'use strict';
const MS_PER_SEC = 1000;
// The recommended minimum precision to use for time values[1].
//
// [1] https://drafts.csswg.org/web-animations/#precision-of-time-values
const TIME_PRECISION = 0.0005; // ms
// Allow implementations to substitute an alternative method for comparing
// times based on their precision requirements.
if (!window.assert_times_equal) {
window.assert_times_equal = (actual, expected, description) => {
assert_approx_equals(actual, expected, TIME_PRECISION * 2, description);
};
}
// Allow implementations to substitute an alternative method for comparing
// times based on their precision requirements.
if (!window.assert_time_greater_than_equal) {
window.assert_time_greater_than_equal = (actual, expected, description) => {
assert_greater_than_equal(actual, expected - 2 * TIME_PRECISION,
description);
};
}
// Allow implementations to substitute an alternative method for comparing
// a time value based on its precision requirements with a fixed value.
if (!window.assert_time_equals_literal) {
window.assert_time_equals_literal = (actual, expected, description) => {
if (Math.abs(expected) === Infinity) {
assert_equals(actual, expected, description);
} else {
assert_approx_equals(actual, expected, TIME_PRECISION, description);
}
}
}
// creates div element, appends it to the document body and
// removes the created element during test cleanup
function createDiv(test, doc) {
return createElement(test, 'div', doc);
}
// creates element of given tagName, appends it to the document body and
// removes the created element during test cleanup
// if tagName is null or undefined, returns div element
function createElement(test, tagName, doc) {
if (!doc) {
doc = document;
}
const element = doc.createElement(tagName || 'div');
doc.body.appendChild(element);
test.add_cleanup(() => {
element.remove();
});
return element;
}
// Creates a style element with the specified rules, appends it to the document
// head and removes the created element during test cleanup.
// |rules| is an object. For example:
// { '@keyframes anim': '' ,
// '.className': 'animation: anim 100s;' };
// or
// { '.className1::before': 'content: ""; width: 0px; transition: all 10s;',
// '.className2::before': 'width: 100px;' };
// The object property name could be a keyframes name, or a selector.
// The object property value is declarations which are property:value pairs
// split by a space.
function createStyle(test, rules, doc) {
if (!doc) {
doc = document;
}
const extraStyle = doc.createElement('style');
doc.head.appendChild(extraStyle);
if (rules) {
const sheet = extraStyle.sheet;
for (const selector in rules) {
sheet.insertRule(`${selector}{${rules[selector]}}`,
sheet.cssRules.length);
}
}
test.add_cleanup(() => {
extraStyle.remove();
});
}
// Cubic bezier with control points (0, 0), (x1, y1), (x2, y2), and (1, 1).
function cubicBezier(x1, y1, x2, y2) {
const xForT = t => {
const omt = 1-t;
return 3 * omt * omt * t * x1 + 3 * omt * t * t * x2 + t * t * t;
};
const yForT = t => {
const omt = 1-t;
return 3 * omt * omt * t * y1 + 3 * omt * t * t * y2 + t * t * t;
};
const tForX = x => {
// Binary subdivision.
let mint = 0, maxt = 1;
for (let i = 0; i < 30; ++i) {
const guesst = (mint + maxt) / 2;
const guessx = xForT(guesst);
if (x < guessx) {
maxt = guesst;
} else {
mint = guesst;
}
}
return (mint + maxt) / 2;
};
return x => {
if (x == 0) {
return 0;
}
if (x == 1) {
return 1;
}
return yForT(tForX(x));
};
}
function stepEnd(nsteps) {
return x => Math.floor(x * nsteps) / nsteps;
}
function stepStart(nsteps) {
return x => {
const result = Math.floor(x * nsteps + 1.0) / nsteps;
return (result > 1.0) ? 1.0 : result;
};
}
function waitForAnimationFrames(frameCount) {
return new Promise(resolve => {
function handleFrame() {
if (--frameCount <= 0) {
resolve();
} else {
window.requestAnimationFrame(handleFrame); // wait another frame
}
}
window.requestAnimationFrame(handleFrame);
});
}
// Continually calls requestAnimationFrame until |minDelay| has elapsed
// as recorded using document.timeline.currentTime (i.e. frame time not
// wall-clock time).
function waitForAnimationFramesWithDelay(minDelay) {
const startTime = document.timeline.currentTime;
return new Promise(resolve => {
(function handleFrame() {
if (document.timeline.currentTime - startTime >= minDelay) {
resolve();
} else {
window.requestAnimationFrame(handleFrame);
}
}());
});
}
function runAndWaitForFrameUpdate(callback) {
return new Promise(resolve => {
window.requestAnimationFrame(() => {
callback();
window.requestAnimationFrame(resolve);
});
});
}
// Waits for a requestAnimationFrame callback in the next refresh driver tick.
function waitForNextFrame() {
const timeAtStart = document.timeline.currentTime;
return new Promise(resolve => {
(function handleFrame() {
if (timeAtStart === document.timeline.currentTime) {
window.requestAnimationFrame(handleFrame);
} else {
resolve();
}
}());
});
}
async function insertFrameAndAwaitLoad(test, iframe, doc) {
const eventWatcher = new EventWatcher(test, iframe, ['load']);
const event_promise = eventWatcher.wait_for('load');
doc.body.appendChild(iframe);
test.add_cleanup(() => { doc.body.removeChild(iframe); });
await event_promise;
}
// Returns 'matrix()' or 'matrix3d()' function string generated from an array.
function createMatrixFromArray(array) {
return (array.length == 16 ? 'matrix3d' : 'matrix') + `(${array.join()})`;
}
// Returns 'matrix3d()' function string equivalent to
// 'rotate3d(x, y, z, radian)'.
function rotate3dToMatrix3d(x, y, z, radian) {
return createMatrixFromArray(rotate3dToMatrix(x, y, z, radian));
}
// Returns an array of the 4x4 matrix equivalent to 'rotate3d(x, y, z, radian)'.
// https://drafts.csswg.org/css-transforms-2/#Rotate3dDefined
function rotate3dToMatrix(x, y, z, radian) {
const sc = Math.sin(radian / 2) * Math.cos(radian / 2);
const sq = Math.sin(radian / 2) * Math.sin(radian / 2);
// Normalize the vector.
const length = Math.sqrt(x*x + y*y + z*z);
x /= length;
y /= length;
z /= length;
return [
1 - 2 * (y*y + z*z) * sq,
2 * (x * y * sq + z * sc),
2 * (x * z * sq - y * sc),
0,
2 * (x * y * sq - z * sc),
1 - 2 * (x*x + z*z) * sq,
2 * (y * z * sq + x * sc),
0,
2 * (x * z * sq + y * sc),
2 * (y * z * sq - x * sc),
1 - 2 * (x*x + y*y) * sq,
0,
0,
0,
0,
1
];
}
// Compare matrix string like 'matrix(1, 0, 0, 1, 100, 0)' with tolerances.
function assert_matrix_equals(actual, expected, description) {
const matrixRegExp = /^matrix(?:3d)*\((.+)\)/;
assert_regexp_match(actual, matrixRegExp,
'Actual value is not a matrix')
assert_regexp_match(expected, matrixRegExp,
'Expected value is not a matrix');
const actualMatrixArray =
actual.match(matrixRegExp)[1].split(',').map(Number);
const expectedMatrixArray =
expected.match(matrixRegExp)[1].split(',').map(Number);
assert_equals(actualMatrixArray.length, expectedMatrixArray.length,
`dimension of the matrix: ${description}`);
for (let i = 0; i < actualMatrixArray.length; i++) {
assert_approx_equals(actualMatrixArray[i], expectedMatrixArray[i], 0.0001,
`expected ${expected} but got ${actual}: ${description}`);
}
}
// Compare rotate3d vector like '0 1 0 45deg' with tolerances.
function assert_rotate3d_equals(actual, expected, description) {
const rotationRegExp =/^((([+-]?\d+(\.+\d+)?\s){3})?\d+(\.+\d+)?)deg/;
assert_regexp_match(actual, rotationRegExp,
'Actual value is not a rotate3d vector')
assert_regexp_match(expected, rotationRegExp,
'Expected value is not a rotate3d vector');
const actualRotationVector =
actual.match(rotationRegExp)[1].split(' ').map(Number);
const expectedRotationVector =
expected.match(rotationRegExp)[1].split(' ').map(Number);
assert_equals(actualRotationVector.length, expectedRotationVector.length,
`dimension of the matrix: ${description}`);
for (let i = 0; i < actualRotationVector.length; i++) {
assert_approx_equals(
actualRotationVector[i],
expectedRotationVector[i],
0.0001,
`expected ${expected} but got ${actual}: ${description}`);
}
}
function assert_phase_at_time(animation, phase, currentTime) {
animation.currentTime = currentTime;
assert_phase(animation, phase);
}
function assert_phase(animation, phase) {
const fillMode = animation.effect.getTiming().fill;
const currentTime = animation.currentTime;
if (phase === 'active') {
// If the fill mode is 'none', then progress will only be non-null if we
// are in the active phase.
animation.effect.updateTiming({ fill: 'none' });
assert_not_equals(animation.effect.getComputedTiming().progress, null,
'Animation effect is in active phase when current time ' +
`is ${currentTime}.`);
} else {
// The easiest way to distinguish between the 'before' phase and the 'after'
// phase is to toggle the fill mode. For example, if the progress is null
// when the fill mode is 'none' but non-null when the fill mode is
// 'backwards' then we are in the before phase.
animation.effect.updateTiming({ fill: 'none' });
assert_equals(animation.effect.getComputedTiming().progress, null,
`Animation effect is in ${phase} phase when current time ` +
`is ${currentTime} (progress is null with 'none' fill mode)`);
animation.effect.updateTiming({
fill: phase === 'before' ? 'backwards' : 'forwards',
});
assert_not_equals(animation.effect.getComputedTiming().progress, null,
`Animation effect is in ${phase} phase when current ` +
`time is ${currentTime} (progress is non-null with ` +
`appropriate fill mode)`);
}
// Reset fill mode to avoid side-effects.
animation.effect.updateTiming({ fill: fillMode });
}
// Use with reftest-wait to wait until compositor commits are no longer deferred
// before taking the screenshot.
// crbug.com/1378671
async function waitForCompositorReady() {
const animation =
document.body.animate({ opacity: [ 0, 1 ] }, {duration: 1 });
return animation.finished;
}
async function takeScreenshotOnAnimationsReady() {
await Promise.all(document.getAnimations().map(a => a.ready));
requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
}
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