Class: Hokusai::Blocks::Input

Inherits:
Hokusai::Block show all
Defined in:
ui/src/hokusai/blocks/input.rb

Instance Attribute Summary collapse

Attributes inherited from Hokusai::Block

#node, #provides, #publisher

Instance Method Summary collapse

Methods inherited from Hokusai::Block

#children, #children?, compile, computed, computed!, #draw, #draw_with, #dump, #emit, inject, inject!, #method_missing, mount, #on_resize, provide, provides, style, styles_get, template, template_from_file, template_get, #update, use, uses

Constructor Details

#initialize(**args) ⇒ Input

Returns a new instance of Input.



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# File 'ui/src/hokusai/blocks/input.rb', line 39

def initialize(**args)
  super

  @table = ::Hokusai::Util::PieceTable.new(initial)
  @buffer = ""
  @buffer_count = 0
  @start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  @buffer_offset = 0
  @offset = 0
  @changed = false
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Hokusai::Block

Instance Attribute Details

#buffer ⇒ Object

Returns the value of attribute buffer.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def buffer
  @buffer
end

#buffer_count ⇒ Object

Returns the value of attribute buffer_count.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def buffer_count
  @buffer_count
end

#buffer_offset ⇒ Object

Returns the value of attribute buffer_offset.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def buffer_offset
  @buffer_offset
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def offset
  @offset
end

#start_time ⇒ Object

Returns the value of attribute start_time.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def start_time
  @start_time
end

#table ⇒ Object

Returns the value of attribute table.



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# File 'ui/src/hokusai/blocks/input.rb', line 36

def table
  @table
end

Instance Method Details

#after_updated ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 51

def after_updated
  if @changed && !growable
    @table = ::Hokusai::Util::PieceTable.new(initial)
    @buffer = ""
    @buffer_count = 0
    @start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
    @buffer_offset = 0
    @offset = 0
    @changed = false
  end
end

#cursor_offset ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 174

def cursor_offset
  offset + buffer.size
end

#dynamic_keypress_handle(event) ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 89

def dynamic_keypress_handle(event)
  return unless node.meta.focused
  case event
  when proc(&:ctrl), proc(&:super)
    if event.char == "z"
      table.undo
    end

    return
  else
    case event.key
    when :right
      flush

      self.offset += 1 unless offset + 1 > table.to_s.size
    when :left
      flush
      
      self.offset = offset - 1 <= 0 ? 0 : offset - 1
    when :down, :up
      # no op
    when :delete, :backspace
      flush

      if buffer_count > 0
        table.delete(offset, buffer_count)
      elsif offset > 0
        table.delete(offset - 1, 1)

        self.offset -= 1
      end

      self.buffer_count = 0

      return
    when :enter
      if buffer.size.zero?
        self.buffer_offset = offset
      end

      unless growable
        flush
        
        emit("change", table.to_s)
        @changed = true

        self.table = ::Hokusai::Util::PieceTable.new("")
        self.buffer_offset = 0
        self.offset = 0

        return
      end

      self.buffer += "\n"
    else
      if buffer_count > 0
        flush
        
        table.delete(offset, buffer_count)

        self.buffer_offset = offset
        self.buffer_count = 0
      end

      if buffer.size.zero?
        self.buffer_offset = offset
      end

      self.buffer += event.char
    end
  end

  emit("modified")
end

#flush ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 164

def flush
  if buffer.size > 0
    table.insert(buffer, buffer_offset)

    self.offset = cursor_offset
    self.buffer_offset = 0
    self.buffer = ""
  end
end

#handle_select_offset(value) ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 82

def handle_select_offset(value)
  flush
  
  self.offset = value
  self.buffer_count = 0
end

#handle_selected(start, stop) ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 69

def handle_selected(start, stop)
  flush

  return if start.nil?

  self.offset = start
  self.buffer_count = 0

  return if stop.nil?

  self.buffer_count = (stop + 1) - start
end

#render(canvas) {|canvas| ... } ⇒ Object

Yields:

  • (canvas) 


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# File 'ui/src/hokusai/blocks/input.rb', line 193

def render(canvas)
  if !buffer.empty? && (Process.clock_gettime(Process::CLOCK_MONOTONIC) - start_time) > 10
    flush

    if table.pieces.size > 10
      self.table = Util::PieceTable.new(table.to_s)
    end

    self.start_time = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  end

  draw do
    rect(canvas.x, canvas.y, canvas.width, canvas.height) do |command|
      command.color = background if background
      command.outline = outline if outline
      command.outline_color = outline_color if outline_color
      command.round = rounding if rounding

      canvas = command.trim_canvas(canvas)
    end
  end

  yield canvas
end

#text_content ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 178

def text_content
  StringIO.open do |io|
    saved = table.to_s

    io.write saved[0...buffer_offset]
    io.write buffer

    if last = saved[buffer_offset..-1]
      io.write last
    end

    io.string
  end
end

#update_height(value) ⇒ Object 



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# File 'ui/src/hokusai/blocks/input.rb', line 63

def update_height(value)
  node.meta.props[:height] = value

  emit("height_updated", value)
end