markup: Add blockquote render hooks

Closes #12590

markup/goldmark/blockquotes/blockquotes_integration_test.go

@@ -0,0 +1,83 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blockquotes_test
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/gohugoio/hugo/hugolib"
+)
+
+func TestBlockquoteHook(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+[markup]
+  [markup.goldmark]
+    [markup.goldmark.parser]
+      [markup.goldmark.parser.attribute]
+        block = true
+        title = true
+-- layouts/_default/_markup/render-blockquote.html --
+Blockquote: |{{ .Text | safeHTML }}|{{ .Type }}|
+-- layouts/_default/_markup/render-blockquote-alert.html --
+{{ $text := .Text | safeHTML }}
+Blockquote Alert: |{{ $text }}|{{ .Type }}|
+Blockquote Alert Attributes: |{{ $text }}|{{ .Attributes }}|
+Blockquote Alert Page: |{{ $text }}|{{ .Page.Title }}|{{ .PageInner.Title }}|
+{{ if .Attributes.showpos }}
+Blockquote Alert Position: |{{ $text }}|{{ .Position | safeHTML }}|
+{{ end }}
+-- layouts/_default/single.html --
+Content: {{ .Content }}
+-- content/p1.md --
+---
+title: "p1"
+---
+
+> [!NOTE]  
+> This is a note with some whitespace after the alert type.
+
+
+> [!TIP]
+> This is a tip.
+
+>   [!CAUTION]
+> This is a caution with some whitespace before the alert type.
+
+> A regular blockquote.
+
+> [!TIP]
+> This is a tip with attributes.
+{class="foo bar" id="baz"}
+
+> [!NOTE]  
+> Note triggering showing the position.
+{showpos="true"}
+
+`
+
+	b := hugolib.Test(t, files)
+	b.AssertFileContent("public/p1/index.html",
+		"Blockquote Alert: |<p>This is a note with some whitespace after the alert type.</p>\n|alert|",
+		"Blockquote Alert: |<p>This is a tip.</p>",
+		"Blockquote Alert: |<p>This is a caution with some whitespace before the alert type.</p>\n|alert|",
+		"Blockquote: |<p>A regular blockquote.</p>\n|regular|",
+		"Blockquote Alert Attributes: |<p>This is a tip with attributes.</p>\n|map[class:foo bar id:baz]|",
+		filepath.FromSlash("/content/p1.md:20:3"),
+		"Blockquote Alert Page: |<p>This is a tip with attributes.</p>\n|p1|p1|",
+	)
+}