Module: ThumbGen::Utils

Included in:
Generator
Defined in:
lib/thumb_gen/utils.rb

Instance Method Summary collapse

Instance Method Details

#draw_text(image, text, **opts) ⇒ Object

Draws customized text on an image.



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# File 'lib/thumb_gen/utils.rb', line 6

def draw_text(image, text, **opts)
  draw = Magick::Draw.new
  draw.font = opts[:font]
  draw.font_weight = opts[:font_weight]
  draw.font_style = opts[:font_style]
  draw.pointsize = opts[:font_size]
  draw.fill = opts[:color]
  draw.gravity = opts[:gravity]
  if opts[:outline_width].to_i.positive?
    draw.stroke = opts[:outline_color]
    draw.stroke_width = opts[:outline_width]
  end

  wrapped_text = word_wrap(text, opts[:wrapped_width], draw)

  draw.annotate(
    image,
    0,
    0,
    opts[:position_x],
    opts[:position_y],
    wrapped_text
  )
end

#split_word_into_lines(word, max_width, draw) ⇒ Object

Splits a single word into lines if it’s too wide to fit the max width.



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# File 'lib/thumb_gen/utils.rb', line 60

def split_word_into_lines(word, max_width, draw)
  word.each_char.with_object(['']) do |char, segments|
    test_segment = segments.last + char
    if word_too_wide?(test_segment, max_width, draw)
      segments << char
    else
      segments[-1] = test_segment
    end
  end
end

#word_too_wide?(text, max_width, draw) ⇒ Boolean

Helper method to determine if the text exceeds the maximum width.

Returns:

  • (Boolean) 


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# File 'lib/thumb_gen/utils.rb', line 55

def word_too_wide?(text, max_width, draw)
  draw.get_type_metrics(text).width > max_width
end

#word_wrap(text, max_width, draw) ⇒ Object

Wraps text to fit within a specified width.



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# File 'lib/thumb_gen/utils.rb', line 32

def word_wrap(text, max_width, draw)
  lines = []
  current_line = ''

  text.split.each do |word|
    if word_too_wide?(word, max_width, draw)
      lines.concat(split_word_into_lines(word, max_width, draw))
    else
      test_line = current_line.empty? ? word : "#{current_line} #{word}"
      if word_too_wide?(test_line, max_width, draw)
        lines << current_line
        current_line = word
      else
        current_line = test_line
      end
    end
  end

  lines << current_line unless current_line.empty?
  lines.join("\n")
end