51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
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package markdown
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import (
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"fmt"
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"regexp"
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)
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var hyperlinkRe = regexp.MustCompile(`(?m)\[([^\[]+)\]\(([^\)]+)\)`)
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// linkify returns the terminal-formatted hyperlink for @url with the text : @label
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func linkify(url, label string) string {
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return fmt.Sprintf("\x1b]8;;%s\x1b\\%s\x1b]8;;\x1b\\", url, label)
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}
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// hyperlinkTransform the @input text using markdown-like syntax :
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// - "normal [link label](link url) normal"
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func hyperlinkTransform(input string) (string, error) {
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output := ""
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cursor := int(0)
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// 1. Replace for each match
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for _, match := range hyperlinkRe.FindAllStringSubmatchIndex(input, -1) {
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// (1) add gap between input start OR previous match
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output += input[cursor:match[0]]
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cursor = match[1]
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// (2) extract features
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var label, url string
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if match[3]-match[2] > 0 {
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label = input[match[2]:match[3]]
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}
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if match[5]-match[4] > 0 {
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url = input[match[4]:match[5]]
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}
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// (3) replace with hyperlink
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output += linkify(url, label)
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}
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// 2. Add end of input
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if cursor < len(input) {
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output += input[cursor:]
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}
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// 3. print final output
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return output, nil
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}
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