| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="../../resources/accessibility-helper.js"></script> |
| <script src="../../resources/js-test.js"></script> |
| <script src="../../resources/ui-helper.js"></script> |
| <style> |
| #iframe { position: absolute; left: 50px; top: 50px; width: 300px; height: 300px; border: 0; } |
| </style> |
| </head> |
| <body> |
| |
| <iframe id="iframe" src="../resources/scrollable-iframe-content.html"></iframe> |
| |
| <script> |
| var output = "This test verifies that the root scroll view of a local iframe moves with the iframe's own content scroll (the behavior Books relies on), rather than staying pinned at the viewport.\n\n"; |
| // Emphasis on "the behavior Books relies on". If you want to change the behavior being tested here, make sure to test |
| // Books (which renders its content with WebKit) still works with VoiceOver and other ATs. |
| var initialX, scrolledX, delta; |
| var scrollView; |
| |
| if (window.accessibilityController) { |
| window.jsTestIsAsync = true; |
| |
| setTimeout(async function() { |
| var iframe = document.getElementById("iframe"); |
| |
| await waitForFrameGeometryReady(); |
| await waitFor(() => { |
| // Wait until the iframe's own document is loaded scrollable, so scrollTo() below |
| // actually moves it (otherwise it clamps to 0). |
| var doc = iframe.contentDocument; |
| return doc && doc.readyState === "complete" && doc.documentElement.scrollWidth > iframe.clientWidth; |
| }); |
| |
| await waitFor(() => { |
| var container = accessibilityController.accessibleElementById("iframe"); |
| scrollView = container ? container.childAtIndex(0) : null; |
| return scrollView && scrollView.isFrameGeometryInitialized; |
| }); |
| |
| initialX = scrollView.x; |
| // Scroll the iframe's own content horizontally (the frame scrolls its own document, like a column |
| // page-turn, as in the case of Books). scrollTo updates the frame's scroll offset synchronously. We |
| // read the scroll view's accessibility x in the same run-loop turn, which should track the scroll. |
| iframe.contentWindow.scrollTo(500, 0); |
| scrolledX = scrollView.x; |
| |
| output += expect("iframe.contentWindow.scrollX", "500"); |
| output += expect("scrolledX < initialX", "true"); |
| delta = initialX - scrolledX; |
| output += expect("delta > 400 && delta < 600", "true"); |
| |
| debug(output); |
| finishJSTest(); |
| }, 0); |
| } |
| </script> |
| </body> |
| </html> |
| |
| |
