Class: VER::MiniBuffer

Inherits:
Text
  • Object
show all
Includes:
Keymapped
Defined in:
lib/ver/minibuffer.rb

Direct Known Subclasses

Peer

Defined Under Namespace

Classes: Peer

Constant Summary collapse

HISTORY = 
Hash.new{|h,k| h[k] = SizedArray.new(50) }

Instance Attribute Summary collapse

Attributes included from Keymapped

#major_mode

Attributes inherited from Text

#lock

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Keymapped

#minor_mode, #minor_mode?

Methods inherited from Text

#execute, #execute_only, #focus, #index, #insert=, #inspect, #mark, #mark_next, #mark_previous, #marks, #place_forget, #range, #tag, #tag_ranges, #tags

Constructor Details

#initialize(*args) ⇒ MiniBuffer

Returns a new instance of MiniBuffer.



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# File 'lib/ver/minibuffer.rb', line 34

def initialize(*args)
  super
  setup
end

Instance Attribute Details

#ask_stack ⇒ Object

Returns the value of attribute ask_stack.



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# File 'lib/ver/minibuffer.rb', line 30

def ask_stack
  @ask_stack
end

#asking ⇒ Object (readonly)

Returns the value of attribute asking.



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# File 'lib/ver/minibuffer.rb', line 32

def asking
  @asking
end

#at_insert ⇒ Object

Returns the value of attribute at_insert.



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# File 'lib/ver/minibuffer.rb', line 30

def at_insert
  @at_insert
end

#buffer ⇒ Object (readonly)

Returns the value of attribute buffer.



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# File 'lib/ver/minibuffer.rb', line 32

def buffer
  @buffer
end

#char_width ⇒ Object

Returns the value of attribute char_width.



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# File 'lib/ver/minibuffer.rb', line 30

def char_width
  @char_width
end

#completion_buffer ⇒ Object

Returns the value of attribute completion_buffer.



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# File 'lib/ver/minibuffer.rb', line 30

def completion_buffer
  @completion_buffer
end

#messages ⇒ Object (readonly)

Returns the value of attribute messages.



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# File 'lib/ver/minibuffer.rb', line 32

def messages
  @messages
end

#messages_expire ⇒ Object

Returns the value of attribute messages_expire.



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# File 'lib/ver/minibuffer.rb', line 30

def messages_expire
  @messages_expire
end

#messages_pending ⇒ Object (readonly)

Returns the value of attribute messages_pending.



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# File 'lib/ver/minibuffer.rb', line 32

def messages_pending
  @messages_pending
end

Class Method Details

.answer_from(text) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 21

def self.answer_from(text)
  line = text.get('current linestart', 'current lineend')
  minibuf = VER.minibuf
  minibuf.answer = line
  minibuf.complete_small
end

Instance Method Details

#abort(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 257

def abort(event = nil)
  self.prompt = ''
  self.answer = ''
  completion_buffer.place_forget rescue nil
  @asking = false

  if ask_stack.empty?
    self.messages_expire = false
    @caller.focus
  else
    ask(*ask_stack.shift)
  end
end

#adjust_size(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 130

def adjust_size(event = nil)
  if get_displaychars('1.0', 'end').strip.empty?
    if (info = grid_info) && !info.empty?
      @old_grid_info = info
      grid_forget
    end
  else
    height = count('1.0', 'end', 'displaylines') || 1
    grid_configure(@old_grid_info) if @old_grid_info
    configure(height: height)
  end

  # a generous 25ms to make sure the display is updated.
  # Might need longer, lemme know if that's the case.
  Tk::After.ms(25){ buffer.see(:insert) } if buffer
rescue => ex
  VER.error(ex)
end

#answer ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 161

def answer
  get_displaychars('answer', 'answer.last')
end

#answer=(value) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 157

def answer=(value)
  replace('answer', 'answer.last', value, 'answer')
end

#ask(prompt, options = {}, action = nil, &block) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 233

def ask(prompt, options = {}, action = nil, &block)
  action ||= block

  if @asking
    ask_stack << [prompt, options, action]
  else
    @asking = true
    @action = action || options[:action]
    @caller = options.fetch(:caller)

    self.prompt = prompt
    self.answer = options[:value]
    self.insert = 'answer.last'

    message ''
    warn ''
    self.messages_expire = true

    # Make sure display is ready.
    Tk.update
    focus
  end
end

#attempt(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 271

def attempt(event = nil)
  HISTORY[@prompt.get] << answer
  invoke(:attempt)
end

#claim_focus ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 224

def claim_focus
  bind('<FocusOut>'){ focus; Tk.callback_break }
  focus
end

#common_subchoice(choices) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 311

def common_subchoice(choices)
  longest = choices.max_by{|choice| choice.size }
  common = ''

  longest.each_char do |char|
    current = common + char

    if choices.all?{|choice| choice.start_with?(current) }
      common << char
    else
      break
    end
  end

  common
end

#complete_large(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 298

def complete_large(event = nil)
  if choices = invoke(:complete)
    case choices.size
    when 0
    when 1
      self.answer = choices.first
    else
      self.answer = common_subchoice(choices)
      show_completions(choices)
    end
  end
end

#complete_small(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 286

def complete_small(event = nil)
  if choices = invoke(:complete)
    case choices.size
    when 0
    when 1
      self.answer = choices.first
    else
      self.answer = common_subchoice(choices)
    end
  end
end

#copy(string) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 422

def copy(string)
  Clipboard.dwim = string
end

#delete_next_char(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 370

def delete_next_char(event = nil)
  return unless line = get_displaychars('insert', 'answer.last')
  delete('insert') unless line == ''
  invoke(:modified)
end

#delete_next_word(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 376

def delete_next_word(event = nil)
  line = get_displaychars('insert', 'answer.last')
  return unless word = line[/^\s*(?:\w+|[^\w\s]+)\s*/]
  delete('insert', "insert + #{word.size} chars")
  invoke(:modified)
end

#delete_prev_char(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 383

def delete_prev_char(event = nil)
  return unless compare('insert', '>', 'answer')
  delete('insert - 1 display chars')
  invoke(:modified)
end

#delete_prev_word(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 389

def delete_prev_word(event = nil)
  line = get_displaychars('answer', 'insert').reverse
  return unless word = line[/^\s*(?:\w+|[^\w\s]+)\s*/]
  delete("insert - #{word.size} display chars", 'insert')
  invoke(:modified)
end

#end_of_line(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 358

def end_of_line(event = nil)
  mark_set('insert', 'answer.last')
  invoke(:movement)
end

#events ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 334

def events
  major_mode.event_history
end

#history ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 126

def history
  HISTORY[@prompt.get]
end

#insert_selection(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 348

def insert_selection(event = nil)
  insert(:insert, Tk::Selection.get(type: 'UTF8_STRING'), 'answer')
  invoke(:modified)
end

#insert_string ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 338

def insert_string
  case string = events.last.unicode
  when /^[^\n\r[:cntrl:]]+$/
    insert(:insert, string, 'answer')
    invoke(:modified)
  else
    l insert_string: string
  end
end

#insert_tab(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 353

def insert_tab(event = nil)
  insert(:insert, "\t", 'answer')
  invoke(:modified)
end

#invoke(action, *args) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 328

def invoke(action, *args)
  Tk::Event.generate(self, "<<#{action.capitalize}>>")
  result = @action.call(answer, action, *args)
  result == :abort ? abort : result
end

#kill_end_of_line(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 363

def kill_end_of_line(event = nil)
  content = get_displaychars('insert', 'answer.last')
  copy(content) if content =~ /\S/
  delete('insert', 'answer.last')
  invoke(:modified)
end

#message(string, tag = 'info') ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 176

def message(string, tag = 'info')
  insert = at_insert.index

  begin
    replace("#{tag}.first", "#{tag}.last", " #{string}", tag)
    # mark(tag, "#{tag}.first", :left)
  rescue
    begin
      insert(tag, " #{string}", tag)
    rescue
      insert('1.0 lineend', " #{string}", tag)
    end
  end

  if string.to_s.strip != ''
    messages << string
    message_expire(tag) #  if messages_expire
    # message_notify(tag)
  end
  adjust_size

  self.insert = insert
  see "#{tag}.first"
end

#message_expire(tag, timeout = 5000) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 212

def message_expire(tag, timeout = 5000)
  self.messages_pending[tag] += 1

  Tk::After.ms timeout.to_int do
    self.messages_pending[tag] -= 1
    if messages_pending[tag] == 0
      delete("#{tag}.first", "#{tag}.last") rescue nil
      adjust_size
    end
  end
end

#message_notify(tag, timeout = 500) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 201

def message_notify(tag, timeout = 500)
  tag_add('highlight', "#{tag}.first", "#{tag}.last")

  Tk::After.ms timeout.to_int do
    begin
      tag_remove('highlight', "#{tag}.first", "#{tag}.last")
    rescue
    end
  end
end

#next_char(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 396

def next_char(event = nil)
  return if compare('insert', '>=', 'answer.last')
  mark_set('insert', 'insert + 1 chars')
  invoke(:movement)
end

#next_history ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 437

def next_history
  history = HISTORY[@prompt.get]
  l next_history: history
end

#on_destroy(event) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 118

def on_destroy(event)
  @lock = true
end

#paste(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 426

def paste(event = nil)
  return unless content = Clipboard.dwim
  insert(:insert, content, 'answer')
  invoke(:modified)
end

#peer_create(parent, buffer, *args) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 39

def peer_create(parent, buffer, *args)
  Peer.new(self, parent, buffer, *args)
end

#prev_char(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 402

def prev_char(event = nil)
  return if compare('insert', '<=', 'answer')
  mark_set('insert', 'insert - 1 chars')
  invoke(:movement)
end

#prev_history ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 432

def prev_history
  history = HISTORY[@prompt.get]
  l prev_history: history
end

#prompt ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 153

def prompt
  get_displaychars('prompt', 'prompt.last')
end

#prompt=(value) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 149

def prompt=(value)
  replace('prompt', 'prompt.last', value, 'prompt')
end

#release_focus ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 229

def release_focus
  bind('<FocusOut>'){ }
end

#setup ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 43

def setup
  setup_common

  @info.configure(foreground: '#fff')
  @warn.configure(foreground: '#f00')
  @highlight.configure(background: '#330')

  # Now to the difficult part.
  # When i talk about "tag", i mean the prompt and answer tags.
  #
  # If the "tag" contents are deleted, we will get errors in all places
  # where it's used.
  # To avoid that, we add extra tags called "tag"_keeper.
  # These are elided and contain only one character, their priority is
  # higher than "tag" to sure they never show.
  # The character within is also tagged with "tag".
  # When doing modifications, we just have to make sure that the
  # "tag"_keeper tag stays around.
  # To simplify referencing, we add a mark called "tag" with left gravity.
  # When getting contents of "tag", get only non-elided part.

  @prompt_keeper = tag(:prompt_keeper)
  insert('1.0', 'p', @prompt_keeper)
  @prompt_mark = mark(:prompt, '1.1', :left)
  @prompt_tag  = tag(:prompt, '1.0', '1.1')
  @prompt_keeper.configure(elide: true)
  tag_lower(@prompt_tag, @prompt_keeper)

  @answer_keeper = tag(:answer_keeper)
  insert('1.1', 'a', :answer_keeper)
  @answer_mark = mark(:answer, '1.2', :left)
  @answer_tag  = tag(:answer, '1.1', '1.2')
  @answer_keeper.configure(elide: true)
  tag_lower(@answer_tag, @answer_keeper)

  bind('<Configure>'){ pack_forget }
end

#setup_common ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 81

def setup_common
  configure(
    autoseparators: true,
    background: '#000',
    blockcursor: false,
    borderwidth: 0,
    exportselection: true,
    font: VER.options.font,
    foreground: '#fff',
    highlightbackground: '#000', # this specifies the colors
    highlightcolor: '#fff',      # that are used when the widget
    highlightthickness: 1,       # has input focus.
    insertbackground: '#fff',
    insertofftime: 0,
    setgrid: false, # wtf?
    undo: true,
    wrap: :word
  )

  self.major_mode = :MiniBuffer
  self.messages_expire = false
  @messages_pending = Hash.new(0)
  @messages = SizedArray.new(10)
  self.char_width = VER.options.font.measure('0')
  self.ask_stack = []
  self.at_insert = mark(:insert)
  self.completion_buffer = Tk::Text.new(tk_parent)
  @old_grid_info = nil

  [ :info, :warn, :highlight, :prompt, :answer ].each do |name|
    instance_variable_set("@#{name}", tag(name))
  end

  bind('<Configure>', &method(:adjust_size))
  bind('<Destroy>', &method(:on_destroy))
end

#show_completions(completions) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 276

def show_completions(completions)
  buffer = completion_buffer
  buffer.delete('1.0', 'end')
  completions.each do |completion|
    buffer.insert('end', completion, 'ver.minibuf.completion')
    buffer.insert('end', "\n")
  end
  buffer.place relx: 0.0, rely: 0.9, anchor: :sw, relheight: 0.9
end

#start_of_line(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 408

def start_of_line(event = nil)
  mark_set('insert', 'answer')
  invoke(:movement)
end

#transpose_chars(event = nil) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 413

def transpose_chars(event = nil)
  insert = index('insert')
  line = get_displaychars('insert', 'answer.last')
  line[0, 2] = line[0, 2].reverse
  replace('insert', 'answer.last', line, 'answer')
  mark_set('insert', insert)
  invoke(:modified)
end

#type(string) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 122

def type(string)
  major_mode.fake(string)
end

#warn(object) ⇒ Object 



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# File 'lib/ver/minibuffer.rb', line 165

def warn(object)
  case object
  when Exception
    message("#{object.class}: #{object}", 'warn')
  when Symbol, String
    message(object.to_s, 'warn')
  else
    message(object.to_str, 'warn')
  end
end