/
token.go
1127 lines (967 loc) · 31.7 KB
/
token.go
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package lex
import (
"bytes"
"encoding/json"
"fmt"
"regexp"
"strings"
)
type Token struct {
Type string `json:"type"`
Raw string `json:"raw"`
Text string `json:"text"`
// list
Ordered bool `json:"ordered,omitempty"`
Start string `json:"start,omitempty"`
Loose bool `json:"loose,omitempty"`
Task bool `json:"task,omitempty"`
Items []Token `json:"items,omitempty"`
Checked string `json:"checked,omitempty"`
// heading
Depth int `json:"depth,omitempty"`
// link
Href string `json:"href,omitempty"`
Title string `json:"title,omitempty"`
// def
Tag string `json:"tag,omitempty"`
Tokens []Token `json:"tokens,omitempty"`
// table
Header []string `json:"header,omitempty"`
Align []string `json:"align,omitempty"`
Cells [][]string `json:"cells,omitempty"`
Elements struct {
Header [][]Token `json:"header,omitempty"`
Cells [][][]Token `json:"cells,omitempty"`
} `json:"elements,omitempty"`
}
func (t Token) String() string {
var buf bytes.Buffer
encoder := json.NewEncoder(&buf)
encoder.SetIndent("", " ")
encoder.Encode(t)
return buf.String()
}
var (
// block
block_newline = `^\n+`
block_code = `^( {4}[^\n]+\n*)+`
//^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)
block_fences = `^ {0,3}($1{3,}(?=[^$1\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~$1]* *(?:\n+|$)|$)`
block_hr = `^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)`
block_heading = `^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)`
block_blockquote = `^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+`
block_list = `^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)`
block_def = `^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)`
block_lheading = `^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)`
block__paragraph = `^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list)[^\n]+)*)`
block_text = `^[^\n]+`
block__label = `(?!\s*\])(?:\\[\[\]]|[^\[\]])+`
block__title = `(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))`
block_bullet = `(?:[*+-]|\d{1,9}[.)])`
block_item = `^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*`
block__comment = `<!--(?!-?>)[\s\S]*?-->`
block_gfm_nptable = `^ *([^|\n ].*\|.*)\n` + // Header
` *([-:]+ *\|[-| :]*)` + // Algin
`(?:\n((?:(?!\n|hr|heading|blockquote|code|fences|list).*(?:\n|$))*)\n*|$)` // Cells
block_gfm_table = `^ *\|(.+)\n` + // Header
` *\|?( *[-:]+[-| :]*)` + // Align
`(?:\n *((?:(?!\n|hr|heading|blockquote|code|fences|list).*(?:\n|$))*)\n*|$)` // Cells
// inline
// ^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])
inline_escape = `^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_$1{|}~])`
inline_autolink = `^<(scheme:[^\s\x00-\x1f<>]*|email)>`
inline_tag = `^comment` +
`|^</[a-zA-Z][\w:-]*\s*>` +
`|^<[a-zA-Z][\w-]*(?:attribute)*?\s*/?>` +
`|^<\?[\s\S]*?\?>` +
`|^<![a-zA-Z]+\s[\s\S]*?>` +
`|^<!\[CDATA\[[\s\S]*?\]\]>`
inline_link = `^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)`
inline_reflink = `^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]`
inline_nolink = `^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?`
inline_reflinkSearch = `reflink|nolink(?!\()`
inline_strong_start = `^(?:(\*\*(?=[*punctuation]))|\*\*)(?![\s])|__`
inline_strong_middle = `^\*\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*\*$|^__(?![\s])((?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?)__$`
inline_strong_endAst = `[^punctuation\s]\*\*(?!\*)|[punctuation]\*\*(?!\*)(?:(?=[punctuation\s]|$))`
inline_strong_endUnd = `[^\s]__(?!_)(?:(?=[punctuation\s])|$)`
inline_em_start = `^(?:(\*(?=[punctuation]))|\*)(?![*\s])|_`
inline_em_middle = `^\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*$|^_(?![_\s])(?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?_$`
inline_em_endAst = `[^punctuation\s]\*(?!\*)|[punctuation]\*(?!\*)(?:(?=[punctuation\s]|$))`
inline_em_endUnd = `[^\s]_(?!_)(?:(?=[punctuation\s])|$)`
// ^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)
inline_code = `^($1+)([^$1]|[^$1][\s\S]*?[^$1])\1(?!$1)`
inline_br = `^( {2,}|\\)\n(?!\s*$)`
// ^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))
inline_text = `^($1+|[^$1])(?:[\s\S]*?(?:(?=[\\<!\[$1*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))`
inline_punctuation = `^([\s*punctuation])`
// !"#$%&\'()+\-.,/:;<=>?@\[\]`^{|}~
inline__punctuation = `!"#$%&'()+\-.,/:;<=>?@\[\]$1^{|}~`
// \\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>
inline__blockSkip = `\[[^\]]*?\]\([^\)]*?\)|$1[^$1]*?$1|<[^>]*?>`
inline__overlapSkip = `__[^_]*?__|\*\*\[^\*\]*?\*\*`
// \\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])
inline__escapes = `\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_$1{|}~])`
inline__scheme = `[a-zA-Z][a-zA-Z0-9+.-]{1,31}`
// [a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])
inline__email = `[a-zA-Z0-9.!#$%&'*+/=?^_$1{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])`
// \s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?
inline__attribute = `\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>$1]+)?`
// (?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?
inline__label = `(?:\[(?:\\.|[^\[\]\\])*\]|\\.|$1[^$1]*$1|[^\[\]\\$1])*?`
inline__href = `<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*`
inline__title = `"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)`
inline_gfm__extended_email = `[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])`
inline_gfm_url = `^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email`
inline_gfm__backpedal = `(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+`
inline_gfm_del = `^~+(?=\S)([\s\S]*?\S)~+`
// ^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))
inline_gfm_text = `^($1+|[^$1])(?:[\s\S]*?(?:(?=[\<!\[$1*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_$1{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_$1{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_$1{\|}~-]+@))`
)
//gfm: true,
//headerIds: true,
//mangle: true,
var (
block map[string]*Regex
inline map[string]*Regex
)
func initBlock() {
block_fences = strings.Replace(block_fences, "$1", "`", -1)
block = make(map[string]*Regex)
option := Options(RE2)
block["newline"] = MustCompile(block_newline, option)
block["code"] = MustCompile(block_code, option)
block["fences"] = MustCompile(block_fences, option)
block["hr"] = MustCompile(block_hr, option)
block["heading"] = MustCompile(block_heading, option)
block["list"] = MustCompile(block_list, option)
block["def"] = MustCompile(block_def, option)
block["lheading"] = MustCompile(block_lheading, option)
block["text"] = MustCompile(block_text, option)
block["_label"] = MustCompile(block__label, option)
block["_title"] = MustCompile(block__title, option)
block["def"] = edit(block["def"]).
replace("label", block["_label"].String()).
replace("title", block["_title"].String()).
getRegex()
block["item"] = MustCompile(block_item, option)
block["bullet"] = MustCompile(block_bullet, option)
block["item"] = edit(block["item"], Global|Multiline).
replace("bull", block["bullet"].String()).
getRegex()
block["list"] = MustCompile(block_list, option)
block["list"] = edit(block["list"]).
replace("bull", block["bullet"].String()).
replace("hr", "\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))").
replace("def", "\\n+(?="+block["def"].String()+")").
getRegex()
block["_comment"] = MustCompile(block__comment, option)
block["_paragraph"] = MustCompile(block__paragraph, option)
block["paragraph"] = edit(block["_paragraph"]).
replace("hr", block["hr"].String()).
replace("heading", " {0,3}#{1,6} ").
replace("|lheading", ""). // setex headings don't interrupt commonmark paragraphs
replace("blockquote", " {0,3}>").
replace("fences", " {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n").
replace("list", " {0,3}(?:[*+-]|1[.)]) "). // only lists starting from 1 can interrupt
getRegex()
block["blockquote"] = MustCompile(block_blockquote, option)
block["blockquote"] = edit(block["blockquote"]).
replace("paragraph", block["paragraph"].String()).
getRegex()
}
func initLine() {
inline_escape = strings.ReplaceAll(inline_escape, "$1", "`")
inline_code = strings.ReplaceAll(inline_code, "$1", "`")
inline_text = strings.ReplaceAll(inline_text, "$1", "`")
inline__punctuation = strings.ReplaceAll(inline__punctuation, "$1", "`")
inline__blockSkip = strings.ReplaceAll(inline__blockSkip, "$1", "`")
inline__escapes = strings.ReplaceAll(inline__escapes, "$1", "`")
inline__email = strings.ReplaceAll(inline__email, "$1", "`")
inline__attribute = strings.ReplaceAll(inline__attribute, "$1", "`")
inline__label = strings.ReplaceAll(inline__label, "$1", "`")
inline = make(map[string]*Regex)
option := Options(RE2)
inline["escape"] = MustCompile(inline_escape, option)
inline["autolink"] = MustCompile(inline_autolink, option)
inline["tag"] = MustCompile(inline_tag, option)
inline["link"] = MustCompile(inline_link, option)
inline["reflink"] = MustCompile(inline_reflink, option)
inline["nolink"] = MustCompile(inline_nolink, option)
inline["strong_start"] = MustCompile(inline_strong_start, option)
inline["strong_middle"] = MustCompile(inline_strong_middle, option)
inline["strong_endAst"] = MustCompile(inline_strong_endAst, option)
inline["strong_endUnd"] = MustCompile(inline_strong_endUnd, option)
inline["em_start"] = MustCompile(inline_em_start, option)
inline["em_middle"] = MustCompile(inline_em_middle, option)
inline["em_endAst"] = MustCompile(inline_em_endAst, option)
inline["em_endUnd"] = MustCompile(inline_em_endUnd, option)
inline["code"] = MustCompile(inline_code, option)
inline["br"] = MustCompile(inline_br, option)
inline["text"] = MustCompile(inline_text, option)
inline["punctuation"] = MustCompile(inline_punctuation, option)
inline["_punctuation"] = MustCompile(inline__punctuation, option)
inline["punctuation"] = edit(inline["punctuation"]).
replace("punctuation", inline__punctuation).
getRegex()
inline["_blockSkip"] = MustCompile(inline__blockSkip, option)
inline["_overlapSkip"] = MustCompile(inline__overlapSkip, option)
inline["em_start"] = edit(inline["em_start"]).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["em_middle"] = edit(inline["em_middle"]).
replace("punctuation", inline["_punctuation"].String()).
replace("overlapSkip", inline["_overlapSkip"].String()).
getRegex()
inline["em_endAst"] = edit(inline["em_endAst"], Global).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["em_endUnd"] = edit(inline["em_endUnd"], Global).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["strong_start"] = edit(inline["strong_start"]).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["strong_middle"] = edit(inline["strong_middle"]).
replace("punctuation", inline["_punctuation"].String()).
replace("blockSkip", inline["_blockSkip"].String()).
getRegex()
inline["strong_endAst"] = edit(inline["strong_endAst"], Global).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["strong_endUnd"] = edit(inline["strong_endUnd"], Global).
replace("punctuation", inline["_punctuation"].String()).
getRegex()
inline["blockSkip"] = edit(inline["_blockSkip"], Global).
getRegex()
inline["overlapSkip"] = edit(inline["_overlapSkip"], Global).
getRegex()
inline["_escapes"] = MustCompile(inline__escapes, option|Global)
inline["_scheme"] = MustCompile(inline__scheme, option)
inline["_email"] = MustCompile(inline__email, option)
inline["autolink"] = edit(inline["autolink"]).
replace("scheme", inline["_scheme"].String()).
replace("email", inline["_email"].String()).
getRegex()
inline["_attribute"] = MustCompile(inline__attribute, option)
inline["tag"] = edit(inline["tag"]).
replace("comment", block["_comment"].String()).
replace("attribute", inline["_attribute"].String()).
getRegex()
inline["_label"] = MustCompile(inline__label, option)
inline["_href"] = MustCompile(inline__href, option)
inline["_title"] = MustCompile(inline__title, option)
inline["link"] = edit(inline["link"]).
replace("label", inline["_label"].String()).
replace("href", inline["_href"].String()).
replace("title", inline["_title"].String()).
getRegex()
inline["reflink"] = edit(inline_reflink).
replace("label", inline["_label"].String()).
getRegex()
inline["reflinkSearch"] = edit(inline_reflinkSearch, Global).
replace("reflink", inline["reflink"].String()).
replace("nolink", inline["nolink"].String()).
getRegex()
}
func initBlockGfm() map[string]*Regex {
normal := merge(block)
option := Options(RE2)
gfm := merge(normal, map[string]*Regex{
"nptable": MustCompile(block_gfm_nptable, option),
"table": MustCompile(block_gfm_table, option),
})
gfm["nptable"] = edit(gfm["nptable"]).
replace("hr", block["hr"].String()).
replace("heading", " {0,3}#{1,6} ").
replace("blockquote", " {0,3}>").
replace("code", " {4}[^\n]").
replace("fences", " {0,3}(?:`{3,}(?=[^`\n]*\n)|~{3,})[^\n]*\n").
replace("list", " {0,3}(?:[*+-]|1[.)]) ").
getRegex()
gfm["table"] = edit(gfm["table"]).
replace("hr", block["hr"].String()).
replace("heading", " {0,3}#{1,6} ").
replace("blockquote", " {0,3}>").
replace("code", " {4}[^\n]").
replace("fences", " {0,3}(?:`{3,}(?=[^`\n]*\n)|~{3,})[^\n]*\n").
replace("list", " {0,3}(?:[*+-]|1[.)]) ").
getRegex()
return gfm
}
func initInlineGfm(breaks bool) map[string]*Regex {
inline_gfm_text = strings.ReplaceAll(inline_gfm_text, "$1", "`")
normal := merge(inline)
option := Options(RE2)
gfm := merge(normal, map[string]*Regex{
"escape": edit(inline["escape"]).replace("])", "~|])").getRegex(),
"_extended_email": MustCompile(inline_gfm__extended_email, option),
"url": MustCompile(inline_gfm_url, option),
"_backpedal": MustCompile(inline_gfm__backpedal, option),
"del": MustCompile(inline_gfm_del, option),
"text": MustCompile(inline_gfm_text, option),
})
gfm["url"] = edit(gfm["url"], IgnoreCase).
replace("email", gfm["_extended_email"].String()).
getRegex()
if breaks {
gfm["br"] = edit(inline["br"]).replace("{2,}", "*").getRegex()
gfm["text"] = edit(gfm["text"]).
replace("\b_", "\b_| {2,}\n").
replace(`\{2,\}`, "*").
getRegex()
}
return gfm
}
func init() {
initBlock()
initLine()
}
func space(src []rune) (token Token, err error) {
match, err := block["newline"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).Runes()
if len(raw) > 1 {
return Token{
Type: "space",
Raw: string(raw),
Tokens: []Token{},
}, nil
}
return Token{
Raw: "\n",
Tokens: []Token{},
}, nil
}
func code(src []rune, tokens *[]Token) (token Token, err error) {
match, err := block["code"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
if len(*tokens) > 0 {
last := (*tokens)[len(*tokens)-1]
if last.Type == "paragraph" {
return Token{
Raw: raw,
Text: strings.TrimRight(raw, " "),
Tokens: []Token{},
}, nil
}
}
text := MustCompile(`^ {4}`, Multiline|Global).ReplaceStr(raw, "", 0, -1)
return Token{
Type: "code",
Raw: raw,
Text: strings.TrimRight(text, "\n"),
Tokens: []Token{},
}, nil
}
func fences(src []rune) (token Token, err error) {
match, err := block["fences"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
var text string
if match.GroupCount() > 3 {
text = match.GroupByNumber(3).String()
}
text = indentCodeCompensation(raw, text)
return Token{
Type: "code",
Raw: raw,
Text: text,
Tokens: []Token{},
}, nil
}
func heading(src []rune) (token Token, err error) {
match, err := block["heading"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
text := match.GroupByNumber(2).String()
return Token{
Type: "heading",
Raw: raw,
Depth: len(match.GroupByNumber(1).Runes()),
Text: text,
Tokens: []Token{},
}, nil
}
func nptable(src []rune) (token Token, err error) {
matched, err := block["nptable"].Exec(src)
if err != nil || matched == nil {
return token, err
}
first := matched.GroupByNumber(1).Runes()
header := str(first).replace(MustCompile(`^ *| *\| *$`, Global), "").string()
second := matched.GroupByNumber(2).Runes()
align := str(second).replace(MustCompile(`^ *|\| *$`, Global), "").string()
third := matched.GroupByNumber(3).Runes()
var celles = make([]string, 0)
if len(third) > 0 {
temp := str(third).replace(MustCompile(`\n$`, RE2), "").string()
celles = strings.Split(temp, "\n")
}
item := Token{
Type: "table",
Header: splitCells(header, 0),
Align: regexp.MustCompile(` *\| *`).Split(align, -1),
Cells: make([][]string, len(celles)),
Raw: matched.GroupByNumber(0).String(),
}
if len(item.Header) == len(item.Align) {
n := len(item.Align)
for i := 0; i < n; i++ {
if MustCompile(`^ *-+: *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "right"
} else if MustCompile(`^ *:-+: *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "center"
} else if MustCompile(`^ *:-+ *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "left"
} else {
item.Align[i] = ""
}
}
n = len(item.Cells)
for i := 0; i < n; i++ {
cell := celles[i]
item.Cells[i] = splitCells(cell, len(item.Header))
}
return item, nil
}
return token, nil
}
func hr(src []rune) (token Token, err error) {
match, err := block["hr"].Exec(src)
if err != nil || match == nil {
return token, err
}
return Token{
Type: "hr",
Raw: match.GroupByNumber(0).String(),
Tokens: []Token{},
}, nil
}
func blockquote(src []rune) (token Token, err error) {
match, err := block["blockquote"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
text := MustCompile(`^ *> ?`, Multiline|Global).ReplaceStr(raw, "", 0, -1)
return Token{
Type: "blockquote",
Raw: raw,
Text: text,
Tokens: []Token{},
}, nil
}
func list(src []rune) (token Token, err error) {
match, err := block["list"].Exec(src)
if err != nil || match == nil {
return token, err
}
var raw = match.GroupByNumber(0).Runes()
var bull = match.GroupByNumber(2).Runes()
isordered := len(bull) > 1
isparen := bull[len(bull)-1] == ')'
var start string
if isordered {
start = string(bull[0 : len(bull)-1])
}
list := Token{
Type: "list",
Raw: string(raw),
Ordered: isordered,
Start: string(start),
Loose: false,
Tokens: []Token{},
Items: []Token{},
}
itemmatch, err := str(raw).match(block["item"])
if err != nil {
return token, err
}
var next bool
length := len(itemmatch)
replace := MustCompile(`^ *([*+-]|\d+[.)]) *`, RE2)
reloose := MustCompile(`\n\n(?!\s*$)`, RE2)
retask := MustCompile(`^\[[ xX]\] `, RE2)
for i := 0; i < length; i++ {
item := itemmatch[i].Runes()
raw := item
space := len(item)
item = replace.ReplaceRune(item, "", 0, 1)
index := str(item).indexOf("\n ")
if index != -1 {
space -= len(item)
item = MustCompile(`'^ {1,`+string(space)+`}`, Multiline|Global).
ReplaceRune(item, "", 0, -1)
}
if i != length-1 {
t, _ := block["bullet"].Exec(itemmatch[i+1].Runes())
b := t.GroupByNumber(0).Runes()
var condiotion bool
if isordered {
condiotion = len(b) == 1 || (!isparen && b[len(b)-1] == ')')
} else {
condiotion = len(b) > 1
}
// todo: do nothing
if condiotion {
strs := make([]string, 0)
for k := i + 1; k < length; k++ {
strs = append(strs, itemmatch[k].String())
}
addBack := []rune(strings.Join(strs, "\n"))
rawrune := []rune(list.Raw)
list.Raw = string(rawrune[0 : len(rawrune)-len(addBack)])
i = length - 1
}
}
loose := next || reloose.Test(item)
if i != length-1 {
next = item[len(item)-1] == '\n'
if !loose {
loose = next
}
}
if loose {
list.Loose = true
}
ischecked := "undefined"
istask := retask.Test(item)
if istask {
ischecked = fmt.Sprintf("%v", item[1] != ' ')
item = MustCompile(`^\[[ xX]\] +`, RE2).ReplaceRune(item, "", 0, -1)
}
token := Token{
Type: "list_item",
Raw: string(raw),
Text: string(item),
Task: istask,
Loose: loose,
Tokens: []Token{},
}
if ischecked != "undefined" {
token.Checked = "null"
} else {
token.Checked = fmt.Sprintf("%v", ischecked)
}
list.Items = append(list.Items, token)
}
return list, nil
}
func def(src []rune) (token Token, err error) {
match, err := block["def"].Exec(src)
if err != nil || match == nil {
return token, err
}
third := match.GroupByNumber(3).Runes()
if string(third) != "" {
third = str(third).slice(1, len(third)-1)
}
first := match.GroupByNumber(1).String()
tag := MustCompile(`\s+`, Global).ReplaceRune([]rune(strings.ToLower(first)), " ", 0, -1)
return Token{
Tag: string(tag),
Raw: match.GroupByNumber(0).String(),
Href: match.GroupByNumber(2).String(),
Title: string(third),
Tokens: []Token{},
}, nil
}
func table(src []rune) (token Token, err error) {
matched, err := block["table"].Exec(src)
if err != nil || matched == nil {
return token, err
}
first := matched.GroupByNumber(1).Runes()
header := str(first).replace(MustCompile(`^ *| *\| *$`, Global), "").string()
second := matched.GroupByNumber(2).Runes()
align := str(second).replace(MustCompile(`^ *|\| *$`, Global), "").string()
third := matched.GroupByNumber(3).Runes()
var celles = make([]string, 0)
if len(third) > 0 {
temp := str(third).replace(MustCompile(`\n$`, RE2), "").string()
celles = strings.Split(temp, "\n")
}
item := Token{
Type: "table",
Header: splitCells(header, 0),
Align: regexp.MustCompile(` *\| *`).Split(align, -1),
Cells: make([][]string, len(celles)),
}
if len(item.Header) == len(item.Align) {
item.Raw = matched.GroupByNumber(0).String()
n := len(item.Align)
for i := 0; i < n; i++ {
if MustCompile(`^ *-+: *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "right"
} else if MustCompile(`^ *:-+: *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "center"
} else if MustCompile(`^ *:-+ *$`, RE2).Test([]rune(item.Align[i])) {
item.Align[i] = "left"
} else {
item.Align[i] = ""
}
}
n = len(item.Cells)
for i := 0; i < n; i++ {
cell := celles[i]
cell = str(cell).replace(MustCompile(`^ *\| *| *\| *$`, Global), "").string()
item.Cells[i] = splitCells(cell, len(item.Header))
}
return item, nil
}
return token, nil
}
func lheading(src []rune) (token Token, err error) {
match, err := block["lheading"].Exec(src)
if err != nil || match == nil {
return token, err
}
var depth = 2
if match.GroupByNumber(2).Runes()[0] == '=' {
depth = 1
}
return Token{
Type: "heading",
Raw: match.GroupByNumber(0).String(),
Text: match.GroupByNumber(1).String(),
Depth: depth,
Tokens: []Token{},
}, nil
}
func paragraph(src []rune) (token Token, err error) {
match, err := block["paragraph"].Exec(src)
if err != nil || match == nil {
return token, err
}
text := match.GroupByNumber(1).Runes()
if text[len(text)-1] == '\n' {
text = text[0 : len(text)-1]
}
return Token{
Type: "paragraph",
Raw: match.GroupByNumber(0).String(),
Text: string(text),
Tokens: []Token{},
}, nil
}
func text(src []rune, tokens *[]Token) (token Token, err error) {
match, err := block["text"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
n := len(*tokens)
if n > 0 && (*tokens)[n-1].Type == "text" {
return Token{
Raw: raw,
Text: raw,
Tokens: []Token{},
}, nil
}
return Token{
Type: "text",
Raw: raw,
Text: raw,
Tokens: []Token{},
}, nil
}
func escape(src []rune) (token Token, err error) {
match, err := inline["escape"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
text := match.GroupByNumber(1).String()
return Token{
Type: "escape",
Raw: raw,
Text: text,
Tokens: []Token{},
}, nil
}
func link(src []rune) (token Token, err error) {
match, err := inline["link"].Exec(src)
if err != nil || match == nil {
return token, err
}
zero := match.GroupByNumber(0).Runes()
first := match.GroupByNumber(1).Runes()
second := match.GroupByNumber(2).Runes()
third := match.GroupByNumber(3).Runes()
lastParentIndex := findClosingBracket(second, []rune("()"))
if lastParentIndex > -1 {
start := 4
if str(zero).indexOf("!") == 0 {
start = 5
}
linkLen := start + len(first) + lastParentIndex
second = second[:lastParentIndex]
zero = []rune(strings.TrimSpace(string(zero[:linkLen])))
third = []rune("")
}
href := strings.TrimSpace(string(second))
title := ""
if len(third) > 0 {
title = string(str(third).slice(1, -1))
}
href = MustCompile(`^<([\s\S]*)>$`, RE2).ReplaceStr(href, "$1", 0, 1)
if href != "" {
href = inline["_escapes"].ReplaceStr(href, "$1", 0, -1)
}
if title != "" {
title = inline["_escapes"].ReplaceStr(title, "$1", 0, -1)
}
link := Link{
Href: href,
Title: title,
}
return outputLink(match, link, string(zero)), nil
}
func reflink(src []rune, links map[string]Link) (token Token, err error) {
match, err := inline["reflink"].Exec(src)
if err != nil {
return token, err
}
if match == nil {
match, err = inline["nolink"].Exec(src)
}
if err != nil || match == nil {
return token, err
}
zero := match.GroupByNumber(0).Runes()
first := match.GroupByNumber(1).Runes()
var link string
if match.GroupCount() == 3 && match.GroupByNumber(2).Length > 0 {
link = match.GroupByNumber(2).String()
} else {
link = string(first)
}
link = MustCompile(`\s+`, Global).ReplaceStr(link, " ", 0, -1)
link = strings.ToLower(link)
ltoken, ok := links[link]
if !ok || ltoken.Href == "" {
text := string(zero[0])
return Token{
Type: "text",
Raw: text,
Text: text,
Tokens: []Token{},
}, nil
}
return outputLink(match, ltoken, string(zero)), nil
}
func strong(src []rune, markedSrc []rune, preChar string) (token Token, err error) {
match, err := inline["strong_start"].Exec(src)
if err != nil || match == nil {
return token, err
}
punctaute, _ := inline["punctuation"].Exec([]rune(preChar))
first := match.GroupByNumber(1).Runes()
if len(first) == 0 || (len(first) > 0 && (preChar == "" || punctaute != nil)) {
markedSrc = str(markedSrc).slice(-1 * len(src))
zero := match.GroupByNumber(0).String()
var endReg *Regex
if zero == "**" {
endReg = inline["strong_endAst"] // endAst
} else {
endReg = inline["strong_endUnd"] // endUnd
}
endReg.LastIndex = 0
match, err = endReg.Exec(markedSrc)
for match != nil {
text := str(markedSrc).slice(0, match.Index+3)
strongMatch, _ := inline["strong_middle"].Exec(text)
if strongMatch != nil {
zero := strongMatch.GroupByNumber(0).Runes()
return Token{
Type: "strong",
Raw: str(src).slice(0, len(zero)).string(),
Text: str(src).slice(2, len(zero)-2).string(),
Tokens: []Token{},
}, nil
}
match, err = endReg.Exec(markedSrc)
}
}
return token, nil
}
func em(src []rune, markedSrc []rune, preChar string) (token Token, err error) {
match, err := inline["em_start"].Exec(src)
if err != nil || match == nil {
return token, err
}
punctaute, _ := inline["punctuation"].Exec([]rune(preChar))
first := match.GroupByNumber(1).Runes()
if len(first) == 0 || (len(first) > 0 && (preChar == "" || punctaute != nil)) {
markedSrc = str(markedSrc).slice(-1 * len(src))
zero := match.GroupByNumber(0).String()
var endReg *Regex
if zero == "*" {
endReg = inline["em_endAst"] // endAst
} else {
endReg = inline["em_endUnd"] // endUnd
}
endReg.LastIndex = 0
match, err = endReg.Exec(markedSrc)
for match != nil {
text := markedSrc[0 : match.Index+2]
strongMatch, _ := inline["em_middle"].Exec(text)
if strongMatch != nil {
zero := strongMatch.GroupByNumber(0).Runes()
return Token{
Type: "em",
Raw: str(src).slice(0, len(zero)).string(),
Text: str(src).slice(1, len(zero)-1).string(),
Tokens: []Token{},
}, nil
}
match, err = endReg.Exec(markedSrc)
}
}
return token, nil
}
func codespan(src []rune) (token Token, err error) {
match, err := inline["code"].Exec(src)
if err != nil || match == nil {
return token, err
}
raw := match.GroupByNumber(0).String()
text := match.GroupByNumber(2).String()
re := MustCompile(`\n`, RE2)
text, _ = re.Replace(text, " ", 0, -1)
reHasNonSpaceChars := MustCompile(`[^ ]`, RE2)
hasNonSpaceChars, _ := reHasNonSpaceChars.MatchString(text)
hasSpaceCharsOnBothEnds := strings.HasPrefix(text, " ") && strings.HasSuffix(text, " ")
if hasNonSpaceChars && hasSpaceCharsOnBothEnds {
text = text[1 : len(text)-1]
}
return Token{
Type: "codespan",
Raw: raw,
Text: text,
Tokens: []Token{},
}, nil
}