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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| package emoji | ||
|
|
||
| import ( | ||
| _ "embed" | ||
| "encoding/json" | ||
| ) | ||
|
|
||
| func isValidEmoji(input []byte) bool { | ||
| _, exists := emojiMap[string(input)] | ||
| return exists | ||
| } | ||
|
|
||
| var ( | ||
| //go:embed emoji.json | ||
| emojiMapRaw []byte | ||
|
|
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| emojiMap map[string]string | ||
| ) | ||
|
|
||
| func init() { | ||
| rawMap := make(map[string][]string) | ||
| if err := json.Unmarshal(emojiMapRaw, &rawMap); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| emojiMap = make(map[string]string, len(rawMap)) | ||
| for emoji, keywords := range rawMap { | ||
| for i := range keywords { | ||
| emojiMap[keywords[i]] = emoji | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package emoji | ||
|
|
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| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "strconv" | ||
| "strings" | ||
| "unicode/utf8" | ||
|
|
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| "github.com/gomarkdown/markdown/ast" | ||
| ) | ||
|
|
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| func NewEmojiParser() *EmojiParser { | ||
| return &EmojiParser{ | ||
| seen: make(map[string]bool), | ||
| } | ||
| } | ||
|
|
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| // Node is a node containing an emoji | ||
| type Node struct { | ||
| ast.Leaf | ||
| } | ||
|
|
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| type EmojiParser struct { | ||
| seen map[string]bool | ||
| } | ||
|
|
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| func (p *EmojiParser) EmojiParser(data []byte) (parsedNode ast.Node, result []byte, newLength int) { | ||
| if p.seen[string(data)] { | ||
| // Already processed | ||
| return nil, nil, 0 | ||
| } | ||
| if bytes.Contains(data, []byte("class=\"emoji\"")) { | ||
| // Already processed | ||
| return nil, nil, 0 | ||
| } | ||
| dataLen := len(data) | ||
| if dataLen <= 1 { | ||
| // Not long enough to be an emoji | ||
| return nil, nil, 0 | ||
| } | ||
| if bytes.IndexByte(data, ':') == -1 { | ||
| // No emoji delimiters | ||
| return nil, nil, 0 | ||
| } | ||
| // Translate emojis to HTML | ||
| resData := make([]byte, 0) | ||
| startIndex := bytes.IndexByte(data, ':') | ||
| resData = append(resData, data[0:startIndex]...) | ||
| for { | ||
| if startIndex >= len(data) { | ||
| // Done | ||
| break | ||
| } | ||
| endIndex := bytes.IndexByte(data[startIndex+1:], ':') + startIndex + 1 | ||
| if endIndex > startIndex { | ||
| name := string(data[startIndex+1 : endIndex]) | ||
| if isValidEmoji([]byte(name)) { | ||
| startIndex = endIndex + 1 | ||
| url := fmt.Sprintf(`<img class="emoji" src=%q alt=":%s:"></img>`, GenerateEmojiURL(name), name) | ||
| resData = append(resData, []byte(url)...) | ||
| } else { | ||
| resData = append(resData, data[startIndex:endIndex]...) | ||
| startIndex = endIndex | ||
| } | ||
| if startIndex == dataLen { | ||
| break | ||
| } | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
| if startIndex < dataLen { | ||
| resData = append(resData, data[startIndex:]...) | ||
| } | ||
|
|
||
| if !bytes.Contains(resData, []byte("class=\"emoji\"")) { | ||
| // Processed with no changes | ||
| p.seen[string(resData)] = true | ||
| } | ||
|
|
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| return &ast.Softbreak{}, resData, dataLen | ||
| } | ||
|
|
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| func GenerateEmojiURL(emoji string) string { | ||
| code, exists := emojiMap[emoji] | ||
| if !exists { | ||
| return "" | ||
| } | ||
| res := "" | ||
| chars := utf8.RuneCountInString(code) | ||
| curChar := 1 | ||
| for _, c := range code { | ||
| tmp := strings.Trim(strings.ToLower(strconv.QuoteRuneToASCII(c)), "'") | ||
| if tmp != `\ufe0f` || (chars > 2 && curChar == chars) { | ||
| // Valid character to add | ||
| if curChar > 1 { | ||
| res += "-" | ||
| } | ||
| if len(tmp) == 1 { | ||
| res += fmt.Sprintf("%x", []byte(tmp)) | ||
| } else { | ||
| res += strings.TrimLeft(tmp[2:], "0") | ||
| } | ||
| } | ||
| curChar++ | ||
| } | ||
| return fmt.Sprintf("https://twemoji.maxcdn.com/2/svg/%s.svg", res) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| img.emoji { | ||
| cursor: pointer; | ||
| height: 1em; | ||
| width: 1em; | ||
| margin: 0 .05em 0 .1em; | ||
| vertical-align: -0.1em; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -2,5 +2,5 @@ package web | |
|
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| import "embed" | ||
|
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| //go:embed js/* index.gohtml | ||
| //go:embed js/* css/* index.gohtml | ||
| var WebFS embed.FS | ||