diff options
Diffstat (limited to 'vendor/github.com/russross/blackfriday/smartypants.go')
| -rw-r--r-- | vendor/github.com/russross/blackfriday/smartypants.go | 430 |
1 files changed, 0 insertions, 430 deletions
diff --git a/vendor/github.com/russross/blackfriday/smartypants.go b/vendor/github.com/russross/blackfriday/smartypants.go deleted file mode 100644 index f25bd07d..00000000 --- a/vendor/github.com/russross/blackfriday/smartypants.go +++ /dev/null @@ -1,430 +0,0 @@ -// -// Blackfriday Markdown Processor -// Available at http://github.com/russross/blackfriday -// -// Copyright © 2011 Russ Ross <russ@russross.com>. -// Distributed under the Simplified BSD License. -// See README.md for details. -// - -// -// -// SmartyPants rendering -// -// - -package blackfriday - -import ( - "bytes" -) - -type smartypantsData struct { - inSingleQuote bool - inDoubleQuote bool -} - -func wordBoundary(c byte) bool { - return c == 0 || isspace(c) || ispunct(c) -} - -func tolower(c byte) byte { - if c >= 'A' && c <= 'Z' { - return c - 'A' + 'a' - } - return c -} - -func isdigit(c byte) bool { - return c >= '0' && c <= '9' -} - -func smartQuoteHelper(out *bytes.Buffer, previousChar byte, nextChar byte, quote byte, isOpen *bool, addNBSP bool) bool { - // edge of the buffer is likely to be a tag that we don't get to see, - // so we treat it like text sometimes - - // enumerate all sixteen possibilities for (previousChar, nextChar) - // each can be one of {0, space, punct, other} - switch { - case previousChar == 0 && nextChar == 0: - // context is not any help here, so toggle - *isOpen = !*isOpen - case isspace(previousChar) && nextChar == 0: - // [ "] might be [ "<code>foo...] - *isOpen = true - case ispunct(previousChar) && nextChar == 0: - // [!"] hmm... could be [Run!"] or [("<code>...] - *isOpen = false - case /* isnormal(previousChar) && */ nextChar == 0: - // [a"] is probably a close - *isOpen = false - case previousChar == 0 && isspace(nextChar): - // [" ] might be [...foo</code>" ] - *isOpen = false - case isspace(previousChar) && isspace(nextChar): - // [ " ] context is not any help here, so toggle - *isOpen = !*isOpen - case ispunct(previousChar) && isspace(nextChar): - // [!" ] is probably a close - *isOpen = false - case /* isnormal(previousChar) && */ isspace(nextChar): - // [a" ] this is one of the easy cases - *isOpen = false - case previousChar == 0 && ispunct(nextChar): - // ["!] hmm... could be ["$1.95] or [</code>"!...] - *isOpen = false - case isspace(previousChar) && ispunct(nextChar): - // [ "!] looks more like [ "$1.95] - *isOpen = true - case ispunct(previousChar) && ispunct(nextChar): - // [!"!] context is not any help here, so toggle - *isOpen = !*isOpen - case /* isnormal(previousChar) && */ ispunct(nextChar): - // [a"!] is probably a close - *isOpen = false - case previousChar == 0 /* && isnormal(nextChar) */ : - // ["a] is probably an open - *isOpen = true - case isspace(previousChar) /* && isnormal(nextChar) */ : - // [ "a] this is one of the easy cases - *isOpen = true - case ispunct(previousChar) /* && isnormal(nextChar) */ : - // [!"a] is probably an open - *isOpen = true - default: - // [a'b] maybe a contraction? - *isOpen = false - } - - // Note that with the limited lookahead, this non-breaking - // space will also be appended to single double quotes. - if addNBSP && !*isOpen { - out.WriteString(" ") - } - - out.WriteByte('&') - if *isOpen { - out.WriteByte('l') - } else { - out.WriteByte('r') - } - out.WriteByte(quote) - out.WriteString("quo;") - - if addNBSP && *isOpen { - out.WriteString(" ") - } - - return true -} - -func smartSingleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 2 { - t1 := tolower(text[1]) - - if t1 == '\'' { - nextChar := byte(0) - if len(text) >= 3 { - nextChar = text[2] - } - if smartQuoteHelper(out, previousChar, nextChar, 'd', &smrt.inDoubleQuote, false) { - return 1 - } - } - - if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || wordBoundary(text[2])) { - out.WriteString("’") - return 0 - } - - if len(text) >= 3 { - t2 := tolower(text[2]) - - if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) && - (len(text) < 4 || wordBoundary(text[3])) { - out.WriteString("’") - return 0 - } - } - } - - nextChar := byte(0) - if len(text) > 1 { - nextChar = text[1] - } - if smartQuoteHelper(out, previousChar, nextChar, 's', &smrt.inSingleQuote, false) { - return 0 - } - - out.WriteByte(text[0]) - return 0 -} - -func smartParens(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 3 { - t1 := tolower(text[1]) - t2 := tolower(text[2]) - - if t1 == 'c' && t2 == ')' { - out.WriteString("©") - return 2 - } - - if t1 == 'r' && t2 == ')' { - out.WriteString("®") - return 2 - } - - if len(text) >= 4 && t1 == 't' && t2 == 'm' && text[3] == ')' { - out.WriteString("™") - return 3 - } - } - - out.WriteByte(text[0]) - return 0 -} - -func smartDash(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 2 { - if text[1] == '-' { - out.WriteString("—") - return 1 - } - - if wordBoundary(previousChar) && wordBoundary(text[1]) { - out.WriteString("–") - return 0 - } - } - - out.WriteByte(text[0]) - return 0 -} - -func smartDashLatex(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 3 && text[1] == '-' && text[2] == '-' { - out.WriteString("—") - return 2 - } - if len(text) >= 2 && text[1] == '-' { - out.WriteString("–") - return 1 - } - - out.WriteByte(text[0]) - return 0 -} - -func smartAmpVariant(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte, quote byte, addNBSP bool) int { - if bytes.HasPrefix(text, []byte(""")) { - nextChar := byte(0) - if len(text) >= 7 { - nextChar = text[6] - } - if smartQuoteHelper(out, previousChar, nextChar, quote, &smrt.inDoubleQuote, addNBSP) { - return 5 - } - } - - if bytes.HasPrefix(text, []byte("�")) { - return 3 - } - - out.WriteByte('&') - return 0 -} - -func smartAmp(angledQuotes, addNBSP bool) func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - var quote byte = 'd' - if angledQuotes { - quote = 'a' - } - - return func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - return smartAmpVariant(out, smrt, previousChar, text, quote, addNBSP) - } -} - -func smartPeriod(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 3 && text[1] == '.' && text[2] == '.' { - out.WriteString("…") - return 2 - } - - if len(text) >= 5 && text[1] == ' ' && text[2] == '.' && text[3] == ' ' && text[4] == '.' { - out.WriteString("…") - return 4 - } - - out.WriteByte(text[0]) - return 0 -} - -func smartBacktick(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if len(text) >= 2 && text[1] == '`' { - nextChar := byte(0) - if len(text) >= 3 { - nextChar = text[2] - } - if smartQuoteHelper(out, previousChar, nextChar, 'd', &smrt.inDoubleQuote, false) { - return 1 - } - } - - out.WriteByte(text[0]) - return 0 -} - -func smartNumberGeneric(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 { - // is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b - // note: check for regular slash (/) or fraction slash (⁄, 0x2044, or 0xe2 81 84 in utf-8) - // and avoid changing dates like 1/23/2005 into fractions. - numEnd := 0 - for len(text) > numEnd && isdigit(text[numEnd]) { - numEnd++ - } - if numEnd == 0 { - out.WriteByte(text[0]) - return 0 - } - denStart := numEnd + 1 - if len(text) > numEnd+3 && text[numEnd] == 0xe2 && text[numEnd+1] == 0x81 && text[numEnd+2] == 0x84 { - denStart = numEnd + 3 - } else if len(text) < numEnd+2 || text[numEnd] != '/' { - out.WriteByte(text[0]) - return 0 - } - denEnd := denStart - for len(text) > denEnd && isdigit(text[denEnd]) { - denEnd++ - } - if denEnd == denStart { - out.WriteByte(text[0]) - return 0 - } - if len(text) == denEnd || wordBoundary(text[denEnd]) && text[denEnd] != '/' { - out.WriteString("<sup>") - out.Write(text[:numEnd]) - out.WriteString("</sup>⁄<sub>") - out.Write(text[denStart:denEnd]) - out.WriteString("</sub>") - return denEnd - 1 - } - } - - out.WriteByte(text[0]) - return 0 -} - -func smartNumber(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 { - if text[0] == '1' && text[1] == '/' && text[2] == '2' { - if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' { - out.WriteString("½") - return 2 - } - } - - if text[0] == '1' && text[1] == '/' && text[2] == '4' { - if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') { - out.WriteString("¼") - return 2 - } - } - - if text[0] == '3' && text[1] == '/' && text[2] == '4' { - if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') { - out.WriteString("¾") - return 2 - } - } - } - - out.WriteByte(text[0]) - return 0 -} - -func smartDoubleQuoteVariant(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte, quote byte) int { - nextChar := byte(0) - if len(text) > 1 { - nextChar = text[1] - } - if !smartQuoteHelper(out, previousChar, nextChar, quote, &smrt.inDoubleQuote, false) { - out.WriteString(""") - } - - return 0 -} - -func smartDoubleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - return smartDoubleQuoteVariant(out, smrt, previousChar, text, 'd') -} - -func smartAngledDoubleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - return smartDoubleQuoteVariant(out, smrt, previousChar, text, 'a') -} - -func smartLeftAngle(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int { - i := 0 - - for i < len(text) && text[i] != '>' { - i++ - } - - out.Write(text[:i+1]) - return i -} - -type smartCallback func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int - -type smartypantsRenderer [256]smartCallback - -var ( - smartAmpAngled = smartAmp(true, false) - smartAmpAngledNBSP = smartAmp(true, true) - smartAmpRegular = smartAmp(false, false) - smartAmpRegularNBSP = smartAmp(false, true) -) - -func smartypants(flags int) *smartypantsRenderer { - r := new(smartypantsRenderer) - addNBSP := flags&HTML_SMARTYPANTS_QUOTES_NBSP != 0 - if flags&HTML_SMARTYPANTS_ANGLED_QUOTES == 0 { - r['"'] = smartDoubleQuote - if !addNBSP { - r['&'] = smartAmpRegular - } else { - r['&'] = smartAmpRegularNBSP - } - } else { - r['"'] = smartAngledDoubleQuote - if !addNBSP { - r['&'] = smartAmpAngled - } else { - r['&'] = smartAmpAngledNBSP - } - } - r['\''] = smartSingleQuote - r['('] = smartParens - if flags&HTML_SMARTYPANTS_DASHES != 0 { - if flags&HTML_SMARTYPANTS_LATEX_DASHES == 0 { - r['-'] = smartDash - } else { - r['-'] = smartDashLatex - } - } - r['.'] = smartPeriod - if flags&HTML_SMARTYPANTS_FRACTIONS == 0 { - r['1'] = smartNumber - r['3'] = smartNumber - } else { - for ch := '1'; ch <= '9'; ch++ { - r[ch] = smartNumberGeneric - } - } - r['<'] = smartLeftAngle - r['`'] = smartBacktick - return r -} |