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plotly.Plotly.scala Maven / Gradle / Ivy

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package plotly

import java.io.{ ByteArrayOutputStream, File, InputStream }

import io.circe.Printer
import io.circe.syntax._

import plotly.Codecs._
import plotly.element.Color
import plotly.layout._

import java.lang.{ Boolean => JBoolean, Double => JDouble, Integer => JInt }
import java.nio.file.Files

import scala.annotation.tailrec

object Plotly {

  private val printer = Printer.noSpaces.copy(dropNullKeys = true)

  def jsSnippet(div: String, data: Seq[Trace], layout: Layout): String = {

    val b = new StringBuilder

    b ++= "(function () {\n"

    for ((d, idx) <- data.zipWithIndex) {
      b ++= s"  var data$idx = "
      b ++= printer.pretty(d.asJson)
      b ++= ";\n"
    }

    b ++= "\n  "
    b ++= data.indices.map(idx => s"data$idx").mkString("var data = [", ", ", "];")
    b ++= "\n"
    b ++= "  var layout = "
    b ++= printer.pretty(layout.asJson)
    b ++= ";\n\n  Plotly.plot('"
    b ++= div.replaceAll("'", "\\'")
    b ++= "', data, layout);\n"

    b ++= "})();"

    b.result()
  }

  private def readFully(is: InputStream): Array[Byte] = {
    val buffer = new ByteArrayOutputStream()
    val data = Array.ofDim[Byte](16384)

    var nRead = is.read(data, 0, data.length)
    while (nRead != -1) {
      buffer.write(data, 0, nRead)
      nRead = is.read(data, 0, data.length)
    }

    buffer.flush()
    buffer.toByteArray
  }

  val plotlyVersion = "1.12.0" // FIXME Get from build.sbt

  def plotlyMinJs: String = {
    var is: InputStream = null
    try {
      is = getClass.getClassLoader.getResourceAsStream(s"META-INF/resources/webjars/plotly.js/$plotlyVersion/dist/plotly.min.js")
      if (is == null)
        throw new Exception(s"plotly.min.js resource not found")

      new String(readFully(is), "UTF-8")
    } finally {
      if (is != null)
        is.close()
    }
  }

  def plot(
    path: String,
    traces: Seq[Trace],
    layout: Layout,
    useCdn: Boolean = true,
    openInBrowser: Boolean = true,
    addSuffixIfExists: Boolean = true
  ): File = {

    val f0 = new File(path)

    val f =
      if (addSuffixIfExists) {
        lazy val name = f0.getName
        lazy val idx = name.lastIndexOf('.')

        lazy val (prefix, suffixOpt) =
          if (idx < 0)
            (name, None)
          else
            (name.take(idx), Some(name.drop(idx + 1)))

        def nameWithIndex(idx: Int) =
          s"$prefix-$idx${suffixOpt.fold("")("." + _)}"

        @tailrec
        def nonExisting(counter: Option[Int]): File = {
          val f = counter.fold(f0) { n =>
            new File(f0.getParentFile, nameWithIndex(n))
          }

          if (f.exists())
            nonExisting(counter.fold(Some(1))(n => Some(n + 1)))
          else
            f
        }

        nonExisting(None)
      } else if (f0.exists())
        throw new Exception(s"$f0 already exists")
      else
        f0

    val plotlyHeader =
      if (useCdn)
        s""""""
      else
        s""

    val divId = "chart"

    val html =
      s"""
         |
         |
         |${layout.title.getOrElse("plotly chart")}
         |$plotlyHeader
         |
         |
         |
| | | """.stripMargin Files.write(f.toPath, html.getBytes("UTF-8")) if (openInBrowser) { val cmdOpt = sys.props.get("os.name").map(_.toLowerCase) match { case Some("mac os x") => Some(Seq("open", f.getAbsolutePath)) case Some(win) if win.startsWith("windows") => Some(Seq("cmd", s"start ${f.getAbsolutePath}")) case Some(lin) if lin.indexOf("linux") >= 0 => Some(Seq("xdg-open", f.getAbsolutePath)) case other => None } cmdOpt match { case Some(cmd) => sys.process.Process(cmd).! case None => Console.err.println(s"Don't know how to open ${f.getAbsolutePath}") } } f } implicit class TraceOps(val trace: Trace) extends AnyVal { def plot( path: String, layout: Layout, useCdn: Boolean, openInBrowser: Boolean, addSuffixIfExists: Boolean ): Unit = Plotly.plot( path, Seq(trace), layout, useCdn = useCdn, openInBrowser = openInBrowser, addSuffixIfExists = addSuffixIfExists ) def plot( path: String = "./plot.html", title: String = null, legend: Legend = null, width: JInt = null, height: JInt = null, showlegend: JBoolean = null, xaxis: Axis = null, yaxis: Axis = null, xaxis1: Axis = null, xaxis2: Axis = null, xaxis3: Axis = null, xaxis4: Axis = null, yaxis1: Axis = null, yaxis2: Axis = null, yaxis3: Axis = null, yaxis4: Axis = null, barmode: BarMode = null, autosize: JBoolean = null, margin: Margin = null, annotations: Seq[Annotation] = null, plot_bgcolor: Color = null, paper_bgcolor: Color = null, font: Font = null, bargap: JDouble = null, bargroupgap: JDouble = null, hovermode: HoverMode = null, boxmode: BoxMode = null, useCdn: Boolean = true, openInBrowser: Boolean = true, addSuffixIfExists: Boolean = true ): Unit = plot( path, Layout( title, legend, width, height, showlegend, xaxis, yaxis, xaxis1, xaxis2, xaxis3, xaxis4, yaxis1, yaxis2, yaxis3, yaxis4, barmode, autosize, margin, annotations, plot_bgcolor, paper_bgcolor, font, bargap, bargroupgap, hovermode, boxmode ), useCdn, openInBrowser, addSuffixIfExists ) } implicit class TraceSeqOps(val traces: Seq[Trace]) extends AnyVal { def plot( path: String, layout: Layout, useCdn: Boolean, openInBrowser: Boolean, addSuffixIfExists: Boolean ): Unit = Plotly.plot( path, traces, layout, useCdn = useCdn, openInBrowser = openInBrowser, addSuffixIfExists = addSuffixIfExists ) def plot( path: String = "./plot.html", title: String = null, legend: Legend = null, width: JInt = null, height: JInt = null, showlegend: JBoolean = null, xaxis: Axis = null, yaxis: Axis = null, xaxis1: Axis = null, xaxis2: Axis = null, xaxis3: Axis = null, xaxis4: Axis = null, yaxis1: Axis = null, yaxis2: Axis = null, yaxis3: Axis = null, yaxis4: Axis = null, barmode: BarMode = null, autosize: JBoolean = null, margin: Margin = null, annotations: Seq[Annotation] = null, plot_bgcolor: Color = null, paper_bgcolor: Color = null, font: Font = null, bargap: JDouble = null, bargroupgap: JDouble = null, hovermode: HoverMode = null, boxmode: BoxMode = null, useCdn: Boolean = true, openInBrowser: Boolean = true, addSuffixIfExists: Boolean = true ): Unit = plot( path, Layout( title, legend, width, height, showlegend, xaxis, yaxis, xaxis1, xaxis2, xaxis3, xaxis4, yaxis1, yaxis2, yaxis3, yaxis4, barmode, autosize, margin, annotations, plot_bgcolor, paper_bgcolor, font, bargap, bargroupgap, hovermode, boxmode ), useCdn, openInBrowser, addSuffixIfExists ) } }




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