87 lines
2 KiB
Go
87 lines
2 KiB
Go
//go:build !nodagre
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package d2plugin
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import (
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"context"
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"encoding/json"
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"fmt"
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"oss.terrastruct.com/d2/d2graph"
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"oss.terrastruct.com/d2/d2layouts/d2dagrelayout"
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"oss.terrastruct.com/util-go/xmain"
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)
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var DagrePlugin = dagrePlugin{}
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func init() {
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plugins = append(plugins, &DagrePlugin)
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}
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type dagrePlugin struct {
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opts *d2dagrelayout.ConfigurableOpts
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}
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func (p dagrePlugin) Flags(context.Context) ([]PluginSpecificFlag, error) {
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return []PluginSpecificFlag{
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{
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Name: "dagre-nodesep",
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Type: "int64",
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Default: int64(d2dagrelayout.DefaultOpts.NodeSep),
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Usage: "number of pixels that separate nodes horizontally.",
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Tag: "nodesep",
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},
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{
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Name: "dagre-edgesep",
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Type: "int64",
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Default: int64(d2dagrelayout.DefaultOpts.EdgeSep),
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Usage: "number of pixels that separate edges horizontally.",
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Tag: "edgesep",
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},
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}, nil
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}
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func (p *dagrePlugin) HydrateOpts(opts []byte) error {
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if opts != nil {
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var dagreOpts d2dagrelayout.ConfigurableOpts
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err := json.Unmarshal(opts, &dagreOpts)
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if err != nil {
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return xmain.UsageErrorf("non-dagre layout options given for dagre")
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}
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p.opts = &dagreOpts
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}
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return nil
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}
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func (p dagrePlugin) Info(ctx context.Context) (*PluginInfo, error) {
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opts := xmain.NewOpts(nil, nil, nil)
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flags, err := p.Flags(ctx)
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if err != nil {
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return nil, err
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}
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for _, f := range flags {
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f.AddToOpts(opts)
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}
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return &PluginInfo{
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Name: "dagre",
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ShortHelp: "The directed graph layout library Dagre",
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LongHelp: fmt.Sprintf(`dagre is a directed graph layout library for JavaScript.
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See https://github.com/dagrejs/dagre
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Flags correspond to ones found at https://github.com/dagrejs/dagre/wiki. See dagre's reference for more on each.
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Flags:
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%s
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`, opts.Defaults()),
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}, nil
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}
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func (p dagrePlugin) Layout(ctx context.Context, g *d2graph.Graph) error {
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return d2dagrelayout.Layout(ctx, g, p.opts)
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}
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func (p dagrePlugin) PostProcess(ctx context.Context, in []byte) ([]byte, error) {
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return in, nil
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}
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