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2022-11-28 11:46:21AM

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Alexander Wang 2022-11-28 11:46:21 -08:00
parent 33b7fbaa9e
commit 922d9c0ca7
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GPG key ID: D89FA31966BDBECE
2 changed files with 9 additions and 5 deletions
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12
d2renderers/d2latex/latex.go
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@ -13,6 +13,8 @@ import (
v8 "rogchap.com/v8go"
)
var pxPerEx = 8
//go:embed polyfills.js
var polyfillsJS string
@ -22,6 +24,8 @@ var setupJS string
//go:embed mathjax.js
var mathjaxJS string
// Matches this
// <svg style="background: white;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="563" height="326" viewBox="-100 -100 563 326"><style type="text/css">
var svgRe = regexp.MustCompile(`<svg[^>]+width="([0-9\.]+)ex" height="([0-9\.]+)ex"[^>]+>`)
func Render(s string) (_ string, err error) {
@ -41,9 +45,9 @@ func Render(s string) (_ string, err error) {
}
val, err := v8ctx.RunScript(fmt.Sprintf(`adaptor.innerHTML(html.convert("%s", {
em: 16,
ex: 8,
}))`, s), "value.js")
em: %d,
ex: %d,
}))`, s, pxPerEx*2, pxPerEx), "value.js")
if err != nil {
return "", err
}
@ -75,5 +79,5 @@ func Measure(s string) (width, height int, err error) {
return 0, 0, fmt.Errorf("svg parsing failed for latex: %v", svg)
}
return int(math.Ceil(wf * 8)), int(math.Ceil(hf * 8)), nil
return int(math.Ceil(wf * float64(pxPerEx))), int(math.Ceil(hf * float64(pxPerEx))), nil
}

2
d2renderers/d2latex/latex_test.go
View file

@ -25,6 +25,6 @@ func TestRender(t *testing.T) {
func TestRenderError(t *testing.T) {
_, err := Render(`\frac{1}{2}`)
if err == nil {
t.Fatal(err)
t.Fatal("expected to error on invalid latex syntax")
}
}