Merge branch 'terrastruct:master' into fix-bugs

README.md

@@ -261,6 +261,7 @@ let us know and we'll be happy to include it here!
 - **ent2d2**: [https://github.com/tmc/ent2d2](https://github.com/tmc/ent2d2)
 - **MkDocs Plugin**: [https://github.com/landmaj/mkdocs-d2-plugin](https://github.com/landmaj/mkdocs-d2-plugin)
 - **Remark Plugin**: [https://github.com/mech-a/remark-d2](https://github.com/mech-a/remark-d2)
+- **VitePress Plugin**: [https://github.com/BadgerHobbs/vitepress-plugin-d2](https://github.com/BadgerHobbs/vitepress-plugin-d2)
 - **Zed extension**: [https://github.com/gabeidx/zed-d2](https://github.com/gabeidx/zed-d2)
 
 ### Misc

ci/release/changelogs/next.md

@@ -4,10 +4,12 @@
 - Connections now support `link` [#1955](https://github.com/terrastruct/d2/pull/1955)
 - Vars: vars in markdown blocks are substituted [#2218](https://github.com/terrastruct/d2/pull/2218)
 - Markdown: Github-flavored tables work in `md` blocks [#2221](https://github.com/terrastruct/d2/pull/2221)
+- Render: adds box arrowheads [#2227](https://github.com/terrastruct/d2/issues/2227)
 - `d2 fmt` now supports a `--check` flag [#2253](https://github.com/terrastruct/d2/pull/2253)
 - CLI: PNG output to stdout is supported using `--stdout-format png -` [#2291](https://github.com/terrastruct/d2/pull/2291)
 - Globs: `&connected` and `&leaf` filters are implemented [#2299](https://github.com/terrastruct/d2/pull/2299)
 - CLI: add --no-xml-tag for direct HTML embedding [#2302](https://github.com/terrastruct/d2/pull/2302)
+- CLI: `play` cmd added for opening d2 input in online playground [#2242](https://github.com/terrastruct/d2/pull/2242)
 
 #### Improvements 🧹
 

ci/release/template/man/d2.1

@@ -15,6 +15,8 @@
 .Ar layout Op Ar name
 .Nm d2
 .Ar fmt Ar file.d2 ...
+.Nm d2
+.Ar play Ar file.d2
 .Sh DESCRIPTION
 .Nm
 compiles and renders
@@ -141,6 +143,9 @@ Print version information and exit
 .It Fl -stdout-format Ar string
 Set the output format when writing to stdout. Supported formats are: png, svg. Only used when output is set to stdout (-)
 .Ns .
+.It Fl -no-xml-tag Ar false
+Omit XML tag (<?xml ...?>) from output SVG files. Useful when generating SVGs for direct HTML embedding
+.Ns .
 .El
 .Sh SUBCOMMANDS
 .Bl -tag -width Fl
@@ -155,10 +160,8 @@ Lists available themes
 .Ns .
 .It Ar fmt Ar file.d2 ...
 Format all passed files
-.It Fl -no-xml-tag Ar false
-Omit XML tag (<?xml ...?>) from output SVG files. Useful when generating SVGs for direct HTML embedding
-.Ns .
-.Ns .
+.It Ar play Ar file.d2
+Opens the file in playground, an online web viewer (https://play.d2lang.com)
 .El
 .Sh ENVIRONMENT VARIABLES
 Many flags can also be set with environment variables.

d2cli/help.go

@@ -22,6 +22,7 @@ Usage:
   %[1]s [--watch=false] [--theme=0] file.d2 [file.svg | file.png]
   %[1]s layout [name]
   %[1]s fmt file.d2 ...
+  %[1]s play [--theme=0] [--sketch] file.d2
 
 %[1]s compiles and renders file.d2 to file.svg | file.png
 It defaults to file.svg if an output path is not provided.
@@ -38,6 +39,7 @@ Subcommands:
   %[1]s layout [name] - Display long help for a particular layout engine, including its configuration options
   %[1]s themes - Lists available themes
   %[1]s fmt file.d2 ... - Format passed files
+	%[1]s play file.d2 - Opens the file in playground, an online web viewer (https://play.d2lang.com)
 
 See more docs and the source code at https://oss.terrastruct.com/d2.
 Hosted icons at https://icons.terrastruct.com.

d2cli/main.go

@@ -171,6 +171,8 @@ func Run(ctx context.Context, ms *xmain.State) (err error) {
 			return nil
 		case "fmt":
 			return fmtCmd(ctx, ms, *checkFlag)
+		case "play":
+			return playCmd(ctx, ms)
 		case "version":
 			if len(ms.Opts.Flags.Args()) > 1 {
 				return xmain.UsageErrorf("version subcommand accepts no arguments")

d2cli/play.go

@@ -0,0 +1,75 @@
+package d2cli
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+
+	"oss.terrastruct.com/d2/lib/urlenc"
+	"oss.terrastruct.com/util-go/xbrowser"
+	"oss.terrastruct.com/util-go/xmain"
+)
+
+func playCmd(ctx context.Context, ms *xmain.State) error {
+	if len(ms.Opts.Flags.Args()) != 2 {
+		return xmain.UsageErrorf("play must be passed one argument: either a filepath or '-' for stdin")
+	}
+	filepath := ms.Opts.Flags.Args()[1]
+
+	theme, err := ms.Opts.Flags.GetInt64("theme")
+	if err != nil {
+		return err
+	}
+
+	sketch, err := ms.Opts.Flags.GetBool("sketch")
+	if err != nil {
+		return err
+	}
+
+	var sketchNumber int
+	if sketch {
+		sketchNumber = 1
+	} else {
+		sketchNumber = 0
+	}
+
+	fileRaw, err := readInput(filepath)
+	if err != nil {
+		return err
+	}
+
+	encoded, err := urlenc.Encode(fileRaw)
+	if err != nil {
+		return err
+	}
+
+	url := fmt.Sprintf("https://play.d2lang.com/?script=%s&sketch=%d&theme=%d&", encoded, sketchNumber, theme)
+	openBrowser(ctx, ms, url)
+	return nil
+}
+
+func readInput(filepath string) (string, error) {
+	if filepath == "-" {
+		data, err := io.ReadAll(os.Stdin)
+		if err != nil {
+			return "", fmt.Errorf("error reading from stdin: %w", err)
+		}
+		return string(data), nil
+	}
+
+	data, err := os.ReadFile(filepath)
+	if err != nil {
+		return "", xmain.UsageErrorf(err.Error())
+	}
+	return string(data), nil
+}
+
+func openBrowser(ctx context.Context, ms *xmain.State, url string) {
+	ms.Log.Info.Printf("opening playground: %s", url)
+
+	err := xbrowser.Open(ctx, ms.Env, url)
+	if err != nil {
+		ms.Log.Warn.Printf("failed to open browser to %v: %v", url, err)
+	}
+}

d2renderers/d2sketch/sketch.go

@@ -840,6 +840,22 @@ func ArrowheadJS(r jsrunner.JSRunner, arrowhead d2target.Arrowhead, stroke strin
 			stroke,
 			BG_COLOR,
 		)
+	case d2target.BoxArrowhead:
+		arrowJS = fmt.Sprintf(
+			`node = rc.polygon(%s, { strokeWidth: %d, stroke: "%s", fill: "%s", fillStyle: "solid", seed: 1})`,
+			`[[0, -10], [0, 10], [-20, 10], [-20, -10]]`,
+			strokeWidth,
+			stroke,
+			BG_COLOR,
+		)
+	case d2target.FilledBoxArrowhead:
+		arrowJS = fmt.Sprintf(
+			`node = rc.polygon(%s, { strokeWidth: %d, stroke: "%s", fill: "%s", fillStyle: "solid", seed: 1})`,
+			`[[0, -10], [0, 10], [-20, 10], [-20, -10]]`,
+			strokeWidth,
+			stroke,
+			stroke,
+		)
 	}
 	return
 }

d2renderers/d2sketch/sketch_test.go

@@ -462,6 +462,20 @@ a.9 <-> b.9: cf-one-required {
 	source-arrowhead.shape: cf-one-required
 	target-arrowhead.shape: cf-one-required
 }
+a.10 <-> b.10: box {
+	source-arrowhead.shape: box
+	target-arrowhead.shape: box
+}
+a.11 <-> b.11: box-filled {
+	source-arrowhead: {
+		shape: box
+		style.filled: true
+	}
+	target-arrowhead: {
+		shape: box
+		style.filled: true
+	}
+}
 `,
 		},
 		{

d2renderers/d2svg/d2svg.go

@@ -289,6 +289,54 @@ func arrowheadMarker(isTarget bool, id string, connection d2target.Connection, i
 		}
 
 		path = circleEl.Render()
+	case d2target.FilledBoxArrowhead:
+		polygonEl := d2themes.NewThemableElement("polygon", inlineTheme)
+		polygonEl.ClassName = "connection"
+		polygonEl.Fill = connection.Stroke
+		polygonEl.Attributes = fmt.Sprintf(`stroke-width="%d"`, connection.StrokeWidth)
+
+		if isTarget {
+			polygonEl.Points = fmt.Sprintf("%f,%f %f,%f %f,%f %f,%f",
+				0., 0.,
+				0., height,
+				width, height,
+				width, 0.,
+			)
+		} else {
+			polygonEl.Points = fmt.Sprintf("%f,%f %f,%f %f,%f %f,%f",
+				0., 0.,
+				0., height,
+				width, height,
+				width, 0.,
+			)
+		}
+
+		path = polygonEl.Render()
+	case d2target.BoxArrowhead:
+		polygonEl := d2themes.NewThemableElement("polygon", inlineTheme)
+		polygonEl.ClassName = "connection"
+		polygonEl.Fill = d2target.BG_COLOR
+		polygonEl.Stroke = connection.Stroke
+		polygonEl.Attributes = fmt.Sprintf(`stroke-width="%d"`, connection.StrokeWidth)
+		polygonEl.Style = fmt.Sprintf("%sstroke-linejoin:miter;", polygonEl.Style)
+
+		inset := strokeWidth / 2
+		if isTarget {
+			polygonEl.Points = fmt.Sprintf("%f,%f %f,%f %f,%f %f,%f",
+				inset, inset,
+				inset, height-inset,
+				width-inset, height-inset,
+				width-inset, inset,
+			)
+		} else {
+			polygonEl.Points = fmt.Sprintf("%f,%f %f,%f %f,%f %f,%f",
+				inset, inset,
+				inset, height-inset,
+				width-inset, height-inset,
+				width-inset, inset,
+			)
+		}
+		path = polygonEl.Render()
 	case d2target.CfOne, d2target.CfMany, d2target.CfOneRequired, d2target.CfManyRequired:
 		offset := 3.0 + float64(connection.StrokeWidth)*1.8
 

d2target/d2target.go

@@ -755,6 +755,8 @@ const (
 	FilledDiamondArrowhead    Arrowhead = "filled-diamond"
 	CircleArrowhead           Arrowhead = "circle"
 	FilledCircleArrowhead     Arrowhead = "filled-circle"
+	BoxArrowhead              Arrowhead = "box"
+	FilledBoxArrowhead        Arrowhead = "filled-box"
 
 	// For fat arrows
 	LineArrowhead Arrowhead = "line"
@@ -775,6 +777,7 @@ var Arrowheads = map[string]struct{}{
 	string(TriangleArrowhead): {},
 	string(DiamondArrowhead):  {},
 	string(CircleArrowhead):   {},
+	string(BoxArrowhead):      {},
 	string(CfOne):             {},
 	string(CfMany):            {},
 	string(CfOneRequired):     {},
@@ -802,6 +805,11 @@ func ToArrowhead(arrowheadType string, filled *bool) Arrowhead {
 			return UnfilledTriangleArrowhead
 		}
 		return TriangleArrowhead
+	case string(BoxArrowhead):
+		if filled != nil && *filled {
+			return FilledBoxArrowhead
+		}
+		return BoxArrowhead
 	case string(CfOne):
 		return CfOne
 	case string(CfMany):
@@ -856,6 +864,11 @@ func (arrowhead Arrowhead) Dimensions(strokeWidth float64) (width, height float6
 		baseHeight = 8
 		widthMultiplier = 5
 		heightMultiplier = 5
+	case FilledBoxArrowhead, BoxArrowhead:
+		baseWidth = 6
+		baseHeight = 6
+		widthMultiplier = 5
+		heightMultiplier = 5
 	case CfOne, CfMany, CfOneRequired, CfManyRequired:
 		baseWidth = 9
 		baseHeight = 9

e2etests/stable_test.go

@@ -2325,6 +2325,29 @@ c <-> d: filled-circle {
     shape: circle
     style.filled: true
   }
+}`,
+		},
+		{
+			name: "box_arrowhead",
+			script: `
+a <-> b: box {
+  source-arrowhead: {
+    shape: box
+  }
+  target-arrowhead: {
+    shape: box
+  }
+}
+  
+c <-> d: filled-box {
+  source-arrowhead: {
+    shape: box
+	style.filled: true
+  }
+  target-arrowhead: {
+    shape: box
+	style.filled: true
+  }
 }`,
 		},
 		{

e2etests/testdata/files/arrowhead_scaling.d2

@@ -215,6 +215,78 @@ filled circle: {
   }
 }
 
+box: {
+  start: ""
+  end: ""
+
+  start.1 <-> end.1: 1 {
+    style.stroke-width: 1
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+  }
+  start.2 <-> end.2: 2 {
+    style.stroke-width: 2
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+  }
+  start.4 <-> end.4: 4 {
+    style.stroke-width: 4
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+  }
+  start.8 <-> end.8: 8 {
+    style.stroke-width: 8
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+  }
+  start.15 <-> end.15: 15 {
+    style.stroke-width: 15
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+  }
+}
+
+filled-box: {
+  start: ""
+  end: ""
+
+  start.1 <-> end.1: 1 {
+    style.stroke-width: 1
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+    source-arrowhead.style.filled: true
+    target-arrowhead.style.filled: true
+  }
+  start.2 <-> end.2: 2 {
+    style.stroke-width: 2
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+    source-arrowhead.style.filled: true
+    target-arrowhead.style.filled: true
+  }
+  start.4 <-> end.4: 4 {
+    style.stroke-width: 4
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+    source-arrowhead.style.filled: true
+    target-arrowhead.style.filled: true
+  }
+  start.8 <-> end.8: 8 {
+    style.stroke-width: 8
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+    source-arrowhead.style.filled: true
+    target-arrowhead.style.filled: true
+  }
+  start.15 <-> end.15: 15 {
+    style.stroke-width: 15
+    source-arrowhead.shape: box
+    target-arrowhead.shape: box
+    source-arrowhead.style.filled: true
+    target-arrowhead.style.filled: true
+  }
+}
+
 cf one: {
   start: ""
   end: ""

e2etests/testdata/stable/box_arrowhead/dagre/board.exp.json

@@ -0,0 +1,322 @@
+{
+  "name": "",
+  "config": {
+    "sketch": false,
+    "themeID": 0,
+    "darkThemeID": null,
+    "pad": null,
+    "center": null,
+    "layoutEngine": null
+  },
+  "isFolderOnly": false,
+  "fontFamily": "SourceSansPro",
+  "shapes": [
+    {
+      "id": "a",
+      "type": "rectangle",
+      "pos": {
+        "x": 0,
+        "y": 0
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "a",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "b",
+      "type": "rectangle",
+      "pos": {
+        "x": 0,
+        "y": 187
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "b",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "c",
+      "type": "rectangle",
+      "pos": {
+        "x": 114,
+        "y": 0
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "c",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "d",
+      "type": "rectangle",
+      "pos": {
+        "x": 113,
+        "y": 187
+      },
+      "width": 54,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "d",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 9,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    }
+  ],
+  "connections": [
+    {
+      "id": "(a <-> b)[0]",
+      "src": "a",
+      "srcArrow": "box",
+      "dst": "b",
+      "dstArrow": "box",
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "stroke": "B1",
+      "borderRadius": 10,
+      "label": "box",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N2",
+      "italic": true,
+      "bold": false,
+      "underline": false,
+      "labelWidth": 25,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "labelPercentage": 0,
+      "link": "",
+      "route": [
+        {
+          "x": 26.5,
+          "y": 65.5
+        },
+        {
+          "x": 26.5,
+          "y": 114.30000305175781
+        },
+        {
+          "x": 26.5,
+          "y": 138.6999969482422
+        },
+        {
+          "x": 26.5,
+          "y": 187.5
+        }
+      ],
+      "isCurve": true,
+      "animated": false,
+      "tooltip": "",
+      "icon": null,
+      "zIndex": 0
+    },
+    {
+      "id": "(c <-> d)[0]",
+      "src": "c",
+      "srcArrow": "filled-box",
+      "dst": "d",
+      "dstArrow": "filled-box",
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "stroke": "B1",
+      "borderRadius": 10,
+      "label": "filled-box",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N2",
+      "italic": true,
+      "bold": false,
+      "underline": false,
+      "labelWidth": 63,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "labelPercentage": 0,
+      "link": "",
+      "route": [
+        {
+          "x": 140,
+          "y": 65.5
+        },
+        {
+          "x": 140,
+          "y": 114.30000305175781
+        },
+        {
+          "x": 140,
+          "y": 138.6999969482422
+        },
+        {
+          "x": 140,
+          "y": 187.5
+        }
+      ],
+      "isCurve": true,
+      "animated": false,
+      "tooltip": "",
+      "icon": null,
+      "zIndex": 0
+    }
+  ],
+  "root": {
+    "id": "",
+    "type": "",
+    "pos": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0,
+    "height": 0,
+    "opacity": 0,
+    "strokeDash": 0,
+    "strokeWidth": 0,
+    "borderRadius": 0,
+    "fill": "N7",
+    "stroke": "",
+    "animated": false,
+    "shadow": false,
+    "3d": false,
+    "multiple": false,
+    "double-border": false,
+    "tooltip": "",
+    "link": "",
+    "icon": null,
+    "iconPosition": "",
+    "blend": false,
+    "fields": null,
+    "methods": null,
+    "columns": null,
+    "label": "",
+    "fontSize": 0,
+    "fontFamily": "",
+    "language": "",
+    "color": "",
+    "italic": false,
+    "bold": false,
+    "underline": false,
+    "labelWidth": 0,
+    "labelHeight": 0,
+    "zIndex": 0,
+    "level": 0
+  }
+}

e2etests/testdata/stable/box_arrowhead/elk/board.exp.json

@@ -0,0 +1,304 @@
+{
+  "name": "",
+  "config": {
+    "sketch": false,
+    "themeID": 0,
+    "darkThemeID": null,
+    "pad": null,
+    "center": null,
+    "layoutEngine": null
+  },
+  "isFolderOnly": false,
+  "fontFamily": "SourceSansPro",
+  "shapes": [
+    {
+      "id": "a",
+      "type": "rectangle",
+      "pos": {
+        "x": 12,
+        "y": 12
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "a",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "b",
+      "type": "rectangle",
+      "pos": {
+        "x": 12,
+        "y": 239
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "b",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "c",
+      "type": "rectangle",
+      "pos": {
+        "x": 85,
+        "y": 12
+      },
+      "width": 53,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "c",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 8,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    },
+    {
+      "id": "d",
+      "type": "rectangle",
+      "pos": {
+        "x": 85,
+        "y": 239
+      },
+      "width": 54,
+      "height": 66,
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "borderRadius": 0,
+      "fill": "B6",
+      "stroke": "B1",
+      "animated": false,
+      "shadow": false,
+      "3d": false,
+      "multiple": false,
+      "double-border": false,
+      "tooltip": "",
+      "link": "",
+      "icon": null,
+      "iconPosition": "",
+      "blend": false,
+      "fields": null,
+      "methods": null,
+      "columns": null,
+      "label": "d",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N1",
+      "italic": false,
+      "bold": true,
+      "underline": false,
+      "labelWidth": 9,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "zIndex": 0,
+      "level": 1
+    }
+  ],
+  "connections": [
+    {
+      "id": "(a <-> b)[0]",
+      "src": "a",
+      "srcArrow": "box",
+      "dst": "b",
+      "dstArrow": "box",
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "stroke": "B1",
+      "borderRadius": 10,
+      "label": "box",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N2",
+      "italic": true,
+      "bold": false,
+      "underline": false,
+      "labelWidth": 25,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "labelPercentage": 0,
+      "link": "",
+      "route": [
+        {
+          "x": 38.5,
+          "y": 78
+        },
+        {
+          "x": 38.5,
+          "y": 239
+        }
+      ],
+      "animated": false,
+      "tooltip": "",
+      "icon": null,
+      "zIndex": 0
+    },
+    {
+      "id": "(c <-> d)[0]",
+      "src": "c",
+      "srcArrow": "filled-box",
+      "dst": "d",
+      "dstArrow": "filled-box",
+      "opacity": 1,
+      "strokeDash": 0,
+      "strokeWidth": 2,
+      "stroke": "B1",
+      "borderRadius": 10,
+      "label": "filled-box",
+      "fontSize": 16,
+      "fontFamily": "DEFAULT",
+      "language": "",
+      "color": "N2",
+      "italic": true,
+      "bold": false,
+      "underline": false,
+      "labelWidth": 63,
+      "labelHeight": 21,
+      "labelPosition": "INSIDE_MIDDLE_CENTER",
+      "labelPercentage": 0,
+      "link": "",
+      "route": [
+        {
+          "x": 112,
+          "y": 78
+        },
+        {
+          "x": 112,
+          "y": 239
+        }
+      ],
+      "animated": false,
+      "tooltip": "",
+      "icon": null,
+      "zIndex": 0
+    }
+  ],
+  "root": {
+    "id": "",
+    "type": "",
+    "pos": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0,
+    "height": 0,
+    "opacity": 0,
+    "strokeDash": 0,
+    "strokeWidth": 0,
+    "borderRadius": 0,
+    "fill": "N7",
+    "stroke": "",
+    "animated": false,
+    "shadow": false,
+    "3d": false,
+    "multiple": false,
+    "double-border": false,
+    "tooltip": "",
+    "link": "",
+    "icon": null,
+    "iconPosition": "",
+    "blend": false,
+    "fields": null,
+    "methods": null,
+    "columns": null,
+    "label": "",
+    "fontSize": 0,
+    "fontFamily": "",
+    "language": "",
+    "color": "",
+    "italic": false,
+    "bold": false,
+    "underline": false,
+    "labelWidth": 0,
+    "labelHeight": 0,
+    "zIndex": 0,
+    "level": 0
+  }
+}