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- 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;
- };
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