Display appropriate strings for shortcuts

example/layout/main.lua

@@ -7,9 +7,9 @@ return { id = 'mainWindow',
                 status = 'Quit the demo' },
         },
         { text = 'Edit',
-            { text = 'Cut', shortcut = 'ctrl-c' },
-            { text = 'Copy', shortcut = 'ctrl-x' },
-            { text = 'Paste', shortcut = 'ctrl-v' },
+            { text = 'Cut', shortcut = { 'win-ctrl-c', 'mac-gui-c' } },
+            { text = 'Copy', shortcut = 'c-x' },
+            { text = 'Paste', shortcut = { 'command-v', 'win-ctrl-v' } },
             { type = 'slider' },
         },
         { text = 'View',

luigi/shortcut.lua

@@ -15,18 +15,28 @@ local CTRL = 2
 local SHIFT = 4
 local GUI = 8
 
-function Shortcut.parseKeyCombo (value)
-    -- expand command- and option- aliases
-    value = value
+function Shortcut.appliesToPlatform (value)
+    if isMac and value:match '%f[%a]win%-'
+    or not isMac and value:match '%f[%a]mac%-' then
+        return false
+    end
+    return true
+end
+
+function Shortcut.expandAliases (value)
+    return value
         :gsub('%f[%a]command%-', 'mac-gui-')
         :gsub('%f[%a]option%-', 'mac-alt-')
+end
+
+function Shortcut.parseKeyCombo (value)
+    -- expand command- and option- aliases
+    value = Shortcut.expandAliases(value)
 
     -- exit early if shortcut is for different platform
-    if isMac and value:match 'win%-' or not isMac and value:match 'mac%-' then
-        return
-    end
+    if not Shortcut.appliesToPlatform(value) then return end
 
-    -- expand c- alias
+    -- expand c- special modifier
     if isMac then
         value = value:gsub('%f[%a]c%-', 'gui-')
     else
@@ -53,4 +63,28 @@ function Shortcut.getModifierFlags ()
     return alt + ctrl + shift + gui
 end
 
+function Shortcut.stringify (shortcut)
+    if type(shortcut) ~= 'table' then
+        shortcut = { shortcut }
+    end
+    for _, value in ipairs(shortcut) do
+        value = Shortcut.expandAliases(value)
+        if Shortcut.appliesToPlatform(value) then
+            if isMac then
+                value = value
+                    :gsub('%f[%a]c%-', 'command-')
+                    :gsub('%f[%a]gui%-', 'command-')
+                    :gsub('%f[%a]alt%-', 'option-')
+            else
+                value = value
+                    :gsub('%f[%a]c%-', 'ctrl-')
+                    :gsub('%f[%a]gui%-', 'windows-')
+            end
+            value = value:gsub('%f[%a]win%-', ''):gsub('%f[%a]mac%-', '')
+            value = value:gsub('%f[%w].', string.upper)
+            return value
+        end
+    end
+end
+
 return Shortcut

luigi/widget/menu/item.lua

@@ -10,6 +10,7 @@ not be explicitly created.
 local ROOT = (...):gsub('[^.]*.[^.]*.[^.]*$', '')
 
 local Backend = require(ROOT .. 'backend')
+local Shortcut = require(ROOT .. 'shortcut')
 
 local Layout, Event
 
@@ -176,9 +177,7 @@ local function initialize (self)
             shortcut = ' '
             edgeType = 'menu.expander'
         else
-            --TODO: only displays first of multiple shortcuts, change this?
-            if type(shortcut) == 'table' then shortcut = shortcut[1] end
-            shortcut = shortcut:gsub('%f[%w].', string.upper) -- :gsub('-', '+')
+            shortcut = Shortcut.stringify(shortcut)
         end
         self.height = font:getLineHeight() + pad * 2
         self.flow = 'x'