| <html> |
| <body> |
| <script src="../../resources/js-test.js"></script> |
| <script> |
| description("This test ensures that document content width (height) as reported by scrollWidth (scrollHeight) is invariant to changes in page scale factor."); |
| |
| if (window.internals) |
| internals.settings.setMockScrollbarsEnabled(true); |
| |
| var body = document.body; |
| |
| // According to CSSOM (http://dev.w3.org/csswg/cssom-view/#dom-element-scrollwidth) |
| // the scrollWidth of the body element (in Quirks mode) is defined as |
| // max(document content width, value of innerWidth). |
| // In this test, we want to measure the document content width (height), |
| // rather than innerWidth (innerHeight), so we make the body element |
| // larger than the innerWidth (innerHeight). |
| |
| body.style["width"] = window.innerWidth + 100 + "px"; |
| body.style["height"] = window.innerHeight + 100 + "px"; |
| |
| var originalScrollWidth = body.scrollWidth; |
| var originalScrollHeight = body.scrollHeight; |
| |
| var scale = 1.1; |
| if (window.eventSender) |
| internals.setPageScaleFactor(scale); |
| |
| // As we have increased the scale factor, the innerWidth will be less |
| // as fewer CSS pixels will be rendered in the same viewport, so |
| // body.scrollWidth (scrollHeight) will still be measuring the document |
| // content width (height). |
| |
| shouldBe("body.scrollWidth", "originalScrollWidth"); |
| shouldBe("body.scrollHeight", "originalScrollHeight"); |
| </script> |
| </body> |
| </html> |
