snapshot of https://github.com/go-gitea/gitea.git (main, 2026-09-15; blobs > 131072B omitted)

web_src/js/components/ChartCanvas.vue

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+<script lang="ts" setup>
+import {onMounted, onUnmounted, toRaw, useTemplateRef, watch, type ShallowRef} from 'vue';
+import {_adapters, BarController, Chart, LinearScale, LineController, TimeScale, type ChartData, type ChartOptions, type TimeUnit} from 'chart.js';
+import {chartJsColors} from '../utils/color.ts';
+import dayjs from 'dayjs';
+import advancedFormat from 'dayjs/plugin/advancedFormat.js';
+import quarterOfYear from 'dayjs/plugin/quarterOfYear.js';
+import type {ConfigType, ManipulateType} from 'dayjs';
+
+dayjs.extend(advancedFormat); // the quarter format needs the `Q` token
+dayjs.extend(quarterOfYear);
+
+Chart.defaults.color = chartJsColors.text;
+Chart.defaults.borderColor = chartJsColors.border;
+Chart.register(BarController, LineController, LinearScale, TimeScale);
+
+// minimal port of chartjs-adapter-dayjs-4, MIT license, Copyright (c) 2022 bolstycjw
+_adapters._date.override({
+  formats: () => ({
+    datetime: 'MMM D, YYYY, h:mm:ss a',
+    millisecond: 'h:mm:ss.SSS a',
+    second: 'h:mm:ss a',
+    minute: 'h:mm a',
+    hour: 'hA',
+    day: 'MMM D',
+    week: 'MMM D, YYYY',
+    month: 'MMM YYYY',
+    quarter: '[Q]Q - YYYY',
+    year: 'YYYY',
+  }),
+  parse: (value: ConfigType) => {
+    const date = dayjs(value);
+    return date.isValid() ? date.valueOf() : null;
+  },
+  format: (time: number, format: string) => dayjs(time).format(format),
+  add: (time: number, amount: number, unit: TimeUnit) => dayjs(time).add(amount, unit as ManipulateType).valueOf(), // the quarter plugin widens this at runtime
+  diff: (max: number, min: number, unit: TimeUnit) => dayjs(max).diff(min, unit),
+  // chart.js only asks for `isoWeek` when `time.isoWeekday` is set, which we never do
+  startOf: (time: number, unit: TimeUnit) => dayjs(time).startOf(unit).valueOf(),
+  endOf: (time: number, unit: TimeUnit) => dayjs(time).endOf(unit).valueOf(),
+});
+
+const props = defineProps<{
+  type: 'bar' | 'line',
+  data: ChartData,
+  options: ChartOptions,
+}>();
+
+const elCanvas = useTemplateRef('elCanvas') as Readonly<ShallowRef<HTMLCanvasElement>>;
+let chart: Chart | undefined;
+
+// chart.js mutates what it gets, so it must never see a reactive proxy
+onMounted(() => {
+  chart = new Chart(elCanvas.value, {type: props.type, data: toRaw(props.data), options: toRaw(props.options)});
+});
+
+onUnmounted(() => {
+  chart?.destroy();
+});
+
+watch([() => props.data, () => props.options], ([data, options]) => {
+  if (!chart) return; // chart creation failed
+  chart.data = toRaw(data);
+  chart.options = toRaw(options);
+  chart.update();
+});
+</script>
+
+<template>
+  <canvas ref="elCanvas" role="img"/>
+</template>