25개 이상의 토픽을 선택하실 수 없습니다.
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
332 lines
12 KiB
332 lines
12 KiB
;; Pretty printer patch for SBCL, which adds the "annotations" feature
|
|
;; required for sending presentations through pretty-printing streams.
|
|
;;
|
|
;; The section marked "Changed functions" and the DEFSTRUCT
|
|
;; PRETTY-STREAM are based on SBCL's pprint.lisp.
|
|
;;
|
|
;; Public domain.
|
|
|
|
(in-package "SB!PRETTY")
|
|
|
|
(defstruct (annotation (:include queued-op))
|
|
(handler (constantly nil) :type function)
|
|
(record))
|
|
|
|
|
|
(defstruct (pretty-stream (:include sb!kernel:ansi-stream
|
|
(out #'pretty-out)
|
|
(sout #'pretty-sout)
|
|
(misc #'pretty-misc))
|
|
(:constructor make-pretty-stream (target))
|
|
(:copier nil))
|
|
;; Where the output is going to finally go.
|
|
(target (missing-arg) :type stream)
|
|
;; Line length we should format to. Cached here so we don't have to keep
|
|
;; extracting it from the target stream.
|
|
(line-length (or *print-right-margin*
|
|
(sb!impl::line-length target)
|
|
default-line-length)
|
|
:type column)
|
|
;; A simple string holding all the text that has been output but not yet
|
|
;; printed.
|
|
(buffer (make-string initial-buffer-size) :type (simple-array character (*)))
|
|
;; The index into BUFFER where more text should be put.
|
|
(buffer-fill-pointer 0 :type index)
|
|
;; Whenever we output stuff from the buffer, we shift the remaining noise
|
|
;; over. This makes it difficult to keep references to locations in
|
|
;; the buffer. Therefore, we have to keep track of the total amount of
|
|
;; stuff that has been shifted out of the buffer.
|
|
(buffer-offset 0 :type posn)
|
|
;; The column the first character in the buffer will appear in. Normally
|
|
;; zero, but if we end up with a very long line with no breaks in it we
|
|
;; might have to output part of it. Then this will no longer be zero.
|
|
(buffer-start-column (or (sb!impl::charpos target) 0) :type column)
|
|
;; The line number we are currently on. Used for *PRINT-LINES*
|
|
;; abbreviations and to tell when sections have been split across
|
|
;; multiple lines.
|
|
(line-number 0 :type index)
|
|
;; the value of *PRINT-LINES* captured at object creation time. We
|
|
;; use this, instead of the dynamic *PRINT-LINES*, to avoid
|
|
;; weirdness like
|
|
;; (let ((*print-lines* 50))
|
|
;; (pprint-logical-block ..
|
|
;; (dotimes (i 10)
|
|
;; (let ((*print-lines* 8))
|
|
;; (print (aref possiblybigthings i) prettystream)))))
|
|
;; terminating the output of the entire logical blockafter 8 lines.
|
|
(print-lines *print-lines* :type (or index null) :read-only t)
|
|
;; Stack of logical blocks in effect at the buffer start.
|
|
(blocks (list (make-logical-block)) :type list)
|
|
;; Buffer holding the per-line prefix active at the buffer start.
|
|
;; Indentation is included in this. The length of this is stored
|
|
;; in the logical block stack.
|
|
(prefix (make-string initial-buffer-size) :type (simple-array character (*)))
|
|
;; Buffer holding the total remaining suffix active at the buffer start.
|
|
;; The characters are right-justified in the buffer to make it easier
|
|
;; to output the buffer. The length is stored in the logical block
|
|
;; stack.
|
|
(suffix (make-string initial-buffer-size) :type (simple-array character (*)))
|
|
;; Queue of pending operations. When empty, HEAD=TAIL=NIL. Otherwise,
|
|
;; TAIL holds the first (oldest) cons and HEAD holds the last (newest)
|
|
;; cons. Adding things to the queue is basically (setf (cdr head) (list
|
|
;; new)) and removing them is basically (pop tail) [except that care must
|
|
;; be taken to handle the empty queue case correctly.]
|
|
(queue-tail nil :type list)
|
|
(queue-head nil :type list)
|
|
;; Block-start queue entries in effect at the queue head.
|
|
(pending-blocks nil :type list)
|
|
;; Queue of annotations to the buffer
|
|
(annotations-tail nil :type list)
|
|
(annotations-head nil :type list))
|
|
|
|
|
|
(defmacro enqueue (stream type &rest args)
|
|
(let ((constructor (intern (concatenate 'string
|
|
"MAKE-"
|
|
(symbol-name type))
|
|
"SB-PRETTY")))
|
|
(once-only ((stream stream)
|
|
(entry `(,constructor :posn
|
|
(index-posn
|
|
(pretty-stream-buffer-fill-pointer
|
|
,stream)
|
|
,stream)
|
|
,@args))
|
|
(op `(list ,entry))
|
|
(head `(pretty-stream-queue-head ,stream)))
|
|
`(progn
|
|
(if ,head
|
|
(setf (cdr ,head) ,op)
|
|
(setf (pretty-stream-queue-tail ,stream) ,op))
|
|
(setf (pretty-stream-queue-head ,stream) ,op)
|
|
,entry))))
|
|
|
|
;;;
|
|
;;; New helper functions
|
|
;;;
|
|
|
|
(defun enqueue-annotation (stream handler record)
|
|
(enqueue stream annotation :handler handler
|
|
:record record))
|
|
|
|
(defun re-enqueue-annotation (stream annotation)
|
|
(let* ((annotation-cons (list annotation))
|
|
(head (pretty-stream-annotations-head stream)))
|
|
(if head
|
|
(setf (cdr head) annotation-cons)
|
|
(setf (pretty-stream-annotations-tail stream) annotation-cons))
|
|
(setf (pretty-stream-annotations-head stream) annotation-cons)
|
|
nil))
|
|
|
|
(defun re-enqueue-annotations (stream end)
|
|
(loop for tail = (pretty-stream-queue-tail stream) then (cdr tail)
|
|
while (and tail (not (eql (car tail) end)))
|
|
when (annotation-p (car tail))
|
|
do (re-enqueue-annotation stream (car tail))))
|
|
|
|
(defun dequeue-annotation (stream &key end-posn)
|
|
(let ((next-annotation (car (pretty-stream-annotations-tail stream))))
|
|
(when next-annotation
|
|
(when (or (not end-posn)
|
|
(<= (annotation-posn next-annotation) end-posn))
|
|
(pop (pretty-stream-annotations-tail stream))
|
|
(unless (pretty-stream-annotations-tail stream)
|
|
(setf (pretty-stream-annotations-head stream) nil))
|
|
next-annotation))))
|
|
|
|
(defun invoke-annotation (stream annotation truncatep)
|
|
(let ((target (pretty-stream-target stream)))
|
|
(funcall (annotation-handler annotation)
|
|
(annotation-record annotation)
|
|
target
|
|
truncatep)))
|
|
|
|
(defun output-buffer-with-annotations (stream end)
|
|
(let ((target (pretty-stream-target stream))
|
|
(buffer (pretty-stream-buffer stream))
|
|
(end-posn (index-posn end stream))
|
|
(start 0))
|
|
(loop
|
|
for annotation = (dequeue-annotation stream :end-posn end-posn)
|
|
while annotation
|
|
do
|
|
(let ((annotation-index (posn-index (annotation-posn annotation)
|
|
stream)))
|
|
(when (> annotation-index start)
|
|
(write-string buffer target :start start
|
|
:end annotation-index)
|
|
(setf start annotation-index))
|
|
(invoke-annotation stream annotation nil)))
|
|
(when (> end start)
|
|
(write-string buffer target :start start :end end))))
|
|
|
|
(defun flush-annotations (stream end truncatep)
|
|
(let ((end-posn (index-posn end stream)))
|
|
(loop
|
|
for annotation = (dequeue-annotation stream :end-posn end-posn)
|
|
while annotation
|
|
do (invoke-annotation stream annotation truncatep))))
|
|
|
|
;;;
|
|
;;; Changed functions
|
|
;;;
|
|
|
|
(defun maybe-output (stream force-newlines-p)
|
|
(declare (type pretty-stream stream))
|
|
(let ((tail (pretty-stream-queue-tail stream))
|
|
(output-anything nil))
|
|
(loop
|
|
(unless tail
|
|
(setf (pretty-stream-queue-head stream) nil)
|
|
(return))
|
|
(let ((next (pop tail)))
|
|
(etypecase next
|
|
(newline
|
|
(when (ecase (newline-kind next)
|
|
((:literal :mandatory :linear) t)
|
|
(:miser (misering-p stream))
|
|
(:fill
|
|
(or (misering-p stream)
|
|
(> (pretty-stream-line-number stream)
|
|
(logical-block-section-start-line
|
|
(first (pretty-stream-blocks stream))))
|
|
(ecase (fits-on-line-p stream
|
|
(newline-section-end next)
|
|
force-newlines-p)
|
|
((t) nil)
|
|
((nil) t)
|
|
(:dont-know
|
|
(return))))))
|
|
(setf output-anything t)
|
|
(output-line stream next)))
|
|
(indentation
|
|
(unless (misering-p stream)
|
|
(set-indentation stream
|
|
(+ (ecase (indentation-kind next)
|
|
(:block
|
|
(logical-block-start-column
|
|
(car (pretty-stream-blocks stream))))
|
|
(:current
|
|
(posn-column
|
|
(indentation-posn next)
|
|
stream)))
|
|
(indentation-amount next)))))
|
|
(block-start
|
|
(ecase (fits-on-line-p stream (block-start-section-end next)
|
|
force-newlines-p)
|
|
((t)
|
|
;; Just nuke the whole logical block and make it look like one
|
|
;; nice long literal. (But don't nuke annotations.)
|
|
(let ((end (block-start-block-end next)))
|
|
(expand-tabs stream end)
|
|
(re-enqueue-annotations stream end)
|
|
(setf tail (cdr (member end tail)))))
|
|
((nil)
|
|
(really-start-logical-block
|
|
stream
|
|
(posn-column (block-start-posn next) stream)
|
|
(block-start-prefix next)
|
|
(block-start-suffix next)))
|
|
(:dont-know
|
|
(return))))
|
|
(block-end
|
|
(really-end-logical-block stream))
|
|
(tab
|
|
(expand-tabs stream next))
|
|
(annotation
|
|
(re-enqueue-annotation stream next))))
|
|
(setf (pretty-stream-queue-tail stream) tail))
|
|
output-anything))
|
|
|
|
(defun output-line (stream until)
|
|
(declare (type pretty-stream stream)
|
|
(type newline until))
|
|
(let* ((target (pretty-stream-target stream))
|
|
(buffer (pretty-stream-buffer stream))
|
|
(kind (newline-kind until))
|
|
(literal-p (eq kind :literal))
|
|
(amount-to-consume (posn-index (newline-posn until) stream))
|
|
(amount-to-print
|
|
(if literal-p
|
|
amount-to-consume
|
|
(let ((last-non-blank
|
|
(position #\space buffer :end amount-to-consume
|
|
:from-end t :test #'char/=)))
|
|
(if last-non-blank
|
|
(1+ last-non-blank)
|
|
0)))))
|
|
(output-buffer-with-annotations stream amount-to-print)
|
|
(flush-annotations stream amount-to-consume nil)
|
|
(let ((line-number (pretty-stream-line-number stream)))
|
|
(incf line-number)
|
|
(when (and (not *print-readably*)
|
|
(pretty-stream-print-lines stream)
|
|
(>= line-number (pretty-stream-print-lines stream)))
|
|
(write-string " .." target)
|
|
(flush-annotations stream
|
|
(pretty-stream-buffer-fill-pointer stream)
|
|
t)
|
|
(let ((suffix-length (logical-block-suffix-length
|
|
(car (pretty-stream-blocks stream)))))
|
|
(unless (zerop suffix-length)
|
|
(let* ((suffix (pretty-stream-suffix stream))
|
|
(len (length suffix)))
|
|
(write-string suffix target
|
|
:start (- len suffix-length)
|
|
:end len))))
|
|
(throw 'line-limit-abbreviation-happened t))
|
|
(setf (pretty-stream-line-number stream) line-number)
|
|
(write-char #\newline target)
|
|
(setf (pretty-stream-buffer-start-column stream) 0)
|
|
(let* ((fill-ptr (pretty-stream-buffer-fill-pointer stream))
|
|
(block (first (pretty-stream-blocks stream)))
|
|
(prefix-len
|
|
(if literal-p
|
|
(logical-block-per-line-prefix-end block)
|
|
(logical-block-prefix-length block)))
|
|
(shift (- amount-to-consume prefix-len))
|
|
(new-fill-ptr (- fill-ptr shift))
|
|
(new-buffer buffer)
|
|
(buffer-length (length buffer)))
|
|
(when (> new-fill-ptr buffer-length)
|
|
(setf new-buffer
|
|
(make-string (max (* buffer-length 2)
|
|
(+ buffer-length
|
|
(floor (* (- new-fill-ptr buffer-length)
|
|
5)
|
|
4)))))
|
|
(setf (pretty-stream-buffer stream) new-buffer))
|
|
(replace new-buffer buffer
|
|
:start1 prefix-len :start2 amount-to-consume :end2 fill-ptr)
|
|
(replace new-buffer (pretty-stream-prefix stream)
|
|
:end1 prefix-len)
|
|
(setf (pretty-stream-buffer-fill-pointer stream) new-fill-ptr)
|
|
(incf (pretty-stream-buffer-offset stream) shift)
|
|
(unless literal-p
|
|
(setf (logical-block-section-column block) prefix-len)
|
|
(setf (logical-block-section-start-line block) line-number))))))
|
|
|
|
(defun output-partial-line (stream)
|
|
(let* ((fill-ptr (pretty-stream-buffer-fill-pointer stream))
|
|
(tail (pretty-stream-queue-tail stream))
|
|
(count
|
|
(if tail
|
|
(posn-index (queued-op-posn (car tail)) stream)
|
|
fill-ptr))
|
|
(new-fill-ptr (- fill-ptr count))
|
|
(buffer (pretty-stream-buffer stream)))
|
|
(when (zerop count)
|
|
(error "Output-partial-line called when nothing can be output."))
|
|
(output-buffer-with-annotations stream count)
|
|
(incf (pretty-stream-buffer-start-column stream) count)
|
|
(replace buffer buffer :end1 new-fill-ptr :start2 count :end2 fill-ptr)
|
|
(setf (pretty-stream-buffer-fill-pointer stream) new-fill-ptr)
|
|
(incf (pretty-stream-buffer-offset stream) count)))
|
|
|
|
(defun force-pretty-output (stream)
|
|
(maybe-output stream nil)
|
|
(expand-tabs stream nil)
|
|
(re-enqueue-annotations stream nil)
|
|
(output-buffer-with-annotations stream
|
|
(pretty-stream-buffer-fill-pointer stream)))
|
|
|