release-2.1: ui: add bar chart for node list memory & capacity

pkg/ui/src/views/cluster/containers/nodesOverview/barChart.tsx

@@ -0,0 +1,109 @@
+import d3 from "d3";
+import React from "react";
+
+import { Bytes, Percentage } from "src/util/format";
+
+interface BytesBarChartProps {
+  used: number;
+  usable: number;
+}
+
+const width = 175;
+const height = 28;
+
+const chartHeight = 14;
+
+export class BytesBarChart extends React.Component<BytesBarChartProps> {
+  chart: React.RefObject<HTMLDivElement> = React.createRef();
+
+  componentDidMount() {
+    this.renderChart(this.props);
+  }
+
+  shouldComponentUpdate(props: BytesBarChartProps) {
+    this.renderChart(props);
+    return false;
+  }
+
+  renderChart(props: BytesBarChartProps) {
+    const svg = d3.select(this.chart.current)
+      .selectAll("svg")
+      .data([{ width, height }]);
+
+    const svgEnter = svg
+      .enter()
+      .append("svg")
+      .attr("width", d => d.width)
+      .attr("height", d => d.height);
+
+    svgEnter.append("text")
+      .attr("y", chartHeight - 4)
+      .attr("class", "bar-chart__label percent");
+
+    const label = svg.select(".bar-chart__label.percent")
+      .text("100%");
+
+    const textNode = label.node();
+    const reserveWidth = !textNode ? 100 : (textNode as SVGSVGElement).getBBox().width;
+
+    svg.selectAll(".bar-chart__label.percent")
+      .text(Percentage(props.used, props.usable));
+
+    const labelWidth = !textNode ? 100 : (textNode as SVGSVGElement).getBBox().width;
+
+    label.attr("x", reserveWidth - labelWidth);
+
+    const spacing = 3;
+
+    const chartEnter = svgEnter.append("g")
+      .attr("class", "bar-chart__bars")
+      .attr("transform", `translate(${reserveWidth + spacing},0)`);
+
+    const chart = svg.selectAll(".bar-chart__bars");
+
+    const chartWidth = width - reserveWidth - spacing;
+
+    chartEnter.append("rect")
+      .attr("width", chartWidth * 0.9)
+      .attr("height", chartHeight)
+      .attr("fill", "#e2e5ee");
+
+    chartEnter.append("rect")
+      .attr("x", chartWidth * 0.9)
+      .attr("width", chartWidth * 0.1)
+      .attr("height", chartHeight)
+      .attr("fill", "#cfd2dc");
+
+    chartEnter.append("rect")
+      .attr("class", "bar-chart__bar used")
+      .attr("height", 5) // This attr's for FF, the CSS rule is for Chrome.
+      .attr("y", (chartHeight - 5) / 2)
+      .attr("fill", "#3a7de1");
+
+    chart.selectAll(".bar-chart__bar.used")
+      .attr("width", chartWidth * props.used / props.usable);
+
+    chartEnter.append("text")
+      .attr("y", height)
+      .attr("class", "bar-chart__label used");
+
+    chart.selectAll(".bar-chart__label.used")
+      .text(Bytes(props.used));
+
+    chartEnter.append("text")
+      .attr("y", height)
+      .attr("class", "bar-chart__label total");
+
+    const total = chart.selectAll(".bar-chart__label.total")
+      .text(Bytes(props.usable));
+
+    const totalNode = total.node();
+    const totalWidth = !totalNode ? 100 : (totalNode as SVGSVGElement).getBBox().width;
+
+    total.attr("x", chartWidth - totalWidth - 0);
+  }
+
+  render() {
+    return <div ref={this.chart} />;
+  }
+}