class Magick::RVG::Utility::TextAttributes

def affine
  @affine[-1]
end

def baseline_shift
  @baseline_shift[-1]
end

def baseline_shift=(value)
  @baseline_shift[-1] = value
end

def glyph_orientation_horizontal
  @glyph_orientation_horizontal[-1]
end

def glyph_orientation_horizontal=(angle)
  @glyph_orientation_horizontal[-1] = angle
end

def glyph_orientation_vertical
  @glyph_orientation_vertical[-1]
end

def glyph_orientation_vertical=(angle)
  @glyph_orientation_vertical[-1] = angle
end

def initialize
  @affine = []
  @affine << Magick::AffineMatrix.new(1, 0, 0, 1, 0, 0)
  @baseline_shift = []
  @baseline_shift << :baseline
  @glyph_orientation_horizontal = []
  @glyph_orientation_horizontal << 0
  @glyph_orientation_vertical = []
  @glyph_orientation_vertical << 90
  @letter_spacing = []
  @letter_spacing << 0
  @text_anchor = []
  @text_anchor << :start
  @word_spacing = []
  @word_spacing << 0
  @writing_mode = []
  @writing_mode << 'lr-tb'
end

def letter_spacing
  @letter_spacing[-1]
end

def letter_spacing=(value)
  @letter_spacing[-1] = value
end

def non_default?
  @baseline_shift[-1] != :baseline || @letter_spacing[-1] != 0 ||
    @word_spacing[-1] != 0 || @writing_mode[-1][/\Alr/].nil? ||
    @glyph_orientation_horizontal[-1] != 0
end

def pop
  @affine.pop
  @baseline_shift.pop
  @text_anchor.pop
  @writing_mode.pop
  @glyph_orientation_vertical.pop
  @glyph_orientation_horizontal.pop
  @letter_spacing.pop
  @word_spacing.pop
end

def push
  @affine.push(@affine.last.dup)
  @baseline_shift.push(@baseline_shift.last)
  @text_anchor.push(@text_anchor.last)
  @writing_mode.push(@writing_mode.last.dup)
  @glyph_orientation_vertical.push(@glyph_orientation_vertical.last)
  @glyph_orientation_horizontal.push(@glyph_orientation_horizontal.last)
  @letter_spacing.push(@letter_spacing.last)
  @word_spacing.push(@word_spacing.last)
end

def set_affine(sx, rx, ry, sy, tx, ty)
  @affine[-1].sx = sx
  @affine[-1].rx = rx
  @affine[-1].ry = ry
  @affine[-1].sy = sy
  @affine[-1].tx = tx
  @affine[-1].ty = ty
end

def text_anchor
  @text_anchor[-1]
end

def text_anchor=(anchor)
  @text_anchor[-1] = anchor
end

def word_spacing
  @word_spacing[-1]
end

def word_spacing=(value)
  @word_spacing[-1] = value
end

def writing_mode
  @writing_mode[-1]
end

def writing_mode=(mode)
  @writing_mode[-1] = WRITING_MODE.include?(mode) ? mode : 'lr-tb'
end