mrcharles
10e930e46d
Go CLI that turns the markdown currency of this stack (Redmine notes, Discourse posts, briefing output) into typeset PDFs: two embedded typst templates (report with title page/TOC/headers, dense brief), front-matter (title/subtitle/author/date/classification/template), GFM tables, and bar charts rendered in pure Go (go-chart) from fenced chart data blocks. Engine is a prebuilt typst 0.15.1 container pinned by digest and run --network none; PDF bytes to stdout or -o. Exit codes 0/1/2. All dev in docker (dev.sh/Makefile); unit tests + golden typst fixtures plus a host-side smoke against the real engine container. Generated with Crush Assisted-by: Crush:glm-5.2
90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
package drawing
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// NewDashVertexConverter creates a new dash converter.
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func NewDashVertexConverter(dash []float64, dashOffset float64, flattener Flattener) *DashVertexConverter {
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var dasher DashVertexConverter
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dasher.dash = dash
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dasher.currentDash = 0
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dasher.dashOffset = dashOffset
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dasher.next = flattener
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return &dasher
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}
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// DashVertexConverter is a converter for dash vertexes.
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type DashVertexConverter struct {
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next Flattener
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x, y, distance float64
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dash []float64
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currentDash int
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dashOffset float64
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}
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// LineTo implements the pathbuilder interface.
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func (dasher *DashVertexConverter) LineTo(x, y float64) {
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dasher.lineTo(x, y)
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}
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// MoveTo implements the pathbuilder interface.
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func (dasher *DashVertexConverter) MoveTo(x, y float64) {
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dasher.next.MoveTo(x, y)
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dasher.x, dasher.y = x, y
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dasher.distance = dasher.dashOffset
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dasher.currentDash = 0
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}
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// LineJoin implements the pathbuilder interface.
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func (dasher *DashVertexConverter) LineJoin() {
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dasher.next.LineJoin()
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}
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// Close implements the pathbuilder interface.
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func (dasher *DashVertexConverter) Close() {
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dasher.next.Close()
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}
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// End implements the pathbuilder interface.
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func (dasher *DashVertexConverter) End() {
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dasher.next.End()
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}
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func (dasher *DashVertexConverter) lineTo(x, y float64) {
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rest := dasher.dash[dasher.currentDash] - dasher.distance
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for rest < 0 {
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dasher.distance = dasher.distance - dasher.dash[dasher.currentDash]
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dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash)
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rest = dasher.dash[dasher.currentDash] - dasher.distance
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}
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d := distance(dasher.x, dasher.y, x, y)
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for d >= rest {
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k := rest / d
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lx := dasher.x + k*(x-dasher.x)
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ly := dasher.y + k*(y-dasher.y)
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if dasher.currentDash%2 == 0 {
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// line
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dasher.next.LineTo(lx, ly)
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} else {
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// gap
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dasher.next.End()
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dasher.next.MoveTo(lx, ly)
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}
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d = d - rest
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dasher.x, dasher.y = lx, ly
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dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash)
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rest = dasher.dash[dasher.currentDash]
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}
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dasher.distance = d
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if dasher.currentDash%2 == 0 {
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// line
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dasher.next.LineTo(x, y)
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} else {
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// gap
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dasher.next.End()
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dasher.next.MoveTo(x, y)
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}
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if dasher.distance >= dasher.dash[dasher.currentDash] {
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dasher.distance = dasher.distance - dasher.dash[dasher.currentDash]
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dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash)
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}
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dasher.x, dasher.y = x, y
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}
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