markdown Ruby打印PDF文档，类似python的Reportlab数学考试计算题

Posted 2021-05-06

see also:
[使用Python打印小学计算题脚本](https://gist.github.com/foxlog/e26f2508d8c3bb33ac845b72bad7f6c3)
[用jxls 通过ExcelExcel模板导出数据](https://gist.github.com/foxlog/30a0f32bf2a94f40c3c0872445c343f6)

---

## 本地解决中文字体,Table的问题,

```ruby
# 小学生口算题打印

require 'prawn'
require 'prawn/table'


USER_PATH = File.expand_path("~#{ENV['USER']}")
a = 0
b = 0
c = 0
def _getRuleOne()
  a = rand(10..70)
  b = rand(10..70)
  while a + b>=100
    a = rand(10..70)
    b = rand(10..70)
  end

  return "%2d + %2d =" % [a, b]

end

def _getRuleThree()
  a = rand(10..70)
  b = rand(10..70)
  while a - b<=0
    a = rand(10..70)
    b = rand(10..70)
  end

  return "%2d - %2d =" % [a, b]

end

def _getRuleTwo()
  a = rand(10..70)
  b = rand(2..9)
  c = rand(3..9)
  while a + b*c >=100
    a = rand(10..70)
    b = rand(2..9)
    c = rand(3..9)
  end

  return "%2d + %1d x %1d =" % [a, b, c]

end

def _getRuleFour()
  a = rand(10..70)
  b = rand(3..9)
  c = rand(2..9)
  while a - b*c <=0
    a = rand(10..70)
    b = rand(3..9)
    c = rand(2..9)
  end

  return "%2d - %1d x %1d =" % [a, b, c]

end

def getAllData()
  resultOne = []
  resultTwo = []
  resultThree = []
  resultFour = []
  for i in 0..15
    resultOne.push(_getRuleOne())
    resultTwo.push(_getRuleTwo())
    resultThree.push(_getRuleThree())
    resultFour.push(_getRuleFour())
  end

  return resultOne.zip(resultTwo).zip(resultThree).zip(resultFour).flatten.each_slice(4).to_a
end

# Assignment
pdf = Prawn::Document.new :left_margin => 80



#pdf.text "口算测验  姓名          班级          得分          " , :align => :center

# 通过 :inline_format需要font family
pdf.font_families.update("Microsoft YaHei" => {
    :normal => USER_PATH + "/Library/Fonts/msyh.ttf",
    #:italic => "/Library/Fonts/Arial Italic.ttf",
    :bold => USER_PATH + "/Library/Fonts/msyhbd.ttf",
    #:bold_italic => "/Library/Fonts/Arial Bold Italic.ttf"
})

pdf.font "Microsoft YaHei"


# HTML方式不支持多个字体设置,需要用formatted_text
#pdf.text "<font size=1> <b>口算测验</b></font>  <font size=16> 姓名         班级          得分</font> " , :inline_format => true, :align => :center

## 在同一行不同的字体设置,使用formatted_text
pdf.formatted_text [{:text => "口算测验", :size => 30, :styles => [:bold]},{text: "   姓名____________班级__________得分_________" , :size => 18}]

pdf.move_down(50)


data = getAllData()
pdf.font_size = 12

pdf.table data,
          :header => true,
          :column_widths => 120, ## 每一列的宽度

          :cell_style => {
              #:size => 15,
                           #:text_color => "346842",
                           :border_width => 0} ## 这里控制table的font size
          ##:row_colors => ["EEEEEE", "FFFFFF"] ## 控制隔行颜色

pdf.move_down(20)


pdf.render_file "/tmp/口算测验.pdf"


```