gopkg.in/alecthomas/gometalinter.v3@v3.0.0/_linters/src/github.com/client9/misspell/notwords.go (about)

     1  package misspell
     2  
     3  import (
     4  	"bytes"
     5  	"regexp"
     6  	"strings"
     7  )
     8  
     9  var (
    10  	reEmail     = regexp.MustCompile(`[a-zA-Z0-9_.%+-]+@[a-zA-Z0-9-.]+\.[a-zA-Z]{2,6}[^a-zA-Z]`)
    11  	reHost      = regexp.MustCompile(`[a-zA-Z0-9-.]+\.[a-zA-Z]+`)
    12  	reBackslash = regexp.MustCompile(`\\[a-z]`)
    13  )
    14  
    15  // RemovePath attempts to strip away embedded file system paths, e.g.
    16  //  /foo/bar or /static/myimg.png
    17  //
    18  //  TODO: windows style
    19  //
    20  func RemovePath(s string) string {
    21  	out := bytes.Buffer{}
    22  	var idx int
    23  	for len(s) > 0 {
    24  		if idx = strings.IndexByte(s, '/'); idx == -1 {
    25  			out.WriteString(s)
    26  			break
    27  		}
    28  
    29  		if idx > 0 {
    30  			idx--
    31  		}
    32  
    33  		var chclass string
    34  		switch s[idx] {
    35  		case '/', ' ', '\n', '\t', '\r':
    36  			chclass = " \n\r\t"
    37  		case '[':
    38  			chclass = "]\n"
    39  		case '(':
    40  			chclass = ")\n"
    41  		default:
    42  			out.WriteString(s[:idx+2])
    43  			s = s[idx+2:]
    44  			continue
    45  		}
    46  
    47  		endx := strings.IndexAny(s[idx+1:], chclass)
    48  		if endx != -1 {
    49  			out.WriteString(s[:idx+1])
    50  			out.Write(bytes.Repeat([]byte{' '}, endx))
    51  			s = s[idx+endx+1:]
    52  		} else {
    53  			out.WriteString(s)
    54  			break
    55  		}
    56  	}
    57  	return out.String()
    58  }
    59  
    60  // replaceWithBlanks returns a string with the same number of spaces as the input
    61  func replaceWithBlanks(s string) string {
    62  	return strings.Repeat(" ", len(s))
    63  }
    64  
    65  // RemoveEmail remove email-like strings, e.g. "nickg+junk@xfoobar.com", "nickg@xyz.abc123.biz"
    66  func RemoveEmail(s string) string {
    67  	return reEmail.ReplaceAllStringFunc(s, replaceWithBlanks)
    68  }
    69  
    70  // RemoveHost removes host-like strings "foobar.com" "abc123.fo1231.biz"
    71  func RemoveHost(s string) string {
    72  	return reHost.ReplaceAllStringFunc(s, replaceWithBlanks)
    73  }
    74  
    75  // RemoveBackslashEscapes removes characters that are preceeded by a backslash
    76  // commonly found in printf format stringd "\nto"
    77  func removeBackslashEscapes(s string) string {
    78  	return reBackslash.ReplaceAllStringFunc(s, replaceWithBlanks)
    79  }
    80  
    81  // RemoveNotWords blanks out all the not words
    82  func RemoveNotWords(s string) string {
    83  	// do most selective/specific first
    84  	return removeBackslashEscapes(RemoveHost(RemoveEmail(RemovePath(StripURL(s)))))
    85  }