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-rw-r--r--src/zen/frontend/html/api.js8
-rw-r--r--src/zen/frontend/html/counters.js404
-rw-r--r--src/zen/frontend/html/csvstats.js5
-rw-r--r--src/zen/frontend/html/index.html24
-rw-r--r--src/zen/frontend/html/logs.js11
-rw-r--r--src/zen/frontend/html/memory.js73
-rw-r--r--src/zen/frontend/html/timeline.js170
-rw-r--r--src/zen/frontend/html/trace.css73
-rw-r--r--src/zen/frontend/html/trace.js40
-rw-r--r--src/zen/frontend/html/util.js16
10 files changed, 704 insertions, 120 deletions
diff --git a/src/zen/frontend/html/api.js b/src/zen/frontend/html/api.js
index fbe5304ca..86831220e 100644
--- a/src/zen/frontend/html/api.js
+++ b/src/zen/frontend/html/api.js
@@ -107,6 +107,14 @@ export function getCsvMetadata() {
return getJson("csv-metadata");
}
+export function getCounters() {
+ return getJson("counters");
+}
+
+export function getCounterSeries(id) {
+ return getJson(`counter-series?id=${encodeURIComponent(id)}`);
+}
+
export function getAllocSummary() {
return getJson("alloc-summary");
}
diff --git a/src/zen/frontend/html/counters.js b/src/zen/frontend/html/counters.js
new file mode 100644
index 000000000..fe3e4d338
--- /dev/null
+++ b/src/zen/frontend/html/counters.js
@@ -0,0 +1,404 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+// Counters viewer — list registered TRACE_INT_VALUE / TRACE_FLOAT_VALUE
+// counters and chart selected ones.
+//
+// Mirrors csvstats.js layout (tree on the left, line chart on the right),
+// adapted to the simpler counter-id keyed series model.
+
+import { getCounters, getCounterSeries } from "./api.js";
+import { escapeHtml } from "./util.js";
+
+function formatTime(us) {
+ if (us < 1000) return `${us} µs`;
+ if (us < 1_000_000) return `${(us / 1000).toFixed(2)} ms`;
+ return `${(us / 1_000_000).toFixed(2)} s`;
+}
+
+const BYTE_UNITS = ["B", "KiB", "MiB", "GiB", "TiB"];
+function formatBytes(value) {
+ let v = value;
+ let i = 0;
+ while (Math.abs(v) >= 1024 && i + 1 < BYTE_UNITS.length) {
+ v /= 1024;
+ ++i;
+ }
+ return `${v.toFixed(i === 0 ? 0 : 2)} ${BYTE_UNITS[i]}`;
+}
+
+function formatCounterValue(value, def) {
+ if (def && def.display_hint === 1) {
+ return formatBytes(value);
+ }
+ if (def && def.type === 0) {
+ // Integer — render without fractional digits.
+ return Number(value).toLocaleString();
+ }
+ return value.toFixed(3);
+}
+
+const LINE_COLORS = [
+ "#4fc3f7", "#81c784", "#ffb74d", "#e57373", "#ba68c8",
+ "#4db6ac", "#fff176", "#f06292", "#7986cb", "#a1887f",
+];
+
+export class CountersView {
+ constructor(model, containerEl) {
+ this.model = model;
+ this.container = containerEl;
+ this.loaded = false;
+ this.defs = [];
+ this.defById = new Map();
+
+ this.selected = new Set();
+ this.seriesData = new Map();
+ this.colorIndex = 0;
+ this.colorById = new Map();
+
+ this.viewStartUs = 0;
+ this.viewEndUs = (model.session && model.session.trace_end_us) || 1;
+
+ this.buildLayout();
+ }
+
+ buildLayout() {
+ this.container.innerHTML =
+ `<div class="csv-layout">` +
+ `<div class="csv-tree-panel">` +
+ `<div class="sidebar-label">Counters</div>` +
+ `<div class="csv-tree counters-tree"></div>` +
+ `</div>` +
+ `<div class="csv-chart-panel">` +
+ `<canvas class="csv-chart-canvas"></canvas>` +
+ `<div class="csv-chart-tooltip" hidden></div>` +
+ `</div>` +
+ `</div>`;
+
+ this.treeEl = this.container.querySelector(".counters-tree");
+ this.canvas = this.container.querySelector(".csv-chart-canvas");
+ this.tooltipEl = this.container.querySelector(".csv-chart-tooltip");
+ this.ctx = this.canvas.getContext("2d");
+ this.dpr = Math.max(1, window.devicePixelRatio || 1);
+
+ this.resizeObserver = new ResizeObserver(() => this.drawChart());
+ this.resizeObserver.observe(this.canvas);
+ this.canvas.addEventListener("mousemove", (e) => this.onChartHover(e));
+ this.canvas.addEventListener("mouseleave", () => { this.tooltipEl.hidden = true; });
+
+ this.panning = false;
+ this.canvas.addEventListener("mousedown", (e) => this.onPanStart(e));
+ window.addEventListener("mousemove", (e) => this.onPanMove(e));
+ window.addEventListener("mouseup", () => this.onPanEnd());
+ this.canvas.addEventListener("wheel", (e) => this.onWheel(e), { passive: false });
+ }
+
+ async ensureLoaded() {
+ if (this.loaded) {
+ this.drawChart();
+ return;
+ }
+ try {
+ this.defs = await getCounters();
+ for (const d of this.defs) {
+ this.defById.set(d.id, d);
+ }
+ this.renderTree();
+ } catch (e) {
+ this.treeEl.innerHTML = `<div class="csv-empty">Failed to load counters: ${escapeHtml(e.message)}</div>`;
+ console.error(e);
+ }
+ this.loaded = true;
+ this.drawChart();
+ }
+
+ renderTree() {
+ // Group by leading path component (everything before the first "/").
+ const groups = new Map();
+ for (const d of this.defs) {
+ if (!d.sample_count) continue;
+ const slash = d.name.indexOf("/");
+ const group = slash > 0 ? d.name.substring(0, slash) : "";
+ if (!groups.has(group)) groups.set(group, []);
+ groups.get(group).push(d);
+ }
+
+ if (groups.size === 0) {
+ this.treeEl.innerHTML = `<div class="csv-empty">No counters in this trace.</div>`;
+ return;
+ }
+
+ const groupNames = Array.from(groups.keys()).sort((a, b) => a.localeCompare(b));
+ const parts = [];
+ for (const g of groupNames) {
+ const list = groups.get(g);
+ parts.push(`<div class="csv-cat-header">${escapeHtml(g || "(ungrouped)")}</div>`);
+ for (const d of list) {
+ parts.push(
+ `<label class="csv-stat-row">` +
+ `<input type="checkbox" data-counter-id="${d.id}">` +
+ `<span class="csv-stat-name"></span>` +
+ `<span class="thread-count">${Number(d.sample_count).toLocaleString()}</span>` +
+ `</label>`
+ );
+ }
+ }
+ this.treeEl.innerHTML = parts.join("");
+
+ // Set names via DOM (XSS safe).
+ const rows = this.treeEl.querySelectorAll(".csv-stat-row");
+ let idx = 0;
+ for (const g of groupNames) {
+ for (const d of groups.get(g)) {
+ if (idx < rows.length) {
+ const slash = d.name.indexOf("/");
+ const display = slash > 0 ? d.name.substring(slash + 1) : d.name;
+ rows[idx].querySelector(".csv-stat-name").textContent = display;
+ rows[idx].title = d.name;
+ }
+ ++idx;
+ }
+ }
+
+ // Wire checkboxes.
+ for (const cb of this.treeEl.querySelectorAll("input[type=checkbox]")) {
+ cb.addEventListener("change", () => {
+ const id = Number(cb.dataset.counterId);
+ if (cb.checked) {
+ this.selected.add(id);
+ if (!this.colorById.has(id)) {
+ this.colorById.set(id, LINE_COLORS[this.colorIndex++ % LINE_COLORS.length]);
+ }
+ this.fetchSeries(id);
+ } else {
+ this.selected.delete(id);
+ this.drawChart();
+ }
+ });
+ }
+ }
+
+ async fetchSeries(id) {
+ if (this.seriesData.has(id)) {
+ this.drawChart();
+ return;
+ }
+ try {
+ const result = await getCounterSeries(id);
+ const samples = (result.samples || []).map(([t, v]) => ({ timeUs: t, value: v }));
+ this.seriesData.set(id, samples);
+ this.drawChart();
+ } catch (e) {
+ console.error(`Failed to fetch counter series for ${id}: ${e.message}`);
+ }
+ }
+
+ resizeCanvas() {
+ const rect = this.canvas.getBoundingClientRect();
+ this.width = Math.floor(rect.width);
+ this.height = Math.floor(rect.height);
+ const bw = Math.floor(rect.width * this.dpr);
+ const bh = Math.floor(rect.height * this.dpr);
+ if (this.canvas.width !== bw || this.canvas.height !== bh) {
+ this.canvas.width = bw;
+ this.canvas.height = bh;
+ }
+ this.ctx.setTransform(this.dpr, 0, 0, this.dpr, 0, 0);
+ }
+
+ drawChart() {
+ this.resizeCanvas();
+ const ctx = this.ctx;
+ const W = this.width;
+ const H = this.height;
+
+ const bg = getComputedStyle(document.body).getPropertyValue("--bg0") || "#0d1117";
+ const fg2 = getComputedStyle(document.body).getPropertyValue("--fg2") || "#8b949e";
+ const border = getComputedStyle(document.body).getPropertyValue("--border") || "#30363d";
+ ctx.fillStyle = bg;
+ ctx.fillRect(0, 0, W, H);
+
+ if (this.selected.size === 0) {
+ ctx.fillStyle = fg2;
+ ctx.font = "12px -apple-system, Segoe UI, sans-serif";
+ ctx.textAlign = "center";
+ ctx.textBaseline = "middle";
+ ctx.fillText("Select counters from the tree to chart them", W / 2, H / 2);
+ return;
+ }
+
+ const PAD_L = 70, PAD_R = 12, PAD_T = 12, PAD_B = 28;
+ const chartW = W - PAD_L - PAD_R;
+ const chartH = H - PAD_T - PAD_B;
+ if (chartW <= 0 || chartH <= 0) return;
+
+ const startUs = this.viewStartUs;
+ const endUs = this.viewEndUs;
+ const rangeUs = Math.max(1, endUs - startUs);
+
+ let minVal = Infinity, maxVal = -Infinity;
+ for (const id of this.selected) {
+ const samples = this.seriesData.get(id);
+ if (!samples) continue;
+ for (const s of samples) {
+ if (s.timeUs < startUs || s.timeUs > endUs) continue;
+ if (s.value < minVal) minVal = s.value;
+ if (s.value > maxVal) maxVal = s.value;
+ }
+ }
+ if (!isFinite(minVal)) { minVal = 0; maxVal = 1; }
+ if (minVal === maxVal) { minVal -= 0.5; maxVal += 0.5; }
+ const valRange = maxVal - minVal;
+ const valPad = valRange * 0.05;
+ minVal -= valPad;
+ maxVal += valPad;
+
+ const xAt = (us) => PAD_L + (us - startUs) / rangeUs * chartW;
+ const yAt = (v) => PAD_T + (1 - (v - minVal) / (maxVal - minVal)) * chartH;
+
+ ctx.strokeStyle = border;
+ ctx.lineWidth = 0.5;
+ for (let i = 0; i <= 4; i++) {
+ const y = PAD_T + chartH * i / 4;
+ ctx.beginPath(); ctx.moveTo(PAD_L, y); ctx.lineTo(PAD_L + chartW, y); ctx.stroke();
+ }
+
+ // Format Y-axis labels using the display hint of the first selected counter.
+ const firstSelected = this.selected.values().next().value;
+ const firstDef = this.defById.get(firstSelected);
+
+ ctx.fillStyle = fg2;
+ ctx.font = "10px -apple-system, Segoe UI, sans-serif";
+ ctx.textAlign = "right";
+ ctx.textBaseline = "middle";
+ for (let i = 0; i <= 4; i++) {
+ const v = minVal + (maxVal - minVal) * (1 - i / 4);
+ const y = PAD_T + chartH * i / 4;
+ ctx.fillText(formatCounterValue(v, firstDef), PAD_L - 4, y);
+ }
+
+ ctx.textAlign = "center";
+ ctx.textBaseline = "top";
+ const tickCount = Math.max(2, Math.min(8, Math.floor(chartW / 80)));
+ for (let i = 0; i <= tickCount; i++) {
+ const us = startUs + rangeUs * i / tickCount;
+ const x = xAt(us);
+ ctx.fillText(formatTime(us), x, PAD_T + chartH + 4);
+ }
+
+ // Draw step-style lines (counters change at discrete events).
+ for (const id of this.selected) {
+ const samples = this.seriesData.get(id);
+ if (!samples || samples.length === 0) continue;
+ const color = this.colorById.get(id) || "#fff";
+
+ ctx.strokeStyle = color;
+ ctx.lineWidth = 1.5;
+ ctx.beginPath();
+ let started = false;
+ let prevY = 0;
+ for (const s of samples) {
+ if (s.timeUs < startUs || s.timeUs > endUs) continue;
+ const x = xAt(s.timeUs);
+ const y = yAt(s.value);
+ if (!started) { ctx.moveTo(x, y); started = true; }
+ else { ctx.lineTo(x, prevY); ctx.lineTo(x, y); }
+ prevY = y;
+ }
+ ctx.stroke();
+ }
+
+ ctx.strokeStyle = border;
+ ctx.lineWidth = 1;
+ ctx.strokeRect(PAD_L, PAD_T, chartW, chartH);
+
+ ctx.font = "10px -apple-system, Segoe UI, sans-serif";
+ ctx.textAlign = "left";
+ ctx.textBaseline = "top";
+ let legendX = PAD_L + 6;
+ for (const id of this.selected) {
+ const def = this.defById.get(id);
+ const name = def ? def.name : `counter ${id}`;
+ const color = this.colorById.get(id) || "#fff";
+ ctx.fillStyle = color;
+ ctx.fillRect(legendX, PAD_T + 4, 10, 10);
+ ctx.fillStyle = "#ccc";
+ ctx.fillText(name, legendX + 14, PAD_T + 4);
+ legendX += ctx.measureText(name).width + 24;
+ }
+
+ this._chartLayout = { PAD_L, PAD_R, PAD_T, PAD_B, chartW, chartH, startUs, endUs, rangeUs, minVal, maxVal, xAt, yAt, firstDef };
+ }
+
+ onChartHover(e) {
+ if (!this._chartLayout || this.selected.size === 0) {
+ this.tooltipEl.hidden = true;
+ return;
+ }
+ const rect = this.canvas.getBoundingClientRect();
+ const mx = e.clientX - rect.left;
+ const my = e.clientY - rect.top;
+ const { PAD_L, PAD_T, chartW, chartH, startUs, rangeUs } = this._chartLayout;
+
+ if (mx < PAD_L || mx > PAD_L + chartW || my < PAD_T || my > PAD_T + chartH) {
+ this.tooltipEl.hidden = true;
+ return;
+ }
+
+ const cursorUs = startUs + (mx - PAD_L) / chartW * rangeUs;
+ const lines = [];
+ for (const id of this.selected) {
+ const samples = this.seriesData.get(id);
+ if (!samples || samples.length === 0) continue;
+ let best = null, bestDist = Infinity;
+ for (const s of samples) {
+ const d = Math.abs(s.timeUs - cursorUs);
+ if (d < bestDist) { bestDist = d; best = s; }
+ }
+ if (best) {
+ const def = this.defById.get(id);
+ const name = def ? def.name : `counter ${id}`;
+ const color = this.colorById.get(id) || "#fff";
+ lines.push(`<span style="color:${color}">${escapeHtml(name)}</span>: ${formatCounterValue(best.value, def)}`);
+ }
+ }
+ if (lines.length === 0) { this.tooltipEl.hidden = true; return; }
+ this.tooltipEl.innerHTML = `<div style="margin-bottom:2px">${formatTime(cursorUs)}</div>` + lines.join("<br>");
+ this.tooltipEl.style.left = `${mx + 12}px`;
+ this.tooltipEl.style.top = `${my + 12}px`;
+ this.tooltipEl.hidden = false;
+ }
+
+ onPanStart(e) {
+ if (e.button !== 0) return;
+ this.panning = true;
+ this.panStartX = e.clientX;
+ this.panStartViewStart = this.viewStartUs;
+ this.panStartViewEnd = this.viewEndUs;
+ }
+
+ onPanMove(e) {
+ if (!this.panning || !this._chartLayout) return;
+ const dx = e.clientX - this.panStartX;
+ const usPerPx = (this.panStartViewEnd - this.panStartViewStart) / this._chartLayout.chartW;
+ const shift = -dx * usPerPx;
+ this.viewStartUs = this.panStartViewStart + shift;
+ this.viewEndUs = this.panStartViewEnd + shift;
+ this.drawChart();
+ }
+
+ onPanEnd() { this.panning = false; }
+
+ onWheel(e) {
+ e.preventDefault();
+ if (!this._chartLayout) return;
+ const rect = this.canvas.getBoundingClientRect();
+ const mx = e.clientX - rect.left;
+ const { PAD_L, chartW, startUs, rangeUs } = this._chartLayout;
+ const cursorUs = startUs + (mx - PAD_L) / chartW * rangeUs;
+ const factor = e.deltaY > 0 ? 1.25 : 0.8;
+ const newRange = Math.max(10, (this.viewEndUs - this.viewStartUs) * factor);
+ const ratio = (mx - PAD_L) / chartW;
+ this.viewStartUs = cursorUs - ratio * newRange;
+ this.viewEndUs = this.viewStartUs + newRange;
+ this.drawChart();
+ }
+}
diff --git a/src/zen/frontend/html/csvstats.js b/src/zen/frontend/html/csvstats.js
index a50b2f068..fc006acdc 100644
--- a/src/zen/frontend/html/csvstats.js
+++ b/src/zen/frontend/html/csvstats.js
@@ -2,10 +2,7 @@
// CSV Profiler stats viewer — category/stat tree with line-chart visualization.
import { getCsvSeries } from "./api.js";
-
-function escapeHtml(s) {
- return String(s).replace(/[&<>"']/g, (c) => ({"&":"&amp;","<":"&lt;",">":"&gt;","\"":"&quot;","'":"&#39;"}[c]));
-}
+import { escapeHtml } from "./util.js";
function formatTime(us) {
if (us < 1000) return `${us} \u00b5s`;
diff --git a/src/zen/frontend/html/index.html b/src/zen/frontend/html/index.html
index 5853a80dc..924abadda 100644
--- a/src/zen/frontend/html/index.html
+++ b/src/zen/frontend/html/index.html
@@ -9,6 +9,15 @@
<body>
<noscript>This viewer requires JavaScript.</noscript>
<div class="header">
+ <nav class="tabs">
+ <button class="tab active" data-tab="timeline">Timeline</button>
+ <button class="tab" data-tab="stats">Stats</button>
+ <button class="tab" data-tab="memory">Memory</button>
+ <button class="tab" data-tab="logs">Logs</button>
+ <button class="tab" data-tab="csv">CSV</button>
+ <button class="tab" data-tab="counters">Counters</button>
+ <button class="tab" data-tab="session">Session</button>
+ </nav>
<div class="header-title">zen trace viewer</div>
<div class="header-file" id="hdr-file"></div>
<div class="header-stats" id="hdr-stats"></div>
@@ -16,14 +25,6 @@
</div>
<div class="layout">
<aside class="sidebar">
- <nav class="tabs">
- <button class="tab active" data-tab="timeline">Timeline</button>
- <button class="tab" data-tab="stats">Stats</button>
- <button class="tab" data-tab="memory">Memory</button>
- <button class="tab" data-tab="logs">Logs</button>
- <button class="tab" data-tab="csv">CSV</button>
- <button class="tab" data-tab="session">Session</button>
- </nav>
<div class="sidebar-section">
<div class="sidebar-label">Search scopes</div>
<input id="search-input" type="text" placeholder="filter scopes..." autocomplete="off" spellcheck="false">
@@ -50,6 +51,10 @@
<input type="checkbox" id="lod-toggle" checked>
<span>LOD</span>
</label>
+ <label class="toolbar-toggle" title="Compact rows: thinner swimlanes, hides in-bar labels (shortcut: c)">
+ <input type="checkbox" id="compact-toggle">
+ <span>Compact</span>
+ </label>
<button id="zoom-reset" class="btn">Reset view</button>
</div>
<div class="timeline-frame">
@@ -84,6 +89,9 @@
<section class="view view-csv" data-view="csv" hidden>
<div id="csv-content"></div>
</section>
+ <section class="view view-counters" data-view="counters" hidden>
+ <div id="counters-content"></div>
+ </section>
<section class="view view-session" data-view="session" hidden>
<div id="session-content" class="session-content"></div>
</section>
diff --git a/src/zen/frontend/html/logs.js b/src/zen/frontend/html/logs.js
index d9646ba39..f0498dde2 100644
--- a/src/zen/frontend/html/logs.js
+++ b/src/zen/frontend/html/logs.js
@@ -2,6 +2,7 @@
// Log viewer: filterable list of captured Logging.LogMessage events.
import { getLogs } from "./api.js";
+import { escapeHtml } from "./util.js";
// UE ELogVerbosity::Type values — lower number = more severe.
const VERBOSITY_LABELS = [
@@ -16,16 +17,6 @@ const VERBOSITY_LABELS = [
"All",
];
-function escapeHtml(s) {
- return String(s).replace(/[&<>"']/g, (c) => ({
- "&": "&amp;",
- "<": "&lt;",
- ">": "&gt;",
- "\"": "&quot;",
- "'": "&#39;",
- }[c]));
-}
-
function verbosityLabel(v) {
return VERBOSITY_LABELS[v] || `V${v}`;
}
diff --git a/src/zen/frontend/html/memory.js b/src/zen/frontend/html/memory.js
index 6b9760439..6e4d51061 100644
--- a/src/zen/frontend/html/memory.js
+++ b/src/zen/frontend/html/memory.js
@@ -1,17 +1,9 @@
// Copyright Epic Games, Inc. All Rights Reserved.
-// Interactive memory analysis view: summary cards, memory timeline, leak/churn/hot callsite tables.
+// Interactive memory analysis view: summary cards, memory timeline, and a
+// tabbed callsite panel (Leaky / Churn / Hot) sharing one slot below the chart.
import { getAllocSummary, getMemoryTimeline, getCallstackStats, getChurnStats, getCallstack, getAllocSizeHistogram } from "./api.js";
-
-function escapeHtml(s) {
- return String(s).replace(/[&<>"']/g, (c) => ({
- "&": "&amp;",
- "<": "&lt;",
- ">": "&gt;",
- '"': "&quot;",
- "'": "&#39;",
- }[c]));
-}
+import { escapeHtml } from "./util.js";
function formatNum(n) {
return Number(n || 0).toLocaleString();
@@ -187,10 +179,17 @@ export class MemoryView {
churn: { sortKey: "churn_allocs", desc: true, groupMode: "none", filterText: "" },
hot: { sortKey: "total_allocs", desc: true, groupMode: "none", filterText: "" },
};
+ this.activeTable = "leaks";
this.loadStateFromUrl();
this.buildLayout();
}
+ static TAB_DEFS = [
+ { name: "leaks", label: "Leaky callsites" },
+ { name: "churn", label: "Churn" },
+ { name: "hot", label: "Hot callsites" },
+ ];
+
buildLayout() {
this.container.innerHTML =
`<div class="memory-view">` +
@@ -222,6 +221,12 @@ export class MemoryView {
`</div>` +
`</div>` +
`<div class="memory-grid">` +
+ `<div class="memory-tabbed">` +
+ `<div class="memory-tab-bar" role="tablist">` +
+ MemoryView.TAB_DEFS.map(({ name, label }) =>
+ `<button type="button" class="memory-tab" role="tab" data-mem-tab="${name}" id="memory-tab-${name}" aria-controls="memory-tabpanel-${name}">${escapeHtml(label)}</button>`
+ ).join("") +
+ `</div>` +
this.buildPanelMarkup("leaks", "Leaky callsites", "Top live allocation stacks", [
["live_bytes", "Live bytes"],
["live_count", "Live allocs"],
@@ -239,6 +244,7 @@ export class MemoryView {
["churn_allocs", "Churn allocs"],
["summary", "Summary"],
]) +
+ `</div>` +
`<div class="memory-panel memory-callstack-panel">` +
`<div class="memory-panel-header"><div class="memory-panel-title">Callstack details</div><div class="memory-panel-subtitle" id="memory-callstack-meta">Select a row to inspect its frames</div></div>` +
`<div class="memory-callstack-body" id="memory-callstack-body"><div class="memory-empty">No callstack selected.</div></div>` +
@@ -339,6 +345,17 @@ export class MemoryView {
this.updateFilterButton(name);
}
+ this.tabButtons = {};
+ this.tabPanels = {};
+ for (const { name } of MemoryView.TAB_DEFS) {
+ const button = this.container.querySelector(`[data-mem-tab="${name}"]`);
+ const panel = this.container.querySelector(`[data-mem-tabpanel="${name}"]`);
+ this.tabButtons[name] = button;
+ this.tabPanels[name] = panel;
+ button.addEventListener("click", () => this.setActiveTable(name));
+ }
+ this.setActiveTable(this.activeTable, /*save=*/ false);
+
this.container.addEventListener("keydown", (e) => {
if (e.key !== "/" || e.defaultPrevented) {
return;
@@ -352,20 +369,39 @@ export class MemoryView {
if (activeView && activeView.hidden) {
return;
}
- const firstFilter = this.panelRefs.leaks.filter;
- if (firstFilter) {
- firstFilter.focus();
- firstFilter.select();
+ const activeFilter = this.panelRefs[this.activeTable]?.filter;
+ if (activeFilter) {
+ activeFilter.focus();
+ activeFilter.select();
}
});
this.container.tabIndex = -1;
this.container.dataset.memoryView = "true";
}
+ setActiveTable(name, save = true) {
+ if (!this.tabButtons || !this.tabButtons[name]) {
+ return;
+ }
+ this.activeTable = name;
+ for (const { name: tabName } of MemoryView.TAB_DEFS) {
+ const isActive = tabName === name;
+ const button = this.tabButtons[tabName];
+ const panel = this.tabPanels[tabName];
+ button.classList.toggle("active", isActive);
+ button.setAttribute("aria-selected", isActive ? "true" : "false");
+ button.tabIndex = isActive ? 0 : -1;
+ panel.hidden = !isActive;
+ }
+ if (save) {
+ this.saveStateToUrl();
+ }
+ }
+
buildPanelMarkup(name, title, subtitle, sortOptions) {
const sortHtml = sortOptions.map(([value, label]) => `<option value="${value}">${escapeHtml(label)}</option>`).join("");
return `
- <div class="memory-panel">
+ <div class="memory-panel memory-tabpanel" data-mem-tabpanel="${name}" id="memory-tabpanel-${name}" role="tabpanel" aria-labelledby="memory-tab-${name}" hidden>
<div class="memory-panel-header memory-panel-header-wrap">
<div>
<div class="memory-panel-title">${escapeHtml(title)}</div>
@@ -393,6 +429,10 @@ export class MemoryView {
if (histogramMetric === "count" || histogramMetric === "bytes") {
this.histogramMetric = histogramMetric;
}
+ const activeTable = params.get("mem_table");
+ if (activeTable && this.tableState[activeTable]) {
+ this.activeTable = activeTable;
+ }
for (const [name, state] of Object.entries(this.tableState)) {
const sortKey = params.get(`mem_${name}_sort`);
const groupMode = params.get(`mem_${name}_group`);
@@ -419,6 +459,7 @@ export class MemoryView {
saveStateToUrl() {
const url = new URL(window.location.href);
url.searchParams.set("mem_hist_metric", this.histogramMetric);
+ url.searchParams.set("mem_table", this.activeTable);
for (const [name, state] of Object.entries(this.tableState)) {
url.searchParams.set(`mem_${name}_sort`, state.sortKey);
url.searchParams.set(`mem_${name}_group`, state.groupMode);
diff --git a/src/zen/frontend/html/timeline.js b/src/zen/frontend/html/timeline.js
index f463a8418..e0fd64181 100644
--- a/src/zen/frontend/html/timeline.js
+++ b/src/zen/frontend/html/timeline.js
@@ -2,16 +2,35 @@
// Canvas-drawn flame graph with per-thread swimlanes, pan+zoom, hover
// tooltip, click-to-select and scope-name highlighting.
-const HEADER_H = 18; // thread name row height
-const DEPTH_H = 16; // scope lane row height
const MAX_DRAWN_DEPTH = 32;
-const MIN_RECT_W = 1.5; // don't draw narrower than this (px)
-const RULER_H = 20;
-const THREAD_GAP = 6;
-const PADDING_X = 0;
-const REGION_LANE_H = 18; // region band row height
-const REGION_HEADER_H = 16; // category header row height
-const REGIONS_GAP = 6; // gap between the region rack and the first thread
+const MIN_RECT_W = 1.5; // don't draw narrower than this (px)
+const RULER_H = 20;
+const THREAD_GAP = 6;
+const PADDING_X = 0;
+const REGIONS_GAP = 6; // gap between the region rack and the first thread
+
+// Per-mode row metrics. Compact mode (toggled with 'c') shrinks every
+// vertical dimension so the flame graph fits many more threads/depths in
+// the viewport at the cost of in-bar text labels.
+const METRICS_NORMAL = {
+ headerH: 18, // thread name row height
+ depthH: 16, // scope lane row height
+ regionLaneH: 18, // region band row height
+ regionHeaderH: 16, // region category header row height
+ scopeFontPx: 11, // in-bar scope label font size
+ headerFontPx: 11, // thread header / region row font size
+ showLabels: true,
+};
+
+const METRICS_COMPACT = {
+ headerH: 12,
+ depthH: 4,
+ regionLaneH: 6,
+ regionHeaderH: 12,
+ scopeFontPx: 0, // labels too tall to fit; suppressed
+ headerFontPx: 9,
+ showLabels: false,
+};
// Scope colors: golden-angle hue rotation keyed on NameId so the same scope
// always renders in the same color across zoom levels.
@@ -69,6 +88,8 @@ export class Timeline {
this.bookmarks = (this.model.bookmarks || []).slice().sort((a, b) => a.time_us - b.time_us);
this.bookmarksVisible = true;
+ this.compact = false;
+ this.metrics = METRICS_NORMAL;
this.regionCategories = (this.model.regionCategories || []).filter(c => c.lane_count > 0);
// All categories enabled by default; renderRegionCategories() calls
// setEnabledRegionCategories() shortly after construction.
@@ -144,6 +165,17 @@ export class Timeline {
this.requestDraw();
}
+ setCompact(compact) {
+ const next = !!compact;
+ if (next === this.compact) return;
+ this.compact = next;
+ this.metrics = next ? METRICS_COMPACT : METRICS_NORMAL;
+ this.recomputeRegionsBlockH();
+ this.requestDraw();
+ }
+
+ toggleCompact() { this.setCompact(!this.compact); }
+
setEnabledRegionCategories(indices) {
this.enabledRegionCategories = indices instanceof Set ? indices : new Set(indices);
this.recomputeRegionsBlockH();
@@ -152,10 +184,11 @@ export class Timeline {
recomputeRegionsBlockH() {
this.regionsBlockH = 0;
+ const M = this.metrics || METRICS_NORMAL;
for (let i = 0; i < this.regionCategories.length; i++) {
if (!this.enabledRegionCategories || !this.enabledRegionCategories.has(i)) continue;
const cat = this.regionCategories[i];
- this.regionsBlockH += REGION_HEADER_H + cat.lane_count * REGION_LANE_H;
+ this.regionsBlockH += M.regionHeaderH + cat.lane_count * M.regionLaneH;
}
if (this.regionsBlockH > 0) {
this.regionsBlockH += REGIONS_GAP;
@@ -406,6 +439,7 @@ export class Timeline {
if (ma.thread_id !== mb.thread_id) return ma.thread_id - mb.thread_id;
return (ma.name || "").localeCompare(mb.name || "", undefined, { numeric: true });
});
+ const M = this.metrics;
for (const threadId of sorted) {
const timeline = this.timelines.get(threadId);
const scopes = timeline ? timeline.scopes : [];
@@ -414,8 +448,8 @@ export class Timeline {
if (s[3] > maxDepth) maxDepth = s[3];
}
if (maxDepth > MAX_DRAWN_DEPTH) maxDepth = MAX_DRAWN_DEPTH;
- const rowH = HEADER_H + (maxDepth + 1) * DEPTH_H;
- rows.push({ threadId, y, headerH: HEADER_H, maxDepth, height: rowH });
+ const rowH = M.headerH + (maxDepth + 1) * M.depthH;
+ rows.push({ threadId, y, headerH: M.headerH, maxDepth, height: rowH });
y += rowH + THREAD_GAP;
}
// y now points at the bottom of the last row in scrolled coords.
@@ -467,6 +501,7 @@ export class Timeline {
const fg1 = getComputedStyle(document.body).getPropertyValue("--fg1") || "#c9d1d9";
const fg2 = getComputedStyle(document.body).getPropertyValue("--fg2") || "#8b949e";
+ const M = this.metrics;
for (const row of rows) {
if (row.y > H) break;
if (row.y + row.height < RULER_H) continue;
@@ -479,14 +514,14 @@ export class Timeline {
const prefix = isLane ? "⬦ " : "";
const label = `${prefix}${(meta && meta.name) || `tid ${row.threadId}`} · ${row.threadId}`;
ctx.fillStyle = isLane ? "rgba(180, 140, 255, 0.8)" : fg2;
- ctx.font = "11px -apple-system, Segoe UI, sans-serif";
+ ctx.font = `${M.headerFontPx}px -apple-system, Segoe UI, sans-serif`;
ctx.textBaseline = "middle";
ctx.fillText(label, 6, row.y + row.headerH / 2);
// Swimlane backgrounds
for (let d = 0; d <= row.maxDepth; d++) {
ctx.fillStyle = d % 2 === 0 ? "rgba(255,255,255,0.015)" : "rgba(255,255,255,0.00)";
- ctx.fillRect(0, row.y + row.headerH + d * DEPTH_H, W, DEPTH_H);
+ ctx.fillRect(0, row.y + row.headerH + d * M.depthH, W, M.depthH);
}
const timeline = this.timelines.get(row.threadId);
@@ -554,6 +589,7 @@ export class Timeline {
drawRegions(ctx, W) {
if (this.regionCategories.length === 0) return;
+ const M = this.metrics;
const startUs = this.startUs;
const endUs = this.endUs;
const pxPerUs = this.pxPerUs();
@@ -566,13 +602,15 @@ export class Timeline {
const cat = this.regionCategories[ci];
// Category header
ctx.fillStyle = bg1;
- ctx.fillRect(0, catY, W, REGION_HEADER_H);
- ctx.fillStyle = fg2;
- ctx.font = "10px -apple-system, Segoe UI, sans-serif";
- ctx.textBaseline = "middle";
- ctx.textAlign = "left";
- ctx.fillText(`Timing Regions \u2013 ${cat.name}`, 6, catY + REGION_HEADER_H / 2);
- catY += REGION_HEADER_H;
+ ctx.fillRect(0, catY, W, M.regionHeaderH);
+ if (M.showLabels) {
+ ctx.fillStyle = fg2;
+ ctx.font = "10px -apple-system, Segoe UI, sans-serif";
+ ctx.textBaseline = "middle";
+ ctx.textAlign = "left";
+ ctx.fillText(`Timing Regions \u2013 ${cat.name}`, 6, catY + M.regionHeaderH / 2);
+ }
+ catY += M.regionHeaderH;
// Region bands for this category
for (const r of cat.regions) {
@@ -585,35 +623,35 @@ export class Timeline {
const w = Math.max(MIN_RECT_W, (endRegUs - beginUs) * pxPerUs);
if (w < MIN_RECT_W) continue;
- const y = catY + r.depth * REGION_LANE_H;
+ const y = catY + r.depth * M.regionLaneH;
ctx.fillStyle = regionFillColor(r.name);
- ctx.fillRect(x, y + 1, w, REGION_LANE_H - 2);
+ ctx.fillRect(x, y + 1, w, M.regionLaneH - 2);
ctx.strokeStyle = "rgba(255,255,255,0.2)";
ctx.lineWidth = 1;
- ctx.strokeRect(x + 0.5, y + 1.5, w - 1, REGION_LANE_H - 3);
+ ctx.strokeRect(x + 0.5, y + 1.5, w - 1, M.regionLaneH - 3);
const visX = Math.max(x, 0);
const visRight = Math.min(x + w, this.width);
const visW = visRight - visX;
- if (visW > 24 && r.name) {
+ if (M.showLabels && visW > 24 && r.name) {
ctx.fillStyle = "rgba(255,255,255,0.95)";
ctx.font = "11px -apple-system, Segoe UI, sans-serif";
ctx.textBaseline = "middle";
ctx.textAlign = "left";
ctx.save();
ctx.beginPath();
- ctx.rect(visX + 3, y, visW - 6, REGION_LANE_H);
+ ctx.rect(visX + 3, y, visW - 6, M.regionLaneH);
ctx.clip();
- ctx.fillText(r.name, visX + 5, y + REGION_LANE_H / 2);
+ ctx.fillText(r.name, visX + 5, y + M.regionLaneH / 2);
ctx.restore();
}
- this.hits.push({ x, y, w, h: REGION_LANE_H - 2, region: r, regionCategory: cat.name });
+ this.hits.push({ x, y, w, h: M.regionLaneH - 2, region: r, regionCategory: cat.name });
}
- catY += cat.lane_count * REGION_LANE_H;
+ catY += cat.lane_count * M.regionLaneH;
}
}
@@ -660,6 +698,8 @@ export class Timeline {
drawScopes(ctx, timeline, row, pxPerUs, textColor) {
const { scopes, perDepth } = timeline;
+ const M = this.metrics;
+ const depthH = M.depthH;
const startUs = this.startUs;
const endUs = this.endUs;
@@ -669,7 +709,9 @@ export class Timeline {
ctx.textBaseline = "middle";
ctx.textAlign = "left";
- ctx.font = "11px -apple-system, Segoe UI, sans-serif";
+ if (M.showLabels) {
+ ctx.font = `${M.scopeFontPx}px -apple-system, Segoe UI, sans-serif`;
+ }
const rowTop = row.y + row.headerH;
const maxDepth = Math.min(row.maxDepth, perDepth.length - 1);
@@ -695,7 +737,11 @@ export class Timeline {
}
}
- const y = rowTop + depth * DEPTH_H;
+ const y = rowTop + depth * depthH;
+ // Compact mode shrinks the bar to the row height; normal mode
+ // leaves a 1px gap top and bottom for readability.
+ const barTop = M.showLabels ? y + 1 : y;
+ const barH = M.showLabels ? depthH - 2 : depthH;
let rendered = 0;
for (let j = lo; j < indices.length; j++) {
const s = scopes[indices[j]];
@@ -718,39 +764,44 @@ export class Timeline {
ctx.fillStyle = isHighlighted
? `hsl(${hue.toFixed(0)}, 50%, 50%)`
: `hsl(${hue.toFixed(0)}, 30%, 35%)`;
- ctx.fillRect(x, y + 1, w, DEPTH_H - 2);
- ctx.strokeStyle = "rgba(255,255,255,0.25)";
- ctx.lineWidth = 1;
- ctx.setLineDash([2, 2]);
- ctx.beginPath();
- ctx.moveTo(x, y + 1.5);
- ctx.lineTo(x + w, y + 1.5);
- ctx.stroke();
- ctx.setLineDash([]);
+ ctx.fillRect(x, barTop, w, barH);
+ if (M.showLabels) {
+ ctx.strokeStyle = "rgba(255,255,255,0.25)";
+ ctx.lineWidth = 1;
+ ctx.setLineDash([2, 2]);
+ ctx.beginPath();
+ ctx.moveTo(x, barTop + 0.5);
+ ctx.lineTo(x + w, barTop + 0.5);
+ ctx.stroke();
+ ctx.setLineDash([]);
+ }
} else {
ctx.fillStyle = isHighlighted ? scopeHighlightColor(nameId) : scopeFillColor(nameId);
- ctx.fillRect(x, y + 1, w, DEPTH_H - 2);
+ ctx.fillRect(x, barTop, w, barH);
}
// Draw the label pinned to the visible portion of the rect
- // so zooming into a long scope still shows its name.
- const visX = Math.max(x, 0);
- const visRight = Math.min(x + w, this.width);
- const visW = visRight - visX;
- if (visW > 30) {
- const name = this.model.scopeNames[nameId] || "?";
- const maxChars = Math.floor((visW - 6) / 6);
- const shown = name.length > maxChars ? name.slice(0, Math.max(0, maxChars - 1)) + "…" : name;
- ctx.fillStyle = "rgba(255,255,255,0.95)";
- ctx.save();
- ctx.beginPath();
- ctx.rect(visX + 3, y, visW - 6, DEPTH_H);
- ctx.clip();
- ctx.fillText(shown, visX + 4, y + DEPTH_H / 2);
- ctx.restore();
+ // so zooming into a long scope still shows its name. Skipped
+ // in compact mode where the bar is too short for readable text.
+ if (M.showLabels) {
+ const visX = Math.max(x, 0);
+ const visRight = Math.min(x + w, this.width);
+ const visW = visRight - visX;
+ if (visW > 30) {
+ const name = this.model.scopeNames[nameId] || "?";
+ const maxChars = Math.floor((visW - 6) / 6);
+ const shown = name.length > maxChars ? name.slice(0, Math.max(0, maxChars - 1)) + "…" : name;
+ ctx.fillStyle = "rgba(255,255,255,0.95)";
+ ctx.save();
+ ctx.beginPath();
+ ctx.rect(visX + 3, y, visW - 6, depthH);
+ ctx.clip();
+ ctx.fillText(shown, visX + 4, y + depthH / 2);
+ ctx.restore();
+ }
}
- this.hits.push({ x, y, w, h: DEPTH_H - 2, threadId: row.threadId, tuple: s });
+ this.hits.push({ x, y, w, h: depthH, threadId: row.threadId, tuple: s });
}
}
}
@@ -764,12 +815,13 @@ export class Timeline {
const { rows } = this.layoutThreads();
const row = rows.find((r) => r.threadId === this.selected.threadId);
if (!row) return;
+ const M = this.metrics;
const x = this.xAtUs(beginUs);
const w = Math.max(MIN_RECT_W, durationUs * this.pxPerUs());
- const y = row.y + row.headerH + depth * DEPTH_H;
+ const y = row.y + row.headerH + depth * M.depthH;
ctx.strokeStyle = "#ffffff";
ctx.lineWidth = 1.5;
- ctx.strokeRect(x - 0.5, y + 0.5, w + 1, DEPTH_H - 1);
+ ctx.strokeRect(x - 0.5, y + 0.5, w + 1, M.depthH - 1);
}
drawViewportInfo() {
diff --git a/src/zen/frontend/html/trace.css b/src/zen/frontend/html/trace.css
index 2ff324019..5b9bb28c6 100644
--- a/src/zen/frontend/html/trace.css
+++ b/src/zen/frontend/html/trace.css
@@ -87,18 +87,27 @@ pre, code, .mono {
.header {
display: flex;
- align-items: center;
+ align-items: stretch;
gap: 16px;
- padding: 10px 16px;
+ padding: 0 16px;
background: var(--bg1);
border-bottom: 1px solid var(--border);
flex-shrink: 0;
+ min-height: 40px;
+}
+
+.header > .header-title,
+.header > .header-file,
+.header > .header-stats,
+.header > .header-btn {
+ align-self: center;
}
.header-title {
font-weight: 600;
color: var(--fg0);
font-size: 14px;
+ white-space: nowrap;
}
.header-file {
@@ -172,16 +181,19 @@ pre, code, .mono {
}
/* -- tabs ------------------------------------------------------------------ */
+/* Tabs live inside the header bar at the top, alongside the title / file
+ * path / stats. Each tab is a button that owns its own underline so the
+ * active state aligns flush with the header's bottom border. */
.tabs {
display: flex;
- border-bottom: 1px solid var(--border);
flex-shrink: 0;
+ height: 100%;
+ margin-left: -8px; /* let first tab sit closer to the left edge */
}
.tab {
- flex: 1;
- padding: 10px 8px;
+ padding: 0 14px;
background: transparent;
border: none;
border-bottom: 2px solid transparent;
@@ -191,6 +203,10 @@ pre, code, .mono {
cursor: pointer;
text-transform: uppercase;
letter-spacing: 0.5px;
+ white-space: nowrap;
+ display: flex;
+ align-items: center;
+ margin-bottom: -1px; /* overlap header's bottom border so the underline sits flush */
}
.tab:hover {
@@ -1165,7 +1181,7 @@ pre, code, .mono {
.memory-grid {
display: grid;
- grid-template-columns: repeat(2, minmax(0, 1fr));
+ grid-template-columns: minmax(0, 1fr);
gap: 16px;
}
@@ -1173,6 +1189,46 @@ pre, code, .mono {
grid-column: 1 / -1;
}
+.memory-tabbed {
+ display: flex;
+ flex-direction: column;
+ gap: 0;
+}
+
+.memory-tab-bar {
+ display: flex;
+ flex-wrap: wrap;
+ gap: 4px;
+ padding: 0 4px;
+ border-bottom: 1px solid var(--border-soft);
+ margin-bottom: -1px;
+}
+
+.memory-tab {
+ padding: 8px 14px;
+ background: transparent;
+ border: none;
+ border-bottom: 2px solid transparent;
+ color: var(--fg2);
+ font-size: 12px;
+ font-weight: 500;
+ cursor: pointer;
+ text-transform: uppercase;
+ letter-spacing: 0.5px;
+ white-space: nowrap;
+ margin-bottom: -1px;
+}
+
+.memory-tab:hover {
+ color: var(--fg0);
+ background: var(--bg2);
+}
+
+.memory-tab.active {
+ color: var(--accent);
+ border-bottom-color: var(--accent);
+}
+
.memory-table-wrap {
overflow: auto;
max-height: 360px;
@@ -1305,8 +1361,3 @@ pre, code, .mono {
font-size: 12px;
}
-@media (max-width: 1200px) {
- .memory-grid {
- grid-template-columns: 1fr;
- }
-}
diff --git a/src/zen/frontend/html/trace.js b/src/zen/frontend/html/trace.js
index 2910da15d..2c0b7a3bd 100644
--- a/src/zen/frontend/html/trace.js
+++ b/src/zen/frontend/html/trace.js
@@ -8,16 +8,8 @@ import { StatsView } from "./stats.js";
import { MemoryView } from "./memory.js";
import { LogsView } from "./logs.js";
import { CsvStatsView } from "./csvstats.js";
-
-function escapeHtml(s) {
- return String(s).replace(/[&<>"']/g, (c) => ({
- "&": "&amp;",
- "<": "&lt;",
- ">": "&gt;",
- "\"": "&quot;",
- "'": "&#39;",
- }[c]));
-}
+import { CountersView } from "./counters.js";
+import { escapeHtml } from "./util.js";
function formatTimeMs(us) {
if (us < 1000) return `${us} µs`;
@@ -157,10 +149,11 @@ async function main() {
const memoryView = new MemoryView(model, document.getElementById("memory-content"));
const logsView = new LogsView(model, document.getElementById("logs-content"));
const csvView = new CsvStatsView(model, document.getElementById("csv-content"));
+ const countersView = new CountersView(model, document.getElementById("counters-content"));
const threadsListApi = renderThreadsList(model, timeline);
renderRegionCategories(model, timeline);
- setupTabs(memoryView, logsView, csvView);
+ setupTabs(memoryView, logsView, csvView, countersView);
setupSearch(model, timeline, stats);
const bookmarksToggle = document.getElementById("bookmarks-toggle");
@@ -173,6 +166,26 @@ async function main() {
timeline.setLodEnabled(lodToggle.checked);
});
+ const compactToggle = document.getElementById("compact-toggle");
+ compactToggle.addEventListener("change", () => {
+ timeline.setCompact(compactToggle.checked);
+ });
+
+ // 'c' toggles compact mode while the timeline tab is active. Skipped
+ // when focus is in a text input so typing 'c' in the search box still
+ // works normally.
+ document.addEventListener("keydown", (e) => {
+ if (e.key !== "c" && e.key !== "C") return;
+ if (e.ctrlKey || e.metaKey || e.altKey) return;
+ const target = e.target;
+ if (target && (target.tagName === "INPUT" || target.tagName === "TEXTAREA" || target.isContentEditable)) return;
+ const timelineTab = document.querySelector(".tab[data-tab='timeline']");
+ if (!timelineTab || !timelineTab.classList.contains("active")) return;
+ e.preventDefault();
+ compactToggle.checked = !compactToggle.checked;
+ timeline.setCompact(compactToggle.checked);
+ });
+
// Enable all threads that actually have captured scopes by default; if
// none do, enable every thread so the swimlanes still show up empty.
const withScopes = model.threads.filter((t) => t.scope_count > 0).map((t) => t.thread_id);
@@ -492,7 +505,7 @@ function renderRegionCategories(model, timeline) {
timeline.setEnabledRegionCategories(allIndices);
}
-function setupTabs(memoryView, logsView, csvView) {
+function setupTabs(memoryView, logsView, csvView, countersView) {
const tabs = document.querySelectorAll(".tab");
const views = document.querySelectorAll(".view");
const validTabs = new Set(Array.from(tabs, (tab) => tab.dataset.tab));
@@ -518,6 +531,9 @@ function setupTabs(memoryView, logsView, csvView) {
if (key === "csv" && csvView) {
csvView.ensureLoaded();
}
+ if (key === "counters" && countersView) {
+ countersView.ensureLoaded();
+ }
}
for (const tab of tabs) {
diff --git a/src/zen/frontend/html/util.js b/src/zen/frontend/html/util.js
new file mode 100644
index 000000000..34241c9ae
--- /dev/null
+++ b/src/zen/frontend/html/util.js
@@ -0,0 +1,16 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+// Tiny shared helpers used across the trace-viewer modules.
+
+// Escape characters that have special meaning inside an HTML context (text or
+// attribute) so that user-supplied strings can be safely interpolated into
+// .innerHTML / template literals. Coerces the input to string first so callers
+// don't have to.
+export function escapeHtml(s) {
+ return String(s).replace(/[&<>"']/g, (c) => ({
+ "&": "&amp;",
+ "<": "&lt;",
+ ">": "&gt;",
+ "\"": "&quot;",
+ "'": "&#39;",
+ }[c]));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-06-06 20:21:25 +0000