Makes wiki text formatter pluggable.

Original patch #2025 by Yuki Sonoda slightly edited.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@1955 e93f8b46-1217-0410-a6f0-8f06a7374b81

4 files changed, 277 insertions, 152 deletions

diff --git a/lib/redmine/plugin.rb b/lib/redmine/plugin.rb
index 8123003cc..87a6ce4d3 100644
--- a/lib/redmine/plugin.rb
+++ b/lib/redmine/plugin.rb
@@ -148,6 +148,16 @@ module Redmine #:nodoc:
     def activity_provider(*args)
       Redmine::Activity.register(*args)
     end
+    
+    # Registers a wiki formatter.
+    #
+    # Parameters:
+    # * +name+ - human-readable name
+    # * +formatter+ - formatter class, which should have an instance method +to_html+
+    # * +helper+ - helper module, which will be included by wiki pages
+    def wiki_format_provider(name, formatter, helper)
+      Redmine::WikiFormatting.register(name, formatter, helper)
+    end
 
     # Returns +true+ if the plugin can be configured.
     def configurable?
diff --git a/lib/redmine/wiki_formatting.rb b/lib/redmine/wiki_formatting.rb
index 7dffff492..1525dbc19 100644
--- a/lib/redmine/wiki_formatting.rb
+++ b/lib/redmine/wiki_formatting.rb
@@ -1,5 +1,5 @@
-# redMine - project management software
-# Copyright (C) 2006-2007  Jean-Philippe Lang
+# Redmine - project management software
+# Copyright (C) 2006-2008  Jean-Philippe Lang
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -15,176 +15,65 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
-require 'redcloth3'
-require 'coderay'
-
 module Redmine
   module WikiFormatting
-  
-  private
-  
-    class TextileFormatter < RedCloth3
-      
-      # auto_link rule after textile rules so that it doesn't break !image_url! tags
-      RULES = [:textile, :block_markdown_rule, :inline_auto_link, :inline_auto_mailto, :inline_toc, :inline_macros]
+    @@formatters = {}
+
+    class << self
+      def map
+        yield self
+      end
       
-      def initialize(*args)
-        super
-        self.hard_breaks=true
-        self.no_span_caps=true
+      def register(name, formatter, helper)
+        raise ArgumentError, "format name '#{name}' is already taken" if @@formatters[name]
+        @@formatters[name.to_sym] = {:formatter => formatter, :helper => helper}
       end
       
-      def to_html(*rules, &block)
-        @toc = []
-        @macros_runner = block
-        super(*RULES).to_s
+      def formatter_for(name)
+        entry = @@formatters[name.to_sym]
+        (entry && entry[:formatter]) || Redmine::WikiFormatting::NullFormatter::Formatter
       end
-
-    private
-
-      # Patch for RedCloth.  Fixed in RedCloth r128 but _why hasn't released it yet.
-      # <a href="http://code.whytheluckystiff.net/redcloth/changeset/128">http://code.whytheluckystiff.net/redcloth/changeset/128</a>
-      def hard_break( text ) 
-        text.gsub!( /(.)\n(?!\n|\Z|>| *(>? *[#*=]+(\s|$)|[{|]))/, "\\1<br />\n" ) if hard_breaks 
+      
+      def helper_for(name)
+        entry = @@formatters[name.to_sym]
+        (entry && entry[:helper]) || Redmine::WikiFormatting::NullFormatter::Helper
       end
       
-      # Patch to add code highlighting support to RedCloth
-      def smooth_offtags( text )
-        unless @pre_list.empty?
-          ## replace <pre> content
-          text.gsub!(/<redpre#(\d+)>/) do
-            content = @pre_list[$1.to_i]
-            if content.match(/<code\s+class="(\w+)">\s?(.+)/m)
-              content = "<code class=\"#{$1} CodeRay\">" + 
-                CodeRay.scan($2, $1.downcase).html(:escape => false, :line_numbers => :inline)
-            end
-            content
-          end
-        end
+      def format_names
+        @@formatters.keys.map
       end
       
-      # Patch to add 'table of content' support to RedCloth
-      def textile_p_withtoc(tag, atts, cite, content)
-        # removes wiki links from the item
-        toc_item = content.gsub(/(\[\[|\]\])/, '')
-        # removes styles
-        # eg. %{color:red}Triggers% => Triggers
-        toc_item.gsub! %r[%\{[^\}]*\}([^%]+)%], '\\1'
+      def to_html(format, text, options = {}, &block)
+        formatter_for(format).new(text).to_html(&block)
+      end
+    end
+    
+    # Default formatter module
+    module NullFormatter
+      class Formatter
+        include ActionView::Helpers::TagHelper
+        include ActionView::Helpers::TextHelper
         
-        # replaces non word caracters by dashes
-        anchor = toc_item.gsub(%r{[^\w\s\-]}, '').gsub(%r{\s+(\-+\s*)?}, '-')
-
-        unless anchor.blank?
-          if tag =~ /^h(\d)$/
-            @toc << [$1.to_i, anchor, toc_item]
-          end
-          atts << " id=\"#{anchor}\""
-          content = content + "<a href=\"##{anchor}\" class=\"wiki-anchor\">&para;</a>"
+        def initialize(text)
+          @text = text
         end
-        textile_p(tag, atts, cite, content)
-      end
-
-      alias :textile_h1 :textile_p_withtoc
-      alias :textile_h2 :textile_p_withtoc
-      alias :textile_h3 :textile_p_withtoc
-      
-      def inline_toc(text)
-        text.gsub!(/<p>\{\{([<>]?)toc\}\}<\/p>/i) do
-          div_class = 'toc'
-          div_class << ' right' if $1 == '>'
-          div_class << ' left' if $1 == '<'
-          out = "<ul class=\"#{div_class}\">"
-          @toc.each do |heading|
-            level, anchor, toc_item = heading
-            out << "<li class=\"heading#{level}\"><a href=\"##{anchor}\">#{toc_item}</a></li>\n"
-          end
-          out << '</ul>'
-          out
+        
+        def to_html(*args)
+          simple_format(auto_link(CGI::escapeHTML(@text)))
         end
       end
       
-      MACROS_RE = /
-                    (!)?                        # escaping
-                    (
-                    \{\{                        # opening tag
-                    ([\w]+)                     # macro name
-                    (\(([^\}]*)\))?             # optional arguments
-                    \}\}                        # closing tag
-                    )
-                  /x unless const_defined?(:MACROS_RE)
-      
-      def inline_macros(text)
-        text.gsub!(MACROS_RE) do
-          esc, all, macro = $1, $2, $3.downcase
-          args = ($5 || '').split(',').each(&:strip)
-          if esc.nil?
-            begin
-              @macros_runner.call(macro, args)
-            rescue => e
-              "<div class=\"flash error\">Error executing the <strong>#{macro}</strong> macro (#{e})</div>"
-            end || all
-          else
-            all
-          end
+      module Helper
+        def wikitoolbar_for(field_id)
         end
-      end
       
-      AUTO_LINK_RE = %r{
-                        (                          # leading text
-                          <\w+.*?>|                # leading HTML tag, or
-                          [^=<>!:'"/]|             # leading punctuation, or 
-                          ^                        # beginning of line
-                        )
-                        (
-                          (?:https?://)|           # protocol spec, or
-                          (?:ftp://)|
-                          (?:www\.)                # www.*
-                        )
-                        (
-                          (\S+?)                   # url
-                          (\/)?                    # slash
-                        )
-                        ([^\w\=\/;\(\)]*?)               # post
-                        (?=<|\s|$)
-                       }x unless const_defined?(:AUTO_LINK_RE)
-
-      # Turns all urls into clickable links (code from Rails).
-      def inline_auto_link(text)
-        text.gsub!(AUTO_LINK_RE) do
-          all, leading, proto, url, post = $&, $1, $2, $3, $6
-          if leading =~ /<a\s/i || leading =~ /![<>=]?/
-            # don't replace URL's that are already linked
-            # and URL's prefixed with ! !> !< != (textile images)
-            all
-          else
-            # Idea below : an URL with unbalanced parethesis and
-            # ending by ')' is put into external parenthesis
-            if ( url[-1]==?) and ((url.count("(") - url.count(")")) < 0 ) )
-              url=url[0..-2] # discard closing parenth from url
-              post = ")"+post # add closing parenth to post
-            end
-            %(#{leading}<a class="external" href="#{proto=="www."?"http://www.":proto}#{url}">#{proto + url}</a>#{post})
-          end
+        def heads_for_wiki_formatter
         end
-      end
-
-      # Turns all email addresses into clickable links (code from Rails).
-      def inline_auto_mailto(text)
-        text.gsub!(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
-          mail = $1
-          if text.match(/<a\b[^>]*>(.*)(#{Regexp.escape(mail)})(.*)<\/a>/)
-            mail
-          else
-            %{<a href="mailto:#{mail}" class="email">#{mail}</a>}
-          end
+      
+        def initial_page_content(page)
+          page.pretty_title.to_s
         end
       end
     end
-    
-  public
-  
-    def self.to_html(text, options = {}, &block)
-      TextileFormatter.new(text).to_html(&block)
-    end
   end
 end
diff --git a/lib/redmine/wiki_formatting/textile/formatter.rb b/lib/redmine/wiki_formatting/textile/formatter.rb
new file mode 100644
index 000000000..c936803d5
--- /dev/null
+++ b/lib/redmine/wiki_formatting/textile/formatter.rb
@@ -0,0 +1,183 @@
+# Redmine - project management software
+# Copyright (C) 2006-2008  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require 'redcloth3'
+require 'coderay'
+
+module Redmine
+  module WikiFormatting
+    module Textile
+      class Formatter < RedCloth3
+        
+        # auto_link rule after textile rules so that it doesn't break !image_url! tags
+        RULES = [:textile, :block_markdown_rule, :inline_auto_link, :inline_auto_mailto, :inline_toc, :inline_macros]
+        
+        def initialize(*args)
+          super
+          self.hard_breaks=true
+          self.no_span_caps=true
+        end
+        
+        def to_html(*rules, &block)
+          @toc = []
+          @macros_runner = block
+          super(*RULES).to_s
+        end
+  
+      private
+  
+        # Patch for RedCloth.  Fixed in RedCloth r128 but _why hasn't released it yet.
+        # <a href="http://code.whytheluckystiff.net/redcloth/changeset/128">http://code.whytheluckystiff.net/redcloth/changeset/128</a>
+        def hard_break( text ) 
+          text.gsub!( /(.)\n(?!\n|\Z|>| *(>? *[#*=]+(\s|$)|[{|]))/, "\\1<br />\n" ) if hard_breaks 
+        end
+        
+        # Patch to add code highlighting support to RedCloth
+        def smooth_offtags( text )
+          unless @pre_list.empty?
+            ## replace <pre> content
+            text.gsub!(/<redpre#(\d+)>/) do
+              content = @pre_list[$1.to_i]
+              if content.match(/<code\s+class="(\w+)">\s?(.+)/m)
+                content = "<code class=\"#{$1} CodeRay\">" + 
+                  CodeRay.scan($2, $1.downcase).html(:escape => false, :line_numbers => :inline)
+              end
+              content
+            end
+          end
+        end
+        
+        # Patch to add 'table of content' support to RedCloth
+        def textile_p_withtoc(tag, atts, cite, content)
+          # removes wiki links from the item
+          toc_item = content.gsub(/(\[\[|\]\])/, '')
+          # removes styles
+          # eg. %{color:red}Triggers% => Triggers
+          toc_item.gsub! %r[%\{[^\}]*\}([^%]+)%], '\\1'
+          
+          # replaces non word caracters by dashes
+          anchor = toc_item.gsub(%r{[^\w\s\-]}, '').gsub(%r{\s+(\-+\s*)?}, '-')
+  
+          unless anchor.blank?
+            if tag =~ /^h(\d)$/
+              @toc << [$1.to_i, anchor, toc_item]
+            end
+            atts << " id=\"#{anchor}\""
+            content = content + "<a href=\"##{anchor}\" class=\"wiki-anchor\">&para;</a>"
+          end
+          textile_p(tag, atts, cite, content)
+        end
+  
+        alias :textile_h1 :textile_p_withtoc
+        alias :textile_h2 :textile_p_withtoc
+        alias :textile_h3 :textile_p_withtoc
+        
+        def inline_toc(text)
+          text.gsub!(/<p>\{\{([<>]?)toc\}\}<\/p>/i) do
+            div_class = 'toc'
+            div_class << ' right' if $1 == '>'
+            div_class << ' left' if $1 == '<'
+            out = "<ul class=\"#{div_class}\">"
+            @toc.each do |heading|
+              level, anchor, toc_item = heading
+              out << "<li class=\"heading#{level}\"><a href=\"##{anchor}\">#{toc_item}</a></li>\n"
+            end
+            out << '</ul>'
+            out
+          end
+        end
+        
+        MACROS_RE = /
+                      (!)?                        # escaping
+                      (
+                      \{\{                        # opening tag
+                      ([\w]+)                     # macro name
+                      (\(([^\}]*)\))?             # optional arguments
+                      \}\}                        # closing tag
+                      )
+                    /x unless const_defined?(:MACROS_RE)
+        
+        def inline_macros(text)
+          text.gsub!(MACROS_RE) do
+            esc, all, macro = $1, $2, $3.downcase
+            args = ($5 || '').split(',').each(&:strip)
+            if esc.nil?
+              begin
+                @macros_runner.call(macro, args)
+              rescue => e
+                "<div class=\"flash error\">Error executing the <strong>#{macro}</strong> macro (#{e})</div>"
+              end || all
+            else
+              all
+            end
+          end
+        end
+        
+        AUTO_LINK_RE = %r{
+                        (                          # leading text
+                          <\w+.*?>|                # leading HTML tag, or
+                          [^=<>!:'"/]|             # leading punctuation, or 
+                          ^                        # beginning of line
+                        )
+                        (
+                          (?:https?://)|           # protocol spec, or
+                          (?:ftp://)|
+                          (?:www\.)                # www.*
+                        )
+                        (
+                          (\S+?)                   # url
+                          (\/)?                    # slash
+                        )
+                        ([^\w\=\/;\(\)]*?)               # post
+                        (?=<|\s|$)
+                       }x unless const_defined?(:AUTO_LINK_RE)
+  
+        # Turns all urls into clickable links (code from Rails).
+        def inline_auto_link(text)
+          text.gsub!(AUTO_LINK_RE) do
+            all, leading, proto, url, post = $&, $1, $2, $3, $6
+            if leading =~ /<a\s/i || leading =~ /![<>=]?/
+              # don't replace URL's that are already linked
+              # and URL's prefixed with ! !> !< != (textile images)
+              all
+            else
+              # Idea below : an URL with unbalanced parethesis and
+              # ending by ')' is put into external parenthesis
+              if ( url[-1]==?) and ((url.count("(") - url.count(")")) < 0 ) )
+                url=url[0..-2] # discard closing parenth from url
+                post = ")"+post # add closing parenth to post
+              end
+              %(#{leading}<a class="external" href="#{proto=="www."?"http://www.":proto}#{url}">#{proto + url}</a>#{post})
+            end
+          end
+        end
+  
+        # Turns all email addresses into clickable links (code from Rails).
+        def inline_auto_mailto(text)
+          text.gsub!(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
+            mail = $1
+            if text.match(/<a\b[^>]*>(.*)(#{Regexp.escape(mail)})(.*)<\/a>/)
+              mail
+            else
+              %{<a href="mailto:#{mail}" class="email">#{mail}</a>}
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/redmine/wiki_formatting/textile/helper.rb b/lib/redmine/wiki_formatting/textile/helper.rb
new file mode 100644
index 000000000..af021f990
--- /dev/null
+++ b/lib/redmine/wiki_formatting/textile/helper.rb
@@ -0,0 +1,43 @@
+# Redmine - project management software
+# Copyright (C) 2006-2008  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+module Redmine
+  module WikiFormatting
+    module Textile
+      module Helper
+        def wikitoolbar_for(field_id)
+          help_link = l(:setting_text_formatting) + ': ' +
+            link_to(l(:label_help), compute_public_path('wiki_syntax', 'help', 'html'),
+                    :onclick => "window.open(\"#{ compute_public_path('wiki_syntax', 'help', 'html') }\", \"\", \"resizable=yes, location=no, width=300, height=640, menubar=no, status=no, scrollbars=yes\"); return false;")
+      
+          javascript_include_tag('jstoolbar/jstoolbar') +
+            javascript_include_tag('jstoolbar/textile') +
+            javascript_include_tag("jstoolbar/lang/jstoolbar-#{current_language}") +
+          javascript_tag("var toolbar = new jsToolBar($('#{field_id}')); toolbar.setHelpLink('#{help_link}'); toolbar.draw();")
+        end
+      
+        def initial_page_content(page)
+          "h1. #{@page.pretty_title}"
+        end
+      
+        def heads_for_wiki_formatter
+          stylesheet_link_tag 'jstoolbar'
+        end
+      end
+    end
+  end
+end