chore: add reproduction sample for printing issue

2026-05-07 04:15:55 +02:00 · 2026-04-15 22:43:34 +03:00
parent 99878a1d48
commit 598317ea6e
4 changed files with 142 additions and 0 deletions
--- a/scripts/electron-repros/printpdf-page-range/index.html
+++ b/scripts/electron-repros/printpdf-page-range/index.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>printToPDF Repro</title>
+    <style>
+        body { font-family: system-ui; padding: 20px; }
+        #log { white-space: pre-wrap; font-family: monospace; background: #f0f0f0; padding: 12px; margin-top: 16px; border-radius: 4px; max-height: 400px; overflow-y: auto; }
+        button { margin: 4px; padding: 8px 16px; cursor: pointer; }
+        .pass { color: green; } .fail { color: red; }
+    </style>
+</head>
+<body>
+    <h2>Electron printToPDF — Page Range State Corruption Repro</h2>
+    <p>Click <b>Run Test Sequence</b> to reproduce the bug. It will:</p>
+    <ol>
+        <li>Print with no page range (should succeed)</li>
+        <li>Print with page range "999" (should fail — page doesn't exist)</li>
+        <li>Print with no page range again (does it still work?)</li>
+    </ol>
+    <button id="run">Run Test Sequence</button>
+    <button id="run-fresh">Run Step 3 Only (fresh, no prior failure)</button>
+    <div id="log"></div>
+
+    <script>
+        const { ipcRenderer } = require("electron");
+        const logEl = document.getElementById("log");
+
+        function log(msg, cls) {
+            const line = document.createElement("div");
+            line.textContent = msg;
+            if (cls) line.className = cls;
+            logEl.appendChild(line);
+            logEl.scrollTop = logEl.scrollHeight;
+        }
+
+        async function runStep(step, pageRanges, description) {
+            log(`\n--- Step ${step}: ${description} (pageRanges=${JSON.stringify(pageRanges)}) ---`);
+            const result = await ipcRenderer.invoke("print-test", { pageRanges, step });
+            if (result.ok) {
+                log(`  ✓ SUCCESS (buffer: ${result.size} bytes)`, "pass");
+            } else {
+                log(`  ✗ FAILED: ${result.error}`, "fail");
+            }
+            return result;
+        }
+
+        document.getElementById("run").addEventListener("click", async () => {
+            logEl.textContent = "";
+            log("=== Test Sequence: state corruption after failed pageRanges ===");
+
+            await runStep(1, "",    "No page range (baseline)");
+            await runStep(2, "999", "Invalid page range (expect failure)");
+            await runStep(3, "",    "No page range again (does state persist?)");
+
+            log("\n=== Done ===");
+            log("If Step 3 fails with 'Page range exceeds page count',");
+            log("it confirms an Electron/Chromium state corruption bug.");
+        });
+
+        document.getElementById("run-fresh").addEventListener("click", async () => {
+            logEl.textContent = "";
+            log("=== Control: single call with no page range ===");
+            await runStep("C", "", "No page range (no prior failure)");
+            log("\n=== Done ===");
+        });
+    </script>
+</body>
+</html>
--- a/scripts/electron-repros/printpdf-page-range/main.js
+++ b/scripts/electron-repros/printpdf-page-range/main.js
@@ -0,0 +1,53 @@
+const { app, BrowserWindow, ipcMain } = require("electron");
+
+let mainWindow;
+
+app.whenReady().then(() => {
+    mainWindow = new BrowserWindow({
+        width: 800,
+        height: 600,
+        webPreferences: {
+            nodeIntegration: true,
+            contextIsolation: false,
+        },
+    });
+    mainWindow.loadFile("index.html");
+});
+
+ipcMain.handle("print-test", async (_e, { pageRanges, step }) => {
+    const printWindow = new BrowserWindow({
+        show: false,
+        width: 1,
+        height: 1,
+        webPreferences: { offscreen: process.platform !== "linux" },
+    });
+
+    await printWindow.loadFile("print-page.html");
+
+    // Wait for content to be ready.
+    await printWindow.webContents.executeJavaScript(
+        `new Promise(r => requestAnimationFrame(() => requestAnimationFrame(r)))`
+    );
+
+    const opts = {
+        landscape: false,
+        pageSize: "A4",
+        scale: 1,
+        printBackground: true,
+        // Only include pageRanges if truthy (non-empty string).
+        ...(pageRanges ? { pageRanges } : {}),
+    };
+
+    console.log(`[Step ${step}] printToPDF called with:`, JSON.stringify(opts));
+
+    try {
+        const buffer = await printWindow.webContents.printToPDF(opts);
+        console.log(`[Step ${step}] SUCCESS - buffer size: ${buffer.length}`);
+        printWindow.destroy();
+        return { ok: true, size: buffer.length };
+    } catch (err) {
+        console.error(`[Step ${step}] FAILED: ${err.message}`);
+        printWindow.destroy();
+        return { ok: false, error: err.message };
+    }
+});
--- a/scripts/electron-repros/printpdf-page-range/package.json
+++ b/scripts/electron-repros/printpdf-page-range/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "electron-printpdf-page-range-repro",
+  "version": "1.0.0",
+  "private": true,
+  "description": "Minimal repro for Electron printToPDF state corruption after an invalid pageRanges failure",
+  "main": "main.js",
+  "scripts": {
+    "start": "electron ."
+  },
+  "devDependencies": {
+    "electron": "^35.0.0"
+  }
+}
--- a/scripts/electron-repros/printpdf-page-range/print-page.html
+++ b/scripts/electron-repros/printpdf-page-range/print-page.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+<head><title>Print Test</title></head>
+<body>
+    <h1>Test Page</h1>
+    <p>This is a single-page document used to reproduce the printToPDF bug.</p>
+</body>
+</html>