Class: Canis::DefaultKeyHandler

Inherits:

Object

• Object
• Canis::DefaultKeyHandler

Defined in:

lib/canis/core/widgets/textpad.rb

Overview

It takes care of catching numbers so that vim’s movement can use numeric args. That is taken care of by multiplier. Other than that it has the key_map process the key.

Instance Method Summary

• #handle_key(ch) ⇒ Object
• #initialize(source) ⇒ DefaultKeyHandler constructor

  —- {{{.

Constructor Details

#initialize(source) ⇒ DefaultKeyHandler

—- {{{

# File 'lib/canis/core/widgets/textpad.rb', line 1616

def initialize source
  @source = source
end

Instance Method Details

#handle_key(ch) ⇒ Object

# File 'lib/canis/core/widgets/textpad.rb', line 1620

def handle_key ch
  begin
    case ch
    when ?0.getbyte(0)..?9.getbyte(0)
      if ch == ?0.getbyte(0) && $multiplier == 0
        @source.cursor_bol
        @source.bounds_check
        return 0
      end
      # storing digits entered so we can multiply motion actions
      $multiplier *= 10 ; $multiplier += (ch-48)
      return 0
    when ?\C-c.getbyte(0)
      $multiplier = 0
      return 0
    else
      # check for bindings, these cannot override above keys since placed at end
      begin
        ret = @source.process_key ch, self
        $multiplier = 0
        @source.bounds_check
        ## If i press C-x > i get an alert from rwidgets which blacks the screen
        # if i put a padrefresh here it becomes okay but only for one pad,
        # i still need to do it for all pads.
      rescue => err
        $log.error " TEXTPAD ERROR handle_key #{err} "
        $log.debug(err.backtrace.join("\n"))
        alert "#{err}"
        #textdialog ["Error in TextPad: #{err} ", *err.backtrace], :title => "Exception"
      end
      # --- NOTE ABOUT BLACK RECT LEFT on SCREEN {{{
      ## NOTE if textpad does not handle the event and it goes to form which pops
      # up a messagebox, then padrefresh does not happen, since control does not 
      # come back here, so a black rect is left on screen
      # please note that a bounds check will not happen for stuff that 
      # is triggered by form, so you'll have to to it yourself or 
      # call setrowcol explicity if the cursor is not updated
      # --- }}}

      return :UNHANDLED if ret == :UNHANDLED
    end
  rescue => err
    $log.error " TEXTPAD ERROR 591 #{err} "
    $log.debug( err) if err
    $log.debug(err.backtrace.join("\n")) if err
    # NOTE: textdialog itself is based on this class.
    alert "#{err}"
    #textdialog ["Error in TextPad: #{err} ", *err.backtrace], :title => "Exception"
    $error_message.value = ""
  ensure
    # this means that even unhandled will trigger a refresh
    @source.padrefresh
    Ncurses::Panel.update_panels
  end
  return 0
end