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56 lines
2.0 KiB
Python
56 lines
2.0 KiB
Python
# coding: utf8
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"""
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weasyprint.layout.markers
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-------------------------
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Layout for list markers (for ``display: list-item``).
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:copyright: Copyright 2011-2013 Simon Sapin and contributors, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from __future__ import division, unicode_literals
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from .percentages import resolve_percentages
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from .replaced import image_marker_layout
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from ..text import split_first_line
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from ..formatting_structure import boxes
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def list_marker_layout(context, box):
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"""Lay out the list markers of ``box``."""
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# List markers can be either 'inside' or 'outside'.
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# Inside markers are layed out just like normal inline content, but
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# outside markers need specific layout.
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# TODO: implement outside markers in terms of absolute positioning,
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# see CSS3 lists.
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marker = getattr(box, 'outside_list_marker', None)
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if marker:
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resolve_percentages(marker, containing_block=box)
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if isinstance(marker, boxes.TextBox):
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(marker.pango_layout, _, _, marker.width, marker.height,
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marker.baseline) = split_first_line(
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marker.text, marker.style, context.enable_hinting,
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max_width=None, line_width=None)
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else:
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# Image marker
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image_marker_layout(marker)
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# Align the top of the marker box with the top of its list-item’s
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# content-box.
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# TODO: align the baselines of the first lines instead?
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marker.position_y = box.content_box_y()
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# ... and its right with the left of its list-item’s padding box.
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# (Swap left and right for right-to-left text.)
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marker.position_x = box.border_box_x()
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half_em = 0.5 * box.style.font_size
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direction = box.style.direction
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if direction == 'ltr':
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marker.margin_right = half_em
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marker.position_x -= marker.margin_width()
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else:
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marker.margin_left = half_em
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marker.position_x += box.border_width()
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