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feat(examples): add rstream-spreadsheet example
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.cache | ||
out | ||
node_modules | ||
yarn.lock | ||
*.js |
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# rstream-spreadsheet | ||
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[Live demo](http://demo.thi.ng/umbrella/rstream-spreadsheet/) | ||
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Please refer to the [example build instructions](https://github.com/thi-ng/umbrella/wiki/Example-build-instructions) on the wiki. | ||
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## Authors | ||
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- Karsten Schmidt | ||
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## License | ||
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© 2019 Karsten Schmidt // Apache Software License 2.0 |
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<!DOCTYPE html> | ||
<html lang="en"> | ||
<head> | ||
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> | ||
<meta name="viewport" content="width=device-width, initial-scale=1.0" /> | ||
<meta http-equiv="X-UA-Compatible" content="ie=edge" /> | ||
<title>rstream-spreadsheet</title> | ||
<!-- <link href="https://unpkg.com/tachyons@4/css/tachyons.min.css" rel="stylesheet"> --> | ||
<link href="tachyons.min.css" rel="stylesheet" /> | ||
<style></style> | ||
</head> | ||
<body class="sans-serif"> | ||
<div id="app"></div> | ||
<div> | ||
<a | ||
class="link" | ||
href="https://github.com/thi-ng/umbrella/tree/master/examples/spreadsheet" | ||
>Source code</a | ||
> | ||
</div> | ||
<script type="text/javascript" src="./src/index.ts"></script> | ||
</body> | ||
</html> |
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{ | ||
"name": "rstream-spreadsheet", | ||
"version": "0.0.1", | ||
"repository": "https://github.com/thi-ng/umbrella", | ||
"author": "Karsten Schmidt <k+npm@thi.ng>", | ||
"license": "Apache-2.0", | ||
"scripts": { | ||
"clean": "rm -rf .cache build out", | ||
"build": "yarn clean && parcel build index.html -d out --public-url ./ --no-source-maps --no-cache --detailed-report --experimental-scope-hoisting", | ||
"build:webpack": "../../node_modules/.bin/webpack --mode production", | ||
"start": "parcel index.html -p 8080 --open" | ||
}, | ||
"devDependencies": { | ||
"parcel-bundler": "^1.12.3", | ||
"terser": "^3.17.0", | ||
"typescript": "^3.4.1" | ||
}, | ||
"dependencies": { | ||
"@thi.ng/api": "latest", | ||
"@thi.ng/rstream": "latest", | ||
"@thi.ng/transducers-hdom": "latest" | ||
}, | ||
"browserslist": [ | ||
"last 3 Chrome versions" | ||
], | ||
"browser": { | ||
"process": false | ||
} | ||
} |
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import { ConsoleLogger, IObjectOf } from "@thi.ng/api"; | ||
import { Atom } from "@thi.ng/atom"; | ||
import { isNumber } from "@thi.ng/checks"; | ||
import { ILifecycle } from "@thi.ng/hdom"; | ||
import { memoize1 } from "@thi.ng/memoize"; | ||
import { setIn, setInMany } from "@thi.ng/paths"; | ||
import { fromAtom, fromView, setLogger } from "@thi.ng/rstream"; | ||
import { | ||
add, | ||
addNode, | ||
div, | ||
mul, | ||
Node, | ||
NodeInputSpec, | ||
removeNode, | ||
sub | ||
} from "@thi.ng/rstream-graph"; | ||
import { charRange, float, maybeParseFloat } from "@thi.ng/strings"; | ||
import { | ||
assocObj, | ||
comp, | ||
map, | ||
mapIndexed, | ||
partition, | ||
permutations, | ||
push, | ||
range, | ||
transduce | ||
} from "@thi.ng/transducers"; | ||
import { updateDOM } from "@thi.ng/transducers-hdom"; | ||
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const NUM_COLS = 4; | ||
const NUM_ROWS = 10; | ||
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const MAX_COL = "A".charCodeAt(0) + NUM_COLS - 1; | ||
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const RE_OP2 = /^=\s*([A-Z]\d+)\s*([+*/\-])\s*([A-Z]\d+)$/i; | ||
const RE_SUM = /^=\s*SUM\(\s*([A-Z])(\d+)\s*\:\s*([A-Z])(\d+)\s*\)$/i; | ||
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const CELL_STYLE = "div.dib.h2.pa2.ma0.br.bb"; | ||
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interface Cell { | ||
formula: string; | ||
value: string | number; | ||
backup: string; | ||
focus: boolean; | ||
error: boolean; | ||
} | ||
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interface UICell extends ILifecycle { | ||
element?: HTMLDivElement; | ||
focus?: boolean; | ||
} | ||
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const DB = new Atom<IObjectOf<Cell>>( | ||
transduce( | ||
map(([col, row]) => [ | ||
`${col}${row}`, | ||
{ formula: "", value: "", backup: "", focus: false, error: false } | ||
]), | ||
assocObj(), | ||
permutations(charRange("A", MAX_COL), range(1, NUM_ROWS + 1)) | ||
) | ||
); | ||
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const graph: IObjectOf<Node> = {}; | ||
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const removeCell = (id: string) => removeNode(graph, id); | ||
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const focusCell = (id: string) => { | ||
DB.swapIn(id, (cell: Cell) => | ||
setInMany(cell, "focus", true, "backup", cell.formula) | ||
); | ||
}; | ||
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const blurCell = (id: string) => { | ||
DB.swapIn(id, (cell: Cell) => setIn(cell, "focus", false)); | ||
}; | ||
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const cancelCell = (id: string) => { | ||
DB.swapIn(id, (cell: Cell) => | ||
setInMany(cell, "focus", false, "formula", cell.backup) | ||
); | ||
}; | ||
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const updateCell = (id: string, val: string) => { | ||
if (val.startsWith("=")) { | ||
DB.resetIn([id, "formula"], val); | ||
let res = RE_OP2.exec(val); | ||
if (res) { | ||
DB.resetIn([id, "error"], false); | ||
addBinOp(res, id); | ||
} else if ((res = RE_SUM.exec(val))) { | ||
DB.resetIn([id, "error"], false); | ||
addSum(res, id); | ||
} else { | ||
DB.resetIn([id, "error"], true); | ||
} | ||
} else { | ||
removeCell(id); | ||
DB.swapIn(id, (cell) => | ||
setInMany(cell, "value", val, "formula", "", "error", false) | ||
); | ||
} | ||
}; | ||
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const cellInput = memoize1( | ||
(id: string): NodeInputSpec => ({ | ||
stream: () => | ||
fromView(DB, [id.toUpperCase(), "value"], (x) => | ||
maybeParseFloat(x, 0) | ||
) | ||
}) | ||
); | ||
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const addBinOp = ([_, a, op, b]: RegExpExecArray, id: string) => { | ||
removeCell(id); | ||
addNode(graph, DB, id, { | ||
fn: (<any>{ "+": add, "*": mul, "-": sub, "/": div })[op], | ||
ins: { a: cellInput(a), b: cellInput(b) }, | ||
outs: { | ||
"*": [id, "value"] | ||
} | ||
}); | ||
}; | ||
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const addSum = ( | ||
[_, acol, arow, bcol, brow]: RegExpExecArray, | ||
cellID: string | ||
) => { | ||
removeCell(cellID); | ||
addNode(graph, DB, cellID, { | ||
fn: add, | ||
ins: transduce( | ||
comp(map(([c, r]) => `${c}${r}`), map((id) => [id, cellInput(id)])), | ||
assocObj<NodeInputSpec>(), | ||
permutations( | ||
charRange(acol.toUpperCase(), bcol.toUpperCase()), | ||
range(parseInt(arow), parseInt(brow) + 1) | ||
) | ||
), | ||
outs: { | ||
"*": [cellID, "value"] | ||
} | ||
}); | ||
}; | ||
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const formatCell = (x: string | number) => (isNumber(x) ? float(2)(x) : x); | ||
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const cellBackground = (cell: any) => | ||
cell.focus | ||
? "bg-yellow" | ||
: cell.formula | ||
? cell.error | ||
? "bg-red" | ||
: "bg-light-green" | ||
: ""; | ||
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const cell = ([row, col]: [number, string]) => | ||
<UICell>{ | ||
init(el: HTMLDivElement) { | ||
this.element = el; | ||
this.focus = false; | ||
}, | ||
render(_: any, cells: any) { | ||
const id = `${col}${row}`; | ||
const cell = cells[id]; | ||
return [ | ||
`${CELL_STYLE}.w4.overflow-y-hidden.overflow-x-scroll`, | ||
{ | ||
class: cellBackground(cell), | ||
contentEditable: true, | ||
onfocus: () => { | ||
this.focus = true; | ||
focusCell(id); | ||
}, | ||
onblur: () => { | ||
if (this.focus) { | ||
updateCell(id, this.element!.textContent!.trim()); | ||
this.focus = false; | ||
} | ||
blurCell(id); | ||
}, | ||
onkeydown: (e: KeyboardEvent) => { | ||
switch (e.key) { | ||
case "Enter": | ||
case "Tab": | ||
updateCell( | ||
id, | ||
this.element!.textContent!.trim() | ||
); | ||
this.element!.blur(); | ||
break; | ||
case "Escape": | ||
this.focus = false; | ||
cancelCell(id); | ||
this.element!.blur(); | ||
} | ||
} | ||
}, | ||
String( | ||
cell.focus && cell.formula | ||
? cell.formula | ||
: formatCell(cell.value) | ||
) | ||
]; | ||
} | ||
}; | ||
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const app = () => { | ||
const CELLS: UICell[][] = transduce( | ||
comp(map(cell), partition(NUM_COLS)), | ||
push(), | ||
permutations(range(1, NUM_ROWS + 1), charRange("A", MAX_COL)) | ||
); | ||
return (state: any) => [ | ||
"div", | ||
{}, | ||
[`${CELL_STYLE}.w2.b.bg-moon-gray`, "\u00a0"], | ||
map( | ||
(col) => [`${CELL_STYLE}.w4.b.bg-moon-gray`, {}, col], | ||
charRange("A", MAX_COL) | ||
), | ||
mapIndexed( | ||
(i, rowid) => [ | ||
"div", | ||
{}, | ||
[ | ||
`${CELL_STYLE}.w2.b.bg-moon-gray.overflow-y-hidden.overflow-x-scroll`, | ||
{}, | ||
rowid | ||
], | ||
...CELLS[i].map((cell) => [cell, state]) | ||
], | ||
range(1, NUM_ROWS + 1) | ||
) | ||
]; | ||
}; | ||
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// setLogger(new ConsoleLogger("rstream")); | ||
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const main = fromAtom(DB); | ||
main.transform(map(app()), updateDOM({ span: false })); | ||
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(<any>window)["DB"] = DB; | ||
(<any>window)["graph"] = graph; | ||
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if (process.env.NODE_ENV !== "production") { | ||
const hot = (<any>module).hot; | ||
hot && hot.dispose(() => main.done()); | ||
} |
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{ | ||
"extends": "../../tsconfig.json", | ||
"compilerOptions": { | ||
"outDir": ".", | ||
"target": "es6", | ||
"sourceMap": true | ||
}, | ||
"include": [ | ||
"./src/**/*.ts" | ||
] | ||
} |