apparat.graph.DOTExport.scala Maven / Gradle / Ivy
/*
* This file is part of Apparat.
*
* Apparat is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Apparat is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Apparat. If not, see .
*
* Copyright (C) 2009 Joa Ebert
* http://www.joa-ebert.com/
*
*/
package apparat.graph
import apparat.utils.{IndentingPrintWriter}
import apparat.utils.IO._
import java.io.{File => JFile, FileOutputStream => JFileOutputStream,
PrintWriter => JPrintWriter, PrintStream => JPrintStream}
final class DOTExport[V](val graph: GraphLike[V],
val vertexToString: V => String,
val edgeToString: Edge[V] => String)
{
def to(pathname: String): Unit = to(new JFile(pathname))
def to(file: JFile): Unit = using(new JFileOutputStream(file)){
stream => to(new IndentingPrintWriter(new JPrintWriter(stream)))
}
def to(stream: JPrintStream): Unit = to(new JPrintWriter(stream))
def to(writer: JPrintWriter): Unit = {
val indentingPrintWriter = new IndentingPrintWriter(writer)
to(indentingPrintWriter)
indentingPrintWriter.flush()
}
def to(writer: IndentingPrintWriter): Unit = {
val fontName = "Bitstream Vera Sans Mono"
val fontSize = 8
val vertices = graph.verticesIterator.toList
writer <= "digraph G {"
writer withIndent {
writer <= "fontname=\"" + fontName + "\";"
writer <= "fontsize=" + fontSize + ";"
writer <= "ratio=auto;"
writer <= "graph["
writer withIndent {
writer <= "rankdir=\"TB\","
writer <= "splines=true,"
writer <= "overlap=false"
}
writer <= "];"
writer <= "node["
writer withIndent {
writer <= "fontname=\"" + fontName + "\", "
writer <= "fontsize=" + fontSize + ","
writer <= "shape=\"record\""
}
writer <= "];"
writer <= "edge["
writer withIndent {
writer <= "fontname=\"" + fontName + "\", "
writer <= "fontsize=" + fontSize + ","
writer <= "arrowhead=\"empty\""
}
writer <= "];"
writer.println(vertices) {
vertex => (vertices indexOf vertex) + " " + vertexToString(vertex) + ";"
}
writer.println(graph.edgesIterator) {
edge => (vertices indexOf edge.startVertex) + " -> " + (vertices indexOf edge.endVertex) + " " + edgeToString(edge) + ";"
}
}
writer <= "}"
}
private def escape(value: String) = value.replaceAll("\\\\", "\\\\\\\\").
replaceAll("\n", "\\\\\\\\n").replaceAll("\"", "\\\\\"")
}
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