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,
lib/git_spelunk/ui/window.rb

Defined Under Namespace

Classes: PagerWindow, RepoWindow, StatusWindow, Window

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 9

def initialize(file_context)
  init_curses

  calculate_heights!
  @file_context = file_context
  @history = [file_context]

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

  @repo = RepoWindow.new(@repo_height, @pager_height)

  @status = StatusWindow.new(1, Curses.lines - 1)
  set_status_message
end

Instance Method Details

#after_navigation ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 81

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

#calculate_heights! ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 38

def calculate_heights!
  @repo_height = [(Curses.lines.to_f * 0.20).to_i, 6].max
  @pager_height = Curses.lines  - @repo_height - 1
  @status_height = 1
end

#getline ⇒ Object

you’d really think there was a better way



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# File 'lib/git_spelunk/ui.rb', line 186

def getline
  while ch = Curses.getch
    case ch
    when Curses::KEY_CTRL_C
      @status.command_buffer = ''
      return
    when Curses::KEY_CTRL_M
      return @status.command_buffer[1..-1]
    when Curses::KEY_BACKSPACE, Curses::KEY_CTRL_H, 127
      if @status.command_buffer == "/"
        return
      end
      @status.command_buffer.chop!
    else
      if ch.is_a?(String)
        @status.command_buffer += ch
      end
    end
    @status.draw
  end
end

#handle_key(key) ⇒ Object 



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

def handle_key(key)
  @heartbeat = Time.now
  case key
  when Curses::KEY_DOWN, 'j'
    @pager.cursordown
    after_navigation
  when Curses::KEY_UP, '-', 'k'
    @pager.cursorup
    after_navigation
  when Curses::KEY_CTRL_D, ' '
    @pager.pagedown
    after_navigation
  when Curses::KEY_CTRL_U
    @pager.pageup
    after_navigation
  when *(0..9).to_a.map(&:to_s)
    @status.command_buffer += key
  when Curses::KEY_CTRL_M
    if @status.command_buffer != ''
      @pager.go_to(@status.command_buffer.to_i)
    end
    after_navigation
  when 'G'
    if @status.command_buffer != ''
      @pager.go_to(@status.command_buffer.to_i)
    else
      @pager.go_bottom
    end
    after_navigation
  when '['
    history_back
  when ']'
    history_forward
  when 's'
    @heartbeat = nil
    sha = @file_context.sha_for_line(@pager.cursor)
    Curses.close_screen
    system("git -p --git-dir='#{@file_context.repo.path}' show #{sha} | less")
    Curses.stdscr.refresh
  when '/', '?'
    @heartbeat = nil
    @status.command_buffer = key
    @status.draw

    line = getline
    if line
      @pager.search(line, false, key == '?')
    end
    @status.exit_command_mode!
  when 'n'
    @pager.search(nil, true, false)
    after_navigation
  when 'N'
    @pager.search(nil, true, true)
    after_navigation
  when 'q', Curses::KEY_CTRL_C
    exit
  end
end

#heartbeat_expired? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/git_spelunk/ui.rb', line 77

def heartbeat_expired?
  @heartbeat && (Time.now - @heartbeat).to_f > 0.30
end

#history_back ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 87

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

    @file_context = @file_context.clone_for_parent_sha(@pager.cursor)
    @pager.data = @file_context.get_blame
    @pager.go_to(goto)

    # force commit info update
    @status.clear_onetime_message!
    set_status_message
    @last_line = nil
  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 111

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

    @status.clear_onetime_message!
    set_status_message

    # force commit info update
    @last_line = nil
  end
end

#init_curses ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 25

def init_curses
  Curses.init_screen
  Curses.start_color
  Curses.raw
  Curses.nonl
  Curses.noecho
  Curses.curs_set(0)
  screen = Curses.stdscr
  screen.refresh
  screen.keypad(1)
  Curses.init_pair(ACTIVE_SHA_COLOR, Curses::COLOR_GREEN, Curses::COLOR_BLACK)
end

#pause_thread ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 57

def pause_thread
  Thread.abort_on_exception = true
  Thread.new do
    while true
      if heartbeat_expired? && @last_line != @pager.cursor
        current_line = @pager.cursor
        content = @file_context.get_line_commit_info(current_line)
        if heartbeat_expired? && @pager.cursor == current_line
          @repo.content = content
          @repo.draw
          @last_line = current_line
        else
          @heartbeat = Time.now
        end
      end
      sleep 0.05
    end
  end
end

#run ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 44

def run
  @repo.content = @file_context.get_line_commit_info(@pager.cursor)
  pause_thread
  begin
    [@pager, @repo, @status].each(&:draw)
    handle_key(Curses.getch)
  end while true
end

#set_status_message ⇒ Object 



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# File 'lib/git_spelunk/ui.rb', line 53

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