macro-debugger/collects/macro-debugger/syntax-browser/text.rkt
Ryan Culpepper d62630672e macro-debugger: right-click also changes syntax selection
fixes PR 12442

original commit: fa5e57335cc784ea3b50ba86f7c49cbd7240842f
2012-02-24 17:51:41 -07:00

476 lines
17 KiB
Racket

#lang racket/base
(require racket/class
racket/gui/base
data/interval-map
drracket/arrow
framework
data/interval-map
"interfaces.rkt")
(provide text:hover<%>
text:hover-drawings<%>
text:arrows<%>
text:hover-mixin
text:hover-drawings-mixin
text:tacking-mixin
text:arrows-mixin
text:region-data-mixin
text:clickregion-mixin
browser-text%)
(define arrow-cursor (make-object cursor% 'arrow))
(define arrow-brush
(send the-brush-list find-or-create-brush "white" 'solid))
(define (tacked-arrow-brush color)
(send the-brush-list find-or-create-brush color 'solid))
(define billboard-brush
(send the-brush-list find-or-create-brush "white" 'solid))
(define white (send the-color-database find-color "white"))
;; A Drawing is (make-drawing (??? -> void) (box boolean))
(define-struct drawing (draw tacked?))
(define-struct idloc (start end id))
(define (mean x y)
(/ (+ x y) 2))
;; save+restore pen, brush, also smoothing
(define-syntax with-saved-pen&brush
(syntax-rules ()
[(with-saved-pen&brush dc . body)
(save-pen&brush dc (lambda () . body))]))
(define (save-pen&brush dc thunk)
(let ([old-pen (send dc get-pen)]
[old-brush (send dc get-brush)]
[old-smoothing (send dc get-smoothing)])
(begin0 (thunk)
(send* dc
(set-pen old-pen)
(set-brush old-brush)
(set-smoothing old-smoothing)))))
(define-syntax with-saved-text-config
(syntax-rules ()
[(with-saved-text-config dc . body)
(save-text-config dc (lambda () . body))]))
(define (save-text-config dc thunk)
(let ([old-font (send dc get-font)]
[old-color (send dc get-text-foreground)]
[old-background (send dc get-text-background)]
[old-mode (send dc get-text-mode)])
(begin0 (thunk)
(send* dc
(set-font old-font)
(set-text-foreground old-color)
(set-text-background old-background)
(set-text-mode old-mode)))))
;; Interfaces
(define text:region-data<%>
(interface (text:basic<%>)
get-region-mapping))
(define text:hover<%>
(interface (text:basic<%>)
update-hover-position))
(define text:hover-drawings<%>
(interface (text:basic<%>)
add-hover-drawing
get-position-drawings))
(define text:arrows<%>
(interface (text:hover-drawings<%>)
add-arrow
add-billboard))
;; Mixins
(define text:region-data-mixin
(mixin (text:basic<%>) (text:region-data<%>)
(define table (make-hasheq))
(define/public (get-region-mapping key)
(hash-ref! table key (lambda () (make-interval-map))))
(define/augment (after-delete start len)
(for ([im (in-hash-values table)])
(interval-map-contract! im start (+ start len)))
(inner (void) after-delete start len))
(define/augment (after-insert start len)
(for ([im (in-hash-values table)])
(interval-map-expand! im start (+ start len)))
(inner (void) after-insert start len))
(super-new)))
(define text:hover-mixin
(mixin (text:basic<%>) (text:hover<%>)
(inherit dc-location-to-editor-location
find-position)
(define/override (on-default-event ev)
(super on-default-event ev)
(case (send ev get-event-type)
((enter motion leave)
(define-values (x y)
(let ([gx (send ev get-x)]
[gy (send ev get-y)])
(dc-location-to-editor-location gx gy)))
(define on-it? (box #f))
(define pos (find-position x y #f on-it?))
(update-hover-position (and (unbox on-it?) pos)))))
(define/public (update-hover-position pos)
(void))
(super-new)))
(define text:hover-drawings-mixin
(mixin (text:hover<%> text:region-data<%>) (text:hover-drawings<%>)
(inherit dc-location-to-editor-location
find-position
invalidate-bitmap-cache
get-region-mapping)
(super-new)
;; interval-map of Drawings
(define drawings-list (get-region-mapping 'hover-drawings))
(field [hover-position #f])
(define/override (update-hover-position pos)
(define old-pos hover-position)
(super update-hover-position pos)
(set! hover-position pos)
(unless (same-drawings? old-pos pos)
(invalidate-bitmap-cache 0.0 0.0 +inf.0 +inf.0)))
(define/public (add-hover-drawing start end draw [tack-box (box #f)])
(let ([drawing (make-drawing draw tack-box)])
(interval-map-cons*! drawings-list
start (add1 end)
drawing
null)))
(define/override (on-paint before? dc left top right bottom dx dy draw-caret)
(super on-paint before? dc left top right bottom dx dy draw-caret)
(unless before?
(for ([d (get-position-drawings hover-position)])
((drawing-draw d) this dc left top right bottom dx dy))))
(define/public (get-position-drawings pos)
(if pos (interval-map-ref drawings-list pos null) null))
(define/private (same-drawings? old-pos pos)
;; relies on order drawings added & list-of-eq?-struct equality
(equal? (get-position-drawings old-pos)
(get-position-drawings pos)))))
(define text:tacking-mixin
(mixin (text:basic<%> text:hover-drawings<%>) ()
(inherit get-canvas
get-keymap
get-position-drawings)
(inherit-field hover-position)
(super-new)
(define tacked-table (make-hasheq))
(define/override (on-local-event ev)
(case (send ev get-event-type)
((right-down)
(if (pair? (get-position-drawings hover-position))
(send (get-canvas) popup-menu
(make-tack/untack-menu (get-position-drawings hover-position))
(send ev get-x)
(send ev get-y))
(super on-local-event ev)))
(else
(super on-local-event ev))))
;; Clear tacked-table on any modification.
;; FIXME: possible to be more precise? (but not needed for macro stepper)
(define/augment (after-delete start len)
(set! tacked-table (make-hasheq))
(inner (void) after-delete start len))
(define/augment (after-insert start len)
(set! tacked-table (make-hasheq))
(inner (void) after-insert start len))
(define/override (on-paint before? dc left top right bottom dx dy draw-caret)
(super on-paint before? dc left top right bottom dx dy draw-caret)
(unless before?
(for ([draw (in-hash-keys tacked-table)])
(draw this dc left top right bottom dx dy))))
(define/private (make-tack/untack-menu drawings)
(define menu (new popup-menu%))
(define keymap (get-keymap))
(define tack-item
(new menu-item% (label "Tack")
(parent menu)
(callback (lambda _ (tack drawings)))))
(define untack-item
(new menu-item% (label "Untack")
(parent menu)
(callback (lambda _ (untack drawings)))))
(send tack-item enable
(for/or ([d (in-list drawings)]) (not (unbox (drawing-tacked? d)))))
(send untack-item enable
(for/or ([d (in-list drawings)]) (unbox (drawing-tacked? d))))
(when (is-a? keymap keymap/popup<%>)
(new separator-menu-item% (parent menu))
(send keymap add-context-menu-items menu))
menu)
(define/private (tack drawings)
(for ([d (in-list drawings)])
(hash-set! tacked-table (drawing-draw d) #t)
(set-box! (drawing-tacked? d) #t)))
(define/private (untack drawings)
(for ([d (in-list drawings)])
(hash-remove! tacked-table (drawing-draw d))
(set-box! (drawing-tacked? d) #f)))))
(define text:arrows-mixin
(mixin (text:hover-drawings<%>) (text:arrows<%>)
(inherit position-location
add-hover-drawing
find-wordbreak)
(define/public (add-billboard pos1 pos2 str color-name)
(define color (send the-color-database find-color color-name))
(let ([draw
(lambda (text dc left top right bottom dx dy)
(let-values ([(x y) (range->mean-loc pos1 pos1)]
[(fw fh _d _v) (send dc get-text-extent "y")])
(with-saved-pen&brush dc
(with-saved-text-config dc
(send* dc
(set-pen color 1 'solid)
(set-brush billboard-brush)
(set-text-mode 'solid)
(set-font (billboard-font dc))
(set-text-foreground color))
(let-values ([(w h d v) (send dc get-text-extent str)]
[(adj-y) fh]
[(mini) _d])
(send* dc
(set-smoothing 'smoothed)
(draw-rounded-rectangle
(+ x dx)
(+ y dy adj-y)
(+ w mini mini)
(+ h mini mini))
(draw-text str (+ x dx mini) (+ y dy mini adj-y))))))))])
(add-hover-drawing pos1 pos2 draw)))
(define/public (add-arrow from1 from2 to1 to2 color-name label where)
(define color (send the-color-database find-color color-name))
(define tack-box (box #f))
(unless (and (= from1 to1) (= from2 to2))
(let ([draw
(lambda (text dc left top right bottom dx dy)
(let-values ([(startx starty) (range->mean-loc from1 from2)]
[(endx endy) (range->mean-loc to1 to2)]
[(fw fh _d _v) (send dc get-text-extent "x")]
[(lw lh ld _V) (send dc get-text-extent (or label "x"))])
(with-saved-pen&brush dc
(with-saved-text-config dc
(send dc set-pen color 1 'solid)
(send dc set-brush
(if (unbox tack-box)
(tacked-arrow-brush color)
arrow-brush))
(draw-arrow dc startx
(+ starty (/ fh 2))
endx
(+ endy (/ fh 2))
dx dy)
(when label
(let* ([lx (+ endx dx fw)]
[ly (- (+ endy dy) fh)])
(send* dc
(set-brush billboard-brush)
(set-font (billboard-font dc))
(set-text-foreground color)
(set-smoothing 'smoothed)
(draw-rounded-rectangle (- lx ld) (- ly ld)
(+ lw ld ld) (+ lh ld ld))
(draw-text label lx ly))))))))])
(add-hover-drawing from1 from2 draw tack-box)
(add-hover-drawing to1 to2 draw tack-box))))
(define/private (position->location p)
(define xbox (box 0.0))
(define ybox (box 0.0))
(position-location p xbox ybox)
(values (unbox xbox) (unbox ybox)))
(define/private (?-font dc)
(let ([size (send (send dc get-font) get-point-size)])
(send the-font-list find-or-create-font size 'default 'normal 'bold)))
(define/private (billboard-font dc)
(let ([size (send (send dc get-font) get-point-size)])
(send the-font-list find-or-create-font size 'default 'normal)))
(define/private (range->mean-loc pos1 pos2)
(let*-values ([(loc1x loc1y) (position->location pos1)]
[(loc2x loc2y) (position->location pos2)]
[(locx) (mean loc1x loc2x)]
[(locy) (mean loc1y loc2y)])
(values locx locy)))
(super-new)))
#|
text:clickregion-mixin
Like clickbacks, but:
- use interval-map to avoid linear search
(major problem w/ macro stepper and large expansions!)
- callback takes position of click, not (start, end)
- different rules for removal
- TODO: extend to double-click
|#
(define text:clickregion-mixin
(mixin (text:region-data<%>) ()
(inherit get-admin
get-region-mapping
dc-location-to-editor-location
find-position)
(super-new)
;; Two mappings: one for left clicks, another for right
;; mouse-downs. Rationale: macro stepper wants to handle left
;; clicks normally, but wants to insert behavior (ie, change
;; focus) before normal processing of right-down (ie, editor
;; passes to keymap, opens popup menu).
(define clickbacks (get-region-mapping 'click-region))
(define right-clickbacks (get-region-mapping 'right-click-region))
(define tracking #f)
(define/public (set-clickregion start end callback [region 'click])
(let ([mapping
(case region
((click) clickbacks)
((right-down) right-clickbacks)
(else (error 'set-clickregion
"bad region symbol: expected 'click or 'right-down, got ~e"
region)))])
(if callback
(interval-map-set! mapping start end callback)
(interval-map-remove! mapping start end))))
(define/private (get-event-position ev)
(define-values (x y)
(let ([gx (send ev get-x)]
[gy (send ev get-y)])
(dc-location-to-editor-location gx gy)))
(define on-it? (box #f))
(define pos (find-position x y #f on-it?))
(and (unbox on-it?) pos))
;; on-default-event called if keymap does not handle event
(define/override (on-default-event ev)
(define admin (get-admin))
(when admin
(define pos (get-event-position ev))
(case (send ev get-event-type)
((left-down)
(set! tracking (and pos (interval-map-ref clickbacks pos #f)))
(send admin update-cursor))
((left-up)
(when tracking
(let ([cb (and pos (interval-map-ref clickbacks pos #f))]
[tracking* tracking])
(set! tracking #f)
(when (eq? tracking* cb)
(cb pos)))
(send admin update-cursor)))))
(super on-default-event ev))
;; on-local-event called before keymap consulted
(define/override (on-local-event ev)
(case (send ev get-event-type)
((right-down)
(when (get-admin)
(define pos (get-event-position ev))
(let ([cb (and pos (interval-map-ref right-clickbacks pos #f))])
(when cb (cb pos))))))
(super on-local-event ev))
(define/override (adjust-cursor ev)
(define pos (get-event-position ev))
(define cb (and pos (interval-map-ref clickbacks pos #f)))
(if cb
arrow-cursor
(super adjust-cursor ev)))))
#|
(define text:hover-identifier<%>
(interface ()
get-hovered-identifier
set-hovered-identifier
listen-hovered-identifier))
(define text:hover-identifier-mixin
(mixin (text:hover<%>) (text:hover-identifier<%>)
(define-notify hovered-identifier (new notify-box% (value #f)))
(define idlocs null)
(define/public (add-identifier-location start end id)
(set! idlocs (cons (make-idloc start end id) idlocs)))
(define/public (delete-all-identifier-locations)
(set! idlocs null)
(set-hovered-identifier #f))
(define/override (update-hover-position pos)
(super update-hover-position pos)
(let search ([idlocs idlocs])
(cond [(null? idlocs) (set-hovered-identifier #f)]
[(and (<= (idloc-start (car idlocs)) pos)
(< pos (idloc-end (car idlocs))))
(set-hovered-identifier (idloc-id (car idlocs)))]
[else (search (cdr idlocs))])))
(super-new)))
|#
(define browser-text%
(let ([browser-text-default-style-name "widget.rkt::browser-text% basic"])
(class (text:clickregion-mixin
(text:arrows-mixin
(text:tacking-mixin
(text:hover-drawings-mixin
(text:hover-mixin
(text:region-data-mixin
(text:hide-caret/selection-mixin
(text:foreground-color-mixin
(editor:standard-style-list-mixin text:basic%)))))))))
(inherit set-autowrap-bitmap get-style-list)
(define/override (default-style-name) browser-text-default-style-name)
(super-new (auto-wrap #t))
(let* ([sl (get-style-list)]
[standard (send sl find-named-style (editor:get-default-color-style-name))]
[browser-basic (send sl find-or-create-style standard
(make-object style-delta% 'change-family 'default))])
(send sl new-named-style browser-text-default-style-name browser-basic))
(set-autowrap-bitmap #f))))