dekun
242 lines
7.1 KiB
JavaScript
242 lines
7.1 KiB
JavaScript
/** 复盘四周期：按「包含成交时刻」的 K 线落点，避免偏到下一根 */
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(function () {
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var TF_MAX = { M1: 500, M5: 200, M15: 100, H1: 50 };
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var TF_SEC = { M1: 60, M5: 300, M15: 900, H1: 3600 };
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function num(v) {
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if (v == null || v === "") return null;
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var n = Number(v);
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return Number.isFinite(n) ? n : null;
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}
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/** 找到覆盖 ts 的那根 K 线：barOpen <= ts < barOpen+period（最后一根含右边界） */
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function barIndexAt(bars, ts, tf) {
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if (ts == null || !bars.length) return -1;
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var period = TF_SEC[tf] || 60;
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var t = Number(ts);
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var i;
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for (i = 0; i < bars.length; i++) {
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var open = Number(bars[i].ts);
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var end = open + period;
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var last = i === bars.length - 1;
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if (t >= open && (t < end || (last && t <= end))) {
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return i;
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}
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}
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// 落在首根之前 / 末根之后：夹到边界
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if (t < Number(bars[0].ts)) return 0;
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return bars.length - 1;
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}
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function cropBars(bars, markers, tf) {
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if (!bars.length) return bars;
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var maxN = TF_MAX[tf] || 100;
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if (bars.length <= maxN) return bars;
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var a = barIndexAt(bars, markers.openTs, tf);
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var b =
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markers.closeTs != null ? barIndexAt(bars, markers.closeTs, tf) : a;
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if (a < 0) a = Math.floor(bars.length / 2);
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if (b < 0) b = a;
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var lo = Math.min(a, b);
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var hi = Math.max(a, b);
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var span = hi - lo + 1;
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var pad = Math.max(4, Math.floor((maxN - span) / 2));
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var start = Math.max(0, lo - pad);
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var end = Math.min(bars.length, start + maxN);
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start = Math.max(0, end - maxN);
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return bars.slice(start, end);
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}
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function fmtBjt(ts) {
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if (ts == null) return "";
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var d = new Date(Number(ts) * 1000);
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// 用 UTC+8 显示，与复盘页北京时间一致
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var utc = d.getTime() + d.getTimezoneOffset() * 60000;
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var bjt = new Date(utc + 8 * 3600000);
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var hh = String(bjt.getHours()).padStart(2, "0");
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var mm = String(bjt.getMinutes()).padStart(2, "0");
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return hh + ":" + mm;
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}
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function drawCandleChart(canvas, bars, markers, tf) {
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if (!canvas || !bars || !bars.length) return;
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bars = cropBars(bars, markers || {}, tf);
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markers = markers || {};
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var dpr = window.devicePixelRatio || 1;
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var cssW = canvas.clientWidth || 400;
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var cssH = canvas.clientHeight || 220;
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canvas.width = cssW * dpr;
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canvas.height = cssH * dpr;
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var ctx = canvas.getContext("2d");
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ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
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var padL = 4;
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var padR = 4;
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var padT = 4;
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var padB = 16; // 底部时间轴
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var min = Infinity;
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var max = -Infinity;
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bars.forEach(function (b) {
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min = Math.min(min, b.low);
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max = Math.max(max, b.high);
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});
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if (markers.openPrice != null) {
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min = Math.min(min, markers.openPrice);
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max = Math.max(max, markers.openPrice);
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}
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if (markers.closePrice != null) {
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min = Math.min(min, markers.closePrice);
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max = Math.max(max, markers.closePrice);
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}
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if (!(max > min)) max = min + 1;
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var padPrice = (max - min) * 0.06 || 0.5;
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min -= padPrice;
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max += padPrice;
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var w = cssW - padL - padR;
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var h = cssH - padT - padB;
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var n = bars.length;
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var slot = w / n;
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ctx.clearRect(0, 0, cssW, cssH);
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ctx.fillStyle = "#0e0e18";
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ctx.fillRect(0, 0, cssW, cssH);
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var yOf = function (p) {
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return padT + ((max - p) / (max - min)) * h;
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};
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var xOf = function (i) {
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return padL + i * slot + slot * 0.5;
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};
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var bodyW = Math.max(1, Math.min(6, slot * 0.6));
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bars.forEach(function (b, i) {
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var x = xOf(i);
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var up = b.close >= b.open;
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ctx.strokeStyle = up ? "#0ecb81" : "#f6465d";
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ctx.fillStyle = ctx.strokeStyle;
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ctx.lineWidth = 1;
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ctx.beginPath();
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ctx.moveTo(x, yOf(b.high));
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ctx.lineTo(x, yOf(b.low));
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ctx.stroke();
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var y1 = yOf(b.open);
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var y2 = yOf(b.close);
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var top = Math.min(y1, y2);
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var bh = Math.max(1, Math.abs(y2 - y1));
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ctx.fillRect(x - bodyW / 2, top, bodyW, bh);
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});
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// 底部左右时间（北京时间），方便对照成交时刻
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ctx.fillStyle = "#888899";
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ctx.font = "10px Microsoft YaHei UI, sans-serif";
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ctx.textBaseline = "top";
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ctx.textAlign = "left";
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ctx.fillText(fmtBjt(bars[0].ts), padL, cssH - padB + 2);
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ctx.textAlign = "right";
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ctx.fillText(fmtBjt(bars[n - 1].ts), cssW - padR, cssH - padB + 2);
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var entryColor = "#4cc2ff";
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var exitColor = "#f0b429";
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var entryIdx = barIndexAt(bars, markers.openTs, tf);
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var exitIdx =
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markers.closeTs != null ? barIndexAt(bars, markers.closeTs, tf) : -1;
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var hasExit =
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markers.closeTs != null &&
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markers.closePrice != null &&
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exitIdx >= 0;
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function drawDot(i, price, color) {
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if (i < 0 || price == null) return { x: 0, y: 0 };
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var x = xOf(i);
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var y = yOf(price);
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ctx.beginPath();
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ctx.arc(x, y, 4.5, 0, Math.PI * 2);
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ctx.fillStyle = color;
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ctx.fill();
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ctx.lineWidth = 1.5;
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ctx.strokeStyle = "#ffffff";
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ctx.stroke();
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return { x: x, y: y };
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}
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var pe = null;
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var px = null;
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if (entryIdx >= 0 && markers.openPrice != null) {
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pe = drawDot(entryIdx, markers.openPrice, entryColor);
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}
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if (hasExit) {
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if (Math.abs(exitIdx - entryIdx) <= 1) {
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var x = xOf(exitIdx) + Math.max(6, slot * 0.8);
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var y = yOf(markers.closePrice);
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if (pe && Math.abs(y - pe.y) < 6) {
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y = pe.y - 8;
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}
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ctx.beginPath();
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ctx.arc(x, y, 4.5, 0, Math.PI * 2);
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ctx.fillStyle = exitColor;
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ctx.fill();
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ctx.lineWidth = 1.5;
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ctx.strokeStyle = "#ffffff";
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ctx.stroke();
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px = { x: x, y: y };
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} else {
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px = drawDot(exitIdx, markers.closePrice, exitColor);
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}
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}
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ctx.font = "bold 10px Microsoft YaHei UI, sans-serif";
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if (pe) {
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ctx.fillStyle = entryColor;
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ctx.textAlign = "center";
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ctx.textBaseline = "bottom";
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ctx.fillText("入", pe.x, pe.y - 6);
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}
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if (px) {
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ctx.fillStyle = exitColor;
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ctx.textAlign = "center";
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ctx.textBaseline = "bottom";
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ctx.fillText("出", px.x, px.y - 6);
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}
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var meta = canvas.parentElement && canvas.parentElement.querySelector(".chart-meta");
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if (meta) {
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meta.textContent =
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bars.length +
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" 根 · " +
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fmtBjt(bars[0].ts) +
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"–" +
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fmtBjt(bars[n - 1].ts) +
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" 北京时间";
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}
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}
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function readMarkers(el) {
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return {
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openTs: num(el.dataset.openTs),
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closeTs: num(el.dataset.closeTs),
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openPrice: num(el.dataset.openPrice),
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closePrice: num(el.dataset.closePrice),
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side: el.dataset.side || "",
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};
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}
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function paintAll() {
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document.querySelectorAll("canvas.chart-canvas").forEach(function (el) {
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try {
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var bars = JSON.parse(el.dataset.bars || "[]");
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var tf = el.dataset.tf || "M1";
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drawCandleChart(el, bars, readMarkers(el), tf);
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} catch (e) {
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console.warn(e);
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}
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});
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}
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paintAll();
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window.addEventListener("resize", paintAll);
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})();
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