK_GRAY,           Color.LIGHT_BLUE),
+    'popup_important' : (Color.LIGHT_RED__BOLD,     Background.COLOR),
+    'widget_disabled' : (Color.DARK_GRAY,           Background.COLOR),
     'area:help'       : (Color.WHITE,               Color.DARK_GREEN),
     'area:stream'     : (Color.WHITE,               Color.DARK_CYAN),
     'area:msg'        : (Color.WHITE,               Color.BROWN),
     'area:error'      : (Color.WHITE,               Color.DARK_RED),
     'area:user'       : (Color.WHITE,               Color.DARK_BLUE),
-    'search_error'    : (Color.LIGHT_RED,           Color.LIGHT_BLUE),
+    'search_error'    : (Color.LIGHT_RED,           Background.COLOR),
     'task:success'    : (Color.WHITE,               Color.DARK_GREEN),
     'task:error'      : (Color.WHITE,               Color.DARK_RED),
     'task:warning'    : (Color.WHITE,               Color.BROWN),
     'ui_code'         : (Color.DARK_BLUE,           Color.WHITE),
 }
 
 META = {
+    'background': Color.LIGHT_BLUE,
     'pygments': {
         'styles'    : ZenburnStyle().styles,
         'background': 'h25',