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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package svg
import (
"fmt"
"html/template"
"path"
"regexp"
"strings"
"code.gitea.io/gitea/modules/html"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/public"
)
var (
// SVGs contains discovered SVGs
SVGs = map[string]string{}
widthRe = regexp.MustCompile(`width="[0-9]+?"`)
heightRe = regexp.MustCompile(`height="[0-9]+?"`)
)
const defaultSize = 16
// Init discovers SVGs and populates the `SVGs` variable
func Init() error {
files, err := public.AssetFS().ListFiles("img/svg")
if err != nil {
return err
}
// Remove `xmlns` because inline SVG does not need it
reXmlns := regexp.MustCompile(`(<svg\b[^>]*?)\s+xmlns="[^"]*"`)
for _, file := range files {
if path.Ext(file) != ".svg" {
continue
}
bs, err := public.AssetFS().ReadFile("img/svg", file)
if err != nil {
log.Error("Failed to read SVG file %s: %v", file, err)
} else {
SVGs[file[:len(file)-4]] = reXmlns.ReplaceAllString(string(bs), "$1")
}
}
return nil
}
// RenderHTML renders icons - arguments icon name (string), size (int), class (string)
func RenderHTML(icon string, others ...interface{}) template.HTML {
size, class := html.ParseSizeAndClass(defaultSize, "", others...)
if svgStr, ok := SVGs[icon]; ok {
if size != defaultSize {
svgStr = widthRe.ReplaceAllString(svgStr, fmt.Sprintf(`width="%d"`, size))
svgStr = heightRe.ReplaceAllString(svgStr, fmt.Sprintf(`height="%d"`, size))
}
if class != "" {
svgStr = strings.Replace(svgStr, `class="`, fmt.Sprintf(`class="%s `, class), 1)
}
return template.HTML(svgStr)
}
return template.HTML("")
}
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