Class: Rvim::Buffer

Inherits:
Object
  • Object
show all
Defined in:
lib/rvim/buffer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, filepath = nil, encoding: Encoding::UTF_8) ⇒ Buffer

Returns a new instance of Buffer.



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# File 'lib/rvim/buffer.rb', line 13

def initialize(id, filepath = nil, encoding: Encoding::UTF_8)
  @id = id
  @filepath = filepath
  @fileformat = 'unix'
  @fileencoding = encoding.to_s.downcase
  @mtime = nil
  if filepath && File.exist?(filepath)
    raw = File.binread(filepath)
    @mtime = File.mtime(filepath)
    @fileformat = detect_fileformat(raw)
    decoded = decode_with_encoding(raw, encoding)
    @lines = split_with_format(decoded, @fileformat).map { |l| String.new(l, encoding: encoding) }
  else
    @lines = [String.new('', encoding: encoding)]
  end
  @lines = [String.new('', encoding: encoding)] if @lines.empty?
  @modified = false
  @marks = Rvim::Marks.new
  @line_index = 0
  @byte_pointer = 0
  # Seed the undo history with the file's actual loaded content so the
  # very first undo from a post-edit state restores the on-disk view,
  # not Reline's empty default.
  @undo_redo_history = [[@lines.map(&:dup), 0, 0]]
  @undo_redo_index = 0
  @last_visual = nil
  @local_settings = {}
  @folds = Rvim::Folds.new
  @diff_active = false
  @diff_status = nil
  @vars = {}
end

Instance Attribute Details

#byte_pointer ⇒ Object

Returns the value of attribute byte_pointer.



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# File 'lib/rvim/buffer.rb', line 6

def byte_pointer
  @byte_pointer
end

#diff_active ⇒ Object

Returns the value of attribute diff_active.



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# File 'lib/rvim/buffer.rb', line 9

def diff_active
  @diff_active
end

#diff_status ⇒ Object

Returns the value of attribute diff_status.



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# File 'lib/rvim/buffer.rb', line 9

def diff_status
  @diff_status
end

#fileencoding ⇒ Object

Returns the value of attribute fileencoding.



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# File 'lib/rvim/buffer.rb', line 10

def fileencoding
  @fileencoding
end

#fileformat ⇒ Object

Returns the value of attribute fileformat.



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# File 'lib/rvim/buffer.rb', line 10

def fileformat
  @fileformat
end

#filepath ⇒ Object

Returns the value of attribute filepath.



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# File 'lib/rvim/buffer.rb', line 5

def filepath
  @filepath
end

#folds ⇒ Object

Returns the value of attribute folds.



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# File 'lib/rvim/buffer.rb', line 8

def folds
  @folds
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/rvim/buffer.rb', line 5

def id
  @id
end

#last_visual ⇒ Object

Returns the value of attribute last_visual.



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# File 'lib/rvim/buffer.rb', line 7

def last_visual
  @last_visual
end

#line_index ⇒ Object

Returns the value of attribute line_index.



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# File 'lib/rvim/buffer.rb', line 6

def line_index
  @line_index
end

#lines ⇒ Object

Returns the value of attribute lines.



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# File 'lib/rvim/buffer.rb', line 5

def lines
  @lines
end

#local_settings ⇒ Object

Returns the value of attribute local_settings.



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# File 'lib/rvim/buffer.rb', line 8

def local_settings
  @local_settings
end

#marks ⇒ Object

Returns the value of attribute marks.



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# File 'lib/rvim/buffer.rb', line 6

def marks
  @marks
end

#modified ⇒ Object

Returns the value of attribute modified.



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# File 'lib/rvim/buffer.rb', line 5

def modified
  @modified
end

#mtime ⇒ Object

Returns the value of attribute mtime.



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# File 'lib/rvim/buffer.rb', line 10

def mtime
  @mtime
end

#undo_redo_history ⇒ Object

Returns the value of attribute undo_redo_history.



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# File 'lib/rvim/buffer.rb', line 7

def undo_redo_history
  @undo_redo_history
end

#undo_redo_index ⇒ Object

Returns the value of attribute undo_redo_index.



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# File 'lib/rvim/buffer.rb', line 7

def undo_redo_index
  @undo_redo_index
end

#vars ⇒ Object

Returns the value of attribute vars.



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# File 'lib/rvim/buffer.rb', line 11

def vars
  @vars
end

Instance Method Details

#display_name ⇒ Object 



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# File 'lib/rvim/buffer.rb', line 46

def display_name
  @filepath || '[No Name]'
end

#file_changed_externally? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rvim/buffer.rb', line 50

def file_changed_externally?
  return false unless @filepath && File.exist?(@filepath)
  return false if @mtime.nil?

  File.mtime(@filepath) > @mtime
end

#reload(encoding: Encoding::UTF_8) ⇒ Object 



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# File 'lib/rvim/buffer.rb', line 57

def reload(encoding: Encoding::UTF_8)
  return unless @filepath && File.exist?(@filepath)

  raw = File.binread(@filepath)
  @mtime = File.mtime(@filepath)
  @fileformat = detect_fileformat(raw)
  decoded = decode_with_encoding(raw, encoding)
  @lines = split_with_format(decoded, @fileformat).map { |l| String.new(l, encoding: encoding) }
  @lines = [String.new('', encoding: encoding)] if @lines.empty?
  @line_index = @line_index.clamp(0, [@lines.size - 1, 0].max)
  target = @lines[@line_index] || ''
  @byte_pointer = @byte_pointer.clamp(0, [target.bytesize - 1, 0].max)
end