Class: KeyBindingTree

Inherits:
Object
  • Object
show all
Defined in:
lib/vimamsa/key_binding_tree.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ KeyBindingTree 



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# File 'lib/vimamsa/key_binding_tree.rb', line 46

def initialize()
  @next_command_count = nil
  @modes = {}
  @root = State.new("ROOT")
  @cur_state = @root # used for building the tree
  @default_mode = nil
  @default_mode_stack = []
  @mode_history = []
  @state_trail = []
  @last_action = nil
  @cur_action = nil
  @method_handles_repeat = false

  @modifiers = { :ctrl => false, :shift => false, :alt => false } # TODO: create a queue
  @last_event = [nil, nil, nil, nil, nil]

  @override_keyhandling_callback = nil
  # Allows h["foo"]["faa"]=1
  @act_bindings = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
end

Instance Attribute Details

#act_bindings ⇒ Object (readonly)

Returns the value of attribute act_bindings.



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# File 'lib/vimamsa/key_binding_tree.rb', line 44

def act_bindings
  @act_bindings
end

#C ⇒ Object

Returns the value of attribute C.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def C
  @C
end

#cur_action ⇒ Object

Returns the value of attribute cur_action.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def cur_action
  @cur_action
end

#cur_state ⇒ Object

Returns the value of attribute cur_state.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def cur_state
  @cur_state
end

#default_mode ⇒ Object

Returns the value of attribute default_mode.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def default_mode
  @default_mode
end

#default_mode_stack ⇒ Object (readonly)

Returns the value of attribute default_mode_stack.



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# File 'lib/vimamsa/key_binding_tree.rb', line 44

def default_mode_stack
  @default_mode_stack
end

#I ⇒ Object

Returns the value of attribute I.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def I
  @I
end

#last_action ⇒ Object

Returns the value of attribute last_action.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def last_action
  @last_action
end

#match_state ⇒ Object

Returns the value of attribute match_state.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def match_state
  @match_state
end

#method_handles_repeat ⇒ Object

Returns the value of attribute method_handles_repeat.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def method_handles_repeat
  @method_handles_repeat
end

#mode_root_state ⇒ Object (readonly)

Returns the value of attribute mode_root_state.



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# File 'lib/vimamsa/key_binding_tree.rb', line 44

def mode_root_state
  @mode_root_state
end

#modifiers ⇒ Object

Returns the value of attribute modifiers.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def modifiers
  @modifiers
end

#next_command_count ⇒ Object

Returns the value of attribute next_command_count.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def next_command_count
  @next_command_count
end

#root ⇒ Object

Returns the value of attribute root.



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# File 'lib/vimamsa/key_binding_tree.rb', line 43

def root
  @root
end

#state_trail ⇒ Object (readonly)

Returns the value of attribute state_trail.



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# File 'lib/vimamsa/key_binding_tree.rb', line 44

def state_trail
  @state_trail
end

Instance Method Details

#__set_mode(label) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 208

def __set_mode(label)
  debug "__set_mode(#{label})"
  @mode_history << @mode_root_state

  # Check if label in form :label
  if @modes.has_key?(label)
    @mode_root_state = @modes[label]
    set_state_to_root
  else
    # Check if label matches mode name in string format
    for mode in @root.children
      if mode.key_name == label
        @mode_root_state = mode
      end
    end
  end
  @cur_mode = label

  if self.get_scope != :editor and !vma.buf.nil?
    vma.buf.mode_stack = @default_mode_stack.clone
  end

  if !vma.gui.view.nil?
    vma.gui.view.draw_cursor()  #TODO: handle outside this class
  end
end

#_bindkey(key, action, keywords: []) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 540

def _bindkey(key, action, keywords: [])
  key.strip!
  key.gsub!(/\s+/, " ")

  # if key.class == Array
  # key.each { |k| bindkey(k, action) }
  # return
  # end
  # $action_list << { :action => action, :key => key }
  if !vma.actions.include?(action)
    if action.class == String
      reg_act(action, proc { eval(action) }, action)
    end
  end

  m = key.match(/^(\S+)\s(\S.*)$/)
  # Match/split e.g. "VC , , s" to "VC" and ", , s"
  if m
    modetmp = m[1]
    debug [key, modetmp, m].inspect

    # If all of first word are uppercase, e.g. in
    # "VCIX left" => "buf.move(BACKWARD_CHAR)",
    # interpret as each char representing a mode
    modes = modetmp.split("") if modetmp.match(/^\p{Lu}+$/) # Uppercase

    # If all of first word is down case, like in:
    # bindkey "audio space", :audio_stop
    # interpret as whole word representing a mode.
    modes = [modetmp] if modetmp.match(/^\p{Ll}+$/) # Lowercase
    keydef = m[2]
  else
    fatal_error("Error in keydef #{key.inspect}")
  end

  # puts "keywords #{keywords}"
  modes.each { |mode_id|
    mode_bind_key(mode_id, keydef, action, keywords: keywords)

    # Map froma actions to keybindings (e.g. to show bindings in menu)
    @act_bindings[mode_id][action] = keydef
  }
end

#add_minor_mode(id, label, major_mode_label) ⇒ Object

Add keyboard key binding mode based on another mode



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# File 'lib/vimamsa/key_binding_tree.rb', line 133

def add_minor_mode(id, label, major_mode_label)
  mode = State.new(id)
  @modes[label] = mode
  if @root.nil?
    show_caller
  end
  @root.children << mode
  mode.major_modes << major_mode_label
end

#add_mode(id, label, cursortype = :command, name: nil, scope: :buffer) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 122

def add_mode(id, label, cursortype = :command, name: nil, scope: :buffer)
  mode = State.new(id, "", cursortype, scope: scope)
  mode.level = 1
  @modes[label] = mode
  @root.children << mode
  if @default_mode == nil
    set_default_mode(label)
  end
end

#bindkey(key, action, keywords: "") ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 517

def bindkey(key, action, keywords: "")
  # puts "keywords #{keywords}" if !keywords.empty?
  if keywords.class == String
    keywords = keywords.split(" ")
  end
  # puts "keywords #{keywords}" if !keywords.empty?
  if key.class != Array
    # Handle syntax like :
    # "X esc || X ctrl!" => "vma.kbd.to_previous_mode",
    key = key.split("||")
  end

  a = action
  if action.class == Array
    label = a[0]
    a = label
    proc = action[1]
    msg = action[2]
    reg_act(label, proc, msg)
  end
  key.each { |k| _bindkey(k, a, keywords: keywords) }
end

#clear_modifiers ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 143

def clear_modifiers()
  # @modifiers = [] #TODO:remove?
end

#cur_mode_str ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 239

def cur_mode_str()
  return @mode_root_state.key_name
end

#dump_state ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 96

def dump_state
  debug "dump_state", 2
  pp ["@default_mode_stack", @default_mode_stack]
  pp ["@default_mode", @default_mode]
  pp ["vma.buf.mode_stack", vma.buf.mode_stack]
  pp ["scope", self.get_scope]
  # pp ["@mode_root_state", @mode_root_state]
  # pp ["@match_state", @match_state]
end

#find_state(key_name, eval_rule) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 147

def find_state(key_name, eval_rule)
  @cur_state.children.each { |s|
    if s.key_name == key_name and s.eval_rule == eval_rule
      # TODO check eval
      return s
    end
  }
  return nil
end

#get_by_keywords(modes: [], keywords: []) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 272

def get_by_keywords(modes: [], keywords: [])
  s = ""
  stack = [[@root, ""]]
  lines = []

  # Traverse the tree (class State objects) using a stack
  while stack.any?
    t, p = *stack.pop # t = current state, p = current path
    if t.children.any?
      t.children.reverse.each { |c|

        # Restrict by modes if specified
        if c.level == 1 and !modes.empty?
          next if !modes.include?(c.key_name)
        end

        if c.eval_rule.size > 0
          new_p = "#{p} #{c.key_name}(#{c.eval_rule})"
        else
          if c.level == 1
            new_p = "#{p} [#{c.key_name}]"
          else
            new_p = "#{p} #{c.key_name}"
          end
        end
        stack << [c, new_p]
      }
      # stack.concat[t.children]

    else
      method_desc = t.action
      if t.action.class == Symbol
        if vma.actions.include?(t.action)
          a = vma.actions[t.action].method_name
          if !a.nil? and !a.empty?
            method_desc = a
          end
        end
      end

      if (keywords - t.keywords).empty? # All keywords are present
        kw = ""
        # kw = ", [#{t.keywords.join(",")}]" if !t.keywords.empty?
        lines << p + " : #{method_desc}#{kw}"
      end
    end
  end
  s = lines.sort.join("\n")
  return s
end

#get_cursor_type ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 243

def get_cursor_type
  @mode_root_state.cursor_type
end

#get_mode ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 247

def get_mode
  return @cur_mode
end

#get_scope ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 235

def get_scope
  @mode_root_state.scope
end

#get_state_trail_str ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 368

def get_state_trail_str
  s_trail = ""
  last_state = @state_trail.last
  last_state = last_state[0] if last_state.class == Array
  first = true
  for st in @state_trail
    st = st[0] if st.class == Array
    if first
      trailpfx = ""
      if !st.major_modes.empty?
        mmid = st.major_modes.first
        trailpfx = "#{@modes[mmid].to_s}>"
      end
      s_trail << "[#{trailpfx}#{st.to_s}]"
    else
      s_trail << " #{st.to_s}"
    end
    first = false
  end
  children = ""
  for cstate in last_state.children
    act_s = "..."
    act_s = cstate.action.to_s if cstate.action != nil
    children << "  #{cstate.to_s} #{act_s}\n"
  end
  if !@next_command_count.nil?
    s_trail << " #{@next_command_count}"
  end
  return [s_trail, children]
end

#handle_key_bindigs_action(action, c) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 641

def handle_key_bindigs_action(action, c)
  # $acth << action #TODO:needed here?
  @method_handles_repeat = false #TODO:??
  n = 1
  if @next_command_count and !(action.class == String and action.include?("set_next_command_count"))
    n = @next_command_count
    debug("COUNT command #{n} times")
  end

  begin
    n.times do
      ret = exec_action(action)

      if vma.macro.is_recording and ret != false
        debug "RECORD ACTION:#{action}", 2
        vma.macro.record_action(action)
      end
      break if @method_handles_repeat
      # Some methods have specific implementation for repeat,
      #   like '5yy' => copy next five lines. (copy_line())
      # By default the same command is just repeated n times
      #   like '20j' => go to next line 20 times.
      # But methods can also handle the number input themselves if vma.kbd.method_handles_repeat=true is set,
    end
    # run_as_idle proc { vma.buf.refresh_cursor; vma.buf.refresh_cursor }, delay: 0.05
  rescue SyntaxError
    message("SYNTAX ERROR with eval cmd #{action}: " + $!.to_s)
    # rescue NoMethodError
    # debug("NoMethodError with eval cmd #{action}: " + $!.to_s)
    # rescue NameError
    # debug("NameError with eval cmd #{action}: " + $!.to_s)
    # raise
  rescue Exception => e
    puts "BACKTRACE"
    puts e.backtrace
    puts e.inspect
    puts "BACKTRACE END"
    if $!.class == SystemExit
      exit
    else
      crash("Error with action: #{action}: ", e)
    end
  end

  if !(action.class == String and action.include?("set_next_command_count"))
    @next_command_count = nil
  end
end

#match(key_name) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 165

def match(key_name)
  new_state = []
  debug = false
  @match_state.each { |parent|
    parent.children.each { |c|
      # printf(" KEY MATCH: ")
      # debug [c.key_name, key_name].inspect
      if c.key_name == key_name and c.eval_rule == ""
        new_state << c
      elsif c.key_name == key_name and c.eval_rule != ""
        debug "CHECK EVAL: #{c.eval_rule}"
        if eval(c.eval_rule)
          # if eval_rule.match(/macro/)
          debug = true
          # end
          new_state << c
          debug "EVAL TRUE"
        else
          debug "EVAL FALSE"
        end
      end
    }
  }

  if debug
    # require "pry"; binding.pry
  end

  if new_state.any? # Match found
    @match_state = new_state
    return new_state
    # return true
  else # No match found
    # @match_state = [@C] #TODO
    return nil
  end
end

#match_key_conf(c, translated_c, event_type) ⇒ Object

Modifies state of key binding tree (move to new state) based on received event Checks child nodes of current state if they match received event if yes, change state to child if no, go back to root



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# File 'lib/vimamsa/key_binding_tree.rb', line 412

def match_key_conf(c, translated_c, event_type)
  debug "MATCH KEY CONF: #{[c, translated_c]}"

  if !@override_keyhandling_callback.nil?
    ret = @override_keyhandling_callback.call(c, event_type)
    return if ret
  end

  eval_s = nil

  new_state = match(c)
  # #TODO:
  # new_state = match(translated_c)
  # if new_state == nil and translated_c.index("shift") == 0
  # new_state = match(c)
  # end

  if new_state == nil
    s1 = match_state[0].children.select { |s| s.key_name.include?("<char>") } # TODO: [0]
    if s1.any? and (c.size == 1) and event_type == :key_press
      eval_s = s1.first.action.clone
      # eval_s.gsub!("<char>","'#{c}'") #TODO: remove
      new_state = [s1.first]
    end
  end

  if new_state == nil
    # Child is regexp like /[1-9]/ in:
    # 'C /[1-9]/'=> 'set_next_command_count(<char>)',
    # Execute child regexps one until matches
    s1 = match_state[0].children.select { |s|
      s.key_name =~ /^\/.*\/$/
    } # TODO: [0]

    if s1.any? and c.size == 1
      s1.each { |x|
        m = /^\/(.*)\/$/.match(x.key_name)
        if m != nil
          m2 = Regexp.new(m[1]).match(c)
          if m2 != nil
            eval_s = x.action.clone
            new_state = [x]
            break
          end

          return true
        end
      }
      # eval_s = s1.first.action.clone
      # eval_s.gsub!("<char>","'#{c}'")
      # new_state = [s1.first]
    end
  end

  if new_state != nil
    @state_trail << new_state
  end

  if new_state == nil
    debug("NO MATCH")
    if event_type == :key_press and c != "shift"
      # TODO:include other modifiers in addition to shift?
      set_state_to_root
      printf(", BACK TO ROOT") if cnf.debug?
    end

    if event_type == :key_release and c == "shift!"
      # Pressing a modifier key (shift) sets state back to root
      # only on key release when no other key has been pressed
      # after said modifier key (shift).
      set_state_to_root
      printf(", BACK TO ROOT") if cnf.debug?
    end

    printf("\n") if cnf.debug?
  else

    # Don't execute action if one of the states has children
    # TODO: why?
    state_with_children = new_state.select { |s| s.children.any? }
    s_act = new_state.select { |s| s.action != nil }

    if s_act.any? #and !state_with_children.any?
      eval_s = s_act.first.action if eval_s == nil
      # if eval_s.to_s.match(/end_recording/)
      # require "pry"; binding.pry
      # end
      debug "FOUND MATCH:#{eval_s}"
      debug "CHAR: #{c}"
      c.gsub!("\\", %q{\\\\} * 4) # Escape \ -chars
      c.gsub!("'", "#{'\\' * 4}'") # Escape ' -chars

      eval_s.gsub!("<char>", "'#{c}'") if eval_s.class == String
      debug eval_s
      debug c
      handle_key_bindigs_action(eval_s, c)
      set_state_to_root
    end
  end

  show_state_trail #TODO: check if changed

  return true
end

#mode_bind_key(mode_id, keydef, action, keywords: []) ⇒ Object

Binds a keyboard key combination to an action, for a given keyboard mode like insert (“I”) or command (“C”)



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# File 'lib/vimamsa/key_binding_tree.rb', line 586

def mode_bind_key(mode_id, keydef, action, keywords: [])
  # debug "mode_bind_key #{mode_id.inspect}, #{keydef.inspect}, #{action.inspect}", 2
  # Example:
  # bindkey "C , f", :gui_file_finder
  # mode_id = "C", keydef = ", f"
  # and action = :gui_file_finder

  set_state(mode_id, "") # TODO: check is ok?
  start_state = @cur_state

  k_arr = keydef.split #e.g. definition: "C y e" = > ["C", "y", "e"]

  prev_state = nil
  s1 = start_state

  k_arr.each_with_index { |k, idx|
    # check if key has rules for context like q has in
    # "C q(cntx.recording_macro==true)"
    last_item = false
    if k_arr.size - 1 == idx
      last_item = true
    end
    match = /(.+)\((.*)\)/.match(k)
    eval_rule = ""
    if match
      key_name = match[1]
      eval_rule = match[2]
    else
      key_name = k
    end

    prev_state = s1
    # Create a new state for key if it doesn't exist
    s1 = find_state(key_name, eval_rule)
    if s1 == nil or last_item
      new_state = State.new(key_name, eval_rule)
      if last_item
        # Override existing key definition
        @cur_state.children.delete(s1)
      end
      s1 = new_state
      @cur_state.children << new_state
    end

    set_state(key_name, eval_rule) # TODO: check is ok?
  }
  if action == :delete_state
    prev_state.children.delete(cur_state)
  else
    @cur_state.action = action
  end
  @cur_state.keywords = keywords
  @cur_state = @root
end

#remove_keyhandling_override ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 161

def remove_keyhandling_override()
  @override_keyhandling_callback = nil
end

#set_default_mode(label) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 80

def set_default_mode(label)
  @match_state = [@modes[label]]
  @mode_root_state = @modes[label]
  @default_mode = label
  set_mode_stack [label]
end

#set_keyhandling_override(_callback) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 157

def set_keyhandling_override(_callback)
  @override_keyhandling_callback = _callback
end

#set_mode(label) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 67

def set_mode(label)
  return if get_mode == :label
  @match_state = [@modes[label]] # used for matching input
  @mode_root_state = @modes[label]
  # @default_mode = label
  @default_mode_stack << label

  __set_mode(label)
  if !vma.buf.nil?
    # vma.buf.mode_stack = @default_mode_stack.clone
  end
end

#set_mode_stack(ms) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 87

def set_mode_stack(ms)
  debug "set_mode_stack(#{ms})", 2
  show_caller if cnf.debug? # TODO: remove
  @default_mode_stack = ms
  label = @default_mode_stack[-1]
  @match_state = [@modes[label]]
  @mode_root_state = @modes[label]
end

#set_mode_to_default ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 106

def set_mode_to_default()
  # set_mode(@default_mode)
  set_mode_stack [@default_mode_stack[0]]
  __set_mode(@default_mode_stack[0])
end

#set_next_command_count(num) ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 399

def set_next_command_count(num)
  if @next_command_count != nil
    @next_command_count = @next_command_count * 10 + num.to_i
  else
    @next_command_count = num.to_i
  end
  debug("NEXT COMMAND COUNT: #{@next_command_count}")
end

#set_state(key_name, eval_rule = "") ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 251

def set_state(key_name, eval_rule = "")
  new_state = find_state(key_name, eval_rule)
  if new_state != nil
    @cur_state = new_state
  else
    @cur_state = @mode_root_state # TODO
  end
end

#set_state_to_root ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 260

def set_state_to_root
  if @mode_root_state.major_modes.size == 1
    modelabel = @mode_root_state.major_modes[0]
    mmode = @modes[modelabel]
    @match_state = [@mode_root_state, mmode]
  else
    @match_state = [@mode_root_state]
  end

  @state_trail = [@mode_root_state]
end

#show_state_trail ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 203

def show_state_trail
  (st, children) = get_state_trail_str()
  vma.gui.statnfo.markup = "<span weight='ultrabold'>#{st}</span>"
end

#to_previous_mode ⇒ Object 



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# File 'lib/vimamsa/key_binding_tree.rb', line 112

def to_previous_mode()
  debug "to_previous_mode", 2
  debug @default_mode_stack
  if @default_mode_stack.size > 1
    @default_mode_stack.pop
  end
  debug @default_mode_stack
  __set_mode(@default_mode_stack[-1])
end

#to_s ⇒ Object

Print key bindings to show as documentation or for debugging



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# File 'lib/vimamsa/key_binding_tree.rb', line 324

def to_s()
  return self.class.to_s
  s = ""
  # @cur_state = @root
  stack = [[@root, ""]]
  lines = []

  # Traverse the tree (class State objects) using a stack
  while stack.any?
    t, p = *stack.pop # t = current state, p = current path
    if t.children.any?
      t.children.reverse.each { |c|
        if c.eval_rule.size > 0
          new_p = "#{p} #{c.key_name}(#{c.eval_rule})"
        else
          if c.level == 1
            new_p = "#{p} [#{c.key_name}]"
          else
            new_p = "#{p} #{c.key_name}"
          end
        end
        stack << [c, new_p]
      }
      # stack.concat[t.children]
    else
      method_desc = t.action
      if t.action.class == Symbol
        if vma.actions.include?(t.action)
          a = vma.actions[t.action].method_name
          if !a.nil? and !a.empty?
            method_desc = a
          end
        end
      end

      kw = ""
      # kw = ", " + t.keywords.join(",") if !t.keywords.empty?
      lines << p + " : #{method_desc}#{kw}"
    end
  end
  s = lines.sort.join("\n")
  return s
end