HDElk mod

This is a fork from HDElk. Some features are added:

1. New features

1. arrow-head at edge termination
2. Bi-directional edge with bidir option (reverse is not supported)
3. show dimension in port and edge label with rank option (e.g.: rank: [2,8] automatically appends [1:0][7:0] to the label)
4. multi-line node and edge label
5. You can add description to nodes/edges with desc property for them. The description font size is 0.8x (DEFAULT_DESC_FONT_SIZE_SCALER in hdelk.js) of that for node name / edge label.
6. You can override edge bus visual width by edge_bus_visual_width argument of hdelk.layout function (e.g. hdelk.layout(graph, "diagram", edge_bus_visual_width=3)).
7. You can specify thoroughness layout algorithm parameter of ELK. hdelk.layout(graph, "title", [thoroughness]);
8. You can fix port orders with fixPortOrder: true option (prevent from being sorted in layout calculation) per node.
9. C-style comments in .jsonc file (see: C-style comments and Julia-based string interpolation)
10. Julia-based string interpolation (see: C-style comments and Julia-based string interpolation)
11. new colors

2. C-style comments and Julia-based string interpolation

2.1. Prerequisites

This program is tested in the following environment:

• GNU bash 5.1.16
• GNU sed 4.8
• Python 3.10.13
• Julia 1.10.2

2.2. How to use

1. Put constants used in JSONC file in constants.jl. This .jl file should be placed in the same directory as the target JSONC file. Example usage is shown in example/constants.jl.

2. Write the target JSONC file. In this file, the HDElk syntax is valid. In addition, the following features can be used:

   1. C-style comments (/* ... */)
   2. Julia string interpolation ($(...))

   Example usage is shown in example/example_count.jsonc.

3. Run the following command:

   py_scripts/jsonc2html.py <path to the target JSONC file>
   
   # example:
   # $ py_scripts/jsonc2html.py example/example_count.jsonc

   The intermediate julia_code.jl is generated and Julia runs it.

4. The generated HTML file's base name is the same as that of the input JSONC file. To render this HTML file, make sure that HDElk's js folder is in the same directory as the HTML file (or you can modify the js library path in the html template in jsonc2html.py script, or manually edit the generated html file).

3. modified files

• js/hdelk.js

4. LICENSE

HDElk depends the following libraries:

• elkjs v0.9.2: LICENSE_elkjs.md