Source/WebCore/html/TextMetrics.idl

/*
 * Copyright (C) 2008-2023 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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// https://html.spec.whatwg.org/multipage/canvas.html#textmetrics

[
    Exposed=(Window,Worker),
] interface TextMetrics {
    // x-direction
    readonly attribute double width; // advance width
    readonly attribute double actualBoundingBoxLeft;
    readonly attribute double actualBoundingBoxRight;

    // y-direction
    readonly attribute double fontBoundingBoxAscent;
    readonly attribute double fontBoundingBoxDescent;
    readonly attribute double actualBoundingBoxAscent;
    readonly attribute double actualBoundingBoxDescent;
    readonly attribute double emHeightAscent;
    readonly attribute double emHeightDescent;
    readonly attribute double hangingBaseline;
    readonly attribute double alphabeticBaseline;
    readonly attribute double ideographicBaseline;
};