# encoding: utf-8

# WizRft:  A gem for exporting Word Documents in ruby
# using the Microsoft Rich Text Format (RTF) Specification
# Copyright (C) 2015 by sgzhe@163.com

module WizRtf

  # = Represents Rtf text.
  class Text
    TEXT_ALIGN_MAP = {left:'ql',center:'qc',right:'qr'}

    # creates a text of +str+ to the document.
    # == Styles:
    # * +text-align+ - sets the horizontal alignment of the text. optional values: +:left+, +:center+, +:right+
    # * +font-family+ - set the font family of the text. optional values: 'Arial', 'Arial Black', 'Arial Narrow','Bitstream Vera Sans Mono',
    #                   'Bitstream Vera Sans','Bitstream Vera Serif','Book Antiqua','Bookman Old Style','Castellar','Century Gothic',
    #                   'Comic Sans MS','Courier New','Franklin Gothic Medium','Garamond','Georgia','Haettenschweiler','Impact','Lucida Console'
    #                   'Lucida Sans Unicode','Microsoft Sans Serif','Monotype Corsiva','Palatino Linotype','Papyrus','Sylfaen','Symbol'
    #                   'Tahoma','Times New Roman','Trebuchet MS','Verdana'.
    # * +font-size+ - set font size of the text.
    # * +font-bold+ - setting the value true for bold of the text.
    # * +font-italic+ - setting the value true for italic of the text.
    # * +font-underline+ - setting the value true for underline of the text.
    # == Example:
    #
    # WizRtf::Text.new("A Example of Rtf Document", 'text-align' => :center, 'font-family' => 'Microsoft YaHei', 'font-size' => 48, 'font-bold' => true, 'font-italic' => true, 'font-underline' => true)
    #
    def initialize(str = '', styles = {})
      @str = str
      @styles = {'text-align' => :left, 'font-family' => 0, 'font-size' => 12, 'font-bold' => false, 'font-italic' => false, 'font-underline' => false, 'foreground-color' => 0, 'background-color' => 0 }.merge(styles)
    end

    # Outputs the Partial Rtf Document to a Generic Stream as a Rich Text Format (RTF).
    # * +io+ - The Generic IO to Output the RTF Document.
    def render(io)
      io.group do
        io.cmd :pard
        io.cmd TEXT_ALIGN_MAP[@styles['text-align']]
        io.cmd :f, @styles['font-family']
        io.cmd :fs, @styles['font-size'] * 2
        io.cmd @styles['font-bold'] ? 'b' : 'b0'
        io.cmd @styles['font-italic'] ? 'i' : 'i0'
        io.cmd @styles['font-underline'] ? 'ul' : 'ulnone'
        io.cmd :cf, @styles['foreground-color']
        io.cmd :cb, @styles['background-color']
        io.cmd :chcfpat, @styles['foreground-color']
        io.cmd :chcbpat, @styles['background-color']
        io.txt @str
        io.cmd :par
      end
    end
  end
end