Class: RuVim::Screen

Inherits:
Object
  • Object
show all
Defined in:
lib/ruvim/screen.rb

Constant Summary collapse

DEFAULT_TABSTOP = 
2
SYNTAX_CACHE_LIMIT = 
2048
WRAP_SEGMENTS_CACHE_LIMIT = 
1024

Instance Method Summary collapse

Constructor Details

#initialize(terminal:) ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/ruvim/screen.rb', line 8

def initialize(terminal:)
  @terminal = terminal
  @last_frame = nil
  @syntax_color_cache = {}
  @wrapped_segments_cache = {}
end

Instance Method Details

#current_window_view_height(editor) ⇒ Object 



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# File 'lib/ruvim/screen.rb', line 82

def current_window_view_height(editor)
  rows, cols = @terminal.winsize
  text_rows, text_cols = editor.text_viewport_size(rows:, cols:)
  text_rows = [text_rows, 1].max
  text_cols = [text_cols, 1].max
  rect = window_rects(editor, text_rows:, text_cols:)[editor.current_window_id]
  height = [rect ? rect[:height] : text_rows, 1].max
  editor.current_window_view_height_hint = height if editor.respond_to?(:current_window_view_height_hint=)
  height
rescue StandardError
  1
end

#invalidate_cache! ⇒ Object 



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# File 'lib/ruvim/screen.rb', line 15

def invalidate_cache!
  @last_frame = nil
end

#render(editor) ⇒ Object 



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# File 'lib/ruvim/screen.rb', line 19

def render(editor)
  @rich_render_info = nil

  rows, cols = @terminal.winsize
  text_rows, text_cols = editor.text_viewport_size(rows:, cols:)
  text_rows = [text_rows, 1].max
  text_cols = [text_cols, 1].max

  rects = window_rects(editor, text_rows:, text_cols:)
  if (current_rect = rects[editor.current_window_id])
    editor.current_window_view_height_hint = [current_rect[:height], 1].max
  end
  editor.window_order.each do |win_id|
    win = editor.windows.fetch(win_id)
    buf = editor.buffers.fetch(win.buffer_id)
    rect = rects[win_id]
    next unless rect
    content_width = [rect[:width] - number_column_width(editor, win, buf), 1].max
    if RuVim::RichView.active?(editor)
      # Vertical scrolling only — keep raw col_offset untouched
      win.ensure_visible(
        buf,
        height: [rect[:height], 1].max,
        width: content_width,
        tabstop: tabstop_for(editor, win, buf),
        scrolloff: editor.effective_option("scrolloff", window: win, buffer: buf),
        sidescrolloff: editor.effective_option("sidescrolloff", window: win, buffer: buf)
      )
      ensure_visible_rich(editor, win, buf, rect, content_width)
    else
      win.col_offset = 0 if wrap_enabled?(editor, win, buf)
      win.ensure_visible(
        buf,
        height: [rect[:height], 1].max,
        width: content_width,
        tabstop: tabstop_for(editor, win, buf),
        scrolloff: editor.effective_option("scrolloff", window: win, buffer: buf),
        sidescrolloff: editor.effective_option("sidescrolloff", window: win, buffer: buf)
      )
      if wrap_enabled?(editor, win, buf)
        ensure_visible_under_wrap(editor, win, buf, height: [rect[:height], 1].max, content_w: content_width)
      end
    end
  end

  frame = build_frame(editor, rows:, cols:, text_rows:, text_cols:, rects:)
  out = if can_diff_render?(frame)
          render_diff(frame)
        else
          render_full(frame)
        end
  cursor_row, cursor_col = cursor_screen_position(editor, text_rows, rects)
  out << "\e[#{cursor_row};#{cursor_col}H"
  if cursor_use_terminal?(editor)
    out << "\e[6 q"
    out << "\e[?25h"
  else
    out << "\e[?25l"
  end
  @last_frame = frame.merge(cursor_row:, cursor_col:)
  @terminal.write(out)
end