dump.go

     1  // Copyright 2024 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package relnote
     6  
     7  import (
     8  	"fmt"
     9  	"strings"
    10  
    11  	md "rsc.io/markdown"
    12  )
    13  
    14  // DumpMarkdown writes the internal structure of a markdown
    15  // document to standard output.
    16  // It is intended for debugging.
    17  func DumpMarkdown(d *md.Document) {
    18  	dumpBlocks(d.Blocks, 0)
    19  }
    20  
    21  func dumpBlocks(bs []md.Block, depth int) {
    22  	for _, b := range bs {
    23  		dumpBlock(b, depth)
    24  	}
    25  }
    26  
    27  func dumpBlock(b md.Block, depth int) {
    28  	typeName := strings.TrimPrefix(fmt.Sprintf("%T", b), "*markdown.")
    29  	dprintf(depth, "%s\n", typeName)
    30  	switch b := b.(type) {
    31  	case *md.Paragraph:
    32  		dumpInlines(b.Text.Inline, depth+1)
    33  	case *md.Heading:
    34  		dumpInlines(b.Text.Inline, depth+1)
    35  	case *md.List:
    36  		dumpBlocks(b.Items, depth+1)
    37  	case *md.Item:
    38  		dumpBlocks(b.Blocks, depth+1)
    39  	default:
    40  		// TODO(jba): additional cases as needed.
    41  	}
    42  }
    43  
    44  func dumpInlines(ins []md.Inline, depth int) {
    45  	for _, in := range ins {
    46  		switch in := in.(type) {
    47  		case *md.Plain:
    48  			dprintf(depth, "Plain(%q)\n", in.Text)
    49  		case *md.Code:
    50  			dprintf(depth, "Code(%q)\n", in.Text)
    51  		case *md.Link:
    52  			dprintf(depth, "Link:\n")
    53  			dumpInlines(in.Inner, depth+1)
    54  			dprintf(depth+1, "URL: %q\n", in.URL)
    55  		case *md.Strong:
    56  			dprintf(depth, "Strong(%q):\n", in.Marker)
    57  			dumpInlines(in.Inner, depth+1)
    58  		case *md.Emph:
    59  			dprintf(depth, "Emph(%q):\n", in.Marker)
    60  			dumpInlines(in.Inner, depth+1)
    61  		case *md.Del:
    62  			dprintf(depth, "Del(%q):\n", in.Marker)
    63  			dumpInlines(in.Inner, depth+1)
    64  		default:
    65  			fmt.Printf("%*s%#v\n", depth*4, "", in)
    66  		}
    67  	}
    68  }
    69  
    70  func dprintf(depth int, format string, args ...any) {
    71  	fmt.Printf("%*s%s", depth*4, "", fmt.Sprintf(format, args...))
    72  }
    73
View as plain text