Figure out how to support parameters about netlistsvg

[nturley]

My yosys netlists have parameters:

        "$add$input.v:17$3": {
          "hide_name": 1,
          "type": "$add",
          "parameters": {
            "A_SIGNED": 0,
            "A_WIDTH": 9,
            "B_SIGNED": 0,
            "B_WIDTH": 2,
            "Y_WIDTH": 10
          },
          "attributes": {
            "src": "input.v:17"
          }

It also has attributes.

Here's my idea. Recently, I've been thinking about how to make the template nodes more parameterizable. For instance adding <text> nodes that hold information about the cell that they represent.

<g s:type="add" transform="translate(50, 150)" s:width="25" s:height="25">
    <s:alias val="$add"/>

    <text s:value="parameters">parameter placeholder </text>
    <circle r="12.5" cx="12.5" cy="12.5" />
...

Then the text in the <text> node could be replaced with

"A_SIGNED": 0,
"A_WIDTH": 9,
"B_SIGNED": 0,
"B_WIDTH": 2,
"Y_WIDTH": 10

I think the text either has be considered a "label" of the node or it has to be within the parent bounding box defined by s:width and s:height. Otherwise the wires will get routed through it.