forgejo/vendor/github.com/alecthomas/chroma/lexers/c/c.go
mrsdizzie af7ffaa279
Server-side syntax highlighting for all code (#12047)
* Server-side syntax hilighting for all code

This PR does a few things:

* Remove all traces of highlight.js
* Use chroma library to provide fast syntax hilighting directly on the server
* Provide syntax hilighting for diffs
* Re-style both unified and split diffs views
* Add custom syntax hilighting styling for both regular and arc-green

Fixes #7729
Fixes #10157
Fixes #11825
Fixes #7728
Fixes #3872
Fixes #3682

And perhaps gets closer to #9553

* fix line marker

* fix repo search

* Fix single line select

* properly load settings

* npm uninstall highlight.js

* review suggestion

* code review

* forgot to call function

* fix test

* Apply suggestions from code review

suggestions from @silverwind thanks

Co-authored-by: silverwind <me@silverwind.io>

* code review

* copy/paste error

* Use const for highlight size limit

* Update web_src/less/_repository.less

Co-authored-by: Lauris BH <lauris@nix.lv>

* update size limit to 1MB and other styling tweaks

* fix highlighting for certain diff sections

* fix test

* add worker back as suggested

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
2020-07-01 00:34:03 +03:00

92 lines
3.9 KiB
Go

package c
import (
. "github.com/alecthomas/chroma" // nolint
"github.com/alecthomas/chroma/lexers/internal"
)
// C lexer.
var C = internal.Register(MustNewLexer(
&Config{
Name: "C",
Aliases: []string{"c"},
Filenames: []string{"*.c", "*.h", "*.idc"},
MimeTypes: []string{"text/x-chdr", "text/x-csrc"},
},
Rules{
"whitespace": {
{`^#if\s+0`, CommentPreproc, Push("if0")},
{`^#`, CommentPreproc, Push("macro")},
{`^(\s*(?:/[*].*?[*]/\s*)?)(#if\s+0)`, ByGroups(UsingSelf("root"), CommentPreproc), Push("if0")},
{`^(\s*(?:/[*].*?[*]/\s*)?)(#)`, ByGroups(UsingSelf("root"), CommentPreproc), Push("macro")},
{`\n`, Text, nil},
{`\s+`, Text, nil},
{`\\\n`, Text, nil},
{`//(\n|[\w\W]*?[^\\]\n)`, CommentSingle, nil},
{`/(\\\n)?[*][\w\W]*?[*](\\\n)?/`, CommentMultiline, nil},
{`/(\\\n)?[*][\w\W]*`, CommentMultiline, nil},
},
"statements": {
{`(L?)(")`, ByGroups(LiteralStringAffix, LiteralString), Push("string")},
{`(L?)(')(\\.|\\[0-7]{1,3}|\\x[a-fA-F0-9]{1,2}|[^\\\'\n])(')`, ByGroups(LiteralStringAffix, LiteralStringChar, LiteralStringChar, LiteralStringChar), nil},
{`(\d+\.\d*|\.\d+|\d+)[eE][+-]?\d+[LlUu]*`, LiteralNumberFloat, nil},
{`(\d+\.\d*|\.\d+|\d+[fF])[fF]?`, LiteralNumberFloat, nil},
{`0x[0-9a-fA-F]+[LlUu]*`, LiteralNumberHex, nil},
{`0[0-7]+[LlUu]*`, LiteralNumberOct, nil},
{`\d+[LlUu]*`, LiteralNumberInteger, nil},
{`\*/`, Error, nil},
{`[~!%^&*+=|?:<>/-]`, Operator, nil},
{`[()\[\],.]`, Punctuation, nil},
{Words(``, `\b`, `asm`, `auto`, `break`, `case`, `const`, `continue`, `default`, `do`, `else`, `enum`, `extern`, `for`, `goto`, `if`, `register`, `restricted`, `return`, `sizeof`, `static`, `struct`, `switch`, `typedef`, `union`, `volatile`, `while`), Keyword, nil},
{`(bool|int|long|float|short|double|char|unsigned|signed|void)\b`, KeywordType, nil},
{Words(``, `\b`, `inline`, `_inline`, `__inline`, `naked`, `restrict`, `thread`, `typename`), KeywordReserved, nil},
{`(__m(128i|128d|128|64))\b`, KeywordReserved, nil},
{Words(`__`, `\b`, `asm`, `int8`, `based`, `except`, `int16`, `stdcall`, `cdecl`, `fastcall`, `int32`, `declspec`, `finally`, `int64`, `try`, `leave`, `wchar_t`, `w64`, `unaligned`, `raise`, `noop`, `identifier`, `forceinline`, `assume`), KeywordReserved, nil},
{`(true|false|NULL)\b`, NameBuiltin, nil},
{`([a-zA-Z_]\w*)(\s*)(:)(?!:)`, ByGroups(NameLabel, Text, Punctuation), nil},
{`[a-zA-Z_]\w*`, Name, nil},
},
"root": {
Include("whitespace"),
{`((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;{]*)(\{)`, ByGroups(UsingSelf("root"), NameFunction, UsingSelf("root"), UsingSelf("root"), Punctuation), Push("function")},
{`((?:[\w*\s])+?(?:\s|[*]))([a-zA-Z_]\w*)(\s*\([^;]*?\))([^;]*)(;)`, ByGroups(UsingSelf("root"), NameFunction, UsingSelf("root"), UsingSelf("root"), Punctuation), nil},
Default(Push("statement")),
},
"statement": {
Include("whitespace"),
Include("statements"),
{`[{}]`, Punctuation, nil},
{`;`, Punctuation, Pop(1)},
},
"function": {
Include("whitespace"),
Include("statements"),
{`;`, Punctuation, nil},
{`\{`, Punctuation, Push()},
{`\}`, Punctuation, Pop(1)},
},
"string": {
{`"`, LiteralString, Pop(1)},
{`\\([\\abfnrtv"\']|x[a-fA-F0-9]{2,4}|u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8}|[0-7]{1,3})`, LiteralStringEscape, nil},
{`[^\\"\n]+`, LiteralString, nil},
{`\\\n`, LiteralString, nil},
{`\\`, LiteralString, nil},
},
"macro": {
{`(include)(\s*(?:/[*].*?[*]/\s*)?)([^\n]+)`, ByGroups(CommentPreproc, Text, CommentPreprocFile), nil},
{`[^/\n]+`, CommentPreproc, nil},
{`/[*](.|\n)*?[*]/`, CommentMultiline, nil},
{`//.*?\n`, CommentSingle, Pop(1)},
{`/`, CommentPreproc, nil},
{`(?<=\\)\n`, CommentPreproc, nil},
{`\n`, CommentPreproc, Pop(1)},
},
"if0": {
{`^\s*#if.*?(?<!\\)\n`, CommentPreproc, Push()},
{`^\s*#el(?:se|if).*\n`, CommentPreproc, Pop(1)},
{`^\s*#endif.*?(?<!\\)\n`, CommentPreproc, Pop(1)},
{`.*?\n`, Comment, nil},
},
},
))