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g1.html
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<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Canvas</title>
<link href="style.css" rel="stylesheet">
</head>
<body style="margin: 0; overflow: hidden;">
<canvas class="myCanvas">
<p>浏览器不支持canvas</p>
</canvas>
</body>
<script>
var canvas = document.querySelector(".myCanvas");
var width = (canvas.width = window.innerWidth);
var height = (canvas.height = window.innerHeight);
var ctx = canvas.getContext("2d");
let data = [
{
"name": "node-1",
"pods": [
{
"name": "chief-1",
"role": "chief"
},
{
"name": "worker-1",
"role": "worker"
},
{
"name": "worker-2",
"role": "worker"
},
{
"name": "ps-0",
"role": "ps",
"descs": [
{
"level": "info",
"text": "latency: 10ms"
},
{
"level": "warn",
"text": "memory: 10g"
},
{
"level": "error",
"text": "memory: 100g"
},
]
},
]
},
{
"name": "node-2",
"pods": [
{
"name": "ps-1",
"role": "ps"
},
{
"name": "ps-2",
"role": "ps"
},
]
},
{
"name": "node-3",
"pods": [
{
"name": "driver-1",
"role": "driver"
},
]
}
]
function filter_role(data, roles) {
filtered_nodes = []
data.forEach(node => {
filtered_pods = []
node.pods.forEach(pod => {
if (roles.includes(pod.role)) {
filtered_pods.push(pod)
}
})
filtered_nodes.push({
name: node.name,
pods: filtered_pods,
})
})
return filtered_nodes
}
// data = filter_role(data, ["chief", "worker", "driver"])
let max_node_pods = 0
data.forEach(node => {
if (node.pods.length > max_node_pods) {
max_node_pods = node.pods.length
}
});
const roleColorMap = {
'ps': '#FFD7C4',
'chief': '#7695FF',
'worker': '#9DBDFF',
'driver': '#FFC600',
'node': '#DFF2EB',
}
const descColorMap = {
"info": "green",
"warn": "yellow",
"error": "red",
}
descColorMap['warning'] = descColorMap['warn']
const n_node = data.length
const label_font = "sans-serif"
const label_size = 15
const node_x_padding_ratio = 0.1
const node_x_padding = width * node_x_padding_ratio
const node_y_padding_ratio = 0.05
const node_y_padding = height * node_y_padding_ratio
const node_width = (width - (n_node + 1) * node_x_padding) / n_node
const node_height = height - node_y_padding * 2
const node_pod_x_padding_ratio = 0.2
let node_pod_x_padding = node_width * node_pod_x_padding_ratio
let node_pod_y_padding = 10
// 根据宽度和高度，计算出最佳的pod大小
let pod_size = 0
const pod_size_1 = node_width - node_pod_x_padding * 2
const pod_size_2 = (node_height - node_pod_y_padding * (max_node_pods + 1)) / max_node_pods
if (pod_size_1 >= pod_size_2) {
pod_size = pod_size_2
// 重新计算node_pod_x_padding
node_pod_x_padding = (node_width - pod_size) / 2
}
else if (pod_size_1 < pod_size_2) {
pod_size = pod_size_1
// 重新计算node_pod_y_padding
node_pod_y_padding = (node_height - (pod_size * max_node_pods)) / (max_node_pods + 1)
}
// 有可能会相互覆盖/碰撞，但我们暂不考虑
data.forEach((node, i) => {
node_x = node_x_padding * (i + 1) + node_width * i
node_y = node_y_padding
// fill nodes
ctx.fillStyle = roleColorMap.node;
ctx.fillRect(node_x, node_y,
node_width, node_height);
ctx.fillStyle = "black";
ctx.font = `${label_size}px ${label_font}`;
ctx.fillText(node.name, node_x + 5, node_y + label_size);
// fill pods
node.pods.forEach((pod, j) => {
const pod_x = node_x + node_pod_x_padding
const pod_y = node_y + node_pod_y_padding * (j + 1) + pod_size * j
ctx.fillStyle = roleColorMap[pod.role];
ctx.fillRect(pod_x, pod_y,
pod_size, pod_size);
ctx.fillStyle = "black";
ctx.font = `${label_size}px ${label_font}`;
ctx.fillText(pod.name, pod_x + 5, pod_y + label_size);
pod.descs?.forEach((desc, i) => {
ctx.fillStyle = descColorMap[desc.level];
ctx.font = `${label_size}px ${label_font}`;
ctx.fillText(desc.text, pod_x + 5, pod_y + label_size * (2 + i) + 5);
})
})
})
</script>
</html>