resolves #951 allow link URL to be hidden or shown using show-link-ur…

…i attribute

CHANGELOG.adoc

@@ -5,6 +5,13 @@
 This document provides a high-level view of the changes to the {project-name} by release.
 For a detailed view of what has changed, refer to the {uri-repo}/commits/v1.6.x[commit history] on GitHub.
 
+== Unreleased
+
+Enhancements::
+
+* show URL of link for any media type when show-link-uri is set (#951)
+* do not show URL of link when media type is screen or prepress when show-link-uri is unset (#951)
+
 == 1.6.1 (2021-09-04) - @mojavelinux
 
 Enhancements::

lib/asciidoctor/pdf/converter.rb

@@ -2357,7 +2357,7 @@ def convert_inline_anchor node
             # QUESTION should we insert breakable chars into URI when building fragment instead?
             %(<a href="#{target}"#{attrs.join}>#{breakable_uri text}</a>)
           # NOTE @media may not be initialized if method is called before convert phase
-          elsif @media != 'screen' || (doc.attr? 'show-link-uri')
+          elsif (doc.attr? 'show-link-uri') || !(@media == 'screen' || (doc.attribute_locked? 'show-link-uri') || ((doc.instance_variable_get :@attributes_modified).include? 'show-link-uri'))
             # QUESTION should we insert breakable chars into URI when building fragment instead?
             # TODO: allow style of printed link to be controlled by theme
             %(<a href="#{target}"#{attrs.join}>#{text}</a> [<font size="0.85em">#{breakable_uri bare_target}</font>&#93;)

spec/link_spec.rb

@@ -82,7 +82,7 @@
       (expect lines[1]).to eql 'https://goo.gl/search/asciidoctor'
     end
 
-    it 'should reveal URL of link when media=print or media=prepress' do
+    it 'should reveal URL of link by default when media=print or media=prepress' do
       %w(print prepress).each do |media|
         pdf = to_pdf <<~'EOS', attribute_overrides: { 'media' => media }, analyze: true
         https://asciidoctor.org[Asciidoctor] is a text processor.
@@ -92,6 +92,38 @@
       end
     end
 
+    it 'should reveal URL of link when show-link-uri is set' do
+      pdf = to_pdf <<~'EOS', analyze: true
+      :show-link-uri:
+
+      https://asciidoctor.org[Asciidoctor] is a text processor.
+      EOS
+
+      (expect pdf.lines).to eql ['Asciidoctor [https://asciidoctor.org] is a text processor.']
+    end
+
+    it 'should not reveal URL of link when show-link-uri is unset in document even media is print or prepress' do
+      %w(print prepress).each do |media|
+        pdf = to_pdf <<~'EOS', attribute_overrides: { 'media' => media }, analyze: true
+        :!show-link-uri:
+
+        https://asciidoctor.org[Asciidoctor] is a text processor.
+        EOS
+
+        (expect pdf.lines).to eql ['Asciidoctor is a text processor.']
+      end
+    end
+
+    it 'should not reveal URL of link when show-link-uri is unset from API even media is print or prepress' do
+      %w(print prepress).each do |media|
+        pdf = to_pdf <<~'EOS', attribute_overrides: { 'media' => media, 'show-link-uri' => nil }, analyze: true
+        https://asciidoctor.org[Asciidoctor] is a text processor.
+        EOS
+
+        (expect pdf.lines).to eql ['Asciidoctor is a text processor.']
+      end
+    end
+
     it 'should split revealed URL on breakable characters when media=print, media=prepress, or show-link-uri is set' do
       inputs = [
         'the URL on this line will get split on the ? char https://github.com/asciidoctor/asciidoctor/issues?|q=milestone%3Av2.0.x[link]',