novasvg::ForeignObjectMetrics Struct Reference

Metrics for how ForeignObjectSimple::render() will lay out and size a <foreignObject>'s content, computed WITHOUT actually rendering it. More...

#include <svgelement.h>

Public Attributes
float	height = 0.f
	Total height ForeignObjectSimple::render() will use for this content, in pixels.
float	width = 0.f
	Widest line, per Font::measureText() – see this struct's own field-level note above measureForeignObjectContent() for why this is NOT what render() itself uses to size anything.
int	lineCount = 0
	Number of lines wrapForeignObjectText() splits this content into.
float	lineHeight = 0.f
	Per-line height (from the content's own inline line-height:, or font.height() * 1.2).

Detailed Description

Metrics for how ForeignObjectSimple::render() will lay out and size a <foreignObject>'s content, computed WITHOUT actually rendering it.

Exists so a caller building the SVG in the first place (i.e. before any SVGForeignObjectElement exists to query) – e.g. mermaid.js's own layout pass, run headless inside mermaidx's QuickJS/V8 DOM shim, computing a node box's height to fit a multi-line HTML label – can ask novasvg itself what height that content will need, rather than reimplementing (and risking drifting out of sync with) the line-counting/line-height logic ForeignObjectSimple::render() uses at actual paint time. See measureForeignObjectContent() below.

Definition at line 6917 of file svgelement.h.

Member Data Documentation

height

float novasvg::ForeignObjectMetrics::height = 0.f

Total height ForeignObjectSimple::render() will use for this content, in pixels.

Definition at line 6918 of file svgelement.h.

Referenced by novasvg::measureForeignObjectSegments().

lineCount

int novasvg::ForeignObjectMetrics::lineCount = 0

Number of lines wrapForeignObjectText() splits this content into.

Definition at line 6920 of file svgelement.h.

Referenced by novasvg::measureForeignObjectSegments().

lineHeight

float novasvg::ForeignObjectMetrics::lineHeight = 0.f

Per-line height (from the content's own inline line-height:, or font.height() * 1.2).

Definition at line 6921 of file svgelement.h.

Referenced by novasvg::measureForeignObjectSegments().

width

float novasvg::ForeignObjectMetrics::width = 0.f

Widest line, per Font::measureText() – see this struct's own field-level note above measureForeignObjectContent() for why this is NOT what render() itself uses to size anything.

Definition at line 6919 of file svgelement.h.

Referenced by novasvg::measureForeignObjectSegments().

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The documentation for this struct was generated from the following file:

• /home/runner/work/novasvg/novasvg/include/novasvg/detail/svgelement.h