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|
package statusline
import (
"errors"
"fmt"
"strings"
"unicode"
"github.com/mattn/go-runewidth"
)
type renderParams struct {
width int
sep string
acct *accountState
fldr *folderState
}
type renderFunc func(r renderParams) string
func newRenderer(renderFormat, textMode string) renderFunc {
var texter Texter
switch strings.ToLower(textMode) {
case "icon":
texter = &icon{}
default:
texter = &text{}
}
return renderer(texter, renderFormat)
}
func renderer(texter Texter, renderFormat string) renderFunc {
var leftFmt, rightFmt string
if idx := strings.Index(renderFormat, "%>"); idx < 0 {
leftFmt = renderFormat
} else {
leftFmt, rightFmt = renderFormat[:idx], strings.Replace(renderFormat[idx:], "%>", "", 1)
}
return func(r renderParams) string {
lfmtStr, largs, err := parseStatuslineFormat(leftFmt, texter, r)
if err != nil {
return err.Error()
}
rfmtStr, rargs, err := parseStatuslineFormat(rightFmt, texter, r)
if err != nil {
return err.Error()
}
leftText, rightText := fmt.Sprintf(lfmtStr, largs...), fmt.Sprintf(rfmtStr, rargs...)
return runewidth.FillRight(leftText, r.width-len(rightText)-1) + rightText
}
}
func connectionInfo(acct *accountState, texter Texter) (conn string) {
if acct.ConnActivity != "" {
conn += acct.ConnActivity
} else {
if acct.Connected {
conn += texter.Connected()
} else {
conn += texter.Disconnected()
}
}
return
}
func contentInfo(acct *accountState, fldr *folderState, texter Texter) []string {
var status []string
if fldr.FilterActivity != "" {
status = append(status, fldr.FilterActivity)
} else {
if fldr.Filter != "" {
status = append(status, texter.FormatFilter(fldr.Filter))
}
}
if fldr.Search != "" {
status = append(status, texter.FormatSearch(fldr.Search))
}
return status
}
func trayInfo(acct *accountState, fldr *folderState, texter Texter) []string {
var tray []string
if fldr.Sorting {
tray = append(tray, texter.Sorting())
}
if fldr.Threading {
tray = append(tray, texter.Threading())
}
if acct.Passthrough {
tray = append(tray, texter.Passthrough())
}
return tray
}
func parseStatuslineFormat(format string, texter Texter, r renderParams) (string, []interface{}, error) {
retval := make([]byte, 0, len(format))
var args []interface{}
mute := false
var c rune
for i, ni := 0, 0; i < len(format); {
ni = strings.IndexByte(format[i:], '%')
if ni < 0 {
ni = len(format)
retval = append(retval, []byte(format[i:ni])...)
break
}
ni += i + 1
// Check for fmt flags
if ni == len(format) {
goto handle_end_error
}
c = rune(format[ni])
if c == '+' || c == '-' || c == '#' || c == ' ' || c == '0' {
ni++
}
// Check for precision and width
if ni == len(format) {
goto handle_end_error
}
c = rune(format[ni])
for unicode.IsDigit(c) {
ni++
c = rune(format[ni])
}
if c == '.' {
ni++
c = rune(format[ni])
for unicode.IsDigit(c) {
ni++
c = rune(format[ni])
}
}
retval = append(retval, []byte(format[i:ni])...)
// Get final format verb
if ni == len(format) {
goto handle_end_error
}
c = rune(format[ni])
switch c {
case '%':
retval = append(retval, '%')
case 'a':
retval = append(retval, 's')
args = append(args, r.acct.Name)
case 'c':
retval = append(retval, 's')
args = append(args, connectionInfo(r.acct, texter))
case 'd':
retval = append(retval, 's')
args = append(args, r.fldr.Name)
case 'm':
mute = true
case 'S':
var status []string
if conn := connectionInfo(r.acct, texter); conn != "" {
status = append(status, conn)
}
if r.acct.Connected {
status = append(status, contentInfo(r.acct, r.fldr, texter)...)
}
retval = append(retval, 's')
args = append(args, strings.Join(status, r.sep))
case 'T':
var tray []string
if r.acct.Connected {
tray = trayInfo(r.acct, r.fldr, texter)
}
retval = append(retval, 's')
args = append(args, strings.Join(tray, r.sep))
default:
// Just ignore it and print as is
// so %k in index format becomes %%k to Printf
retval = append(retval, '%')
retval = append(retval, byte(c))
}
i = ni + 1
}
if mute {
return "", nil, nil
}
return string(retval), args, nil
handle_end_error:
return "", nil,
errors.New("reached end of string while parsing statusline format")
}
|
