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81 lines
2.7 KiB
81 lines
2.7 KiB
(require 'slime)
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(require 'slime-parse)
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(define-slime-contrib slime-highlight-edits
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"Highlight edited, i.e. not yet compiled, code."
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(:authors "William Bland <doctorbill.news@gmail.com>")
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(:license "GPL")
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(:on-load (add-hook 'slime-mode-hook 'slime-activate-highlight-edits))
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(:on-unload (remove-hook 'slime-mode-hook 'slime-activate-highlight-edits)))
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(defun slime-activate-highlight-edits ()
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(slime-highlight-edits-mode 1))
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(defface slime-highlight-edits-face
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`((((class color) (background light))
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(:background "lightgray"))
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(((class color) (background dark))
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(:background "dimgray"))
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(t (:background "yellow")))
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"Face for displaying edit but not compiled code."
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:group 'slime-mode-faces)
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(define-minor-mode slime-highlight-edits-mode
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"Minor mode to highlight not-yet-compiled code." nil)
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(add-hook 'slime-highlight-edits-mode-on-hook
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'slime-highlight-edits-init-buffer)
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(add-hook 'slime-highlight-edits-mode-off-hook
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'slime-highlight-edits-reset-buffer)
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(defun slime-highlight-edits-init-buffer ()
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(make-local-variable 'after-change-functions)
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(add-to-list 'after-change-functions
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'slime-highlight-edits)
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(add-to-list 'slime-before-compile-functions
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'slime-highlight-edits-compile-hook))
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(defun slime-highlight-edits-reset-buffer ()
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(setq after-change-functions
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(remove 'slime-highlight-edits after-change-functions))
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(slime-remove-edits (point-min) (point-max)))
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;; FIXME: what's the LEN arg for?
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(defun slime-highlight-edits (beg end &optional len)
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(save-match-data
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(when (and (slime-connected-p)
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(not (slime-inside-comment-p))
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(not (slime-only-whitespace-p beg end)))
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(let ((overlay (make-overlay beg end)))
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(overlay-put overlay 'face 'slime-highlight-edits-face)
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(overlay-put overlay 'slime-edit t)))))
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(defun slime-remove-edits (start end)
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"Delete the existing Slime edit hilights in the current buffer."
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(save-excursion
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(goto-char start)
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(while (< (point) end)
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(dolist (o (overlays-at (point)))
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(when (overlay-get o 'slime-edit)
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(delete-overlay o)))
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(goto-char (next-overlay-change (point))))))
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(defun slime-highlight-edits-compile-hook (start end)
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(when slime-highlight-edits-mode
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(let ((start (save-excursion (goto-char start)
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(skip-chars-backward " \t\n\r")
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(point)))
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(end (save-excursion (goto-char end)
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(skip-chars-forward " \t\n\r")
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(point))))
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(slime-remove-edits start end))))
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(defun slime-only-whitespace-p (beg end)
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"Contains the region from BEG to END only whitespace?"
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(save-excursion
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(goto-char beg)
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(skip-chars-forward " \n\t\r" end)
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(<= end (point))))
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(provide 'slime-highlight-edits)
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