| <!doctype HTML> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script src="./resources/resizeTestHelper.js"></script> |
| <body></body> |
| |
| <script> |
| 'use strict'; |
| |
| // allow uncaught exception because ResizeObserver posts exceptions |
| // to window error handler when limit is exceeded. |
| setup({allow_uncaught_exception: true}); |
| |
| function test() { |
| let t = document.createElement("div"); |
| document.body.appendChild(t); |
| t.style.height = "25.25px"; |
| t.style.width = "55.5px"; |
| document.body.style.zoom = 1; |
| let helper = new ResizeTestHelper( |
| "An observation is fired when device-pixel-content-box is being " + |
| "observed and sub pixel values are used", |
| [ |
| { |
| setup: observer => { |
| observer.observe(t, {box: "device-pixel-content-box"}); |
| }, |
| notify: entries => { |
| assert_equals(entries.length, 1, "1 pending notification"); |
| assert_equals(entries[0].target, t, "target is t"); |
| assert_equals(entries[0].contentRect.width, 55.5, "target width"); |
| assert_equals(entries[0].contentRect.height, 25.25, "target height"); |
| assert_equals(entries[0].contentBoxSize[0].inlineSize, 55.5, |
| "target content-box inline size"); |
| assert_equals(entries[0].contentBoxSize[0].blockSize, 25.25, |
| "target content-box block size"); |
| assert_equals(entries[0].borderBoxSize[0].inlineSize, 55.5, |
| "target border-box inline size"); |
| assert_equals(entries[0].borderBoxSize[0].blockSize, 25.25, |
| "target border-box block size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].inlineSize, 56, |
| "target device-pixel-content-box inline size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].blockSize, 25, |
| "target device-pixel-content-box block size"); |
| } |
| }, |
| { |
| setup: observer => { |
| t.style.marginLeft = "10.5px" |
| }, |
| notify: entries => { |
| assert_equals(entries.length, 1, "1 pending notification"); |
| assert_equals(entries[0].target, t, "target is t"); |
| assert_equals(entries[0].contentRect.width, 55.5, "target width"); |
| assert_equals(entries[0].contentRect.height, 25.25, "target height"); |
| assert_equals(entries[0].contentBoxSize[0].inlineSize, 55.5, |
| "target content-box inline size"); |
| assert_equals(entries[0].contentBoxSize[0].blockSize, 25.25, |
| "target content-box block size"); |
| assert_equals(entries[0].borderBoxSize[0].inlineSize, 55.5, |
| "target border-box inline size"); |
| assert_equals(entries[0].borderBoxSize[0].blockSize, 25.25, |
| "target border-box block size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].inlineSize, 55, |
| "target device-pixel-content-box inline size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].blockSize, 25, |
| "target device-pixel-content-box block size"); |
| } |
| }, |
| { |
| setup: observer => { |
| document.body.style.zoom = 3; |
| }, |
| notify: entries => { |
| assert_equals(entries.length, 1, "1 pending notification"); |
| assert_equals(entries[0].target, t, "target is t"); |
| assert_equals(entries[0].contentRect.width, 55.5, "target width"); |
| assert_equals(entries[0].contentRect.height, 25.25, "target height"); |
| assert_equals(entries[0].contentBoxSize[0].inlineSize, 55.5, |
| "target content-box inline size"); |
| assert_equals(entries[0].contentBoxSize[0].blockSize, 25.25, |
| "target content-box block size"); |
| assert_equals(entries[0].borderBoxSize[0].inlineSize, 55.5, |
| "target content-box inline size"); |
| assert_equals(entries[0].borderBoxSize[0].blockSize, 25.25, |
| "target content-box block size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].inlineSize, 166, |
| "target content-box inline size"); |
| assert_equals(entries[0].devicePixelContentBoxSize[0].blockSize, 76, |
| "target content-box block size"); |
| } |
| } |
| ]); |
| |
| return helper.start(() => t.remove()); |
| } |
| |
| function test2() { |
| // Ensure a resize observer callback that triggers only layout does not crash |
| // the browser |
| |
| let c = document.createElement('canvas'); |
| let a = document.createElement('div'); |
| a.style.height = '10px'; |
| a.style.width = '20px'; |
| c.width = "500"; |
| c.height = "500"; |
| document.body.appendChild(c); |
| document.body.appendChild(a); |
| |
| let helper = new ResizeTestHelper( |
| "Resize observer callback triggers layout without style change", |
| [ |
| { |
| setup: observer => { |
| observer.observe(a, { box: "border-box" }); |
| }, |
| notify: entries => { |
| |
| } |
| }, |
| { |
| setup: observer => { |
| a.style.width = '50px'; |
| }, |
| notify: entries => { |
| c.height = "100"; |
| assert_equals(entries.length, 1, "1 pending notification"); |
| assert_equals(entries[0].target, a, "target is t"); |
| assert_equals(entries[0].contentRect.width, 50, "target width"); |
| assert_equals(entries[0].contentRect.height, 10, "target height"); |
| assert_equals(entries[0].borderBoxSize[0].inlineSize, 50, |
| "target border-box inline size"); |
| assert_equals(entries[0].borderBoxSize[0].blockSize, 10, |
| "target border-box block size"); |
| } |
| }, |
| ]); |
| return helper.start(() => assert_equals(c.height, 100, |
| "canvas height")); |
| } |
| |
| test(); |
| test2(); |
| |
| </script> |
