[asciidoctor-java] integrate code blocks with carbon.now

asciidoc-java/src/main/java/io/yupiik/asciidoc/renderer/html/SimpleHtmlRenderer.java

@@ -39,6 +39,7 @@
 import io.yupiik.asciidoc.renderer.Visitor;
 import io.yupiik.asciidoc.renderer.uri.DataResolver;
 
+import java.net.URLEncoder;
 import java.nio.file.Path;
 import java.util.Collection;
 import java.util.Comparator;
@@ -49,6 +50,7 @@
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
+import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.Locale.ROOT;
 import static java.util.Optional.ofNullable;
 import static java.util.stream.Collectors.joining;
@@ -323,6 +325,15 @@ public void visitText(final Text element) {
 
     @Override
     public void visitCode(final Code element) {
+        final var carbonNowBaseUrl = element.options().get("carbonNowBaseUrl");
+        if (carbonNowBaseUrl != null) { // consider the code block as an image
+            visitImage(new Macro("image", (carbonNowBaseUrl.isBlank() || "auto".equals(carbonNowBaseUrl) ?
+                    // todo: this needs to be tuned
+                    "https://carbon.now.sh/embed?bg=rgba%28171%2C184%2C195%2C100%29&t=vscode&wt=none&l=text%2Fx-java&width=680&ds=true&dsyoff=20px&dsblur=68px&wc=true&wa=true&pv=48px&ph=32px&ln=true&fl=1&fm=Droid+Sans+Mono&fs=13px&lh=133%25&si=false&es=2x&wm=false&code=" :
+                    carbonNowBaseUrl) + URLEncoder.encode(element.value(), UTF_8), element.options(), false));
+            return;
+        }
+
         builder.append("<pre");
         final var lang = element.options().getOrDefault("lang", element.options().get("language"));
         if (lang != null) {
@@ -513,7 +524,7 @@ protected void visitImage(final Macro element) {
             return;
         }
         builder.append(" <img src=\"").append(element.label())
-                .append("\" alt=\"").append(element.options().getOrDefault("", element.label()))
+                .append("\" alt=\"").append(element.options().getOrDefault("", element.options().getOrDefault("alt", element.label())))
                 .append("\">\n");
     }
 

asciidoc-java/src/test/java/io/yupiik/asciidoc/renderer/html/SimpleHtmlRendererTest.java

@@ -325,15 +325,14 @@ void xref() {
         assertRenderingContent("xref:foo.adoc[Bar]", " <a href=\"foo.html\">Bar</a>\n");
     }
 
-
     @Test
     void embeddedImage(@TempDir final Path work) throws IOException {
         final var base64 = "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";
         Files.createDirectories(work);
         Files.write(work.resolve("img.png"), Base64.getDecoder().decode(base64));
         final var doc = new Parser().parseBody("""
                 = Test
-                
+                                
                 image::img.png[logo]
                 """, new Parser.ParserContext(ContentResolver.of(Path.of("target/missing"))));
         final var renderer = new SimpleHtmlRenderer(new SimpleHtmlRenderer.Configuration()
@@ -348,6 +347,27 @@ void embeddedImage(@TempDir final Path work) throws IOException {
                 """.replace("$base64", base64), renderer.result());
     }
 
+    @Test
+    void carbonNowImage() {
+        final var doc = new Parser().parseBody("""
+                = Test
+                                
+                [source,carbonNowBaseUrl="auto",alt="image"]
+                ----
+                public record UserId(String name) {}
+                ----
+                """, new Parser.ParserContext(ContentResolver.of(Path.of("target/missing"))));
+        final var renderer = new SimpleHtmlRenderer(new SimpleHtmlRenderer.Configuration()
+                .setAttributes(Map.of("noheader", "true", "data-uri", "false"/*true would mean we depend on the http url at test time, we don't want that*/)));
+        renderer.visitBody(doc);
+        assertEquals("""
+                 <div>
+                  <h1>Test</h1>
+                 <img src="https://carbon.now.sh/embed?bg=rgba%28171%2C184%2C195%2C100%29&t=vscode&wt=none&l=text%2Fx-java&width=680&ds=true&dsyoff=20px&dsblur=68px&wc=true&wa=true&pv=48px&ph=32px&ln=true&fl=1&fm=Droid+Sans+Mono&fs=13px&lh=133%25&si=false&es=2x&wm=false&code=public+record+UserId%28String+name%29+%7B%7D%0A" alt="image">
+                 </div>
+                """, renderer.result());
+    }
+
     private void assertRendering(final String adoc, final String html) {
         final var doc = new Parser().parse(adoc, new Parser.ParserContext(ContentResolver.of(Path.of("target/missing"))));
         final var renderer = new SimpleHtmlRenderer();