method (send a-racket:sexp-snip get-saved-snips)

→ (listof (is-a?/c snip%))

This returns the list of snips hidden by the sexp snip.

method (send a-racket:sexp-snip get-text   offset             num            [ flattened?])   →   string?

offset : number?

num : number?

flattened? : boolean? = #f

Overrides get-text in snip%.

Returns the concatenation of the text for all of the hidden snips.

method (send a-racket:sexp-snip copy) → (is-a?/c racket:sexp-snip%)

Overrides copy in snip%.

Returns a copy of this snip that includes the hidden snips.

method (send a-racket:sexp-snip write stream-out) → void?

stream-out : (is-a?/c editor-stream-out%)

Overrides write in snip%.

Saves the embedded snips

method (send a-racket:sexp-snip draw   dc             x             y             left             top             right             bottom             dx             dy             draw-caret)   →   void?

dc : dc<%>

x : real?

y : real?

left : real?

top : real?

right : real?

bottom : real?

dx : real?

dy : real?

draw-caret : symbol?

Overrides draw in snip%.

Draws brackets with a centered ellipses between them.

method (send a-racket:sexp-snip get-extent   dc             x             y            [ w             h             descent             space             lspace             rspace])   →   void?

dc : (is-a?/c dc<%>)

x : real?

y : real?

w : (or/c (box/c (and/c real? (not/c negative?))) #f) = #f

h : (or/c (box/c (and/c real? (not/c negative?))) #f) = #f

descent   :   (or/c (box/c (and/c real? (not/c negative?))) #f)       =   #f

space : (or/c (box/c (and/c real? (not/c negative?))) #f) = #f

lspace   :   (or/c (box/c (and/c real? (not/c negative?))) #f)       =   #f

rspace   :   (or/c (box/c (and/c real? (not/c negative?))) #f)       =   #f

Overrides get-extent in snip%.

Returns a size corresponding to what this snip draws.

method (send a-racket:text get-limit start) → exact-integer?

start : exact-integer?

Returns a limit for backward-matching parenthesis starting at position start.

method (send a-racket:text balance-parens key-event) → void?

key-event : (is-a?/c key-event%)

This function is called when the user types a close parenthesis in the text%. If the close parenthesis that the user inserted does not match the corresponding open parenthesis and the 'framework:fixup-parens preference is #t (see preferences:get) the correct closing parenthesis is inserted. If the 'framework:paren-match preference is #t (see preferences:get) the matching open parenthesis is flashed.

method (send a-racket:text tabify-on-return?) → boolean?

The result of this method is used to determine if the return key automatically tabs over to the correct position.

Override it to change its behavior.

method (send a-racket:text tabify [start-pos]) → void?

start-pos : exact-integer? = (send this get-start-position)

Tabs the line containing by start-pos

method (send a-racket:text tabify-selection  [ start             end])   →   void?

start : exact-integer? = (send this get-start-position)

end : exact-integer? = (send this get-end-position)

Sets the tabbing for the lines containing positions start through end.

method (send a-racket:text tabify-all) → void?

Tabs all lines.

Indentation results depend on the graphical context associated with the object; if there is not one, the indentation is based on the assumption that a fixed-width font is used. If the object is viewed in an editor-canvas% and top-level-window<%>, the actual font information is used to determine the initial number of spaces on a line.

method (send a-racket:text compute-racket-amount-to-indent       pos      [ get-head-sexp-type])

→ exact-nonnegative-integer?

pos : exact-nonnegative-integer?

get-head-sexp-type   :   (-> string? (or/c #f 'lambda 'define 'begin 'for/fold 'other))       =   (λ (x) #f)

This method is final, so it cannot be overridden.

Computes the amount of space to indent the line containing pos, using the default s-expression indentation strategy.

The function get-head-sexp-type is consulted for each symbol/keyword that follows an open parenthesis. If it returns #f, then the user’s preferences (from the Indenting panel of the Editing panel in the preferences dialog) are used.

Indentation results depend on the graphical context associated with the object; if there is not one, the indentation is based on the assumption that a fixed-width font is used. If the object is viewed in an editor-canvas% and top-level-window<%>, the actual font information is used to determine the initial number of spaces on a line.

Added in version 1.9 of package gui-lib.
Changed in version 1.26: Added the get-head-sexp-type argument.

method (send a-racket:text compute-amount-to-indent pos)

→ exact-nonnegative-integer?

pos : exact-nonnegative-integer?

Refine this method with augment.

Computes the amount of space to indent the line containing pos.

Defaults to using using the default s-expression indentation strategy via compute-racket-amount-to-indent.

Added in version 1.9 of package gui-lib.

method (send a-racket:text insert-return) → void?

Inserts a newline into the buffer. If tabify-on-return? returns #t, this will tabify the new line. Deletes any trailing whitespace from the old line.

method (send a-racket:text box-comment-out-selection   start-pos       end-pos)

→ void?

start-pos : (or/c (symbols 'start) exact-integer?)

end-pos : (or/c (symbols 'end) exact-integer?)

This method comments out a selection in the text by putting it into a comment box.

Removes the region from start-pos to end-pos from the editor and inserts a comment box with that region of text inserted into the box.

If start-pos is 'start, the starting point of the selection is used. If end-pos is 'end, the ending point of the selection is used.

method (send a-racket:text comment-out-selection   start             end)   →   void?

start : exact-integer?

end : exact-integer?

Comments the lines containing positions start through end by inserting a semi-colon at the front of each line.

method (send a-racket:text uncomment-selection   start             end)   →   void?

start : exact-integer?

end : exact-integer?

Uncomments the lines containing positions start through end.

method (send a-racket:text get-forward-sexp start)

→ (or/c #f exact-integer?)

start : exact-integer?

Returns the position of the end of next S-expression after position start, or #f if there is no appropriate answer.

method (send a-racket:text remove-sexp start) → void?

start : exact-integer?

Forward-deletes the S-expression starting after the position start.

method (send a-racket:text forward-sexp start) → void?

start : exact-integer?

Moves forward over the S-expression starting at position start.

method (send a-racket:text flash-forward-sexp start-pos) → void?

start-pos : exact-integer?

Flashes the parenthesis that closes the sexpression at start-pos.

method (send a-racket:text get-backward-sexp start)

→ (or/c exact-integer? #f)

start : exact-integer?

Returns the position of the start of the S-expression before or containing start, or #f if there is no appropriate answer.

method (send a-racket:text flash-backward-sexp start-pos) → void?

start-pos : exact-integer?

Flashes the parenthesis that opens the sexpression at start-pos.

method (send a-racket:text backward-sexp start-pos) → void?

start-pos : exact-integer?

Move the caret backwards one sexpression

Moves the caret to the beginning of the sexpression that ends at start-pos.

method (send a-racket:text find-up-sexp start-pos)

→ (or/c #f exact-integer?)

start-pos : exact-integer?

Returns the position of the beginning of the next sexpression outside the sexpression that contains start-pos. If there is no such sexpression, it returns #f.

method (send a-racket:text up-sexp start) → void?

start : exact-integer?

Moves backward out of the S-expression containing the position start.

method (send a-racket:text find-down-sexp start-pos)

→ (or/c #f exact-integer?)

start-pos : exact-integer?

Returns the position of the beginning of the next sexpression inside the sexpression that contains start-pos. If there is no such sexpression, it returns #f.

method (send a-racket:text down-sexp start) → void?

start : exact-integer?

Moves forward into the next S-expression after the position start.

method (send a-racket:text remove-parens-forward start) → void?

start : exact-integer?

Removes the parentheses from the S-expression starting after the position start.

method (send a-racket:text select-forward-sexp) → void?

Selects the next S-expression, starting at the start of the current selection.

method (send a-racket:text select-backward-sexp) → void?

Selects the previous S-expression, starting at the start of the current selection.

method (send a-racket:text select-up-sexp) → void?

Selects the region to the enclosing S-expression, starting at the start of the current selection.

method (send a-racket:text select-down-sexp) → void?

Selects the region to the next contained S-expression, starting at the start of the current selection.

method (send a-racket:text transpose-sexp start) → void?

start : exact-integer?

Swaps the S-expression beginning before the position start with the next S-expression following start.

method (send a-racket:text mark-matching-parenthesis pos) → void?

pos : exact-positive-integer?

If the paren after pos is matched, this method highlights it and its matching counterpart in dark green.

method (send a-racket:text get-tab-size) → exact-integer?

This method returns the current size of the tabs for scheme mode. See also set-tab-size.

method (send a-racket:text set-tab-size new-size) → void?

new-size : exact-integer?

This method sets the tab size for this text.

method (send a-racket:text introduce-let-ans start-pos) → void?

start-pos : exact-integer?

Adds a let around the current s-expression and a printf into the body of the let.

method (send a-racket:text move-sexp-out start-pos) → void?

start-pos : exact-integer?

Replaces the sexpression surrounding the insertion point with the sexpression following the insertion point.

method (send a-racket:text get-word-at pos) → string?

pos : exact-positive-integer?

Overrides get-word-at in text:autocomplete<%>.

Returns the word just before pos, which is then used as the prefix for auto-completion.

method (send a-racket:text get-start-of-line pos)

→ exact-nonnegative-integer?

pos : exact-nonnegative-integer?

Overrides get-start-of-line in text:basic<%>.

Returns the first non-whitespace character in the paragraph containing pos, unless the position is already there, in which case it returns the first position of the paragraph.

method (send a-racket:text-mode on-disable-surrogate) → void?

Overrides on-disable-surrogate in mode:surrogate-text<%>.

Removes the scheme keymap (see also racket:get-keymap) and disables any parenthesis highlighting in the host editor.

method (send a-racket:text-mode on-enable-surrogate) → void?

Overrides on-enable-surrogate in mode:surrogate-text<%>.

Adds the scheme keymap (see also racket:get-keymap) and enables a parenthesis highlighting in the host editor.

procedure (racket:text-balanced? text [start end]) → boolean?

text : (is-a?/c text%)

start : number? = 0

end : (or/c false/c number?) = #f

procedure (racket:add-preferences-panel) → void?

procedure (racket:get-keymap) → (is-a?/c keymap%)

procedure (racket:add-coloring-preferences-panel) → any

procedure (racket:get-color-prefs-table)

→ (listof (list/c symbol? (is-a?/c color%) string?))

procedure (racket:get-white-on-black-color-prefs-table)

→ (listof (list/c symbol? (is-a?/c color%) string?))

procedure (racket:short-sym->pref-name short-sym) → symbol?

short-sym : symbol?

procedure (racket:short-sym->style-name short-sym) → string?

short-sym : symbol?

procedure (racket:get-wordbreak-map) → (is-a?/c editor-wordbreak-map%)

procedure (racket:init-wordbreak-map key) → void?

key : (is-a?/c keymap%)

procedure (racket:setup-keymap   keymap      [ #:alt-as-meta-keymap alt-as-meta-keymap])

→ void?

keymap : (is-a?/c keymap%)

alt-as-meta-keymap : (or/c #f (is-a?/c keymap%)) = #f