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mirror of https://github.com/danog/blackfriday.git synced 2024-11-26 20:14:43 +01:00

fixing link parsing

This commit is contained in:
Russ Ross 2011-05-27 13:38:10 -06:00
parent 48923aa47f
commit f16de74d8b

View File

@ -364,7 +364,7 @@ func char_emphasis(ob *bytes.Buffer, rndr *render, data []byte, offset int) int
if len(data) > 2 && data[1] != c {
// whitespace cannot follow an opening emphasis;
// strikethrough only takes two characters '~~'
if c == '~' || unicode.IsSpace(int(data[1])) {
if c == '~' || isspace(data[1]) {
return 0
}
if ret = parse_emph1(ob, rndr, data[1:], c); ret == 0 {
@ -375,7 +375,7 @@ func char_emphasis(ob *bytes.Buffer, rndr *render, data []byte, offset int) int
}
if len(data) > 3 && data[1] == c && data[2] != c {
if unicode.IsSpace(int(data[2])) {
if isspace(data[2]) {
return 0
}
if ret = parse_emph2(ob, rndr, data[2:], c); ret == 0 {
@ -386,7 +386,7 @@ func char_emphasis(ob *bytes.Buffer, rndr *render, data []byte, offset int) int
}
if len(data) > 4 && data[1] == c && data[2] == c && data[3] != c {
if c == '~' || unicode.IsSpace(int(data[3])) {
if c == '~' || isspace(data[3]) {
return 0
}
if ret = parse_emph3(ob, rndr, data, 3, c); ret == 0 {
@ -507,6 +507,9 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
case data[i] == ']':
level--
if level <= 0 {
i-- // compensate for extra i++ in for loop
}
}
}
@ -518,8 +521,8 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
i++
// skip any amount of whitespace or newline
// (this is much more laxist than original markdown syntax)
for i < len(data) && unicode.IsSpace(int(data[i])) {
// (this is much more lax than original markdown syntax)
for i < len(data) && isspace(data[i]) {
i++
}
@ -529,7 +532,7 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
// skipping initial whitespace
i++
for i < len(data) && unicode.IsSpace(int(data[i])) {
for i < len(data) && isspace(data[i]) {
i++
}
@ -575,7 +578,7 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
// skipping whitespaces after title
title_e = i - 1
for title_e > title_b && unicode.IsSpace(int(data[title_e])) {
for title_e > title_b && isspace(data[title_e]) {
title_e--
}
@ -587,7 +590,7 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
}
// remove whitespace at the end of the link
for link_e > link_b && unicode.IsSpace(int(data[link_e-1])) {
for link_e > link_b && isspace(data[link_e-1]) {
link_e--
}
@ -648,7 +651,9 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
}
// find the link_ref with matching id
index := sort.Search(len(rndr.refs), func(i int) bool { return !byteslice_less(rndr.refs[i].id, id) })
index := sort.Search(len(rndr.refs), func(i int) bool {
return !byteslice_less(rndr.refs[i].id, id)
})
if index >= len(rndr.refs) || !bytes.Equal(rndr.refs[index].id, id) {
return 0
}
@ -682,7 +687,9 @@ func char_link(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
}
// find the link_ref with matching id
index := sort.Search(len(rndr.refs), func(i int) bool { return !byteslice_less(rndr.refs[i].id, id) })
index := sort.Search(len(rndr.refs), func(i int) bool {
return !byteslice_less(rndr.refs[i].id, id)
})
if index >= len(rndr.refs) || !bytes.Equal(rndr.refs[index].id, id) {
return 0
}
@ -789,7 +796,7 @@ func char_entity(ob *bytes.Buffer, rndr *render, data []byte, offset int) int {
end++
}
for end < len(data) && (unicode.IsDigit(int(data[end])) || unicode.IsLetter(int(data[end]))) {
for end < len(data) && isalnum(data[end]) {
end++
}
@ -813,7 +820,7 @@ func char_autolink(ob *bytes.Buffer, rndr *render, data []byte, offset int) int
data = data[offset:]
if offset > 0 {
if !unicode.IsSpace(int(orig_data[offset-1])) && !ispunct(int(orig_data[offset-1])) {
if !isspace(orig_data[offset-1]) && !ispunct(orig_data[offset-1]) {
return 0
}
}
@ -823,7 +830,7 @@ func char_autolink(ob *bytes.Buffer, rndr *render, data []byte, offset int) int
}
link_end := 0
for link_end < len(data) && !unicode.IsSpace(int(data[link_end])) {
for link_end < len(data) && !isspace(data[link_end]) {
link_end++
}
@ -905,7 +912,7 @@ var valid_uris = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"
func is_safe_link(link []byte) bool {
for _, prefix := range valid_uris {
if len(link) > len(prefix) && !byteslice_less(link[:len(prefix)], prefix) && !byteslice_less(prefix, link[:len(prefix)]) && (unicode.IsLetter(int(link[len(prefix)])) || unicode.IsDigit(int(link[len(prefix)]))) {
if len(link) > len(prefix) && !byteslice_less(link[:len(prefix)], prefix) && !byteslice_less(prefix, link[:len(prefix)]) && isalnum(link[len(prefix)]) {
return true
}
}
@ -915,8 +922,8 @@ func is_safe_link(link []byte) bool {
// taken from regexp in the stdlib
func ispunct(c int) bool {
for _, r := range "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" {
func ispunct(c byte) bool {
for _, r := range []byte("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~") {
if c == r {
return true
}
@ -924,6 +931,14 @@ func ispunct(c int) bool {
return false
}
func isspace(c byte) bool {
return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == '\v'
}
func isalnum(c byte) bool {
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
}
// return the length of the given tag, or 0 is it's not valid
func tag_length(data []byte, autolink *int) int {
var i, j int
@ -943,7 +958,7 @@ func tag_length(data []byte, autolink *int) int {
i = 1
}
if !unicode.IsDigit(int(data[i])) && !unicode.IsLetter(int(data[i])) {
if !isalnum(data[i]) {
return 0
}
@ -951,7 +966,7 @@ func tag_length(data []byte, autolink *int) int {
*autolink = MKDA_NOT_AUTOLINK
// try to find the beggining of an URI
for i < len(data) && ((unicode.IsLetter(int(data[i])) || unicode.IsDigit(int(data[i]))) || data[i] == '.' || data[i] == '+' || data[i] == '-') {
for i < len(data) && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-') {
i++
}
@ -978,7 +993,7 @@ func tag_length(data []byte, autolink *int) int {
if data[i] == '\\' {
i += 2
} else {
if data[i] == '>' || data[i] == '\'' || data[i] == '"' || unicode.IsSpace(int(data[i])) {
if data[i] == '>' || data[i] == '\'' || data[i] == '"' || isspace(data[i]) {
break
} else {
i++
@ -1015,7 +1030,7 @@ func is_mail_autolink(data []byte) int {
// address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@'
for i := 0; i < len(data); i++ {
if unicode.IsLetter(int(data[i])) || unicode.IsDigit(int(data[i])) {
if isalnum(data[i]) {
continue
}
@ -1145,10 +1160,10 @@ func parse_emph1(ob *bytes.Buffer, rndr *render, data []byte, c byte) int {
continue
}
if data[i] == c && !unicode.IsSpace(int(data[i-1])) {
if data[i] == c && !isspace(data[i-1]) {
if rndr.ext_flags&MKDEXT_NO_INTRA_EMPHASIS != 0 {
if !(i+1 == len(data) || unicode.IsSpace(int(data[i+1])) || ispunct(int(data[i+1]))) {
if !(i+1 == len(data) || isspace(data[i+1]) || ispunct(data[i+1])) {
continue
}
}
@ -1186,7 +1201,7 @@ func parse_emph2(ob *bytes.Buffer, rndr *render, data []byte, c byte) int {
}
i += length
if i+1 < len(data) && data[i] == c && data[i+1] == c && i > 0 && !unicode.IsSpace(int(data[i-1])) {
if i+1 < len(data) && data[i] == c && data[i+1] == c && i > 0 && !isspace(data[i-1]) {
work := bytes.NewBuffer(nil)
parse_inline(work, rndr, data[:i])
r := render_method(ob, work.Bytes(), rndr.mk.opaque)
@ -1214,7 +1229,7 @@ func parse_emph3(ob *bytes.Buffer, rndr *render, data []byte, offset int, c byte
i += length
// skip whitespace preceded symbols
if data[i] != c || unicode.IsSpace(int(data[i-1])) {
if data[i] != c || isspace(data[i-1]) {
continue
}
@ -1649,18 +1664,18 @@ func is_codefence(data []byte, syntax **string) int {
// string all whitespace at the beginning and the end
// of the {} block
for syn > 0 && unicode.IsSpace(int(data[syntax_start])) {
for syn > 0 && isspace(data[syntax_start]) {
syntax_start++
syn--
}
for syn > 0 && unicode.IsSpace(int(data[syntax_start+syn-1])) {
for syn > 0 && isspace(data[syntax_start+syn-1]) {
syn--
}
i++
} else {
for i < len(data) && !unicode.IsSpace(int(data[i])) {
for i < len(data) && !isspace(data[i]) {
syn++
i++
}
@ -1671,7 +1686,7 @@ func is_codefence(data []byte, syntax **string) int {
}
for i < len(data) && data[i] != '\n' {
if !unicode.IsSpace(int(data[i])) {
if !isspace(data[i]) {
return 0
}
i++
@ -1853,7 +1868,7 @@ func parse_table_row(ob *bytes.Buffer, rndr *render, data []byte, columns int, c
}
for col = 0; col < columns && i < len(data); col++ {
for i < len(data) && unicode.IsSpace(int(data[i])) {
for i < len(data) && isspace(data[i]) {
i++
}
@ -1865,7 +1880,7 @@ func parse_table_row(ob *bytes.Buffer, rndr *render, data []byte, columns int, c
cell_end := i - 1
for cell_end > cell_start && unicode.IsSpace(int(data[cell_end])) {
for cell_end > cell_start && isspace(data[cell_end]) {
cell_end--
}
@ -2371,13 +2386,13 @@ func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface
ob.WriteString("<pre><code class=\"")
for i, cls := 0, 0; i < len(lang); i, cls = i+1, cls+1 {
for i < len(lang) && unicode.IsSpace(int(lang[i])) {
for i < len(lang) && isspace(lang[i]) {
i++
}
if i < len(lang) {
org := i
for i < len(lang) && !unicode.IsSpace(int(lang[i])) {
for i < len(lang) && !isspace(lang[i]) {
i++
}
@ -2488,7 +2503,7 @@ func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
return
}
for i < len(text) && unicode.IsSpace(int(text[i])) {
for i < len(text) && isspace(text[i]) {
i++
}
@ -2522,7 +2537,36 @@ func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
ob.WriteString("</p>\n")
}
func rndr_autolink(ob *bytes.Buffer, text []byte, kind int, opaque interface{}) int {
func rndr_autolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{}) int {
options := opaque.(*html_renderopts)
if len(link) == 0 {
return 0
}
if options.flags&HTML_SAFELINK != 0 && !is_safe_link(link) && kind != MKDA_EMAIL {
return 0
}
ob.WriteString("<a href=\"")
if kind == MKDA_EMAIL {
ob.WriteString("mailto:")
}
ob.Write(link)
ob.WriteString("\">")
/*
* Pretty printing: if we get an email address as
* an actual URI, e.g. `mailto:foo@bar.com`, we don't
* want to print the `mailto:` prefix
*/
if bytes.HasPrefix(link, []byte("mailto:")) {
attr_escape(ob, link[7:])
} else {
attr_escape(ob, link)
}
ob.WriteString("</a>")
return 1
}
@ -2554,6 +2598,23 @@ func rndr_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
}
func rndr_image(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque interface{}) int {
options := opaque.(*html_renderopts)
if len(link) == 0 {
return 0
}
ob.WriteString("<img src=\"")
attr_escape(ob, link)
ob.WriteString("\" alt=\"")
if len(alt) > 0 {
attr_escape(ob, alt)
}
if len(title) > 0 {
ob.WriteString("\" title=\"")
attr_escape(ob, title)
}
ob.WriteByte('"')
ob.WriteString(options.close_tag)
return 1
}
@ -2565,6 +2626,25 @@ func rndr_linebreak(ob *bytes.Buffer, opaque interface{}) int {
}
func rndr_link(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaque interface{}) int {
options := opaque.(*html_renderopts)
if options.flags&HTML_SAFELINK != 0 && !is_safe_link(link) {
return 0
}
ob.WriteString("<a href=\"")
if len(link) > 0 {
ob.Write(link)
}
if len(title) > 0 {
ob.WriteString("\" title=\"")
attr_escape(ob, title)
}
ob.WriteString("\">")
if len(content) > 0 {
ob.Write(content)
}
ob.WriteString("</a>")
return 1
}
@ -2616,7 +2696,7 @@ func is_html_tag(tag []byte, tagname string) bool {
return false
}
i++
for i < len(tag) && unicode.IsSpace(int(tag[i])) {
for i < len(tag) && isspace(tag[i]) {
i++
}
@ -2624,7 +2704,7 @@ func is_html_tag(tag []byte, tagname string) bool {
i++
}
for i < len(tag) && unicode.IsSpace(int(tag[i])) {
for i < len(tag) && isspace(tag[i]) {
i++
}
@ -2643,7 +2723,7 @@ func is_html_tag(tag []byte, tagname string) bool {
return false
}
return unicode.IsSpace(int(tag[i])) || tag[i] == '>'
return isspace(tag[i]) || tag[i] == '>'
}
@ -2656,68 +2736,72 @@ func is_html_tag(tag []byte, tagname string) bool {
func main() {
ob := bytes.NewBuffer(nil)
input := ""
input += "##Header##\n"
input += "\n"
input += "----------\n"
input += "\n"
input += "Underlined header\n"
input += "-----------------\n"
input += "\n"
input += "<p>Some block html\n"
input += "</p>\n"
input += "\n"
input += "Score | Grade\n"
input += "------|------\n"
input += "94 | A\n"
input += "85 | B\n"
input += "74 | C\n"
input += "65 | D\n"
input += "\n"
input += "``` go\n"
input += "func fib(n int) int {\n"
input += " if n <= 1 {\n"
input += " return n\n"
input += " }\n"
input += " return n * fib(n-1)\n"
input += "}\n"
input += "```\n"
input += "\n"
input += "> A blockquote\n"
input += "> or something like that\n"
input += "> With a table | of two columns\n"
input += "> -------------|---------------\n"
input += "> key | value \n"
input += "\n"
input += "\n"
// input += "##Header##\n"
// input += "\n"
// input += "----------\n"
// input += "\n"
// input += "Underlined header\n"
// input += "-----------------\n"
// input += "\n"
// input += "<p>Some block html\n"
// input += "</p>\n"
// input += "\n"
// input += "Score | Grade\n"
// input += "------|------\n"
// input += "94 | A\n"
// input += "85 | B\n"
// input += "74 | C\n"
// input += "65 | D\n"
// input += "\n"
// input += "``` go\n"
// input += "func fib(n int) int {\n"
// input += " if n <= 1 {\n"
// input += " return n\n"
// input += " }\n"
// input += " return n * fib(n-1)\n"
// input += "}\n"
// input += "```\n"
// input += "\n"
// input += "> A blockquote\n"
// input += "> or something like that\n"
// input += "> With a table | of two columns\n"
// input += "> -------------|---------------\n"
// input += "> key | value \n"
// input += "\n"
// input += "\n"
input += "Some **bold** Some *italic* and [a link][1] \n"
input += "\n"
input += "A little code sample\n"
input += "\n"
input += " </head>\n"
input += " <title>Web Page Title</title>\n"
input += " </head>\n"
input += "\n"
input += "A picture\n"
input += "\n"
input += "![alt text][2]\n"
input += "\n"
input += "A list\n"
input += "\n"
input += "- apples\n"
input += "- oranges\n"
input += "- eggs\n"
input += "\n"
input += "A numbered list\n"
input += "\n"
input += "1. a\n"
input += "2. b\n"
input += "3. c\n"
input += "\n"
input += "A little quote\n"
input += "\n"
input += "> It is now time for all good men to come to the aid of their country. \n"
input += "\n"
input += "A final paragraph. `code this` fool\n"
// input += "\n"
// input += "A little code sample\n"
// input += "\n"
// input += " </head>\n"
// input += " <title>Web Page Title</title>\n"
// input += " </head>\n"
// input += "\n"
// input += "A picture\n"
// input += "\n"
// input += "![alt text][2]\n"
// input += "\n"
// input += "A list\n"
// input += "\n"
// input += "- apples\n"
// input += "- oranges\n"
// input += "- eggs\n"
// input += "\n"
// input += "A numbered list\n"
// input += "\n"
// input += "1. a\n"
// input += "2. b\n"
// input += "3. c\n"
// input += "\n"
// input += "A little quote\n"
// input += "\n"
// input += "> It is now time for all good men to come to the aid of their country. \n"
// input += "\n"
// input += "A final paragraph. `code this` fool\n"
// input += "\n"
// input += "Click [here](http:google.com)\n"
// input += "\n"
// input += "\n"
input += "\n"
input += " [1]: http://www.google.com\n"
input += " [2]: http://www.google.com/intl/en_ALL/images/logo.gif\n"
@ -2749,9 +2833,9 @@ func main() {
rndrer.normal_text = rndr_normal_text
rndrer.opaque = &html_renderopts{close_tag: " />"}
rndrer.opaque = &html_renderopts{close_tag: ">\n"}
var extensions uint32 = MKDEXT_FENCED_CODE | MKDEXT_TABLES
var extensions uint32 = MKDEXT_NO_INTRA_EMPHASIS | MKDEXT_TABLES | MKDEXT_FENCED_CODE | MKDEXT_AUTOLINK | MKDEXT_STRIKETHROUGH | MKDEXT_LAX_HTML_BLOCKS | MKDEXT_SPACE_HEADERS
// call the main rendered function
Markdown(ob, ib, rndrer, extensions)