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Simon Knott 2024-10-18 11:10:45 +02:00
parent 309bea0ea9
commit 5aae14e759
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GPG key ID: 8CEDC00028084AEC
1 changed files with 14 additions and 11 deletions
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25
packages/trace-viewer/src/sw/snapshotRenderer.ts
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@ -420,7 +420,7 @@ function snapshotScript(...targetIds: (string | undefined)[]) {
}
if (canvasElements.length > 0) {
function drawWarningBackground(context: CanvasRenderingContext2D, canvas: HTMLCanvasElement) {
function drawCheckerboard(context: CanvasRenderingContext2D, canvas: HTMLCanvasElement) {
function createCheckerboardPattern() {
const pattern = document.createElement('canvas');
pattern.width = pattern.width / Math.floor(pattern.width / 24);
@ -442,7 +442,7 @@ function snapshotScript(...targetIds: (string | undefined)[]) {
if (window.parent.parent !== window.parent) {
for (const canvas of canvasElements) {
const context = canvas.getContext('2d')!;
drawWarningBackground(context, canvas);
drawCheckerboard(context, canvas);
canvas.title = `Playwright displays canvas contents on a best-effort basis. It doesn't support canvas elements inside an iframe yet. If this impacts your workflow, please open an issue so we can prioritize.`;
}
return;
@ -459,27 +459,30 @@ function snapshotScript(...targetIds: (string | undefined)[]) {
const xEnd = boundingRect.right / window.innerWidth;
const yEnd = boundingRect.bottom / window.innerHeight;
drawWarningBackground(context, canvas);
drawCheckerboard(context, canvas);
const fullyUncaptured = xStart > 1 || yStart > 1;
if (fullyUncaptured) {
canvas.title = `Playwright couldn't capture canvas contents because it's located outside the viewport.`;
continue;
}
context.drawImage(img, xStart * img.width, yStart * img.height, (xEnd - xStart) * img.width, (yEnd - yStart) * img.height, 0, 0, canvas.width, canvas.height);
if (isUnderTest)
// eslint-disable-next-line no-console
console.log(`canvas drawn:`, JSON.stringify([xStart, yStart, xEnd, yEnd].map(v => Math.floor(v * 100))));
if (xEnd > 1 || yEnd > 1) {
if (xStart > 1 || yStart > 1)
canvas.title = `Playwright couldn't capture canvas contents because it's located outside the viewport.`;
else
canvas.title = `Playwright couldn't capture full canvas contents because it's located partially outside the viewport.`;
} else {
const partiallyUncaptured = xEnd > 1 || yEnd > 1;
if (partiallyUncaptured)
canvas.title = `Playwright couldn't capture full canvas contents because it's located partially outside the viewport.`;
else
canvas.title = `Canvas contents are displayed on a best-effort basis based on viewport screenshots taken during test execution.`;
}
}
};
img.onerror = () => {
for (const canvas of canvasElements) {
const context = canvas.getContext('2d')!;
drawWarningBackground(context, canvas);
drawCheckerboard(context, canvas);
canvas.title = `Playwright couldn't show canvas contents because the screenshot failed to load.`;
}
};