Module: RuVim::RichView::MarkdownRenderer

Defined in:
lib/ruvim/rich_view/markdown_renderer.rb

Constant Summary collapse

HEADING_STYLES =

--- Heading rendering ---

Lang::Markdown::HEADING_COLORS

Class Method Summary collapse

Class Method Details

.apply_inline(line) ⇒ Object

--- Inline decoration ---



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 107

def apply_inline(line)
  result = line.to_s.dup

  # Checkbox (must come before bold/italic to avoid interference)
  result = result.gsub(Lang::Markdown::CHECKBOX_CHECKED_RE) { "#{$1}\e[32m[x]\e[m" }
  result = result.gsub(Lang::Markdown::CHECKBOX_UNCHECKED_RE) { "#{$1}\e[90m[ ]\e[m" }

  # Bold **text**
  result = result.gsub(Lang::Markdown::BOLD_RE) { "\e[1m**#{$1}**\e[22m" }

  # Italic *text* (but not ** which is bold)
  result = result.gsub(Lang::Markdown::ITALIC_RE) { "\e[3m*#{$1}*\e[23m" }

  # Inline code `text`
  result = result.gsub(Lang::Markdown::INLINE_CODE_RE) { "\e[33m`#{$1}`\e[m" }

  # Links [text](url)
  result = result.gsub(Lang::Markdown::LINK_RE) { "\e[4m#{$1}\e[24m(\e[2m#{$2}\e[22m)" }

  result
end

.build_table_group(table_lines) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 151

def build_table_group(table_lines)
  return nil if table_lines.nil? || table_lines.empty?

  cells = table_lines.map { |l| Lang::Markdown.parse_table_cells(l) }
  max_cols = cells.map(&:length).max
  return nil if max_cols.nil? || max_cols.zero?

  col_widths = Array.new(max_cols, 0)
  cells.each do |row|
    row.each_with_index do |cell, ci|
      w = RuVim::DisplayWidth.display_width(cell)
      col_widths[ci] = w if w > col_widths[ci]
    end
  end

  { col_widths: col_widths, max_cols: max_cols }
end

.cursor_display_col(raw_line, cursor_x, visible_lines:, delimiter:) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 35

def cursor_display_col(raw_line, cursor_x, visible_lines:, delimiter:)
  if Lang::Markdown.table_line?(raw_line)
    table_lines = visible_lines.select { |l| Lang::Markdown.table_line?(l) }
    group = build_table_group(table_lines)
    if group
      return table_cursor_display_col(raw_line, cursor_x, group)
    end
  end
  RuVim::TextMetrics.screen_col_for_char_index(raw_line, cursor_x)
end

.delimiter_for(_format) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 8

def delimiter_for(_format)
  nil
end

.identify_table_groups(lines) ⇒ Object

--- Table rendering ---



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 131

def identify_table_groups(lines)
  groups = {}
  i = 0
  while i < lines.length
    if Lang::Markdown.table_line?(lines[i])
      start = i
      table_lines = []
      while i < lines.length && Lang::Markdown.table_line?(lines[i])
        table_lines << lines[i]
        i += 1
      end
      group = build_table_group(table_lines)
      (start...(start + table_lines.length)).each { |j| groups[j] = group }
    else
      i += 1
    end
  end
  groups
end

.needs_pre_context? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 12

def needs_pre_context?
  true
end

.pad_cell(cell, target_width) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 197

def pad_cell(cell, target_width)
  current = RuVim::DisplayWidth.display_width(cell)
  gap = target_width - current
  gap > 0 ? "#{cell}#{" " * gap}" : cell
end

.render_heading(line, level) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 92

def render_heading(line, level)
  style = HEADING_STYLES[level] || HEADING_STYLES[6]
  "#{style}#{line}\e[m"
end

.render_hr(line) ⇒ Object

--- HR rendering ---



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 99

def render_hr(line)
  # Replace the HR marker with box-drawing horizontal line
  width = [line.length, 3].max
  "\e[90m#{"─" * width}\e[m"
end

.render_line(line, state, table_group) ⇒ Object

--- Line rendering ---



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 48

def render_line(line, state, table_group)
  stripped = line.to_s.strip

  # Code fence open/close
  if !state.in_code_block && Lang::Markdown.fence_line?(stripped)
    return "\e[90m#{line}\e[m"
  end

  if state.in_code_block
    if Lang::Markdown.fence_line?(stripped)
      return "\e[90m#{line}\e[m"
    end
    return "\e[38;5;223m#{line}\e[m"
  end

  # HR
  if Lang::Markdown.horizontal_rule?(stripped)
    return render_hr(line)
  end

  # Heading
  level = Lang::Markdown.heading_level(line)
  if level > 0
    return render_heading(line, level)
  end

  # Block quote
  if Lang::Markdown.block_quote?(line)
    return "\e[36m#{apply_inline(line)}\e[m"
  end

  # Table
  if table_group
    return render_table_line(line, stripped, table_group)
  end

  # Default: inline decoration only
  apply_inline(line)
end

.render_table_data_row(line, group) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 183

def render_table_data_row(line, group)
  col_widths = group[:col_widths]
  cells = Lang::Markdown.parse_table_cells(line)
  padded = cells.each_with_index.map do |cell, i|
    target = col_widths[i] || 0
    pad_cell(cell, target)
  end
  # Fill missing columns
  (cells.length...group[:max_cols]).each do |i|
    padded << " " * (col_widths[i] || 0)
  end
  "│ #{padded.join(" │ ")} │"
end

.render_table_line(line, stripped, group) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 169

def render_table_line(line, stripped, group)
  if Lang::Markdown.table_separator?(stripped)
    render_table_separator(group)
  else
    render_table_data_row(line, group)
  end
end

.render_table_separator(group) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 177

def render_table_separator(group)
  col_widths = group[:col_widths]
  cells = col_widths.map { |w| "─" * (w + 2) }
  "├#{cells.join("┼")}┤"
end

.render_visible(lines, delimiter:, context: {}) ⇒ Object 



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 16

def render_visible(lines, delimiter:, context: {})
  return lines if lines.nil? || lines.empty?

  state = Lang::Markdown::FenceState.new
  pre = context[:pre_context_lines]
  if pre
    pre.each { |l| state.scan_line(l) }
  end

  # Identify table groups for column-width alignment
  table_groups = identify_table_groups(lines)

  lines.each_with_index.map do |line, idx|
    rendered = render_line(line, state, table_groups[idx])
    state.scan_line(line)
    rendered
  end
end

.table_cursor_display_col(raw_line, cursor_x, group) ⇒ Object

--- Table cursor mapping ---



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# File 'lib/ruvim/rich_view/markdown_renderer.rb', line 205

def table_cursor_display_col(raw_line, cursor_x, group)
  col_widths = group[:col_widths]
  cells = Lang::Markdown.parse_table_cells(raw_line)

  # Map cursor_x (in raw line) to display col in formatted line
  # Raw line: "| cell1 | cell2 |"
  # Formatted: "│ cell1  │ cell2  │"

  # Walk through the raw line to find which cell cursor_x is in
  pos = 0
  raw = raw_line.to_s
  # Skip leading whitespace
  pos += 1 while pos < raw.length && raw[pos] == " "
  # Skip leading |
  pos += 1 if pos < raw.length && raw[pos] == "|"

  display_col = 2  # "│ " prefix
  cells.each_with_index do |cell, ci|
    # Skip whitespace before cell content
    pos += 1 while pos < raw.length && raw[pos] == " "

    cell_start = pos
    cell_end = cell_start + cell.length

    if cursor_x < cell_end || ci == cells.length - 1
      # Cursor is in this cell
      offset_in_cell = [cursor_x - cell_start, 0].max
      offset_in_cell = [offset_in_cell, cell.length].min
      return display_col + RuVim::DisplayWidth.display_width(cell[0...offset_in_cell])
    end

    display_col += (col_widths[ci] || 0) + 3  # " │ "
    pos = cell_end
    # Skip whitespace after cell
    pos += 1 while pos < raw.length && raw[pos] == " "
    # Skip |
    pos += 1 if pos < raw.length && raw[pos] == "|"
  end

  display_col
end