Class: Palmister::VcDiff

Inherits:
Object
  • Object
show all
Defined in:
lib/palmister/vc_diff.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ VcDiff

Returns a new instance of VcDiff.



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# File 'lib/palmister/vc_diff.rb', line 9

def initialize
  @content = ""
  @last_lines = []
  @old_line = 1
  @new_line = 1
end

Instance Attribute Details

#content ⇒ Object

Returns the value of attribute content.



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# File 'lib/palmister/vc_diff.rb', line 3

def content
  @content
end

#last ⇒ Object

Returns the value of attribute last.



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# File 'lib/palmister/vc_diff.rb', line 7

def last
  @last
end

#last_lines ⇒ Object

Returns the value of attribute last_lines.



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# File 'lib/palmister/vc_diff.rb', line 6

def last_lines
  @last_lines
end

#new_line ⇒ Object

Returns the value of attribute new_line.



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# File 'lib/palmister/vc_diff.rb', line 5

def new_line
  @new_line
end

#old_line ⇒ Object

Returns the value of attribute old_line.



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# File 'lib/palmister/vc_diff.rb', line 4

def old_line
  @old_line
end

Instance Method Details

#add_last_lines(n = 3) ⇒ Object 



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# File 'lib/palmister/vc_diff.rb', line 50

def add_last_lines(n = 3)
  @content << %Q|<tr><td colspan="4">Next Change: </td></tr>\n|
  start = @last_lines.length - n
  start = 0 if start < 0
  start.upto @last_lines.length do |i|
    @content << @last_lines[i] if @last_lines[i]
  end
  @last_lines = []
end

#change(event) ⇒ Object 



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# File 'lib/palmister/vc_diff.rb', line 16

def change(event)
  add_last_lines unless @last == :change
  @content << %Q|<tr><td>#{old_line}. </td><td><pre class="only_a">#{event.old_element}</pre></td><td><pre class="only_b">#{event.new_element}</pre></td><td>#{new_line}. </td></tr>\n|

  @last = :change
  @old_line += 1
  @new_line += 1
end

#discard_a(event) ⇒ Object

This will be called when there is a line in A that isn’t in B



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# File 'lib/palmister/vc_diff.rb', line 33

def discard_a(event)
  add_last_lines unless @last == :discard_a
  @content << %Q|<tr><td>#{old_line}. </td><td><pre class="only_a">#{event.old_element}</pre></td><td></td><td></td></tr>\n|

  @last = :discard_a
  @old_line += 1
end

#discard_b(event) ⇒ Object

This will be called when there is a line in B that isn’t in A



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# File 'lib/palmister/vc_diff.rb', line 42

def discard_b(event)
  add_last_lines unless @last == :discard_b
  @content << %Q|<tr><td></td><td></td><td><pre class="only_b">#{event.new_element}</pre></td><td>#{new_line}. </td></tr>\n|

  @last = :discard_b
  @new_line += 1
end

#match(event) ⇒ Object

This will be called with both lines are the same



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# File 'lib/palmister/vc_diff.rb', line 26

def match(event)
  @last_lines.push %Q|<tr><td>#{old_line}. </td><td colspan="2"><pre class="match">#{event.old_element}</pre></td><td>#{new_line}. </td></tr>\n|
  @old_line += 1
  @new_line += 1
end