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50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
package parser
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import (
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"github.com/usememos/memos/plugin/gomark/ast"
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"github.com/usememos/memos/plugin/gomark/parser/tokenizer"
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)
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type BoldItalicParser struct{}
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func NewBoldItalicParser() InlineParser {
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return &BoldItalicParser{}
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}
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func (*BoldItalicParser) Match(tokens []*tokenizer.Token) (ast.Node, int) {
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matchedTokens := tokenizer.GetFirstLine(tokens)
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if len(matchedTokens) < 7 {
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return nil, 0
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}
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prefixTokens := matchedTokens[:3]
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if prefixTokens[0].Type != prefixTokens[1].Type || prefixTokens[0].Type != prefixTokens[2].Type || prefixTokens[1].Type != prefixTokens[2].Type {
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return nil, 0
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}
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prefixTokenType := prefixTokens[0].Type
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if prefixTokenType != tokenizer.Asterisk && prefixTokenType != tokenizer.Underscore {
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return nil, 0
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}
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cursor, matched := 3, false
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for ; cursor < len(matchedTokens)-2; cursor++ {
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token, nextToken, endToken := matchedTokens[cursor], matchedTokens[cursor+1], matchedTokens[cursor+2]
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if token.Type == tokenizer.Newline || nextToken.Type == tokenizer.Newline || endToken.Type == tokenizer.Newline {
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return nil, 0
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}
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if token.Type == prefixTokenType && nextToken.Type == prefixTokenType && endToken.Type == prefixTokenType {
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matchedTokens = matchedTokens[:cursor+3]
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matched = true
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break
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}
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}
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if !matched {
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return nil, 0
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}
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size := len(matchedTokens)
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return &ast.BoldItalic{
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Symbol: prefixTokenType,
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Content: tokenizer.Stringify(matchedTokens[3 : size-3]),
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}, len(matchedTokens)
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}
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