572 lines
20 KiB
Forth
572 lines
20 KiB
Forth
# code-point-utf8 stacks are the smallest unit of editable text
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type grapheme-stack {
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data: (handle array code-point-utf8)
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top: int
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}
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fn initialize-grapheme-stack _self: (addr grapheme-stack), n: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var d/edi: (addr handle array code-point-utf8) <- get self, data
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populate d, n
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var top/eax: (addr int) <- get self, top
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copy-to *top, 0
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}
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fn clear-grapheme-stack _self: (addr grapheme-stack) {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top/eax: (addr int) <- get self, top
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copy-to *top, 0
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}
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fn grapheme-stack-empty? _self: (addr grapheme-stack) -> _/eax: boolean {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top/eax: (addr int) <- get self, top
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compare *top, 0
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{
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break-if-!=
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return 1/true
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}
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return 0/false
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}
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fn grapheme-stack-length _self: (addr grapheme-stack) -> _/eax: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top/eax: (addr int) <- get self, top
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return *top
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}
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fn push-grapheme-stack _self: (addr grapheme-stack), _val: code-point-utf8 {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top-addr/ecx: (addr int) <- get self, top
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var data-ah/edx: (addr handle array code-point-utf8) <- get self, data
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var data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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var dest-addr/edx: (addr code-point-utf8) <- index data, top
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var val/eax: code-point-utf8 <- copy _val
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copy-to *dest-addr, val
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add-to *top-addr, 1
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}
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fn pop-grapheme-stack _self: (addr grapheme-stack) -> _/eax: code-point-utf8 {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top-addr/ecx: (addr int) <- get self, top
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{
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compare *top-addr, 0
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break-if->
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return -1
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}
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subtract-from *top-addr, 1
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var data-ah/edx: (addr handle array code-point-utf8) <- get self, data
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var data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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var result-addr/eax: (addr code-point-utf8) <- index data, top
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return *result-addr
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}
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fn copy-grapheme-stack _src: (addr grapheme-stack), dest: (addr grapheme-stack) {
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var src/esi: (addr grapheme-stack) <- copy _src
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var data-ah/edi: (addr handle array code-point-utf8) <- get src, data
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var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var data/edi: (addr array code-point-utf8) <- copy _data
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var top-addr/ecx: (addr int) <- get src, top
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var i/eax: int <- copy 0
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{
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compare i, *top-addr
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break-if->=
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var g/edx: (addr code-point-utf8) <- index data, i
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push-grapheme-stack dest, *g
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i <- increment
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loop
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}
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}
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# dump stack to screen from bottom to top
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# hardcoded colors:
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# matching paren
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fn render-stack-from-bottom-wrapping-right-then-down screen: (addr screen), _self: (addr grapheme-stack), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, highlight-matching-open-paren?: boolean, open-paren-depth: int, color: int, background-color: int -> _/eax: int, _/ecx: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var matching-open-paren-index/edx: int <- get-matching-open-paren-index self, highlight-matching-open-paren?, open-paren-depth
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var data-ah/edi: (addr handle array code-point-utf8) <- get self, data
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var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var data/edi: (addr array code-point-utf8) <- copy _data
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var x/eax: int <- copy _x
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var y/ecx: int <- copy _y
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var top-addr/esi: (addr int) <- get self, top
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var i/ebx: int <- copy 0
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{
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compare i, *top-addr
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break-if->=
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{
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var c: code-point
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{
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var g/eax: (addr code-point-utf8) <- index data, i
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var tmp/eax: code-point <- to-code-point *g
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copy-to c, tmp
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}
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var fg: int
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{
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var tmp/eax: int <- copy color
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copy-to fg, tmp
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}
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{
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compare i, matching-open-paren-index
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break-if-!=
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copy-to fg, 0xf/highlight
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}
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x, y <- render-code-point screen, c, xmin, ymin, xmax, ymax, x, y, fg, background-color # TODO: handle combining characters
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}
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i <- increment
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loop
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}
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return x, y
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}
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# helper for small words
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fn render-stack-from-bottom screen: (addr screen), self: (addr grapheme-stack), x: int, y: int, highlight-matching-open-paren?: boolean, open-paren-depth: int -> _/eax: int {
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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 height/ebx: int <- copy _height
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var x2/eax: int <- copy 0
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var y2/ecx: int <- copy 0
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x2, y2 <- render-stack-from-bottom-wrapping-right-then-down screen, self, x, y, width, height, x, y, highlight-matching-open-paren?, open-paren-depth, 3/fg=cyan, 0xc5/bg=blue-bg
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return x2 # y2? yolo
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}
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# dump stack to screen from top to bottom
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# optionally render a 'cursor' with the top code-point-utf8
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# hard-coded colors:
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# matching paren
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# cursor
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fn render-stack-from-top-wrapping-right-then-down screen: (addr screen), _self: (addr grapheme-stack), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, render-cursor?: boolean, color: int, background-color: int -> _/eax: int, _/ecx: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var matching-close-paren-index/edx: int <- get-matching-close-paren-index self, render-cursor?
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var data-ah/eax: (addr handle array code-point-utf8) <- get self, data
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var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var data/edi: (addr array code-point-utf8) <- copy _data
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var x/eax: int <- copy _x
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var y/ecx: int <- copy _y
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var top-addr/ebx: (addr int) <- get self, top
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var i/ebx: int <- copy *top-addr
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i <- decrement
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# if render-cursor?, peel off first iteration
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{
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compare render-cursor?, 0/false
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break-if-=
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compare i, 0
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break-if-<
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var c: code-point
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{
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var g/eax: (addr code-point-utf8) <- index data, i
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var tmp/eax: code-point <- to-code-point *g
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copy-to c, tmp
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}
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x, y <- render-code-point screen, c, xmin, ymin, xmax, ymax, x, y, background-color, color
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i <- decrement
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}
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# remaining iterations
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{
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compare i, 0
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break-if-<
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# highlight matching paren if needed
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var fg: int
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{
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var tmp/eax: int <- copy color
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copy-to fg, tmp
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}
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compare i, matching-close-paren-index
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{
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break-if-!=
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copy-to fg, 0xf/highlight
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}
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#
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var c: code-point
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{
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var g/eax: (addr code-point-utf8) <- index data, i
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var tmp/eax: code-point <- to-code-point *g
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copy-to c, tmp
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}
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x, y <- render-code-point screen, c, xmin, ymin, xmax, ymax, x, y, fg, background-color
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i <- decrement
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loop
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}
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return x, y
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}
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# helper for small words
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fn render-stack-from-top screen: (addr screen), self: (addr grapheme-stack), x: int, y: int, render-cursor?: boolean -> _/eax: int {
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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 height/ebx: int <- copy _height
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var x2/eax: int <- copy 0
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var y2/ecx: int <- copy 0
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x2, y2 <- render-stack-from-top-wrapping-right-then-down screen, self, x, y, width, height, x, y, render-cursor?, 3/fg=cyan, 0xc5/bg=blue-bg
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return x2 # y2? yolo
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}
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fn test-render-grapheme-stack {
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# setup: gs = "abc"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 5
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var g/eax: code-point-utf8 <- copy 0x61/a
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x63/c
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 0/y, 0/no-highlight-matching-open-paren, 0/open-paren-depth
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check-screen-row screen, 0/y, "abc ", "F - test-render-grapheme-stack from bottom"
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check-ints-equal x, 3, "F - test-render-grapheme-stack from bottom: result"
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check-background-color-in-screen-row screen, 3/bg=reverse, 0/y, " ", "F - test-render-grapheme-stack from bottom: bg"
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#
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var x/eax: int <- render-stack-from-top screen, gs, 0/x, 1/y, 0/cursor=false
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check-screen-row screen, 1/y, "cba ", "F - test-render-grapheme-stack from top without cursor"
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check-ints-equal x, 3, "F - test-render-grapheme-stack from top without cursor: result"
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check-background-color-in-screen-row screen, 3/bg=reverse, 1/y, " ", "F - test-render-grapheme-stack from top without cursor: bg"
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#
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var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
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check-screen-row screen, 2/y, "cba ", "F - test-render-grapheme-stack from top with cursor"
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check-ints-equal x, 3, "F - test-render-grapheme-stack from top with cursor: result"
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check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack from top with cursor: bg"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-close-paren {
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# setup: gs = "(b)"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 5
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var g/eax: code-point-utf8 <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
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check-screen-row screen, 2/y, "(b) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren"
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check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren: cursor"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren: matching paren"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-close-paren-2 {
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# setup: gs = "(a (b)) c"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 0x10
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var g/eax: code-point-utf8 <- copy 0x63/c
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push-grapheme-stack gs, g
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g <- copy 0x20/space
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x20/space
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push-grapheme-stack gs, g
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g <- copy 0x61/a
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
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check-screen-row screen, 2/y, "(a (b)) c ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2"
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check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2: cursor"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2: matching paren"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end {
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# setup: gs = "(b)"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 5
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var g/eax: code-point-utf8 <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 1/open-paren-depth
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check-screen-row screen, 2/y, "(b) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, "( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end: matching paren"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2 {
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# setup: gs = "a((b))"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 0x10
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var g/eax: code-point-utf8 <- copy 0x61/a
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 1/open-paren-depth
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check-screen-row screen, 2/y, "a((b)) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2: matching paren"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-open-paren {
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# setup: gs = "(b"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 5
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var g/eax: code-point-utf8 <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 0/open-paren-depth
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check-screen-row screen, 2/y, "(b ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, "( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren: matching paren"
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}
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fn test-render-grapheme-stack-while-highlighting-matching-open-paren-2 {
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# setup: gs = "a((b)"
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var gs-storage: grapheme-stack
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var gs/edi: (addr grapheme-stack) <- address gs-storage
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initialize-grapheme-stack gs, 0x10
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var g/eax: code-point-utf8 <- copy 0x61/a
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x28/open-paren
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push-grapheme-stack gs, g
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g <- copy 0x62/b
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push-grapheme-stack gs, g
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g <- copy 0x29/close-paren
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push-grapheme-stack gs, g
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# setup: screen
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var screen-storage: screen
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var screen/esi: (addr screen) <- address screen-storage
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initialize-screen screen, 5, 4, 0/no-pixel-graphics
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#
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var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 0/open-paren-depth
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check-screen-row screen, 2/y, "a((b) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-2"
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check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-2: matching paren"
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}
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# return the index of the matching close-paren of the code-point-utf8 at cursor (top of stack)
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# or top index if there's no matching close-paren
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fn get-matching-close-paren-index _self: (addr grapheme-stack), render-cursor?: boolean -> _/edx: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top-addr/edx: (addr int) <- get self, top
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# if not rendering cursor, return
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compare render-cursor?, 0/false
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{
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break-if-!=
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return *top-addr
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}
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var data-ah/eax: (addr handle array code-point-utf8) <- get self, data
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var data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var i/ecx: int <- copy *top-addr
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# if stack is empty, return
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compare i, 0
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{
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break-if->
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return *top-addr
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}
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# if cursor is not '(' return
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i <- decrement
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var g/esi: (addr code-point-utf8) <- index data, i
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compare *g, 0x28/open-paren
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{
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break-if-=
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return *top-addr
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}
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# otherwise scan to matching paren
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var paren-count/ebx: int <- copy 1
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i <- decrement
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{
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compare i, 0
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break-if-<
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var g/esi: (addr code-point-utf8) <- index data, i
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compare *g, 0x28/open-paren
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{
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break-if-!=
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paren-count <- increment
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}
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compare *g, 0x29/close-paren
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{
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break-if-!=
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compare paren-count, 1
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{
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break-if-!=
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return i
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}
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paren-count <- decrement
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}
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i <- decrement
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loop
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}
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return *top-addr
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}
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# return the index of the first open-paren at the given depth
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# or top index if there's no matching close-paren
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fn get-matching-open-paren-index _self: (addr grapheme-stack), control: boolean, depth: int -> _/edx: int {
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var self/esi: (addr grapheme-stack) <- copy _self
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var top-addr/edx: (addr int) <- get self, top
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# if not rendering cursor, return
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compare control, 0/false
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{
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break-if-!=
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return *top-addr
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}
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var data-ah/eax: (addr handle array code-point-utf8) <- get self, data
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var data/eax: (addr array code-point-utf8) <- lookup *data-ah
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var i/ecx: int <- copy *top-addr
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# if stack is empty, return
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compare i, 0
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{
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|
break-if->
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return *top-addr
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}
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# scan to matching open paren
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var paren-count/ebx: int <- copy 0
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i <- decrement
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{
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|
compare i, 0
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|
break-if-<
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var g/esi: (addr code-point-utf8) <- index data, i
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|
compare *g, 0x29/close-paren
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|
{
|
|
break-if-!=
|
|
paren-count <- increment
|
|
}
|
|
compare *g, 0x28/open-paren
|
|
{
|
|
break-if-!=
|
|
compare paren-count, depth
|
|
{
|
|
break-if-!=
|
|
return i
|
|
}
|
|
paren-count <- decrement
|
|
}
|
|
i <- decrement
|
|
loop
|
|
}
|
|
return *top-addr
|
|
}
|
|
|
|
# compare from bottom
|
|
# beware: modifies 'stream', which must be disposed of after a false result
|
|
fn prefix-match? _self: (addr grapheme-stack), s: (addr stream byte) -> _/eax: boolean {
|
|
var self/esi: (addr grapheme-stack) <- copy _self
|
|
var data-ah/edi: (addr handle array code-point-utf8) <- get self, data
|
|
var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
|
|
var data/edi: (addr array code-point-utf8) <- copy _data
|
|
var top-addr/ecx: (addr int) <- get self, top
|
|
var i/ebx: int <- copy 0
|
|
{
|
|
compare i, *top-addr
|
|
break-if->=
|
|
# if curr != expected, return false
|
|
{
|
|
var curr-a/edx: (addr code-point-utf8) <- index data, i
|
|
var expected/eax: code-point-utf8 <- read-code-point-utf8 s
|
|
{
|
|
compare expected, *curr-a
|
|
break-if-=
|
|
return 0/false
|
|
}
|
|
}
|
|
i <- increment
|
|
loop
|
|
}
|
|
return 1 # true
|
|
}
|
|
|
|
# compare from bottom
|
|
# beware: modifies 'stream', which must be disposed of after a false result
|
|
fn suffix-match? _self: (addr grapheme-stack), s: (addr stream byte) -> _/eax: boolean {
|
|
var self/esi: (addr grapheme-stack) <- copy _self
|
|
var data-ah/edi: (addr handle array code-point-utf8) <- get self, data
|
|
var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
|
|
var data/edi: (addr array code-point-utf8) <- copy _data
|
|
var top-addr/eax: (addr int) <- get self, top
|
|
var i/ebx: int <- copy *top-addr
|
|
i <- decrement
|
|
{
|
|
compare i, 0
|
|
break-if-<
|
|
{
|
|
var curr-a/edx: (addr code-point-utf8) <- index data, i
|
|
var expected/eax: code-point-utf8 <- read-code-point-utf8 s
|
|
# if curr != expected, return false
|
|
{
|
|
compare expected, *curr-a
|
|
break-if-=
|
|
return 0/false
|
|
}
|
|
}
|
|
i <- decrement
|
|
loop
|
|
}
|
|
return 1 # true
|
|
}
|
|
|
|
fn grapheme-stack-is-decimal-integer? _self: (addr grapheme-stack) -> _/eax: boolean {
|
|
var self/esi: (addr grapheme-stack) <- copy _self
|
|
var data-ah/eax: (addr handle array code-point-utf8) <- get self, data
|
|
var _data/eax: (addr array code-point-utf8) <- lookup *data-ah
|
|
var data/edx: (addr array code-point-utf8) <- copy _data
|
|
var top-addr/ecx: (addr int) <- get self, top
|
|
var i/ebx: int <- copy 0
|
|
var result/eax: boolean <- copy 1/true
|
|
$grapheme-stack-is-integer?:loop: {
|
|
compare i, *top-addr
|
|
break-if->=
|
|
var g/edx: (addr code-point-utf8) <- index data, i
|
|
result <- decimal-digit? *g
|
|
compare result, 0/false
|
|
break-if-=
|
|
i <- increment
|
|
loop
|
|
}
|
|
return result
|
|
}
|