gecko-dev/testing/web-platform/tests/interfaces/font-metrics-api.idl

// GENERATED CONTENT - DO NOT EDIT
// Content was automatically extracted by Reffy into reffy-reports
// (https://github.com/tidoust/reffy-reports)
// Source: Font Metrics API Level 1 (https://drafts.css-houdini.org/font-metrics-api/)

partial interface Document {
    FontMetrics measureElement(Element element);
    FontMetrics measureText(DOMString text, StylePropertyMapReadOnly styleMap);
};

interface FontMetrics {
  readonly attribute double width;
  readonly attribute FrozenArray<double> advances;

  readonly attribute double boundingBoxLeft;
  readonly attribute double boundingBoxRight;

  readonly attribute double height;
  readonly attribute double emHeightAscent;
  readonly attribute double emHeightDescent;
  readonly attribute double boundingBoxAscent;
  readonly attribute double boundingBoxDescent;
  readonly attribute double fontBoundingBoxAscent;
  readonly attribute double fontBoundingBoxDescent;

  readonly attribute Baseline dominantBaseline;
  readonly attribute FrozenArray<Baseline> baselines;
  readonly attribute FrozenArray<Font> fonts;
};

interface Baseline {
  readonly attribute DOMString name;
  readonly attribute double value;
};

interface Font {
  readonly attribute DOMString name;
  readonly attribute unsigned long glyphsRendered;
};