Fixed overlay when inserting fast enough so backend can't keep up
Overlay was updated temporarily with a wrong text on insert command, so when the suggestion backend didn't keep up the suggestion was wrong. Refactored some code to have less repetition when setting overlay properties.master
parent
446f88ff78
commit
71bff98bd4
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@ -66,7 +66,7 @@
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'((t (:inherit 'corfu--candidate-overlay-face :underline t)))
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"Face used for the overlay when there is only one candidate.")
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(defun corfu--candiate-overlay-prepare (beg end)
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(defun corfu--candiate-overlay-prepare (position)
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"Sets the default properties of the candidates overlay.
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The overlay can be dismissed with a mouse click."
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(when (not corfu--candidate-overlay-map)
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@ -77,15 +77,23 @@
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(delete-overlay corfu--candidate-overlay))))
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(if corfu--candidate-overlay
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(move-overlay corfu--candidate-overlay end end)
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(move-overlay corfu--candidate-overlay position position)
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(progn
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(setq corfu--candidate-overlay (make-overlay end end nil))
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(setq corfu--candidate-overlay (make-overlay position position nil))
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;; priority of 1k is the value used by Corfu.
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(overlay-put corfu--candidate-overlay 'priority 1000))))
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(defun corfu--candidate-overlay-update (beg end prefix candidate how-many-candidates)
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(defun corfu--get-overlay-property (property)
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"Returns the value of overlays' property"
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(overlay-get corfu--candidate-overlay property))
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(defun corfu--set-overlay-property (property value)
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"Returns the value of overlays' property"
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(overlay-put corfu--candidate-overlay property value))
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(defun corfu--candidate-overlay-update (position prefix candidate how-many-candidates)
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"Updates the candidate overlay with the first candidate found by Corfu."
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(corfu--candiate-overlay-prepare beg end)
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(corfu--candiate-overlay-prepare position)
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(unless (string-empty-p candidate)
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(add-text-properties 0 1 '(cursor 1) candidate))
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@ -96,10 +104,11 @@
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;; keep-up. We will need to use those stored values then to still
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;; show the overlay with a meaningful suggestion
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;; (i.e. the last one found)
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(overlay-put corfu--candidate-overlay 'corfu-candidate candidate)
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(overlay-put corfu--candidate-overlay 'corfu-prefix prefix)
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(corfu--set-overlay-property 'corfu-candidate candidate)
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(corfu--set-overlay-property 'corfu-prefix prefix)
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(corfu--set-overlay-property 'corfu-count how-many-candidates)
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;; and here is the candidate string as it will be rendered by Emacs.
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(overlay-put corfu--candidate-overlay 'after-string
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(corfu--set-overlay-property 'after-string
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(propertize
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candidate
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'face (if (= how-many-candidates 1)
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@ -116,7 +125,7 @@
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;; would need to recreate the object on basically each keystroke
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;; and I don't like the perspective of it, would also flicker
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;; for sure - so we keep the one overlay and we clear the contents.
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(overlay-put corfu--candidate-overlay 'after-string "")))
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(corfu--set-overlay-property 'after-string "")))
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(defun corfu-show-candidate-overlay ()
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"Computes completion candidates just like Corfu and updats the candidate
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@ -163,8 +172,7 @@
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(string-prefix-p prefix candidate))
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;; and finally we update the overlay.
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(corfu--candidate-overlay-update
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beg
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end
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end ;; we anchor the overlay to the end position as cursor is there.
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prefix
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suffix
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how-many-candidates)
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@ -181,6 +189,8 @@
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;; We should not throw an error here, as Emacs will disable
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;; the hook if it fails with an error.
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(ignore-errors
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;; This condition look similar to one in the post-command hook but it does
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;; differ significantly -- this one is in part reversed and less strict.
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(let* ((is-insert-command
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(corfu--match-symbol-p corfu-auto-commands this-command))
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(is-delete-command
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@ -188,10 +198,13 @@
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(when (and
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;; we are not in minibuffer.
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(not (minibuffer-window-active-p (selected-window)))
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;; corfu menu shown
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(and (frame-live-p corfu--frame) (frame-visible-p corfu--frame))
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(not corfu-auto) ;; don't work with corfu-auto
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;; and the command is not one of insert or delete.
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(not (or
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is-insert-command
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is-delete-command)))
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is-delete-command)))
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(corfu-hide-candidate-overlay)))))
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(defun corfu--candidate-overlay-post-command ()
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@ -212,6 +225,9 @@
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(if (and
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;; we are not in minibuffer, as it looks awkward.
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(not (minibuffer-window-active-p (selected-window)))
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(not corfu-auto) ;; don't work with corfu-auto
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;; corfu menu needs to be hidden
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(not (and (frame-live-p corfu--frame) (frame-visible-p corfu--frame)))
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(not (and ;; do not update if the point have not moved.
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corfu--candidate-last-point
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(= corfu--candidate-last-point (point))))
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@ -236,45 +252,47 @@
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;; of updating the overlay -- but using the previous auto suggestion candidate.
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(when corfu--candidate-overlay ;; need overlay active
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(let* ((candidate
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(overlay-get corfu--candidate-overlay 'corfu-candidate))
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(corfu--get-overlay-property 'corfu-candidate))
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(prefix
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(overlay-get corfu--candidate-overlay 'corfu-prefix))
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(corfu--get-overlay-property 'corfu-prefix))
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(count
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(corfu--get-overlay-property 'corfu-count))
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(previous-text
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(overlay-get corfu--candidate-overlay 'after-string)))
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(corfu--get-overlay-property 'after-string)))
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;; We need to deal with the overlay and stored candidate differently
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;; when inserting and deleting (i.e. we need to shift one characte from or to
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;; prefix to/from candidate)
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(cond
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;; TODO: Delete character case should probably be moved to pre-command hook.
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;; TODO: Delete character case should probably be moved to pre-command hook?
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(is-delete-command
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(if (length> prefix 0)
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(progn
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;; we still have some characters present in the prefix,
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;; so we'll borrow one and move to the candidate.
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(overlay-put corfu--candidate-overlay 'corfu-candidate
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(concat candidate (substring prefix (- (length prefix) 1))))
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(overlay-put corfu--candidate-overlay 'corfu-prefix
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(substring prefix 0 (- (length prefix) 1 )))
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(overlay-put corfu--candidate-overlay 'after-string
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(concat candidate (substring prefix (- (length prefix) 1))))
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(move-overlay corfu--candidate-overlay (point) (point)))
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(corfu--candidate-overlay-update
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(point) ;; move to current cursor's position
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(substring prefix 0 (- (length prefix) 1 ))
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(concat (substring prefix (- (length prefix) 1)) candidate)
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count)
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;; if the length of prefix is zero then we can only hide
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;; the overlay as we are removing past the current word
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;; boundary.
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(corfu-hide-candidate-overlay)))
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(corfu-hide-candidate-overlay)))
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;; Inserting character - we still update using historical data
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;; in case the corfu backend would get interrupted;
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;; Here we "borrow" a character from the candidate and append it to the prefix.
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(is-insert-command
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(when (not (string-empty-p previous-text))
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(overlay-put corfu--candidate-overlay 'corfu-candidate
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(and (length> candidate 1) (substring candidate 1 (- (length candidate) 1))))
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(overlay-put corfu--candidate-overlay 'corfu-prefix
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(concat prefix (and (length> candidate 1) (substring candidate 0 1))))
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(overlay-put corfu--candidate-overlay 'after-string
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(substring previous-text 1)))))
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(move-overlay corfu--candidate-overlay (point) (point))))
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(if (and
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(not (string-empty-p previous-text))
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(length> candidate 1))
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(corfu--candidate-overlay-update
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(point) ;; move to current cursor's position
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(concat prefix (substring candidate 0 1))
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(substring candidate 1 (length candidate))
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count)
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;; no previous candidate or candidate is zero length,
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;; probably we have reached the end of suggested word,
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;; so let's hide the overlay.
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(corfu-hide-candidate-overlay))))))
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;; preserve the current position, show and update the overlay.
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;; the corfu-show-candidate-overlay CAN be interrupted, that's why
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;; we did the shuffling above.
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@ -289,10 +307,13 @@
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:global t
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:group 'corfu
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(if corfu-candidate-overlay-mode
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(progn
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(cond
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((not corfu-auto)
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(add-hook 'post-command-hook #'corfu--candidate-overlay-post-command)
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(add-hook 'pre-command-hook #'corfu--candidate-overlay-pre-command)
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(message "Enabled `corfu-candidate-overlay-mode'."))
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(t
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(message "`corfu-auto' enabled, `corfu-candidate-overlay-mode' requires `corfu-auto' to be set to `nil'.")))
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(progn
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(remove-hook 'post-command-hook #'corfu--candidate-overlay-post-command)
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(remove-hook 'pre-command-hook #'corfu--candidate-overlay-pre-command)
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