menu: allow names in card content and simplify define single card decks

Signed-off-by: Janar Sööt <janar.soot@gmail.com>

config/example-menu.cfg

@@ -171,6 +171,11 @@
 #items:
 #   It accepts only 'card' elements. You are able to switch between different card screens
 #   by using encoder or up/down buttons.
+#content:
+#   It allows quickly define single card decks by adding content directly to deck.
+#   You have to remove deck item attribute and use named items in content.
+#   The menu functionality will then internally create one card item for this deck.
+#   This is optional.
 
 #[menu card1]
 #type: card
@@ -179,6 +184,10 @@
 #   Card screen content. Each line represents display line.
 #   Quotes can be used in the beginning and end of line.
 #   Rendered elements are available for output formatting as {0}..{x}. It's always string type.
+#   It's possible directly use menu item names in content by leaving items attribute out or empty
+#   and use menu items names directly in content as {msg,xpos|ypos}. The menu functionality will then
+#   internally build a item list and replace names with indexes in content.
+#   This is optional.
 #items:
 #   List of elements in card. Each line represents a single index for content formatting.
 #   It's possible to show multiple elements in one place by separating them with comma on single line.

klippy/extras/display/menu.py

@@ -5,7 +5,7 @@
 # Copyright (C) 2018  Janar Sööt <janar.soot@gmail.com>
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
-import os, logging, sys, ast, re
+import os, logging, sys, ast, re, string
 
 
 class error(Exception):
@@ -573,7 +573,7 @@ class MenuGroup(MenuContainer):
         self._sep = sep
         self._show_back = False
         self.selected = None
-        self.items = config.get('items')
+        self.items = config.get('items', '')
 
     def is_accepted(self, item):
         return (super(MenuGroup, self).is_accepted(item)
@@ -739,7 +739,7 @@ class MenuList(MenuContainer):
         super(MenuList, self).__init__(manager, config, namespace)
         self._enter_gcode = config.get('enter_gcode', None)
         self._leave_gcode = config.get('leave_gcode', None)
-        self.items = config.get('items')
+        self.items = config.get('items', '')
 
     def is_accepted(self, item):
         return (super(MenuList, self).is_accepted(item)
@@ -799,6 +799,32 @@ class MenuCard(MenuGroup):
     def __init__(self, manager, config, namespace=''):
         super(MenuCard, self).__init__(manager, config, namespace)
         self.content = config.get('content')
+        if not self.items:
+            self.content = self._parse_content_items(self.content)
+
+    def _parse_content_items(self, content):
+        formatter = string.Formatter()
+        out = ""
+        items = []
+
+        try:
+            parsed_content = list(formatter.parse(content))
+        except Exception:
+            logging.exception("Card content parsing error")
+
+        for part in parsed_content:
+            # (literal_text, field_name, format_spec, conversion)
+            out += part[0]
+            if part[1]:
+                out += "{%s%s%s}" % (
+                    len(items),
+                    ("!" + part[3]) if part[3] else '',
+                    (":" + part[2]) if part[2] else '',
+                )
+                items.append(str(part[1]))
+
+        self.items = "\n".join(items)
+        return out
 
     def _names_aslist(self):
         return self._lines_aslist(self.items)
@@ -853,6 +879,18 @@ class MenuDeck(MenuList):
         self.menu = None
         self._show_back = False
         self._show_title = False
+        if not self.items:
+            card = MenuCard(self._manager, {
+                'name': ' '.join([self._name, 'Card']),
+                'use_cursor': config.get('use_cursor', 'false'),
+                'allow_without_selection': config.get(
+                    'allow_without_selection', 'true'),
+                'content': config.get('content')
+            }, self.namespace)
+            name = " ".join(
+                config.get_name().split()[1:]) + "__singlecarddeck__"
+            self._manager.add_menuitem(name, card)
+            self.items = name
 
     def _populate_menu(self):
         self.menu = None