[issue #64] Added revisions comparsion.

app/controllers/wiki_controller.rb

@@ -117,6 +117,7 @@ class WikiController < ApplicationController
       @page = @wiki.page(@name)
       diffs = @wiki.repo.diff(@versions.first, @versions.last, @page.path)
       @diff = diffs.first
+      @helper = WikiHelper::CompareHelper.new(@diff, @versions)
       render :compare
     else
       redirect_to project_wiki_path(@project, CGI.escape(@name))
@@ -137,6 +138,7 @@ class WikiController < ApplicationController
       @versions = [sha1, sha2]
       diffs     = @wiki.repo.diff(@versions.first, @versions.last, @page.path)
       @diff     = diffs.first
+      @helper = WikiHelper::CompareHelper.new(@diff, @versions)
       flash[:error]  = t("flash.wiki.patch_does_not_apply")
       render :compare
     end
@@ -158,7 +160,7 @@ class WikiController < ApplicationController
   def history
     @name = params['id']
     if @page = @wiki.page(@name)
-      @versions = @page.versions(:page => params['page'], :per_page => 25)#.paginate :page => params[:page] #try to use will_paginate
+      @versions = @page.versions#(:page => params['page'], :per_page => 25)#.paginate :page => params[:page] #try to use will_paginate
     else
       redirect_to :back
     end

app/helpers/wiki_helper.rb

@@ -1,4 +1,90 @@
 module WikiHelper
+  class CompareHelper
+
+    def initialize(diff, versions)
+      @diff = diff
+      @versions = versions
+    end
+
+    def before
+      @versions[0][0..6]
+    end
+
+    def after
+      @versions[1][0..6]
+    end
+
+    def lines
+      lines = []
+      @diff.diff.split("\n")[2..-1].each do |line|
+        lines << { :line  => line,
+                   :class => line_class(line),
+                   :ldln  => left_diff_line_number(line),
+                   :rdln  => right_diff_line_number(line) }
+      end if @diff
+      lines
+    end
+
+    def show_revert
+      !@message
+    end
+
+    private
+
+      def line_class(line)
+        if line =~ /^@@/
+          'gc'
+        elsif line =~ /^\+/
+          'gi'
+        elsif line =~ /^\-/
+          'gd'
+        else
+          ''
+        end
+      end
+
+      @left_diff_line_number = nil
+      def left_diff_line_number(line)
+        if line =~ /^@@/
+          m, li = *line.match(/\-(\d+)/)
+          @left_diff_line_number = li.to_i
+          @current_line_number = @left_diff_line_number
+          ret = '...'
+        elsif line[0] == ?-
+          ret = @left_diff_line_number.to_s
+          @left_diff_line_number += 1
+          @current_line_number = @left_diff_line_number - 1
+        elsif line[0] == ?+
+          ret = ' '
+        else
+          ret = @left_diff_line_number.to_s
+          @left_diff_line_number += 1
+          @current_line_number = @left_diff_line_number - 1
+        end
+        ret
+      end
+
+      @right_diff_line_number = nil
+      def right_diff_line_number(line)
+        if line =~ /^@@/
+          m, ri = *line.match(/\+(\d+)/)
+          @right_diff_line_number = ri.to_i
+          @current_line_number = @right_diff_line_number
+          ret = '...'
+        elsif line[0] == ?-
+          ret = ' '
+        elsif line[0] == ?+
+          ret = @right_diff_line_number.to_s
+          @right_diff_line_number += 1
+          @current_line_number = @right_diff_line_number - 1
+        else
+          ret = @right_diff_line_number.to_s
+          @right_diff_line_number += 1
+          @current_line_number = @right_diff_line_number - 1
+        end
+        ret
+      end
+  end
 
   def gravatar_url(email)
     "http://www.gravatar.com/avatar/#{Digest::MD5.hexdigest(email.downcase)}?s=16&r=pg"

app/views/wiki/_compare.html.haml

@@ -0,0 +1,24 @@
+#compare-content
+  - if action_name != 'revert'
+    %ul.actions
+      %li.minibutton
+        = form_tag revert_page_project_wiki_path(@project, escaped_name, @helper.before, @helper.after),
+            :name => "gollum-revert", :id => "gollum-revert-form" do
+          = link_to t("layout.wiki.revert_changes"), '#', :class => "gollum-revert-button"
+
+  .data.highlight
+    %table{:cellpadding => "0", :cellspacing => "0"}
+      - @helper.lines.each do |line|
+        %tr
+          %td.line_numbers= line[:ldln]
+          %td.line_numbers= line[:rdln]
+          %td
+            %pre
+              %div{:class => line[:class]}= line[:line]
+
+#gollum-footer
+  %ul.actions
+    - if action_name != 'revert'
+      %li.minibutton
+        = link_to t("layout.wiki.revert_changes"), '#', :class => "gollum-revert-button"
+    %li.minibutton= link_to t("layout.wiki.back_to_top"), '#wiki'

app/views/wiki/compare.html.haml

@@ -0,0 +1,29 @@
+= render :partial => 'gollum_includes'
+= render :partial => 'project_short'
+
+%a{ :name => "wiki"}
+.block
+  .secondary-navigation
+    %ul.wat-cf
+      %li.first= link_to t("layout.wiki.home"), project_wiki_index_path(@project)
+      %li= link_to t("layout.wiki.pages"), pages_project_wiki_index_path(@project)
+      %li= link_to t("layout.wiki.wiki_history"), '#'
+      %li= link_to t("layout.wiki.git_access"), '#'
+
+  .content
+    #wiki-wrapper.inner.compare
+      #head
+        %h1
+          = t("layout.wiki.history_for")
+          %strong= @name
+
+        %ul.actions
+          %li.minibutton= link_to t("layout.wiki.back_to_history"), history_project_wiki_path(@project, escaped_name)
+        = render :partial => 'searchbar'
+
+      #wiki-content
+        = render :partial => "compare"
+
+- content_for :sidebar do
+  - render :partial => 'projects/sidebar'
+

config/locales/ru.yml

@@ -187,6 +187,9 @@ ru:
       no_pages_in: В %{ref} нет страниц для отображения.
       no_results_for_search: По запросу %{query} ничего не найдено.
       matches: Совпадений
+      back_to_history: Назад к истории
+      history_for: История для
+      revert_changes: Откатить изменения
 
     roles:
       confirm_delete: Вы уверены, что хотите удалить эту роль?

config/routes.rb

@@ -91,7 +91,7 @@ Rosa::Application.routes.draw do
       member do
         get :history
         get :edit
-        match 'revert/:sha1/:sha2' => 'wiki#revert', :as => :revert_page, :via => :get
+        match 'revert/:sha1/:sha2' => 'wiki#revert', :as => :revert_page, :via => [:get, :post]
         match ':ref' => 'wiki#show', :as => :versioned, :via => :get
 
         post :compare

public/stylesheets/gollum/gollum.css

@@ -274,6 +274,7 @@
   #wiki-history table tr td.checkbox {
     min-width: 2em;
     padding: 0.3em;
+    width: 24px;
   }
   
   #wiki-history table tr td.checkbox input {
@@ -415,9 +416,14 @@
   .compare .data {
     border: 1px solid #ddd;
     margin-top: 1em;
+    margin-bottom: 1em;
     overflow: auto;
   }
 
+  .compare .data table {
+    width: 100%;
+  }
+  
   .compare .data pre {
     margin: 0;
     padding: 0;
@@ -440,6 +446,7 @@
     border-right: 1px solid #999;
     color: #999; 
     padding: 0 0 0 0.5em;
+    width: 1%;
   }
 
 .compare #compare-content ul.actions li,