resolves asciidoctor#451 allow button to be styled by theme

CHANGELOG.adoc

@@ -29,6 +29,7 @@ For a detailed view of what has changed, refer to the {uri-repo}/commits/master[
 * replace hyphens with underscores in top-level theme keys
 * allow hyphens to be used in variable references in theme (#1122)
 * allow theme to control background and border of inline code (literal) (#306)
+* allow theme to control background and border of inline button (#451)
 * resolve null color value in theme to nil (aka not set)
 * add support for cgi-style options on source language when syntax highlighting with Rouge (#1102)
 * apply custom theme to chronicles example to customize running content and demonstrate how to extend default theme

data/themes/base-theme.yml

@@ -21,6 +21,9 @@ base_line_height: 1.15
 base_line_height_length: 13.8
 base_border_color: 'EEEEEE'
 base_border_width: 0.5
+button_content: '[%s]'
+button_font_family: Courier
+button_font_style: bold
 link_font_color: '0000EE'
 literal_font_family: Courier
 heading_font_style: bold

data/themes/default-theme.yml

@@ -67,6 +67,10 @@ vertical_rhythm: $base_line_height_length
 horizontal_rhythm: $base_line_height_length
 # QUESTION should vertical_spacing be block_spacing instead?
 vertical_spacing: $vertical_rhythm
+button:
+  content: "[\u2009%s\u2009]"
+  font_style: bold
+  font_color: b12146
 link:
   font_color: 428bca
 # literal is currently used for inline monospaced in prose and table cells

lib/asciidoctor-pdf/converter.rb

@@ -2202,8 +2202,7 @@ def convert_inline_break node
   end
 
   def convert_inline_button node
-    %(<strong>[#{NarrowNoBreakSpace}#{node.text}#{NarrowNoBreakSpace}]</strong>)
-    #%(<strong>[#{NoBreakSpace}#{node.text}#{NoBreakSpace}]</strong>)
+    %(<button>#{(@theme.button_content || '%s').sub '%s', node.text}</button>)
   end
 
   def convert_inline_callout node

lib/asciidoctor-pdf/formatted_text/parser.rb

@@ -356,44 +356,44 @@ def _nt_tag_name
       r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
       r0 = r1
     else
-      if (match_len = has_terminal?('code', false, index))
+      if (match_len = has_terminal?('strong', false, index))
         r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
         @index += match_len
       else
-        terminal_parse_failure('code')
+        terminal_parse_failure('strong')
         r2 = nil
       end
       if r2
         r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
         r0 = r2
       else
-        if (match_len = has_terminal?('color', false, index))
+        if (match_len = has_terminal?('em', false, index))
           r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
           @index += match_len
         else
-          terminal_parse_failure('color')
+          terminal_parse_failure('em')
           r3 = nil
         end
         if r3
           r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
           r0 = r3
         else
-          if (match_len = has_terminal?('del', false, index))
+          if (match_len = has_terminal?('code', false, index))
             r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
             @index += match_len
           else
-            terminal_parse_failure('del')
+            terminal_parse_failure('code')
             r4 = nil
           end
           if r4
             r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
             r0 = r4
           else
-            if (match_len = has_terminal?('em', false, index))
+            if (match_len = has_terminal?('color', false, index))
               r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
               @index += match_len
             else
-              terminal_parse_failure('em')
+              terminal_parse_failure('color')
               r5 = nil
             end
             if r5
@@ -422,11 +422,11 @@ def _nt_tag_name
                   r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
                   r0 = r7
                 else
-                  if (match_len = has_terminal?('strong', false, index))
+                  if (match_len = has_terminal?('button', false, index))
                     r8 = instantiate_node(SyntaxNode,input, index...(index + match_len))
                     @index += match_len
                   else
-                    terminal_parse_failure('strong')
+                    terminal_parse_failure('button')
                     r8 = nil
                   end
                   if r8
@@ -455,8 +455,20 @@ def _nt_tag_name
                         r10 = SyntaxNode.new(input, (index-1)...index) if r10 == true
                         r0 = r10
                       else
-                        @index = i0
-                        r0 = nil
+                        if (match_len = has_terminal?('del', false, index))
+                          r11 = instantiate_node(SyntaxNode,input, index...(index + match_len))
+                          @index += match_len
+                        else
+                          terminal_parse_failure('del')
+                          r11 = nil
+                        end
+                        if r11
+                          r11 = SyntaxNode.new(input, (index-1)...index) if r11 == true
+                          r0 = r11
+                        else
+                          @index = i0
+                          r0 = nil
+                        end
                       end
                     end
                   end

lib/asciidoctor-pdf/formatted_text/parser.treetop

@@ -51,7 +51,7 @@ grammar Markup
     # QUESTION faster to do regex?
     # QUESTION can we cut stuff we aren't using? what about supporting hr?
     #'a' / 'b' / 'code' / 'color' / 'del' / 'em' / 'font' / 'i' / 'img' / 'link' / 'span' / 'strikethrough' / 'strong' / 'sub' / 'sup' / 'u'
-    'a' / 'code' / 'color' / 'del' / 'em' / 'font' / 'span' / 'strong' / 'sub' / 'sup'
+    'a' / 'strong' / 'em' / 'code' / 'color' / 'font' / 'span' / 'button' / 'sub' / 'sup' / 'del'
   end
 
   rule void_tag_name

lib/asciidoctor-pdf/formatted_text/transform.rb

@@ -20,27 +20,44 @@ def initialize(options = {})
     @merge_adjacent_text_nodes = options[:merge_adjacent_text_nodes]
     # TODO add support for character spacing
     if (theme = options[:theme])
-      @link_font_settings = {
-        color: theme.link_font_color,
-        font: theme.link_font_family,
-        size: theme.link_font_size,
-        styles: to_styles(theme.link_font_style, theme.link_text_decoration)
-      }.compact
-      @monospaced_font_settings = {
-        color: theme.literal_font_color,
-        font: theme.literal_font_family,
-        size: theme.literal_font_size,
-        styles: to_styles(theme.literal_font_style),
-        background_color: (monospaced_bg_color = theme.literal_background_color),
-        border_width: (monospaced_border_width = theme.literal_border_width),
-        border_color: monospaced_border_width && (theme.literal_border_color || theme.base_border_color),
-        border_offset: (monospaced_bg_or_border = monospaced_bg_color || monospaced_border_width) && theme.literal_border_offset,
-        border_radius: monospaced_bg_or_border && theme.literal_border_radius,
-        callback: monospaced_bg_or_border && [TextBackgroundAndBorderRenderer],
-      }.compact
+      @theme_settings = {
+        button: {
+          color: theme.button_font_color,
+          font: theme.button_font_family,
+          size: theme.button_font_size,
+          styles: to_styles(theme.button_font_style),
+          background_color: (button_bg_color = theme.button_background_color),
+          border_width: (button_border_width = theme.button_border_width),
+          border_color: button_border_width && (theme.button_border_color || theme.base_border_color),
+          border_offset: (button_bg_or_border = button_bg_color || button_border_width) && theme.button_border_offset,
+          border_radius: button_bg_or_border && theme.button_border_radius,
+          callback: button_bg_or_border && [TextBackgroundAndBorderRenderer],
+        }.compact,
+        code: {
+          color: theme.literal_font_color,
+          font: theme.literal_font_family,
+          size: theme.literal_font_size,
+          styles: to_styles(theme.literal_font_style),
+          background_color: (monospaced_bg_color = theme.literal_background_color),
+          border_width: (monospaced_border_width = theme.literal_border_width),
+          border_color: monospaced_border_width && (theme.literal_border_color || theme.base_border_color),
+          border_offset: (monospaced_bg_or_border = monospaced_bg_color || monospaced_border_width) && theme.literal_border_offset,
+          border_radius: monospaced_bg_or_border && theme.literal_border_radius,
+          callback: monospaced_bg_or_border && [TextBackgroundAndBorderRenderer],
+        }.compact,
+        link: {
+          color: theme.link_font_color,
+          font: theme.link_font_family,
+          size: theme.link_font_size,
+          styles: to_styles(theme.link_font_style, theme.link_text_decoration)
+        }.compact,
+      }
     else
-      @link_font_settings = { color: '0000FF' }
-      @monospaced_font_settings = { font: 'Courier', size: 0.9 }
+      @theme_settings = {
+        button: { font: 'Courier', styles: [:bold].to_set },
+        code: { font: 'Courier', size: 0.9 },
+        link: { color: '0000FF' },
+      }
     end
   end
 
@@ -129,9 +146,9 @@ def build_fragment(fragment, tag_name, attrs = {})
       styles << :bold
     when :em
       styles << :italic
-    when :code
+    when :code, :button
       # NOTE prefer old value, except for styles and callback, which should be combined
-      fragment.update(@monospaced_font_settings) {|k, oval, nval| k == :styles ? oval.merge(nval) : (k == :callback ? oval.union(nval) : oval) }
+      fragment.update(@theme_settings[tag_name]) {|k, oval, nval| k == :styles ? oval.merge(nval) : (k == :callback ? oval.union(nval) : oval) }
     when :color
       if !fragment[:color]
         if (rgb = attrs[:rgb])
@@ -202,7 +219,7 @@ def build_fragment(fragment, tag_name, attrs = {})
         end
       end
       # NOTE prefer old value, except for styles, which should be combined
-      fragment.update(@link_font_settings) {|k, old_v, new_v| k == :styles ? old_v.merge(new_v) : old_v } if visible
+      fragment.update(@theme_settings[:link]) {|k, oval, nval| k == :styles ? oval.merge(nval) : oval } if visible
     when :sub
       styles << :subscript
     when :sup

spec/text_formatter_spec.rb

@@ -101,7 +101,7 @@
       (expect text[0][:y]).to be > text[1][:y]
     end
 
-    it 'should add background and border to monospaced text defined in theme', integration: true do
+    it 'should add background and border to code as defined in theme', integration: true do
       theme_overrides = {
         literal_background_color: 'f5f5f5',
         literal_border_color: 'dddddd',
@@ -112,5 +112,17 @@
       to_file = to_pdf_file 'All your `code` belongs to us.', 'text-formatter-code.pdf', pdf_theme: theme_overrides, analyze: true
       (expect to_file).to visually_match 'text-formatter-code.pdf'
     end
+
+    it 'should add background and border to button as defined in theme', integration: true do
+      theme_overrides = {
+        button_content: '%s',
+        button_background_color: '007BFF',
+        button_border_offset: 1.5,
+        button_border_radius: 2.5,
+        button_font_color: 'ffffff',
+      }
+      to_file = to_pdf_file 'Click btn:[Save] to save your work.', 'text-formatter-button.pdf', pdf_theme: theme_overrides, attribute_overrides: { 'experimental' => '' }, analyze: true
+      (expect to_file).to visually_match 'text-formatter-button.pdf'
+    end
   end
 end