28 Racket
(send a-scheme:sexp-snip get-saved-snips) → (listof (is-a?/c snip%)) This returns the list of snips hidden by the sexp snip.
| scheme:sexp-snip% : class? | ||||
superclass: snip% | ||||
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(send a-scheme:sexp-snip get-text offset num [ flattened?]) → string? offset : number? num : number? flattened? : boolean? = #f Returns the concatenation of the text for all of the hidden snips.
(send a-scheme:sexp-snip copy) → (is-a?/c scheme:sexp-snip%) Returns a copy of this snip that includes the hidden snips.
(send a-scheme:sexp-snip write stream-out) → void? stream-out : (is-a?/c editor-stream-out%) Saves the embedded snips
(send a-scheme: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? Draws brackets with a centered ellipses between them.
(send a-scheme: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.
| scheme:text<%> : interface? | ||||||
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Texts matching this interface support Racket mode operations.
(send a-scheme:text get-limit start) → exact-integer? start : exact-integer? Returns a limit for backward-matching parenthesis starting at position start.
(send a-scheme: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.
(send a-scheme: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.
(send a-scheme:text tabify [start-pos]) → void? start-pos : exact-integer? = (send this get-start-position) Tabs the line containing by start-pos
(send a-scheme: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.
(send a-scheme:text tabify-all) → void? Tabs all lines.
(send a-scheme:text insert-return) → void? Inserts a newline into the buffer. If tabify-on-return? returns #t, this will tabify the new line.
(send a-scheme: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.
(send a-scheme: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.
(send a-scheme:text uncomment-selection start end) → void? start : exact-integer? end : exact-integer? Uncomments the lines containing positions start through end.
(send a-scheme: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.
(send a-scheme:text remove-sexp start) → void? start : exact-integer? Forward-deletes the S-expression starting after the position start.
(send a-scheme:text forward-sexp start) → void? start : exact-integer? Moves forward over the S-expression starting at position start.
(send a-scheme:text flash-forward-sexp start-pos) → void? start-pos : exact-integer? Flashes the parenthesis that closes the sexpression at start-pos.
(send a-scheme: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.
(send a-scheme:text flash-backward-sexp start-pos) → void? start-pos : exact-integer? Flashes the parenthesis that opens the sexpression at start-pos.
(send a-scheme:text backward-sexp start-pos) → void? start-pos : exact-integer? Move the caret backwards one sexpressionMoves the caret to the beginning of the sexpression that ends at start-pos.
(send a-scheme: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.
(send a-scheme:text up-sexp start) → void? start : exact-integer? Moves backward out of the S-expression containing the position start.
(send a-scheme: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.
(send a-scheme:text down-sexp start) → void? start : exact-integer? Moves forward into the next S-expression after the position start.
(send a-scheme:text remove-parens-forward start) → void? start : exact-integer? Removes the parentheses from the S-expression starting after the position start.
(send a-scheme:text select-forward-sexp) → void? Selects the next S-expression, starting at the start of the current selection.
(send a-scheme:text select-backward-sexp) → void? Selects the previous S-expression, starting at the start of the current selection.
(send a-scheme:text select-up-sexp) → void? Selects the region to the enclosing S-expression, starting at the start of the current selection.
(send a-scheme:text select-down-sexp) → void? Selects the region to the next contained S-expression, starting at the start of the current selection.
(send a-scheme:text transpose-sexp start) → void? start : exact-integer? Swaps the S-expression beginning before the position start with the next S-expression following start.
(send a-scheme: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.
(send a-scheme:text get-tab-size) → exact-integer? This method returns the current size of the tabs for scheme mode. See also set-tab-size.
(send a-scheme:text set-tab-size new-size) → void? new-size : exact-integer? This method sets the tab size for this text.
(send a-scheme: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.
(send a-scheme: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.
| scheme:text-mixin : (class? . -> . class?) | ||||||||
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This mixin adds functionality for editing Racket files.
The result of this mixin uses the same initialization arguments as the
mixin’s argument.
(send a-scheme: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.
(send a-scheme: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.
The result of scheme:text-mode-mixin implements this
interface.
| scheme:text-mode-mixin : (class? . -> . class?) | ||||
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This mixin adds Racket mode functionality to the mode that it is mixed into.
The resulting mode assumes that it is only set to an editor that is the
result of scheme:text-mixin.
(send a-scheme:text-mode on-disable-surrogate) → void? Overrides on-disable-surrogate in mode:surrogate-text<%>.Removes the scheme keymap (see also scheme:get-keymap) and disables any parenthesis highlighting in the host editor.
(send a-scheme:text-mode on-enable-surrogate) → void? Overrides on-enable-surrogate in mode:surrogate-text<%>.Adds the scheme keymap (see also scheme:get-keymap) and enables a parenthesis highlighting in the host editor.
| scheme:set-mode-mixin : (class? . -> . class?) | ||||
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This mixin creates a new instance of scheme:text-mode% and installs
it, by calling its own set-surrogate method with
the object.
| scheme:text% : class? |
superclass: (scheme:set-mode-mixin (scheme:text-mixin (text:autocomplete-mixin (mode:host-text-mixin color:text%)))) |
| scheme:text-mode% : class? |
superclass: (scheme:text-mode-mixin color:text-mode%) |
(scheme:text-balanced? text [start end]) → boolean? text : (is-a?/c text%) start : number? = 0 end : (or/c false/c number?) = #f
Determines if the range in the editor from start to end
in text has at least one complete s-expression and there are no
incomplete s-expressions. If end is #f, it defaults to
the last position of the text. The designation “complete” is
defined to be something that does not cause read to raise a
exn:fail:read:eof? exception, so there may be all kinds of strange
read-level (not to speak of parse level) errors in the expressions.
The implementation of this function creates a port with
open-input-text-editor and then uses read to parse the
range of the buffer.
Adds a tabbing preferences panel to the preferences dialog.
(scheme:get-keymap) → (is-a?/c keymap%)
Returns a keymap with binding suitable for Racket.
Installs the “Racket” preferences panel in the “Syntax Coloring”
section.
Returns a table mapping from symbols (naming the categories that the online
colorer uses for Racket mode coloring) to their colors.
These symbols are suitable for input to scheme:short-sym->pref-name and scheme:short-sym->style-name.
Returns a table mapping from symbols (naming the categories that the online
colorer uses for Racket mode coloring) to their colors when the user
chooses the white-on-black mode in the preferences dialog.
See also scheme:get-color-prefs-table.
(scheme:short-sym->pref-name short-sym) → symbol? short-sym : symbol?
Builds the symbol naming the preference from one of the symbols in the
table returned by scheme:get-color-prefs-table.
(scheme:short-sym->style-name short-sym) → string? short-sym : symbol?
Builds the symbol naming the editor style from one of the symbols in the
table returned by scheme:get-color-prefs-table. This style is a
named style in the style list returned by
editor:get-standard-style-list.
This method returns a editor-wordbreak-map% that is suitable for
Racket.
(scheme:init-wordbreak-map key) → void? key : (is-a?/c keymap%)
Initializes the workdbreak map for keymap.
(scheme:setup-keymap keymap) → void? keymap : (is-a?/c keymap%)
Initializes keymap with Racket-mode keybindings.