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;;; (c) copyright 2002 by Alexey Dejneka (adejneka@comail.ru)
;;; (c) copyright 2007 by Andy Hefner (ahefner@gmail.com)
;;; 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.
;;; TODO:
;;; - Define a protocol which the graph formatter can utilize to determine
;;; where graph edges should be connected to shaped output borders.
;;; - ** Double check default value and intent of move-cursor argument.
;;; If I understand things right, move-cursor t for underlining is usually
;;; the wrong thing.
;;; FIXME:
;;; - Various functions which try to accomodate line-thickness do not
;;; attempt to consider possibility of a line-style argument.
;;; - In a perfect world we could make the default shadow ink a tranlucent
;;; ink, but the CLX backend isn't there yet. A stopgap measure could
;;; simply blend against the pane-background.
;;; - Using padding to control the rounded rectangles might be the wrong thing.
;;; ???
;;; - Would it make more sense to draw borders as part of replay (with recording
;;; off, like a displayed record), and letting them effortlessly accomodate
;;; changes in the bounding rectangle of the contents? This would only benefit
;;; people doing unusual things with output records. How would be determine
;;; bounds of the border?
(in-package :clim-internals)
(defclass bordered-output-record (standard-sequence-output-record)
(under record over))
(defgeneric make-bordered-output-record (stream shape record &key
&allow-other-keys)
(:documentation "Instantiates an output record of a class appropriate for the
specified shape containing the given output record, and renders any decorations
associated with the shape."))
(defgeneric draw-output-border-under
(shape stream record &rest drawing-options &key &allow-other-keys)
(:documentation
"Draws the portion of border shape which is visible underneath the surrounded
output"))
(defgeneric draw-output-border-over
(shape stream record &rest drawing-options &key &allow-other-keys)
(:documentation
"Draws the portion of border shape which is visible above the surrounded
output"))
;; Keep this around just for fun, so we can list the defined border types.
(defvar *border-types* nil)
(defparameter *border-default-padding* 4)
(defparameter *border-default-radius* 7)
(defparameter *drop-shadow-default-offset* 6)
;; Defining the border edges directly by the edges of the surrounded output
;; record is wrong in the 'null bounding rectangle' case, occuring when the
;; record has no chidren, or no children with non-null bounding rectangles.
;; Intuitively, the empty border should remain centered on the cursor.
(defmacro with-border-edges ((stream record) &body body)
`(if (null-bounding-rectangle-p ,record)
(multiple-value-bind (left top) (stream-cursor-position ,stream)
(let ((right (1+ left))
(bottom (1+ top)))
,@body))
(with-bounding-rectangle* (left top right bottom) ,record
,@body)))
(defmacro surrounding-output-with-border ((&optional stream
&rest drawing-options &key
(shape :rectangle)
(move-cursor t)
&allow-other-keys)
&body body)
(declare (ignore shape move-cursor))
(setf stream (stream-designator-symbol stream '*standard-output*))
(gen-invoke-trampoline 'invoke-surrounding-output-with-border
(list stream)
drawing-options
body))
(defun %prepare-bordered-output-record
(stream shape border inner-record drawing-options)
(with-sheet-medium (medium stream)
(macrolet ((capture (&body body)
`(multiple-value-bind (cx cy) (stream-cursor-position stream)
(with-output-to-output-record (stream)
(setf (stream-cursor-position stream) (values cx cy))
,@body))))
(let* ((border-under
(with-identity-transformation (medium)
(capture
(apply #'draw-output-border-under
shape stream inner-record drawing-options))))
(border-over
(with-identity-transformation (medium)
(capture
(apply #'draw-output-border-over
shape stream inner-record drawing-options)))))
(with-slots (under record over) border
(setf under border-under
record inner-record
over border-over)
(add-output-record under border)
(add-output-record record border)
(add-output-record over border))
border))))
(defmethod make-bordered-output-record (stream shape inner-record
&rest drawing-options)
(%prepare-bordered-output-record stream shape
(make-instance 'bordered-output-record)
inner-record drawing-options))
;; This should have been exported by the CLIM package, otherwise you can't
;; apply a computed list of drawing options.
(defun invoke-surrounding-output-with-border (stream cont
&rest drawing-options
&key (shape :rectangle)
(move-cursor t)
&allow-other-keys)
(with-keywords-removed (drawing-options (:shape :move-cursor))
(multiple-value-bind (cx cy) (stream-cursor-position stream)
(let ((border (apply #'make-bordered-output-record
stream
shape
(with-output-to-output-record (stream)
;; w-o-t-o-r moved the cursor to the origin.
(setf (stream-cursor-position stream)
(values cx cy))
(funcall cont stream)
(setf (values cx cy)
(stream-cursor-position stream)))
drawing-options)))
(stream-add-output-record stream border)
(when (stream-drawing-p stream)
(with-output-recording-options (stream :record nil)
(replay border stream)))
(if move-cursor
;; move-cursor is true, move cursor to lower-right corner of output.
(with-bounding-rectangle* (left top right bottom) border
(declare (ignore left top))
(setf (stream-cursor-position stream) (values right bottom)))
;; move-cursor is false, preserve the cursor position from after
;; the output (I think this is right, it's useful for :underline)
(setf (stream-cursor-position stream) (values cx cy)))
border))))
(defmethod draw-output-border-under
(shape stream record &rest drawing-options &key &allow-other-keys)
(declare (ignore drawing-options))
(values))
(defmacro %%line-style-for-method ()
`(or line-style
(let ((mls (medium-line-style stream)))
(make-line-style
:unit (or line-unit (line-style-unit mls))
:thickness (or line-thickness (line-style-thickness mls))
:cap-shape (or line-cap-shape (line-style-cap-shape mls))
:dashes (or line-dashes (line-style-dashes mls))))))
(defmacro %%adjusting-for-padding (&body body)
`(let ((left (- left padding-left))
(right (+ right padding-right))
(top (- top padding-top))
(bottom (+ bottom padding-bottom)))
,@body))
(defmacro %%adjusting-padding-for-line-style (&body body)
`(let ((padding-left (+ padding-left (/ (or line-thickness 0) 2)))
(padding-right (+ padding-right (/ (or line-thickness 0) 2)))
(padding-top (+ padding-top (/ (or line-thickness 0) 2)))
(padding-bottom (+ padding-bottom (/ (or line-thickness 0) 2))))
,@body))
(defmacro define-border-type (shape arglist &body body)
(check-type arglist list)
;; The Franz User guide implies that &key isn't needed.
(pushnew '&key arglist)
`(progn
(pushnew ',shape *border-types*)
(defmethod draw-output-border-over ((shape (eql ',shape)) stream record
&rest drawing-options)
(with-border-edges (stream record)
(apply (lambda (,@arglist &allow-other-keys)
,@body)
:stream stream
:record record
:left left
:right right
:top top
:bottom bottom
drawing-options)))))
;;;; Standard border types
(define-border-type :rectangle (stream left top right bottom
ink outline-ink filled
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
line-style
line-unit
line-thickness
line-cap-shape
line-dashes)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(let ((ink (or outline-ink
(and (not filled)
(or ink (medium-ink stream))))))
(when ink
(draw-rectangle* stream
left top right bottom
:line-style (%%line-style-for-method)
:ink ink
:filled nil))))))
(defmethod draw-output-border-under
((shape (eql :rectangle)) stream record
&key background ink filled
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
shadow
(shadow-offset *drop-shadow-default-offset*)
line-thickness
&allow-other-keys)
(when (or background filled)
(with-border-edges (stream record)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(when (and shadow shadow-offset)
(draw-rectangle* stream
(+ shadow-offset left)
(+ shadow-offset top)
(+ shadow-offset right)
(+ shadow-offset bottom)
:ink shadow
:filled t))
(draw-rectangle* stream
left top
right bottom
:ink (or background ink +background-ink+)
:filled t))))))
(define-border-type :oval (stream left top right bottom
(ink (medium-ink stream))
outline-ink
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
line-style
line-unit
line-thickness
line-cap-shape
line-dashes)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(when ink
(draw-oval* stream
(/ (+ left right) 2) (/ (+ top bottom) 2)
(/ (- right left) 2) (/ (- bottom top) 2)
:line-style (%%line-style-for-method)
:ink (or outline-ink ink)
:filled nil)))))
(defmethod draw-output-border-under
((shape (eql :oval)) stream record &key
background ink filled line-thickness
(shadow-offset *drop-shadow-default-offset*)
shadow
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
&allow-other-keys)
(when (or filled background)
(with-border-edges (stream record)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(when shadow
(draw-oval* stream
(+ shadow-offset (/ (+ left right) 2))
(+ shadow-offset (/ (+ top bottom) 2))
(/ (- right left) 2) (/ (- bottom top) 2)
:ink shadow
:filled t))
(draw-oval* stream
(/ (+ left right) 2) (/ (+ top bottom) 2)
(/ (- right left) 2) (/ (- bottom top) 2)
:ink (or background ink +background-ink+)
:filled t))))))
;;; A filled :drop-shadow is almost identical to :rectangle with a
;;; :shadow keyword. So, just use :rectangle instead.
(define-border-type :drop-shadow (stream
left top right bottom
(filled nil)
(shadow-offset 3)
outline-ink
background
(ink (medium-ink stream))
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
line-style
line-unit
line-thickness
line-cap-shape
line-dashes)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(draw-rectangle* stream
left top
right bottom
:line-style (%%line-style-for-method)
:ink (or outline-ink ink)
:filled nil)
;; If the user has (wisely) chosen my more modern "filled" style,
;; we'll simply draw two rectangles, one offset from the other,
;; to provide a solid background color and shadow.
;; Note that the background keyword implies :filled t.
(unless (or filled background)
(when (< shadow-offset 0) ; FIXME!
(setf shadow-offset 0))
(draw-rectangle* stream
right (+ top shadow-offset)
(+ right shadow-offset) bottom
:ink (or outline-ink ink)
:filled t)
(draw-rectangle* stream
(+ left shadow-offset) bottom
(+ right shadow-offset) (+ bottom shadow-offset)
:ink (or outline-ink ink)
:filled t)))))
(defmethod draw-output-border-under
((shape (eql :drop-shadow)) stream record &key
(filled nil)
(shadow-offset *drop-shadow-default-offset*)
background
outline-ink
shadow
(ink +foreground-ink+)
line-thickness
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y))
(with-border-edges (stream record)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(when (or filled background)
(let* ((fill-color (or background +background-ink+))
(shadow-color (or shadow outline-ink ink +background-ink+)))
(draw-rectangle* stream
(+ shadow-offset left)
(+ shadow-offset top)
(+ shadow-offset right)
(+ shadow-offset bottom)
:filled t
:ink shadow-color)
(draw-rectangle* stream left top right bottom
:filled t
:ink fill-color)))))))
(define-border-type :underline (stream record
(ink (medium-ink stream))
line-style
line-unit
line-thickness
line-cap-shape
line-dashes)
(let ((line-style (%%line-style-for-method)))
(labels ((fn (record)
(loop for child across (output-record-children record) do
(typecase child
(text-displayed-output-record
(with-bounding-rectangle* (left top right bottom) child
(declare (ignore top))
(draw-line* stream left bottom right bottom
:ink ink
:line-style line-style)))
(updating-output-record nil)
(compound-output-record (fn child))))))
(fn record))))
(define-border-type :inset (stream left top right bottom
(padding *border-default-padding*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y))
(%%adjusting-for-padding
(let ((dark *3d-dark-color*)
(light *3d-light-color*))
(flet ((draw (left-edge right-edge bottom-edge top-edge light dark)
(draw-line* stream left-edge bottom-edge left-edge top-edge
:ink dark)
(draw-line* stream left-edge top-edge right-edge top-edge
:ink dark)
(draw-line* stream right-edge bottom-edge right-edge top-edge
:ink light)
(draw-line* stream left-edge bottom-edge right-edge bottom-edge
:ink light)))
(draw left right bottom top light dark)
(draw (1+ left) (1- right) (1- bottom) (1+ top) light dark)))))
;;; Padding defaults to radius. I'm not sure if this is right, but it lets you do
;;; things like forcing the radius on one side to zero, flattening that side,
;;; and stopping the edge from jamming against the output (saving you the trouble
;;; of having to manually hack the padding on one side to compensate). If someone
;;; can think of a better approach to defaulting the radius and padding arguments,
;;; do share.
(define-border-type :rounded (stream left top right bottom
(radius *border-default-radius*)
(radius-x radius)
(radius-y radius)
(radius-left radius-x)
(radius-right radius-x)
(radius-top radius-y)
(radius-bottom radius-y)
(padding radius)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
ink
filled
outline-ink
line-style
line-unit
line-thickness
line-cap-shape
line-dashes)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(let ((ink (or outline-ink
(and (not filled) (or ink +foreground-ink+)))))
(when ink
(draw-rounded-rectangle* stream left top right bottom
:radius-left radius-left ; padding-left
:radius-right radius-right ; padding-right
:radius-top radius-top ; padding-top
:radius-bottom radius-bottom ; padding-bottom
:ink ink
:filled nil
:line-style (%%line-style-for-method)))))))
(defmethod draw-output-border-under ((shape (eql :rounded)) stream record &key
(radius *border-default-radius*)
(radius-x radius)
(radius-y radius)
(radius-left radius-x)
(radius-right radius-x)
(radius-top radius-y)
(radius-bottom radius-y)
(padding radius)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
ink
filled
background
shadow
(shadow-offset *drop-shadow-default-offset*)
line-thickness)
(with-border-edges (stream record)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(when (or filled background)
(when (and shadow shadow-offset)
(draw-rounded-rectangle* stream
(+ left shadow-offset)
(+ top shadow-offset)
(+ shadow-offset right)
(+ shadow-offset bottom)
:radius-left radius-left
:radius-right radius-right
:radius-top radius-top
:radius-bottom radius-bottom
:ink shadow
:filled t))
(let ((ink (or background ink +background-ink+)))
(draw-rounded-rectangle* stream left top right bottom
:radius-left radius-left
:radius-right radius-right
:radius-top radius-top
:radius-bottom radius-bottom
:ink ink
:filled t)))))))
(define-border-type :ellipse (stream left top right bottom
(padding *border-default-radius*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
ink outline-ink filled
circle
line-style
line-unit
min-radius
(min-radius-x min-radius)
(min-radius-y min-radius)
line-thickness
line-cap-shape
line-dashes)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(let ((ink (or outline-ink (and (not filled)
(or ink +foreground-ink+)))))
(when ink
(let* ((cx (/ (+ right left) 2))
(cy (/ (+ top bottom) 2))
(radius-x (- right cx))
(radius-y (- bottom cy))
(radius-x (if circle
(sqrt (+ (* radius-x radius-x)
(* radius-y radius-y)))
radius-x))
(radius-y (if circle radius-x radius-y))
(fx (/ radius-x (cos (/ pi 4))))
(fy (/ radius-y (sin (/ pi 4))))
(fx (max fx (or min-radius-x 0)))
(fy (max fy (or min-radius-y 0))))
(draw-ellipse* stream cx cy fx 0 0 fy
:filled nil :ink ink
:line-style (%%line-style-for-method))))))))
(defmethod draw-output-border-under
((shape (eql :ellipse)) stream record &key
(padding *border-default-radius*)
(padding-x padding)
(padding-y padding)
(padding-left padding-x)
(padding-right padding-x)
(padding-top padding-y)
(padding-bottom padding-y)
ink background filled
circle
min-radius
shadow
(shadow-offset *drop-shadow-default-offset*)
(min-radius-x min-radius)
(min-radius-y min-radius)
line-thickness)
(with-border-edges (stream record)
(%%adjusting-padding-for-line-style
(%%adjusting-for-padding
(let ((ink (or background (and filled (or ink +background-ink+)))))
(when ink
(let* ((cx (/ (+ right left) 2))
(cy (/ (+ top bottom) 2))
(radius-x (- right cx))
(radius-y (- bottom cy))
(radius-x (if circle
(sqrt (+ (* radius-x radius-x)
(* radius-y radius-y)))
radius-x))
(radius-y (if circle radius-x radius-y))
(fx (/ radius-x (cos (/ pi 4))))
(fy (/ radius-y (sin (/ pi 4))))
(fx (max fx (or min-radius-x 0)))
(fy (max fy (or min-radius-y 0))) )
(when (and shadow shadow-offset)
(draw-ellipse* stream (+ cx shadow-offset) (+ cy shadow-offset)
fx 0 0 fy :filled t :ink shadow))
(draw-ellipse* stream cx cy fx 0 0 fy
:filled t :ink ink))))))))
(defmethod highlight-output-record ((record bordered-output-record) stream state)
(format *trace-output* "b-o-r ~A ~A ~A~%" record stream state)
(call-next-method))
;;; Suppress highlighting of the border decoration itself:
(defmethod highlight-output-record-tree
((record bordered-output-record) stream state)
(highlight-output-record-tree (slot-value record 'record) stream state))
;;;; Highlighting of bordered output records
(defclass highlighting-bordered-output-record (bordered-output-record)
((shape :reader shape :initarg :shape)
(drawing-options :reader drawing-options
:initarg :drawing-options
:initform nil)))
(defmethod highlight-output-record-tree
((record highlighting-bordered-output-record)
stream state)
;; Was this border created with the required options for highlighting?
(if (and (member state '(:highlight :unhighlight))
(or (getf (drawing-options record) :highlight-background)
(getf (drawing-options record) :highlight-outline)))
(highlight-output-record record stream state)
(call-next-method)))
(defmethod highlight-output-record ((record highlighting-bordered-output-record)
stream state)
(let ((drawing-options (drawing-options record)))
(destructuring-bind (&key background
outline-ink
highlight-background
highlight-outline
&allow-other-keys)
drawing-options
(if (and (member state '(:highlight :unhighlight))
(or highlight-background highlight-outline))
(flet ((redraw (new-drawing-options)
(clear-output-record record)
(%prepare-bordered-output-record stream (shape record) record
(slot-value record 'record)
new-drawing-options)
;; Great, this again..
(queue-repaint stream
(make-instance 'window-repaint-event
:sheet stream
:region (transform-region
(sheet-native-transformation stream)
record)))))
(ecase state
(:highlight
(with-keywords-removed (drawing-options (:background :outline-ink))
(redraw (list* :background
(or (and (eql t highlight-background)
(highlight-shade (or background
(getf drawing-options :ink)
+background-ink+)))
highlight-background
background)
:outline-ink
(or (and (eql t highlight-outline)
(highlight-shade (or outline-ink
(getf drawing-options :ink)
+foreground-ink+)))
highlight-outline
outline-ink)
drawing-options))))
(:unhighlight (redraw drawing-options))))
(call-next-method)))))
(defmacro define-default-highlighting-method (shape)
`(defmethod make-bordered-output-record (stream (shape (eql ,shape))
inner-record &rest drawing-options)
(%prepare-bordered-output-record stream shape
(make-instance 'highlighting-bordered-output-record
:shape shape
:drawing-options drawing-options)
inner-record drawing-options)))
(define-default-highlighting-method :rectangle)
(define-default-highlighting-method :oval)
(define-default-highlighting-method :drop-shadow)
(define-default-highlighting-method :rounded)
(define-default-highlighting-method :ellipse)
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