support the open-icon of folder

modules/fileicon/basic.go

@@ -6,22 +6,26 @@ package fileicon
 import (
 	"html/template"
 
-	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/svg"
+	"code.gitea.io/gitea/modules/util"
 )
 
-func BasicThemeIcon(entry *git.TreeEntry) template.HTML {
+func BasicEntryIconName(entry *EntryInfo) string {
 	svgName := "octicon-file"
 	switch {
-	case entry.IsLink():
+	case entry.EntryMode.IsLink():
 		svgName = "octicon-file-symlink-file"
-		if te, err := entry.FollowLink(); err == nil && te.IsDir() {
+		if entry.SymlinkToMode.IsDir() {
 			svgName = "octicon-file-directory-symlink"
 		}
-	case entry.IsDir():
-		svgName = "octicon-file-directory-fill"
-	case entry.IsSubModule():
+	case entry.EntryMode.IsDir():
+		svgName = util.Iif(entry.IsOpen, "octicon-file-directory-open-fill", "octicon-file-directory-fill")
+	case entry.EntryMode.IsSubModule():
 		svgName = "octicon-file-submodule"
 	}
-	return svg.RenderHTML(svgName)
+	return svgName
+}
+
+func BasicEntryIconHTML(entry *EntryInfo) template.HTML {
+	return svg.RenderHTML(BasicEntryIconName(entry))
 }

modules/fileicon/entry.go

@@ -0,0 +1,31 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package fileicon
+
+import "code.gitea.io/gitea/modules/git"
+
+type EntryInfo struct {
+	FullName      string
+	EntryMode     git.EntryMode
+	SymlinkToMode git.EntryMode
+	IsOpen        bool
+}
+
+func EntryInfoFromGitTreeEntry(gitEntry *git.TreeEntry) *EntryInfo {
+	ret := &EntryInfo{FullName: gitEntry.Name(), EntryMode: gitEntry.Mode()}
+	if gitEntry.IsLink() {
+		if te, err := gitEntry.FollowLink(); err == nil && te.IsDir() {
+			ret.SymlinkToMode = te.Mode()
+		}
+	}
+	return ret
+}
+
+func EntryInfoFolder() *EntryInfo {
+	return &EntryInfo{EntryMode: git.EntryModeTree}
+}
+
+func EntryInfoFolderOpen() *EntryInfo {
+	return &EntryInfo{EntryMode: git.EntryModeTree, IsOpen: true}
+}

modules/fileicon/material.go

@@ -9,11 +9,12 @@ import (
 	"strings"
 	"sync"
 
-	"code.gitea.io/gitea/modules/git"
 	"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 {
@@ -69,41 +70,51 @@ func (m *MaterialIconProvider) renderFileIconSVG(p *RenderedIconPool, name, svg,
 	}
 	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] = template.HTML(`<svg id="` + svgID + `" ` + svgCommonAttrs + svg[4:])
+		p.IconSVGs[svgID] = svgHTML
 	}
 	return template.HTML(`<svg ` + svgCommonAttrs + `><use xlink:href="#` + svgID + `"></use></svg>`)
 }
 
-func (m *MaterialIconProvider) FileIcon(p *RenderedIconPool, entry *git.TreeEntry) template.HTML {
+func (m *MaterialIconProvider) EntryIconHTML(p *RenderedIconPool, entry *EntryInfo) template.HTML {
 	if m.rules == nil {
-		return BasicThemeIcon(entry)
+		return BasicEntryIconHTML(entry)
 	}
 
-	if entry.IsLink() {
-		if te, err := entry.FollowLink(); err == nil && te.IsDir() {
+	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.findIconNameByGit(entry)
-	// the material icon pack's "folder" icon doesn't look good, so use our built-in one
-	// keep the old "octicon-xxx" class name to make some "theme plugin selector" could still work
-	if iconSVG, ok := m.svgs[name]; ok && name != "folder" && iconSVG != "" {
-		// keep the old "octicon-xxx" class name to make some "theme plugin selector" could still work
-		extraClass := "octicon-file"
-		switch {
-		case entry.IsDir():
-			extraClass = "octicon-file-directory-fill"
-		case entry.IsSubModule():
-			extraClass = "octicon-file-submodule"
+	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)
 		}
-		return m.renderFileIconSVG(p, name, iconSVG, extraClass)
 	}
-	// TODO: use an interface or wrapper for git.Entry to make the code testable.
-	return BasicThemeIcon(entry)
+
+	// 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 {
@@ -118,13 +129,17 @@ func (m *MaterialIconProvider) findIconNameWithLangID(s string) string {
 	return ""
 }
 
-func (m *MaterialIconProvider) FindIconName(name string, isDir bool) string {
-	fileNameLower := strings.ToLower(path.Base(name))
-	if isDir {
+func (m *MaterialIconProvider) FindIconName(entry *EntryInfo) string {
+	if entry.EntryMode.IsSubModule() {
+		return "folder-git"
+	}
+
+	fileNameLower := strings.ToLower(path.Base(entry.FullName))
+	if entry.EntryMode.IsDir() {
 		if s, ok := m.rules.FolderNames[fileNameLower]; ok {
 			return s
 		}
-		return "folder"
+		return util.Iif(entry.IsOpen, "folder-open", "folder")
 	}
 
 	if s, ok := m.rules.FileNames[fileNameLower]; ok {
@@ -146,10 +161,3 @@ func (m *MaterialIconProvider) FindIconName(name string, isDir bool) string {
 
 	return "file"
 }
-
-func (m *MaterialIconProvider) findIconNameByGit(entry *git.TreeEntry) string {
-	if entry.IsSubModule() {
-		return "folder-git"
-	}
-	return m.FindIconName(entry.Name(), entry.IsDir())
-}

modules/fileicon/material_test.go

@@ -8,6 +8,7 @@ import (
 
 	"code.gitea.io/gitea/models/unittest"
 	"code.gitea.io/gitea/modules/fileicon"
+	"code.gitea.io/gitea/modules/git"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -19,8 +20,8 @@ func TestMain(m *testing.M) {
 func TestFindIconName(t *testing.T) {
 	unittest.PrepareTestEnv(t)
 	p := fileicon.DefaultMaterialIconProvider()
-	assert.Equal(t, "php", p.FindIconName("foo.php", false))
-	assert.Equal(t, "php", p.FindIconName("foo.PHP", false))
-	assert.Equal(t, "javascript", p.FindIconName("foo.js", false))
-	assert.Equal(t, "visualstudio", p.FindIconName("foo.vba", false))
+	assert.Equal(t, "php", p.FindIconName(&fileicon.EntryInfo{FullName: "foo.php", EntryMode: git.EntryModeBlob}))
+	assert.Equal(t, "php", p.FindIconName(&fileicon.EntryInfo{FullName: "foo.PHP", EntryMode: git.EntryModeBlob}))
+	assert.Equal(t, "javascript", p.FindIconName(&fileicon.EntryInfo{FullName: "foo.js", EntryMode: git.EntryModeBlob}))
+	assert.Equal(t, "visualstudio", p.FindIconName(&fileicon.EntryInfo{FullName: "foo.vba", EntryMode: git.EntryModeBlob}))
 }

modules/fileicon/render.go

@@ -7,7 +7,6 @@ import (
 	"html/template"
 	"strings"
 
-	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
 )
 
@@ -34,19 +33,9 @@ func (p *RenderedIconPool) RenderToHTML() template.HTML {
 	return template.HTML(sb.String())
 }
 
-// TODO: use an interface or struct to replace "*git.TreeEntry", to decouple the fileicon module from git module
-
-func RenderEntryIcon(renderedIconPool *RenderedIconPool, entry *git.TreeEntry) template.HTML {
-	if setting.UI.FileIconTheme == "material" {
-		return DefaultMaterialIconProvider().FileIcon(renderedIconPool, entry)
-	}
-	return BasicThemeIcon(entry)
-}
-
-func RenderEntryIconOpen(renderedIconPool *RenderedIconPool, entry *git.TreeEntry) template.HTML {
-	// TODO: add "open icon" support
+func RenderEntryIconHTML(renderedIconPool *RenderedIconPool, entry *EntryInfo) template.HTML {
 	if setting.UI.FileIconTheme == "material" {
-		return DefaultMaterialIconProvider().FileIcon(renderedIconPool, entry)
+		return DefaultMaterialIconProvider().EntryIconHTML(renderedIconPool, entry)
 	}
-	return BasicThemeIcon(entry)
+	return BasicEntryIconHTML(entry)
 }

modules/git/tree_entry_mode.go

@@ -30,6 +30,31 @@ func (e EntryMode) String() string {
 	return strconv.FormatInt(int64(e), 8)
 }
 
+// IsSubModule if the entry is a sub module
+func (e EntryMode) IsSubModule() bool {
+	return e == EntryModeCommit
+}
+
+// IsDir if the entry is a sub dir
+func (e EntryMode) IsDir() bool {
+	return e == EntryModeTree
+}
+
+// IsLink if the entry is a symlink
+func (e EntryMode) IsLink() bool {
+	return e == EntryModeSymlink
+}
+
+// IsRegular if the entry is a regular file
+func (e EntryMode) IsRegular() bool {
+	return e == EntryModeBlob
+}
+
+// IsExecutable if the entry is an executable file (not necessarily binary)
+func (e EntryMode) IsExecutable() bool {
+	return e == EntryModeExec
+}
+
 func ParseEntryMode(mode string) (EntryMode, error) {
 	switch mode {
 	case "000000":

modules/git/tree_entry_nogogit.go

@@ -59,27 +59,27 @@ func (te *TreeEntry) Size() int64 {
 
 // IsSubModule if the entry is a sub module
 func (te *TreeEntry) IsSubModule() bool {
-	return te.entryMode == EntryModeCommit
+	return te.entryMode.IsSubModule()
 }
 
 // IsDir if the entry is a sub dir
 func (te *TreeEntry) IsDir() bool {
-	return te.entryMode == EntryModeTree
+	return te.entryMode.IsDir()
 }
 
 // IsLink if the entry is a symlink
 func (te *TreeEntry) IsLink() bool {
-	return te.entryMode == EntryModeSymlink
+	return te.entryMode.IsLink()
 }
 
 // IsRegular if the entry is a regular file
 func (te *TreeEntry) IsRegular() bool {
-	return te.entryMode == EntryModeBlob
+	return te.entryMode.IsRegular()
 }
 
 // IsExecutable if the entry is an executable file (not necessarily binary)
 func (te *TreeEntry) IsExecutable() bool {
-	return te.entryMode == EntryModeExec
+	return te.entryMode.IsExecutable()
 }
 
 // Blob returns the blob object the entry

routers/web/repo/commit.go

@@ -21,6 +21,7 @@ import (
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/charset"
+	"code.gitea.io/gitea/modules/fileicon"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/log"
@@ -369,7 +370,11 @@ func Diff(ctx *context.Context) {
 			return
 		}
 
-		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(diffTree, nil)
+		renderedIconPool := fileicon.NewRenderedIconPool()
+		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(renderedIconPool, diffTree, nil)
+		ctx.PageData["FolderIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolder())
+		ctx.PageData["FolderOpenIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolderOpen())
+		ctx.Data["FileIconPoolHTML"] = renderedIconPool.RenderToHTML()
 	}
 
 	statuses, _, err := git_model.GetLatestCommitStatus(ctx, ctx.Repo.Repository.ID, commitID, db.ListOptionsAll)

routers/web/repo/compare.go

@@ -26,6 +26,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/charset"
 	csv_module "code.gitea.io/gitea/modules/csv"
+	"code.gitea.io/gitea/modules/fileicon"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/log"
@@ -639,7 +640,11 @@ func PrepareCompareDiff(
 			return false
 		}
 
-		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(diffTree, nil)
+		renderedIconPool := fileicon.NewRenderedIconPool()
+		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(renderedIconPool, diffTree, nil)
+		ctx.PageData["FolderIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolder())
+		ctx.PageData["FolderOpenIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolderOpen())
+		ctx.Data["FileIconPoolHTML"] = renderedIconPool.RenderToHTML()
 	}
 
 	headCommit, err := ci.HeadGitRepo.GetCommit(headCommitID)

routers/web/repo/pull.go

@@ -24,6 +24,7 @@ import (
 	"code.gitea.io/gitea/models/unit"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/emoji"
+	"code.gitea.io/gitea/modules/fileicon"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
 	issue_template "code.gitea.io/gitea/modules/issue/template"
@@ -823,7 +824,12 @@ func viewPullFiles(ctx *context.Context, specifiedStartCommit, specifiedEndCommi
 		if reviewState != nil {
 			filesViewedState = reviewState.UpdatedFiles
 		}
-		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(diffTree, filesViewedState)
+
+		renderedIconPool := fileicon.NewRenderedIconPool()
+		ctx.PageData["DiffFileTree"] = transformDiffTreeForWeb(renderedIconPool, diffTree, filesViewedState)
+		ctx.PageData["FolderIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolder())
+		ctx.PageData["FolderOpenIcon"] = fileicon.RenderEntryIconHTML(renderedIconPool, fileicon.EntryInfoFolderOpen())
+		ctx.Data["FileIconPoolHTML"] = renderedIconPool.RenderToHTML()
 	}
 
 	ctx.Data["Diff"] = diff

routers/web/repo/treelist.go

@@ -4,6 +4,7 @@
 package repo
 
 import (
+	"html/template"
 	"net/http"
 	"strings"
 
@@ -67,7 +68,7 @@ type WebDiffFileItem struct {
 	EntryMode   string
 	IsViewed    bool
 	Children    []*WebDiffFileItem
-	// TODO: add icon support in the future
+	FileIcon    template.HTML
 }
 
 // WebDiffFileTree is used by frontend, check the field names in frontend before changing
@@ -77,7 +78,7 @@ type WebDiffFileTree struct {
 
 // transformDiffTreeForWeb transforms a gitdiff.DiffTree into a WebDiffFileTree for Web UI rendering
 // it also takes a map of file names to their viewed state, which is used to mark files as viewed
-func transformDiffTreeForWeb(diffTree *gitdiff.DiffTree, filesViewedState map[string]pull_model.ViewedState) (dft WebDiffFileTree) {
+func transformDiffTreeForWeb(renderedIconPool *fileicon.RenderedIconPool, diffTree *gitdiff.DiffTree, filesViewedState map[string]pull_model.ViewedState) (dft WebDiffFileTree) {
 	dirNodes := map[string]*WebDiffFileItem{"": &dft.TreeRoot}
 	addItem := func(item *WebDiffFileItem) {
 		var parentPath string
@@ -110,6 +111,7 @@ func transformDiffTreeForWeb(diffTree *gitdiff.DiffTree, filesViewedState map[st
 		item := &WebDiffFileItem{FullName: file.HeadPath, DiffStatus: file.Status}
 		item.IsViewed = filesViewedState[item.FullName] == pull_model.Viewed
 		item.NameHash = git.HashFilePathForWebUI(item.FullName)
+		item.FileIcon = fileicon.RenderEntryIconHTML(renderedIconPool, &fileicon.EntryInfo{FullName: file.HeadPath, EntryMode: file.HeadMode})
 
 		switch file.HeadMode {
 		case git.EntryModeTree: