1 files changed, 218 insertions, 0 deletions
diff --git a/dom/base/test/fullscreen/browser_fullscreen-api-keys.js b/dom/base/test/fullscreen/browser_fullscreen-api-keys.js
new file mode 100644
index 0000000000..1b1a07975e
--- /dev/null
+++ b/dom/base/test/fullscreen/browser_fullscreen-api-keys.js
@@ -0,0 +1,218 @@
+"use strict";
+
+// This test tends to trigger a race in the fullscreen time telemetry,
+// where the fullscreen enter and fullscreen exit events (which use the
+// same histogram ID) overlap. That causes TelemetryStopwatch to log an
+// error.
+SimpleTest.ignoreAllUncaughtExceptions(true);
+
+/** Test for Bug 545812 **/
+
+// List of key codes which should exit full-screen mode.
+const kKeyList = [
+  { key: "Escape", keyCode: "VK_ESCAPE", suppressed: true },
+  { key: "F11", keyCode: "VK_F11", suppressed: false },
+];
+
+function receiveExpectedKeyEvents(aBrowser, aKeyCode, aTrusted) {
+  return SpecialPowers.spawn(
+    aBrowser,
+    [aKeyCode, aTrusted],
+    (keyCode, trusted) => {
+      return new Promise(resolve => {
+        let events = trusted
+          ? ["keydown", "keyup"]
+          : ["keydown", "keypress", "keyup"];
+        if (trusted && keyCode == content.wrappedJSObject.KeyEvent.DOM_VK_F11) {
+          // trusted `F11` key shouldn't be fired because of reserved when it's
+          // a shortcut key for exiting from the full screen mode.
+          events.shift();
+        }
+        function listener(event) {
+          let expected = events.shift();
+          Assert.equal(
+            event.type,
+            expected,
+            `Should receive a ${expected} event`
+          );
+          Assert.equal(
+            event.keyCode,
+            keyCode,
+            `Should receive the event with key code ${keyCode}`
+          );
+          if (!events.length) {
+            content.document.removeEventListener("keydown", listener, true);
+            content.document.removeEventListener("keyup", listener, true);
+            content.document.removeEventListener("keypress", listener, true);
+            resolve();
+          }
+        }
+
+        content.document.addEventListener("keydown", listener, true);
+        content.document.addEventListener("keyup", listener, true);
+        content.document.addEventListener("keypress", listener, true);
+      });
+    }
+  );
+}
+
+const kPage =
+  "https://example.org/browser/" +
+  "dom/base/test/fullscreen/file_fullscreen-api-keys.html";
+
+add_task(async function () {
+  await pushPrefs(
+    ["full-screen-api.transition-duration.enter", "0 0"],
+    ["full-screen-api.transition-duration.leave", "0 0"]
+  );
+
+  let tab = BrowserTestUtils.addTab(gBrowser, kPage);
+  let browser = tab.linkedBrowser;
+  gBrowser.selectedTab = tab;
+  registerCleanupFunction(() => gBrowser.removeTab(tab));
+  await waitForDocLoadComplete();
+
+  // Wait for the document being activated, so that
+  // fullscreen request won't be denied.
+  await SpecialPowers.spawn(browser, [], () => {
+    return ContentTaskUtils.waitForCondition(
+      () => content.browsingContext.isActive && content.document.hasFocus(),
+      "document is active"
+    );
+  });
+
+  // Register listener to capture unexpected events
+  let keyEventsCount = 0;
+  let fullScreenEventsCount = 0;
+  let removeFullScreenListener = BrowserTestUtils.addContentEventListener(
+    browser,
+    "fullscreenchange",
+    () => fullScreenEventsCount++
+  );
+  let removeKeyDownListener = BrowserTestUtils.addContentEventListener(
+    browser,
+    "keydown",
+    () => keyEventsCount++,
+    { wantUntrusted: true }
+  );
+  let removeKeyPressListener = BrowserTestUtils.addContentEventListener(
+    browser,
+    "keypress",
+    () => keyEventsCount++,
+    { wantUntrusted: true }
+  );
+  let removeKeyUpListener = BrowserTestUtils.addContentEventListener(
+    browser,
+    "keyup",
+    () => keyEventsCount++,
+    { wantUntrusted: true }
+  );
+
+  let expectedFullScreenEventsCount = 0;
+  let expectedKeyEventsCount = 0;
+
+  for (let { key, keyCode, suppressed } of kKeyList) {
+    let keyCodeValue = KeyEvent["DOM_" + keyCode];
+    info(`Test keycode ${key} (${keyCodeValue})`);
+
+    info("Enter fullscreen");
+    let state = new Promise(resolve => {
+      let removeFun = BrowserTestUtils.addContentEventListener(
+        browser,
+        "fullscreenchange",
+        async () => {
+          removeFun();
+          resolve(
+            await SpecialPowers.spawn(browser, [], () => {
+              return !!content.document.fullscreenElement;
+            })
+          );
+        }
+      );
+    });
+    // request fullscreen
+    SpecialPowers.spawn(browser, [], () => {
+      content.document.body.requestFullscreen();
+    });
+    ok(await state, "The content should have entered fullscreen");
+    ok(document.fullscreenElement, "The chrome should also be in fullscreen");
+
+    is(
+      fullScreenEventsCount,
+      ++expectedFullScreenEventsCount,
+      "correct number of fullscreen events occurred"
+    );
+
+    info("Dispatch untrusted key events from content");
+    let promiseExpectedKeyEvents = receiveExpectedKeyEvents(
+      browser,
+      keyCodeValue,
+      false
+    );
+
+    SpecialPowers.spawn(browser, [keyCode], keyCodeChild => {
+      var evt = new content.CustomEvent("Test:DispatchKeyEvents", {
+        detail: Cu.cloneInto({ code: keyCodeChild }, content),
+      });
+      content.dispatchEvent(evt);
+    });
+    await promiseExpectedKeyEvents;
+
+    expectedKeyEventsCount += 3;
+    is(
+      keyEventsCount,
+      expectedKeyEventsCount,
+      "correct number of key events occurred"
+    );
+
+    info("Send trusted key events");
+
+    state = new Promise(resolve => {
+      let removeFun = BrowserTestUtils.addContentEventListener(
+        browser,
+        "fullscreenchange",
+        async () => {
+          removeFun();
+          resolve(
+            await SpecialPowers.spawn(browser, [], () => {
+              return !!content.document.fullscreenElement;
+            })
+          );
+        }
+      );
+    });
+
+    promiseExpectedKeyEvents = suppressed
+      ? Promise.resolve()
+      : receiveExpectedKeyEvents(browser, keyCodeValue, true);
+    await SpecialPowers.spawn(browser, [], () => {});
+
+    EventUtils.synthesizeKey("KEY_" + key);
+    await promiseExpectedKeyEvents;
+
+    ok(!(await state), "The content should have exited fullscreen");
+    ok(
+      !document.fullscreenElement,
+      "The chrome should also have exited fullscreen"
+    );
+
+    is(
+      fullScreenEventsCount,
+      ++expectedFullScreenEventsCount,
+      "correct number of fullscreen events occurred"
+    );
+    if (!suppressed) {
+      expectedKeyEventsCount += keyCode == "VK_F11" ? 1 : 3;
+    }
+    is(
+      keyEventsCount,
+      expectedKeyEventsCount,
+      "correct number of key events occurred"
+    );
+  }
+
+  removeFullScreenListener();
+  removeKeyDownListener();
+  removeKeyPressListener();
+  removeKeyUpListener();
+});