package printer
import (
"bytes"
"fmt"
"io"
"regexp"
"sort"
"github.com/golangci/dupl/syntax"
)
type html struct {
iota int
w io.Writer
ReadFile
}
func NewHTML(w io.Writer, fread ReadFile) Printer {
return &html{w: w, ReadFile: fread}
}
func (p *html) PrintHeader() error {
_, err := fmt.Fprint(p.w, `<!DOCTYPE html>
<meta charset="utf-8"/>
<title>Duplicates</title>
<style>
pre {
background-color: #FFD;
border: 1px solid #E2E2E2;
padding: 1ex;
}
</style>
`)
return err
}
func (p *html) PrintClones(dups [][]*syntax.Node) error {
p.iota++
fmt.Fprintf(p.w, "<h1>#%d found %d clones</h1>\n", p.iota, len(dups))
clones := make([]clone, len(dups))
for i, dup := range dups {
cnt := len(dup)
if cnt == 0 {
panic("zero length dup")
}
nstart := dup[0]
nend := dup[cnt-1]
file, err := p.ReadFile(nstart.Filename)
if err != nil {
return err
}
lineStart, _ := blockLines(file, nstart.Pos, nend.End)
cl := clone{filename: nstart.Filename, lineStart: lineStart}
start := findLineBeg(file, nstart.Pos)
content := append(toWhitespace(file[start:nstart.Pos]), file[nstart.Pos:nend.End]...)
cl.fragment = deindent(content)
clones[i] = cl
}
sort.Sort(byNameAndLine(clones))
for _, cl := range clones {
fmt.Fprintf(p.w, "<h2>%s:%d</h2>\n<pre>%s</pre>\n", cl.filename, cl.lineStart, cl.fragment)
}
return nil
}
func (*html) PrintFooter() error { return nil }
func findLineBeg(file []byte, index int) int {
for i := index; i >= 0; i-- {
if file[i] == '\n' {
return i + 1
}
}
return 0
}
func toWhitespace(str []byte) []byte {
var out []byte
for _, c := range bytes.Runes(str) {
if c == '\t' {
out = append(out, '\t')
} else {
out = append(out, ' ')
}
}
return out
}
func deindent(block []byte) []byte {
const maxVal = 99
min := maxVal
re := regexp.MustCompile(`(^|\n)(\t*)\S`)
for _, line := range re.FindAllSubmatch(block, -1) {
indent := line[2]
if len(indent) < min {
min = len(indent)
}
}
if min == 0 || min == maxVal {
return block
}
block = block[min:]
Loop:
for i := 0; i < len(block); i++ {
if block[i] == '\n' && i != len(block)-1 {
for j := 0; j < min; j++ {
if block[i+j+1] != '\t' {
continue Loop
}
}
block = append(block[:i+1], block[i+1+min:]...)
}
}
return block
}