# Environment for learning programming using mu. recipe main [ new-default-space open-console initial-recipe:address:array:character <- new [recipe new-add [ x:number <- next-ingredient y:number <- next-ingredient z:number <- add x:number, y:number reply z:number ]] initial-sandbox:address:array:character <- new [new-add 2:literal, 3:literal] env:address:programming-environment-data <- new-programming-environment 0:literal/screen, initial-recipe:address:array:character, initial-sandbox:address:array:character render-all 0:literal/address, env:address:programming-environment-data event-loop 0:literal/screen, 0:literal/console, env:address:programming-environment-data ] container programming-environment-data [ recipes:address:editor-data recipe-warnings:address:array:character current-sandbox:address:editor-data sandbox:address:sandbox-data sandbox-in-focus?:boolean # false => focus in recipes; true => focus in current-sandbox ] recipe new-programming-environment [ new-default-space screen:address <- next-ingredient initial-recipe-contents:address:array:character <- next-ingredient initial-sandbox-contents:address:array:character <- next-ingredient width:number <- screen-width screen:address height:number <- screen-height screen:address # top menu result:address:programming-environment-data <- new programming-environment-data:type draw-horizontal screen:address, 0:literal, 0:literal/left, width:number, 32:literal/space, 0:literal/black, 238:literal/grey button-start:number <- subtract width:number, 20:literal button-on-screen?:boolean <- greater-or-equal button-start:number, 0:literal assert button-on-screen?:boolean, [screen too narrow for menu] move-cursor screen:address, 0:literal/row, button-start:number/column run-button:address:array:character <- new [ run (F10) ] print-string screen:address, run-button:address:array:character, 255:literal/white, 161:literal/reddish # dotted line down the middle divider:number, _ <- divide-with-remainder width:number, 2:literal draw-vertical screen:address, divider:number, 1:literal/top, height:number, 9482:literal/vertical-dotted # recipe editor on the left recipes:address:address:editor-data <- get-address result:address:programming-environment-data/deref, recipes:offset recipes:address:address:editor-data/deref <- new-editor initial-recipe-contents:address:array:character, screen:address, 0:literal/left, divider:number/right # sandbox editor on the right new-left:number <- add divider:number, 1:literal new-right:number <- add new-left:number, 5:literal current-sandbox:address:address:editor-data <- get-address result:address:programming-environment-data/deref, current-sandbox:offset current-sandbox:address:address:editor-data/deref <- new-editor initial-sandbox-contents:address:array:character, screen:address, new-left:number, width:number # initialize cursor update-cursor screen:address, recipes:address:address:editor-data/deref, current-sandbox:address:address:editor-data/deref, 0:literal/focus-in-recipes reply result:address:programming-environment-data ] scenario editor-initially-prints-string-to-screen [ assume-screen 10:literal/width, 5:literal/height run [ 1:address:array:character <- new [abc] new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right ] screen-should-contain [ . . .abc . . . ] ] ## In which we introduce the editor data structure, and show how it displays ## text to the screen. container editor-data [ # editable text: doubly linked list of characters (head contains a special sentinel) data:address:duplex-list # location before cursor inside data before-cursor:address:duplex-list # raw bounds of display area on screen # always displays from row 1 and at most until bottom of screen left:number right:number # raw screen coordinates of cursor cursor-row:number cursor-column:number ] # editor:address, screen:address <- new-editor s:address:array:character, screen:address, left:number, right:number # creates a new editor widget and renders its initial appearance to screen. # top/left/right constrain the screen area available to the new editor. # right is exclusive. recipe new-editor [ new-default-space s:address:array:character <- next-ingredient screen:address <- next-ingredient # no clipping of bounds left:number <- next-ingredient right:number <- next-ingredient right:number <- subtract right:number, 1:literal result:address:editor-data <- new editor-data:type # initialize screen-related fields x:address:number <- get-address result:address:editor-data/deref, left:offset x:address:number/deref <- copy left:number x:address:number <- get-address result:address:editor-data/deref, right:offset x:address:number/deref <- copy right:number # initialize cursor x:address:number <- get-address result:address:editor-data/deref, cursor-row:offset x:address:number/deref <- copy 1:literal/top x:address:number <- get-address result:address:editor-data/deref, cursor-column:offset x:address:number/deref <- copy left:number init:address:address:duplex-list <- get-address result:address:editor-data/deref, data:offset init:address:address:duplex-list/deref <- push-duplex 167:literal/§, 0:literal/tail y:address:address:duplex-list <- get-address result:address:editor-data/deref, before-cursor:offset y:address:address:duplex-list/deref <- copy init:address:address:duplex-list/deref # early exit if s is empty reply-unless s:address:array:character, result:address:editor-data len:number <- length s:address:array:character/deref reply-unless len:number, result:address:editor-data idx:number <- copy 0:literal # now we can start appending the rest, character by character curr:address:duplex-list <- copy init:address:address:duplex-list/deref { done?:boolean <- greater-or-equal idx:number, len:number break-if done?:boolean c:character <- index s:address:array:character/deref, idx:number insert-duplex c:character, curr:address:duplex-list # next iter curr:address:duplex-list <- next-duplex curr:address:duplex-list idx:number <- add idx:number, 1:literal loop } # initialize cursor to top of screen y:address:address:duplex-list <- get-address result:address:editor-data/deref, before-cursor:offset y:address:address:duplex-list/deref <- copy init:address:address:duplex-list/deref # initial render to screen, just for some old tests _, screen:address <- render screen:address, result:address:editor-data reply result:address:editor-data ] scenario editor-initializes-without-data [ assume-screen 5:literal/width, 3:literal/height run [ 1:address:editor-data <- new-editor 0:literal/data, screen:address, 2:literal/left, 5:literal/right 2:editor-data <- copy 1:address:editor-data/deref ] memory-should-contain [ # 2 (data) <- just the § sentinel # 3 (before cursor) <- the § sentinel 4 <- 2 # left 5 <- 4 # right (inclusive) 6 <- 1 # cursor row 7 <- 2 # cursor column ] screen-should-contain [ . . . . . . ] ] # bottom:number, screen:address <- render screen:address, editor:address:editor-data recipe render [ new-default-space screen:address <- next-ingredient editor:address:editor-data <- next-ingredient reply-unless editor:address:editor-data, 1:literal/top, screen:address/same-as-ingredient:0 left:number <- get editor:address:editor-data/deref, left:offset screen-height:number <- screen-height screen:address right:number <- get editor:address:editor-data/deref, right:offset hide-screen screen:address # traversing editor curr:address:duplex-list <- get editor:address:editor-data/deref, data:offset prev:address:duplex-list <- copy curr:address:duplex-list curr:address:duplex-list <- next-duplex curr:address:duplex-list # traversing screen row:number <- copy 1:literal/top column:number <- copy left:number cursor-row:address:number <- get-address editor:address:editor-data/deref, cursor-row:offset cursor-column:address:number <- get-address editor:address:editor-data/deref, cursor-column:offset before-cursor:address:address:duplex-list <- get-address editor:address:editor-data/deref, before-cursor:offset move-cursor screen:address, row:number, column:number { +next-character break-unless curr:address:duplex-list off-screen?:boolean <- greater-or-equal row:number, screen-height:number break-if off-screen?:boolean # update editor-data.before-cursor # Doing so at the start of each iteration ensures it stays one step behind # the current character. { at-cursor-row?:boolean <- equal row:number, cursor-row:address:number/deref break-unless at-cursor-row?:boolean at-cursor?:boolean <- equal column:number, cursor-column:address:number/deref break-unless at-cursor?:boolean before-cursor:address:address:duplex-list/deref <- prev-duplex curr:address:duplex-list } c:character <- get curr:address:duplex-list/deref, value:offset { # newline? move to left rather than 0 newline?:boolean <- equal c:character, 10:literal/newline break-unless newline?:boolean # adjust cursor if necessary { at-cursor-row?:boolean <- equal row:number, cursor-row:address:number/deref break-unless at-cursor-row?:boolean left-of-cursor?:boolean <- lesser-than column:number, cursor-column:address:number/deref break-unless left-of-cursor?:boolean cursor-column:address:number/deref <- copy column:number before-cursor:address:address:duplex-list/deref <- prev-duplex curr:address:duplex-list } # clear rest of line in this window clear-line-delimited screen:address, column:number, right:number # skip to next line row:number <- add row:number, 1:literal column:number <- copy left:number move-cursor screen:address, row:number, column:number curr:address:duplex-list <- next-duplex curr:address:duplex-list prev:address:duplex-list <- next-duplex prev:address:duplex-list loop +next-character:label } { # at right? wrap. even if there's only one more letter left; we need # room for clicking on the cursor after it. at-right?:boolean <- equal column:number, right:number break-unless at-right?:boolean # print wrap icon print-character screen:address, 8617:literal/loop-back-to-left, 245:literal/grey column:number <- copy left:number row:number <- add row:number, 1:literal move-cursor screen:address, row:number, column:number # don't increment curr loop +next-character:label } print-character screen:address, c:character curr:address:duplex-list <- next-duplex curr:address:duplex-list prev:address:duplex-list <- next-duplex prev:address:duplex-list column:number <- add column:number, 1:literal loop } # is cursor to the right of the last line? move to end { at-cursor-row?:boolean <- equal row:number, cursor-row:address:number/deref cursor-outside-line?:boolean <- lesser-or-equal column:number, cursor-column:address:number/deref before-cursor-on-same-line?:boolean <- and at-cursor-row?:boolean, cursor-outside-line?:boolean above-cursor-row?:boolean <- lesser-than row:number, cursor-row:address:number/deref before-cursor?:boolean <- or before-cursor-on-same-line?:boolean, above-cursor-row?:boolean break-unless before-cursor?:boolean cursor-row:address:number/deref <- copy row:number cursor-column:address:number/deref <- copy column:number # line not wrapped but cursor outside bounds? wrap cursor { too-far-right?:boolean <- greater-than cursor-column:address:number/deref, right:number break-unless too-far-right?:boolean cursor-column:address:number/deref <- copy left:number cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal above-screen-bottom?:boolean <- lesser-than cursor-row:address:number/deref, screen-height:number assert above-screen-bottom?:boolean, [unimplemented: wrapping cursor past bottom of screen] } before-cursor:address:address:duplex-list/deref <- copy prev:address:duplex-list } # clear rest of current line clear-line-delimited screen:address, column:number, right:number reply row:number, screen:address/same-as-ingredient:0 ] # row:number, screen:address <- render-string screen:address, s:address:array:character, left:number, right:number, color:number, row:number # print a string 's' to 'editor' in 'color' starting at 'row' # leave cursor at start of next line recipe render-string [ new-default-space screen:address <- next-ingredient s:address:array:character <- next-ingredient left:number <- next-ingredient right:number <- next-ingredient color:number <- next-ingredient row:number <- next-ingredient row:number <- add row:number, 1:literal reply-unless s:address:array:character, row:number/same-as-ingredient:5, screen:address/same-as-ingredient:0 column:number <- copy left:number move-cursor screen:address, row:number, column:number screen-height:number <- screen-height screen:address i:number <- copy 0:literal len:number <- length s:address:array:character/deref { +next-character done?:boolean <- greater-or-equal i:number, len:number break-if done?:boolean done?:boolean <- greater-or-equal row:number, screen-height:number break-if done?:boolean c:character <- index s:address:array:character/deref, i:number { # at right? wrap. at-right?:boolean <- equal column:number, right:number break-unless at-right?:boolean # print wrap icon print-character screen:address, 8617:literal/loop-back-to-left, 245:literal/grey column:number <- copy left:number row:number <- add row:number, 1:literal move-cursor screen:address, row:number, column:number loop +next-character:label # retry i } i:number <- add i:number, 1:literal { # newline? move to left rather than 0 newline?:boolean <- equal c:character, 10:literal/newline break-unless newline?:boolean # clear rest of line in this window { done?:boolean <- greater-than column:number, right:number break-if done?:boolean print-character screen:address, 32:literal/space column:number <- add column:number, 1:literal loop } row:number <- add row:number, 1:literal column:number <- copy left:number move-cursor screen:address, row:number, column:number loop +next-character:label } print-character screen:address, c:character, color:number column:number <- add column:number, 1:literal loop } { # clear rest of current line line-done?:boolean <- greater-than column:number, right:number break-if line-done?:boolean print-character screen:address, 32:literal/space column:number <- add column:number, 1:literal loop } reply row:number/same-as-ingredient:5, screen:address/same-as-ingredient:0 ] recipe clear-line-delimited [ new-default-space screen:address <- next-ingredient left:number <- next-ingredient right:number <- next-ingredient column:number <- copy left:number { done?:boolean <- greater-than column:number, right:number break-if done?:boolean print-character screen:address, 32:literal/space column:number <- add column:number, 1:literal loop } ] scenario editor-initially-prints-multiple-lines [ assume-screen 5:literal/width, 5:literal/height run [ s:address:array:character <- new [abc def] new-editor s:address:array:character, screen:address, 0:literal/left, 5:literal/right ] screen-should-contain [ . . .abc . .def . . . ] ] scenario editor-initially-handles-offsets [ assume-screen 5:literal/width, 5:literal/height run [ s:address:array:character <- new [abc] new-editor s:address:array:character, screen:address, 1:literal/left, 5:literal/right ] screen-should-contain [ . . . abc . . . ] ] scenario editor-initially-prints-multiple-lines-at-offset [ assume-screen 5:literal/width, 5:literal/height run [ s:address:array:character <- new [abc def] new-editor s:address:array:character, screen:address, 1:literal/left, 5:literal/right ] screen-should-contain [ . . . abc . . def . . . ] ] scenario editor-initially-wraps-long-lines [ assume-screen 5:literal/width, 5:literal/height run [ s:address:array:character <- new [abc def] new-editor s:address:array:character, screen:address, 0:literal/left, 5:literal/right ] screen-should-contain [ . . .abc ↩. .def . . . ] screen-should-contain-in-color, 245:literal/grey [ . . . ↩. . . . . ] ] scenario editor-initially-wraps-barely-long-lines [ assume-screen 5:literal/width, 5:literal/height run [ s:address:array:character <- new [abcde] new-editor s:address:array:character, screen:address, 0:literal/left, 5:literal/right ] # still wrap, even though the line would fit. We need room to click on the # end of the line screen-should-contain [ . . .abcd↩. .e . . . ] screen-should-contain-in-color, 245:literal/grey [ . . . ↩. . . . . ] ] scenario editor-initializes-empty-text [ assume-screen 5:literal/width, 5:literal/height run [ 1:address:array:character <- new [] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . . . . . ] memory-should-contain [ 3 <- 1 # cursor row 4 <- 0 # cursor column ] ] ## handling events from the keyboard, mouse, touch screen, ... recipe event-loop [ new-default-space screen:address <- next-ingredient console:address <- next-ingredient env:address:programming-environment-data <- next-ingredient recipes:address:editor-data <- get env:address:programming-environment-data/deref, recipes:offset current-sandbox:address:editor-data <- get env:address:programming-environment-data/deref, current-sandbox:offset sandbox-in-focus?:address:boolean <- get-address env:address:programming-environment-data/deref, sandbox-in-focus?:offset { # looping over each (keyboard or touch) event as it occurs +next-event e:event, console:address, found?:boolean, quit?:boolean <- read-event console:address loop-unless found?:boolean break-if quit?:boolean # only in tests trace [app], [next-event] # check for global events that will trigger regardless of which editor has focus { k:address:number <- maybe-convert e:event, keycode:variant break-unless k:address:number # F10? load all code and run all sandboxes. { do-run?:boolean <- equal k:address:number/deref, 65526:literal/F10 break-unless do-run?:boolean run-sandboxes env:address:programming-environment-data jump +continue:label } } # 'touch' event - send to both editors { t:address:touch-event <- maybe-convert e:event, touch:variant break-unless t:address:touch-event _ <- move-cursor-in-editor screen:address, recipes:address:editor-data, t:address:touch-event/deref sandbox-in-focus?:address:boolean/deref <- move-cursor-in-editor screen:address, current-sandbox:address:editor-data, t:address:touch-event/deref jump +continue:label } # if it's not global, send to appropriate editor { { break-if sandbox-in-focus?:address:boolean/deref handle-event screen:address, console:address, recipes:address:editor-data, e:event } { break-unless sandbox-in-focus?:address:boolean/deref handle-event screen:address, console:address, current-sandbox:address:editor-data, e:event } } +continue # if no more events currently left to process, render # todo: test this { more-events?:boolean <- has-more-events? console:address break-if more-events?:boolean render-all screen:address, env:address:programming-environment-data } loop } ] # helper for testing a single editor recipe editor-event-loop [ new-default-space screen:address <- next-ingredient console:address <- next-ingredient editor:address:editor-data <- next-ingredient { # looping over each (keyboard or touch) event as it occurs +next-event e:event, console:address, found?:boolean, quit?:boolean <- read-event console:address loop-unless found?:boolean break-if quit?:boolean # only in tests trace [app], [next-event] # 'touch' event - send to both editors { t:address:touch-event <- maybe-convert e:event, touch:variant break-unless t:address:touch-event move-cursor-in-editor screen:address, editor:address:editor-data, t:address:touch-event/deref jump +continue:label } # other events - send to appropriate editor handle-event screen:address, console:address, editor:address:editor-data, e:event +continue row:number, screen:address <- render screen:address, editor:address:editor-data # clear next line, in case we just processed a backspace left:number <- get editor:address:editor-data/deref, left:offset right:number <- get editor:address:editor-data/deref, right:offset row:number <- add row:number, 1:literal move-cursor screen:address, row:number, left:number clear-line-delimited screen:address, left:number, right:number loop } ] recipe handle-event [ new-default-space screen:address <- next-ingredient console:address <- next-ingredient editor:address:editor-data <- next-ingredient e:event <- next-ingredient reply-unless editor:address:editor-data # typing a character { c:address:character <- maybe-convert e:event, text:variant break-unless c:address:character # unless it's a backspace { backspace?:boolean <- equal c:address:character/deref, 8:literal/backspace break-unless backspace?:boolean delete-before-cursor editor:address:editor-data reply } insert-at-cursor editor:address:editor-data, c:address:character/deref, screen:address reply } # otherwise it's a special key to control the editor k:address:number <- maybe-convert e:event, keycode:variant assert k:address:number, [event was of unknown type; neither keyboard nor mouse] d:address:duplex-list <- get editor:address:editor-data/deref, data:offset before-cursor:address:address:duplex-list <- get-address editor:address:editor-data/deref, before-cursor:offset cursor-row:address:number <- get-address editor:address:editor-data/deref, cursor-row:offset cursor-column:address:number <- get-address editor:address:editor-data/deref, cursor-column:offset screen-height:number <- screen-height screen:address left:number <- get editor:address:editor-data/deref, left:offset right:number <- get editor:address:editor-data/deref, right:offset # arrows; update cursor-row and cursor-column, leave before-cursor to 'render'. # right arrow { move-to-next-character?:boolean <- equal k:address:number/deref, 65514:literal/right-arrow break-unless move-to-next-character?:boolean # if not at end of text old-cursor:address:duplex-list <- next-duplex before-cursor:address:address:duplex-list/deref break-unless old-cursor:address:duplex-list # scan to next character before-cursor:address:address:duplex-list/deref <- copy old-cursor:address:duplex-list # if crossed a newline, move cursor to start of next row { old-cursor-character:character <- get before-cursor:address:address:duplex-list/deref/deref, value:offset was-at-newline?:boolean <- equal old-cursor-character:character, 10:literal/newline break-unless was-at-newline?:boolean cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal cursor-column:address:number/deref <- copy left:number # todo: what happens when cursor is too far down? screen-height:number <- screen-height screen:address above-screen-bottom?:boolean <- lesser-than cursor-row:address:number/deref, screen-height:number assert above-screen-bottom?:boolean, [unimplemented: moving past bottom of screen] reply } # if the line wraps, move cursor to start of next row { # if we're at the column just before the wrap indicator wrap-column:number <- subtract right:number, 1:literal at-wrap?:boolean <- equal cursor-column:address:number/deref, wrap-column:number break-unless at-wrap?:boolean # and if next character isn't newline new-cursor:address:duplex-list <- next-duplex old-cursor:address:duplex-list break-unless new-cursor:address:duplex-list next-character:character <- get new-cursor:address:duplex-list/deref, value:offset newline?:boolean <- equal next-character:character, 10:literal/newline break-if newline?:boolean cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal cursor-column:address:number/deref <- copy left:number # todo: what happens when cursor is too far down? above-screen-bottom?:boolean <- lesser-than cursor-row:address:number/deref, screen-height:number assert above-screen-bottom?:boolean, [unimplemented: moving past bottom of screen] reply } # otherwise move cursor one character right cursor-column:address:number/deref <- add cursor-column:address:number/deref, 1:literal } # left arrow { move-to-previous-character?:boolean <- equal k:address:number/deref, 65515:literal/left-arrow break-unless move-to-previous-character?:boolean #? trace [app], [left arrow] #? 1 # if not at start of text (before-cursor at § sentinel) prev:address:duplex-list <- prev-duplex before-cursor:address:address:duplex-list/deref break-unless prev:address:duplex-list # if cursor not at left margin, move one character left { at-left-margin?:boolean <- equal cursor-column:address:number/deref, 0:literal break-if at-left-margin?:boolean #? trace [app], [decrementing] #? 1 cursor-column:address:number/deref <- subtract cursor-column:address:number/deref, 1:literal reply } # if at left margin, there's guaranteed to be a previous line, since we're # not at start of text { # if before-cursor is at newline, figure out how long the previous line is prevc:character <- get before-cursor:address:address:duplex-list/deref/deref, value:offset previous-character-is-newline?:boolean <- equal prevc:character, 10:literal/newline break-unless previous-character-is-newline?:boolean #? trace [app], [previous line] #? 1 # compute length of previous line end-of-line:number <- previous-line-length before-cursor:address:address:duplex-list/deref, d:address:duplex-list cursor-row:address:number/deref <- subtract cursor-row:address:number/deref, 1:literal cursor-column:address:number/deref <- copy end-of-line:number reply } # if before-cursor is not at newline, we're just at a wrapped line assert cursor-row:address:number/deref, [unimplemented: moving cursor above top of screen] cursor-row:address:number/deref <- subtract cursor-row:address:number/deref, 1:literal cursor-column:address:number/deref <- subtract right:number, 1:literal # leave room for wrap icon } # down arrow { move-to-next-line?:boolean <- equal k:address:number/deref, 65516:literal/down-arrow break-unless move-to-next-line?:boolean # todo: support scrolling already-at-bottom?:boolean <- greater-or-equal cursor-row:address:number/deref, screen-height:number break-if already-at-bottom?:boolean #? $print [moving down #? ] #? 1 cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal # that's it; render will adjust cursor-column as necessary } # up arrow { move-to-previous-line?:boolean <- equal k:address:number/deref, 65517:literal/up-arrow break-unless move-to-previous-line?:boolean # todo: support scrolling already-at-top?:boolean <- lesser-or-equal cursor-row:address:number/deref, 1:literal/top break-if already-at-top?:boolean #? $print [moving up #? ] #? 1 cursor-row:address:number/deref <- subtract cursor-row:address:number/deref, 1:literal # that's it; render will adjust cursor-column as necessary } ] # process click, return if it was on current editor # todo: ignores menu bar (for now just displays shortcuts) recipe move-cursor-in-editor [ new-default-space screen:address <- next-ingredient editor:address:editor-data <- next-ingredient t:touch-event <- next-ingredient reply-unless editor:address:editor-data, 0:literal/false click-column:number <- get t:touch-event, column:offset left:number <- get editor:address:editor-data/deref, left:offset too-far-left?:boolean <- lesser-than click-column:number, left:number reply-if too-far-left?:boolean, 0:literal/false right:number <- get editor:address:editor-data/deref, right:offset too-far-right?:boolean <- greater-than click-column:number, right:number reply-if too-far-right?:boolean, 0:literal/false # update cursor cursor-row:address:number <- get-address editor:address:editor-data/deref, cursor-row:offset cursor-row:address:number/deref <- get t:touch-event, row:offset cursor-column:address:number <- get-address editor:address:editor-data/deref, cursor-column:offset cursor-column:address:number/deref <- get t:touch-event, column:offset render screen:address, editor:address:editor-data # gain focus reply 1:literal/true ] recipe insert-at-cursor [ new-default-space editor:address:editor-data <- next-ingredient c:character <- next-ingredient screen:address <- next-ingredient #? $print [insert ], c:character, [ #? ] #? 1 before-cursor:address:address:duplex-list <- get-address editor:address:editor-data/deref, before-cursor:offset d:address:duplex-list <- get editor:address:editor-data/deref, data:offset insert-duplex c:character, before-cursor:address:address:duplex-list/deref before-cursor:address:address:duplex-list/deref <- next-duplex before-cursor:address:address:duplex-list/deref cursor-row:address:number <- get-address editor:address:editor-data/deref, cursor-row:offset cursor-column:address:number <- get-address editor:address:editor-data/deref, cursor-column:offset left:number <- get editor:address:editor-data/deref, left:offset right:number <- get editor:address:editor-data/deref, right:offset # update cursor: if newline, move cursor to start of next line # todo: bottom of screen { newline?:boolean <- equal c:character, 10:literal/newline break-unless newline?:boolean cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal cursor-column:address:number/deref <- copy left:number reply } # if the line wraps at the cursor, move cursor to start of next row { # if we're at the column just before the wrap indicator wrap-column:number <- subtract right:number, 1:literal #? $print [wrap? ], cursor-column:address:number/deref, [ vs ], wrap-column:number, [ #? ] #? 1 at-wrap?:boolean <- greater-or-equal cursor-column:address:number/deref, wrap-column:number break-unless at-wrap?:boolean #? $print [wrap! #? ] #? 1 cursor-column:address:number/deref <- subtract cursor-column:address:number/deref, wrap-column:number cursor-row:address:number/deref <- add cursor-row:address:number/deref, 1:literal # todo: what happens when cursor is too far down? screen-height:number <- screen-height screen:address above-screen-bottom?:boolean <- lesser-than cursor-row:address:number/deref, screen-height:number assert above-screen-bottom?:boolean, [unimplemented: typing past bottom of screen] #? $print [return #? ] #? 1 reply } # otherwise move cursor right cursor-column:address:number/deref <- add cursor-column:address:number/deref, 1:literal ] recipe delete-before-cursor [ new-default-space editor:address:editor-data <- next-ingredient before-cursor:address:address:duplex-list <- get-address editor:address:editor-data/deref, before-cursor:offset d:address:duplex-list <- get editor:address:editor-data/deref, data:offset # unless already at start at-start?:boolean <- equal before-cursor:address:address:duplex-list/deref, d:address:duplex-list reply-if at-start?:boolean # delete character prev:address:duplex-list <- prev-duplex before-cursor:address:address:duplex-list/deref remove-duplex before-cursor:address:address:duplex-list/deref # update cursor before-cursor:address:address:duplex-list/deref <- copy prev:address:duplex-list cursor-column:address:number <- get-address editor:address:editor-data/deref, cursor-column:offset cursor-column:address:number/deref <- subtract cursor-column:address:number/deref, 1:literal #? $print [delete-before-cursor: ], cursor-column:address:number/deref, [ #? ] #? 1 ] # takes a pointer 'curr' into the doubly-linked list and its sentinel, counts # the length of the previous line before the 'curr' pointer. recipe previous-line-length [ new-default-space curr:address:duplex-list <- next-ingredient start:address:duplex-list <- next-ingredient result:number <- copy 0:literal reply-unless curr:address:duplex-list, result:number at-start?:boolean <- equal curr:address:duplex-list, start:address:duplex-list reply-if at-start?:boolean, result:number { curr:address:duplex-list <- prev-duplex curr:address:duplex-list break-unless curr:address:duplex-list at-start?:boolean <- equal curr:address:duplex-list, start:address:duplex-list break-if at-start?:boolean c:character <- get curr:address:duplex-list/deref, value:offset at-newline?:boolean <- equal c:character 10:literal/newline break-if at-newline?:boolean result:number <- add result:number, 1:literal loop } reply result:number ] recipe render-all [ new-default-space screen:address <- next-ingredient env:address:programming-environment-data <- next-ingredient recipes:address:editor-data <- get env:address:programming-environment-data/deref, recipes:offset current-sandbox:address:editor-data <- get env:address:programming-environment-data/deref, current-sandbox:offset sandbox-in-focus?:boolean <- get env:address:programming-environment-data/deref, sandbox-in-focus?:offset # render recipes, along with any warnings left:number <- get recipes:address:editor-data/deref, left:offset right:number <- get recipes:address:editor-data/deref, right:offset row:number, screen:address <- render screen:address, recipes:address:editor-data recipe-warnings:address:array:character <- get env:address:programming-environment-data/deref, recipe-warnings:offset { break-unless recipe-warnings:address:array:character row:number, screen:address <- render-string screen:address, recipe-warnings:address:array:character, left:number, right:number, 1:literal/red, row:number } { # no warnings? move to next lin break-if recipe-warnings:address:array:character row:number <- add row:number, 1:literal } # draw dotted line after recipes draw-horizontal screen:address, row:number, left:number, right:number, 9480:literal/horizontal-dotted # clear next line, in case we just processed a backspace row:number <- add row:number, 1:literal move-cursor screen:address, row:number, left:number clear-line-delimited screen:address, left:number, right:number # render sandboxes along with warnings for each left:number <- get current-sandbox:address:editor-data/deref, left:offset right:number <- get current-sandbox:address:editor-data/deref, right:offset row:number, screen:address <- render screen:address, current-sandbox:address:editor-data row:number <- add row:number, 1:literal draw-horizontal screen:address, row:number, left:number, right:number, 9473:literal/horizontal-double sandbox:address:sandbox-data <- get env:address:programming-environment-data/deref, sandbox:offset row:number, screen:address <- render-sandboxes screen:address, sandbox:address:sandbox-data, left:number, right:number, row:number # clear next line, in case we just processed a backspace row:number <- add row:number, 1:literal move-cursor screen:address, row:number, left:number clear-line-delimited screen:address, left:number, right:number update-cursor screen:address, recipes:address:editor-data, current-sandbox:address:editor-data, sandbox-in-focus?:boolean show-screen screen:address reply screen:address/same-as-ingredient:0 ] recipe render-sandboxes [ new-default-space screen:address <- next-ingredient sandbox:address:sandbox-data <- next-ingredient left:number <- next-ingredient right:number <- next-ingredient row:number <- next-ingredient reply-unless sandbox:address:sandbox-data, row:number/same-as-ingredient:4, screen:address/same-as-ingredient:0 screen-height:number <- screen-width screen:address at-bottom?:boolean <- greater-or-equal row:number screen-height:number reply-if at-bottom?:boolean, row:number/same-as-ingredient:4, screen:address/same-as-ingredient:0 # render sandbox contents sandbox-data:address:array:character <- get sandbox:address:sandbox-data/deref, data:offset row:number, screen:address <- render-string screen:address, sandbox-data:address:array:character, left:number, right:number, 7:literal/white, row:number # render sandbox warnings or response, in that order sandbox-response:address:array:character <- get sandbox:address:sandbox-data/deref, response:offset sandbox-warnings:address:array:character <- get sandbox:address:sandbox-data/deref, warnings:offset { break-unless sandbox-warnings:address:array:character row:number, screen:address <- render-string screen:address, sandbox-warnings:address:array:character, left:number, right:number, 1:literal/red, row:number } { break-if sandbox-warnings:address:array:character row:number, screen:address <- render-string screen:address, sandbox-response:address:array:character, left:number, right:number, 245:literal/grey, row:number } # draw solid line after sandbox draw-horizontal screen:address, row:number, left:number, right:number, 9473:literal/horizontal-double # draw next sandbox next-sandbox:address:sandbox-data <- get sandbox:address:sandbox-data/deref, next-sandbox:offset row:number, screen:address <- render-sandboxes screen:address, next-sandbox:address:sandbox-data, left:number, right:number, row:number reply row:number/same-as-ingredient:4, screen:address/same-as-ingredient:0 ] recipe update-cursor [ new-default-space screen:address <- next-ingredient recipes:address:editor-data <- next-ingredient current-sandbox:address:editor-data <- next-ingredient sandbox-in-focus?:boolean <- next-ingredient { break-if sandbox-in-focus?:boolean #? $print [recipes in focus #? ] #? 1 cursor-row:number <- get recipes:address:editor-data/deref, cursor-row:offset cursor-column:number <- get recipes:address:editor-data/deref, cursor-column:offset } { break-unless sandbox-in-focus?:boolean #? $print [sandboxes in focus #? ] #? 1 cursor-row:number <- get current-sandbox:address:editor-data/deref, cursor-row:offset cursor-column:number <- get current-sandbox:address:editor-data/deref, cursor-column:offset } move-cursor screen:address, cursor-row:number, cursor-column:number ] scenario editor-handles-empty-event-queue [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . . . ] ] scenario editor-handles-mouse-clicks [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 1 # on the 'b' ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .abc . . . ] memory-should-contain [ 3 <- 1 # cursor is at row 0.. 4 <- 1 # ..and column 1 ] ] scenario editor-handles-mouse-clicks-outside-text [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 7 # last line, to the right of text ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 # cursor row 4 <- 3 # cursor column ] ] scenario editor-handles-mouse-clicks-outside-text-2 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc def] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 7 # interior line, to the right of text ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 # cursor row 4 <- 3 # cursor column ] ] scenario editor-handles-mouse-clicks-outside-text-3 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc def] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 3, 7 # below text ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 2 # cursor row 4 <- 3 # cursor column ] ] scenario editor-handles-mouse-clicks-outside-column [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] # editor occupies only left half of screen 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ # click on right half of screen left-click 3, 8 ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .abc . . . ] memory-should-contain [ 3 <- 1 # no change to cursor row 4 <- 0 # ..or column ] ] scenario editor-inserts-characters-into-empty-editor [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ type [abc] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . . . ] ] scenario editor-inserts-characters-at-cursor [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ type [0] left-click 1, 2 type [d] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .0adbc . . . ] ] scenario editor-inserts-characters-at-cursor-2 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 5 # right of last line type [d] # should append ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abcd . . . ] ] scenario editor-inserts-characters-at-cursor-3 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 3, 5 # below all text type [d] # should append ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abcd . . . ] ] scenario editor-inserts-characters-at-cursor-4 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 3, 5 # below all text type [e] # should append ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .de . . . ] ] scenario editor-inserts-characters-at-cursor-5 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 3, 5 # below all text type [ef] # should append multiple characters in order ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .def . . . ] ] scenario editor-wraps-line-on-insert [ assume-screen 5:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right # type a letter assume-console [ type [e] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] # no wrap yet screen-should-contain [ . . .eabc . . . . . ] # type a second letter assume-console [ type [f] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] # now wrap screen-should-contain [ . . .efab↩. .c . . . ] ] scenario editor-moves-cursor-after-inserting-characters [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [ab] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ type [01] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .01ab . . . ] ] scenario editor-wraps-cursor-after-inserting-characters [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abcde] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ left-click 1, 4 # line is full; no wrap icon yet type [f] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .abcd↩ . .fe . . . ] memory-should-contain [ 3 <- 2 # cursor row 4 <- 1 # cursor column ] ] scenario editor-wraps-cursor-after-inserting-characters-2 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abcde] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ left-click 1, 3 # right before the wrap icon type [f] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .abcf↩ . .de . . . ] memory-should-contain [ 3 <- 2 # cursor row 4 <- 0 # cursor column ] ] scenario editor-moves-cursor-down-after-inserting-newline [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ type [0 1] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .0 . .1abc . . . ] ] scenario editor-moves-cursor-down-after-inserting-newline-2 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 1:literal/left, 10:literal/right assume-console [ type [0 1] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . . 0 . . 1abc . . . ] ] scenario editor-clears-previous-line-completely-after-inserting-newline [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abcde] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right # press just a 'newline' assume-console [ type [ ] ] screen-should-contain [ . . .abcd↩ . .e . . . . . ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] # line should be fully cleared screen-should-contain [ . . . . .abcd↩ . .e . . . ] ] scenario editor-handles-backspace-key [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 1 type [«] ] 3:event/backspace <- merge 0:literal/text, 8:literal/backspace, 0:literal/dummy, 0:literal/dummy replace-in-console 171:literal/«, 3:event/backspace run [ editor-event-loop screen:address, console:address, 2:address:editor-data 4:number <- get 2:address:editor-data/deref, cursor-row:offset 5:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .bc . . . ] memory-should-contain [ 4 <- 1 5 <- 0 ] ] scenario editor-clears-last-line-on-backspace [ assume-screen 10:literal/width, 5:literal/height # just one character in final line 1:address:array:character <- new [ab cd] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ left-click 2, 0 # cursor at only character in final line type [«] ] 3:event/backspace <- merge 0:literal/text, 8:literal/backspace, 0:literal/dummy, 0:literal/dummy replace-in-console 171:literal/«, 3:event/backspace run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abcd . . . ] ] scenario editor-moves-cursor-right-with-key [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ press 65514 # right arrow type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .a0bc . . . ] ] scenario editor-moves-cursor-to-next-line-with-right-arrow [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ press 65514 # right arrow press 65514 # right arrow press 65514 # right arrow press 65514 # right arrow - next line type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .0d . . . ] ] scenario editor-moves-cursor-to-next-line-with-right-arrow-2 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 1:literal/left, 10:literal/right assume-console [ press 65514 # right arrow press 65514 # right arrow press 65514 # right arrow press 65514 # right arrow - next line type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . . abc . . 0d . . . ] ] scenario editor-moves-cursor-to-next-wrapped-line-with-right-arrow [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abcdef] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right assume-console [ left-click 1, 3 press 65514 # right arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . .abcd↩ . .ef . . . ] memory-should-contain [ 3 <- 2 4 <- 0 ] ] scenario editor-moves-cursor-to-next-wrapped-line-with-right-arrow-2 [ assume-screen 10:literal/width, 5:literal/height # line just barely wrapping 1:address:array:character <- new [abcde] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right # position cursor at last character before wrap and hit right-arrow assume-console [ left-click 1, 3 press 65514 # right arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 2 4 <- 0 ] # now hit right arrow again assume-console [ press 65514 ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 2 4 <- 1 ] ] scenario editor-moves-cursor-to-next-wrapped-line-with-right-arrow-3 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abcdef] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 1:literal/left, 6:literal/right assume-console [ left-click 1, 4 press 65514 # right arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . . . abcd↩ . . ef . . . ] memory-should-contain [ 3 <- 2 4 <- 1 ] ] scenario editor-moves-cursor-to-next-line-with-right-arrow-at-end-of-line [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 3 press 65514 # right arrow - next line type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .0d . . . ] ] scenario editor-moves-cursor-left-with-key [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 2 press 65515 # left arrow type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .a0bc . . . ] ] scenario editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line [ assume-screen 10:literal/width, 5:literal/height # initialize editor with two lines 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right # position cursor at start of second line (so there's no previous newline) assume-console [ left-click 2, 0 press 65515 # left arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 4 <- 3 ] ] scenario editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-2 [ assume-screen 10:literal/width, 5:literal/height # initialize editor with three lines 1:address:array:character <- new [abc def g] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right # position cursor further down (so there's a newline before the character at # the cursor) assume-console [ left-click 3, 0 press 65515 # left arrow type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .def0 . .g . . . ] ] scenario editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-3 [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc def g] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right # position cursor at start of text assume-console [ left-click 1, 0 press 65515 # left arrow should have no effect type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .0abc . .def . .g . . . ] ] scenario editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-4 [ assume-screen 10:literal/width, 5:literal/height # initialize editor with text containing an empty line 1:address:array:character <- new [abc d] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right # position cursor right after empty line assume-console [ left-click 3, 0 press 65515 # left arrow type [0] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data ] screen-should-contain [ . . .abc . .0 . .d . . . ] ] scenario editor-moves-across-screen-lines-across-wrap-with-left-arrow [ assume-screen 10:literal/width, 5:literal/height # initialize editor with text containing an empty line 1:address:array:character <- new [abcdef] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 5:literal/right screen-should-contain [ . . .abcd↩ . .ef . . . ] # position cursor right after empty line assume-console [ left-click 2, 0 press 65515 # left arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 # previous row 4 <- 3 # end of wrapped line ] ] scenario editor-moves-to-previous-line-with-up-arrow [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc def] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 2, 1 press 65517 # up arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 4 <- 1 ] ] scenario editor-moves-to-next-line-with-down-arrow [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc def] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right # cursor starts out at (1, 0) assume-console [ press 65516 # down arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] # ..and ends at (2, 0) memory-should-contain [ 3 <- 2 4 <- 0 ] ] scenario editor-adjusts-column-at-previous-line [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [ab def] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 2, 3 press 65517 # up arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 1 4 <- 2 ] ] scenario editor-adjusts-column-at-next-line [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc de] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 3 press 65516 # down arrow ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:number <- get 2:address:editor-data/deref, cursor-row:offset 4:number <- get 2:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 3 <- 2 4 <- 2 ] ] scenario point-at-multiple-editors [ assume-screen 30:literal/width, 5:literal/height # initialize both halves of screen 1:address:array:character <- new [abc] 2:address:array:character <- new [def] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character # focus on both sides assume-console [ left-click 1, 1 left-click 1, 17 ] # check cursor column in each run [ event-loop screen:address, console:address, 3:address:programming-environment-data 4:address:editor-data <- get 3:address:programming-environment-data/deref, recipes:offset 5:number <- get 4:address:editor-data/deref, cursor-column:offset 6:address:editor-data <- get 3:address:programming-environment-data/deref, current-sandbox:offset 7:number <- get 6:address:editor-data/deref, cursor-column:offset ] memory-should-contain [ 5 <- 1 7 <- 17 ] ] scenario edit-multiple-editors [ assume-screen 30:literal/width, 5:literal/height # initialize both halves of screen 1:address:array:character <- new [abc] 2:address:array:character <- new [def] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character # type one letter in each of them assume-console [ left-click 1, 1 type [0] left-click 1, 17 type [1] ] run [ event-loop screen:address, console:address, 3:address:programming-environment-data 4:address:editor-data <- get 3:address:programming-environment-data/deref, recipes:offset 5:number <- get 4:address:editor-data/deref, cursor-column:offset 6:address:editor-data <- get 3:address:programming-environment-data/deref, current-sandbox:offset 7:number <- get 6:address:editor-data/deref, cursor-column:offset ] screen-should-contain [ . run (F10) . # this line has a different background, but we don't test that yet .a0bc ┊d1ef . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━. . ┊ . ] memory-should-contain [ 5 <- 2 # cursor column of recipe editor 7 <- 18 # cursor column of sandbox editor ] # show the cursor at the right window run [ screen:address <- print-character screen:address, 9251:literal/␣ ] screen-should-contain [ . run (F10) . .a0bc ┊d1␣f . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━. . ┊ . ] ] scenario multiple-editors-cover-only-their-own-areas [ assume-screen 60:literal/width, 10:literal/height run [ 1:address:array:character <- new [abc] 2:address:array:character <- new [def] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character ] # divider isn't messed up screen-should-contain [ . run (F10) . .abc ┊def . . ┊ . . ┊ . . ┊ . ] ] scenario editor-in-focus-keeps-cursor [ assume-screen 30:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:array:character <- new [def] # initialize programming environment and highlight cursor assume-console [] run [ 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character event-loop screen:address, console:address, 3:address:programming-environment-data screen:address <- print-character screen:address, 9251:literal/␣ ] # is cursor at the right place? screen-should-contain [ . run (F10) . .␣bc ┊def . # artifact of fake console: no events = no render # .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━. . ┊ . ] # now try typing a letter assume-console [ type [z] ] run [ 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character event-loop screen:address, console:address, 3:address:programming-environment-data screen:address <- print-character screen:address, 9251:literal/␣ ] # cursor should still be right screen-should-contain [ . run (F10) . .z␣bc ┊def . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━. . ┊ . ] ] ## Running code from the editors container sandbox-data [ data:address:array:character response:address:array:character warnings:address:array:character next-sandbox:address:sandbox-data ] scenario run-and-show-results [ $close-trace # trace too long for github assume-screen 100:literal/width, 12:literal/height # recipe editor is empty 1:address:array:character <- new [] # sandbox editor contains an instruction without storing outputs 2:address:array:character <- new [divide-with-remainder 11:literal, 3:literal] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character # run the code in the editors assume-console [ press 65526 # F10 ] run [ event-loop screen:address, console:address, 3:address:programming-environment-data ] # check that screen prints the results screen-should-contain [ . run (F10) . . ┊ . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊divide-with-remainder 11:literal, 3:literal . . ┊3 . . ┊2 . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] screen-should-contain-in-color 7:literal/white, [ . . . . . . . divide-with-remainder 11:literal, 3:literal . . . . . . . . . ] screen-should-contain-in-color, 245:literal/grey, [ . . . ┊ . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . . ┊3 . . ┊2 . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] # run another command assume-console [ left-click 1, 80 type [add 2:literal, 2:literal] press 65526 # F10 ] run [ event-loop screen:address, console:address, 3:address:programming-environment-data ] # check that screen prints the results screen-should-contain [ . run (F10) . . ┊ . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊add 2:literal, 2:literal . . ┊4 . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊divide-with-remainder 11:literal, 3:literal . . ┊3 . . ┊2 . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] ] recipe run-sandboxes [ new-default-space env:address:programming-environment-data <- next-ingredient recipes:address:editor-data <- get env:address:programming-environment-data/deref, recipes:offset current-sandbox:address:editor-data <- get env:address:programming-environment-data/deref, current-sandbox:offset # load code from recipe editor, save any warnings in:address:array:character <- editor-contents recipes:address:editor-data recipe-warnings:address:address:array:character <- get-address env:address:programming-environment-data/deref, recipe-warnings:offset recipe-warnings:address:address:array:character/deref <- reload in:address:array:character # check contents of right editor (sandbox) { sandbox-contents:address:array:character <- editor-contents current-sandbox:address:editor-data break-unless sandbox-contents:address:array:character # if contents exist, run them and turn them into a new sandbox-data new-sandbox:address:sandbox-data <- new sandbox-data:type data:address:address:array:character <- get-address new-sandbox:address:sandbox-data/deref, data:offset data:address:address:array:character/deref <- copy sandbox-contents:address:array:character # push to head of sandbox list dest:address:address:sandbox-data <- get-address env:address:programming-environment-data/deref, sandbox:offset next:address:address:sandbox-data <- get-address new-sandbox:address:sandbox-data/deref, next-sandbox:offset next:address:address:sandbox-data/deref <- copy dest:address:address:sandbox-data/deref dest:address:address:sandbox-data/deref <- copy new-sandbox:address:sandbox-data # clear sandbox editor init:address:address:duplex-list <- get-address current-sandbox:address:editor-data/deref, data:offset init:address:address:duplex-list/deref <- push-duplex 167:literal/§, 0:literal/tail } # rerun other sandboxes curr:address:sandbox-data <- get env:address:programming-environment-data/deref, sandbox:offset { break-unless curr:address:sandbox-data data:address:address:array:character <- get-address curr:address:sandbox-data/deref, data:offset response:address:address:array:character <- get-address curr:address:sandbox-data/deref, response:offset warnings:address:address:array:character <- get-address curr:address:sandbox-data/deref, warnings:offset response:address:address:array:character/deref, warnings:address:address:array:character/deref <- run-interactive data:address:address:array:character/deref curr:address:sandbox-data <- get curr:address:sandbox-data/deref, next-sandbox:offset loop } ] scenario run-updates-results [ $close-trace # trace too long for github assume-screen 100:literal/width, 12:literal/height # define a recipe (no indent for the 'add' line below so column numbers are more obvious) 1:address:array:character <- new [ recipe foo [ z:number <- add 2:literal, 2:literal ]] # sandbox editor contains an instruction without storing outputs 2:address:array:character <- new [foo] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character # run the code in the editors assume-console [ press 65526 # F10 ] run [ event-loop screen:address, console:address, 3:address:programming-environment-data ] # check that screen prints the results screen-should-contain [ . run (F10) . . ┊ . .recipe foo [ ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. .z:number <- add 2:literal, 2:literal ┊foo . .] ┊4 . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] # make a change (incrementing one of the args to 'add'), then rerun assume-console [ left-click 3, 28 # one past the value of the second arg type [«3] # replace press 65526 # F10 ] 4:event/backspace <- merge 0:literal/text, 8:literal/backspace, 0:literal/dummy, 0:literal/dummy replace-in-console 171:literal/«, 4:event/backspace run [ event-loop screen:address, console:address, 3:address:programming-environment-data ] # check that screen updates the result on the right screen-should-contain [ . run (F10) . . ┊ . .recipe foo [ ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. .z:number <- add 2:literal, 3:literal ┊foo . .] ┊5 . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] ] scenario run-instruction-and-print-warnings [ $close-trace # trace too long for github assume-screen 100:literal/width, 10:literal/height # left editor is empty 1:address:array:character <- new [] # right editor contains an illegal instruction 2:address:array:character <- new [get 1234:number, foo:offset] 3:address:programming-environment-data <- new-programming-environment screen:address, 1:address:array:character, 2:address:array:character # run the code in the editors assume-console [ press 65526 # F10 ] run [ event-loop screen:address, console:address, 3:address:programming-environment-data ] # check that screen prints error message in red screen-should-contain [ . run (F10) . . ┊ . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊get 1234:number, foo:offset . . ┊unknown element foo in container number . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] screen-should-contain-in-color 7:literal/white, [ . . . . . . . get 1234:number, foo:offset . . . . . . . ] screen-should-contain-in-color, 1:literal/red, [ . . . . . . . . . unknown element foo in container number . . . ] screen-should-contain-in-color, 245:literal/grey, [ . . . ┊ . .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . . ┊ . . ┊━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━. . ┊ . ] ] recipe editor-contents [ new-default-space editor:address:editor-data <- next-ingredient buf:address:buffer <- new-buffer 80:literal curr:address:duplex-list <- get editor:address:editor-data/deref, data:offset # skip § sentinel assert curr:address:duplex-list, [editor without data is illegal; must have at least a sentinel] curr:address:duplex-list <- next-duplex curr:address:duplex-list reply-unless curr:address:duplex-list, 0:literal { break-unless curr:address:duplex-list c:character <- get curr:address:duplex-list/deref, value:offset buffer-append buf:address:buffer, c:character curr:address:duplex-list <- next-duplex curr:address:duplex-list loop } result:address:array:character <- buffer-to-array buf:address:buffer reply result:address:array:character ] scenario editor-provides-edited-contents [ assume-screen 10:literal/width, 5:literal/height 1:address:array:character <- new [abc] 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0:literal/left, 10:literal/right assume-console [ left-click 1, 2 type [def] ] run [ editor-event-loop screen:address, console:address, 2:address:editor-data 3:address:array:character <- editor-contents 2:address:editor-data 4:array:character <- copy 3:address:array:character/deref ] memory-should-contain [ 4:string <- [abdefc] ] ] ## helpers for drawing editor borders recipe draw-box [ new-default-space screen:address <- next-ingredient top:number <- next-ingredient left:number <- next-ingredient bottom:number <- next-ingredient right:number <- next-ingredient color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } # top border draw-horizontal screen:address, top:number, left:number, right:number, color:number draw-horizontal screen:address, bottom:number, left:number, right:number, color:number draw-vertical screen:address, left:number, top:number, bottom:number, color:number draw-vertical screen:address, right:number, top:number, bottom:number, color:number draw-top-left screen:address, top:number, left:number, color:number draw-top-right screen:address, top:number, right:number, color:number draw-bottom-left screen:address, bottom:number, left:number, color:number draw-bottom-right screen:address, bottom:number, right:number, color:number # position cursor inside box move-cursor screen:address, top:number, left:number cursor-down screen:address cursor-right screen:address ] recipe draw-horizontal [ new-default-space screen:address <- next-ingredient row:number <- next-ingredient x:number <- next-ingredient right:number <- next-ingredient style:character, style-found?:boolean <- next-ingredient { break-if style-found?:boolean style:character <- copy 9472:literal/horizontal } color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } bg-color:number, bg-color-found?:boolean <- next-ingredient { break-if bg-color-found?:boolean bg-color:number <- copy 0:literal/black } move-cursor screen:address, row:number, x:number { continue?:boolean <- lesser-or-equal x:number, right:number # right is inclusive, to match editor-data semantics break-unless continue?:boolean print-character screen:address, style:character, color:number, bg-color:number x:number <- add x:number, 1:literal loop } ] recipe draw-vertical [ new-default-space screen:address <- next-ingredient col:number <- next-ingredient x:number <- next-ingredient bottom:number <- next-ingredient style:character, style-found?:boolean <- next-ingredient { break-if style-found?:boolean style:character <- copy 9474:literal/vertical } color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } { continue?:boolean <- lesser-than x:number, bottom:number break-unless continue?:boolean move-cursor screen:address, x:number, col:number print-character screen:address, style:character, color:number x:number <- add x:number, 1:literal loop } ] recipe draw-top-left [ new-default-space screen:address <- next-ingredient top:number <- next-ingredient left:number <- next-ingredient color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } move-cursor screen:address, top:number, left:number print-character screen:address, 9484:literal/down-right, color:number ] recipe draw-top-right [ new-default-space screen:address <- next-ingredient top:number <- next-ingredient right:number <- next-ingredient color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } move-cursor screen:address, top:number, right:number print-character screen:address, 9488:literal/down-left, color:number ] recipe draw-bottom-left [ new-default-space screen:address <- next-ingredient bottom:number <- next-ingredient left:number <- next-ingredient color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } move-cursor screen:address, bottom:number, left:number print-character screen:address, 9492:literal/up-right, color:number ] recipe draw-bottom-right [ new-default-space screen:address <- next-ingredient bottom:number <- next-ingredient right:number <- next-ingredient color:number, color-found?:boolean <- next-ingredient { # default color to white break-if color-found?:boolean color:number <- copy 245:literal/grey } move-cursor screen:address, bottom:number, right:number print-character screen:address, 9496:literal/up-left, color:number ] recipe print-string-with-gradient-background [ new-default-space x:address:screen <- next-ingredient s:address:array:character <- next-ingredient color:number <- next-ingredient bg-color1:number <- next-ingredient bg-color2:number <- next-ingredient len:number <- length s:address:array:character/deref color-range:number <- subtract bg-color2:number, bg-color1:number color-quantum:number <- divide color-range:number, len:number #? close-console #? 2 #? $print len:number, [, ], color-range:number, [, ], color-quantum:number, [ #? ] #? 2 #? #? $exit #? 3 bg-color:number <- copy bg-color1:number i:number <- copy 0:literal { done?:boolean <- greater-or-equal i:number, len:number break-if done?:boolean c:character <- index s:address:array:character/deref, i:number print-character x:address:screen, c:character, color:number, bg-color:number i:number <- add i:number, 1:literal bg-color:number <- add bg-color:number, color-quantum:number #? $print [=> ], bg-color:number, [ #? ] #? 1 loop } #? $exit #? 1 reply x:address:screen/same-as-ingredient:0 ]