Add the missing file :p

weasyprint/layout/float.py

@@ -0,0 +1,93 @@
+# coding: utf8
+"""
+    weasyprint.float
+    ----------------
+
+    :copyright: Copyright 2011-2012 Simon Sapin and contributors, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import division, unicode_literals
+
+from .absolute import absolute_layout
+from .inlines import replaced_box_width, replaced_box_height
+from .percentages import resolve_percentages, resolve_position_percentages
+from .preferred import shrink_to_fit
+from ..formatting_structure import boxes
+
+
+class FloatPlaceholder(object):
+    """Left where an float box was taken out of the flow."""
+    def __init__(self, box):
+        # Work around the overloaded __setattr__
+        object.__setattr__(self, '_box', box)
+        object.__setattr__(self, '_layout_done', False)
+
+    def set_laid_out_box(self, new_box):
+        object.__setattr__(self, '_box', new_box)
+        object.__setattr__(self, '_layout_done', True)
+
+    def translate(self, dx=0, dy=0):
+        if self._layout_done:
+            self._box.translate(dx, dy)
+        else:
+            # Descendants do not have a position yet.
+            self._box.position_x += dx
+            self._box.position_y += dy
+
+    def copy(self):
+        new_placeholder = FloatPlaceholder(self._box.copy())
+        object.__setattr__(new_placeholder, '_layout_done', self._layout_done)
+        return new_placeholder
+
+    # Pretend to be the box itself
+    def __getattr__(self, name):
+        return getattr(self._box, name)
+
+    def __setattr__(self, name, value):
+        setattr(self._box, name, value)
+
+
+def float_layout(document, placeholder, containing_block, absolute_boxes):
+    """Set the width and position of floating ``box``."""
+    box = placeholder._box
+
+    cb = containing_block
+    cb_x = cb.content_box_x()
+    cb_y = cb.content_box_y()
+    cb_width = cb.width
+    cb_height = cb.height
+
+    resolve_percentages(box, (cb_width, cb_height))
+    resolve_position_percentages(box, (cb_width, cb_height))
+
+    if box.margin_left == 'auto':
+        box.margin_left = 0
+    if box.margin_right == 'auto':
+        box.margin_right = 0
+
+    if box.width == 'auto':
+        if isinstance(box, boxes.BlockReplacedBox):
+            box.width = replaced_box_width(box, None)
+            box.height = replaced_box_height(box, None)
+        else:
+            box.width = shrink_to_fit(box, containing_block.width)
+
+    # avoid a circular import
+    from .blocks import block_container_layout
+    new_box, _, _, _, _ = block_container_layout(
+        document, box, max_position_y=float('inf'),
+        skip_stack=None, device_size=None, page_is_empty=False,
+        absolute_boxes=absolute_boxes, adjoining_margins=None)
+
+    for child_placeholder in absolute_boxes:
+        absolute_layout(document, child_placeholder, new_box)
+
+    if new_box.style.float == 'left':
+        new_box.position_x = cb_x
+    else:
+        assert new_box.style.float == 'right'
+        new_box.position_x = cb_x - new_box.margin_width()
+
+    placeholder.set_laid_out_box(new_box)