Create default link and image render hooks

Fixes #11933

5 files changed, 69 insertions, 8 deletions

diff --git a/tpl/template_info.go b/tpl/template_info.go
index b27debf1f..fd126d80f 100644
--- a/tpl/template_info.go
+++ b/tpl/template_info.go
@@ -25,6 +25,10 @@ type FileInfo interface {
 	Filename() string
 }
 
+type IsInternalTemplateProvider interface {
+	IsInternalTemplate() bool
+}
+
 type ParseInfo struct {
 	// Set for shortcode templates with any {{ .Inner }}
 	IsInner bool
diff --git a/tpl/tplimpl/embedded/templates/_default/_markup/render-image.html b/tpl/tplimpl/embedded/templates/_default/_markup/render-image.html
new file mode 100644
index 000000000..c90ababd2
--- /dev/null
+++ b/tpl/tplimpl/embedded/templates/_default/_markup/render-image.html
@@ -0,0 +1,15 @@
+{{- $u := urls.Parse .Destination -}}
+{{- $src := $u.String -}}
+{{- if not $u.IsAbs -}}
+  {{- with or (.Page.Resources.Get $u.Path) (resources.Get $u.Path) -}}
+    {{- $src = .RelPermalink -}}
+  {{- end -}}
+{{- end -}}
+{{- $attributes := dict "alt" .Text "src" $src "title" .Title -}}
+<img
+  {{- range $k, $v := $attributes -}}
+    {{- if $v -}}
+      {{- printf " %s=%q" $k $v | safeHTMLAttr -}}
+    {{- end -}}
+  {{- end -}}>
+{{- /**/ -}}
diff --git a/tpl/tplimpl/embedded/templates/_default/_markup/render-link.html b/tpl/tplimpl/embedded/templates/_default/_markup/render-link.html
new file mode 100644
index 000000000..bd64b204b
--- /dev/null
+++ b/tpl/tplimpl/embedded/templates/_default/_markup/render-link.html
@@ -0,0 +1,26 @@
+{{- $u := urls.Parse .Destination -}}
+{{- $href := $u.String -}}
+{{- if not $u.IsAbs -}}
+  {{- with or
+    ($.Page.GetPage $u.Path)
+    ($.Page.Resources.Get $u.Path)
+    (resources.Get $u.Path)
+  -}}
+    {{- $href = .RelPermalink -}}
+    {{- with $u.RawQuery -}}
+      {{- $href = printf "%s?%s" $href . -}}
+    {{- end -}}
+    {{- with $u.Fragment -}}
+      {{- $href = printf "%s#%s" $href . -}}
+    {{- end -}}
+  {{- end -}}
+{{- end -}}
+{{- $attributes := dict "href" $href "title" .Title -}}
+<a
+  {{- range $k, $v := $attributes -}}
+    {{- if $v -}}
+      {{- printf " %s=%q" $k $v | safeHTMLAttr -}}
+    {{- end -}}
+  {{- end -}}
+  >{{ .Text | safeHTML }}</a>
+{{- /**/ -}}
diff --git a/tpl/tplimpl/template.go b/tpl/tplimpl/template.go
index a8ba6815d..63dc29662 100644
--- a/tpl/tplimpl/template.go
+++ b/tpl/tplimpl/template.go
@@ -55,6 +55,7 @@ const (
 
 	shortcodesPathPrefix = "shortcodes/"
 	internalPathPrefix   = "_internal/"
+	embeddedPathPrefix   = "_embedded/"
 	baseFileBase         = "baseof"
 )
 
@@ -517,11 +518,19 @@ func (t *templateHandler) findLayout(d layouts.LayoutDescriptor, f output.Format
 
 func (t *templateHandler) newTemplateInfo(name, tpl string) templateInfo {
 	var isText bool
+	var isEmbedded bool
+
+	if strings.HasPrefix(name, embeddedPathPrefix) {
+		isEmbedded = true
+		name = strings.TrimPrefix(name, embeddedPathPrefix)
+	}
+
 	name, isText = t.nameIsText(name)
 	return templateInfo{
-		name:     name,
-		isText:   isText,
-		template: tpl,
+		name:       name,
+		isText:     isText,
+		isEmbedded: isEmbedded,
+		template:   tpl,
 	}
 }
 
@@ -772,7 +781,7 @@ func (t *templateHandler) loadEmbedded() error {
 		}
 
 		if _, found := t.Lookup(templateName); !found {
-			if err := t.AddTemplate(templateName, templ); err != nil {
+			if err := t.AddTemplate(embeddedPathPrefix+templateName, templ); err != nil {
 				return err
 			}
 		}
@@ -781,7 +790,7 @@ func (t *templateHandler) loadEmbedded() error {
 			// TODO(bep) avoid reparsing these aliases
 			for _, alias := range aliases {
 				alias = internalPathPrefix + alias
-				if err := t.AddTemplate(alias, templ); err != nil {
+				if err := t.AddTemplate(embeddedPathPrefix+alias, templ); err != nil {
 					return err
 				}
 			}
@@ -1026,6 +1035,8 @@ func (t *templateNamespace) parse(info templateInfo) (*templateState, error) {
 	return ts, nil
 }
 
+var _ tpl.IsInternalTemplateProvider = (*templateState)(nil)
+
 type templateState struct {
 	tpl.Template
 
@@ -1037,6 +1048,10 @@ type templateState struct {
 	baseInfo templateInfo // Set when a base template is used.
 }
 
+func (t *templateState) IsInternalTemplate() bool {
+	return t.info.isEmbedded
+}
+
 func (t *templateState) GetIdentity() identity.Identity {
 	return t.id
 }
diff --git a/tpl/tplimpl/template_errors.go b/tpl/tplimpl/template_errors.go
index 34e73a07a..a9d259220 100644
--- a/tpl/tplimpl/template_errors.go
+++ b/tpl/tplimpl/template_errors.go
@@ -24,9 +24,10 @@ import (
 var _ identity.Identity = (*templateInfo)(nil)
 
 type templateInfo struct {
-	name     string
-	template string
-	isText   bool // HTML or plain text template.
+	name       string
+	template   string
+	isText     bool // HTML or plain text template.
+	isEmbedded bool
 
 	meta *hugofs.FileMeta
 }