diff options
-rw-r--r-- | edit.mu | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/edit.mu b/edit.mu index b0e861ac..569e8eba 100644 --- a/edit.mu +++ b/edit.mu @@ -2850,22 +2850,30 @@ d] ] after +scroll-down [ -#? $print [scroll down], 10/newline #? 1 +#? $print [scroll down], 10/newline #? 2 top-of-screen:address:address:duplex-list <- get-address *editor, top-of-screen:offset left:number <- get *editor, left:offset right:number <- get *editor, right:offset max:number <- subtract right, left - *top-of-screen <- start-of-next-line *top-of-screen, max + *top-of-screen <- before-start-of-next-line *top-of-screen, max ] # takes a pointer into the doubly-linked list, scans ahead at most 'max' -# positions until just past the next newline -recipe start-of-next-line [ +# positions until the next newline +recipe before-start-of-next-line [ local-scope original:address:duplex-list <- next-ingredient max:number <- next-ingredient count:number <- copy 0 curr:address:duplex-list <- copy original + # skip the initial newline if it exists + { + c:character <- get *curr, value:offset + at-newline?:boolean <- equal c, 10/newline + break-unless at-newline? + curr <- next-duplex curr + count <- add count, 1 + } { reply-unless curr, original done?:boolean <- greater-or-equal count, max @@ -3078,6 +3086,36 @@ d] ] ] +scenario editor-combines-page-and-line-scroll [ + # screen has 1 line for menu + 3 lines + assume-screen 10/width, 4/height + # initialize editor with a few pages of lines + 1:address:array:character <- new [a +b +c +d +e +f +g] + 2:address:editor-data <- new-editor 1:address:array:character, screen:address, 0/left, 5/right + # scroll down one page and one line + assume-console [ + press 65518 # page-down + left-click 3, 0 + press 65516 # down-arrow + ] + run [ + editor-event-loop screen:address, console:address, 2:address:editor-data + ] + # screen scrolls down 3 lines + screen-should-contain [ + . . + .d . + .e . + .f . + ] +] + # cursor-up can scroll if necessary scenario editor-can-scroll-up-using-arrow-keys [ |