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vertical-scroll-touch-block-manual.tentative.html
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vertical-scroll-touch-block-manual.tentative.html
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<!doctype html>
<title>vertical-scroll test for touch-action</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/feature-policy/experimental-features/resources/common.js"></script>
<script src="/feature-policy/experimental-features/resources/vertical-scroll.js"></script>
<style>
html, body {
height: 100%;
width: 100%;
}
iframe {
width: 90%;
height: 90%;
margin: 0;
padding: 0;
}
.spacer {
width: 100%;
height: 100%;
margin: 100%;
}
</style>
<iframe></iframe>
<br/>
<p>Spacers below to make page scrollable</p>
<br/>
<div class="spacer"></div>
<div class="spacer"></div>
<p> EOF </p>
<script>
"use strict";
let url = url_base + "vertical-scroll-touch-block.html";
let iframeElement = document.querySelector("iframe");
// Wait for the helper scripts to load.
promise_test(async() => {
if (window.input_api_ready)
return Promise.resolve();
await new Promise( (r) => {
window.resolve_on_input_api_ready = r;
});
}, "Make sure input injection API is ready.");
// Sanity-check: Verify we can scroll using the test-API. The <iframe> with no
// query arguments would not preventDefault() any events.
promise_test(async() => {
window.scrollTo(0, 0);
await loadUrlInIframe(iframeElement, url);
await inject_scroll("down");
assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
await inject_scroll("right");
assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
}, "Verify that the page normally scrolls.");
// Enable 'vertical-scroll': Blocking "touchstart" can block scrolling.
promise_test(async() => {
window.scrollTo(0, 0);
setFeatureState(iframeElement, "vertical-scroll", "*");
await loadUrlInIframe(iframeElement, url);
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: true
});
await inject_scroll("down");
assert_equals(window.scrollY,
0,
"Main frame must not scroll vertically.");
}, "Calling 'preventDefault' on 'touchstart' blocks vertical scroll when " +
" the feature is enabled.");
// Disable 'vertical-scroll': Blocking "touchstart" cannot block vertical
// scroll.
promise_test(async() => {
window.scrollTo(0, 0);
setFeatureState(iframeElement, "vertical-scroll", "'none'");
await loadUrlInIframe(iframeElement, url);
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: true
});
await inject_scroll("down");
assert_greater_than(window.scrollY,
0,
"Main frame must scroll vertically.");
// Horizontal scrolling must still be blocked.
window.scrollTo(0, 0);
await inject_scroll("right");
assert_equals(window.scrollX,
0,
"Main frame must not scroll horizontally.");
}, "When feature is disabled, calling 'preventDefault' on 'touchstart' does" +
" not block vertical scroll, but still bocks horizontal scroll.");
// Enable 'vertical-scroll': Blocking "touchmove" can block scrolling.
promise_test(async() => {
// Make sure <window> can scroll both towards right and bottom.
window.scrollTo(0, 0);
setFeatureState(iframeElement, "vertical-scroll", "*");
await loadUrlInIframe(iframeElement, url);
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchmove",
query: "#blocker",
prevent: true
});
await inject_scroll("down");
assert_equals(window.scrollY,
0,
"Main frame must not scroll vertically");
}, "Calling 'preventDefault' on 'touchmove' blocks vertical scroll when " +
"the feature is enabled.");
// Disable 'vertical-scroll': Blocking "touchmove" cannot block vertical
// scroll.
promise_test(async() => {
window.scrollTo(0, 0);
setFeatureState(iframeElement, "vertical-scroll", "'none'");
await loadUrlInIframe(iframeElement, url);
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchmove",
query: "#blocker",
prevent: true
});
await new Promise((r) => {
window.setTimeout(r, 100);
});
await inject_scroll("down");
assert_greater_than(window.scrollY,
0,
"Main frame must scroll vertically.");
}, "When feature is disabled, calling 'preventDefault' on 'touchmove' does" +
" not block vertical scroll.");
// Disable 'vertical-scroll': Add a non-preventing handler, and then a
// preventing handler and verify vertical scroll is possible and horizontal
// is blocked.
promise_test(async() => {
setFeatureState(iframeElement, "vertical-scroll", "'none'");
await loadUrlInIframe(iframeElement, url);
// Add a non-blocking handler.
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: false
});
window.scrollTo(0, 0);
await inject_scroll("down");
assert_greater_than(window.scrollY, 0, "Page must have scrolled down.");
window.scrollTo(0, 0);
await inject_scroll("right");
assert_greater_than(window.scrollX, 0, "Page must have scrolled right.");
// Add a blocking handler.
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: true
});
window.scrollTo(0, 0);
await inject_scroll("down");
assert_greater_than(window.scrollY,
0,
"Page must have scrolled down (preventing handler).");
window.scrollTo(0, 0);
await inject_scroll("right");
assert_equals(window.scrollX,
0,
"Page must not have scrolled horizontally.");
}, "Verify that starting with a non-preventing listener and then switching" +
" to a preventing one works as intended.");
// Disable 'vertical-scroll': A preventing 'touchstart' handler does not allow
// other multi-touch actions such as 'pinch-zoom'.
promise_test(async() => {
assert_true(!!window.visualViewport,
"'visualViewport' is needed for this test.");
setFeatureState(iframeElement, "vertical-scroll", "'none'");
await loadUrlInIframe(iframeElement, url);
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: false
});
// Sanity check: Pinch zoom in should work since 'touchstart' is not
// preventing.
let current_scale_factor = window.visualViewport.scale;
await inject_zoom("in");
let new_scale_factor = window.visualViewport.scale;
assert_greater_than(
new_scale_factor,
current_scale_factor,
"Pinch zoom should work since 'touchstart' is not prevented.");
// Add a preventing handler and verify pinch zoom is now blocked.
await sendMessageAndGetResponse(iframeElement.contentWindow,
{
event_type: "touchstart",
query: "#blocker",
prevent: true
});
current_scale_factor = new_scale_factor;
await inject_zoom("out");
new_scale_factor = window.visualViewport.scale;
assert_equals(
new_scale_factor,
current_scale_factor,
"Pinch zoom must be blocked.");
}, "Verify that pinch zoom is blocked in frames with 'vertical-scroll' none'" +
" where 'touchstart' is prevent defaulted.");
</script>