Added in cut, copy and paste to the context menu. Also removed find pattern, as that's no longer a valid command. Also made it so commands only show up if their predicates are valid.

data/core/command.lua

@@ -41,6 +41,9 @@ function command.get_all_valid()
   return res
 end
 
+function command.is_valid(name, ...)
+  return command.map[name] and command.map[name].predicate(...)
+end
 
 local function perform(name, ...)
   local cmd = command.map[name]

data/core/commands/doc.lua

@@ -92,6 +92,21 @@ local function set_cursor(x, y, snap_type)
   core.blink_reset()
 end
 
+local selection_commands = {
+  ["doc:cut"] = function()
+    cut_or_copy(true)
+  end,
+
+  ["doc:copy"] = function()
+    cut_or_copy(false)
+  end,
+
+  ["doc:select-none"] = function()
+    local line, col = doc():get_selection()
+    doc():set_selection(line, col)
+  end
+}
+
 local commands = {
   ["doc:undo"] = function()
     doc():undo()
@@ -101,14 +116,6 @@ local commands = {
     doc():redo()
   end,
 
-  ["doc:cut"] = function()
-    cut_or_copy(true)
-  end,
-
-  ["doc:copy"] = function()
-    cut_or_copy(false)
-  end,
-
   ["doc:paste"] = function()
     local clipboard = system.get_clipboard()
     -- If the clipboard has changed since our last look, use that instead
@@ -173,11 +180,6 @@ local commands = {
     doc():set_selection(1, 1, math.huge, math.huge)
   end,
 
-  ["doc:select-none"] = function()
-    local line, col = doc():get_selection()
-    doc():set_selection(line, col)
-  end,
-
   ["doc:select-lines"] = function()
     for idx, line1, _, line2 in doc():get_selections(true) do
       append_line_if_last_line(line2)
@@ -481,3 +483,6 @@ commands["doc:move-to-next-char"] = function()
 end
 
 command.add("core.docview", commands)
+command.add(function()
+  return core.active_view:is(DocView) and core.active_view.doc:has_any_selection()
+end ,selection_commands)

data/core/contextmenu.lua

@@ -66,12 +66,16 @@ function ContextMenu:show(x, y)
   for _, items in ipairs(self.itemset) do
     if items.predicate(x, y) then
       items_list.width = math.max(items_list.width, items.items.width)
-      items_list.height = items_list.height + items.items.height
+      items_list.height = items_list.height
       for _, subitems in ipairs(items.items) do
+        if not subitems.command or command.is_valid(subitems.command) then
+          local lw, lh = get_item_size(subitems)
+          items_list.height = items_list.height + lh
           table.insert(items_list, subitems)
         end
       end
     end
+  end
 
   if #items_list > 0 then
     self.items = items_list

data/core/doc/init.lua

@@ -149,6 +149,13 @@ function Doc:has_selection()
   return line1 ~= line2 or col1 ~= col2
 end
 
+function Doc:has_any_selection()
+  for idx, line1, col1, line2, col2 in self:get_selections() do
+    if line1 ~= line2 or col1 ~= col2 then return true end
+  end
+  return false
+end
+
 function Doc:sanitize_selection()
   for idx, line1, col1, line2, col2 in self:get_selections() do
     self:set_selections(idx, line1, col1, line2, col2)

data/plugins/contextmenu.lua

@@ -62,15 +62,15 @@ menu:register("core.logview", {
 
 if require("plugins.scale") then
   menu:register("core.docview", {
+    { text = "Cut",         command = "doc:cut" },
+    { text = "Copy",        command = "doc:copy" },
+    { text = "Paste",       command = "doc:paste" },
     { text = "Font +",      command = "scale:increase" },
     { text = "Font -",      command = "scale:decrease" },
     { text = "Font Reset",  command = "scale:reset"    },
     ContextMenu.DIVIDER,
     { text = "Find",        command = "find-replace:find"    },
-    { text = "Replace",    command = "find-replace:replace" },
-    ContextMenu.DIVIDER,
-    { text = "Find Pattern",    command = "find-replace:find-pattern"    },
-    { text = "Replace Pattern", command = "find-replace:replace-pattern" },
+    { text = "Replace",     command = "find-replace:replace" }
   })
 end