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;;; (c) copyright 1998,1999,2000,2001 by Michael McDonald (mikemac@mikemac.com)
;;; (c) copyright 2000 by
;;; Robert Strandh (strandh@labri.u-bordeaux.fr)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-internals)
;;; Note: in the methods defined on output streams, I often use
;;; the sheet's medium as the argument to the draw-* routines.
;;; This is so that they don't get recorded if the stream also
;;; happens to be an output-recording-stream. - MikeMac 1/7/99
;;; Standard-Output-Stream class
(defclass standard-output-stream (fundamental-character-output-stream)
())
(defmethod stream-recording-p ((stream t)) nil)
(defmethod stream-drawing-p ((stream t)) t)
#+ignore(defmethod stream-write-char ((stream standard-output-stream) char)
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(cond
((eq char #\Newline)
(setf (stream-cursor-position stream)
(value 0
(+ cy
(stream-line-height stream)
(stream-vertical-spacing stream)))))
(t
(draw-text* (sheet-medium stream) char cx (+ cy (stream-baseline stream)))
(setf (stream-cursor-position stream)
(values (+ cx (stream-character-width stream char)) cy))))))
;;; Cursor class
(defgeneric* (setf cursor-position) (x y cursor))
;;; Cursor-Mixin class
(defclass cursor-mixin ()
((sheet :initarg :sheet
:reader cursor-sheet)
(x :initform 0 :initarg :x-position)
(y :initform 0 :initarg :y-position)
(width :initform 8)
(appearance :type (member :solid :hollow)
:initarg :appearance :initform :hollow
:accessor cursor-appearance)
;; XXX what does "cursor is active" mean?
;; It means that the sheet (stream) updates the cursor, though
;; currently the cursor appears to be always updated after stream
;; text operations. -- moore
(cursor-active :initform nil
:accessor cursor-active)
(cursor-state :initform nil
:accessor cursor-state)))
(defgeneric cursor-height (cursor))
(defmethod print-object ((cursor cursor-mixin) stream)
(with-slots (x y) cursor
(print-unreadable-object (cursor stream :type t :identity t)
(format stream "~D ~D " x y))))
;;; XXX What to do when we can't draw the cursor immediately (like,
;;; we're not drawing?) The whole flip-screen-cursor idea breaks down.
(defmethod (setf cursor-state) :around (state (cursor cursor-mixin))
(unless (eq state (slot-value cursor 'cursor-state))
(flip-screen-cursor cursor))
(call-next-method))
(defun decode-cursor-visibility (visibility)
"Given :on, :off, or nil, returns the needed active and state attributes for the cursor."
(ecase visibility
((:on t) (values t t))
(:off (values t nil))
((nil) (values nil nil))))
(defmethod cursor-visibility ((cursor cursor-mixin))
(let ((a (cursor-active cursor))
(s (cursor-state cursor)))
(cond ((and a s) :on)
((and a (not s)) :off)
(t nil))))
(defmethod (setf cursor-visibility) (nv (cursor cursor-mixin))
(multiple-value-bind (active state)
(decode-cursor-visibility nv)
(setf (cursor-state cursor) state
(cursor-active cursor) active)))
(defmethod cursor-position ((cursor cursor-mixin))
(with-slots (x y) cursor
(values x y)))
(defmethod* (setf cursor-position) (nx ny (cursor cursor-mixin))
(with-slots (x y) cursor
(letf (((cursor-state cursor) nil))
(multiple-value-prog1
(setf (values x y) (values nx ny))))
(when (and (cursor-active cursor)
(output-recording-stream-p (cursor-sheet cursor)))
(stream-close-text-output-record (cursor-sheet cursor)))))
(defmethod flip-screen-cursor ((cursor cursor-mixin))
(when (stream-drawing-p (cursor-sheet cursor))
(with-slots (x y sheet width) cursor
(let ((height (cursor-height cursor)))
(draw-rectangle* (sheet-medium (cursor-sheet cursor))
x y
(+ x width) (+ y height)
:filled (ecase (cursor-appearance cursor)
(:solid t) (:hollow nil))
:ink +flipping-ink+)))))
(defmethod display-cursor ((cursor cursor-mixin) state)
(unless (stream-drawing-p (cursor-sheet cursor))
(return-from display-cursor nil))
(with-slots (x y sheet width) cursor
(let ((height (cursor-height cursor)))
(case state
(:draw (draw-rectangle* (sheet-medium (cursor-sheet cursor))
x y
(+ x width) (+ y height)
:filled (ecase (cursor-appearance cursor)
(:solid t) (:hollow nil))
:ink +foreground-ink+
))
(:erase
;; This is how I'd like this to work, as painting over with the background
;; ink is repugnant. I leave this disabled because I'm concerned about
;; infinite recursion if replay-output-record calls here (which Goatee
;; does currently). --Hefner
#+nil (repaint-sheet (cursor-sheet cursor)
(make-bounding-rectangle x y (+ 1 x width)
(+ 1 y height)))
(draw-rectangle* (sheet-medium (cursor-sheet cursor))
x y
(+ x width) (+ y height)
:filled (ecase (cursor-appearance cursor)
(:solid t) (:hollow nil))
:ink +background-ink+))))))
;;; Standard-Text-Cursor class
(defclass standard-text-cursor (cursor-mixin cursor)
())
(defmethod cursor-height ((cursor standard-text-cursor))
(slot-value (cursor-sheet cursor) 'height))
;;; Extended-Output-Stream class
(defgeneric* (setf stream-cursor-position) (x y stream))
;;; Standard-Extended-Output-Stream class
(defclass standard-extended-output-stream (extended-output-stream
standard-output-stream)
((cursor :accessor stream-text-cursor)
(foreground :initarg :foreground :reader stream-foreground)
(background :initarg :background :reader stream-background)
(text-style :initarg :text-style :reader stream-text-style)
(vspace :initarg :vertical-spacing :reader stream-vertical-spacing)
(margin :initarg :text-margin :writer (setf stream-text-margin))
(eol :initarg :end-of-line-action :accessor stream-end-of-line-action)
(eop :initarg :end-of-page-action :accessor stream-end-of-page-action)
(view :initarg :default-view :accessor stream-default-view)
(baseline :initform 0 :reader stream-baseline)
;; What is this? --GB
(height :initform 0)
;; When the stream takes part in the space alloction protocol, this
;; remembers our demand:
(seos-current-width :initform 0)
(seos-current-height :initform 0))
(:default-initargs
:foreground +black+ :background +white+ :text-style *default-text-style*
:vertical-spacing 2 :text-margin nil :end-of-line-action :wrap
:end-of-page-action :scroll :default-view +textual-view+))
(defmethod stream-force-output :after ((stream
standard-extended-output-stream))
(with-sheet-medium (medium stream)
(medium-force-output medium)))
(defmethod stream-finish-output :after ((stream
standard-extended-output-stream))
(with-sheet-medium (medium stream)
(medium-finish-output medium)))
(defmethod compose-space ((pane standard-extended-output-stream) &key width height)
(declare (ignorable width height))
(with-slots (seos-current-width seos-current-height) pane
(make-space-requirement :width seos-current-width
:height seos-current-height)))
(defmethod initialize-instance :after
((stream standard-extended-output-stream) &rest args)
(declare (ignore args))
(setf (stream-text-cursor stream)
(make-instance 'standard-text-cursor :sheet stream))
(setf (cursor-active (stream-text-cursor stream)) t))
(defmethod stream-cursor-position ((stream standard-extended-output-stream))
(cursor-position (stream-text-cursor stream)))
(defmethod* (setf stream-cursor-position) (x y (stream standard-extended-output-stream))
(setf (cursor-position (stream-text-cursor stream)) (values x y)))
(defmethod stream-set-cursor-position ((stream standard-extended-output-stream) x y)
(setf (stream-cursor-position stream) (values x y)))
(defmethod stream-increment-cursor-position ((stream standard-extended-output-stream) dx dy)
(multiple-value-bind (x y) (cursor-position (stream-text-cursor stream))
(let ((dx (or dx 0))
(dy (or dy 0)))
(setf (cursor-position (stream-text-cursor stream)) (values (+ x dx) (+ y dy))))))
;;;
(defmethod handle-repaint :around ((stream standard-extended-output-stream)
region)
(declare (ignorable region))
(let ((cursor (stream-text-cursor stream)))
(if (cursor-state cursor)
;; Erase the cursor so that the subsequent flip operation will make a
;; cursor, whether or not the next-method erases the location of the
;; cursor.
;; XXX clip to region? No one else seems to...
;; Sure clip to region! --GB
(letf (((cursor-state cursor) nil))
(call-next-method))
(call-next-method))))
(defmethod scroll-vertical ((stream standard-extended-output-stream) dy)
(multiple-value-bind (tx ty) (bounding-rectangle-position (sheet-region stream))
(scroll-extent stream tx (+ ty dy))))
(defmethod scroll-horizontal ((stream standard-extended-output-stream) dx)
(multiple-value-bind (tx ty) (bounding-rectangle-position (sheet-region stream))
(scroll-extent stream (+ tx dx) ty)))
(defmacro with-cursor-off (stream &body body)
`(letf (((cursor-visibility (stream-text-cursor ,stream)) nil))
,@body))
(defmethod stream-wrap-line ((stream standard-extended-output-stream))
(let ((margin (stream-text-margin stream)))
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(declare (ignore cx))
(draw-rectangle* (sheet-medium stream) margin cy (+ margin 4) (+ cy (slot-value stream 'height))
:ink +foreground-ink+
:filled t)))
(stream-write-char stream #\newline))
(defun seos-write-string (stream string &optional (start 0) end)
(let* ((medium (sheet-medium stream))
(text-style (medium-text-style medium))
(new-baseline (text-style-ascent text-style medium))
(new-height (text-style-height text-style medium))
(margin (stream-text-margin stream))
(end (or end (length string))))
(flet ((find-split (delta) ;; FIXME: This can be done smarter.
(loop for i from (1+ start) upto end
as sub-width = (stream-string-width stream string
:start start :end i
:text-style text-style)
while (<= sub-width delta)
finally (return (1- i)))))
(when (eql end 0)
(return-from seos-write-string))
(with-slots (baseline height vspace) stream
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(when (> new-baseline baseline)
;;(when (or (> baseline 0)
;; (> height 0))
;; (scroll-vertical stream (- new-baseline baseline))
;; ) ; the beginning of the line should be moved down, but not the whole stream -- APD, 2002-06-18
(setq baseline new-baseline))
(if (> new-height height)
(setq height new-height))
(let ((width (stream-string-width stream string
:start start :end end
:text-style text-style))
(split end))
(when (>= (+ cx width) margin)
(ecase (stream-end-of-line-action stream)
(:wrap
;; Let's prevent infinite recursion if there isn't
;; room for even a single character.
(setq split (max (find-split (- margin cx))
(1+ start))))
(:scroll
(scroll-horizontal stream width))
(:allow)))
(unless (= start split)
(stream-write-output stream
string
nil
start split)
(setq cx (+ cx width))
(with-slots (x y) (stream-text-cursor stream)
(setf x cx y cy)))
(when (/= split end)
(let ((current-baseline baseline))
(setf baseline current-baseline))
; (stream-wrap-line stream)
; (multiple-value-bind (new-cx new-cy) (stream-cursor-position stream)
; (setf cx new-cx
; cy new-cy
; baseline current-baseline)
; (setf (stream-cursor-position stream) (values cx cy))))
(stream-wrap-line stream)
(seos-write-string stream string split end))
))))))
(defun seos-write-newline (stream)
(let ((medium (sheet-medium stream))
(%view-height (bounding-rectangle-height
(or (pane-viewport stream)
stream)))
(view-height (bounding-rectangle-height stream)))
(with-slots (baseline height vspace) stream
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(setf height (max height (text-style-height (medium-text-style medium) medium)))
(setf cx 0
cy (+ cy height vspace))
(when (> (+ cy height) view-height)
(ecase (stream-end-of-page-action stream)
((:scroll :allow)
(change-space-requirements stream
:width (bounding-rectangle-width stream)
:height (+ cy height))
;;(scroll-vertical stream (+ height vspace))
)
(:wrap
(setq cy 0))))
(unless (eq :allow (stream-end-of-page-action stream))
(scroll-extent stream 0 (max 0 (- (+ cy height) %view-height))))
;; mikemac says that this "erase the new line" behavior is
;; required by the stream text protocol, but I don't see
;; it. I'm happy to put this back in again, but in the
;; meantime it makes debugging of updating-output a bit easier
;; not to have "extra" records laying around. If/When it goes
;; back in... the draw-rectangle has to happen on the stream,
;; not the medium. -- moore
#+nil(draw-rectangle* medium cx cy (+ margin 4) (+ cy height)
:ink +background-ink+
:filled t)
(setq baseline 0
height 0)
(setf (stream-cursor-position stream) (values cx cy))))))
(defgeneric stream-write-output (stream line string-width &optional start end)
(:documentation
"Writes the character or string LINE to STREAM. This function produces no
more than one line of output i.e., doesn't wrap. If STRING-WIDTH is
non-nil, that is used as the width where needed; otherwise
STREAM-STRING-WIDTH will be called."))
;;; The cursor is in stream coordinates.
(defmethod stream-write-output (stream line string-width
&optional (start 0) end)
(declare (ignore string-width))
(with-slots (baseline vspace) stream
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(draw-text* (sheet-medium stream) line
cx (+ cy baseline)
:transformation +identity-transformation+
:start start :end end))))
(defmethod stream-write-char ((stream standard-extended-output-stream) char)
(with-cursor-off stream
(if (char= #\Newline char)
(seos-write-newline stream)
(seos-write-string stream (string char)))))
;;; I added the (subseq string seg-start ...) forms. Under ACL, there is some
;;; wierd interaction with FORMAT. This shows up as overwritten text in the
;;; pointer documentation and in menus. It acts like a shared buffer is being corrupted
;;; but I can't narrow it down. Using SUBSEQ does fix this interaction that's been
;;; here since 4/16/03 - Mikemac 12/6/2003
(defmethod stream-write-string ((stream standard-extended-output-stream) string
&optional (start 0) end)
(let ((seg-start start)
(end (or end (length string))))
(with-cursor-off stream
(loop for i from start below end do
(when (char= #\Newline
(char string i))
(seos-write-string stream (subseq string seg-start i))
(seos-write-newline stream)
(setq seg-start (1+ i))))
(seos-write-string stream (subseq string seg-start end)))))
;(defmethod stream-write-string ((stream standard-extended-output-stream) string
; &optional (start 0) end)
; (if (null end)
; (setq end (length string)))
; (with-room-for-line
; (loop for i from start below end
; for char = (aref string i)
; do (do-char))))
(defmethod stream-character-width ((stream standard-extended-output-stream) char &key (text-style nil))
(with-sheet-medium (medium stream)
(text-style-character-width (or text-style (medium-text-style medium))
medium
char)))
(defmethod stream-string-width ((stream standard-extended-output-stream) string
&key (start 0) (end nil) (text-style nil))
(with-sheet-medium (medium stream)
(if (null text-style)
(setq text-style (medium-text-style (sheet-medium stream))))
(multiple-value-bind (total-width total-height final-x final-y baseline)
(text-size medium string :text-style text-style
:start start :end end)
(declare (ignore total-height final-y baseline))
(values final-x total-width))))
(defmethod stream-text-margin ((stream standard-extended-output-stream))
(with-slots (margin) stream
(or margin
(- (bounding-rectangle-width (or (pane-viewport stream)
stream))
(text-size stream "O")))))
(defmethod stream-line-height ((stream standard-extended-output-stream)
&key (text-style nil))
(+ (text-style-height (or text-style (medium-text-style (sheet-medium stream)))
(sheet-medium stream))
(stream-vertical-spacing stream)))
(defmethod stream-line-column ((stream standard-extended-output-stream))
(multiple-value-bind (x y) (stream-cursor-position stream)
(declare (ignore y))
(floor x (stream-string-width stream " "))))
(defmethod stream-start-line-p ((stream standard-extended-output-stream))
(multiple-value-bind (x y) (stream-cursor-position stream)
(declare (ignore y))
(zerop x)))
(defmacro with-room-for-graphics ((&optional (stream t)
&rest arguments
&key (first-quadrant t)
height
(move-cursor t)
(record-type ''standard-sequence-output-record))
&body body)
(declare (ignore first-quadrant height move-cursor record-type))
(let ((cont (gensym "CONT."))
(stream (stream-designator-symbol stream '*standard-output*)))
`(labels ((,cont (,stream)
,@body))
(declare (dynamic-extent #',cont))
(invoke-with-room-for-graphics #',cont ,stream ,@arguments))))
(defmacro with-end-of-line-action ((stream action) &body body)
(when (eq stream t)
(setq stream '*standard-output*))
(check-type stream symbol)
`(letf (((stream-end-of-line-action ,stream) ,action))
,@body))
(defmacro with-end-of-page-action ((stream action) &body body)
(when (eq stream t)
(setq stream '*standard-output*))
(check-type stream symbol)
`(letf (((stream-end-of-page-action ,stream) ,action))
,@body))
(defmethod beep (&optional medium)
(if medium
(medium-beep medium)
(when (sheetp *standard-output*)
(medium-beep (sheet-medium *standard-output*)))))
(defmethod scroll-quantum ((sheet standard-extended-output-stream))
(stream-line-height sheet))
|