366 lines
12 KiB
JavaScript
366 lines
12 KiB
JavaScript
/* Pi-hole: A black hole for Internet advertisements
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* (c) 2023 Pi-hole, LLC (https://pi-hole.net)
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* Network-wide ad blocking via your own hardware.
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*
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* This file is copyright under the latest version of the EUPL.
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* Please see LICENSE file for your rights under this license. */
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/* global upstreams:false, i18n */
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"use strict";
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// eslint-disable-next-line no-unused-vars
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const THEME_COLORS = [
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"#f56954",
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"#3c8dbc",
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"#00a65a",
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"#00c0ef",
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"#f39c12",
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"#0073b7",
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"#001f3f",
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"#39cccc",
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"#3d9970",
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"#01ff70",
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"#ff851b",
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"#f012be",
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"#8e24aa",
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"#d81b60",
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"#222222",
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"#d2d6de",
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];
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// eslint-disable-next-line no-unused-vars
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const htmlLegendPlugin = {
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id: "htmlLegend",
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afterUpdate(chart, args, options) {
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const ul = getOrCreateLegendList(chart, options.containerID);
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// Use the built-in legendItems generator
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const items = chart.options.plugins.legend.labels.generateLabels(chart);
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// Exit early if the legend has the same items as last time
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if (
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options.lastLegendItems &&
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items.length === options.lastLegendItems.length &&
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items.every((item, i) => item.text === options.lastLegendItems[i].text) &&
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items.every((item, i) => item.hidden === options.lastLegendItems[i].hidden)
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) {
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return;
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}
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// else: Update the HTML legend if it is different from last time or if it
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// did not exist
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// Save the legend items so we can check against them next time to see if we
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// need to update the legend
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options.lastLegendItems = items;
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// Remove old legend items
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while (ul.firstChild) {
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ul.firstChild.remove();
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}
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for (const item of items) {
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const li = document.createElement("li");
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li.style.alignItems = "center";
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li.style.cursor = "pointer";
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li.style.display = "flex";
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li.style.flexDirection = "row";
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// Color checkbox (toggle visibility)
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const boxSpan = document.createElement("span");
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boxSpan.title = i18n.t("charts.toggle_visibility");
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boxSpan.style.color = item.fillStyle;
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boxSpan.style.display = "inline-block";
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boxSpan.style.margin = "0 10px";
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boxSpan.innerHTML = item.hidden
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? '<i class="colorBoxWrapper fa fa-square"></i>'
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: '<i class="colorBoxWrapper fa fa-check-square"></i>';
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boxSpan.addEventListener("click", () => {
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const { type } = chart.config;
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if (type === "pie" || type === "doughnut") {
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// Pie and doughnut charts only have a single dataset and visibility is per item
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chart.toggleDataVisibility(item.index);
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} else {
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chart.setDatasetVisibility(item.datasetIndex, !chart.isDatasetVisible(item.datasetIndex));
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}
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chart.update();
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});
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const textLink = document.createElement("p");
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if (
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chart.canvas.id === "queryTypePieChart" ||
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chart.canvas.id === "forwardDestinationPieChart"
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) {
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// Text (link to query log page)
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textLink.title = i18n.tf("charts.text_link_title", item.text);
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textLink.addEventListener("click", () => {
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if (chart.canvas.id === "queryTypePieChart") {
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globalThis.location.href = "queries?type=" + item.text + "&lang=" + i18n.lang;
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} else if (chart.canvas.id === "forwardDestinationPieChart") {
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// Encode the forward destination as it may contain an "#" character
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const upstream = encodeURIComponent(upstreams[item.text]);
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globalThis.location.href = "queries?upstream=" + upstream + "&lang=" + i18n.lang;
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}
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});
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}
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textLink.style.margin = 0;
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textLink.style.padding = 0;
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textLink.style.textDecoration = item.hidden ? "line-through" : "";
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textLink.className = "legend-label-text";
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textLink.textContent = item.text;
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li.append(boxSpan, textLink);
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ul.append(li);
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}
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},
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};
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// eslint-disable-next-line no-unused-vars
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const customTooltips = function (context) {
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const tooltip = context.tooltip;
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let tooltipEl = document.getElementById(this.chart.canvas.id + "-customTooltip");
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if (!tooltipEl) {
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// Create Tooltip Element once per chart
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tooltipEl = document.createElement("div");
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tooltipEl.id = this.chart.canvas.id + "-customTooltip";
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tooltipEl.classList.add("chartjs-tooltip");
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tooltipEl.innerHTML = "<div class='arrow'></div> <table></table>";
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// avoid browser's font-zoom since we know that <body>'s
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// font-size was set to 14px by bootstrap's css
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const fontZoom = Number.parseFloat($("body").css("font-size")) / 14;
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// set styles and font
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tooltipEl.style.padding = tooltip.options.padding + "px " + tooltip.options.padding + "px";
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tooltipEl.style.borderRadius = tooltip.options.cornerRadius + "px";
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tooltipEl.style.font = tooltip.options.bodyFont.string;
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tooltipEl.style.fontFamily = tooltip.options.bodyFont.family;
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tooltipEl.style.fontSize = tooltip.options.bodyFont.size / fontZoom + "px";
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tooltipEl.style.fontStyle = tooltip.options.bodyFont.style;
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// append Tooltip next to canvas-containing box
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tooltipEl.ancestor = this.chart.canvas.closest(".box[id]").parentNode;
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tooltipEl.ancestor.append(tooltipEl);
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}
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// Hide if no tooltip
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if (tooltip.opacity === 0) {
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tooltipEl.style.opacity = 0;
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return;
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}
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// Set caret position
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tooltipEl.classList.remove("left", "right", "center", "top", "bottom");
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tooltipEl.classList.add(tooltip.xAlign, tooltip.yAlign);
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// Set Text
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if (tooltip.body) {
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const titleLines = tooltip.title || [];
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const bodyLines = tooltip.body.map(bodyItem => bodyItem.lines);
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let innerHtml = "<thead>";
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for (const title of titleLines) {
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innerHtml += "<tr><th>" + title + "</th></tr>";
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}
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innerHtml += "</thead><tbody>";
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let printed = 0;
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const devicePixel = (1 / window.devicePixelRatio).toFixed(1);
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for (const [i, body] of bodyLines.entries()) {
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const labelColors = tooltip.labelColors[i];
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let style = "background-color: " + labelColors.backgroundColor;
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style += "; outline: 1px solid " + labelColors.backgroundColor;
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style += "; border: " + devicePixel + "px solid #fff";
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const span = "<span class='chartjs-tooltip-key' style='" + style + "'></span>";
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const num = body[0].split(": ");
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// do not display entries with value of 0 (in bar chart),
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// but pass through entries with "0.0% (in pie charts)
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if (num[1] !== "0") {
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innerHtml += "<tr><td>" + span + body + "</td></tr>";
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printed++;
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}
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}
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if (printed < 1) {
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innerHtml += `<tr><td>${i18n.t("charts.no_activity_recorded")}</td></tr>`;
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}
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innerHtml += "</tbody>";
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const tableRoot = tooltipEl.querySelector("table");
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tableRoot.innerHTML = innerHtml;
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}
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const canvasPos = this.chart.canvas.getBoundingClientRect();
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const boxPos = tooltipEl.ancestor.getBoundingClientRect();
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const offsetX = canvasPos.left - boxPos.left;
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const offsetY = canvasPos.top - boxPos.top;
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const tooltipWidth = tooltipEl.offsetWidth;
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const tooltipHeight = tooltipEl.offsetHeight;
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const caretX = tooltip.caretX;
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const caretY = tooltip.caretY;
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const caretPadding = tooltip.options.caretPadding;
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let tooltipX;
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let tooltipY;
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let arrowX;
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const arrowMinIndent = 2 * tooltip.options.cornerRadius;
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const arrowSize = 5;
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// Compute X position
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if ($(document).width() > 2 * tooltip.width || tooltip.xAlign !== "center") {
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// If the viewport is wide enough, let the tooltip follow the caret position
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tooltipX = offsetX + caretX;
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if (tooltip.yAlign === "top" || tooltip.yAlign === "bottom") {
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switch (tooltip.xAlign) {
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case "center": {
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// set a minimal X position to 5px to prevent
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// the tooltip to stick out left of the viewport
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const minX = 5;
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if (2 * tooltipX < tooltipWidth + minX) {
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arrowX = tooltipX - minX;
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tooltipX = minX;
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} else {
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tooltipX -= tooltipWidth / 2;
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}
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break;
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}
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case "left":
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tooltipX -= arrowMinIndent;
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arrowX = arrowMinIndent;
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break;
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case "right":
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tooltipX -= tooltipWidth - arrowMinIndent;
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arrowX = tooltipWidth - arrowMinIndent;
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break;
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default:
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break;
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}
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} else if (tooltip.yAlign === "center") {
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switch (tooltip.xAlign) {
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case "left":
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tooltipX += caretPadding;
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break;
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case "right":
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tooltipX -= tooltipWidth - caretPadding;
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break;
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case "center":
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tooltipX -= tooltipWidth / 2;
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break;
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default:
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break;
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}
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}
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} else {
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// compute the tooltip's center inside ancestor element
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tooltipX = (tooltipEl.ancestor.offsetWidth - tooltipWidth) / 2;
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// move the tooltip if the arrow would stick out to the left
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if (offsetX + caretX - arrowMinIndent < tooltipX) {
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tooltipX = offsetX + caretX - arrowMinIndent;
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}
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// move the tooltip if the arrow would stick out to the right
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if (offsetX + caretX - tooltipWidth + arrowMinIndent > tooltipX) {
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tooltipX = offsetX + caretX - tooltipWidth + arrowMinIndent;
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}
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arrowX = offsetX + caretX - tooltipX;
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}
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// Compute Y position
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switch (tooltip.yAlign) {
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case "top":
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tooltipY = offsetY + caretY + arrowSize + caretPadding;
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break;
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case "center":
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tooltipY = offsetY + caretY - tooltipHeight / 2;
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if (tooltip.xAlign === "left") {
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tooltipX += arrowSize;
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} else if (tooltip.xAlign === "right") {
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tooltipX -= arrowSize;
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}
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break;
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case "bottom":
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tooltipY = offsetY + caretY - tooltipHeight - arrowSize - caretPadding;
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break;
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default:
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break;
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}
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// Position tooltip and display
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tooltipEl.style.top = tooltipY.toFixed(1) + "px";
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tooltipEl.style.left = tooltipX.toFixed(1) + "px";
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if (arrowX === undefined) {
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tooltipEl.querySelector(".arrow").style.left = "";
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} else {
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// Calculate percentage X value depending on the tooltip's
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// width to avoid hanging arrow out on tooltip width changes
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const arrowXpercent = ((100 / tooltipWidth) * arrowX).toFixed(1);
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tooltipEl.querySelector(".arrow").style.left = arrowXpercent + "%";
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}
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tooltipEl.style.opacity = 1;
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};
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// eslint-disable-next-line no-unused-vars
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function doughnutTooltip(tooltipLabel) {
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let percentageTotalShown = tooltipLabel.chart._metasets[0].total.toFixed(1);
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// tooltipLabel.chart._metasets[0].total returns the total percentage of the shown slices
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// to compensate rounding errors we round to one decimal
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const label = " " + tooltipLabel.label;
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let itemPercentage;
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// if we only show < 1% percent of all, show each item with two decimals
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if (percentageTotalShown < 1) {
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itemPercentage = tooltipLabel.parsed.toFixed(2);
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} else {
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// show with one decimal, but in case the item share is really small it could be rounded to 0.0
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// we compensate for this
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itemPercentage =
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tooltipLabel.parsed.toFixed(1) === "0.0" ? "< 0.1" : tooltipLabel.parsed.toFixed(1);
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}
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// even if no doughnut slice is hidden, sometimes percentageTotalShown is slightly less then 100
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// we therefore use 99.9 to decide if slices are hidden (we only show with 0.1 precision)
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if (percentageTotalShown > 99.9) {
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// All items shown
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return label + ": " + itemPercentage + "%";
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}
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// set percentageTotalShown again without rounding to account
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// for cases where the total shown percentage would be <0.1% of all
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percentageTotalShown = tooltipLabel.chart._metasets[0].total;
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return i18n.tf(
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"charts.doughnut_tooltip",
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label,
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itemPercentage,
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((tooltipLabel.parsed * 100) / percentageTotalShown).toFixed(1)
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);
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}
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// chartjs plugin used by the custom doughnut legend
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const getOrCreateLegendList = (chart, id) => {
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const legendContainer = document.getElementById(id);
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let listContainer = legendContainer.querySelector("ul");
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if (!listContainer) {
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listContainer = document.createElement("ul");
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listContainer.style.display = "flex";
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listContainer.style.flexDirection = "column";
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listContainer.style.flexWrap = "wrap";
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listContainer.style.margin = 0;
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listContainer.style.padding = 0;
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legendContainer.append(listContainer);
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}
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return listContainer;
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};
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