prototyped svg reports

server/ui/svg/d.go

@@ -0,0 +1,217 @@
+package svg
+
+import (
+	"fmt"
+	"strings"
+)
+
+type (
+	D []PathCommand
+
+	PathCommand interface {
+		PrintPathCommand() (string, string, bool)
+		PrintPathCommandParameters() string
+	}
+
+	// PathCommand implementations
+
+	// PathRelative makes any PathCommand and converts it into a relative command (makes lowercase)
+	PathRelative[C PathCommand] struct {
+		Command C
+	}
+
+	PathMoveTo struct {
+		X, Y float64
+	}
+
+	PathLineTo struct {
+		X, Y float64
+	}
+	PathHorizontalLine float64
+	PathVerticalLine   float64
+
+	PathCubicBezier               []PathCubicBezierParameterTuple
+	PathCubicBezierParameterTuple struct {
+		X1, Y1 float64
+		X2, Y2 float64
+		X, Y   float64
+	}
+	PathSmoothCubicBezier               []PathSmoothCubicBezierParameterTuple
+	PathSmoothCubicBezierParameterTuple struct {
+		X2, Y2 float64
+		X, Y   float64
+	}
+
+	PathQuadraticBezier               []PathQuadraticBezierParameterTuple
+	PathQuadraticBezierParameterTuple struct {
+		X1, Y1 float64
+		X, Y   float64
+	}
+	PathSmoothQuadraticBezier               []PathSmoothQuadraticBezierParameterTuple
+	PathSmoothQuadraticBezierParameterTuple struct {
+		X, Y float64
+	}
+
+	PathElliptical               []PathEllipticalParameterTuple
+	PathEllipticalParameterTuple struct {
+		RX, RY    float64
+		Angle     float64
+		LargeArc  bool
+		Clockwise bool
+		X, Y      float64
+	}
+
+	PathClose struct{}
+)
+
+func PrintPathCommand(c PathCommand) (string, bool) {
+	cmd, params, ok := c.PrintPathCommand()
+	if !ok {
+		return "", false
+	}
+	return fmt.Sprintf("%s %s", cmd, params), true
+}
+
+func (c PathRelative[C]) PrintPathCommand() (string, string, bool) {
+	cmd, params, ok := c.Command.PrintPathCommand()
+	return strings.ToLower(cmd), params, ok
+}
+
+func (c PathMoveTo) PrintPathCommand() (string, string, bool) {
+	return "M", fmt.Sprintf("%v,%v", c.X, c.Y), true
+}
+
+func (c PathLineTo) PrintPathCommand() (string, string, bool) {
+	return "L", fmt.Sprintf("%v,%v", c.X, c.Y), true
+}
+
+func (c PathHorizontalLine) PrintPathCommand() (string, string, bool) {
+	return "H", fmt.Sprintf("%v", float64(c)), true
+}
+
+func (c PathVerticalLine) PrintPathCommand() (string, string, bool) {
+	return "V", fmt.Sprintf("%v", float64(c)), false
+}
+
+func (c PathCubicBezier) PrintPathCommand() (string, string, bool) {
+	if len(c) == 0 {
+		return "", "", false
+	}
+	return "C", printTuples(c), true
+}
+
+func (c PathCubicBezier) Append(x1, y1, x2, y2, x, y float64) PathCubicBezier {
+	return append(c, PathCubicBezierParameterTuple{
+		X1: x1,
+		Y1: y1,
+		X2: x2,
+		Y2: y2,
+		X:  x,
+		Y:  y,
+	})
+}
+
+func (t PathCubicBezierParameterTuple) String() string {
+	return fmt.Sprintf("%v,%v %v,%v %v,%v", t.X1, t.Y1, t.X2, t.Y2, t.X, t.Y)
+}
+
+func (c PathSmoothCubicBezier) PrintPathCommand() (string, string, bool) {
+	if len(c) == 0 {
+		return "", "", false
+	}
+	return "S", printTuples(c), true
+}
+
+func (c PathSmoothCubicBezier) Append(x2, y2, x, y float64) PathSmoothCubicBezier {
+	return append(c, PathSmoothCubicBezierParameterTuple{
+		X2: x2,
+		Y2: y2,
+		X:  x,
+		Y:  y,
+	})
+}
+
+func (t PathSmoothCubicBezierParameterTuple) String() string {
+	return fmt.Sprintf("%v,%v %v,%v", t.X2, t.Y2, t.X, t.Y)
+}
+
+func (c PathQuadraticBezier) PrintPathCommand() (string, string, bool) {
+	if len(c) == 0 {
+		return "", "", false
+	}
+	return "Q", printTuples(c), true
+}
+
+func (c PathQuadraticBezier) Append(x1, y1, x, y float64) PathQuadraticBezier {
+	return append(c, PathQuadraticBezierParameterTuple{
+		X1: x1,
+		Y1: y1,
+		X:  x,
+		Y:  y,
+	})
+}
+
+func (t PathQuadraticBezierParameterTuple) String() string {
+	return fmt.Sprintf("%v,%v %v,%v", t.X1, t.Y1, t.X, t.Y)
+}
+
+func (c PathSmoothQuadraticBezier) PrintPathCommand() (string, string, bool) {
+	if len(c) == 0 {
+		return "", "", false
+	}
+	return "T", printTuples(c), true
+}
+
+func (c PathSmoothQuadraticBezier) Append(x, y float64) PathSmoothQuadraticBezier {
+	return append(c, PathSmoothQuadraticBezierParameterTuple{
+		X: x,
+		Y: y,
+	})
+}
+
+func (t PathSmoothQuadraticBezierParameterTuple) String() string {
+	return fmt.Sprintf("%v,%v", t.X, t.Y)
+}
+
+func (c PathElliptical) PrintPathCommand() (string, string, bool) {
+	if len(c) == 0 {
+		return "", "", false
+	}
+	return "A", printTuples(c), true
+}
+
+func (c PathElliptical) Append(rx, ry, angle float64, largeArc, clockwise bool, x, y float64) PathElliptical {
+	return append(c, PathEllipticalParameterTuple{
+		RX:        rx,
+		RY:        ry,
+		Angle:     angle,
+		LargeArc:  largeArc,
+		Clockwise: clockwise,
+		X:         x,
+		Y:         y,
+	})
+}
+
+func (t PathEllipticalParameterTuple) String() string {
+	var (
+		largeArcFlag int
+		sweepFlag    int
+	)
+
+	if t.LargeArc {
+		largeArcFlag = 1
+	}
+	if t.Clockwise {
+		sweepFlag = 1
+	}
+
+	return fmt.Sprintf("%v,%v,%v,%d,%d,%v,%v", t.RX, t.RY, t.Angle, largeArcFlag, sweepFlag, t.X, t.Y)
+}
+
+func printTuples[S fmt.Stringer](vs []S) string {
+	ss := make([]string, len(vs))
+	for i, v := range vs {
+		ss[i] = fmt.Sprint(v)
+	}
+	return strings.Join(ss, " ")
+}