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internal: update implementation
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i582 committed Nov 18, 2020
1 parent add2d49 commit 6247516
Showing 1 changed file with 84 additions and 60 deletions.
144 changes: 84 additions & 60 deletions internal/parser.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ import (
)

// Parse parses the passed format string and applies styles, returning a styled string.
func Parse(format string) string {
func Parse(text string) string {
var resParts = make([]string, 0, 50)

var err error
Expand All @@ -17,133 +17,154 @@ func Parse(format string) string {
var lastToken string

var inText bool

var inFormat bool
var inStartFormat bool

var inFormatGroup bool
var inStartFormatGroup bool
var inEndFormatGroup bool

var lastIsFormatGroup bool
var needCheckFormatGroupStyle bool

var startBracketFound bool
var endBracketFound bool
var colonFound bool

inText = true
formatLen := len(format)
formatLen := len(text)

for index := 0; index < formatLen; index++ {
s := format[index]
s := text[index]

// if just text
if inText {
// find {{
if s == '{' && index+1 < formatLen && format[index+1] == '{' {
tempTokenEndIndex = index
resParts = append(resParts, format[tempTokenStartIndex:tempTokenEndIndex])

tempTokenStartIndex = index + 2

inFormatGroup = true
inFormat = false
inText = false

inStartFormatGroup = true
// if found {
if startBracketFound {
if s == '{' {
// index before {{
tempTokenEndIndex = index - 1

// last part before {{
resParts = append(resParts, text[tempTokenStartIndex:tempTokenEndIndex])

// index after {{
tempTokenStartIndex = index + 1

// set current state
inFormatGroup = true
inFormat = false
inText = false
}
startBracketFound = false
continue
}

// skip }
if inEndFormatGroup && s == '}' {
if s == '{' {
startBracketFound = true
continue
}

// if after {{}} no :: style
// if after {{}} no ::style
if needCheckFormatGroupStyle {
needCheckFormatGroupStyle = false

if !(s == ':' && index+1 < formatLen && format[index+1] == ':' && index+2 < formatLen && format[index+2] != ' ') {
if !(s == ':' && index+1 < formatLen && text[index+1] == ':' && index+2 < formatLen && text[index+2] != ' ') {
lastIsFormatGroup = false

if lastToken != "" {
resParts = append(resParts, "{{"+lastToken+"}}")
tempTokenStartIndex = index
}
}
}

// ::
if inEndFormatGroup && s == ':' && index+1 < formatLen && format[index+1] == ':' && index+2 < formatLen && format[index+2] != ' ' {
inFormatGroup = false
inFormat = true
inText = false
// if found :
if colonFound {
if s == ':' {
// index after ::
tempTokenStartIndex = index + 1

// set current state
inFormatGroup = false
inFormat = true
inText = false
}
colonFound = false
continue
}

inStartFormat = true
tempTokenStartIndex = index + 2
if s == ':' {
colonFound = true
continue
}

continue
}

// if in {{}}
if inFormatGroup {
// skip {
if inStartFormatGroup && s == '{' {
inStartFormatGroup = false
// if found }
if endBracketFound {
if s == '}' {
// index before }}
tempTokenEndIndex = index - 1

// part in {{}}
lastToken = text[tempTokenStartIndex:tempTokenEndIndex]

// set current state
inFormatGroup = false
inFormat = false
inText = true

lastIsFormatGroup = true
needCheckFormatGroupStyle = true
}
endBracketFound = false
continue
}

if s == '}' && index+1 < formatLen && format[index+1] == '}' {
inFormatGroup = false
inFormat = false
inText = true

inEndFormatGroup = true
lastIsFormatGroup = true
needCheckFormatGroupStyle = true

tempTokenEndIndex = index

lastToken = format[tempTokenStartIndex:tempTokenEndIndex]
if s == '}' {
endBracketFound = true
continue
}
continue
}

// if after {{}}
if inFormat {
// skip :
if inStartFormat && s == ':' {
inStartFormat = false
continue
}

if s == '|' {
// index before |
tempTokenEndIndex = index

singleFormat := format[tempTokenStartIndex:tempTokenEndIndex]
// text from :: or previous | to current |
singleFormat := text[tempTokenStartIndex:tempTokenEndIndex]
lastToken, err = ApplyStyle(lastToken, singleFormat)
if err != nil {
log.Fatalf("Error parse style string in '%s' format string: %v", format, err)
log.Fatalf("Error parse style string in '%s' text string: %v", text, err)
}

// index after |
tempTokenStartIndex = index + 1
continue
}

if !(s >= 'a' && s <= 'z' || s >= 'A' && s <= 'Z') && s != '|' && !(s >= '0' && s <= '9') && s != '#' {
tempTokenEndIndex = index

singleFormat := format[tempTokenStartIndex:tempTokenEndIndex]
// last format
singleFormat := text[tempTokenStartIndex:tempTokenEndIndex]
lastToken, err = ApplyStyle(lastToken, singleFormat)
if err != nil {
log.Fatalf("Error parse style string in '%s' format string: %v", format, err)
log.Fatalf("Error parse style string in '%s' text string: %v", text, err)
}

tempTokenStartIndex = index

resParts = append(resParts, lastToken)

// set current state
inFormatGroup = false
inFormat = false
inText = true

inEndFormatGroup = false
lastIsFormatGroup = false
continue
}
Expand All @@ -152,11 +173,14 @@ func Parse(format string) string {
}

if lastIsFormatGroup {
singleFormat := format[tempTokenStartIndex:]
lastToken, _ = ApplyStyle(lastToken, singleFormat)
singleFormat := text[tempTokenStartIndex:]
lastToken, err = ApplyStyle(lastToken, singleFormat)
if err != nil {
log.Fatalf("Error parse style string in '%s' text string: %v", text, err)
}
resParts = append(resParts, lastToken)
} else {
resParts = append(resParts, format[tempTokenStartIndex:])
resParts = append(resParts, text[tempTokenStartIndex:])
}

return strings.Join(resParts, "")
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