Kozea/WeasyPrint
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Code Issues Projects Releases Wiki Activity

Initial support of leaders

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This commit is contained in:
Guillaume Ayoub 2021-01-09 16:37:50 +01:00
parent 8a4a696175
commit ff9888285c
3 changed files with 47 additions and 0 deletions
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1
weasyprint/formatting_structure/boxes.py
View File

@ -80,6 +80,7 @@ class Box:
transformation_matrix = None
bookmark_label = None
string_set = None
leader_string = None
# Default, overriden on some subclasses
def all_children(self):

4
weasyprint/formatting_structure/build.py
View File

@ -527,6 +527,10 @@ def compute_content_list(content_list, parent_box, counter_values, css_token,
get_image_from_uri, target_collector, counter_style,
context=context, page=page)
boxlist.append(new_box)
elif type_ == 'leader()':
leader_box = boxes.InlineBox.anonymous_from(parent_box, [])
leader_box.leader_string = value[1]
boxlist.append(leader_box)
text = ''.join(texts)
if text:
boxlist.append(boxes.TextBox.anonymous_from(parent_box, text))

42
weasyprint/layout/inlines.py
View File

@ -49,6 +49,7 @@ def iter_line_boxes(context, box, position_y, skip_stack, containing_block,
context, box, position_y, skip_stack, containing_block,
absolute_boxes, fixed_boxes, first_letter_style)
if line:
handle_leaders(context, line, containing_block)
position_y = line.position_y + line.height
if line is None:
return
@ -60,6 +61,47 @@ def iter_line_boxes(context, box, position_y, skip_stack, containing_block,
first_letter_style = None
def handle_leaders(context, line, containing_block):
after_leader = False
children = []
for child in tuple(line.descendants()):
if child.leader_string:
after_leader = True
available_width = containing_block.width - line.width
line.width = containing_block.width
child.width = available_width
text_box = boxes.TextBox.anonymous_from(child, child.leader_string)
resolve_percentages(text_box, containing_block)
text_box, _, _ = split_text_box(
context, text_box, float('inf'), None)
number_of_leaders = int(line.width // text_box.width)
for i in range(number_of_leaders):
text_box = boxes.TextBox.anonymous_from(
child, child.leader_string)
resolve_percentages(text_box, containing_block)
text_box, _, _ = split_text_box(
context, text_box, float('inf'), None)
text_box.position_x = (
line.position_x + line.width - ((i + 1) * text_box.width))
text_box.position_y = child.position_y
if text_box.position_x < child.position_x:
# Don’t add leaders behind the text on the left
continue
elif (text_box.position_x + text_box.width >
child.position_x + available_width):
# Don’t add leaders behind the text on the right
continue
children.append(text_box)
child.children = tuple(children)
continue
if after_leader:
child.position_x += available_width
def get_next_linebox(context, linebox, position_y, skip_stack,
containing_block, absolute_boxes, fixed_boxes,
first_letter_style):