528 lines
26 KiB
Forth
528 lines
26 KiB
Forth
# The top-level data structure for the Mu shell.
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#
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# vim:textwidth&
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# It would be nice for tests to use a narrower screen than the standard 0x80 of
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# 1024 pixels with 8px-wide graphemes. But it complicates rendering logic to
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# make width configurable, so we just use longer lines than usual.
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type environment {
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globals: global-table
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sandbox: sandbox
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partial-function-name: (handle gap-buffer)
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cursor-in-globals?: boolean
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cursor-in-function-modal?: boolean
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}
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# Here's a sample usage session and what it will look like on the screen.
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fn test-environment {
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var env-storage: environment
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var env/esi: (addr environment) <- address env-storage
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initialize-environment env
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# setup: screen
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var screen-on-stack: screen
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var screen/edi: (addr screen) <- address screen-on-stack
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initialize-screen screen, 0x80/width=72, 0x10/height, 0/no-pixel-graphics
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#
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type-into-repl env, screen, "(+ 3 4)" # we don't have any global definitions here, so no macros
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# | global function definitions | sandbox
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# top row blank for now
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check-screen-row screen, 0/y, " ", "F - test-environment/0"
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check-screen-row screen, 1/y, " screen: ", "F - test-environment/1"
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# starting at the same screen row, render the fake screen that exists within the sandbox within env
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check-background-color-in-screen-row screen, 0/bg, 1/y, " ........ ", "F - test-environment/1-2"
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check-background-color-in-screen-row screen, 0/bg, 2/y, " ........ ", "F - test-environment/2"
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check-background-color-in-screen-row screen, 0/bg, 3/y, " ........ ", "F - test-environment/3"
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check-screen-row screen, 4/y, " ", "F - test-environment/4"
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check-screen-row screen, 5/y, " keyboard: ", "F - test-environment/5"
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check-background-color-in-screen-row screen, 0/bg, 5/y, " ................ ", "F - test-environment/5-2"
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check-screen-row screen, 6/y, " ", "F - test-environment/6"
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check-screen-row screen, 7/y, " (+ 3 4) ", "F - test-environment/7"
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check-screen-row screen, 8/y, " ... trace depth: 4 ", "F - test-environment/8"
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check-screen-row screen, 9/y, " => 7 ", "F - test-environment/9"
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check-screen-row screen, 0xa/y, " ", "F - test-environment/0xa"
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check-screen-row screen, 0xb/y, " ", "F - test-environment/0xb"
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check-screen-row screen, 0xc/y, " ", "F - test-environment/0xc"
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check-screen-row screen, 0xd/y, " ", "F - test-environment/0xd"
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check-screen-row screen, 0xe/y, " ", "F - test-environment/0xe"
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# bottom row is for a wordstar-style menu
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check-screen-row screen, 0xf/y, " ^r run main ^s run sandbox ^g go to ^m to trace ^a << ^b <word ^f word> ^e >> ", "F - test-environment/0xf"
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}
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fn test-definition-in-environment {
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var env-storage: environment
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var env/esi: (addr environment) <- address env-storage
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initialize-environment env
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# setup: screen
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var screen-on-stack: screen
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var screen/edi: (addr screen) <- address screen-on-stack
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initialize-screen screen, 0x80/width=72, 0x10/height, 0/no-pixel-graphics
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# define a function on the right (sandbox) side
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type-into-repl env, screen, "(define fn1 (fn() 42))" # we don't have any global definitions here, so no macros
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# | global function definitions | sandbox
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check-screen-row screen, 0/y, " ", "F - test-definition-in-environment/0"
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# function definition is now on the left side
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check-screen-row screen, 1/y, " (define fn1 (fn() 42)) screen: ", "F - test-definition-in-environment/1"
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check-background-color-in-screen-row screen, 0/bg, 1/y, " ........ ", "F - test-definition-in-environment/1-2"
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check-background-color-in-screen-row screen, 0/bg, 2/y, " ........ ", "F - test-definition-in-environment/2"
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check-background-color-in-screen-row screen, 0/bg, 3/y, " ........ ", "F - test-definition-in-environment/3"
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check-screen-row screen, 4/y, " ", "F - test-definition-in-environment/4"
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check-screen-row screen, 5/y, " keyboard: ", "F - test-definition-in-environment/5"
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check-background-color-in-screen-row screen, 0/bg, 5/y, " ................ ", "F - test-definition-in-environment/5-2"
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check-screen-row screen, 6/y, " ", "F - test-definition-in-environment/6"
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check-screen-row screen, 7/y, " ", "F - test-definition-in-environment/7"
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# you can still see the trace on the right for what you just added to the left
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check-screen-row screen, 8/y, " ... trace depth: 4 ", "F - test-definition-in-environment/8"
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}
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# helper for testing
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fn type-into-repl self: (addr environment), screen: (addr screen), keys: (addr array byte) {
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# clear the buffer
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edit-environment self, 0x15/ctrl-u, 0/no-disk
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render-environment screen, self
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# type in all the keys
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var input-stream-storage: (stream byte 0x40/capacity)
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var input-stream/ecx: (addr stream byte) <- address input-stream-storage
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write input-stream, keys
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{
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var done?/eax: boolean <- stream-empty? input-stream
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compare done?, 0/false
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break-if-!=
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var key/eax: grapheme <- read-grapheme input-stream
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edit-environment self, key, 0/no-disk
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render-environment screen, self
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loop
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}
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# submit
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edit-environment self, 0x13/ctrl-s, 0/no-disk
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render-environment screen, self
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}
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## interface
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fn initialize-environment _self: (addr environment) {
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var self/esi: (addr environment) <- copy _self
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var globals/eax: (addr global-table) <- get self, globals
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initialize-globals globals
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var sandbox/eax: (addr sandbox) <- get self, sandbox
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initialize-sandbox sandbox, 1/with-screen
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var partial-function-name-ah/eax: (addr handle gap-buffer) <- get self, partial-function-name
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allocate partial-function-name-ah
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var partial-function-name/eax: (addr gap-buffer) <- lookup *partial-function-name-ah
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initialize-gap-buffer partial-function-name, 0x40/function-name-capacity
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}
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fn render-environment screen: (addr screen), _self: (addr environment) {
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# globals layout: 1 char padding, 41 code, 1 padding, 41 code, 1 padding = 85
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# sandbox layout: 1 padding, 41 code, 1 padding = 43
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# total = 128 chars
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var self/esi: (addr environment) <- copy _self
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var cursor-in-globals-a/eax: (addr boolean) <- get self, cursor-in-globals?
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var cursor-in-globals?/eax: boolean <- copy *cursor-in-globals-a
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var globals/ecx: (addr global-table) <- get self, globals
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render-globals screen, globals, cursor-in-globals?
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var sandbox/edx: (addr sandbox) <- get self, sandbox
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var cursor-in-sandbox?/ebx: boolean <- copy 1/true
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cursor-in-sandbox? <- subtract cursor-in-globals?
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render-sandbox screen, sandbox, 0x55/sandbox-left-margin, 0/sandbox-top-margin, 0x80/screen-width, 0x2f/screen-height-without-menu, cursor-in-sandbox?
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# modal if necessary
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{
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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compare *cursor-in-function-modal-a, 0/false
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break-if-=
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render-function-modal screen, self
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render-function-modal-menu screen, self
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return
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}
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# render menu
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{
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var cursor-in-globals?/eax: (addr boolean) <- get self, cursor-in-globals?
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compare *cursor-in-globals?, 0/false
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break-if-=
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render-globals-menu screen, globals
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return
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}
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render-sandbox-menu screen, sandbox
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}
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fn edit-environment _self: (addr environment), key: grapheme, data-disk: (addr disk) {
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var self/esi: (addr environment) <- copy _self
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var globals/edi: (addr global-table) <- get self, globals
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var sandbox/ecx: (addr sandbox) <- get self, sandbox
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# ctrl-r
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# Assumption: 'real-screen' and 'real-keyboard' are 0
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{
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compare key, 0x12/ctrl-r
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break-if-!=
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var tmp/eax: (addr handle cell) <- copy 0
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var nil: (handle cell)
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tmp <- address nil
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allocate-pair tmp
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# (main real-screen real-keyboard)
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var real-keyboard: (handle cell)
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tmp <- address real-keyboard
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allocate-keyboard tmp
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# args = cons(real-keyboard, nil)
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var args: (handle cell)
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tmp <- address args
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new-pair tmp, real-keyboard, nil
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#
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var real-screen: (handle cell)
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tmp <- address real-screen
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allocate-screen tmp
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# args = cons(real-screen, args)
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tmp <- address args
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new-pair tmp, real-screen, *tmp
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#
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var main: (handle cell)
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tmp <- address main
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new-symbol tmp, "main"
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# args = cons(main, args)
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tmp <- address args
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new-pair tmp, main, *tmp
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# clear real screen
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clear-screen 0/screen
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set-cursor-position 0/screen, 0, 0
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# run
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var out: (handle cell)
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var out-ah/ecx: (addr handle cell) <- address out
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var trace-storage: trace
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var trace/ebx: (addr trace) <- address trace-storage
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initialize-trace trace, 1/only-errors, 0x10/capacity, 0/visible
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evaluate tmp, out-ah, nil, globals, trace, 0/no-fake-screen, 0/no-fake-keyboard, 0/call-number
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# wait for a keypress
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{
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var tmp/eax: byte <- read-key 0/keyboard
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compare tmp, 0
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loop-if-=
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}
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#
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return
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}
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# ctrl-s: send multiple places
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{
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compare key, 0x13/ctrl-s
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break-if-!=
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{
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# cursor in function modal? do nothing
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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compare *cursor-in-function-modal-a, 0/false
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break-if-!=
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{
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# cursor in globals? update current definition
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var cursor-in-globals-a/edx: (addr boolean) <- get self, cursor-in-globals?
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compare *cursor-in-globals-a, 0/false
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break-if-=
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edit-globals globals, key
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}
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# update sandbox whether the cursor is in globals or sandbox
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edit-sandbox sandbox, key, globals, data-disk
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}
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return
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}
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# ctrl-g: go to a function (or the repl)
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{
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compare key, 7/ctrl-g
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break-if-!=
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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compare *cursor-in-function-modal-a, 0/false
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break-if-!=
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# look for a word to prepopulate the modal
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var current-word-storage: (stream byte 0x40)
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var current-word/edi: (addr stream byte) <- address current-word-storage
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word-at-cursor self, current-word
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var partial-function-name-ah/eax: (addr handle gap-buffer) <- get self, partial-function-name
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var partial-function-name/eax: (addr gap-buffer) <- lookup *partial-function-name-ah
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clear-gap-buffer partial-function-name
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load-gap-buffer-from-stream partial-function-name, current-word
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# enable the modal
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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copy-to *cursor-in-function-modal-a, 1/true
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return
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}
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# dispatch to function modal if necessary
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{
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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compare *cursor-in-function-modal-a, 0/false
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break-if-=
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# nested events for modal dialog
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# ignore spaces
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{
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compare key, 0x20/space
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break-if-!=
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return
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}
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# esc = exit modal dialog
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{
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compare key, 0x1b/escape
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break-if-!=
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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copy-to *cursor-in-function-modal-a, 0/false
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return
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}
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# enter = switch to function name and exit modal dialog
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{
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compare key, 0xa/newline
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break-if-!=
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# done with function modal
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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copy-to *cursor-in-function-modal-a, 0/false
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# if no function name typed in, switch to sandbox
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var partial-function-name-ah/eax: (addr handle gap-buffer) <- get self, partial-function-name
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var partial-function-name/eax: (addr gap-buffer) <- lookup *partial-function-name-ah
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{
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var empty?/eax: boolean <- gap-buffer-empty? partial-function-name
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compare empty?, 0/false
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break-if-=
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var cursor-in-globals-a/eax: (addr boolean) <- get self, cursor-in-globals?
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copy-to *cursor-in-globals-a, 0/false
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return
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}
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# turn function name into a stream
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var name-storage: (stream byte 0x40)
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var name/ecx: (addr stream byte) <- address name-storage
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emit-gap-buffer partial-function-name, name
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clear-gap-buffer partial-function-name
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# compute function index
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var index/ecx: int <- find-symbol-in-globals globals, name
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# if function not found, return
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{
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compare index, 0
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break-if->=
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return
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}
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# otherwise switch focus to function at index
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var globals-cursor-index/eax: (addr int) <- get globals, cursor-index
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copy-to *globals-cursor-index, index
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var cursor-in-globals-a/ecx: (addr boolean) <- get self, cursor-in-globals?
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copy-to *cursor-in-globals-a, 1/true
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return
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}
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# otherwise process like a regular gap-buffer
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var partial-function-name-ah/eax: (addr handle gap-buffer) <- get self, partial-function-name
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var partial-function-name/eax: (addr gap-buffer) <- lookup *partial-function-name-ah
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edit-gap-buffer partial-function-name, key
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return
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}
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# dispatch the key to either sandbox or globals
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{
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var cursor-in-globals-a/eax: (addr boolean) <- get self, cursor-in-globals?
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compare *cursor-in-globals-a, 0/false
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break-if-=
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edit-globals globals, key
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return
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}
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edit-sandbox sandbox, key, globals, data-disk
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}
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## details
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fn word-at-cursor _self: (addr environment), out: (addr stream byte) {
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var self/esi: (addr environment) <- copy _self
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var cursor-in-function-modal-a/eax: (addr boolean) <- get self, cursor-in-function-modal?
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compare *cursor-in-function-modal-a, 0/false
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{
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break-if-=
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# cursor in function modal
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return
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}
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var cursor-in-globals-a/edx: (addr boolean) <- get self, cursor-in-globals?
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compare *cursor-in-globals-a, 0/false
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{
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break-if-=
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# cursor in some function editor
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var globals/eax: (addr global-table) <- get self, globals
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var cursor-index-addr/ecx: (addr int) <- get globals, cursor-index
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var cursor-index/ecx: int <- copy *cursor-index-addr
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var globals-data-ah/eax: (addr handle array global) <- get globals, data
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var globals-data/eax: (addr array global) <- lookup *globals-data-ah
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var cursor-offset/ecx: (offset global) <- compute-offset globals-data, cursor-index
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var curr-global/eax: (addr global) <- index globals-data, cursor-offset
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var curr-global-data-ah/eax: (addr handle gap-buffer) <- get curr-global, input
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var curr-global-data/eax: (addr gap-buffer) <- lookup *curr-global-data-ah
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word-at-gap curr-global-data, out
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return
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}
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# cursor in sandbox
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var sandbox/ecx: (addr sandbox) <- get self, sandbox
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var sandbox-data-ah/eax: (addr handle gap-buffer) <- get sandbox, data
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var sandbox-data/eax: (addr gap-buffer) <- lookup *sandbox-data-ah
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word-at-gap sandbox-data, out
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}
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fn render-function-modal screen: (addr screen), _self: (addr environment) {
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var self/esi: (addr environment) <- copy _self
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var width/eax: int <- copy 0
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var height/ecx: int <- copy 0
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width, height <- screen-size screen
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# xmin = max(0, width/2 - 0x20)
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var xmin: int
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var tmp/edx: int <- copy width
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tmp <- shift-right 1
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tmp <- subtract 0x20/half-function-name-capacity
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{
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compare tmp, 0
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break-if->=
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tmp <- copy 0
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}
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copy-to xmin, tmp
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# xmax = min(width, width/2 + 0x20)
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var xmax: int
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tmp <- copy width
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tmp <- shift-right 1
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tmp <- add 0x20/half-function-name-capacity
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{
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compare tmp, width
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break-if-<=
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tmp <- copy width
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}
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copy-to xmax, tmp
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# ymin = height/2 - 2
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var ymin: int
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tmp <- copy height
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tmp <- shift-right 1
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tmp <- subtract 2
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copy-to ymin, tmp
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# ymax = height/2 + 1
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var ymax: int
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tmp <- add 3
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copy-to ymax, tmp
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#
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clear-rect screen, xmin, ymin, xmax, ymax, 0xf/bg=modal
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add-to xmin, 4
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set-cursor-position screen, xmin, ymin
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draw-text-rightward-from-cursor screen, "go to function (or leave blank to go to REPL)", xmax, 8/fg=dark-grey, 0xf/bg=modal
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var partial-function-name-ah/eax: (addr handle gap-buffer) <- get self, partial-function-name
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var _partial-function-name/eax: (addr gap-buffer) <- lookup *partial-function-name-ah
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var partial-function-name/edx: (addr gap-buffer) <- copy _partial-function-name
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subtract-from xmin, 4
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add-to ymin 2
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var dummy/eax: int <- copy 0
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var dummy2/ecx: int <- copy 0
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dummy, dummy2 <- render-gap-buffer-wrapping-right-then-down screen, partial-function-name, xmin, ymin, xmax, ymax, 1/always-render-cursor, 0/fg=black, 0xf/bg=modal
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}
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fn render-function-modal-menu screen: (addr screen), _self: (addr environment) {
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var self/esi: (addr environment) <- copy _self
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var _width/eax: int <- copy 0
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var height/ecx: int <- copy 0
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_width, height <- screen-size screen
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var width/edx: int <- copy _width
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var y/ecx: int <- copy height
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y <- decrement
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var height/ebx: int <- copy y
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height <- increment
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clear-rect screen, 0/x, y, width, height, 0xc5/bg=blue-bg
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set-cursor-position screen, 0/x, y
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draw-text-rightward-from-cursor screen, " ^r ", width, 0/fg, 0x5c/bg=menu-highlight
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draw-text-rightward-from-cursor screen, " run main ", width, 7/fg, 0xc5/bg=blue-bg
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draw-text-rightward-from-cursor screen, " enter ", width, 0/fg, 0x5c/bg=menu-highlight
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draw-text-rightward-from-cursor screen, " submit ", width, 7/fg, 0xc5/bg=blue-bg
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draw-text-rightward-from-cursor screen, " esc ", width, 0/fg, 0x5c/bg=menu-highlight
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draw-text-rightward-from-cursor screen, " cancel ", width, 7/fg, 0xc5/bg=blue-bg
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draw-text-rightward-from-cursor screen, " ^a ", width, 0/fg, 0x5c/bg=menu-highlight
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draw-text-rightward-from-cursor screen, " << ", width, 7/fg, 0xc5/bg=blue-bg
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|
draw-text-rightward-from-cursor screen, " ^b ", width, 0/fg, 0x5c/bg=menu-highlight
|
|
draw-text-rightward-from-cursor screen, " <word ", width, 7/fg, 0xc5/bg=blue-bg
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|
draw-text-rightward-from-cursor screen, " ^f ", width, 0/fg, 0x5c/bg=menu-highlight
|
|
draw-text-rightward-from-cursor screen, " word> ", width, 7/fg, 0xc5/bg=blue-bg
|
|
draw-text-rightward-from-cursor screen, " ^e ", width, 0/fg, 0x5c/bg=menu-highlight
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draw-text-rightward-from-cursor screen, " >> ", width, 7/fg, 0xc5/bg=blue-bg
|
|
}
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|
|
|
# Gotcha: some saved state may not load.
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|
fn load-state _self: (addr environment), data-disk: (addr disk) {
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var self/esi: (addr environment) <- copy _self
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|
# data-disk -> stream
|
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var s-storage: (stream byte 0x2000) # space for 16/sectors
|
|
var s/ebx: (addr stream byte) <- address s-storage
|
|
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "loading sectors from data disk", 3/fg, 0/bg
|
|
move-cursor-to-left-margin-of-next-line 0/screen
|
|
load-sectors data-disk, 0/lba, 0x10/sectors, s
|
|
#? draw-stream-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, s, 7/fg, 0xc5/bg=blue-bg
|
|
# stream -> gap-buffer (HACK: we temporarily cannibalize the sandbox's gap-buffer)
|
|
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "parsing", 3/fg, 0/bg
|
|
move-cursor-to-left-margin-of-next-line 0/screen
|
|
var sandbox/eax: (addr sandbox) <- get self, sandbox
|
|
var data-ah/eax: (addr handle gap-buffer) <- get sandbox, data
|
|
var data/eax: (addr gap-buffer) <- lookup *data-ah
|
|
load-gap-buffer-from-stream data, s
|
|
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, " into gap buffer", 3/fg, 0/bg
|
|
move-cursor-to-left-margin-of-next-line 0/screen
|
|
clear-stream s
|
|
# read: gap-buffer -> cell
|
|
var initial-root-storage: (handle cell)
|
|
var initial-root/ecx: (addr handle cell) <- address initial-root-storage
|
|
var trace-storage: trace
|
|
var trace/edi: (addr trace) <- address trace-storage
|
|
initialize-trace trace, 1/only-errors, 0x10/capacity, 0/visible
|
|
read-cell data, initial-root, trace
|
|
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, " into s-expressions", 3/fg, 0/bg
|
|
move-cursor-to-left-margin-of-next-line 0/screen
|
|
clear-gap-buffer data
|
|
#
|
|
{
|
|
var initial-root-addr/eax: (addr cell) <- lookup *initial-root
|
|
compare initial-root-addr, 0
|
|
break-if-!=
|
|
return
|
|
}
|
|
# load globals from assoc(initial-root, 'globals)
|
|
var globals-literal-storage: (handle cell)
|
|
var globals-literal-ah/eax: (addr handle cell) <- address globals-literal-storage
|
|
new-symbol globals-literal-ah, "globals"
|
|
var globals-literal/eax: (addr cell) <- lookup *globals-literal-ah
|
|
var globals-cell-storage: (handle cell)
|
|
var globals-cell-ah/edx: (addr handle cell) <- address globals-cell-storage
|
|
clear-trace trace
|
|
lookup-symbol globals-literal, globals-cell-ah, *initial-root, 0/no-globals, trace, 0/no-screen, 0/no-keyboard
|
|
var globals-cell/eax: (addr cell) <- lookup *globals-cell-ah
|
|
{
|
|
compare globals-cell, 0
|
|
break-if-=
|
|
var globals/eax: (addr global-table) <- get self, globals
|
|
load-globals globals-cell-ah, globals
|
|
}
|
|
# sandbox = assoc(initial-root, 'sandbox)
|
|
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "loading sandbox", 3/fg, 0/bg
|
|
var sandbox-literal-storage: (handle cell)
|
|
var sandbox-literal-ah/eax: (addr handle cell) <- address sandbox-literal-storage
|
|
new-symbol sandbox-literal-ah, "sandbox"
|
|
var sandbox-literal/eax: (addr cell) <- lookup *sandbox-literal-ah
|
|
var sandbox-cell-storage: (handle cell)
|
|
var sandbox-cell-ah/edx: (addr handle cell) <- address sandbox-cell-storage
|
|
clear-trace trace
|
|
lookup-symbol sandbox-literal, sandbox-cell-ah, *initial-root, 0/no-globals, trace, 0/no-screen, 0/no-keyboard
|
|
var sandbox-cell/eax: (addr cell) <- lookup *sandbox-cell-ah
|
|
{
|
|
compare sandbox-cell, 0
|
|
break-if-=
|
|
# print: cell -> stream
|
|
clear-trace trace
|
|
print-cell sandbox-cell-ah, s, trace
|
|
# stream -> gap-buffer
|
|
var sandbox/eax: (addr sandbox) <- get self, sandbox
|
|
var data-ah/eax: (addr handle gap-buffer) <- get sandbox, data
|
|
var data/eax: (addr gap-buffer) <- lookup *data-ah
|
|
load-gap-buffer-from-stream data, s
|
|
}
|
|
}
|
|
|
|
# Save state as an alist of alists:
|
|
# ((globals . ((a . (fn ...))
|
|
# ...))
|
|
# (sandbox . ...))
|
|
fn store-state data-disk: (addr disk), sandbox: (addr sandbox), globals: (addr global-table) {
|
|
compare data-disk, 0/no-disk
|
|
{
|
|
break-if-!=
|
|
return
|
|
}
|
|
var stream-storage: (stream byte 0x2000) # space enough for 16/sectors
|
|
var stream/edi: (addr stream byte) <- address stream-storage
|
|
write stream, "(\n"
|
|
write-globals stream, globals
|
|
write-sandbox stream, sandbox
|
|
write stream, ")\n"
|
|
store-sectors data-disk, 0/lba, 0x10/sectors, stream
|
|
}
|