require 'spec_helper'

describe Prawn::Text::Box do
  let(:pdf) { create_pdf }

  it 'is able to set leading document-wide' do
    pdf.default_leading(7)
    pdf.default_leading = 7
    text_box = described_class.new('hello world', document: pdf)
    expect(text_box.leading).to eq(7)
  end

  it 'option should be able to override document-wide leading' do
    pdf.default_leading = 7
    text_box = described_class.new(
      'hello world',
      document: pdf,
      leading: 20
    )
    expect(text_box.leading).to eq(20)
  end

  it 'is able to set text direction document-wide' do
    pdf.text_direction(:rtl)
    pdf.text_direction = :rtl
    string = "Hello world, how are you?\nI'm fine, thank you."
    text_box = described_class.new(string, document: pdf)
    text_box.render
    text = PDF::Inspector::Text.analyze(pdf.render)
    expect(text.strings[0]).to eq('?uoy era woh ,dlrow olleH')
    expect(text.strings[1]).to eq(".uoy knaht ,enif m'I")
  end

  it 'is able to reverse multi-byte text' do
    pdf.text_direction(:rtl)
    pdf.text_direction = :rtl
    pdf.text_direction = :rtl
    pdf.font("/usr/share/fonts/truetype/arphic-gkai00mp/gkai00mp.ttf", size: 16) do
      pdf.text '写个小'
    end
    text = PDF::Inspector::Text.analyze(pdf.render)
    expect(text.strings[0]).to eq('小个写')
  end

  it 'option should be able to override document-wide text direction' do
    pdf.text_direction = :rtl
    string = "Hello world, how are you?\nI'm fine, thank you."
    text_box = described_class.new(
      string,
      document: pdf,
      direction: :ltr
    )
    text_box.render
    text = PDF::Inspector::Text.analyze(pdf.render)
    expect(text.strings[0]).to eq('Hello world, how are you?')
    expect(text.strings[1]).to eq("I'm fine, thank you.")
  end

  it 'should only require enough space for the descender and the ascender ' \
    'when determining whether a line can fit' do
    text = 'Oh hai text rect'
    options = {
      document: pdf,
      height: pdf.font.ascender + pdf.font.descender
    }
    text_box = described_class.new(text, options)
    text_box.render
    expect(text_box.text).to eq('Oh hai text rect')

    text = "Oh hai text rect\nOh hai text rect"
    options = {
      document: pdf,
      height: pdf.font.height + pdf.font.ascender + pdf.font.descender
    }
    text_box = described_class.new(text, options)
    text_box.render
    expect(text_box.text).to eq("Oh hai text rect\nOh hai text rect")
  end

  describe '#nothing_printed?' do
    it 'returns true when nothing printed' do
      string = "Hello world, how are you?\nI'm fine, thank you."
      text_box = described_class.new(string, height: 2, document: pdf)
      text_box.render
      expect(text_box.nothing_printed?).to eq true
    end

    it 'returns false when something printed' do
      string = "Hello world, how are you?\nI'm fine, thank you."
      text_box = described_class.new(string, height: 14, document: pdf)
      text_box.render
      expect(text_box.nothing_printed?).to eq false
    end
  end

  describe '#everything_printed?' do
    it 'returns false when not everything printed' do
      string = "Hello world, how are you?\nI'm fine, thank you."
      text_box = described_class.new(string, height: 14, document: pdf)
      text_box.render
      expect(text_box.everything_printed?).to eq false
    end

    it 'returns true when everything printed' do
      string = "Hello world, how are you?\nI'm fine, thank you."
      text_box = described_class.new(string, document: pdf)
      text_box.render
      expect(text_box.everything_printed?).to eq true
    end
  end

  describe '#line_gap' do
    it 'should == the line gap of the font when using a single ' \
      'font and font size' do
      string = "Hello world, how are you?\nI'm fine, thank you."
      text_box = described_class.new(string, document: pdf)
      text_box.render
      expect(text_box.line_gap).to be_within(0.0001).of(pdf.font.line_gap)
    end
  end

  describe '#render with :align => :justify' do
    it 'draws the word spacing to the document' do
      string = 'hello world ' * 20
      options = { document: pdf, align: :justify }
      text_box = described_class.new(string, options)
      text_box.render
      contents = PDF::Inspector::Text.analyze(pdf.render)
      expect(contents.word_spacing[0]).to be > 0
    end

    it 'does not justify the last line of a paragraph' do
      string = 'hello world '
      options = { document: pdf, align: :justify }
      text_box = described_class.new(string, options)
      text_box.render
      contents = PDF::Inspector::Text.analyze(pdf.render)
      expect(contents.word_spacing).to be_empty
    end
  end

  describe '#height without leading' do
    it 'should == the sum of the height of each line, ' \
      'not including the space below the last line' do
      text = "Oh hai text rect.\nOh hai text rect."
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.height).to be_within(0.001)
        .of(pdf.font.height * 2 - pdf.font.line_gap)
    end
  end

  describe '#height with leading' do
    it 'should == the sum of the height of each line plus leading, ' \
      'but not including the space below the last line' do
      text = "Oh hai text rect.\nOh hai text rect."
      leading = 12
      options = { document: pdf, leading: leading }
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.height).to be_within(0.001).of(
        (pdf.font.height + leading) * 2 - pdf.font.line_gap - leading
      )
    end
  end

  context 'with :draw_text_callback' do
    it 'hits the callback whenever text is drawn' do
      draw_block = instance_spy('Draw block')

      pdf.text_box 'this text is long enough to span two lines',
        width: 150,
        draw_text_callback: ->(text, _) { draw_block.kick(text) }

      expect(draw_block).to have_received(:kick)
        .with('this text is long enough to')
      expect(draw_block).to have_received(:kick).with('span two lines')
    end

    it 'hits the callback once per fragment for :inline_format' do
      draw_block = instance_spy('Draw block')

      pdf.text_box 'this text has <b>fancy</b> formatting',
        inline_format: true, width: 500,
        draw_text_callback: ->(text, _) { draw_block.kick(text) }

      expect(draw_block).to have_received(:kick).with('this text has ')
      expect(draw_block).to have_received(:kick).with('fancy')
      expect(draw_block).to have_received(:kick).with(' formatting')
    end

    it 'does not call #draw_text!' do
      allow(pdf).to receive(:draw_text!)
      pdf.text_box 'some text', width: 500,
                                draw_text_callback: ->(_, _) {}
      expect(pdf).to_not have_received(:draw_text!)
    end
  end

  describe '#valid_options' do
    it 'returns an array' do
      text_box = described_class.new('', document: pdf)
      expect(text_box.valid_options).to be_a_kind_of(Array)
    end
  end

  describe '#render' do
    it 'does not fail if height is smaller than 1 line' do
      text = 'Oh hai text rect. ' * 10
      options = {
        height: pdf.font.height * 0.5,
        document: pdf
      }
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.text).to eq('')
    end

    it 'draws content to the page' do
      text = 'Oh hai text rect. ' * 10
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render
      text = PDF::Inspector::Text.analyze(pdf.render)
      expect(text.strings).to_not be_empty
    end

    it 'does not draw a transformation matrix' do
      text = 'Oh hai text rect. ' * 10
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render
      matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
      expect(matrices.matrices.length).to eq(0)
    end
  end

  describe '#render(:single_line => true)' do
    it 'draws only one line to the page' do
      text = 'Oh hai text rect. ' * 10
      options = {
        document: pdf,
        single_line: true
      }
      text_box = described_class.new(text, options)
      text_box.render
      text = PDF::Inspector::Text.analyze(pdf.render)
      expect(text.strings.length).to eq(1)
    end
  end

  describe '#render(:dry_run => true)' do
    it 'does not draw any content to the page' do
      text = 'Oh hai text rect. ' * 10
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render(dry_run: true)
      text = PDF::Inspector::Text.analyze(pdf.render)
      expect(text.strings).to be_empty
    end

    it 'subsequent calls to render do not raise an ArgumentError exception' do
      text = '™©'
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render(dry_run: true)

      expect do
        text_box.render
      end.to_not raise_exception
    end
  end

  describe '#render(:valign => :bottom)' do
    it '#at should be the same from one dry run to the next' do
      text = 'this is center text ' * 12
      options = {
        width: 162,
        valign: :bottom,
        document: pdf
      }
      text_box = described_class.new(text, options)

      text_box.render(dry_run: true)
      original_at = text_box.at.dup

      text_box.render(dry_run: true)
      expect(text_box.at).to eq(original_at)
    end
  end

  describe '#render(:valign => :center)' do
    it '#at should be the same from one dry run to the next' do
      text = 'this is center text ' * 12
      options = {
        width: 162,
        valign: :center,
        document: pdf
      }
      text_box = described_class.new(text, options)

      text_box.render(dry_run: true)
      original_at = text_box.at.dup

      text_box.render(dry_run: true)
      expect(text_box.at).to eq(original_at)
    end
  end

  describe '#render with :rotate option of 30)' do
    let(:angle) { 30 }
    let(:x) { 300 }
    let(:y) { 70 }
    let(:width) { 100 }
    let(:height) { 50 }
    let(:cos) { Math.cos(angle * Math::PI / 180) }
    let(:sin) { Math.sin(angle * Math::PI / 180) }
    let(:text) { 'Oh hai text rect. ' * 10 }
    let(:options) do
      {
        document: pdf,
        rotate: angle,
        at: [x, y],
        width: width,
        height: height
      }
    end

    context ':rotate_around option of :center' do
      it 'draws content to the page rotated about the center of the text' do
        options[:rotate_around] = :center
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_ = x + width / 2
        y_ = y - height / 2
        x_prime = x_ * cos - y_ * sin
        y_prime = x_ * sin + y_ * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x_ - x_prime),
          reduce_precision(y_ - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end

    context ':rotate_around option of :upper_left' do
      it 'draws content to the page rotated about the upper left corner of '\
        'the text' do
        options[:rotate_around] = :upper_left
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_prime = x * cos - y * sin
        y_prime = x * sin + y * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x - x_prime),
          reduce_precision(y - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end

    context 'default :rotate_around' do
      it 'draws content to the page rotated about the upper left corner of '\
        'the text' do
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_prime = x * cos - y * sin
        y_prime = x * sin + y * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x - x_prime),
          reduce_precision(y - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end

    context ':rotate_around option of :upper_right' do
      it 'draws content to the page rotated about the upper right corner of '\
        'the text' do
        options[:rotate_around] = :upper_right
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_ = x + width
        y_ = y
        x_prime = x_ * cos - y_ * sin
        y_prime = x_ * sin + y_ * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x_ - x_prime),
          reduce_precision(y_ - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end

    context ':rotate_around option of :lower_right' do
      it 'draws content to the page rotated about the lower right corner of '\
        'the text' do
        options[:rotate_around] = :lower_right
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_ = x + width
        y_ = y - height
        x_prime = x_ * cos - y_ * sin
        y_prime = x_ * sin + y_ * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x_ - x_prime),
          reduce_precision(y_ - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end

    context ':rotate_around option of :lower_left' do
      it 'draws content to the page rotated about the lower left corner of '\
        'the text' do
        options[:rotate_around] = :lower_left
        text_box = described_class.new(text, options)
        text_box.render

        matrices = PDF::Inspector::Graphics::Matrix.analyze(pdf.render)
        x_ = x
        y_ = y - height
        x_prime = x_ * cos - y_ * sin
        y_prime = x_ * sin + y_ * cos
        expect(matrices.matrices[0]).to eq([
          1, 0, 0, 1,
          reduce_precision(x_ - x_prime),
          reduce_precision(y_ - y_prime)
        ])
        expect(matrices.matrices[1]).to eq([
          reduce_precision(cos),
          reduce_precision(sin),
          reduce_precision(-sin),
          reduce_precision(cos),
          0, 0
        ])

        text = PDF::Inspector::Text.analyze(pdf.render)
        expect(text.strings).to_not be_empty
      end
    end
  end

  describe 'default height' do
    it 'is the height from the bottom bound to document.y' do
      target_height = pdf.y - pdf.bounds.bottom
      text = "Oh hai\n" * 60
      text_box = described_class.new(text, document: pdf)
      text_box.render
      expect(text_box.height).to be_within(pdf.font.height).of(target_height)
    end

    it 'uses the margin-box bottom if only in a stretchy bbox' do
      pdf.bounding_box([0, pdf.cursor], width: pdf.bounds.width) do
        target_height = pdf.y - pdf.bounds.bottom
        text = "Oh hai\n" * 60
        text_box = described_class.new(text, document: pdf)
        text_box.render
        expect(text_box.height).to be_within(pdf.font.height).of(target_height)
      end
    end

    it 'should use the parent-box bottom if in a stretchy bbox and ' \
      'overflow is :expand, even with an explicit height' do
      pdf.bounding_box([0, pdf.cursor], width: pdf.bounds.width) do
        target_height = pdf.y - pdf.bounds.bottom
        text = "Oh hai\n" * 60
        text_box = described_class.new(
          text,
          document: pdf,
          height: 100,
          overflow: :expand
        )
        text_box.render
        expect(text_box.height).to be_within(pdf.font.height).of(target_height)
      end
    end

    it 'uses the innermost non-stretchy bbox, not the margin box' do
      pdf.bounding_box(
        [0, pdf.cursor],
        width: pdf.bounds.width,
        height: 200
      ) do
        pdf.bounding_box([0, pdf.cursor], width: pdf.bounds.width) do
          text = "Oh hai\n" * 60
          text_box = described_class.new(text, document: pdf)
          text_box.render
          expect(text_box.height).to be_within(pdf.font.height).of(200)
        end
      end
    end
  end

  describe 'default at' do
    it 'is the left corner of the bounds, and the current document.y' do
      target_at = [pdf.bounds.left, pdf.y]
      text = 'Oh hai text rect. ' * 100
      options = { document: pdf }
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.at).to eq(target_at)
    end
  end

  context 'with text than can fit in the box' do
    let(:text) { 'Oh hai text rect. ' * 10 }
    let(:options) do
      {
        width: 162.0,
        height: 162.0,
        document: pdf
      }
    end

    it 'printed text should match requested text, except that preceding and ' \
      'trailing white space will be stripped from each line, and newlines ' \
      'may be inserted' do
      text_box = described_class.new('  ' + text, options)
      text_box.render
      expect(text_box.text.tr("\n", ' ')).to eq(text.strip)
    end

    it 'render returns an empty string because no text remains unprinted' do
      text_box = described_class.new(text, options)
      expect(text_box.render).to eq('')
    end

    it 'is truncated when the leading is set high enough to prevent all the '\
      'lines from being printed' do
      options[:leading] = 40
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.text.tr("\n", ' ')).to_not eq(text.strip)
    end
  end

  context 'with text that fits exactly in the box' do
    let(:lines) { 3 }
    let(:interlines) { lines - 1 }
    let(:text) { (1..lines).to_a.join("\n") }
    let(:options) do
      {
        width: 162.0,
        height: pdf.font.ascender + pdf.font.height * interlines +
          pdf.font.descender,
        document: pdf
      }
    end

    it 'has the expected height' do
      expected_height = options.delete(:height)
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.height).to be_within(0.0001).of(expected_height)
    end

    it 'prints everything' do
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.text).to eq(text)
    end

    describe 'with leading' do
      before do
        options[:leading] = 15
      end

      it 'does not overflow when enough height is added' do
        options[:height] += options[:leading] * interlines
        text_box = described_class.new(text, options)
        text_box.render
        expect(text_box.text).to eq(text)
      end

      it 'overflows when insufficient height is added' do
        options[:height] += options[:leading] * interlines - 1
        text_box = described_class.new(text, options)
        text_box.render
        expect(text_box.text).to_not eq(text)
      end
    end

    context 'with negative leading' do
      before do
        options[:leading] = -4
      end

      it 'does not overflow when enough height is removed' do
        options[:height] += options[:leading] * interlines
        text_box = described_class.new(text, options)
        text_box.render
        expect(text_box.text).to eq(text)
      end

      it 'overflows when too much height is removed' do
        options[:height] += options[:leading] * interlines - 1
        text_box = described_class.new(text, options)
        text_box.render
        expect(text_box.text).to_not eq(text)
      end
    end
  end

  context 'printing UTF-8 string with higher bit characters' do
    let(:text) { '©' }

    let(:text_box) do
      # not enough height to print any text, so we can directly compare against
      # the input string
      bounding_height = 1.0
      options = {
        height: bounding_height,
        document: pdf
      }
      described_class.new(text, options)
    end

    before do
      file = "#{Prawn::DATADIR}/fonts/Panic+Sans.dfont"
      pdf.font_families['Panic Sans'] = {
        normal: { file: file, font: 'PanicSans' },
        italic: { file: file, font: 'PanicSans-Italic' },
        bold: { file: file, font: 'PanicSans-Bold' },
        bold_italic: { file: file, font: 'PanicSans-BoldItalic' }
      }
    end

    describe 'when using a TTF font' do
      it 'unprinted text should be in UTF-8 encoding' do
        pdf.font('Panic Sans')
        remaining_text = text_box.render
        expect(remaining_text).to eq(text)
      end
    end

    describe 'when using an AFM font' do
      it 'unprinted text should be in UTF-8 encoding' do
        remaining_text = text_box.render
        expect(remaining_text).to eq(text)
      end
    end
  end

  context 'with more text than can fit in the box' do
    let(:text) { 'Oh hai text rect. ' * 30 }
    let(:bounding_height) { 162.0 }
    let(:options) do
      {
        width: 162.0,
        height: bounding_height,
        document: pdf
      }
    end

    context 'truncated overflow' do
      let(:text_box) do
        described_class.new(text, options.merge(overflow: :truncate))
      end

      it 'is truncated' do
        text_box.render
        expect(text_box.text.tr("\n", ' ')).to_not eq(text.strip)
      end

      it 'render does not return an empty string because some text remains '\
        'unprinted' do
        expect(text_box.render).to_not be_empty
      end

      it '#height should be no taller than the specified height' do
        text_box.render
        expect(text_box.height).to be <= bounding_height
      end

      it '#height should be within one font height of the specified height' do
        text_box.render
        expect(bounding_height).to be_within(pdf.font.height)
          .of(text_box.height)
      end

      context 'with :rotate option' do
        it 'unrendered text should be the same as when not rotated' do
          remaining_text = text_box.render

          rotate = 30
          x = 300
          y = 70
          options[:document] = pdf
          options[:rotate] = rotate
          options[:at] = [x, y]
          rotated_text_box = described_class.new(text, options)
          expect(rotated_text_box.render).to eq(remaining_text)
        end
      end
    end

    context 'truncated with text and size taken from the manual' do
      it 'returns the right text' do
        text = 'This is the beginning of the text. It will be cut somewhere ' \
          'and the rest of the text will procede to be rendered this time by '\
          'calling another method.' + ' . ' * 50
        options[:width] = 300
        options[:height] = 50
        options[:size] = 18
        text_box = described_class.new(text, options)
        remaining_text = text_box.render
        expect(remaining_text).to eq(
          'text will procede to be rendered this time by calling another ' \
          'method. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  ' \
          '.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  ' \
          '.  .  .  .  .  .  .  .  . '
        )
      end
    end

    context 'expand overflow' do
      let(:text_box) do
        described_class.new(text, options.merge(overflow: :expand))
      end

      it 'height expands to encompass all the text '\
        '(but not exceed the height of the page)' do
        text_box.render
        expect(text_box.height).to be > bounding_height
      end

      it 'displays the entire string (as long as there was space remaining on '\
        'the page to print all the text)' do
        text_box.render
        expect(text_box.text.tr("\n", ' ')).to eq(text.strip)
      end

      it 'render returns an empty string because no text remains unprinted '\
        '(as long as there was space remaining on the page to print all '\
        'the text)' do
        expect(text_box.render).to eq('')
      end
    end

    context 'shrink_to_fit overflow' do
      let(:text_box) do
        described_class.new(
          text,
          options.merge(
            overflow: :shrink_to_fit,
            min_font_size: 2
          )
        )
      end

      it 'displays the entire text' do
        text_box.render
        expect(text_box.text.tr("\n", ' ')).to eq(text.strip)
      end

      it 'render returns an empty string because no text remains unprinted' do
        expect(text_box.render).to eq('')
      end
    end

    context 'shrink_to_fit overflow' do
      it 'does not drop below the minimum font size' do
        options[:overflow] = :shrink_to_fit
        options[:min_font_size] = 10.1
        text_box = described_class.new(text, options)
        text_box.render

        actual_text = PDF::Inspector::Text.analyze(pdf.render)
        expect(actual_text.font_settings[0][:size]).to eq(10.1)
      end
    end
  end

  context 'with enough space to fit the text but using the ' \
    'shrink_to_fit overflow' do
    it 'does not shrink the text when there is no need to' do
      bounding_height = 162.0
      options = {
        width: 162.0,
        height: bounding_height,
        overflow: :shrink_to_fit,
        min_font_size: 5,
        document: pdf
      }
      text_box = described_class.new("hello\nworld", options)
      text_box.render

      text = PDF::Inspector::Text.analyze(pdf.render)
      expect(text.font_settings[0][:size]).to eq(12)
    end
  end

  context 'with a solid block of Chinese characters' do
    it 'printed text should match requested text, except for newlines' do
      text = '写中国字' * 10
      options = {
        width: 162.0,
        height: 162.0,
        document: pdf,
        overflow: :truncate
      }
      pdf.font "/usr/share/fonts/truetype/arphic-gkai00mp/gkai00mp.ttf"
      text_box = described_class.new(text, options)
      text_box.render
      expect(text_box.text.delete("\n")).to eq(text)
    end
  end

  describe 'drawing bounding boxes' do
    it 'restores the margin box when bounding box exits' do
      margin_box = pdf.bounds

      pdf.text_box 'Oh hai text box. ' * 11, height: pdf.font.height * 10

      expect(pdf.bounds).to eq(margin_box)
    end
  end

  describe '#render with :character_spacing option' do
    it 'draws the character spacing to the document' do
      string = 'hello world'
      options = { document: pdf, character_spacing: 10 }
      text_box = described_class.new(string, options)
      text_box.render
      contents = PDF::Inspector::Text.analyze(pdf.render)
      expect(contents.character_spacing[0]).to eq(10)
    end

    it 'takes character spacing into account when wrapping' do
      pdf.font 'Courier'
      text_box = described_class.new(
        'hello world',
        width: 100,
        overflow: :expand,
        character_spacing: 10,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq("hello\nworld")
    end
  end

  describe 'wrapping' do
    it 'wraps text' do
      text = 'Please wrap this text about HERE. ' \
        'More text that should be wrapped'
      expect = "Please wrap this text about\n"\
        "HERE. More text that should be\nwrapped"

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 220,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    # white space was being stripped after the entire line was generated,
    # meaning that leading white space characters reduced the amount of space on
    # the line for other characters, so wrapping "hello hello" resulted in
    # "hello\n\nhello", rather than "hello\nhello"
    #
    it 'white space at beginning of line should not be taken into account ' \
      'when computing line width' do
      text = 'hello hello'
      expect = "hello\nhello"

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 40,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'respects end of line when wrapping text' do
      text = "Please wrap only before\nTHIS word. Don't wrap this"
      expect = text

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 220,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'respects multiple newlines when wrapping text' do
      text = "Please wrap only before THIS\n\nword. Don't wrap this"
      expect = "Please wrap only before\nTHIS\n\nword. Don't wrap this"

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 200,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'respects multiple newlines when wrapping text when those newlines '\
      'coincide with a line break' do
      text = "Please wrap only before\n\nTHIS word. Don't wrap this"
      expect = text

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 220,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'respects initial newlines' do
      text = "\nThis should be on line 2"
      expect = text

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 220,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'wraps lines comprised of a single word of the bounds when '\
      'wrapping text' do
      text = 'You_can_wrap_this_text_HERE'
      expect = "You_can_wrap_this_text_HE\nRE"

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 180,
        overflow: :expand,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end

    it 'wraps lines comprised of a single word of the bounds when '\
      'wrapping text' do
      text = '©' * 30

      pdf.font 'Courier'
      text_box = described_class.new(
        text, width: 180,
              overflow: :expand,
              document: pdf
      )

      text_box.render

      expected = '©' * 25 + "\n" + '©' * 5
      pdf.font.normalize_encoding!(expected)
      expected = expected.force_encoding(Encoding::UTF_8)
      expect(text_box.text).to eq(expected)
    end

    it 'wraps non-unicode strings using single-byte word-wrapping' do
      text = 'continúa esforzandote ' * 5
      text_box = described_class.new(
        text, width: 180,
              document: pdf
      )
      text_box.render
      results_with_accent = text_box.text

      text = 'continua esforzandote ' * 5
      text_box = described_class.new(
        text, width: 180,
              document: pdf
      )
      text_box.render
      results_without_accent = text_box.text

      expect(first_line(results_with_accent).length)
        .to eq(first_line(results_without_accent).length)
    end

    it 'allows you to disable wrapping by char' do
      text = 'You_cannot_wrap_this_text_at_all_because_we_are_disabling_' \
        'wrapping_by_char_and_there_are_no_word_breaks'

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 180,
        overflow: :shrink_to_fit,
        disable_wrap_by_char: true,
        document: pdf
      )
      expect { text_box.render }.to raise_error(Prawn::Errors::CannotFit)
    end

    it 'retains full words with :shrink_to_fit if char wrapping is disabled' do
      text = 'Wrapped_words'
      expect = 'Wrapped_words'

      pdf.font 'Courier'
      text_box = described_class.new(
        text,
        width: 50,
        height: 50,
        size: 50,
        overflow: :shrink_to_fit,
        disable_wrap_by_char: true,
        document: pdf
      )
      text_box.render
      expect(text_box.text).to eq(expect)
    end
  end

  describe 'Text::Box#render with :mode option' do
    it 'alters the text rendering mode of the document' do
      string = 'hello world'
      options = { document: pdf, mode: :fill_stroke }
      text_box = described_class.new(string, options)
      text_box.render
      contents = PDF::Inspector::Text.analyze(pdf.render)
      expect(contents.text_rendering_mode).to eq([2, 0])
    end
  end

  def reduce_precision(float)
    (format '%.5f', float).to_f
  end

  def first_line(str)
    str.each_line { |line| return line }
  end
end