Autocompletion is particularly useful in writing CSS, to see the available options for a given property. Company provides company-minimum-prefix-length to control how many characters I have to type before it starts offering options.

However, I want completion without any characters, so I get this:

company mode completion of css

Currently, I can only get this by either:

  1. Explicitly calling M-x company-complete
  2. Setting (setq company-minimum-prefix-length 0), typing a single character and backspace, e.g. a DEL.

Is this possible? Ideally I'd be able to do it for both properties and their values.

  • The problem, though is that completion would always be on. It would be on for properties, and selectors at least. There are so many properties, that completion without a prefix would not be very helpful, and would just take up screen space. So do you want context-sensitive completion properties? – PythonNut May 16 '15 at 19:40
  • Yes, I suppose it's contextual: I though about advising self-insert-command to trigger completion on space, but that only helps for values. Though I think completion without prefix is useful, even for properties. (I learn more CSS and the dropdown shows more than 10 with a scrollbar). – Wilfred Hughes May 16 '15 at 23:38
  • "typing a single character and backspace" Why this? With company-minimum-prefix-length set to 0, you will already see the completion popup after typing space. Not after pressing return, though. – Dmitry Jun 17 '15 at 9:25
  • @Dmitry I'm not seeing that behaviour. What version of company are you using? – Wilfred Hughes Jun 17 '15 at 10:23
  • @WilfredHughes master. – Dmitry Jun 17 '15 at 11:30

I use TAB to trigger company-mode on demand in cases like that -- it works fine in your CSS example. I also use TAB to indent (tab-always-indent set to complete). You can integrate company with the built-in indent-for-tab-command using the configuration described here: https://github.com/company-mode/company-mode/issues/94#issuecomment-40884387

Here is the relevant code from the linked github comment:

(define-key company-mode-map [remap indent-for-tab-command]

(setq tab-always-indent 'complete)

(defvar completion-at-point-functions-saved nil)

(defun company-indent-for-tab-command (&optional arg)
  (interactive "P")
  (let ((completion-at-point-functions-saved completion-at-point-functions)
        (completion-at-point-functions '(company-complete-common-wrapper)))
    (indent-for-tab-command arg)))

(defun company-complete-common-wrapper ()
  (let ((completion-at-point-functions completion-at-point-functions-saved))

As of recent versions of company, this is the way to go:

(define-key company-mode-map [remap indent-for-tab-command] #'company-indent-or-complete-common)

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