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https://github.com/joaotavora/yasnippet.git
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wip: still broken, but closer
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Joao Tavora
parent
7b7d2cea53
commit
c5f62d81ae
107
snippet.el
107
snippet.el
@ -76,7 +76,7 @@
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(`(&exit ,expr)
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`(&exit (&eval ,expr)))
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((or `&exit `(&exit))
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`(&exit nil))
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`(&exit (&eval nil)))
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((pred atom)
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`(&eval ,form))
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((pred consp)
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@ -84,10 +84,10 @@
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(t
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(error "invalid snippet form %s" form))))
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(defun snippet--unfold-forms (canonic-forms &optional parent-field-sym)
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(defun snippet--unfold-forms (canonic-forms &optional parent-sym)
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(cl-loop for form in canonic-forms
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collect (append form
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`((&parent ,parent-field-sym)))
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`((&parent ,parent-sym)))
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append (pcase form
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(`(&field ,name (&nested . ,subforms))
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(snippet--unfold-forms subforms
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@ -119,14 +119,15 @@
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(defun define--snippet-body (body)
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"Does the actual work for `define-snippet'"
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(let ((unfolded (snippet--unfold-forms body)))
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(let ((unfolded (snippet--unfold-forms
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(mapcar #'snippet--canonicalize-form body))))
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`(let* (,@(loop for form in unfolded
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append (pcase form
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(`(&field ,name ,_expr (&parent ,parent))
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`((,(snippet--make-field-sym name)
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(snippet--make-field :parent-field
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(snippet--make-field :parent
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,parent))))))
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(region-string (and (region-active-p)
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(region (and (region-active-p)
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(buffer-substring-no-properties
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(region-beginning)
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(region-end)))))
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@ -138,40 +139,43 @@
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with all-objects
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append
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(pcase form
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(`(&field ,name ,expr (&parent ,parent))
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(`(&field ,name ,expr (&parent ,_parent))
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(setq sym (snippet--make-field-sym name))
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`((,sym (snippet--insert-field
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,sym
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:prev ,prev-sym
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:parent ,parent
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:default ,(pcase expr
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,prev-sym
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,(pcase expr
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(`(&eval ,form)
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`(funcall ,(snippet--eval-lambda form)
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region-string)))))))
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(`(&mirror ,name ,_expr (&parent ,parent))
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(`(&mirror ,name ,transform (&parent ,parent))
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(setq sym (snippet--make-mirror-sym
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(cl-incf mirror-idx) name))
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`((,sym (snippet--make-and-insert-mirror
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:source ,(snippet--make-field-sym name)
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:parent ,parent
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:prev ,prev-sym))))
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(`(&exit ,_expr (&parent ,parent))
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,parent
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,prev-sym
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,(snippet--make-field-sym name)
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,(snippet--transform-lambda transform)))))
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(`(&exit (&eval ,form) (&parent ,parent))
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(setq sym (snippet--make-exit-sym))
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`((,sym (snippet--make-and-insert-exit
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:parent ,parent
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:prev ,prev-sym))))
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,parent
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,prev-sym
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,(and form
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`(funcall ,(snippet--eval-lambda form)
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region-string))))))
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(`(&eval ,form (&parent ,parent))
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`((,(cl-gensym "constant-")
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(snippet--insert-constant
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(funcall ,(snippet--eval-lambda form)
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region-string)
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:parent ,parent))))) into object-forms
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,parent)))))
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into object-forms
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when sym do
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(push sym all-objects)
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(setq prev-sym sym)
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(setq sym nil)
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finally
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(cl-return
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finally (cl-return
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(append object-forms
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`((all-objects ,all-objects)))))
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(sorted-fields ,(snippet--sorted-field-syms
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@ -284,7 +288,7 @@ meaning is not decided yet"
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;;;
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(cl-defstruct snippet--object
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start end parent-field next prev (buffer (current-buffer)))
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start end parent next prev (buffer (current-buffer)))
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(cl-defstruct (snippet--field (:constructor snippet--make-field-1)
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(:include snippet--object))
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@ -304,21 +308,52 @@ meaning is not decided yet"
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(let ((field (snippet--make-field-1 :parent parent)))
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field))
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(cl-defun snippet-insert-field (&rest args)
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)
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(defmacro snippet--inserting-object (object prev &rest body)
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(declare (indent defun) (debug (sexp sexp &rest form)))
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`(progn
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(cl-assert (null (snippet--object-next ,prev)) nil
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"previous object already has another sucessor")
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(setf (snippet--object-next ,prev) ,object)
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(setf (snippet--object-start ,object)
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(if (= (point) (snippet--object-end ,prev))
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(snippet--object-end ,prev)
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(point-marker)))
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,@body
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(setf (snippet--object-end ,object)
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(point-marker))
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(when (snippet--object-parent ,object)
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(setf (snippet--object-end
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(snippet--object-parent ,object))
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(snippet--object-end ,object)))))
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(cl-defun snippet--make-and-insert-mirror (&rest args)
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(let ((mirror (apply #'snippet--make-mirror-1 args)))
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(snippet--init-object mirror)
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(cl-assert (snippet--mirror-source mirror) nil
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"can't create mirror without source field")
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(pushnew mirror (snippet--field-mirrors (snippet--mirror-source mirror)))
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(defun snippet--insert-field (field prev default)
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(snippet--inserting-object field prev
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(when default
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(insert default))))
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(defun snippet--make-and-insert-mirror (parent prev source transform)
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(let ((mirror (snippet--make-mirror-1
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:parent parent
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:prev prev
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:source source
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:transform transform)))
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(snippet--inserting-object mirror prev
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(pushnew mirror (snippet--field-mirrors source))
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(setf (snippet--mirror-source mirror) source)
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(setf (snippet--mirror-transform mirror) transform))
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mirror))
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(defun snippet--make-exit (&rest args)
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(let ((exit (apply #'snippet--make-exit-1 args)))
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(snippet--init-object exit)
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exit))
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(defun snippet--make-and-insert-exit (parent prev constant)
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(let ((exit (snippet--make-exit-1 :parent parent :prev prev)))
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(snippet--inserting-object exit prev
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(when constant
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(insert constant)))))
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(defun snippet--insert-constant (constant parent)
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(when constant
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(insert constant))
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(when parent
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(setf (snippet--object-next parent) (point-marker))))
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(defun snippet--describe-field (field)
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(with-current-buffer (snippet--object-buffer field)
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@ -369,7 +404,7 @@ meaning is not decided yet"
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(defvar snippet--field-overlay nil)
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(defun snippet--field-skip-p (field)
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(let ((parent (snippet--field-parent-field field)))
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(let ((parent (snippet--field-parent field)))
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(and parent
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(snippet--object-empty-p field)
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(snippet--field-modified-p parent))))
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@ -468,8 +503,8 @@ meaning is not decided yet"
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(defun snippet--update-field-mirrors (field)
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(mapc #'snippet--update-mirror (snippet--field-mirrors field))
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(when (snippet--object-parent-field field)
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(snippet--update-field-mirrors (snippet--object-parent-field field))))
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(when (snippet--object-parent field)
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(snippet--update-field-mirrors (snippet--object-parent field))))
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(defun snippet--field-overlay-changed (overlay after? beg end
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&optional pre-change-len)
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