# frozen_string_literal: true

require_relative 'spec_helper'

describe 'Asciidoctor::PDF::Converter - Break' do
  context 'Line Breaks' do
    it 'should place text on separate line after explicit line break' do
      pdf = to_pdf <<~'END', analyze: true
      foo +
      bar +
      baz
      END

      (expect pdf.lines).to eql %w(foo bar baz)
    end

    it 'should preserve inner empty lines that end with hard line break' do
      pdf = to_pdf <<~'END', analyze: true
      foo +
      filler +
      filler +
      filler +

      bar
      END

      expected_gap = ((pdf.find_unique_text 'foo')[:y] - (pdf.find_unique_text 'bar')[:y]).round 4

      pdf = to_pdf <<~'END', analyze: true
      foo +
      {empty} +
      {empty} +
      {empty} +

      bar
      END

      actual_gap = ((pdf.find_unique_text 'foo')[:y] - (pdf.find_unique_text 'bar')[:y]).round 4

      (expect actual_gap).to eql (expected_gap)
      (expect actual_gap).to be > 75
    end

    it 'should preserve newlines in paragraph with hardbreaks option' do
      pdf = to_pdf <<~'END', analyze: true
      [%hardbreaks]
      foo
      bar
      baz
      END

      (expect pdf.lines).to eql %w(foo bar baz)
    end
  end

  context 'Thematic Breaks' do
    it 'should draw line for thematic break' do
      input = <<~'END'
      before

      '''

      after
      END

      pdf = to_pdf input, analyze: true

      before_text = (pdf.find_text 'before')[0]
      after_text = (pdf.find_text 'after')[0]

      pdf = to_pdf input, analyze: :line
      lines = pdf.lines
      (expect lines).to have_size 1
      line = lines[0]
      (expect line[:color]).to eql 'EEEEEE'
      (expect line[:width]).to eql 0.5
      (expect line[:from][:x]).to be < line[:to][:x]
      (expect line[:from][:y]).to eql line[:to][:y]
      (expect line[:from][:y]).to be < before_text[:y]
      (expect line[:from][:y]).to be > after_text[:y]
    end

    it 'should use solid style for thematic break if not specified' do
      pdf = to_pdf <<~'END', pdf_theme: { thematic_break_border_style: nil }, analyze: :line
      '''
      END

      lines = pdf.lines
      (expect lines).to have_size 1
      line = lines[0]
      (expect line[:width]).to eql 0.5
    end

    it 'should allow theme to configure line width, style, and color of thematic break' do
      pdf_theme = {
        thematic_break_border_color: 'AA0000',
        thematic_break_border_width: 3,
        thematic_break_border_style: 'double',
      }

      input = <<~'END'
      before

      '''

      after
      END

      pdf = to_pdf input, pdf_theme: pdf_theme, analyze: true

      before_text = (pdf.find_text 'before')[0]
      after_text = (pdf.find_text 'after')[0]

      pdf = to_pdf input, pdf_theme: pdf_theme, analyze: :line
      lines = pdf.lines
      (expect lines).to have_size 2
      line = lines[0]
      (expect line[:color]).to eql 'AA0000'
      (expect line[:width]).to eql 1.0
      (expect line[:from][:x]).to be < line[:to][:x]
      (expect line[:from][:y]).to eql line[:to][:y]
      (expect line[:from][:y]).to be < before_text[:y]
      (expect line[:from][:y]).to be > after_text[:y]
      (expect line[:from][:y] - 2).to eql lines[1][:from][:y]
    end
  end

  context 'Page Breaks' do
    it 'should advance to next page after page break' do
      pdf = to_pdf <<~'END', analyze: :page
      foo

      <<<

      bar
      END

      (expect pdf.pages).to have_size 2
      (expect pdf.pages[0][:strings]).to include 'foo'
      (expect pdf.pages[1][:strings]).to include 'bar'
    end

    it 'should insert page break if page does not have columns' do
      pdf = to_pdf <<~'END', analyze: true
      = Document Title
      :notitle:

      first page

      [.column]
      <<<

      second page
      END

      (expect pdf.pages).to have_size 2
      (expect (pdf.find_unique_text 'first page')[:page_number]).to eql 1
      (expect (pdf.find_unique_text 'second page')[:page_number]).to eql 2
    end

    it 'should not advance to next page if at start of document' do
      pdf = to_pdf <<~'END', analyze: :page
      <<<

      foo
      END

      (expect pdf.pages).to have_size 1
    end

    it 'should advance to next page if at start of document and always option is specified' do
      pdf = to_pdf <<~'END', analyze: true
      [%always]
      <<<

      content
      END

      (expect pdf.pages).to have_size 2
      (expect (pdf.find_unique_text 'content')[:page_number]).to eql 2
    end

    it 'should not advance to next page if preceding content forced a new page to be started' do
      pdf = to_pdf <<~'END', analyze: true
      = Book Title
      :doctype: book

      = Part

      <<<

      == Chapter
      END

      part_text = (pdf.find_text 'Part')[0]
      (expect part_text[:page_number]).to be 2
      chapter_text = (pdf.find_text 'Chapter')[0]
      (expect chapter_text[:page_number]).to be 3
    end

    it 'should not advance to next page if preceding content advanced page' do
      pdf = to_pdf <<~END, analyze: true
      ....
      #{(['filler'] * 50).join ?\n}
      ....

      start of page
      END

      start_of_page_text = (pdf.find_text 'start of page')[0]
      (expect start_of_page_text[:page_number]).to be 2
    end

    it 'should not advance to next column if at start of column in multi-column layout' do
      pdf = to_pdf <<~'END', pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      [.column]
      <<<

      column 1
      END

      (expect pdf.pages).to have_size 1
      text = pdf.find_unique_text 'column 1'
      (expect text[:x]).to eql 48.24
      (expect text[:y]).to be < (pdf.find_unique_text 'Article Title')[:y]
    end

    it 'should advance to next column if at start of column in multi-column layout and always option is specified' do
      pdf = to_pdf <<~'END', pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      [.column%always]
      <<<

      column 1
      END

      (expect pdf.pages).to have_size 1
      text = pdf.find_unique_text 'column 1'
      (expect text[:x]).to be > 48.24
      (expect text[:y]).to be < (pdf.find_unique_text 'Article Title')[:y]
    end

    it 'should not leave blank page at the end of document' do
      input = <<~'END'
      foo

      <<<
      END

      [
        {},
        { page_background_color: 'eeeeee' },
        { page_background_image: %(image:#{fixture_file 'square.svg'}[]) },
      ].each do |pdf_theme|
        pdf = to_pdf input, pdf_theme: pdf_theme, analyze: :page
        (expect pdf.pages).to have_size 1
      end
    end

    it 'should change layout if page break specifies page-layout attribute' do
      pdf = to_pdf <<~'END', analyze: true
      portrait

      [page-layout=landscape]
      <<<

      landscape
      END

      text = pdf.text
      (expect text).to have_size 2
      (expect text[0].values_at :string, :page_number, :x, :y).to eql ['portrait', 1, 48.24, 793.926]
      (expect text[1].values_at :string, :page_number, :x, :y).to eql ['landscape', 2, 48.24, 547.316]
    end

    it 'should change layout if page break specifies layout role' do
      pdf = to_pdf <<~'END', analyze: true
      portrait

      [.landscape]
      <<<

      landscape
      END

      text = pdf.text
      (expect text).to have_size 2
      (expect text[0].values_at :string, :page_number, :x, :y).to eql ['portrait', 1, 48.24, 793.926]
      (expect text[1].values_at :string, :page_number, :x, :y).to eql ['landscape', 2, 48.24, 547.316]
    end

    it 'should switch layout each time page break specifies layout role' do
      pdf = to_pdf <<~'END', analyze: true
      portrait

      [.landscape]
      <<<

      landscape

      [.portrait]
      <<<

      portrait

      [.landscape]
      <<<

      landscape
      END

      portrait_text = pdf.find_text 'portrait'
      (expect portrait_text).to have_size 2
      portrait_text.each do |text|
        page = pdf.page text[:page_number]
        (expect page[:size]).to eql PDF::Core::PageGeometry::SIZES['A4']
      end

      landscape_text = pdf.find_text 'landscape'
      (expect landscape_text).to have_size 2
      landscape_text.each do |text|
        page = pdf.page text[:page_number]
        (expect page[:size]).to eql PDF::Core::PageGeometry::SIZES['A4'].reverse
      end
    end

    it 'should switch layout specified by page break even when it falls at a natural page break' do
      pdf = to_pdf <<~END, analyze: true
      portrait

      [.landscape]
      <<<

      #{%(landscape +\n) * 31}landscape

      [.portrait]
      <<<

      portrait
      END

      (expect (pdf.page 3)[:size]).to eql PDF::Core::PageGeometry::SIZES['A4']
    end

    it 'should not switch layout specified by page break if value is unrecognized' do
      pdf = to_pdf <<~END, analyze: true
      portrait

      [.landscape]
      <<<

      landscape

      [page-layout=unknown]
      <<<

      landscape
      END

      (expect (pdf.page 3)[:size]).to eql (pdf.page 2)[:size]
    end

    it 'should insert page break in column layout' do
      pdf = to_pdf <<~END, pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      column 1, page 1

      <<<

      column 1, page 2
      END

      c1p1_text = pdf.find_unique_text 'column 1, page 1'
      (expect c1p1_text[:x]).to eql 48.24
      (expect c1p1_text[:page_number]).to eql 1
      c1p2_text = pdf.find_unique_text 'column 1, page 2'
      (expect c1p2_text[:x]).to eql 48.24
      (expect c1p2_text[:page_number]).to eql 2
    end

    it 'should insert page break with custom layout in column layout' do
      pdf = to_pdf <<~END, pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      column 1, page 1

      [page-layout=landscape]
      <<<

      column 1, page 2
      END

      c1p1_text = pdf.find_unique_text 'column 1, page 1'
      (expect c1p1_text[:x]).to eql 48.24
      (expect c1p1_text[:page_number]).to eql 1
      p1 = pdf.pages[0]
      (expect p1[:size][0]).to be < p1[:size][1]
      c1p2_text = pdf.find_unique_text 'column 1, page 2'
      (expect c1p2_text[:x]).to eql 48.24
      (expect c1p2_text[:page_number]).to eql 2
      p2 = pdf.pages[1]
      (expect p2[:size][0]).to be > p2[:size][1]
    end

    it 'should insert column break in column layout if column role is specified' do
      pdf = to_pdf <<~END, pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      column 1, page 1

      [.column]
      <<<

      column 2, page 1
      END

      c1p1_text = pdf.find_unique_text 'column 1, page 1'
      (expect c1p1_text[:x]).to eql 48.24
      (expect c1p1_text[:page_number]).to eql 1
      c2p1_text = pdf.find_unique_text 'column 2, page 1'
      (expect c2p1_text[:x]).to be > 48.24
      (expect c2p1_text[:page_number]).to eql 1
    end

    it 'should insert page break in column layout if page layout is specified even if column role is specified' do
      pdf = to_pdf <<~END, pdf_theme: { page_columns: 2 }, analyze: true
      = Article Title

      column 1, page 1

      [.column,page-layout=landscape]
      <<<

      column 1, page 2
      END

      c1p1_text = pdf.find_unique_text 'column 1, page 1'
      (expect c1p1_text[:x]).to eql 48.24
      (expect c1p1_text[:page_number]).to eql 1
      c1p2_text = pdf.find_unique_text 'column 1, page 2'
      (expect c1p2_text[:x]).to eql 48.24
      (expect c1p2_text[:page_number]).to eql 2
    end
  end
end
