elliotchance/gedcom

package html

import (
    "fmt"
    "io"

    "github.com/elliotchance/gedcom/v39/html/core"
)

// PlusSVG draws a "+" as an SVG with each line of the "+" being optional.
type PlusSVG struct {
    top, left, right, bottom bool
}

func NewPlusSVG(top, left, right, bottom bool) *PlusSVG {
    return &PlusSVG{
        top:    top,
        left:   left,
        right:  right,
        bottom: bottom,
    }
}

func (c *PlusSVG) WriteHTMLTo(w io.Writer) (int64, error) {
    // The "+" is constructed of two lines. Each of the lines need 4 coordinates
    // to represent the start and end points of X and Y. The values represent
    // percentages.
    //
    // By default the lines are set to render the none of the sides of the "+".
    // So it would render a small square dot in the middle. Each of the
    // activated options will adjust the appropriate sides to extend the lines
    // in that direction.

    hLineX1, hLineX2, hLineY1, hLineY2 := 50, 50, 50, 50
    vLineX1, vLineX2, vLineY1, vLineY2 := 50, 50, 50, 50

    if c.top {
        vLineY1 = 20
    }

    if c.left {
        hLineX1 = 0
    }

    if c.right {
        hLineX2 = 100
    }

    if c.bottom {
        vLineY2 = 80
    }

    return core.NewHTML(fmt.Sprintf(`
        <svg style="width: 100%%; height: 75px">
            <line x1="%d%%" y1="%d%%" x2="%d%%" y2="%d%%" style="stroke:rgb(0,0,0);stroke-width:3" />
            <line x1="%d%%" y1="%d%%" x2="%d%%" y2="%d%%" style="stroke:rgb(0,0,0);stroke-width:3" />
        </svg>
    `, hLineX1, hLineY1, hLineX2, hLineY2, vLineX1, vLineY1, vLineX2, vLineY2)).
        WriteHTMLTo(w)
}