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/** * Input Float numeric Plain React Hooks function * * props: * value * numeralDecimalScale * onChange * id * className * style */ function InputFloat(props) { const e = React.createElement; const refInput = React.useRef(null); const numeralDecimalScale = React.useRef(props.numeralDecimalScale ? props.numeralDecimalScale : 2); const SaveValue = React.useRef(format(props.value)); const Start = React.useRef(0); const End = React.useRef(0); const [value, setValue] = React.useState({ value: format(props.value) }); // Prop value changed React.useEffect(() => { if (props == undefined || props.value === undefined) { return; } // console.log("change props", props, props.value); if (float(props.value) == float(SaveValue.current)) { // console.log("not change props.value", props, props.value); return; } const v = format(props.value); setV(v, 0, 0); setValue({ value: v }); }, [props.value]); // Set cursor position after change state value React.useEffect(() => { refInput.current.setSelectionRange(Start.current, End.current); }, [value]); function setV(v, start, end) { // console.log("setV", v, start, end); SaveValue.current = v; Start.current = start; End.current = end; } /** * Using: * agh.sprintf.js * https://github.com/akinomyoga/agh.sprintf.js */ function format(v) { // console.log("format from", v); v += ""; const sign = v.indexOf("-") >= 0; const f = float(v); v = sprintf("%'0.0" + numeralDecimalScale.current + "f", f); if (sign && f == 0) { v = "-" + v; } return v; } // convert to float function float(v) { v += ""; const dot = dotPosition(v); let f = parseFloat(v.substring(0, dot + numeralDecimalScale.current + 1).replaceAll(",", "")); if (isNaN(f)) { f = 0; } return f; } function dotPosition(v) { v += ""; let dot = v.indexOf("."); if (dot == -1) { dot = v.length; } return dot; } /** * position より前の位置にある , の数を数える * Count the number of "," before the position of v */ function countComma(v, position) { const targetStr = ","; return (v.substring(0, position).match(new RegExp(targetStr, "g")) || []).length; } function replace(src, position, s) { return format(src.substring(0, position) + s + src.substring(position + s.length)); } function insert(src, position, s) { return format(src.substring(0, position) + s + src.substring(position)); } // src の position 位置から n 文字削除 // Delete n characters from position in src function remove(src, position, n) { return src.substring(0, position) + src.substring(position + n); } function handleKeyDown(e) { // console.log("handleKeyDown", e); // console.log("Key pressed: ", e.key); // console.log("Key pressed: ", e.which); let v = e.target.value; let c = e.key; let start = refInput.current.selectionStart; let end = refInput.current.selectionEnd; if (c == "Process" || c == "Control") { return false; } // console.log("c", c, "start", start, "end", end, "dom", v, "v", v); // Selected if (start != end) { if ((c >= "0" || c <= "9") || c == "-") { const co1 = countComma(v, start); v = remove(v, start, end - start); v = insert(v, start, c); v = format(v); const co2 = countComma(v, start - 1); const co = co1 - co2 - 1; setV(v, start - co, start - co); return; } // No change setV(v, start, end); return; } const dot = dotPosition(v); // console.log("c", c, "start", start, "end", end, "dot", dot, "dom", v, "v", v); if (c == "Delete") { const del = v.substring(start + 1, start); // console.log("del", del); if (del == ".") { // don't delete float point dot // No change setV(v, start, end); return; } if (start > dot) { // decimal part v = replace(v, start, "0"); setV(v, start + 1, end + 1); return; } if (del == ",") { const co1 = countComma(v, start + 1); v = remove(v, start + 1, 1); v = format(v); const co2 = countComma(v, start); const co = 1 - (co1 - co2); setV(v, start + co, end + co); return; } const co1 = countComma(v, start); v = remove(v, start, 1); v = format(v); const co2 = countComma(v, start - 1); const co = (co1 - co2); setV(v, start - co, end - co); return; } if (c == "Backspace") { if (dot + 1 == start) { // don't delete float point dot // No change setV(v, start - 1, end - 1); return; } if (start > dot) { // decimal part v = replace(v, start - 1, "0"); setV(v, start - 1, end - 1); return; } // real part const del = v.substring(start - 1, start); let cursorBack = 1; if (del == ",") { start--; end--; cursorBack = 2; } const co1 = countComma(v, start); v = remove(v, start - 1, 1); v = format(v); const co2 = countComma(v, start - 1); const co = cursorBack + (co1 - co2); setV(v, start - co, end - co); return; } // Input text ------------------ // console.log("c", c, "dot", dot, "start", start, "end", end, "dom", v, "v", v); if (c == ".") { // No change and Move cursor setV(v, dot + 1, dot + 1); refInput.current.setSelectionRange(dot + 1, dot + 1); return; } if (c == "-") { if (float(v) >= 0) { v = format("-" + v); setV(v, start + 1, end + 1); } else { // No change setV(v, start, end); } return; } if (c == "+") { if (float(v) < 0) { v = format(v.replace("-", "")); setV(v, start - 1, end - 1); } else { // No change setV(v, start, end); } return; } if (c == "0") { if (start > dot) { // decimal part v = replace(v, start, c); setV(v, start + 1, end + 1); return; } v = insert(v, start, c); setV(v, start + 1, end + 1); return; } if (c >= "1" && c <= "9") { if (start > dot) { // decimal part v = replace(v, start, c); setV(v, start + 1, end + 1); return; } // if real part is 0 if (parseInt(float(SaveValue.current)) == 0 && start <= dot) { // |0.?? or 0|.?? v = replace(v, dot - 1, c); setV(v, dot, dot); return; } if (start <= dot) { const c1 = countComma(v, start); v = insert(v, start, c); const c2 = countComma(v, start + 1); if (c2 > c1) { start++; end++; } setV(v, start + 1, end + 1); return; } } // No change setV(v, start, end); } // End of long long handleKeyDown // Select all text const handleFocus = () => { refInput.current.setSelectionRange(0, refInput.current.value.length); }; const handleChange = (event) => { // console.log("handleChange"); setValue({ value: SaveValue.current }); // Call props.onChange event.target.rawValue = float(SaveValue.current); event.target.value = format(SaveValue.current); props.onChange(event); }; // Render return e("input", { ref: refInput, id: props.id, className: props.className, style: props.style ? props.style : { textAlign: "right", imeMode: "disabled" }, value: value.value, onKeyDown: e => { handleKeyDown(e); }, onChange: e => { handleChange(e); }, onFocus: () => { handleFocus(); }, }); } export default InputFloat; |
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