Module: MotionPrime::ElementTextMixin

Included in:
ElementContentTextMixin, LabelDrawElement, LabelElement, ViewStyler
Defined in:
motion-prime/elements/_text_mixin.rb

Instance Method Summary collapse

Instance Method Details

#attributed_string(options) ⇒ Object 



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# File 'motion-prime/elements/_text_mixin.rb', line 31

def attributed_string(options)
  attributes, paragrah_style = extract_attributed_string_options(options)

  prepared_text = NSMutableAttributedString.alloc.initWithString(options[:text].to_s, attributes: attributes)
  underline_range = options[:underline]
  fragment_color = options[:fragment_color]
  fragment_font = options[:fragment_font]
  if paragrah_style && (underline_range || fragment_color) && options.fetch(:number_of_lines, 1) == 1
    Prime.logger.debug "If attributed text has paragraph style and underline - you must set number of lines != 1"
  end

  if underline_range
    underline_range = [0, options[:text].length] if underline_range === true
    prepared_text.addAttributes({NSUnderlineStyleAttributeName => NSUnderlineStyleSingle}, range: underline_range)
  end
  if fragment_color
    prepared_text.addAttributes({NSForegroundColorAttributeName => fragment_color[:color].uicolor}, range: fragment_color[:range])
  end
  if fragment_font
    prepared_text.addAttributes({NSFontAttributeName => fragment_font[:font].uifont}, range: fragment_font[:range])
  end

  prepared_text
end

#extract_attributed_string_options(options) ⇒ Object 



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# File 'motion-prime/elements/_text_mixin.rb', line 56

def extract_attributed_string_options(options)
  attributes = {}
  line_height = options[:line_height]
  line_spacing = options[:line_spacing]
  text_alignment = options[:text_alignment]
  line_break_mode = options[:line_break_mode]

  if line_height || line_spacing || text_alignment || line_break_mode
    paragrah_style = NSMutableParagraphStyle.alloc.init
    if line_height
      paragrah_style.setMinimumLineHeight(line_height)
    elsif line_spacing
      paragrah_style.setLineSpacing(line_spacing)
    end
    if text_alignment
      text_alignment = text_alignment.nstextalignment if text_alignment.is_a?(Symbol)
      paragrah_style.setAlignment(text_alignment)
    end
    if line_break_mode
      line_break_mode = line_break_mode.uilinebreakmode if line_break_mode.is_a?(Symbol)
      paragrah_style.setLineBreakMode(line_break_mode)
    end
    attributes[NSParagraphStyleAttributeName] = paragrah_style
  end
  if color = options[:text_color] || options[:title_color]
    attributes[NSForegroundColorAttributeName] = color.uicolor
  end
  if font = extract_font_from(options)
    attributes[NSFontAttributeName] = font.uifont
  end
  [attributes, paragrah_style]
end

#html_string(options) ⇒ Object

Options text text_color font line_spacing text_alignment text_alignment_name line_break_mode underline (range)



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# File 'motion-prime/elements/_text_mixin.rb', line 13

def html_string(options)
  styles = []
  styles << "color: #{options[:text_color].hex};" if options[:text_color]
  styles << "line-height: #{options[:line_height] || (options[:line_spacing].to_f + options[:font].pointSize)}px;"
  styles << "font-family: '#{options[:font].familyName}';"
  styles << "font-size: #{options[:font].pointSize}px;"
  styles << "text-align: #{options[:text_alignment_name]};" if options[:text_alignment_name]

  html_options = {
    NSDocumentTypeDocumentAttribute => NSHTMLTextDocumentType,
    NSCharacterEncodingDocumentAttribute => NSNumber.numberWithInt(NSUTF8StringEncoding)
  }

  text = "#{options[:text]}<style>* { #{styles.join} }</style>"
  # WARNING: there is a bug - it uses WebKit and can not be used in secondary threads
  NSAttributedString.alloc.initWithData(text.dataUsingEncoding(NSUTF8StringEncoding), options: html_options, documentAttributes: nil, error: nil)
end