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* Cleaning up some code and preparing for complete snippet undo/redo,

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with nested snippets
This commit is contained in:
capitaomorte 2008-09-17 16:36:30 +00:00
parent aa75b00b55
commit 9aa2cc6486
1 changed files with 57 additions and 42 deletions
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99
yasnippet.el
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@ -298,9 +298,9 @@ set to t."
(id (yas/snippet-next-id) :read-only t)
(control-overlay nil)
(active-field-overlay nil)
undo-saved-info
(active-group nil)
(end-marker nil))
(end-marker nil)
saved-active-group)
(defstruct (yas/group (:constructor yas/make-group (primary-field snippet)))
"A group contains a list of field with the same number."
@ -309,7 +309,8 @@ set to t."
(next nil)
(prev nil)
snippet
(modified nil))
(modified nil)
saved-boundaries)
(defstruct (yas/field
(:constructor yas/make-field (start end number value transform parent-field)))
"A field in a snippet."
@ -593,7 +594,7 @@ of the primary field."
;; ;;
;; ;; Mark subgroups as `yas/group-deleted', so we're no longer
;; ;; able to move them. This action is undoable as long as
;; ;; `yas/undo-before-hook' exists in the `pre-command-hook'
;; ;; `yas/save-active-group-boundaries' exists in the `pre-command-hook'
;; ;; in the proper place.
;; ;;
;; (mapcar #'(lambda (group)
@ -905,8 +906,7 @@ placeholders."
bracket-end))
(defun yas/snippet-of-current-keymap (&optional point)
"Return the most recently inserted snippet holding covering
POINT."
"Return the most recently inserted snippet covering POINT."
(let ((point (or point (point)))
(keymap-snippet nil)
(snippet nil))
@ -1392,8 +1392,8 @@ up the snippet does not delete it!"
`post-command-hook' that should exist while at least one
registered snippet exists in the current buffer. Return snippet"
(puthash (yas/snippet-id snippet) snippet yas/registered-snippets)
(add-hook 'pre-command-hook 'yas/undo-before-hook 'append 'local)
(add-hook 'post-command-hook 'yas/undo-after-hook 'append 'local)
(add-hook 'pre-command-hook 'yas/save-active-group-boundaries 'append 'local)
(add-hook 'post-command-hook 'yas/save-active-group-boundaries-after 'append 'local)
(add-hook 'post-command-hook 'yas/check-cleanup-snippet 'append 'local)
;; DEBUG
(add-hook 'post-command-hook 'yas/debug-some-vars 'append 'local)
@ -1407,8 +1407,8 @@ current buffer."
(remhash (yas/snippet-id snippet) yas/registered-snippets)
(when (eq 0
(hash-table-count yas/registered-snippets))
(remove-hook 'pre-command-hook 'yas/undo-before-hook 'local)
(remove-hook 'post-command-hook 'yas/undo-after-hook 'local)
(remove-hook 'pre-command-hook 'yas/save-active-group-boundaries 'local)
(remove-hook 'post-command-hook 'yas/save-active-group-boundaries-after 'local)
(remove-hook 'post-command-hook 'yas/check-cleanup-snippet 'local)
;; DEBUG
(remove-hook 'post-command-hook 'yas/debug-some-vars 'local)))
@ -1505,43 +1505,58 @@ registered snippets last."
;;
;; ...
(defun yas/undo-before-hook ()
"..."
(let* ((snippet (yas/snippet-of-current-keymap))
(field-overlay (and snippet
(yas/snippet-active-field-overlay snippet))))
(when (and field-overlay
(overlay-buffer field-overlay))
(setf (yas/snippet-undo-saved-info snippet)
(list
;;
;; Save boundaries of current field
;;
(cons (overlay-start field-overlay)
(overlay-end field-overlay))
;;
;; Save a reference to current group
;;
(yas/snippet-active-group snippet))))))
(defun yas/save-active-group-boundaries ()
"While snippet is active, save the active group and the active group's boundaries.
(defun yas/undo-after-hook ()
"..."
(let* ((snippet (yas/snippet-of-current-keymap))
(saved-info (and snippet
(yas/snippet-undo-saved-info snippet))))
(unless (null saved-info)
(yas/push-undo-action-maybe (list 'yas/undo-restore-active-group
(second saved-info)
(car (first saved-info))
(cdr (first saved-info)))))))
This is stored in the `yas/group' itself.
(defun yas/undo-restore-active-group (group start end)
Intended to be placed in `pre-command-hook'."
(let* ((snippet (yas/snippet-of-current-keymap))
(group (yas/snippet-active-group snippet))
(field-overlay (yas/snippet-active-field-overlay snippet)))
;;
;; Save a reference to current group
;;
(setf (yas/snippet-saved-active-group snippet)
group)
;;
;; Save boundaries of current field
;;
(setf (yas/group-saved-boundaries group)
(cons (overlay-start field-overlay)
(overlay-end field-overlay)))))
(defun yas/save-active-group-boundaries-after ()
"..."
(let* ((snippet (yas/snippet-of-current-keymap))
(saved-group (yas/snippet-saved-active-group snippet))
(saved-boundaries (yas/group-saved-boundaries saved-group)))
;;
;; Push an action to restore the active group
;;
(yas/push-undo-action-maybe (list 'yas/restore-active-group
saved-group))
;;
;; Push an action after that to restore the active group's
;; boundaries
;;
(yas/push-undo-action-maybe (list 'yas/restore-active-group-boundaries
(car saved-boundaries)
(cdr saved-boundaries)))))
(defun yas/restore-active-group (group)
"..."
(let* ((snippet (yas/snippet-of-current-keymap))
(field-overlay (yas/snippet-active-field-overlay snippet))
(field (yas/group-primary-field group))
(inhibit-modification-hooks t))
(yas/move-to-group snippet group 'dontmove)
(yas/move-to-group snippet group 'dontmove)))
(defun yas/restore-active-group-boundaries (group)
",,,"
(let* ((snippet (yas/snippet-of-current-keymap))
(group (yas/snippet-active-group snippet))
(field-overlay (yas/snippet-active-field-overlay snippet))
(field (yas/group-primary-field group))
(inhibit-modification-hooks t))
(yas/move-overlay-and-field field-overlay field start end)
(yas/update-mirrors group)))