LayoutTests/accessibility/mac/custom-text-editor.html

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta charset="utf-8">
<script src="../../resources/accessibility-helper.js"></script>
<script src="../../resources/js-test.js"></script>
</head>
<body>

<textarea autofocus id="text" role="textbox">Text😀area with custom cursor handling</textarea>

<script>
var output = "Tests that we infer intents when JS is used to move the cursor in a text editor; this practice is common in online code editors.\n\n";

const AXTextStateChangeTypeSelectionMove = 2;
const AXTextStateChangeTypeSelectionExtend = AXTextStateChangeTypeSelectionMove + 1;

const AXTextSelectionDirectionBeginning = 1;
const AXTextSelectionDirectionEnd = AXTextSelectionDirectionBeginning + 1;
const AXTextSelectionDirectionPrevious = AXTextSelectionDirectionEnd + 1;
const AXTextSelectionDirectionNext = AXTextSelectionDirectionPrevious + 1;
const AXTextSelectionDirectionDiscontiguous = AXTextSelectionDirectionNext + 1;

const AXTextSelectionGranularityCharacter = 1;

function notificationCallback(notification, userInfo) {
    if (notification != "AXSelectedTextChanged")
        return;

    let str = "";
    let type = userInfo["AXTextStateChangeType"];
    if (type == AXTextStateChangeTypeSelectionMove)
        str += "move";

    let dir = userInfo["AXTextSelectionDirection"];
    if (dir == AXTextSelectionDirectionNext)
        str += " next";
    else if (dir == AXTextSelectionDirectionPrevious)
        str += " previous";
    else if (dir == AXTextSelectionDirectionDiscontiguous)
        str += " discontiguous";

    let granularity = userInfo["AXTextSelectionGranularity"];
    if (granularity == AXTextSelectionGranularityCharacter)
        str += " character";

    str += "\n";
    output += str;

    if (resolveNotificationPromise)
        resolveNotificationPromise();
}

async function moveAndWaitForNotification(offset) {
    text = document.getElementById("text");
    output += "Move to " + offset + "\n";
    let promise = new Promise((resolve, reject) => {
        resolveNotificationPromise = resolve;
    });
    text.setSelectionRange(offset, offset);
    await promise;
    resolveNotificationPromise = null;
}

if (window.accessibilityController) {
    window.jsTestIsAsync = true;

    accessibilityController.enableEnhancedAccessibility(true);

    webArea = accessibilityController.rootElement.childAtIndex(0);
    var addedNotification = webArea.addNotificationListener(notificationCallback);
    output += expect("addedNotification", "true");

    setTimeout(async function() {
        await moveAndWaitForNotification(0);
        await moveAndWaitForNotification(1);
        await moveAndWaitForNotification(2);
        await moveAndWaitForNotification(3);
        await moveAndWaitForNotification(4);

        await moveAndWaitForNotification(6);  // Note single character (emoji)

        await moveAndWaitForNotification(8);  // Discontiguous
        await moveAndWaitForNotification(9);

        debug(output);
        finishJSTest();
    }, 0);
}
</script>
</body>
</html>