File: splittext.go

package info (click to toggle)
golang-github-jung-kurt-gofpdf 2.17.2%2Bds-3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bullseye, sid
  • size: 2,368 kB
  • sloc: makefile: 51; awk: 7
file content (53 lines) | stat: -rw-r--r-- 1,018 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
package gofpdf

import (
	"math"
	//	"strings"
	"unicode"
)

// SplitText splits UTF-8 encoded text into several lines using the current
// font. Each line has its length limited to a maximum width given by w. This
// function can be used to determine the total height of wrapped text for
// vertical placement purposes.
func (f *Fpdf) SplitText(txt string, w float64) (lines []string) {
	cw := f.currentFont.Cw
	wmax := int(math.Ceil((w - 2*f.cMargin) * 1000 / f.fontSize))
	s := []rune(txt) // Return slice of UTF-8 runes
	nb := len(s)
	for nb > 0 && s[nb-1] == '\n' {
		nb--
	}
	s = s[0:nb]
	sep := -1
	i := 0
	j := 0
	l := 0
	for i < nb {
		c := s[i]
		l += cw[c]
		if unicode.IsSpace(c) || isChinese(c) {
			sep = i
		}
		if c == '\n' || l > wmax {
			if sep == -1 {
				if i == j {
					i++
				}
				sep = i
			} else {
				i = sep + 1
			}
			lines = append(lines, string(s[j:sep]))
			sep = -1
			j = i
			l = 0
		} else {
			i++
		}
	}
	if i != j {
		lines = append(lines, string(s[j:i]))
	}
	return lines
}