Class: GitSpelunk::UI

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

Defined Under Namespace

Classes: PagerWindow, RepoWindow, StatusWindow

Instance Method Summary collapse

Constructor Details

#initialize(file_context) ⇒ UI

Returns a new instance of UI.



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# File 'lib/git_spelunk/ui.rb', line 7

def initialize(file_context)
  Dispel::Screen.open(:colors => true) do |screen|
    @file_context = file_context
    @history = [file_context]

    @pager = PagerWindow.new(0)
    @pager.data = @file_context.get_blame

    @repo = RepoWindow.new(0)
    set_repo_content

    @status = StatusWindow.new
    set_status_message

    calculate_heights!(screen)
    screen.draw *draw
    Dispel::Keyboard.output(timeout: 0.5) do |key|
      handle_key(key)
      calculate_heights!(screen)
      screen.draw *draw
    end
  end
end

Instance Method Details

#after_navigation ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 73

def after_navigation
  @pager.highlight_sha = true
  set_repo_content
  @status.exit_command_mode!
  @status.clear_onetime_message!
end

#calculate_heights!(screen) ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 49

def calculate_heights!(screen)
  status_height = 1
  @repo.height = [(screen.lines.to_f * 0.20).to_i, 6].max
  @pager.height = screen.lines  - @repo.height - status_height
end

#draw ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 31

def draw
  view1, style1 = @pager.draw
  view2, style2 = @repo.draw
  view3, style3 = @status.draw

  cursor = if typing?
    [@pager.height + @repo.height, @status.command_buffer.size + 1]
  else
    [Curses.lines-1, Curses.cols]
  end

  [
    [view1, view2, view3].join("\n"),
    style1 + style2 + style3,
    cursor
  ]
end

#execute_goto ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 192

def execute_goto
  if @status.command_buffer != ''
    @pager.go_to(@status.command_buffer.to_i)
  else
    @pager.go_bottom
  end
  after_navigation
end

#handle_key(key) ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 116

def handle_key(key)
  case key
  when :"Ctrl+d", :page_down
    @pager.pagedown
    after_navigation
  when :"Ctrl+u", :page_up
    @pager.pageup
    after_navigation
  when :"Ctrl+c"
    exit
  when :escape
    @pager.search_term = nil
    @status.exit_command_mode!
    @typing = false
  else
    if typing?
      case key
      when String
        if key == "G" && @typing == :goto
          execute_goto
        else
          @status.command_buffer << key
        end
      when :backspace then @status.command_buffer[-1..-1] = ""
      when :enter
        if @typing == :search
          typed = @status.command_buffer
          @pager.search(typed[1..-1], false, typed[0] == '?')
        elsif @typing == :goto
          execute_goto
        end
        @typing = false
        @status.command_buffer = ""
      end
    else
      case key
      when :down, 'j'
        @pager.cursordown
        after_navigation
      when :up, '-', 'k'
        @pager.cursorup
        after_navigation
      when *(0..9).to_a.map(&:to_s)
        @status.command_buffer = key
        @typing = :goto
      when '['
        history_back
      when ']'
        history_forward
      when 's'
        sha = @pager.blame_line.sha
        Curses.close_screen
        system("git -p --git-dir='#{@file_context.repo.path}' show #{sha} | less")
      when '/', '?'
        @status.command_buffer = key
        @typing = :search
      when 'n'
        @pager.search(nil, true, false)
        after_navigation
      when 'N'
        @pager.search(nil, true, true)
        after_navigation
      when ' '
        @pager.pagedown
        after_navigation
      when 'q'
        exit
      end
    end
  end
end

#history_back ⇒ Object 



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

def history_back
  @status.set_onetime_message("Rewinding...")
  goto = @file_context.get_line_for_sha_parent(@pager.blame_line)
  if goto.is_a?(Fixnum)
    @file_context.line_number = @pager.cursor
    @history.push(@file_context)


    @file_context = @file_context.clone_for_blame_line(@pager.blame_line)
    @pager.data = @file_context.get_blame
    @pager.go_to(goto)

    set_repo_content
    @status.clear_onetime_message!
    set_status_message
  elsif goto == :at_beginning_of_time
    @status.set_onetime_message("At beginning of repository history!")
  elsif goto == :unable_to_trace
    @status.set_onetime_message("Unable to trace lineage of file line")
  elsif goto == :first_commit_for_file
    @status.set_onetime_message("At first appearance of file")
  end
end

#history_forward ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 104

def history_forward
  if @history.last
    @file_context = @history.pop
    @pager.data = @file_context.get_blame
    @pager.go_to(@file_context.line_number)
    set_repo_content

    @status.clear_onetime_message!
    set_status_message
  end
end

#set_repo_content ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 59

def set_repo_content
  info = @file_context.get_line_commit_info(@pager.blame_line)
  content = <<-EOL
commit: #{info[:commit]}
Author: #{info[:author]}
Date: #{info[:date]}

  EOL
  message_lines = info[:message].split(/\r?\n/)
  content += message_lines[0..(@repo.height - 6)].join("\n")
  @repo.content = content
  @repo.draw
end

#set_status_message ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 55

def set_status_message
  @status.status_message = "#{@file_context.file} @ #{@file_context.sha}"
end

#typing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/git_spelunk/ui.rb', line 188

def typing?
  @status.command_buffer.size > 0
end