1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
// Copyright 2024 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hugocontext
import (
"bytes"
"fmt"
"strconv"
"github.com/gohugoio/hugo/bufferpool"
"github.com/gohugoio/hugo/markup/goldmark/internal/render"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/text"
"github.com/yuin/goldmark/util"
)
func New() goldmark.Extender {
return &hugoContextExtension{}
}
// Wrap wraps the given byte slice in a Hugo context that used to determine the correct Page
// in .RenderShortcodes.
func Wrap(b []byte, pid uint64) string {
buf := bufferpool.GetBuffer()
defer bufferpool.PutBuffer(buf)
buf.Write(prefix)
buf.WriteString(" pid=")
buf.WriteString(strconv.FormatUint(pid, 10))
buf.Write(endDelim)
buf.WriteByte('\n')
buf.Write(b)
buf.Write(prefix)
buf.Write(closingDelimAndNewline)
return buf.String()
}
var kindHugoContext = ast.NewNodeKind("HugoContext")
// HugoContext is a node that represents a Hugo context.
type HugoContext struct {
ast.BaseInline
Closing bool
// Internal page ID. Not persisted.
Pid uint64
}
// Dump implements Node.Dump.
func (n *HugoContext) Dump(source []byte, level int) {
m := map[string]string{}
m["Pid"] = fmt.Sprintf("%v", n.Pid)
ast.DumpHelper(n, source, level, m, nil)
}
func (n *HugoContext) parseAttrs(attrBytes []byte) {
keyPairs := bytes.Split(attrBytes, []byte(" "))
for _, keyPair := range keyPairs {
kv := bytes.Split(keyPair, []byte("="))
if len(kv) != 2 {
continue
}
key := string(kv[0])
val := string(kv[1])
switch key {
case "pid":
pid, _ := strconv.ParseUint(val, 10, 64)
n.Pid = pid
}
}
}
func (h *HugoContext) Kind() ast.NodeKind {
return kindHugoContext
}
var (
prefix = []byte("{{__hugo_ctx")
endDelim = []byte("}}")
closingDelimAndNewline = []byte("/}}\n")
)
var _ parser.InlineParser = (*hugoContextParser)(nil)
type hugoContextParser struct{}
func (s *hugoContextParser) Parse(parent ast.Node, block text.Reader, pc parser.Context) ast.Node {
line, _ := block.PeekLine()
if !bytes.HasPrefix(line, prefix) {
return nil
}
end := bytes.Index(line, endDelim)
if end == -1 {
return nil
}
block.Advance(end + len(endDelim) + 1) // +1 for the newline
if line[end-1] == '/' {
return &HugoContext{Closing: true}
}
attrBytes := line[len(prefix)+1 : end]
h := &HugoContext{}
h.parseAttrs(attrBytes)
return h
}
func (a *hugoContextParser) Trigger() []byte {
return []byte{'{'}
}
type hugoContextRenderer struct{}
func (r *hugoContextRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(kindHugoContext, r.handleHugoContext)
}
func (r *hugoContextRenderer) handleHugoContext(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
if !entering {
return ast.WalkContinue, nil
}
hctx := node.(*HugoContext)
ctx, ok := w.(*render.Context)
if !ok {
return ast.WalkContinue, nil
}
if hctx.Closing {
_ = ctx.PopPid()
} else {
ctx.PushPid(hctx.Pid)
}
return ast.WalkContinue, nil
}
type hugoContextExtension struct{}
func (a *hugoContextExtension) Extend(m goldmark.Markdown) {
m.Parser().AddOptions(
parser.WithInlineParsers(
util.Prioritized(&hugoContextParser{}, 50),
),
)
m.Renderer().AddOptions(
renderer.WithNodeRenderers(
util.Prioritized(&hugoContextRenderer{}, 50),
),
)
}
|
