1 files changed, 162 insertions, 0 deletions
diff --git a/modules/fileicon/material.go b/modules/fileicon/material.go
new file mode 100644
index 0000000000..5361592d8a
--- /dev/null
+++ b/modules/fileicon/material.go
@@ -0,0 +1,162 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package fileicon
+
+import (
+	"html/template"
+	"strings"
+	"sync"
+
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/options"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/svg"
+	"code.gitea.io/gitea/modules/util"
+)
+
+type materialIconRulesData struct {
+	FileNames      map[string]string `json:"fileNames"`
+	FolderNames    map[string]string `json:"folderNames"`
+	FileExtensions map[string]string `json:"fileExtensions"`
+	LanguageIDs    map[string]string `json:"languageIds"`
+}
+
+type MaterialIconProvider struct {
+	once  sync.Once
+	rules *materialIconRulesData
+	svgs  map[string]string
+}
+
+var materialIconProvider MaterialIconProvider
+
+func DefaultMaterialIconProvider() *MaterialIconProvider {
+	materialIconProvider.once.Do(materialIconProvider.loadData)
+	return &materialIconProvider
+}
+
+func (m *MaterialIconProvider) loadData() {
+	buf, err := options.AssetFS().ReadFile("fileicon/material-icon-rules.json")
+	if err != nil {
+		log.Error("Failed to read material icon rules: %v", err)
+		return
+	}
+	err = json.Unmarshal(buf, &m.rules)
+	if err != nil {
+		log.Error("Failed to unmarshal material icon rules: %v", err)
+		return
+	}
+
+	buf, err = options.AssetFS().ReadFile("fileicon/material-icon-svgs.json")
+	if err != nil {
+		log.Error("Failed to read material icon rules: %v", err)
+		return
+	}
+	err = json.Unmarshal(buf, &m.svgs)
+	if err != nil {
+		log.Error("Failed to unmarshal material icon rules: %v", err)
+		return
+	}
+	log.Debug("Loaded material icon rules and SVG images")
+}
+
+func (m *MaterialIconProvider) renderFileIconSVG(p *RenderedIconPool, name, svg, extraClass string) template.HTML {
+	// This part is a bit hacky, but it works really well. It should be safe to do so because all SVG icons are generated by us.
+	// Will try to refactor this in the future.
+	if !strings.HasPrefix(svg, "<svg") {
+		panic("Invalid SVG icon")
+	}
+	svgID := "svg-mfi-" + name
+	svgCommonAttrs := `class="svg git-entry-icon ` + extraClass + `" width="16" height="16" aria-hidden="true"`
+	svgHTML := template.HTML(`<svg id="` + svgID + `" ` + svgCommonAttrs + svg[4:])
+	if p == nil {
+		return svgHTML
+	}
+	if p.IconSVGs[svgID] == "" {
+		p.IconSVGs[svgID] = svgHTML
+	}
+	return template.HTML(`<svg ` + svgCommonAttrs + `><use xlink:href="#` + svgID + `"></use></svg>`)
+}
+
+func (m *MaterialIconProvider) EntryIconHTML(p *RenderedIconPool, entry *EntryInfo) template.HTML {
+	if m.rules == nil {
+		return BasicEntryIconHTML(entry)
+	}
+
+	if entry.EntryMode.IsLink() {
+		if entry.SymlinkToMode.IsDir() {
+			// keep the old "octicon-xxx" class name to make some "theme plugin selector" could still work
+			return svg.RenderHTML("material-folder-symlink", 16, "octicon-file-directory-symlink")
+		}
+		return svg.RenderHTML("octicon-file-symlink-file") // TODO: find some better icons for them
+	}
+
+	name := m.FindIconName(entry)
+	iconSVG := m.svgs[name]
+	if iconSVG == "" {
+		name = "file"
+		if entry.EntryMode.IsDir() {
+			name = util.Iif(entry.IsOpen, "folder-open", "folder")
+		}
+		iconSVG = m.svgs[name]
+		if iconSVG == "" {
+			setting.PanicInDevOrTesting("missing file icon for %s", name)
+		}
+	}
+
+	// keep the old "octicon-xxx" class name to make some "theme plugin selector" could still work
+	extraClass := "octicon-file"
+	switch {
+	case entry.EntryMode.IsDir():
+		extraClass = BasicEntryIconName(entry)
+	case entry.EntryMode.IsSubModule():
+		extraClass = "octicon-file-submodule"
+	}
+	return m.renderFileIconSVG(p, name, iconSVG, extraClass)
+}
+
+func (m *MaterialIconProvider) findIconNameWithLangID(s string) string {
+	if _, ok := m.svgs[s]; ok {
+		return s
+	}
+	if s, ok := m.rules.LanguageIDs[s]; ok {
+		if _, ok = m.svgs[s]; ok {
+			return s
+		}
+	}
+	return ""
+}
+
+func (m *MaterialIconProvider) FindIconName(entry *EntryInfo) string {
+	if entry.EntryMode.IsSubModule() {
+		return "folder-git"
+	}
+
+	fileNameLower := strings.ToLower(entry.BaseName)
+	if entry.EntryMode.IsDir() {
+		if s, ok := m.rules.FolderNames[fileNameLower]; ok {
+			return s
+		}
+		return util.Iif(entry.IsOpen, "folder-open", "folder")
+	}
+
+	if s, ok := m.rules.FileNames[fileNameLower]; ok {
+		if s = m.findIconNameWithLangID(s); s != "" {
+			return s
+		}
+	}
+
+	for i := len(fileNameLower) - 1; i >= 0; i-- {
+		if fileNameLower[i] == '.' {
+			ext := fileNameLower[i+1:]
+			if s, ok := m.rules.FileExtensions[ext]; ok {
+				if s = m.findIconNameWithLangID(s); s != "" {
+					return s
+				}
+			}
+		}
+	}
+
+	return "file"
+}