From d6b081a9d84994be7b838b1b74152bc9e5c712b3 Mon Sep 17 00:00:00 2001
From: Juracy Filho <juracy@gmail.com>
Date: Wed, 26 May 2021 00:40:17 -0300
Subject: [PATCH] resolves #245 adding support for pikchr

---
 README.md                                     |  1 +
 .../extensions/asciidoctor_kroki/extension.rb |  1 +
 ruby/spec/asciidoctor_kroki_spec.rb           |  2 +-
 src/asciidoctor-kroki.js                      |  1 +
 test/test.spec.js                             | 50 +++++++++++++++++++
 5 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 19bc2bea..097613e5 100644
--- a/README.md
+++ b/README.md
@@ -309,6 +309,7 @@ Kroki currently supports the following diagram libraries:
 * [Nomnoml](https://github.com/skanaar/nomnoml): `nomnoml`
 * [NwDiag](https://github.com/blockdiag/nwdiag): `nwdiag`
 * [PacketDiag](https://github.com/blockdiag/nwdiag): `packetdiag`
+* [Pikchr](https://github.com/drhsqlite/pikchr): `pikchr`
 * [PlantUML](https://github.com/plantuml/plantuml): `plantuml`
 * [RackDiag](https://github.com/blockdiag/nwdiag): `rackdiag`
 * [SeqDiag](https://github.com/blockdiag/seqdiag): `seqdiag`
diff --git a/ruby/lib/asciidoctor/extensions/asciidoctor_kroki/extension.rb b/ruby/lib/asciidoctor/extensions/asciidoctor_kroki/extension.rb
index 2f734b07..7a11ee3d 100644
--- a/ruby/lib/asciidoctor/extensions/asciidoctor_kroki/extension.rb
+++ b/ruby/lib/asciidoctor/extensions/asciidoctor_kroki/extension.rb
@@ -117,6 +117,7 @@ module Kroki
       nomnoml
       nwdiag
       packetdiag
+      pikchr
       plantuml
       rackdiag
       seqdiag
diff --git a/ruby/spec/asciidoctor_kroki_spec.rb b/ruby/spec/asciidoctor_kroki_spec.rb
index c8976bf1..ff8f1e0d 100644
--- a/ruby/spec/asciidoctor_kroki_spec.rb
+++ b/ruby/spec/asciidoctor_kroki_spec.rb
@@ -146,7 +146,7 @@
 describe ::AsciidoctorExtensions::Kroki do
   it 'should return the list of supported diagrams' do
     diagram_names = ::AsciidoctorExtensions::Kroki::SUPPORTED_DIAGRAM_NAMES
-    expect(diagram_names).to include('vegalite', 'plantuml', 'bytefield', 'bpmn', 'excalidraw', 'wavedrom')
+    expect(diagram_names).to include('vegalite', 'plantuml', 'bytefield', 'bpmn', 'excalidraw', 'wavedrom', 'pikchr')
   end
   it 'should register the extension for the list of supported diagrams' do
     doc = Asciidoctor::Document.new
diff --git a/src/asciidoctor-kroki.js b/src/asciidoctor-kroki.js
index b22002fa..591847a1 100644
--- a/src/asciidoctor-kroki.js
+++ b/src/asciidoctor-kroki.js
@@ -212,6 +212,7 @@ module.exports.register = function register (registry, context = {}) {
     'nomnoml',
     'nwdiag',
     'packetdiag',
+    'pikchr',
     'plantuml',
     'rackdiag',
     'seqdiag',
diff --git a/test/test.spec.js b/test/test.spec.js
index 31ac2fc6..5c613310 100644
--- a/test/test.spec.js
+++ b/test/test.spec.js
@@ -31,6 +31,7 @@ describe('Registration', () => {
     expect(registry['$registered_for_block_macro?']('rackdiag')).to.be.an('object')
     expect(registry['$registered_for_block_macro?']('wavedrom')).to.be.an('object')
     expect(registry['$registered_for_block_macro?']('excalidraw')).to.be.an('object')
+    expect(registry['$registered_for_block_macro?']('pikchr')).to.be.an('object')
   })
 })
 
@@ -917,6 +918,55 @@ rackdiag {
       expect(html).to.contain('https://kroki.io/bytefield/svg/eNrTSClKLNdNzs8pzc3TzUhNTEktKtbk0gCLJuVXKCg5pqQUpRYXKylUWxUXJOYpmNSiSAdnVqXC5YxQ5AwwhdMTCxSUAhIrc_ITU5QQaktK8nM1AW7MLSU')
       expect(html).to.contain('<div class="imageblock kroki">')
     })
+    it('should convert a Pikchr diagram to an image', () => {
+      const input = `
+[pikchr]
+....
+$r = 0.2in
+linerad = 0.75*$r
+linewid = 0.25
+
+# Start and end blocks
+#
+box "element" bold fit
+line down 50% from last box.sw
+dot rad 250% color black
+X0: last.e + (0.3,0)
+arrow from last dot to X0
+move right 3.9in
+box wid 5% ht 25% fill black
+X9: last.w - (0.3,0)
+arrow from X9 to last box.w
+
+
+# The main rule that goes straight through from start to finish
+#
+box "object-definition" italic fit at 11/16 way between X0 and X9
+arrow to X9
+arrow from X0 to last box.w
+
+# The LABEL: rule
+#
+arrow right $r from X0 then down 1.25*$r then right $r
+oval " LABEL " fit
+arrow 50%
+oval "\\":\\"" fit
+arrow 200%
+box "position" italic fit
+arrow
+line right until even with X9 - ($r,0) \
+  then up until even with X9 then to X9
+arrow from last oval.e right $r*0.5 then up $r*0.8 right $r*0.8
+line up $r*0.45 right $r*0.45 then right
+....
+`
+      const registry = asciidoctor.Extensions.create()
+      asciidoctorKroki.register(registry)
+      const html = asciidoctor.convert(input, { extension_registry: registry })
+      expect(html).to.contain('https://kroki.io/pikchr/svg/eNptUk1T2zAQvetX7Jgww0cxisEUZ6aHdoYbNzjkwEW2lVhF0TLyJqL_vispSV3g4NFo3-rt2_c88_ADZFkZJ6xx2qs-3b_XFzOfKsHkSlULcQJPpDyBcj1o_lqL3esoTkSL71BoqzfaUQEt2h5WhtJ76DE4qOUprDxuwKqRuOG9HIPokSAOrCLaoUXPjKp7FUu5SI2lhks4k-XNN3kulPcYJiTxNSEspdjgToM364Hgpmx4kygn6q5PgWsVHytj7YG82ZMHuPqKfNlE2qPOIOLez4OGjTIO_NZqoEERrFGPMJJXaTANHrfrIVOMySVmWRlnxuFgELa_dUdXvY5lMugKMKSs6aJZwJTz-fX8DoL6A62moLXj7ZLZy2avMC7c_KdWflSbxT7-_PXwuEhyeXx-kC2a-X8vBx6R8plzvpx4rhz6BO6UhSJz8RkjzUwc2B58KRYvxRSqJGNp3TccP22Zm_KPkcdsHRkLesdzg6Eh2s-xzDynApD1bN--6krQJz-SE1FaqY97XMiyPjKl6_0Uu89yDthtPQVv64knfwGrmf6K')
+
+      expect(html).to.contain('<div class="imageblock kroki">')
+    })
     it('should convert a Vega-Lite diagram and resolve data.url relative to the diagram file', async () => {
       const registry = asciidoctor.Extensions.create()
       asciidoctorKroki.register(registry)