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Add ability to set CSS classes instead of inline styles (#103)

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* Add ability to set CSS classes instead of inline styles

This allows to set a `ClassName` field in `Style` structs. Setting this
field to anything but "" will cause all other styles to be ignored. The
element will then have a `class=` tag instead with the corresponding name.

Possible reasons to use this:
* Including multiple SVGs on the same webside, using the same styles
* Desire to use strict CSP headers

* Add warning that setting `ClassName` will drop all other inline styles
This commit is contained in:
Justin Kromlinger 2018-10-12 02:21:46 +02:00 • committed by Will Charczuk
parent 6735e8990a
commit f97f94425f
6 changed files with 120 additions and 7 deletions
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14
vector_renderer_test.go
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@ -71,7 +71,21 @@ func TestCanvasStyleSVG(t *testing.T) {
svgString := canvas.styleAsSVG(set)
assert.NotEmpty(svgString)
assert.True(strings.HasPrefix(svgString, "style=\""))
assert.True(strings.Contains(svgString, "stroke:rgba(255,255,255,1.0)"))
assert.True(strings.Contains(svgString, "stroke-width:5"))
assert.True(strings.Contains(svgString, "fill:rgba(255,255,255,1.0)"))
assert.True(strings.HasSuffix(svgString, "\""))
}
func TestCanvasClassSVG(t *testing.T) {
as := assert.New(t)
set := Style{
ClassName: "test-class",
}
canvas := &canvas{dpi: DefaultDPI}
as.Equal("class=\"test-class\"", canvas.styleAsSVG(set))
}