Class: GitSpelunk::UI::PagerWindow

Inherits:
Object
  • Object
show all
Defined in:
lib/git_spelunk/ui/pager.rb

Constant Summary collapse

ACTIVE_SHA_COLOR = 
["#00ff00", "#000000"]
FOUND_COLOR = 
:reverse
CURRENT_COLOR = 
["#000000", "#00ff00"]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(height) ⇒ PagerWindow

Returns a new instance of PagerWindow.



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# File 'lib/git_spelunk/ui/pager.rb', line 9

def initialize(height)
  @height = height
  @cursor = 1
  @top = 1
  @highlight_sha = true
end

Instance Attribute Details

#cursor ⇒ Object (readonly)

Returns the value of attribute cursor.



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# File 'lib/git_spelunk/ui/pager.rb', line 17

def cursor
  @cursor
end

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/git_spelunk/ui/pager.rb', line 16

def data
  @data
end

#highlight_sha ⇒ Object

Returns the value of attribute highlight_sha.



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# File 'lib/git_spelunk/ui/pager.rb', line 16

def highlight_sha
  @highlight_sha
end

#search_term ⇒ Object

Returns the value of attribute search_term.



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# File 'lib/git_spelunk/ui/pager.rb', line 16

def search_term
  @search_term
end

#top ⇒ Object

Returns the value of attribute top.



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# File 'lib/git_spelunk/ui/pager.rb', line 17

def top
  @top
end

Instance Method Details

#adjust_top! ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 158

def adjust_top!
  if @top < 1
    @top = 1
  end

  if @top > @cursor
    @top = @cursor
  end

  while @cursor > bufbottom
    @top += 1
  end
end

#blame_line ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 19

def blame_line
  @data[@cursor - 1]
end

#bufbottom ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 98

def bufbottom
  @top + (@height - 1)
end

#cursordown ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 108

def cursordown
  return if @cursor >= data.size
  @cursor += 1
  adjust_top!
end

#cursorup ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 102

def cursorup
  return if @cursor == 1
  @cursor -= 1
  adjust_top!
end

#draw ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 23

def draw
  styles = Dispel::StyleMap.new(@height)

  line_number_width = (data.size + 1).to_s.size

  active_sha = blame_line.sha

  view = Array.new(@height)

  data[@top - 1, @height].each_with_index do |b, i|
    line = ""
    sha, content = b.sha, b.content

    line_number = i + @top

    if sha == active_sha && highlight_sha
      styles.add(ACTIVE_SHA_COLOR, i, 0...999)
    end

    sha_abbrev = sha[0..5]
    if @cursor == line_number
      styles.add(CURRENT_COLOR, i, 0..(sha_abbrev.size - 1))
    end

    line << sha_abbrev

    line << " %*s " % [line_number_width, line_number]
    line << content.gsub(/\r/, '')


    content_start = (sha_abbrev.size + line_number_width + 2)

    if @search_term
      Dispel::Tools.indexes(content, @search_term).each do |found|
        found = content_start + found
        styles.add(FOUND_COLOR, i, found...(found + @search_term.size))
      end
    end
    view[i] = line
  end
  [view, styles]
end

#find_next_index(term, start, reverse) ⇒ Object

returns position in data set, not cursor position



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# File 'lib/git_spelunk/ui/pager.rb', line 69

def find_next_index(term, start, reverse)
  i = start
  while i < data.size && i >= 0
    if data[i].content =~ /#{term}/
      return i
    end
    i += reverse ? -1 : 1
  end
  nil
end

#go_bottom ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 153

def go_bottom
  @cursor = data.size
  @top = data.size - (@height - 1)
end

#go_to(l) ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 140

def go_to(l)
  if l > @data.size
    l = @data.size
  elsif l < 1
    l = 1
  end

  previous_offset = @cursor - @top
  @cursor = l
  @top = @cursor - previous_offset
  adjust_top!
end

#go_top ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 136

def go_top
  @top = @cursor = 1
end

#pagedown ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 125

def pagedown
  previous_offset = @cursor - @top
  @cursor += @height / 2
  if @cursor > data.size
    @cursor = data.size
  end

  @top = @cursor - previous_offset
  adjust_top!
end

#pageup ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 114

def pageup
  previous_offset = @cursor - @top
  @cursor -= @height / 2
  if @cursor < 1
    @cursor = 1
  end

  @top = @cursor - previous_offset
  adjust_top!
end

#search(term, skip_current_line, reverse) ⇒ Object 



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# File 'lib/git_spelunk/ui/pager.rb', line 80

def search(term, skip_current_line, reverse)
  if term
    @search_term = term
  else
    term = @search_term # nil indicates 'use-last-term'
  end

  search_from = @cursor - 1
  if skip_current_line
    search_from += reverse ? -1 : 1
  end

  p = find_next_index(term, search_from, reverse) ||
        find_next_index(term, reverse ? data.size - 1 : 0, reverse)

  go_to(p + 1) if p
end