From 6e2c022c450e875affdad0e1227f327924006392 Mon Sep 17 00:00:00 2001
From: Gabriel Arazas <foodogsquared@foodogsquared.one>
Date: Fri, 24 Nov 2023 20:31:25 +0800
Subject: [PATCH] Add image block for HTML5-modified

---
 .../converters/html5-extended.rb              |  61 +++++++-
 spec/html5_extended_converter.rb              | 138 ++++++++++++++++++
 2 files changed, 198 insertions(+), 1 deletion(-)

diff --git a/lib/asciidoctor/foodogsquared/converters/html5-extended.rb b/lib/asciidoctor/foodogsquared/converters/html5-extended.rb
index 460e480..51b9b02 100644
--- a/lib/asciidoctor/foodogsquared/converters/html5-extended.rb
+++ b/lib/asciidoctor/foodogsquared/converters/html5-extended.rb
@@ -84,6 +84,56 @@ module Asciidoctor::Foodogsquared::Converters
       html.to_html(indent: 2)
     end
 
+    def convert_image(node)
+      html = Nokogiri::HTML5::DocumentFragment.parse <<~HTML
+        <figure>
+          <picture></picture>
+        </figure>
+      HTML
+      figure = html.first_element_child
+      picture = figure.first_element_child
+
+      add_common_attributes node, figure
+      node.attr?('sources') && add_sources_elem(node, picture, 'image')
+
+      target = node.attr 'target'
+      if (node.attr?('format', 'svg') || target.end_with?('.svg'))
+        if node.option? 'inline'
+          reader_opts = {
+            start: node.document.attr('imagesdir'),
+            normalize: true,
+            label: 'SVG',
+            warn_if_empty: true
+          }
+          figure.inner_html = node.read_contents target, reader_opts
+        elsif node.option? 'interactive'
+          picture.unlink
+          html.document.create_element 'object' do |object|
+            node.attr?('fallback') && object.add_child(add_img_elem(node, html))
+
+            add_attributes_from_node node, object, %w[width height]
+            object['type'] = 'image/svg+xml'
+            object['data'] = node.image_uri target
+
+            figure.add_child object
+          end
+        else
+          picture.add_child(add_img_elem(node, html))
+        end
+      else
+        picture.add_child(add_img_elem(node, html))
+      end
+
+      if node.title?
+        html.document.create_element 'figcaption' do |block|
+          block.inner_html = node.captioned_title
+          figure.add_child block
+        end
+      end
+
+      html.to_html(indent: 2)
+    end
+
     # A modified version of the audio node except it can accept multiple
     # sources.
     def convert_audio(node)
@@ -188,9 +238,10 @@ module Asciidoctor::Foodogsquared::Converters
     end
 
     def add_sources_elem(node, html, media_type)
+      src_attr = html.name == 'picture' ? 'srcset' : 'src'
       sources = node.attr('sources', '').split(',').each do |src|
         src = html.document.create_element 'source' do |block|
-          block['src'] = src
+          block[src_attr] = src
 
           type = MIME::Types.type_for(src).find do |mime|
             mime.media_type == media_type
@@ -203,5 +254,13 @@ module Asciidoctor::Foodogsquared::Converters
 
       [html, sources]
     end
+
+    def add_img_elem(node, html)
+      html.document.create_element 'img' do |img|
+        add_attributes_from_node node, img, %w[width height]
+        img['src'] = node.attr 'target'
+        img['alt'] = node.alt
+      end
+    end
   end
 end
diff --git a/spec/html5_extended_converter.rb b/spec/html5_extended_converter.rb
index c4d2174..34aadea 100644
--- a/spec/html5_extended_converter.rb
+++ b/spec/html5_extended_converter.rb
@@ -66,6 +66,144 @@ describe Asciidoctor::Foodogsquared::Converters::HTML5Modified do
     (expect actual).to eq expected.chomp
   end
 
+  it 'should have an image block with multiple <source>' do
+    input = <<~INPUT
+      image::hello.png[sources="hello.avif,hello.webp"]
+    INPUT
+
+    expected = <<~HTML
+      <figure>
+        <picture><source srcset="hello.avif" type="image/avif"><source srcset="hello.webp" type="image/webp"><img src="hello.png" alt="hello"></picture>
+      </figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with interactive SVG images' do
+    input = <<~INPUT
+      image::#{fixtures_file 'hello.svg'}[Interactive, opts=interactive]
+    INPUT
+
+    # rubocop:disable Layout/TrailingWhitespace
+    expected = <<~HTML
+      <figure>
+        
+      <object type="image/svg+xml" data="#{fixtures_file 'hello.svg'}"></object></figure>
+    HTML
+    # rubocop:enable Layout/TrailingWhitespace
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with interactive SVG images with a caption' do
+    input = <<~INPUT
+      :figure-caption!:
+
+      .SVG file
+      image::#{fixtures_file 'hello.svg'}[Interactive, opts=interactive]
+    INPUT
+
+    # rubocop:disable Layout/TrailingWhitespace
+    expected = <<~HTML
+      <figure>
+        
+      <object type="image/svg+xml" data="#{fixtures_file 'hello.svg'}"></object><figcaption>SVG file</figcaption></figure>
+    HTML
+    # rubocop:enable Layout/TrailingWhitespace
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with inline SVG images' do
+    input = <<~INPUT
+      image::#{fixtures_file 'hello.svg'}[Inline, opts=inline]
+    INPUT
+
+    expected = <<~HTML
+      <figure>#{File.read fixtures_file('hello.svg')}
+      </figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with inline SVG image with a caption' do
+    input = <<~INPUT
+      :figure-caption!:
+
+      .Inline SVG file
+      image::#{fixtures_file 'hello.svg'}[Inline, opts=inline]
+    INPUT
+
+    expected = <<~HTML
+      <figure>#{File.read fixtures_file('hello.svg')}<figcaption>Inline SVG file</figcaption></figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with multiple <source> with caption' do
+    input = <<~INPUT
+      :figure-caption!:
+
+      .A figure caption
+      image::hello.png[sources="hello.avif,hello.webp"]
+    INPUT
+
+    expected = <<~HTML
+      <figure>
+        <picture><source srcset="hello.avif" type="image/avif"><source srcset="hello.webp" type="image/webp"><img src="hello.png" alt="hello"></picture>
+      <figcaption>A figure caption</figcaption></figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with multiple <source>, a caption, an ID, and multiple roles' do
+    input = <<~INPUT
+      :figure-caption!:
+
+      [#image-id.whoa.there]
+      .A figure caption
+      image::hello.png[sources="hello.avif,hello.webp"]
+    INPUT
+
+    expected = <<~HTML
+      <figure id="image-id" class="whoa there">
+        <picture><source srcset="hello.avif" type="image/avif"><source srcset="hello.webp" type="image/webp"><img src="hello.png" alt="hello"></picture>
+      <figcaption>A figure caption</figcaption></figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
+  it 'should have an image block with multiple <source>, a caption, an ID, and multiple roles with some attributes' do
+    input = <<~INPUT
+      :figure-caption!:
+
+      [#image-id.whoa.there]
+      .A figure caption
+      image::hello.png[sources="hello.avif,hello.webp", width=300, height=100]
+    INPUT
+
+    expected = <<~HTML
+      <figure id="image-id" class="whoa there">
+        <picture><source srcset="hello.avif" type="image/avif"><source srcset="hello.webp" type="image/webp"><img width="300" height="100" src="hello.png" alt="hello"></picture>
+      <figcaption>A figure caption</figcaption></figure>
+    HTML
+
+    actual = (Asciidoctor.convert input).chomp
+    (expect actual).to eq expected.chomp
+  end
+
   it 'should have a video block with multiple <source>' do
     input = <<~INPUT
       video::hello.mp4[sources="hello.mp4,hello.webm"]