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Diffstat (limited to 'archive/1.vm/sandbox/004-programming-environment.mu')
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1 files changed, 268 insertions, 0 deletions
diff --git a/archive/1.vm/sandbox/004-programming-environment.mu b/archive/1.vm/sandbox/004-programming-environment.mu new file mode 100644 index 00000000..1454144b --- /dev/null +++ b/archive/1.vm/sandbox/004-programming-environment.mu @@ -0,0 +1,268 @@ +## putting the environment together out of editors + +def! main [ + local-scope + open-console + clear-screen null/screen # non-scrolling app + env:&:environment <- new-programming-environment null/filesystem, null/screen + render-all null/screen, env, render + event-loop null/screen, null/console, env, null/filesystem +] + +container environment [ + current-sandbox:&:editor +] + +def new-programming-environment resources:&:resources, screen:&:screen, test-sandbox-editor-contents:text -> result:&:environment [ + local-scope + load-inputs + width:num <- screen-width screen + result <- new environment:type + # sandbox editor + current-sandbox:&:editor <- new-editor test-sandbox-editor-contents, 0/left, width/right + *result <- put *result, current-sandbox:offset, current-sandbox + <programming-environment-initialization> +] + +def event-loop screen:&:screen, console:&:console, env:&:environment, resources:&:resources -> screen:&:screen, console:&:console, env:&:environment, resources:&:resources [ + local-scope + load-inputs + current-sandbox:&:editor <- get *env, current-sandbox:offset + # if we fall behind we'll stop updating the screen, but then we have to + # render the entire screen when we catch up. + # todo: test this + render-all-on-no-more-events?:bool <- copy false + { + # looping over each (keyboard or touch) event as it occurs + +next-event + e:event, found?:bool, quit?:bool, console <- read-event console + loop-unless found? + break-if quit? # only in tests + trace 10, [app], [next-event] + <handle-event> + # check for global events that will trigger regardless of which editor has focus + { + k:num, is-keycode?:bool <- maybe-convert e:event, keycode:variant + break-unless is-keycode? + <global-keypress> + } + { + c:char, is-unicode?:bool <- maybe-convert e:event, text:variant + break-unless is-unicode? + <global-type> + } + # 'touch' event + { + t:touch-event, is-touch?:bool <- maybe-convert e:event, touch:variant + break-unless is-touch? + # ignore all but 'left-click' events for now + # todo: test this + touch-type:num <- get t, type:offset + is-left-click?:bool <- equal touch-type, 65513/mouse-left + loop-unless is-left-click?, +next-event + click-row:num <- get t, row:offset + click-column:num <- get t, column:offset + # later exceptions for non-editor touches will go here + <global-touch> + move-cursor current-sandbox, screen, t + screen <- update-cursor screen, current-sandbox, env + loop +next-event + } + # 'resize' event - redraw editor + # todo: test this after supporting resize in assume-console + { + r:resize-event, is-resize?:bool <- maybe-convert e:event, resize:variant + break-unless is-resize? + env, screen <- resize screen, env + screen <- render-all screen, env, render-without-moving-cursor + loop +next-event + } + # not global and not a touch event + { + render?:bool <- handle-keyboard-event screen, current-sandbox, e:event + # try to batch up rendering if there are more events queued up + render-all-on-no-more-events? <- or render-all-on-no-more-events?, render? + more-events?:bool <- has-more-events? console + { + break-if more-events? + break-unless render-all-on-no-more-events? + render-all-on-no-more-events? <- copy false + screen <- render-all screen, env, render + } + screen <- update-cursor screen, current-sandbox, env + } + loop + } +] + +def resize screen:&:screen, env:&:environment -> env:&:environment, screen:&:screen [ + local-scope + load-inputs + clear-screen screen # update screen dimensions + width:num <- screen-width screen + # update sandbox editor + current-sandbox:&:editor <- get *env, current-sandbox:offset + right:num <- subtract width, 1 + *current-sandbox <- put *current-sandbox right:offset, right + # reset cursor + *current-sandbox <- put *current-sandbox, cursor-row:offset, 1 + *current-sandbox <- put *current-sandbox, cursor-column:offset, 0 +] + +# Variant of 'render' that updates cursor-row and cursor-column based on +# before-cursor (rather than the other way around). If before-cursor moves +# off-screen, it resets cursor-row and cursor-column. +def render-without-moving-cursor screen:&:screen, editor:&:editor -> last-row:num, last-column:num, screen:&:screen, editor:&:editor [ + local-scope + load-inputs + return-unless editor, 1/top, 0/left + left:num <- get *editor, left:offset + screen-height:num <- screen-height screen + right:num <- get *editor, right:offset + curr:&:duplex-list:char <- get *editor, top-of-screen:offset + prev:&:duplex-list:char <- copy curr # just in case curr becomes null and we can't compute prev + curr <- next curr + color:num <- copy 7/white + row:num <- copy 1/top + column:num <- copy left + # save before-cursor + old-before-cursor:&:duplex-list:char <- get *editor, before-cursor:offset + # initialze cursor-row/cursor-column/before-cursor to the top of the screen + # by default + *editor <- put *editor, cursor-row:offset, row + *editor <- put *editor, cursor-column:offset, column + top-of-screen:&:duplex-list:char <- get *editor, top-of-screen:offset + *editor <- put *editor, before-cursor:offset, top-of-screen + screen <- move-cursor screen, row, column + { + +next-character + break-unless curr + off-screen?:bool <- greater-or-equal row, screen-height + break-if off-screen? + # if we find old-before-cursor still on the new resized screen, update + # editor.cursor-row and editor.cursor-column based on + # old-before-cursor + { + at-cursor?:bool <- equal old-before-cursor, prev + break-unless at-cursor? + *editor <- put *editor, cursor-row:offset, row + *editor <- put *editor, cursor-column:offset, column + *editor <- put *editor, before-cursor:offset, old-before-cursor + } + c:char <- get *curr, value:offset + <character-c-received> + { + # newline? move to left rather than 0 + newline?:bool <- equal c, 10/newline + break-unless newline? + # clear rest of line in this window + clear-line-until screen, right + # skip to next line + row <- add row, 1 + column <- copy left + screen <- move-cursor screen, row, column + curr <- next curr + prev <- next prev + loop +next-character + } + { + # at right? wrap. even if there's only one more letter left; we need + # room for clicking on the cursor after it. + at-right?:bool <- equal column, right + break-unless at-right? + # print wrap icon + wrap-icon:char <- copy 8617/loop-back-to-left + print screen, wrap-icon, 245/grey + column <- copy left + row <- add row, 1 + screen <- move-cursor screen, row, column + # don't increment curr + loop +next-character + } + print screen, c, color + curr <- next curr + prev <- next prev + column <- add column, 1 + loop + } + # save first character off-screen + *editor <- put *editor, bottom-of-screen:offset, curr + *editor <- put *editor, bottom:offset, row + return row, column +] + +type render-recipe = (recipe (address screen) (address editor) -> number number (address screen) (address editor)) + +def render-all screen:&:screen, env:&:environment, render-editor:render-recipe -> screen:&:screen, env:&:environment [ + local-scope + load-inputs + trace 10, [app], [render all] + # top menu + trace 11, [app], [render top menu] + width:num <- screen-width screen + draw-horizontal screen, 0, 0/left, width, 32/space, 0/black, 238/grey + button-start:num <- subtract width, 20 + button-on-screen?:bool <- greater-or-equal button-start, 0 + assert button-on-screen?, [screen too narrow for menu] + screen <- move-cursor screen, 0/row, button-start + print screen, [ run (F4) ], 255/white, 161/reddish + # + screen <- render-sandbox-side screen, env, render-editor + <end-render-components> # no early returns permitted + # + current-sandbox:&:editor <- get *env, current-sandbox:offset + screen <- update-cursor screen, current-sandbox, env +] + +# replaced in a later layer +def render-sandbox-side screen:&:screen, env:&:environment, render-editor:render-recipe -> screen:&:screen, env:&:environment [ + local-scope + load-inputs + trace 11, [app], [render sandboxes] + old-top-idx:num <- save-top-idx screen + current-sandbox:&:editor <- get *env, current-sandbox:offset + left:num <- get *current-sandbox, left:offset + right:num <- get *current-sandbox, right:offset + row:num, column:num, screen, current-sandbox <- call render-editor, screen, current-sandbox + # draw solid line after code (you'll see why in later layers) + draw-horizontal screen, row, left, right + row <- add row, 1 + clear-screen-from screen, row, left, left, right + # + assert-no-scroll screen, old-top-idx +] + +def update-cursor screen:&:screen, current-sandbox:&:editor, env:&:environment -> screen:&:screen [ + local-scope + load-inputs + <update-cursor-special-cases> + cursor-row:num <- get *current-sandbox, cursor-row:offset + cursor-column:num <- get *current-sandbox, cursor-column:offset + screen <- move-cursor screen, cursor-row, cursor-column +] + +scenario backspace-over-text [ + local-scope + trace-until 100/app # trace too long + assume-screen 50/width, 15/height + # recipes.mu is empty + assume-resources [ + ] + # sandbox editor contains an instruction without storing outputs + env:&:environment <- new-programming-environment resources, screen, [] + render-all screen, env, render + # run the code in the editors + assume-console [ + type [a] + press backspace + ] + run [ + event-loop screen, console, env, resources + 10:num/raw <- get *screen, cursor-row:offset + 11:num/raw <- get *screen, cursor-column:offset + ] + memory-should-contain [ + 10 <- 1 + 11 <- 0 + ] +] |