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# set -x

T=svg
usage() {                                 # Function: Print a help message.
  echo "Usage: $0 [ -G|N|E GraphvizOption ] [ -L layoutEngine ] [ -T outputFormat ]  myFile.gv" 1>&2 
}
exit_abnormal() {                         # Function: Exit with error.
  usage
  exit 1
}

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/**************************************************************************

add a grid to a graph in .dot format

**************************************************************************/
BEGIN{
  int     i, Indx, bcnt, LR;
  string  Type, Val, Gcolor[], Gstyle[], Gsize[], tmpstr;
  string  Hcolor, Vcolor, Hstyle, Vstyle, gridType, gridAlign;
  float   Hsize, Vsize, deltaX, deltaY, minX, minY, maxX, maxY;

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/*****************************************************

Name:             roundedOrtho.gvpr

As of Date:       2024-08-25 20:24:11

Description:      when possible, changes ortho edges to round the squared edges

Usage:            dot -Gsplines=ortho myFile.gv | gvpr -cf roundedOrtho2.gvpr|neato -n2 -T...

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/**********************************************************************

  justify nodes that are on the same rank
    - add a new "rankjustify" to any nodes you want "justified"
    - legal values: t,b,l,r,min,max   (for top, bottom, left, right, min, and max)

  usage:
    dot myFile.gv | gvpr -cf justifyRanks.gvpr | neato -n ...
    
**********************************************************************/

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/**************************************************************************

add a grid to a graph in .dot format

**************************************************************************/
BEGIN{
  int     i, Indx, bcnt, LR;
  string  Type, Val, Gcolor[], Gstyle[], Gsize[], tmpstr;
  string  Hcolor, Vcolor, Hstyle, Vstyle, gridType, gridAlign;
  float   Hsize, Vsize, deltaX, deltaY, minX, minY, maxX, maxY;

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Converting a dot output to swimlanes

SWIMclustRankdirOff.mp4

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/*************************************************************************
  swimlanes

- for more info on swim lanes: https://en.wikipedia.org/wiki/Swim_lane

- new attributes, all at the parent cluster-level:
  - swimlanePool=true/false/[0-9]+  - turns on swimlane algorithm
    - if having nested swimlanes is desirable, true/false is
      insufficient.  Instead, use swimlane=someuniquename
  - swimlaneequalSize=true/false  all lanes given same width, or width determined "naturally" by dot

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/****************************************************************
  swapHeadTail.gvpr  -  swap tail & head of edge(s)

  (only seems to have "real" effect when using dot)

  replaces edges with tail & head swapped
    and (unless using -a0 option) "fixes" all the attribures that are associated with head or tail

  to swap ALL edges, either add
   - edge [swap=1] to your myFile.gv, then

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/********************************************************************
  gvlint.gvpr - lint program for Graphviz input

USAGE:
  gvpr -f gvlint.gvpr                # just produces a "report" (assumes dot)
  gvpr -cf gvlint.gvpr               # report & reformatted input
  gvpr -a neato -f gvlint.gvpr       # report assuming neato attributes
  gvpr -a S -f gvlint.gvpr myfile.gv # skip "pos not defined ..."
  gvpr -a "neato A" -f gvlint.gvpr   # report assuming neato attributes
                                     #     and show all attributes used

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BEGIN{
  int     clusterCnt, cHtmlCnt;
  graph_t aGraph;
  string  printBuf;
  ////////////////  help  /////////////////////////////////////////////
  string  help="
  gvstats.gvpr :
  a GVPR program that provides information about Graphviz input files
  - the file name
  - the layout engine  (if set)