WeasyPrint/tests/test_text.py

"""
    weasyprint.tests.test_text
    --------------------------

    Test the text layout.

"""

import pytest
from weasyprint.css.properties import INITIAL_VALUES
from weasyprint.text.line_break import split_first_line

from .testing_utils import MONO_FONTS, SANS_FONTS, assert_no_logs, render_pages


def make_text(text, width=None, **style):
    """Wrapper for split_first_line() creating a style dict."""
    new_style = dict(INITIAL_VALUES)
    new_style['font_family'] = MONO_FONTS.split(',')
    new_style.update(style)
    return split_first_line(
        text, new_style, context=None, max_width=width,
        justification_spacing=0)


@assert_no_logs
def test_line_content():
    for width, remaining in [(100, 'text for test'),
                             (45, 'is a text for test')]:
        text = 'This is a text for test'
        _, length, resume_index, _, _, _ = make_text(
            text, width, font_family=SANS_FONTS.split(','), font_size=19)
        assert text[resume_index:] == remaining
        assert length + 1 == resume_index  # +1 for the removed trailing space


@assert_no_logs
def test_line_with_any_width():
    _, _, _, width_1, _, _ = make_text('some text')
    _, _, _, width_2, _, _ = make_text('some text some text')
    assert width_1 < width_2


@assert_no_logs
def test_line_breaking():
    string = 'Thïs is a text for test'

    # These two tests do not really rely on installed fonts
    _, _, resume_index, _, _, _ = make_text(string, 90, font_size=1)
    assert resume_index is None

    _, _, resume_index, _, _, _ = make_text(string, 90, font_size=100)
    assert string.encode('utf-8')[resume_index:].decode('utf-8') == (
        'is a text for test')

    _, _, resume_index, _, _, _ = make_text(
        string, 100, font_family=SANS_FONTS.split(','), font_size=19)
    assert string.encode('utf-8')[resume_index:].decode('utf-8') == (
        'text for test')


@assert_no_logs
def test_line_breaking_rtl():
    string = 'لوريم ايبسوم دولا'

    # These two tests do not really rely on installed fonts
    _, _, resume_index, _, _, _ = make_text(string, 90, font_size=1)
    assert resume_index is None

    _, _, resume_index, _, _, _ = make_text(string, 90, font_size=100)
    assert string.encode('utf-8')[resume_index:].decode('utf-8') == (
        'ايبسوم دولا')


@assert_no_logs
def test_text_dimension():
    string = 'This is a text for test. This is a test for text.py'
    _, _, _, width_1, height_1, _ = make_text(string, 200, font_size=12)

    _, _, _, width_2, height_2, _ = make_text(string, 200, font_size=20)
    assert width_1 * height_1 < width_2 * height_2


@assert_no_logs
def test_text_font_size_zero():
    page, = render_pages('''
      <style>
        p { font-size: 0; }
      </style>
      <p>test font size zero</p>
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    # zero-sized text boxes are removed
    assert not line.children
    assert line.height == 0
    assert paragraph.height == 0


@assert_no_logs
def test_text_font_size_very_small():
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/1499
    page, = render_pages('''
      <style>
        p { font-size: 0.00000001px }
      </style>
      <p>test font size zero</p>
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    assert line.height < 0.001
    assert paragraph.height < 0.001


@assert_no_logs
def test_text_spaced_inlines():
    page, = render_pages('''
      <p>start <i><b>bi1</b> <b>bi2</b></i> <b>b1</b> end</p>
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    start, i, space, b, end = line.children
    assert start.text == 'start '
    assert space.text == ' '
    assert space.width > 0
    assert end.text == ' end'

    bi1, space, bi2 = i.children
    bi1, = bi1.children
    bi2, = bi2.children
    assert bi1.text == 'bi1'
    assert space.text == ' '
    assert space.width > 0
    assert bi2.text == 'bi2'

    b1, = b.children
    assert b1.text == 'b1'


@assert_no_logs
def test_text_align_left():
    # <-------------------->  page, body
    #     +-----+
    # +---+     |
    # |   |     |
    # +---+-----+

    # ^   ^     ^          ^
    # x=0 x=40  x=100      x=200
    page, = render_pages('''
      <style>
        @page { size: 200px }
      </style>
      <body>
        <img src="pattern.png" style="width: 40px"
        ><img src="pattern.png" style="width: 60px">''')
    html, = page.children
    body, = html.children
    line, = body.children
    img_1, img_2 = line.children
    # initial value for text-align: left (in ltr text)
    assert img_1.position_x == 0
    assert img_2.position_x == 40


@assert_no_logs
def test_text_align_right():
    # <-------------------->  page, body
    #                +-----+
    #            +---+     |
    #            |   |     |
    #            +---+-----+

    # ^          ^   ^     ^
    # x=0        x=100     x=200
    #                x=140
    page, = render_pages('''
      <style>
        @page { size: 200px }
        body { text-align: right }
      </style>
      <body>
        <img src="pattern.png" style="width: 40px"
        ><img src="pattern.png" style="width: 60px">''')
    html, = page.children
    body, = html.children
    line, = body.children
    img_1, img_2 = line.children
    assert img_1.position_x == 100  # 200 - 60 - 40
    assert img_2.position_x == 140  # 200 - 60


@assert_no_logs
def test_text_align_center():
    # <-------------------->  page, body
    #           +-----+
    #       +---+     |
    #       |   |     |
    #       +---+-----+

    # ^     ^   ^     ^
    # x=    x=50     x=150
    #           x=90
    page, = render_pages('''
      <style>
        @page { size: 200px }
        body { text-align: center }
      </style>
      <body>
        <img src="pattern.png" style="width: 40px"
        ><img src="pattern.png" style="width: 60px">''')
    html, = page.children
    body, = html.children
    line, = body.children
    img_1, img_2 = line.children
    assert img_1.position_x == 50
    assert img_2.position_x == 90


@assert_no_logs
def test_text_align_justify():
    page, = render_pages('''
      <style>
        @page { size: 300px 1000px }
        body { text-align: justify }
      </style>
      <p><img src="pattern.png" style="width: 40px">
        <strong>
          <img src="pattern.png" style="width: 60px">
          <img src="pattern.png" style="width: 10px">
          <img src="pattern.png" style="width: 100px"
        ></strong><img src="pattern.png" style="width: 290px"
        ><!-- Last image will be on its own line. -->''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children
    image_1, space_1, strong = line_1.children
    image_2, space_2, image_3, space_3, image_4 = strong.children
    image_5, = line_2.children
    assert space_1.text == ' '
    assert space_2.text == ' '
    assert space_3.text == ' '

    assert image_1.position_x == 0
    assert space_1.position_x == 40
    assert strong.position_x == 70
    assert image_2.position_x == 70
    assert space_2.position_x == 130
    assert image_3.position_x == 160
    assert space_3.position_x == 170
    assert image_4.position_x == 200
    assert strong.width == 230

    assert image_5.position_x == 0


@assert_no_logs
def test_text_align_justify_all():
    page, = render_pages('''
      <style>
        @page { size: 300px 1000px }
        body { text-align: justify-all }
      </style>
      <p><img src="pattern.png" style="width: 40px">
        <strong>
          <img src="pattern.png" style="width: 60px">
          <img src="pattern.png" style="width: 10px">
          <img src="pattern.png" style="width: 100px"
        ></strong><img src="pattern.png" style="width: 200px">
        <img src="pattern.png" style="width: 10px">''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children
    image_1, space_1, strong = line_1.children
    image_2, space_2, image_3, space_3, image_4 = strong.children
    image_5, space_4, image_6 = line_2.children
    assert space_1.text == ' '
    assert space_2.text == ' '
    assert space_3.text == ' '
    assert space_4.text == ' '

    assert image_1.position_x == 0
    assert space_1.position_x == 40
    assert strong.position_x == 70
    assert image_2.position_x == 70
    assert space_2.position_x == 130
    assert image_3.position_x == 160
    assert space_3.position_x == 170
    assert image_4.position_x == 200
    assert strong.width == 230

    assert image_5.position_x == 0
    assert space_4.position_x == 200
    assert image_6.position_x == 290


@assert_no_logs
def test_text_align_all_last():
    page, = render_pages('''
      <style>
        @page { size: 300px 1000px }
        body { text-align-all: justify; text-align-last: right }
      </style>
      <p><img src="pattern.png" style="width: 40px">
        <strong>
          <img src="pattern.png" style="width: 60px">
          <img src="pattern.png" style="width: 10px">
          <img src="pattern.png" style="width: 100px"
        ></strong><img src="pattern.png" style="width: 200px"
        ><img src="pattern.png" style="width: 10px">''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children
    image_1, space_1, strong = line_1.children
    image_2, space_2, image_3, space_3, image_4 = strong.children
    image_5, image_6 = line_2.children
    assert space_1.text == ' '
    assert space_2.text == ' '
    assert space_3.text == ' '

    assert image_1.position_x == 0
    assert space_1.position_x == 40
    assert strong.position_x == 70
    assert image_2.position_x == 70
    assert space_2.position_x == 130
    assert image_3.position_x == 160
    assert space_3.position_x == 170
    assert image_4.position_x == 200
    assert strong.width == 230

    assert image_5.position_x == 90
    assert image_6.position_x == 290


@assert_no_logs
def test_text_align_not_enough_space():
    page, = render_pages('''
      <style>
        p { text-align: center; width: 0 }
        span { display: inline-block }
      </style>
      <p><span>aaaaaaaaaaaaaaaaaaaaaaaaaa</span></p>''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    span, = paragraph.children
    assert span.position_x == 0


@assert_no_logs
def test_text_align_justify_no_space():
    # single-word line (zero spaces)
    page, = render_pages('''
      <style>
        body { text-align: justify; width: 50px }
      </style>
      <p>Supercalifragilisticexpialidocious bar</p>
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children
    text, = line_1.children
    assert text.position_x == 0


@assert_no_logs
def test_text_align_justify_text_indent():
    # text-indent
    page, = render_pages('''
      <style>
        @page { size: 300px 1000px }
        body { text-align: justify }
        p { text-indent: 3px }
      </style>
      <p><img src="pattern.png" style="width: 40px">
        <strong>
          <img src="pattern.png" style="width: 60px">
          <img src="pattern.png" style="width: 10px">
          <img src="pattern.png" style="width: 100px"
        ></strong><img src="pattern.png" style="width: 290px"
        ><!-- Last image will be on its own line. -->''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children
    image_1, space_1, strong = line_1.children
    image_2, space_2, image_3, space_3, image_4 = strong.children
    image_5, = line_2.children
    assert space_1.text == ' '
    assert space_2.text == ' '
    assert space_3.text == ' '

    assert image_1.position_x == 3
    assert space_1.position_x == 43
    assert strong.position_x == 72
    assert image_2.position_x == 72
    assert space_2.position_x == 132
    assert image_3.position_x == 161
    assert space_3.position_x == 171
    assert image_4.position_x == 200
    assert strong.width == 228

    assert image_5.position_x == 0


@assert_no_logs
def test_text_align_justify_no_break_between_children():
    # Test justification when line break happens between two inline children
    # that must stay together.
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/637
    page, = render_pages('''
      <style>
        @font-face {src: url(weasyprint.otf); font-family: weasyprint}
        p { text-align: justify; font-family: weasyprint; width: 7em }
      </style>
      <p>
        <span>a</span>
        <span>b</span>
        <span>bla</span><span>,</span>
        <span>b</span>
      </p>
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line_1, line_2 = paragraph.children

    span_1, space_1, span_2, space_2 = line_1.children
    assert span_1.position_x == 0
    assert span_2.position_x == 6 * 16  # 1 character + 5 spaces
    assert line_1.width == 7 * 16  # 7em

    span_1, span_2, space_1, span_3, space_2 = line_2.children
    assert span_1.position_x == 0
    assert span_2.position_x == 3 * 16  # 3 characters
    assert span_3.position_x == 5 * 16  # (3 + 1) characters + 1 space


@assert_no_logs
def test_word_spacing():
    # keep the empty <style> as a regression test: element.text is None
    # (Not a string.)
    page, = render_pages('''
      <style></style>
      <body><strong>Lorem ipsum dolor<em>sit amet</em></strong>''')
    html, = page.children
    body, = html.children
    line, = body.children
    strong_1, = line.children

    # TODO: Pango gives only half of word-spacing to a space at the end
    # of a TextBox. Is this what we want?
    page, = render_pages('''
      <style>strong { word-spacing: 11px }</style>
      <body><strong>Lorem ipsum dolor<em>sit amet</em></strong>''')
    html, = page.children
    body, = html.children
    line, = body.children
    strong_2, = line.children
    assert strong_2.width - strong_1.width == 33


@assert_no_logs
def test_letter_spacing_1():
    page, = render_pages('''
        <body><strong>Supercalifragilisticexpialidocious</strong>''')
    html, = page.children
    body, = html.children
    line, = body.children
    strong_1, = line.children

    page, = render_pages('''
        <style>strong { letter-spacing: 11px }</style>
        <body><strong>Supercalifragilisticexpialidocious</strong>''')
    html, = page.children
    body, = html.children
    line, = body.children
    strong_2, = line.children
    assert strong_2.width - strong_1.width == 34 * 11

    # an embedded tag should not affect the single-line letter spacing
    page, = render_pages(
        '<style>strong { letter-spacing: 11px }</style>'
        '<body><strong>Supercali<span>fragilistic</span>expialidocious'
        '</strong>')
    html, = page.children
    body, = html.children
    line, = body.children
    strong_3, = line.children
    assert strong_3.width == strong_2.width

    # duplicate wrapped lines should also have same overall width
    # Note work-around for word-wrap bug (issue #163) by marking word
    # as an inline-block
    page, = render_pages(
        '<style>'
        '  strong {'
        '    letter-spacing: 11px;'
        f'    max-width: {strong_3.width * 1.5}px'
        '}'
        '  span { display: inline-block }'
        '</style>'
        '<body><strong>'
        '  <span>Supercali<i>fragilistic</i>expialidocious</span> '
        '  <span>Supercali<i>fragilistic</i>expialidocious</span>'
        '</strong>')
    html, = page.children
    body, = html.children
    line1, line2 = body.children
    assert line1.children[0].width == line2.children[0].width
    assert line1.children[0].width == strong_2.width


@pytest.mark.parametrize('spacing', ('word-spacing', 'letter-spacing'))
@assert_no_logs
def test_spacing_ex(spacing):
    # Test regression on ex units in spacing properties
    render_pages(f'<div style="{spacing}: 2ex">abc def')


@pytest.mark.parametrize('indent', ('12px', '6%'))
@assert_no_logs
def test_text_indent(indent):
    page, = render_pages('''
        <style>
            @page { size: 220px }
            body { margin: 10px; text-indent: %(indent)s }
        </style>
        <p>Some text that is long enough that it take at least three line,
           but maybe more.
    ''' % {'indent': indent})
    html, = page.children
    body, = html.children
    paragraph, = body.children
    lines = paragraph.children
    text_1, = lines[0].children
    text_2, = lines[1].children
    text_3, = lines[2].children
    assert text_1.position_x == 22  # 10px margin-left + 12px indent
    assert text_2.position_x == 10  # No indent
    assert text_3.position_x == 10  # No indent


@assert_no_logs
def test_text_indent_inline():
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/1000
    page, = render_pages('''
        <style>
            @font-face { src: url(weasyprint.otf); font-family: weasyprint }
            p { display: inline-block; text-indent: 1em;
                font-family: weasyprint }
        </style>
        <p><span>text
    ''')
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    assert line.width == (4 + 1) * 16


@pytest.mark.parametrize('indent', ('12px', '6%'))
@assert_no_logs
def test_text_indent_multipage(indent):
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/706
    pages = render_pages('''
        <style>
            @page { size: 220px 1.5em; margin: 0 }
            body { margin: 10px; text-indent: %(indent)s }
        </style>
        <p>Some text that is long enough that it take at least three line,
           but maybe more.
    ''' % {'indent': indent})
    page = pages.pop(0)
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    text, = line.children
    assert text.position_x == 22  # 10px margin-left + 12px indent

    page = pages.pop(0)
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    text, = line.children
    assert text.position_x == 10  # No indent


@assert_no_logs
def test_hyphenate_character_1():
    page, = render_pages(
        '<html style="width: 5em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-character: \'!\'" lang=fr>'
        'hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('!')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace('!', '') == 'hyphénation'


@assert_no_logs
def test_hyphenate_character_2():
    page, = render_pages(
        '<html style="width: 5em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-character: \'à\'" lang=fr>'
        'hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('à')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace('à', '') == 'hyphénation'


@assert_no_logs
def test_hyphenate_character_3():
    page, = render_pages(
        '<html style="width: 5em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-character: \'ù ù\'" lang=fr>'
        'hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('ù ù')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace(' ', '').replace('ù', '') == 'hyphénation'


@assert_no_logs
def test_hyphenate_character_4():
    page, = render_pages(
        '<html style="width: 5em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-character: \'\'" lang=fr>'
        'hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text == 'hyphénation'


@assert_no_logs
def test_hyphenate_character_5():
    page, = render_pages(
        '<html style="width: 5em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-character: \'———\'" lang=fr>'
        'hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('———')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace('—', '') == 'hyphénation'


@assert_no_logs
def test_hyphenate_manual_1():
    for i in range(1, len('hyphénation')):
        for hyphenate_character in ('!', 'ù ù'):
            word = 'hyphénation'[:i] + '\u00ad' + 'hyphénation'[i:]
            page, = render_pages(
                '<html style="width: 5em; font-family: weasyprint">'
                '<style>@font-face {'
                '  src: url(weasyprint.otf); font-family: weasyprint}</style>'
                '<body style="hyphens: manual;'
                f'  hyphenate-character: \'{hyphenate_character}\'"'
                f'  lang=fr>{word}')
            html, = page.children
            body, = html.children
            lines = body.children
            assert len(lines) == 2
            assert lines[0].children[0].text.endswith(hyphenate_character)
            full_text = ''.join(
                child.text for line in lines for child in line.children)
            assert full_text.replace(hyphenate_character, '') == word


@assert_no_logs
def test_hyphenate_manual_2():
    for i in range(1, len('hy phénation')):
        for hyphenate_character in ('!', 'ù ù'):
            word = 'hy phénation'[:i] + '\u00ad' + 'hy phénation'[i:]
            page, = render_pages(
                '<html style="width: 5em; font-family: weasyprint">'
                '<style>@font-face {'
                '  src: url(weasyprint.otf); font-family: weasyprint}</style>'
                '<body style="hyphens: manual;'
                f'  hyphenate-character: \'{hyphenate_character}\'"'
                f'  lang=fr>{word}')
            html, = page.children
            body, = html.children
            lines = body.children
            assert len(lines) in (2, 3)
            full_text = ''.join(
                child.text for line in lines for child in line.children)
            full_text = full_text.replace(hyphenate_character, '')
            if lines[0].children[0].text.endswith(hyphenate_character):
                assert full_text == word
            else:
                assert lines[0].children[0].text.endswith('y')
                if len(lines) == 3:
                    assert lines[1].children[0].text.endswith(
                        hyphenate_character)


@assert_no_logs
def test_hyphenate_manual_3():
    # Automatic hyphenation opportunities within a word must be ignored if the
    # word contains a conditional hyphen, in favor of the conditional
    # hyphen(s).
    page, = render_pages(
        '<html style="width: 0.1em" lang="en">'
        '<body style="hyphens: auto">in&shy;lighten&shy;lighten&shy;in')
    html, = page.children
    body, = html.children
    line_1, line_2, line_3, line_4 = body.children
    assert line_1.children[0].text == 'in\xad‐'
    assert line_2.children[0].text == 'lighten\xad‐'
    assert line_3.children[0].text == 'lighten\xad‐'
    assert line_4.children[0].text == 'in'


@assert_no_logs
def test_hyphenate_limit_zone_1():
    page, = render_pages(
        '<html style="width: 12em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-limit-zone: 0" lang=fr>'
        'mmmmm hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) == 2
    assert lines[0].children[0].text.endswith('‐')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace('‐', '') == 'mmmmm hyphénation'


@assert_no_logs
def test_hyphenate_limit_zone_2():
    page, = render_pages(
        '<html style="width: 12em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-limit-zone: 9em" lang=fr>'
        'mmmmm hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('mm')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text == 'mmmmmhyphénation'


@assert_no_logs
def test_hyphenate_limit_zone_3():
    page, = render_pages(
        '<html style="width: 12em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-limit-zone: 5%" lang=fr>'
        'mmmmm hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) == 2
    assert lines[0].children[0].text.endswith('‐')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text.replace('‐', '') == 'mmmmm hyphénation'


@assert_no_logs
def test_hyphenate_limit_zone_4():
    page, = render_pages(
        '<html style="width: 12em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        'hyphenate-limit-zone: 95%" lang=fr>'
        'mmmmm hyphénation')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) > 1
    assert lines[0].children[0].text.endswith('mm')
    full_text = ''.join(line.children[0].text for line in lines)
    assert full_text == 'mmmmmhyphénation'


@assert_no_logs
@pytest.mark.parametrize('css, result', (
    ('auto', 2),
    ('auto auto 0', 2),
    ('0 0 0', 2),
    ('4 4 auto', 1),
    ('6 2 4', 2),
    ('auto 1 auto', 2),
    ('7 auto auto', 1),
    ('6 auto auto', 2),
    ('5 2', 2),
    ('3', 2),
    ('2 4 6', 1),
    ('auto 4', 1),
    ('auto 2', 2),
))
def test_hyphenate_limit_chars(css, result):
    page, = render_pages(
        '<html style="width: 1em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        f'hyphenate-limit-chars: {css}" lang=en>'
        'hyphen')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) == result


@assert_no_logs
@pytest.mark.parametrize('css', (
    # light·en
    '3 3 3',  # 'en' is shorter than 3
    '3 6 2',  # 'light' is shorter than 6
    '8',  # 'lighten' is shorter than 8
))
def test_hyphenate_limit_chars_punctuation(css):
    # See https://github.com/Kozea/WeasyPrint/issues/109
    page, = render_pages(
        '<html style="width: 1em; font-family: weasyprint">'
        '<style>'
        '  @font-face {src: url(weasyprint.otf); font-family: weasyprint}'
        '</style>'
        '<body style="hyphens: auto;'
        f'hyphenate-limit-chars: {css}" lang=en>'
        '..lighten..')
    html, = page.children
    body, = html.children
    lines = body.children
    assert len(lines) == 1


@assert_no_logs
@pytest.mark.parametrize('wrap, text, test, full_text', (
    ('break-word', 'aaaaaaaa', lambda a: a > 1, 'aaaaaaaa'),
    ('normal', 'aaaaaaaa', lambda a: a == 1, 'aaaaaaaa'),
    ('break-word', 'hyphenations', lambda a: a > 3,
     'hy\u2010phen\u2010ations'),
    ('break-word', "A splitted word.  An hyphenated word.",
     lambda a: a > 8, "Asplittedword.Anhy\u2010phen\u2010atedword."),
))
def test_overflow_wrap(wrap, text, test, full_text):
    page, = render_pages('''
      <style>
        @font-face {src: url(weasyprint.otf); font-family: weasyprint}
        body {width: 80px; overflow: hidden; font-family: weasyprint; }
        span {overflow-wrap: %s; white-space: normal; }
      </style>
      <body style="hyphens: auto;" lang="en">
        <span>%s
    ''' % (wrap, text))
    html, = page.children
    body, = html.children
    lines = []
    for line in body.children:
        box, = line.children
        textBox, = box.children
        lines.append(textBox.text)
    lines_full_text = ''.join(line for line in lines)
    assert test(len(lines))
    assert full_text == lines_full_text


def white_space_lines(width, space):
    page, = render_pages('''
      <style>
        body { font-size: 100px; width: %dpx }
        span { white-space: %s }
      </style>
      <body><span>This +    \n    is text''' % (width, space))
    html, = page.children
    body, = html.children
    return body.children


@assert_no_logs
def test_white_space_1():
    line1, line2, line3, line4 = white_space_lines(1, 'normal')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This'
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '+'
    box3, = line3.children
    text3, = box3.children
    assert text3.text == 'is'
    box4, = line4.children
    text4, = box4.children
    assert text4.text == 'text'


@assert_no_logs
def test_white_space_2():
    line1, line2 = white_space_lines(1, 'pre')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This +    '
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '    is text'


@assert_no_logs
def test_white_space_3():
    line1, = white_space_lines(1, 'nowrap')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This + is text'


@assert_no_logs
def test_white_space_4():
    line1, line2, line3, line4, line5 = white_space_lines(1, 'pre-wrap')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This '
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '+    '
    box3, = line3.children
    text3, = box3.children
    assert text3.text == '    '
    box4, = line4.children
    text4, = box4.children
    assert text4.text == 'is '
    box5, = line5.children
    text5, = box5.children
    assert text5.text == 'text'


@assert_no_logs
def test_white_space_5():
    line1, line2, line3, line4 = white_space_lines(1, 'pre-line')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This'
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '+'
    box3, = line3.children
    text3, = box3.children
    assert text3.text == 'is'
    box4, = line4.children
    text4, = box4.children
    assert text4.text == 'text'


@assert_no_logs
def test_white_space_6():
    line1, = white_space_lines(1000000, 'normal')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This + is text'


@assert_no_logs
def test_white_space_7():
    line1, line2 = white_space_lines(1000000, 'pre')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This +    '
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '    is text'


@assert_no_logs
def test_white_space_8():
    line1, = white_space_lines(1000000, 'nowrap')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This + is text'


@assert_no_logs
def test_white_space_9():
    line1, line2 = white_space_lines(1000000, 'pre-wrap')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This +    '
    box2, = line2.children
    text2, = box2.children
    assert text2.text == '    is text'


@assert_no_logs
def test_white_space_10():
    line1, line2 = white_space_lines(1000000, 'pre-line')
    box1, = line1.children
    text1, = box1.children
    assert text1.text == 'This +'
    box2, = line2.children
    text2, = box2.children
    assert text2.text == 'is text'


@assert_no_logs
def test_white_space_11():
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/813
    page, = render_pages('''
      <style>
        pre { width: 0 }
      </style>
      <body><pre>This<br/>is text''')
    html, = page.children
    body, = html.children
    pre, = body.children
    line1, line2 = pre.children
    text1, box = line1.children
    assert text1.text == 'This'
    assert box.element_tag == 'br'
    text2, = line2.children
    assert text2.text == 'is text'


@assert_no_logs
def test_white_space_12():
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/813
    page, = render_pages('''
      <style>
        pre { width: 0 }
      </style>
      <body><pre>This is <span>lol</span> text''')
    html, = page.children
    body, = html.children
    pre, = body.children
    line1, = pre.children
    text1, span, text2 = line1.children
    assert text1.text == 'This is '
    assert span.element_tag == 'span'
    assert text2.text == ' text'


@assert_no_logs
@pytest.mark.parametrize('value, width', (
    (8, 144),  # (2 + (8 - 1)) * 16
    (4, 80),  # (2 + (4 - 1)) * 16
    ('3em', 64),  # (2 + (3 - 1)) * 16
    ('25px', 41),  # 2 * 16 + 25 - 1 * 16
    # (0, 32),  # See Layout.set_tabs
))
def test_tab_size(value, width):
    page, = render_pages('''
      <style>
        @font-face {src: url(weasyprint.otf); font-family: weasyprint}
        pre { tab-size: %s; font-family: weasyprint }
      </style>
      <pre>a&#9;a</pre>
    ''' % value)
    html, = page.children
    body, = html.children
    paragraph, = body.children
    line, = paragraph.children
    assert line.width == width


@assert_no_logs
def test_text_transform():
    page, = render_pages('''
      <style>
        p { text-transform: capitalize }
        p+p { text-transform: uppercase }
        p+p+p { text-transform: lowercase }
        p+p+p+p { text-transform: full-width }
        p+p+p+p+p { text-transform: none }
      </style>
<p>hé lO1</p><p>hé lO1</p><p>hé lO1</p><p>hé lO1</p><p>hé lO1</p>
    ''')
    html, = page.children
    body, = html.children
    p1, p2, p3, p4, p5 = body.children
    line1, = p1.children
    text1, = line1.children
    assert text1.text == 'Hé Lo1'
    line2, = p2.children
    text2, = line2.children
    assert text2.text == 'HÉ LO1'
    line3, = p3.children
    text3, = line3.children
    assert text3.text == 'hé lo1'
    line4, = p4.children
    text4, = line4.children
    assert text4.text == '\uff48é\u3000\uff4c\uff2f\uff11'
    line5, = p5.children
    text5, = line5.children
    assert text5.text == 'hé lO1'


@assert_no_logs
def test_text_floating_pre_line():
    # Test regression: https://github.com/Kozea/WeasyPrint/issues/610
    page, = render_pages('''
      <div style="float: left; white-space: pre-line">This is
      oh this end </div>
    ''')


@assert_no_logs
@pytest.mark.parametrize(
    'leader, content', (
        ('dotted', '.'),
        ('solid', '_'),
        ('space', ' '),
        ('" .-"', ' .-'),
    )
)
def test_leader_content(leader, content):
    page, = render_pages('''
      <style>div::after { content: leader(%s) }</style>
      <div></div>
    ''' % leader)
    html, = page.children
    body, = html.children
    div, = body.children
    line, = div.children
    after, = line.children
    inline, = after.children
    assert inline.children[0].text == content


@pytest.mark.xfail
@assert_no_logs
def test_max_lines():
    page, = render_pages('''
      <style>
        @page {size: 10px 10px;}
        @font-face {src: url(weasyprint.otf); font-family: weasyprint}
        p {
          font-family: weasyprint;
          font-size: 2px;
          max-lines: 2;
        }
      </style>
      <p>
        abcd efgh ijkl
      </p>
    ''')
    html, = page.children
    body, = html.children
    p1, p2 = body.children
    line1, line2 = p1.children
    line3, = p2.children
    text1, = line1.children
    text2, = line2.children
    text3, = line3.children
    assert text1.text == 'abcd'
    assert text2.text == 'efgh'
    assert text3.text == 'ijkl'


@assert_no_logs
def test_continue():
    page, = render_pages('''
      <style>
        @page {size: 10px 4px;}
        @font-face {src: url(weasyprint.otf); font-family: weasyprint}
        div {
          continue: discard;
          font-family: weasyprint;
          font-size: 2px;
        }
      </style>
      <div>
        abcd efgh ijkl
      </div>
    ''')
    html, = page.children
    body, = html.children
    p, = body.children
    line1, line2 = p.children
    text1, = line1.children
    text2, = line2.children
    assert text1.text == 'abcd'
    assert text2.text == 'efgh'