Class: PDF::QuickRef

Inherits:
Object show all
Defined in:
lib/extensions/pdf-writer/pdf/quickref.rb

Overview

QuickRef

A formatting language to create a quick reference sheet. This is a multi-column page in landscape mode that generally has three or four columns. This format may also be used for brochures, but brochure creation requires a bit of management to create properly.

Reference Sheets

A three-column reference sheet is generally in the form of:

Page 1:

column 1 | column 2 | column 3

Page 2:

column 4 | column 5 | column 6

The formatting language provided in QuickRef is based around this text flow. The title of the quick reference sheet is in column 1. The two pages are intended to be printed on both sides of pieces of paper so that columns 1 and 6 are matched. This will use a Z-fold that places columns 5 and 6 face to face and columns 2 and 3 face to face. In the folded reference sheet, columns 1 and 4 will be facing out.

Brochures

In contrast, brochures differ vastly in their design, although the common brochure is also three columns and either follows the same layout as a reference sheet or uses an overlapping fold.

When an overlapping fold is used, the title is typically on column 6 (assuming a left-to-right reading order). A short summary will appear on column 4. Contact information about the maker of the brochure is typically in column 5. Columns 1, 2, and 3 will contain the main body of the brochure. The brochure will be folded so that columns 2 and 3 are face to face. After this, column 1 will face column 4 (exposed by the first fold). In the folded brochure, columns 5 and 6 are facing out.

Usage

qr = PDF::QuickRef.new # 3-column LETTER
qr.title "My QuickRef"
qr.h1 "H1 Text"
qr.lines "Text to put after the header."
qr.save_as "MyQuickRef.pdf"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(paper = "LETTER", columns = 3, column_separators_visible = true) {|_self| ... } ⇒ QuickRef

Create the quick reference document. paper is passed unchanged to the PDF::Writer.new; the page is always created landscape. Margins are initialized to 18 points. After some additional initialization is performed, the quick reference document is yielded to an optional block for further configuration. All of this is done before the columns are started.

After the columns are started, lines will be drawn between column positions.

Yields:

  • (_self)

Yield Parameters:

  • _self (PDF::QuickRef) —

    the object that the method was called on



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 64

def initialize(paper = "LETTER", columns = 3, column_separators_visible = true)
  @pdf  = PDF::Writer.new(:paper => paper, :orientation => :landscape)
  @pdf.margins_pt 18
  @pdf.y = @pdf.absolute_top_margin

  @title_font       = "Times-Roman"
  @heading_font     = "Times-Roman"
  @body_font        = "Times-Roman"
  @code_font        = "Courier"
  @title_font_size = 14
  @h1_font_size    = 11
  @h2_font_size    =  9
  @h3_font_size    =  8
  @h4_font_size    =  7
  @body_font_size  =  6

  @ptab = PDF::SimpleTable.new do |tab|
    tab.column_order.replace %w(one two)

    tab.font_size     = @body_font_size
    tab.show_lines    = :none
    tab.show_headings = false
    tab.orientation   = :center
    tab.position      = :center
  end
  @ltab = PDF::SimpleTable.new do |tab|
    tab.column_order.replace %w(line)

    tab.font_size     = @body_font_size
    tab.show_lines    = :none
    tab.show_headings = false
    tab.orientation   = :center
    tab.position      = :center
  end

  yield self if block_given?

  @pdf.start_columns columns

  @ptab.font_size = @body_font_size
  @ltab.font_size = @body_font_size

  @ptab.maximum_width = @pdf.column_width - 10
  @ltab.maximum_width = @pdf.column_width - 10

  if column_separators_visible
    # Put lines between the columns.
    all = @pdf.open_object
    @pdf.save_state
    @pdf.stroke_color! Color::RGB::Black
    @pdf.stroke_style  PDF::Writer::StrokeStyle::DEFAULT
    (1 .. (columns - 1)).each do |ii|
      x = @pdf.left_margin + (@pdf.column_width * ii)
      x += (@pdf.column_gutter * (ii - 0.5))
      @pdf.line(x, @pdf.page_height - @pdf.top_margin, x, @pdf.bottom_margin)
      @pdf.stroke
    end
    @pdf.restore_state
    @pdf.close_object
    @pdf.add_object(all, :all_pages)
  end
end

Instance Attribute Details

#body_font ⇒ Object

The name of the font that will be used for #body, #lines, and #pairs text. The default is ‘Times-Roman’.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 154

def body_font
  @body_font
end

#body_font_encoding ⇒ Object

The font encoding for #body, #lines, and #pairs text.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 156

def body_font_encoding
  @body_font_encoding
end

#body_font_size ⇒ Object

The size #body and #code text. The default is 7 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 164

def body_font_size
  @body_font_size
end

#code_font ⇒ Object

The name of the font that will be used for #code, #codelines, and #codepairs text; this is generally a fixed-pitch font. The default is ‘Courier’.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 160

def code_font
  @code_font
end

#code_font_encoding ⇒ Object

The font encoding for #code, #codelines, and #codepairs text.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 162

def code_font_encoding
  @code_font_encoding
end

#h1_font_size ⇒ Object

The size #h1 text. The default is 11 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 144

def h1_font_size
  @h1_font_size
end

#h2_font_size ⇒ Object

The size #h2 text. The default is 9 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 146

def h2_font_size
  @h2_font_size
end

#h3_font_size ⇒ Object

The size #h3 text. The default is 8 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 148

def h3_font_size
  @h3_font_size
end

#h4_font_size ⇒ Object

The size #h4 text. The default is 7 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 150

def h4_font_size
  @h4_font_size
end

#heading_font ⇒ Object

The name of the font that will be used for #h1, #h2, #h3, and #h4 text. The default is Times-Roman.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 140

def heading_font
  @heading_font
end

#heading_font_encoding ⇒ Object

The font encoding for #h1, #h2, #h3, and #h4 text.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 142

def heading_font_encoding
  @heading_font_encoding
end

#pdf ⇒ Object (readonly)

Access to the raw PDF canvas for normal PDF::Writer configuration.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 128

def pdf
  @pdf
end

#title_font ⇒ Object

The name of the font that will be used for #title text. The default font is Times-Roman.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 132

def title_font
  @title_font
end

#title_font_encoding ⇒ Object

The font encoding for #title text.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 134

def title_font_encoding
  @title_font_encoding
end

#title_font_size ⇒ Object

The size #title text. The default is 14 points.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 136

def title_font_size
  @title_font_size
end

Class Method Details

.make(*args, &block) ⇒ Object

Creates a QuickRef document and then calls #instance_eval on the document. This allows for a more natural use of the QuickRef class as a DSL for creating these documents.

Using #make

PDF::QuickRef.make do # 3-column LETTER
  title "My QuickRef"
  h1 "H1 Text"
  lines "Text to put after the header."
  save_as "MyQuickRef.pdf"
end



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 328

def self.make(*args, &block)
  qr = PDF::QuickRef.new(*args)
  qr.__send__(:instance_eval, &block)
end

Instance Method Details

#body(text) ⇒ Object

Writes body text. Paragraphs will be reflowed for optimal placement of text. Text separated by two line separators (e.g., nn, although the separator is platform dependent). The text will be placed with full justification.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 275

def body(text)
    # Transform the text a little.
  paras = text.split(%r(#{$/}{2}))
  paras.map! { |para| para.split($/).join(" ").squeeze(" ") }
  text = paras.join("\n\n")

  @pdf.text "#{text}\n", :font_size => @body_font_size, :justification => :full
end

#codelines(text) ⇒ Object

Creates a one-column zebra-striped table using the #code font. Each line of the text is a separate row.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 202

def codelines(text)
  data = text.split($/).map { |line| { "line" => line } }
  @ltab.data.replace data
  use_code_font
  @ltab.render_on(@pdf)
  use_body_font
  @pdf.text "\n", :font_size => @body_font_size
end

#codepairs(text) ⇒ Object

Creates a two-column zebra-striped table using the #code font. Each line of the text is a separate row; the two columns are separated by tab characters.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 181

def codepairs(text)
  data = text.split($/).map do |line|
    one, two = line.split(/\t/)
    { 'one' => one, 'two' => two }
  end
  @ptab.data.replace data
  use_code_font
  @ptab.render_on(@pdf)
  use_body_font
  @pdf.text "\n", :font_size => @body_font_size
end

#h1(text) ⇒ Object

Writes the text with the #heading_font and #h1_font_size left justified in the column. The font is set to #body_font after the heading is drawn.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 242

def h1(text)
  use_heading_font
  @pdf.text text, :font_size => @h1_font_size
  use_body_font
end

#h2(text) ⇒ Object

Writes the text with the #heading_font and #h2_font_size left justified in the column. The font is set to #body_font after the heading is drawn.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 250

def h2(text)
  use_heading_font
  @pdf.text "<i>#{text}</i>", :font_size => @h2_font_size
  use_body_font
end

#h3(text) ⇒ Object

Writes the text with the #heading_font and #h3_font_size left justified in the column. The font is set to #body_font after the heading is drawn.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 258

def h3(text)
  use_heading_font
  @pdf.text "<i>#{text}</i>", :font_size => @h3_font_size
  use_body_font
end

#h4(text) ⇒ Object

Writes the text with the #heading_font and #h4_font_size left justified in the column. The font is set to #body_font after the heading is drawn.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 266

def h4(text)
  use_heading_font
  @pdf.text "<b><i>#{text}</i></b>", :font_size => @h4_font_size
  use_body_font
end

#hline(style = PDF::Writer::StrokeStyle::DEFAULT, color = Color::RGB::Black) ⇒ Object

Draws a horizontal line with the specified style and colour.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 291

def hline(style = PDF::Writer::StrokeStyle::DEFAULT,
          color = Color::RGB::Black)
  @pdf.y -= 2.5
  @pdf.save_state
  @pdf.stroke_style  style
  @pdf.stroke_color! color
  x0 = @pdf.left_margin
  x1 = @pdf.left_margin + pdf.column_width
  @pdf.line(x0, @pdf.y, x1, @pdf.y)
  @pdf.stroke
  @pdf.restore_state
  @pdf.y -= 2.5
end

#lines(text) ⇒ Object

Creates a one-column zebra-striped table using the #body font. Each line of the text is a separate row.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 194

def lines(text)
  data = text.split($/).map { |line| { "line" => line } }
  @ltab.data.replace data
  @ltab.render_on(@pdf)
  @pdf.text "\n", :font_size => @body_font_size
end

#pairs(text) ⇒ Object

Creates a two-column zebra-striped table using the #body font. Each line of the text is a separate row; the two columns are separated by tab characters.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 169

def pairs(text)
  data = text.split($/).map do |line|
    one, two = line.split(/\t/)
    { 'one' => one, 'two' => two }
  end
  @ptab.data.replace data
  @ptab.render_on(@pdf)
  @pdf.text "\n", :font_size => @body_font_size
end

#pre(text) ⇒ Object

Writes code text. Newlines and spaces will be preserved.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 284

def pre(text)
  use_code_font
  @pdf.text "#{text}\n", :font_size => @body_font_size
  use_body_font
end

#render ⇒ Object Also known as: to_s

Generates the PDF document as a string.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 311

def render
  @pdf.render
end

#save_as(filename) ⇒ Object

Writes the Quick Reference to disk.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 306

def save_as(filename)
  @pdf.save_as(filename)
end

#title(text) ⇒ Object

Writes the text with the #title_font and #title_font_size centered in the column. After the title has been written, an #hline will be drawn under the title. The font is set to #body_font after the title is drawn.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 233

def title(text)
  use_title_font
  @pdf.text text, :font_size => @title_font_size, :justification => :center
  use_body_font
  hline
end

#use_body_font ⇒ Object

Change the current font to the #body font.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 221

def use_body_font
  @pdf.select_font @body_font, @body_font_encoding
end

#use_code_font ⇒ Object

Change the current font to the #code font.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 225

def use_code_font
  @pdf.select_font @code_font, @code_font_encoding
end

#use_heading_font ⇒ Object

Change the current font to the heading font (used normally by #h1, #h2, #h3, and #h4|).



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 217

def use_heading_font
  @pdf.select_font @heading_font, @heading_font_encoding
end

#use_title_font ⇒ Object

Change the current font to the #title font.



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# File 'lib/extensions/pdf-writer/pdf/quickref.rb', line 212

def use_title_font
  @pdf.select_font @title_font, @title_font_encoding
end