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author | Kartik K. Agaram <vc@akkartik.com> | 2017-06-23 19:47:09 -0700 |
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committer | Kartik K. Agaram <vc@akkartik.com> | 2017-06-23 19:47:09 -0700 |
commit | b2eff9f97e02fe6f5f55133002c16116aac13ed4 (patch) | |
tree | 028a0b60dd4f7d7ff0cabad5beb8331ed27a0260 | |
parent | b1e558cfe42029df630e1c2d9399d4b52c187801 (diff) | |
download | mu-b2eff9f97e02fe6f5f55133002c16116aac13ed4.tar.gz |
3942
No, my conclusion in the previous commit was wrong. When you print a character on the right margin, the cursor coordinates always wrap around to the left margin on the next row. It's just that if you're at the bottom of the screen, scrolling gives the impression that the row didn't change.
-rw-r--r-- | 081print.mu | 108 | ||||
-rw-r--r-- | edit/001-editor.mu | 4 | ||||
-rw-r--r-- | edit/002-typing.mu | 18 | ||||
-rw-r--r-- | edit/004-programming-environment.mu | 4 | ||||
-rw-r--r-- | edit/005-sandbox.mu | 10 |
5 files changed, 106 insertions, 38 deletions
diff --git a/081print.mu b/081print.mu index ff6cf5c0..465d228a 100644 --- a/081print.mu +++ b/081print.mu @@ -1,5 +1,16 @@ # Wrappers around print primitives that take a 'screen' object and are thus # easier to test. +# +# Screen objects are intended to exactly mimic the behavior of traditional +# terminals. Moving a cursor too far write wraps it to the next line, +# scrolling if necessary. The details are subtle: +# +# a) Rows can take unbounded values, and such values are preserved rather than +# clamped or wrapped around. +# +# b) If you print to a square (row, right) on the right margin, the cursor +# position depends on whether 'row' is in range. If it is, the new cursor +# position is (row+1, 0). If it isn't, the new cursor position is (row, 0). container screen [ num-rows:num @@ -7,6 +18,7 @@ container screen [ cursor-row:num cursor-column:num data:&:@:screen-cell # capacity num-rows*num-columns + pending-scroll?:bool top-idx:num # index inside data that corresponds to top-left of screen # modified on scroll, wrapping around to the top of data ] @@ -16,6 +28,32 @@ container screen-cell [ color:num ] +def main [ + local-scope + open-console + clear-screen + print 0/screen [a] +#? a:char <- copy 97 +#? i:num <- copy 0 +#? { +#? done?:bool <- greater-or-equal i, 6 +#? break-if done? +#? move-cursor 0/screen i, 2527 +#? print 0/screen a +#? a <- add a, 1 +#? i <- add i, 1 +#? loop +#? } + move-cursor 0/screen 5, 2527 + a:num b:num <- cursor-position 0/screen + print 0/screen [f] + c:num d:num <- cursor-position 0/screen + wait-for-some-interaction + close-console + $print a [ ] b 10/newline + $print c [ ] d 10/newline +] + def new-fake-screen w:num, h:num -> result:&:screen [ local-scope load-ingredients @@ -26,14 +64,14 @@ def new-fake-screen w:num, h:num -> result:&:screen [ assert non-zero-height?, [screen can't have zero height] bufsize:num <- multiply w, h data:&:@:screen-cell <- new screen-cell:type, bufsize - *result <- merge h/num-rows, w/num-columns, 0/cursor-row, 0/cursor-column, data, 0/top-idx + *result <- merge h/num-rows, w/num-columns, 0/cursor-row, 0/cursor-column, data, 0/pending-scroll?, 0/top-idx result <- clear-screen result ] def clear-screen screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [clear-screen] +#? stash [clear-screen] { break-if screen # real screen @@ -61,7 +99,7 @@ def clear-screen screen:&:screen -> screen:&:screen [ def fake-screen-is-empty? screen:&:screen -> result:bool [ local-scope load-ingredients - stash [fake-screen-is-empty?] +#? stash [fake-screen-is-empty?] return-unless screen, 1/true # do nothing for real screens buf:&:@:screen-cell <- get *screen, data:offset i:num <- copy 0 @@ -150,9 +188,13 @@ def print screen:&:screen, c:char -> screen:&:screen [ { at-bottom?:bool <- equal row, height break-unless at-bottom? + $dump-screen + $print [scroll1] 10/newline scroll-fake-screen screen row <- subtract height, 1 *screen <- put *screen, cursor-row:offset, row + *screen <- put *screen, pending-scroll?:offset, 0/false + $dump-screen } # if row is below bottom margin (error), reset to bottom margin { @@ -162,6 +204,17 @@ def print screen:&:screen, c:char -> screen:&:screen [ *screen <- put *screen, cursor-row:offset, row } # } + # if there's a pending scroll, perform it + { + pending-scroll?:bool <- get *screen, pending-scroll?:offset +#? $print pending-scroll? 10/newline + break-unless pending-scroll? + $print [scroll2] 10/newline + $dump-screen + scroll-fake-screen screen + *screen <- put *screen, pending-scroll?:offset, 0/false + $dump-screen + } #? stash [print] row column #? $print [print-character (], row, [, ], column, [): ], c, 10/newline # special-case: newline @@ -195,16 +248,30 @@ def print screen:&:screen, c:char -> screen:&:screen [ index:num <- data-index row, column, width, height, top-idx cursor:screen-cell <- merge c, color *buf <- put-index *buf, index, cursor - # move cursor to next character + # move cursor to next character, wrapping as necessary + # however, don't scroll just yet # (but don't bother making it valid; we'll do that before the next print) column <- add column, 1 + { + past-right?:bool <- greater-or-equal column, width + break-unless past-right? + column <- copy 0 + row <- add row, 1 + past-bottom?:bool <- greater-or-equal row, height + break-unless past-bottom? + # queue up a scroll + $print [pending scroll] 10/newline + *screen <- put *screen, pending-scroll?:offset, 1/true + row <- subtract row, 1 # update cursor as if scroll already happened + } + *screen <- put *screen, cursor-row:offset, row *screen <- put *screen, cursor-column:offset, column ] def cursor-down-on-fake-screen screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-down] +#? stash [cursor-down] row:num <- get *screen, cursor-row:offset height:num <- get *screen, num-rows:offset bottom:num <- subtract height, 1 @@ -223,7 +290,7 @@ def cursor-down-on-fake-screen screen:&:screen -> screen:&:screen [ def scroll-fake-screen screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [scroll-fake-screen] +#? stash [scroll-fake-screen] width:num <- get *screen, num-columns:offset height:num <- get *screen, num-rows:offset buf:&:@:screen-cell <- get *screen, data:offset @@ -515,7 +582,7 @@ def assert-no-scroll screen:&:screen, old-top-idx:num [ def clear-line screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [clear-line] +#? stash [clear-line] space:char <- copy 0/nul { break-if screen @@ -545,7 +612,7 @@ def clear-line-until screen:&:screen, right:num/inclusive -> screen:&:screen [ local-scope load-ingredients row:num, column:num <- cursor-position screen - stash [clear-line-until] row column +#? stash [clear-line-until] row column height:num <- screen-height screen past-bottom?:bool <- greater-or-equal row, height return-if past-bottom? @@ -582,7 +649,7 @@ def cursor-position screen:&:screen -> row:num, column:num [ def move-cursor screen:&:screen, new-row:num, new-column:num -> screen:&:screen [ local-scope load-ingredients - stash [move-cursor] +#? stash [move-cursor] { break-if screen # real screen @@ -592,6 +659,8 @@ def move-cursor screen:&:screen, new-row:num, new-column:num -> screen:&:screen # fake screen *screen <- put *screen, cursor-row:offset, new-row *screen <- put *screen, cursor-column:offset, new-column + $print [move cursor ] new-row [ ] new-column 10/newline + *screen <- put *screen, pending-scroll?:offset, 0/false ] scenario clear-line-erases-printed-characters [ @@ -628,7 +697,7 @@ scenario clear-line-erases-printed-characters [ def cursor-down screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-down] +#? stash [cursor-down] { break-if screen # real screen @@ -671,7 +740,7 @@ scenario cursor-down-scrolls [ def cursor-up screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-up] +#? stash [cursor-up] { break-if screen # real screen @@ -689,7 +758,7 @@ def cursor-up screen:&:screen -> screen:&:screen [ def cursor-right screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-right] +#? stash [cursor-right] { break-if screen # real screen @@ -709,7 +778,7 @@ def cursor-right screen:&:screen -> screen:&:screen [ def cursor-left screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-left] +#? stash [cursor-left] { break-if screen # real screen @@ -727,16 +796,15 @@ def cursor-left screen:&:screen -> screen:&:screen [ def cursor-to-start-of-line screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-to-start-of-line] +#? stash [cursor-to-start-of-line] row:num <- cursor-position screen - column:num <- copy 0 - screen <- move-cursor screen, row, column + screen <- move-cursor screen, row, 0/column ] def cursor-to-next-line screen:&:screen -> screen:&:screen [ local-scope load-ingredients - stash [cursor-to-next-line] +#? stash [cursor-to-next-line] screen <- cursor-down screen screen <- cursor-to-start-of-line screen ] @@ -745,14 +813,14 @@ def move-cursor-to-column screen:&:screen, column:num -> screen:&:screen [ local-scope load-ingredients row:num, _ <- cursor-position screen - stash [move-cursor-to-column] row +#? stash [move-cursor-to-column] row move-cursor screen, row, column ] def screen-width screen:&:screen -> width:num [ local-scope load-ingredients - stash [screen-width] +#? stash [screen-width] { break-unless screen # fake screen @@ -766,7 +834,7 @@ def screen-width screen:&:screen -> width:num [ def screen-height screen:&:screen -> height:num [ local-scope load-ingredients - stash [screen-height] +#? stash [screen-height] { break-unless screen # fake screen diff --git a/edit/001-editor.mu b/edit/001-editor.mu index f7b7fb89..d4e0a479 100644 --- a/edit/001-editor.mu +++ b/edit/001-editor.mu @@ -207,7 +207,7 @@ def render screen:&:screen, editor:&:editor -> last-row:num, last-column:num, sc def clear-screen-from screen:&:screen, row:num, column:num, left:num, right:num -> screen:&:screen [ local-scope load-ingredients - stash [clear-screen-from] row column [between] left [and] right +#? stash [clear-screen-from] row column [between] left [and] right # if it's the real screen, use the optimized primitive { break-if screen @@ -218,7 +218,7 @@ def clear-screen-from screen:&:screen, row:num, column:num, left:num, right:num screen <- move-cursor screen, row, column clear-line-until screen, right clear-rest-of-screen screen, row, left, right - screen <- move-cursor screen, row, column +#? screen <- move-cursor screen, row, column ] def clear-rest-of-screen screen:&:screen, row:num, left:num, right:num -> screen:&:screen [ diff --git a/edit/002-typing.mu b/edit/002-typing.mu index 05ace7c5..acb0a53c 100644 --- a/edit/002-typing.mu +++ b/edit/002-typing.mu @@ -1116,11 +1116,11 @@ after <handle-special-key> [ def draw-horizontal screen:&:screen, row:num, x:num, right:num -> screen:&:screen [ local-scope load-ingredients - a:num, b:num <- cursor-position screen - stash [draw-horizontal] row [--] a b +#? a:num, b:num <- cursor-position screen +#? stash [draw-horizontal] row [--] a b height:num <- screen-height screen past-bottom?:bool <- greater-or-equal row, height - stash [ past-bottom?] past-bottom? +#? stash [ past-bottom?] past-bottom? return-if past-bottom? style:char, style-found?:bool <- next-ingredient { @@ -1138,18 +1138,18 @@ def draw-horizontal screen:&:screen, row:num, x:num, right:num -> screen:&:scree break-if bg-color-found? bg-color <- copy 0/black } - stash [aa] x +#? stash [aa] x screen <- move-cursor screen, row, x { continue?:bool <- lesser-or-equal x, right # right is inclusive, to match editor semantics break-unless continue? - a b <- cursor-position screen - stash [bb] x [--] a b +#? a b <- cursor-position screen +#? stash [bb] x [--] a b print screen, style, color, bg-color - a b <- cursor-position screen - stash [cc] x [--] a b +#? a b <- cursor-position screen +#? stash [cc] x [--] a b x <- add x, 1 loop } - stash [draw-horizontal done] +#? stash [draw-horizontal done] ] diff --git a/edit/004-programming-environment.mu b/edit/004-programming-environment.mu index bcd3b524..021d9d73 100644 --- a/edit/004-programming-environment.mu +++ b/edit/004-programming-environment.mu @@ -447,7 +447,7 @@ def render-recipes screen:&:screen, env:&:environment, render-editor:render-reci clear-screen-from screen, row, left, left, right # assert-no-scroll screen, old-top-idx - stash [render recipes done] +#? stash [render recipes done] ] # replaced in a later layer @@ -468,7 +468,7 @@ def render-sandbox-side screen:&:screen, env:&:environment, render-editor:render clear-screen-from screen, row, left, left, right # assert-no-scroll screen, old-top-idx - stash [render sandbox side0 done] +#? stash [render sandbox side0 done] ] def update-cursor screen:&:screen, recipes:&:editor, current-sandbox:&:editor, sandbox-in-focus?:bool, env:&:environment -> screen:&:screen [ diff --git a/edit/005-sandbox.mu b/edit/005-sandbox.mu index 2b17ecc2..f27c1a2c 100644 --- a/edit/005-sandbox.mu +++ b/edit/005-sandbox.mu @@ -270,15 +270,15 @@ def! render-sandbox-side screen:&:screen, env:&:environment, render-editor:rende clear-rest-of-screen screen, row, left, right # assert-no-scroll screen, old-top-idx - stash [render sandbox side done] +#? stash [render sandbox side done] ] def render-sandboxes screen:&:screen, sandbox:&:sandbox, left:num, right:num, row:num, render-from:num, idx:num -> row:num, screen:&:screen, sandbox:&:sandbox [ local-scope load-ingredients return-unless sandbox - a:num b:num <- cursor-position screen - stash [render-sandboxes] idx [:] row [--] a b +#? a:num b:num <- cursor-position screen +#? stash [render-sandboxes] idx [:] row [--] a b screen-height:num <- screen-height screen at-bottom?:bool <- greater-or-equal row, screen-height return-if at-bottom? @@ -361,11 +361,11 @@ scenario skip-rendering-sandbox-menu-past-bottom-row [ # create two sandboxes such that the top one just barely fills the screen env:&:environment <- new-programming-environment resources, screen, [] env <- restore-sandboxes env, resources - $clear-trace +#? $clear-trace run [ render-all screen, env, render ] - $dump-trace [app] +#? $dump-trace [app] screen-should-contain [ . run (F4) . . ┊ . |