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/* Any copyright is dedicated to the Public Domain.
/* import-globals-from clipboard_helper.js */
"use strict";
function getLoadContext() {
return SpecialPowers.wrap(window).docShell.QueryInterface(Ci.nsILoadContext);
}
/* toBase64 copied from extensions/xml-rpc/src/nsXmlRpcClient.js */
/* Convert data (an array of integers) to a Base64 string. */
const toBase64Table =
// eslint-disable-next-line no-useless-concat
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789+/";
const base64Pad = "=";
function toBase64(data) {
var result = "";
var length = data.length;
var i;
// Convert every three bytes to 4 ascii characters.
for (i = 0; i < length - 2; i += 3) {
result += toBase64Table[data[i] >> 2];
result += toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];
result += toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)];
result += toBase64Table[data[i + 2] & 0x3f];
}
// Convert the remaining 1 or 2 bytes, pad out to 4 characters.
if (length % 3) {
i = length - (length % 3);
result += toBase64Table[data[i] >> 2];
if (length % 3 == 2) {
result += toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];
result += toBase64Table[(data[i + 1] & 0x0f) << 2];
result += base64Pad;
} else {
result += toBase64Table[(data[i] & 0x03) << 4];
result += base64Pad + base64Pad;
}
}
return result;
}
// Get clipboard data to paste.
function getPNGFromClipboard(clipboard) {
let trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(
Ci.nsITransferable
);
trans.init(getLoadContext());
trans.addDataFlavor("image/png");
clipboard.getData(
trans,
Ci.nsIClipboard.kGlobalClipboard,
SpecialPowers.wrap(window).browsingContext.currentWindowContext
);
let obj = SpecialPowers.createBlankObject();
trans.getTransferData("image/png", obj);
let rawStream = obj.value.QueryInterface(Ci.nsIInputStream);
let stream = Cc["@mozilla.org/binaryinputstream;1"].createInstance();
stream.QueryInterface(Ci.nsIBinaryInputStream);
stream.setInputStream(rawStream);
var bytes = stream.readByteArray(stream.available()); // returns int[]
var base64String = toBase64(bytes);
return "data:image/png;base64," + base64String;
}
async function putOnClipboard(expected, operationFn, desc, type) {
try {
await SimpleTest.promiseClipboardChange(expected, operationFn, type, 1000);
} catch (e) {
throw new Error(`Failed "${desc}" due to "${e.toString()}"`);
}
}
add_setup(function init() {
cleanupAllClipboard();
});
add_task(async function test_copy() {
// Copy the image's data to the clipboard
await SpecialPowers.pushPrefEnv({
set: [["clipboard.copy_image.as_png", true]],
});
try {
await putOnClipboard(
"",
() => {
SpecialPowers.setCommandNode(
window,
document.getElementById("pngWithTransparency")
);
SpecialPowers.doCommand(window, "cmd_copyImageContents");
},
"copy changed clipboard when preference is disabled"
);
} catch (e) {
ok(false, e.toString());
}
// Get the data from the clipboard
let dataURLString = getPNGFromClipboard(clipboard);
let targetPng = document.getElementById("targetPng");
targetPng.src = dataURLString;
await new Promise(resolve => {
targetPng.addEventListener(
"load",
() => {
resolve();
},
{ once: true }
);
});
// Make sure the resulting PNG has transparency
// by drawing on a canvas
let canvas = document.getElementById("targetCanvas");
let ctx = canvas.getContext("2d");
// The image is transparent in the top left corner.
// Fill the canvas with a color that is not in the image
ctx.fillStyle = "rgb(10, 30, 230)";
ctx.fillRect(0, 0, 200, 200);
ctx.drawImage(targetPng, 0, 0);
let imageData = ctx.getImageData(0, 0, 1, 1);
// getImageData() returns in RGBA order
is(imageData.data[0], 10, "R value should not have changed");
is(imageData.data[1], 30, "G value should not have changed");
is(imageData.data[2], 230, "B value should not have changed");
cleanupAllClipboard();
await SpecialPowers.popPrefEnv();
});