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Refactor: remove horrible 'yas--trigger-key-for-fallback' and rework 'yas--fallback'

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João Távora 2012-08-22 22:56:30 +01:00
parent 9503c332f5
commit 38db5aa9fb
1 changed files with 39 additions and 31 deletions
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70
yasnippet.el
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@ -2257,18 +2257,15 @@ expand immediately. Common gateway for
end
(yas--template-expand-env yas--current-template)))))
(defun yas--trigger-key-for-fallback ()
;; When `yas-trigger-key' is <tab> it correctly overrides
;; org-mode's <tab>, for example and searching for fallbacks
;; correctly returns `org-cycle'. However, most other modes bind
;; "TAB" (which is translated from <tab>), and calling
;; (key-binding "TAB") does not place return that command into
;; our command-2 local. So we cheat.
;;
(if (string= yas-trigger-key "<tab>")
"TAB"
yas-trigger-key))
;; Apropos the trigger key and the fallback binding:
;;
;; When `yas-trigger-key' is <tab> it correctly overrides
;; org-mode's <tab>, for example and searching for fallbacks
;; correctly returns `org-cycle'. However, most other modes bind
;; "TAB" (which is translated from <tab>), and calling
;; (key-binding "TAB") does not place return that command into
;; our command-2 local. So we cheat.
;;
(defun yas--fallback (&optional from-trigger-key-p)
"Fallback after expansion has failed.
@ -2280,25 +2277,13 @@ Common gateway for `yas-expand-from-trigger-key' and
((eq yas-fallback-behavior 'call-other-command)
(let* ((yas-minor-mode nil)
(yas--direct-keymaps nil)
(yas-trigger-key (yas--trigger-key-for-fallback))
(keys-1 (this-command-keys-vector))
(keys-2 (and yas-trigger-key
from-trigger-key-p
(stringp yas-trigger-key)
(read-kbd-macro yas-trigger-key)))
(command-1 (and keys-1 (key-binding keys-1)))
(command-2 (and keys-2 (key-binding keys-2)))
;; An (ugly) safety: prevents infinite recursion of
;; yas-expand* calls.
(command (or (and (symbolp command-1)
(not (string-match "yas-expand" (symbol-name command-1)))
command-1)
(and (symbolp command-2)
command-2))))
(when (and (commandp command)
(not (string-match "yas-expand" (symbol-name command))))
(setq this-command command)
(call-interactively command))))
(keys (this-single-command-keys))
(beyond-yasnippet (or (key-binding keys t)
(key-binding (yas--fallback-translate-input keys) t))))
(yas--message 4 "Falling back to %s" beyond-yasnippet)
(when (commandp beyond-yasnippet)
(setq this-original-command beyond-yasnippet)
(call-interactively beyond-yasnippet))))
((and (listp yas-fallback-behavior)
(cdr yas-fallback-behavior)
(eq 'apply (car yas-fallback-behavior)))
@ -2312,6 +2297,29 @@ Common gateway for `yas-expand-from-trigger-key' and
;; also return nil if all the other fallbacks have failed
nil)))
(defun yas--fallback-translate-input (keys)
"Emulate `read-key-sequence', at least what I think it does.
Keys should be an untranslated key vector. Returns a translated
vector of keys. XXX not working yet"
(let ((retval [])
(i 0))
(while (< i (length keys))
(let ((j i)
(translated local-function-key-map))
(while (and (< j (length keys))
translated
(keymapp translated))
(setq translated (aget (remove 'keymap translated) (aref keys j))
j (1+ j)))
(setq retval (vconcat retval (cond ((symbolp translated)
`[,translated])
((vectorp translated)
translated)
(t
(substring keys i j)))))
(setq i j)))
retval))
;;; Utils for snippet development: