217 lines
8.0 KiB
Scheme
217 lines
8.0 KiB
Scheme
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(module widget mzscheme
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(require (lib "class.ss")
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(lib "unitsig.ss")
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(lib "mred.ss" "mred")
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(lib "framework.ss" "framework")
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(lib "list.ss")
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"interfaces.ss"
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"params.ss"
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"controller.ss"
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"typesetter.ss"
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"hrule-snip.ss"
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"properties.ss"
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"partition.ss"
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"util.ss")
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(provide widget@
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widget-context-menu-extension@)
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(define widget@
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(unit/sig widget^
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(import keymap^
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context-menu^)
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;; syntax-widget%
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;; A syntax-widget creates its own syntax-controller.
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(define syntax-widget%
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(class* object% (syntax-browser<%> syntax-properties-controller<%>)
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(init parent)
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(init-field pref:props-percentage)
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(define -main-panel (new vertical-panel% (parent parent)))
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(define -split-panel (new panel:horizontal-dragable% (parent -main-panel)))
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(define -text (new browser-text%))
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(define -ecanvas (new editor-canvas% (parent -split-panel) (editor -text)))
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(define -props-panel (new horizontal-panel% (parent -split-panel)))
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(define props (new properties-view% (parent -props-panel)))
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(define props-percentage (pref:props-percentage))
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(define controller
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(new syntax-controller%
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(properties-controller this)))
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(new syntax-keymap%
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(editor -text)
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(context-menu (new context-menu% (widget this))))
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;; FIXME: Why doesn't this work?
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#;
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(when (current-syntax-font-size)
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(let* ([style-list (send -text get-style-list)]
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[standard (send style-list find-named-style "Standard")])
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(send style-list replace-named-style "Standard"
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(send style-list find-or-create-style
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standard
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(make-object style-delta% 'change-size
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(current-syntax-font-size))))))
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(send -text lock #t)
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(send -split-panel set-percentages
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(list (- 1 props-percentage) props-percentage))
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(toggle-props)
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;; syntax-properties-controller<%> methods
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(define/public (set-syntax stx)
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(send props set-syntax stx))
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(define/public (show ?)
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(if ? (show-props) (hide-props)))
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(define/public (is-shown?)
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(send -props-panel is-shown?))
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(define/public (toggle-props)
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(if (send -props-panel is-shown?)
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(hide-props)
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(show-props)))
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(define/public (hide-props)
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(when (send -props-panel is-shown?)
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(set! props-percentage (cadr (send -split-panel get-percentages)))
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(send -split-panel delete-child -props-panel)
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(send -props-panel show #f)))
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(define/public (show-props)
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(unless (send -props-panel is-shown?)
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(send -split-panel add-child -props-panel)
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(send -split-panel set-percentages
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(list (- 1 props-percentage) props-percentage))
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(send -props-panel show #t)))
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;;
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(define/public (get-controller) controller)
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;;
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(define/public (get-main-panel) -main-panel)
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(define/public (save-prefs)
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(unless (= props-percentage (pref:props-percentage))
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(pref:props-percentage props-percentage)))
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;; syntax-browser<%> Methods
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(define/public (add-text text)
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(with-unlock -text
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(send -text insert text)))
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(define/public add-syntax
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(case-lambda
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[(stx)
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(internal-add-syntax stx null #f)]
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[(stx hi-stxs hi-color)
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(internal-add-syntax stx hi-stxs hi-color)]))
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(define/public (add-separator)
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(with-unlock -text
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(send* -text
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(insert (new hrule-snip%))
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(insert "\n"))))
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(define/public (erase-all)
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(with-unlock -text (send -text erase))
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(send controller erase))
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(define/public (select-syntax stx)
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(send controller select-syntax stx))
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(define/public (get-text) -text)
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(define/private (internal-add-syntax stx hi-stxs hi-color)
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(with-unlock -text
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(parameterize ((current-default-columns (calculate-columns)))
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(let ([current-position (send -text last-position)])
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(let* ([new-ts (new typesetter-for-text%
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(controller controller)
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(syntax stx)
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(text -text))]
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[new-colorer (send new-ts get-colorer)])
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(send* -text
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(insert "\n")
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(scroll-to-position current-position))
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(unless (null? hi-stxs)
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(send new-colorer highlight-syntaxes hi-stxs hi-color)))))))
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(define/private (calculate-columns)
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(define style (code-style -text))
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(define char-width (send style get-text-width (send -ecanvas get-dc)))
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(define-values (canvas-w canvas-h) (send -ecanvas get-client-size))
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(sub1 (inexact->exact (floor (/ canvas-w char-width)))))
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(super-new)))
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;; syntax-widget/controls%
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(define syntax-widget/controls%
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(class* syntax-widget% ()
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(inherit get-main-panel
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get-controller
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toggle-props)
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(super-new)
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(define -control-panel
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(new horizontal-pane% (parent (get-main-panel)) (stretchable-height #f)))
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;; Put the control panel up front
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(send (get-main-panel) change-children
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(lambda (children)
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(cons -control-panel (remq -control-panel children))))
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(define -identifier=-choices (identifier=-choices))
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(define -choice
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(new choice% (label "identifer=?") (parent -control-panel)
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(choices (map car -identifier=-choices))
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(callback (lambda _ (on-update-identifier=?-choice)))))
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(new button%
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(label "Clear")
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(parent -control-panel)
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(callback (lambda _ (send (get-controller) select-syntax #f))))
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(new button%
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(label "Properties")
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(parent -control-panel)
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(callback (lambda _ (toggle-props))))
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(define/private (on-update-identifier=?-choice)
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(cond [(assoc (send -choice get-string-selection)
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-identifier=-choices)
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=> (lambda (p)
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(send (get-controller)
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on-update-identifier=? (car p) (cdr p)))]
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[else #f]))
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(send (get-controller) add-identifier=?-listener
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(lambda (name func)
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(send -choice set-selection
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(or (send -choice find-string name) 0))))))
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))
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(define widget-context-menu-extension@
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(unit/sig context-menu^
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(import (pre : context-menu^))
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(define context-menu%
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(class pre:context-menu%
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(init-field widget)
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(define/override (after-selection-items)
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(super after-selection-items)
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(new menu-item% (label "Show/hide syntax properties")
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(parent this)
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(callback (lambda _ (send widget toggle-props))))
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(void))
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(super-new (controller (send widget get-controller)))))))
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(define browser-text% (editor:standard-style-list-mixin text:basic%))
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)
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