Standardize financial chart colors and improve label placement

js/charts/ppmt_working_capital_days.js

@@ -1,18 +1,36 @@
 import { col } from '../csv.js';
 import {
-  PALETTE, FONT, axisCommon, periodAxis, titleStyle, legendStyle,
+  PALETTE, FINANCIAL_COLORS, FONT, axisCommon, periodAxis, titleStyle, legendStyle,
   lineSeries, footnote, watermarks, LAYOUT,
 } from '../theme.js';
 
 /** 泡泡玛特营运资本效率：存货、应收、应付与现金转换周期。 */
-export function workingCapitalDaysChart(rows, { width, height }) {
-  const series = [
-    { key: 'inventory_days', name: '存货周转天数', color: PALETTE.orange, width: 2.4 },
-    { key: 'receivable_days', name: '应收周转天数', color: PALETTE.blue, width: 2.2 },
-    { key: 'payable_days', name: '应付周转天数', color: PALETTE.purple, width: 2.2 },
-    { key: 'cash_conversion_cycle', name: '现金转换周期', color: PALETTE.red, width: 3.2 },
-  ];
+const SERIES = [
+  { key: 'inventory_days', name: '存货周转天数', color: FINANCIAL_COLORS.financingCashFlow, width: 2.4 },
+  { key: 'receivable_days', name: '应收周转天数', color: FINANCIAL_COLORS.investingCashFlow, width: 2.2 },
+  { key: 'payable_days', name: '应付周转天数', color: FINANCIAL_COLORS.cashConversion, width: 2.2 },
+  { key: 'cash_conversion_cycle', name: '现金转换周期', color: FINANCIAL_COLORS.netCashIncrease, width: 3.2 },
+];
 
+/**
+ * 同一期间的多条线将标签放到离最近相邻值更远的一侧，确保每个数值都可见。
+ */
+function labeledData(rows, key) {
+  return rows.map((row) => {
+    const value = row[key];
+    const ranked = SERIES.map((series) => row[series.key]).sort((a, b) => b - a);
+    const rank = ranked.indexOf(value);
+    const gapUp = rank > 0 ? ranked[rank - 1] - value : Infinity;
+    const gapDown = rank < ranked.length - 1 ? value - ranked[rank + 1] : Infinity;
+
+    return {
+      value,
+      label: { position: gapUp >= gapDown ? 'top' : 'bottom', distance: 9 },
+    };
+  });
+}
+
+export function workingCapitalDaysChart(rows, { width, height }) {
   return {
     backgroundColor: '#fff',
     title: {
@@ -20,7 +38,7 @@ export function workingCapitalDaysChart(rows, { width, height }) {
       text: '泡泡玛特营运资本效率',
       subtext: '现金转换周期 = 存货周转天数 + 应收周转天数 − 应付周转天数',
     },
-    legend: { ...legendStyle, top: LAYOUT.legendTop, data: series.map((item) => item.name) },
+    legend: { ...legendStyle, top: LAYOUT.legendTop, data: SERIES.map((item) => item.name) },
     grid: { left: 78, right: 42, top: LAYOUT.gridTop, bottom: 90 },
     tooltip: {
       trigger: 'axis',
@@ -37,17 +55,25 @@ export function workingCapitalDaysChart(rows, { width, height }) {
       nameTextStyle: { color: PALETTE.grey, fontSize: 13, fontFamily: FONT },
       min: 0,
     },
-    series: series.map((item) => ({
+    series: SERIES.map((item) => ({
       ...lineSeries({
         name: item.name,
-        data: col(rows, item.key),
+        data: labeledData(rows, item.key),
         color: item.color,
         formatter: (p) => p.value.toFixed(0),
         width: item.width,
       }),
-      label: item.key === 'cash_conversion_cycle'
-        ? { show: true, color: item.color, fontFamily: FONT, fontSize: 11, formatter: (p) => `${p.value.toFixed(0)}天` }
-        : { show: false },
+      label: {
+        show: true,
+        color: item.color,
+        fontFamily: FONT,
+        fontSize: 11,
+        fontWeight: 500,
+        formatter: (p) => `${p.value.toFixed(0)}天`,
+        textBorderColor: '#fff',
+        textBorderWidth: 3,
+      },
+      labelLayout: { hideOverlap: true },
       z: item.key === 'cash_conversion_cycle' ? 10 : 1,
     })),
     graphic: [