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૮༼⚆︿⚆༽つ 2025-05-15 22:25:28 -03:00 committed by GitHub
commit d555ed9180
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9 changed files with 1357 additions and 5 deletions
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10
d2cli/export.go
View file

@ -13,15 +13,17 @@ const PNG exportExtension = ".png"
const PPTX exportExtension = ".pptx"
const PDF exportExtension = ".pdf"
const SVG exportExtension = ".svg"
const ASCII exportExtension = ".txt"
var SUPPORTED_EXTENSIONS = []exportExtension{SVG, PNG, PDF, PPTX, GIF}
var SUPPORTED_EXTENSIONS = []exportExtension{ASCII, SVG, PNG, PDF, PPTX, GIF}
var STDOUT_FORMAT_MAP = map[string]exportExtension{
"png": PNG,
"svg": SVG,
"png": PNG,
"svg": SVG,
"ascii": ASCII,
}
var SUPPORTED_STDOUT_FORMATS = []string{"png", "svg"}
var SUPPORTED_STDOUT_FORMATS = []string{"png", "svg", "ascii"}
func getOutputFormat(stdoutFormatFlag *string, outputPath string) (exportExtension, error) {
if stdoutFormatFlag != nil && *stdoutFormatFlag != "" {

19
d2cli/main.go
View file

@ -28,6 +28,7 @@ import (
"oss.terrastruct.com/d2/d2parser"
"oss.terrastruct.com/d2/d2plugin"
"oss.terrastruct.com/d2/d2renderers/d2animate"
"oss.terrastruct.com/d2/d2renderers/d2ascii"
"oss.terrastruct.com/d2/d2renderers/d2fonts"
"oss.terrastruct.com/d2/d2renderers/d2svg"
"oss.terrastruct.com/d2/d2renderers/d2svg/appendix"
@ -103,7 +104,7 @@ func Run(ctx context.Context, ms *xmain.State) (err error) {
if err != nil {
return err
}
stdoutFormatFlag := ms.Opts.String("", "stdout-format", "", "", "output format when writing to stdout (svg, png). Usage: d2 input.d2 --stdout-format png - > output.png")
stdoutFormatFlag := ms.Opts.String("", "stdout-format", "", "", "output format when writing to stdout (svg, png, ascii). Usage: d2 input.d2 --stdout-format png - > output.png")
if err != nil {
return err
}
@ -870,6 +871,22 @@ func renderSingle(ctx context.Context, ms *xmain.State, compileDur time.Duration
}
func _render(ctx context.Context, ms *xmain.State, plugin d2plugin.Plugin, opts d2svg.RenderOpts, inputPath, outputPath string, bundle, forceAppendix bool, page playwright.Page, ruler *textmeasure.Ruler, diagram *d2target.Diagram, outputFormat exportExtension) ([]byte, error) {
if outputFormat == ASCII {
renderOpts := &d2ascii.RenderOpts{
Pad: opts.Pad,
Scale: opts.Scale,
}
ascii, err := d2ascii.Render(diagram, renderOpts)
if err != nil {
return ascii, err
}
err = Write(ms, outputPath, ascii)
if err != nil {
return ascii, err
}
return ascii, nil
}
toPNG := outputFormat == PNG
var scale *float64

535
d2renderers/d2ascii/d2ascii.go Normal file
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@ -0,0 +1,535 @@
package d2ascii
import (
"bytes"
"math"
"strings"
"oss.terrastruct.com/d2/d2target"
)
// RenderOpts contains options for ASCII rendering
type RenderOpts struct {
Pad *int64 // Optional padding around the diagram
Scale *float64 // Pixels per ASCII character ratio
}
// Render converts a D2 diagram into ASCII art
func Render(diagram *d2target.Diagram, opts *RenderOpts) ([]byte, error) {
if opts == nil {
opts = &RenderOpts{}
}
// Default padding matching d2svg
pad := int(8)
if opts.Pad != nil {
pad = int(*opts.Pad)
}
// Scale for converting diagram coordinates to ASCII grid
// Default: roughly 1 ASCII char = 8x4 pixels
scale := struct{ x, y float64 }{8, 4}
if opts.Scale != nil {
s := *opts.Scale
scale.x = s
scale.y = s / 2 // Maintain aspect ratio
}
// Calculate canvas dimensions
tl, br := diagram.NestedBoundingBox()
width := int(math.Ceil(float64(br.X-tl.X+(pad*2)) / scale.x))
height := int(math.Ceil(float64(br.Y-tl.Y+(pad*2)) / scale.y))
// Create ASCII canvas
canvas := NewCanvas(width, height)
canvas.setScale(scale.x, scale.y)
canvas.setOffset(-int(tl.X), -int(tl.Y))
canvas.setPad(pad)
// Draw connections
for _, conn := range diagram.Connections {
err := canvas.drawConnection(conn)
if err != nil {
return nil, err
}
}
// Draw shapes
for _, shape := range diagram.Shapes {
err := canvas.drawShape(shape)
if err != nil {
return nil, err
}
}
canvas.ReScale(canvas.w, canvas.AutoHeight())
return canvas.TrimBytes(), nil
}
// Canvas handles the ASCII grid and drawing operations
type TextPosition struct {
x, y, w, h int
text string
}
type Canvas struct {
grid [][]rune
w, h int
// Coordinate transformation
scaleX, scaleY float64
offsetX, offsetY int
pad int
// Track text positions
textPositions []TextPosition
}
func NewCanvas(w, h int) *Canvas {
grid := make([][]rune, h)
for i := range grid {
grid[i] = make([]rune, w)
for j := range grid[i] {
grid[i][j] = ' '
}
}
return &Canvas{
grid: grid,
w: w,
h: h,
}
}
func (c *Canvas) setScale(x, y float64) {
c.scaleX = x
c.scaleY = y
}
func (c *Canvas) setOffset(x, y int) {
c.offsetX = x
c.offsetY = y
}
func (c *Canvas) setPad(pad int) {
c.pad = pad
}
// transformPoint converts diagram coordinates to ASCII grid coordinates
func (c *Canvas) transformPoint(x, y int) (int, int) {
x = int(float64(x+c.offsetX+c.pad) / c.scaleX)
y = int(float64(y+c.offsetY+c.pad) / c.scaleY)
return x, y
}
func (c *Canvas) drawShape(shape d2target.Shape) error {
x, y := c.transformPoint(int(shape.Pos.X), int(shape.Pos.Y))
w := int(float64(shape.Width) / c.scaleX)
h := int(float64(shape.Height) / c.scaleY)
switch shape.Type {
case d2target.ShapeCircle:
return c.drawCircle(x, y, w, h, shape.Label)
case d2target.ShapeSquare:
return c.drawRect(x, y, w, h, shape.Label)
// Add more shape types as needed
default:
return c.drawRect(x, y, w, h, shape.Label)
}
}
func (c *Canvas) drawRect(x, y, w, h int, label string) error {
// Draw corners
c.set(x, y, '+')
c.set(x+w, y, '+')
c.set(x, y+h, '+')
c.set(x+w, y+h, '+')
// Draw horizontal edges
for i := x + 1; i < x+w; i++ {
c.set(i, y, '-')
c.set(i, y+h, '-')
}
// Draw vertical edges
for i := y + 1; i < y+h; i++ {
c.set(x, i, '|')
c.set(x+w, i, '|')
}
// Draw label
if label != "" {
c.drawCenteredText(x+1, y+1, w-1, h-1, label)
}
return nil
}
func (c *Canvas) drawCircle(x, y, w, h int, label string) error {
// Approximate circle with ASCII characters
c.set(x+w/2, y, '.')
c.set(x+w/2, y+h, '\'')
c.set(x, y+h/2, '(')
c.set(x+w, y+h/2, ')')
if label != "" {
c.drawCenteredText(x+1, y+1, w-1, h-1, label)
}
return nil
}
func (c *Canvas) drawConnection(conn d2target.Connection) error {
points := make([]struct{ x, y int }, len(conn.Route))
for i, p := range conn.Route {
points[i].x, points[i].y = c.transformPoint(int(p.X), int(p.Y))
}
// Draw lines between points
for i := range len(points) - 1 {
c.drawLine(points[i].x, points[i].y, points[i+1].x, points[i+1].y)
}
// Draw destination arrow if needed
if len(points) >= 2 && conn.DstArrow != d2target.NoArrowhead {
end, prev := points[len(points)-1], points[len(points)-2]
// Calculate angle for arrow direction
dx := float64(end.x - prev.x)
dy := float64(end.y - prev.y)
angle := math.Atan2(dy, dx)
// Determine arrow character and offsets based on angle
var arrow rune
var mx, my int
switch {
case angle > -math.Pi/4 && angle <= math.Pi/4:
arrow = '>'
mx = -1 // Move left
my = 0
case angle > math.Pi/4 && angle <= 3*math.Pi/4:
arrow = 'v'
mx = 0
my = -1 // Move up
case angle > 3*math.Pi/4 || angle <= -3*math.Pi/4:
arrow = '<'
mx = 1 // Move right
my = 0
default: // -3*math.Pi/4 < angle <= -math.Pi/4 (upward)
arrow = '^'
mx = 0
my = 1 // Move down
}
c.set(end.x+mx, end.y+my, arrow)
}
return nil
}
func (c *Canvas) drawLine(x1, y1, x2, y2 int) {
// Draw horizontal line
if y1 == y2 {
for x := min(x1, x2); x <= max(x1, x2); x++ {
c.set(x, y1, '-')
}
return
}
// Draw vertical line
if x1 == x2 {
for y := min(y1, y2); y <= max(y1, y2); y++ {
c.set(x1, y, '|')
}
return
}
// Draw diagonal line
dx := abs(x2 - x1)
dy := abs(y2 - y1)
steep := dy > dx
if steep {
x1, y1 = y1, x1
x2, y2 = y2, x2
}
if x1 > x2 {
x1, x2 = x2, x1
y1, y2 = y2, y1
}
dx = x2 - x1
dy = abs(y2 - y1)
err := dx / 2
ystep := 1
if y1 >= y2 {
ystep = -1
}
for ; x1 <= x2; x1++ {
if steep {
c.set(y1, x1, '|')
} else {
c.set(x1, y1, '/')
}
err -= dy
if err < 0 {
y1 += ystep
err += dx
}
}
}
func (c *Canvas) drawCenteredText(x, y, w, h int, text string) {
// Record position first
c.textPositions = append(c.textPositions, TextPosition{x, y, w, h, text})
lines := strings.Split(text, "\n")
startY := y + (h-len(lines))/2
for i, line := range lines {
if startY+i >= c.h {
break
}
startX := x + (w-len(line))/2
for j, ch := range line {
if startX+j >= c.w {
break
}
c.set(startX+j, startY+i, ch)
}
}
}
func (c *Canvas) set(x, y int, ch rune) {
if x >= 0 && x < c.w && y >= 0 && y < c.h {
c.grid[y][x] = ch
}
}
func (c *Canvas) Bytes() []byte {
var buf bytes.Buffer
for _, row := range c.grid {
buf.WriteString(string(row))
buf.WriteByte('\n')
}
return buf.Bytes()
}
// TrimBytes removes excess whitespace from all sides of the ASCII output
func (c *Canvas) TrimBytes() []byte {
// Find bounds of content
minX, minY, maxX, maxY := c.w, c.h, 0, 0
// Scan for content bounds
for y := 0; y < c.h; y++ {
for x := 0; x < c.w; x++ {
if c.grid[y][x] != ' ' {
if x < minX {
minX = x
}
if x > maxX {
maxX = x
}
if y < minY {
minY = y
}
if y > maxY {
maxY = y
}
}
}
}
// If no content found, return empty
if minX > maxX || minY > maxY {
return []byte{}
}
// Create trimmed output
var buf bytes.Buffer
for y := minY; y <= maxY; y++ {
buf.WriteString(string(c.grid[y][minX : maxX+1]))
buf.WriteByte('\n')
}
return buf.Bytes()
}
func (c *Canvas) AutoHeight() int {
currY := 0
mapping := make(map[int]int)
for i, label := range c.textPositions {
lines := strings.Split(label.text, "\n")
minHeight := len(lines) + 2 // +border
if i == 0 {
mapping[label.y] = 0
currY = minHeight + 2
continue
}
mapping[label.y] = currY + 3 // +spacing
currY = mapping[label.y] + minHeight
}
maxH := 0
for _, label := range c.textPositions {
newY := mapping[label.y]
lines := strings.Split(label.text, "\n")
boxHeight := len(lines) + 2 // +border
maxH = max(maxH, newY+boxHeight)
}
return maxH
}
func isArrowHead(ch rune) bool {
return ch == '>' || ch == '<' || ch == '^' || ch == 'v'
}
// ReScale reduces the size of ASCII art using a pixel-like sampling technique
func (c *Canvas) ReScale(targetWidth, targetHeight int) {
scaleX := float64(targetWidth) / float64(c.w)
scaleY := float64(targetHeight) / float64(c.h)
// Create new grid
newGrid := make([][]rune, targetHeight)
for i := range newGrid {
newGrid[i] = make([]rune, targetWidth)
for j := range newGrid[i] {
newGrid[i][j] = ' '
}
}
// First pass: scale borders and lines, but skip arrow heads
for y := range c.h {
targetY := int(float64(y) * scaleY)
if targetY >= targetHeight {
continue
}
for x := range c.w {
targetX := int(float64(x) * scaleX)
if targetX >= targetWidth {
continue
}
ch := c.grid[y][x]
if !isArrowHead(ch) && (ch == '+' || ch == '-' || ch == '|' || ch == '/' || ch == '\\') {
newGrid[targetY][targetX] = ch
}
}
}
// Second pass: copy arrow heads with position adjustment
for y := range c.h {
targetY := int(float64(y) * scaleY)
if targetY >= targetHeight {
continue
}
for x := range c.w {
targetX := int(float64(x) * scaleX)
if targetX >= targetWidth {
continue
}
ch := c.grid[y][x]
if isArrowHead(ch) {
// Determine offset based on arrow direction
var dx, dy int
switch ch {
case '>':
dx = -1
case '<':
dx = 1
case 'v':
dy = -1
case '^':
dy = 1
}
// Apply offset and ensure we stay within bounds
finalX := min(max(0, targetX+dx), targetWidth-1)
finalY := min(max(0, targetY+dy), targetHeight-1)
// Only place arrow if target position is empty or has a line character
if newGrid[finalY][finalX] == ' ' || newGrid[finalY][finalX] == '-' || newGrid[finalY][finalX] == '|' {
newGrid[finalY][finalX] = ch
}
}
}
}
// Third pass: redraw text at scaled positions
for _, label := range c.textPositions {
// Get box dimensions in source coordinates first
srcBoxCenterY := label.y + label.h/2
// Split text into lines
lines := strings.Split(label.text, "\n")
textHeight := len(lines)
// Calculate text start Y in source coordinates
srcStartY := srcBoxCenterY - textHeight/2
// Scale to target coordinates
newX := int(float64(label.x) * scaleX)
newY := int(float64(srcStartY) * scaleY)
newW := int(float64(label.w) * scaleX)
// Draw each line centered horizontally
for i, line := range lines {
targetY := newY + i
if targetY >= targetHeight {
break
}
if targetY < 0 {
continue
}
// Center text horizontally within the scaled box
startX := newX + (newW-len(line))/2
for j, ch := range line {
targetX := startX + j
if targetX >= targetWidth {
break
}
if targetX < 0 {
continue
}
// Only overwrite if not an arrow head and not a border
existing := newGrid[targetY][targetX]
if !isArrowHead(existing) && existing != '+' && existing != '-' &&
existing != '|' && existing != '/' && existing != '\\' {
newGrid[targetY][targetX] = ch
}
}
}
}
c.grid = newGrid
c.w = targetWidth
c.h = targetHeight
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
func abs(x int) int {
if x < 0 {
return -x
}
return x
}

29
docs/examples/chess/dia.txt Normal file
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@ -0,0 +1,29 @@
|-----------------|
| Hans Niemann |
///////////+---||--------||--+//////
||////////// |||| ^ ^ ||| ///////|
||||| || || ||
v || | ||
|-----------------------|----------------------|| ||
| |------------------| || |
| | Magnus Carlsen | || |
| +---------|--------+ || |
| | || |
| | || |
| v || |
| |---------------------| || |
| | Play Magnus Group | || |
| +----------|----------+ || |
| | || |
| || defendants |||| |
| |||| v //////|| | |
| |--------------|///// | |
| | Chess.com | | |
| +-------|------+ | |
| | | |
| || | ||||
| ||| v | /////////|
| |--------------------|///|///
| | Hikaru Nakamura | |
| +--------------------+ |
+----------------------------------------------+

24
docs/examples/flipt/output.txt Normal file
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@ -0,0 +1,24 @@
+--------------------------------------------------------+
| |
| |-------------------------------------------------| |
| | | |
| | | |
| | |----| |----| |----| |----| | | +--------------------------------+
| | | | | | | | | | | | | |
| | +----+ +----+ +----+ +----+ | | | |-------| |
|------------------------------------------------------------------| | | | | | | | |
| +----------+ | | | |----| |----| |----| |----| | | | ||//---> | | |
| | | | | | | | | | | | | | | | | ||| +-------+ |
| ///---> | linked |----///| | | | +----+ +----+ +----+ +----+ | | | |----|| |
| |||| | | |||||-----------| | | | Test |--|-----------------|-> | | Release |
| |----------| +----------+ | | | | | |----| |----| |----| |----| | | | +----+|| +-------+ |
| | source | Build | |--|-----------------|-> | | | | | | | | | | | | ||| | | |
| | | | | | | | +----+ +----+ +----+ +----+ | | | ///---> | | |
| +----------+||| |----------| ||| | | | | | | | | | |
| |///---> | assets |----///||| +-----------+ | | | |----| |----| |----| |----| | | | +-------+ |
| | | | | | | | | | | | | | | | +--------------------------------+
| +----------+ | | | +----+ +----+ +----+ +----+ | |
+------------------------------------------------------------------+ | | | |
| | | |
| +-------------------------------------------------+ |
+--------------------------------------------------------+

241
docs/examples/japan-grid/japan.txt Normal file
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@ -0,0 +1,241 @@
|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
| || | | || | || | | || | | |
| || | | || | || | | || | | |
| || | | || | || | | || | | |
| || | | || | || | | || | | |
| || | | || | || | | || | | |
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| || | | || | || | | || | | |
| || | | || | || | | || | | |
| || | | || | || | | || | | |
| || | | || | || | | || | | 北 海 道 |
| || | | || | || | | || | | |
| || | | || | || | | || | | |
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| || | | || | || | | || | | |
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|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
| || | | || | || | | || | | |
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|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
| || | | || | || | | || | | |
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| || | | || | || | | || | 青 森 | |
| || | | || | || | | || | | |
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|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
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| || | | || | || | | || | 秋 田 | 岩 手 |
| || | | || | || | | || | | |
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|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
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| || | | || | || | 石 川 | || 新 潟 | 山 形 | 宮 城 |
| || | | || | || | | || | | |
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|-----------||------------|-----------|-----------||-----------|-----------||------------|-----------|-----------||-----------|------------|------------|
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| || | | || | || | | || | | |
| || | | || | || | 福 井 | 富 山 || 群 馬 | 栃 木 | 福 島 |
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+---------------+ +---------------+ +---------------+
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+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| | +--------+--------++-----------+-----++-----------+--------++--------+ | | | | | || | || | | | | | +--------+--------++-----------+------+-----------++--------+--------+ | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | 0.61 || 0.77 | 0.59 || 0.83 | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
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| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
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| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || - | || | || | | | | | | || | || | | | | | | | || - | | || | | | |
| | | 0.62 | 0.15 ||-----------|zen V||---------> | 0.91 || 0.48 | | | | | | || | || | | | | | | 0.62 | 0.15 ||-----------|zem Ve|-----------|| 0.91 | 0.48 | | |
| | | | || | || | || | | | | | | || | || | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | +-----------++-----------+-----------++-----------+ | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | | | | | | || | | || | | | |
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| | | | || | || | || | | | | | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | | | | | | || | | || | | | |
| | | | || | || | || | | | | | | | | | | | || | | || | | | |
| | +--------+--------++-----------+-----++-----------+--------++--------+ | | | | | | | | +--------+--------++-----------+------+-----------++--------+--------+ | |
| | | | | | | | | | | |
| | | | | | | | | | | |
| | | | | | | | | | | |
| | | | | | | | | | | |
| | | | | | | | | | | |
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| | | | | | | | | | | |
| | | | | | | | | | | |
| | | | | | | | | | | |
| +-----------------------------------------------------------------------------------+ +---------------------------+ +----------------------------------------------------------------+ +-----------+ +-----------------------------------------------------------------------------------+ |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

41
docs/flow.txt Normal file
View file

@ -0,0 +1,41 @@
|------------|
| inputFile |
+------|-----+
|
v
|------------|
| d2parser |
+------|-----+
|
|
v
|---------|
| d2ast |
+----|----+
|
v
|--------------|
| d2compiler |
+-------|------+
|
v
|
|------------|
| d2graph |
+-----|------+
|
v
|---------------------------|
| d2layouts/d2dagrelayout |
+-------------|-------------+
|
v
+--------------+
| |
| d2exporter |
+-------|------+
|
v
|------------|
| d2target |
+------------+