Files
forge/modules/markup/html_emoji.go
zeekayandHanzo Dev aa87442fdd Record upstream authorship centrally in NOTICE instead of in every file header
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the
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SPDX line, so it no longer demands an upstream one.

Co-authored-by: Hanzo Dev <[email protected]>
2026-09-10 17:50:35 -07:00

125 lines
3.3 KiB
Go

// Copyright 2026 Hanzo AI, Inc. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"strings"
"unicode"
"github.com/hanzoai/git/modules/emoji"
"github.com/hanzoai/git/modules/setting"
"golang.org/x/net/html"
"golang.org/x/net/html/atom"
)
func createEmoji(ctx *RenderContext, content, name string) *html.Node {
span := &html.Node{
Type: html.ElementNode,
Data: atom.Span.String(),
Attr: []html.Attribute{},
}
span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
if name != "" {
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: name})
}
text := &html.Node{
Type: html.TextNode,
Data: content,
}
span.AppendChild(text)
return span
}
func createCustomEmoji(ctx *RenderContext, alias string) *html.Node {
span := &html.Node{
Type: html.ElementNode,
Data: atom.Span.String(),
Attr: []html.Attribute{},
}
span.Attr = append(span.Attr, ctx.RenderInternal.NodeSafeAttr("class", "emoji"))
span.Attr = append(span.Attr, html.Attribute{Key: "aria-label", Val: alias})
img := &html.Node{
Type: html.ElementNode,
DataAtom: atom.Img,
Data: "img",
Attr: []html.Attribute{},
}
img.Attr = append(img.Attr, html.Attribute{Key: "alt", Val: ":" + alias + ":"})
img.Attr = append(img.Attr, html.Attribute{Key: "src", Val: setting.StaticURLPrefix + "/assets/img/emoji/" + alias + ".png"})
span.AppendChild(img)
return span
}
// emojiShortCodeProcessor for rendering text like :smile: into emoji
func emojiShortCodeProcessor(ctx *RenderContext, node *html.Node) {
start := 0
next := node.NextSibling
for node != nil && node != next && start < len(node.Data) {
m := globalVars().emojiShortCodeRegex.FindStringSubmatchIndex(node.Data[start:])
if m == nil {
return
}
m[0] += start
m[1] += start
start = m[1]
// don't render a shortcode whose ":" directly follows a backtick (an unclosed code span)
if m[0] > 0 && node.Data[m[0]-1] == '`' {
continue
}
alias := node.Data[m[0]:m[1]]
var nextChar byte
if m[1] < len(node.Data) {
nextChar = node.Data[m[1]]
}
if nextChar == ':' || unicode.IsLetter(rune(nextChar)) || unicode.IsDigit(rune(nextChar)) {
continue
}
alias = strings.Trim(alias, ":")
converted := emoji.FromAlias(alias)
if converted != nil {
// standard emoji
replaceContent(node, m[0], m[1], createEmoji(ctx, converted.Emoji, converted.Description))
node = node.NextSibling.NextSibling
start = 0 // restart searching start since node has changed
} else if _, exist := setting.UI.CustomEmojisMap[alias]; exist {
// custom reaction
replaceContent(node, m[0], m[1], createCustomEmoji(ctx, alias))
node = node.NextSibling.NextSibling
start = 0 // restart searching start since node has changed
}
}
}
// emoji processor to match emoji and add emoji class
func emojiProcessor(ctx *RenderContext, node *html.Node) {
start := 0
next := node.NextSibling
for node != nil && node != next && start < len(node.Data) {
m := emoji.FindEmojiSubmatchIndex(node.Data[start:])
if m == nil {
return
}
m[0] += start
m[1] += start
codepoint := node.Data[m[0]:m[1]]
start = m[1]
val := emoji.FromCode(codepoint)
if val != nil {
replaceContent(node, m[0], m[1], createEmoji(ctx, codepoint, val.Description))
node = node.NextSibling.NextSibling
start = 0
}
}
}