def canvas(self, margin=0, border=False, clip=False):
"""
Return a canvas object for the whole page except a predefined
set of margins.
The margin parameter may be either:
- an integer - all four margins the same
- a pair - ( horizontal, vertical, )
- a 4-tuple - ( left, top, right, bottom, )
"""
if type(margin) == tuple:
if len(margin) == 2:
h, v = margin
margin = ( h, v, h, v, )
else:
m = float(margin)
margin = ( m, m, m, m, )
l, t, r, b = margin
from psg.drawing.box import canvas
ret = canvas(self, l, b,
self.w() - r - l, self.h() - t - b,
border, clip)
return ret
def render(self, layout_box):
if self.splitable:
# Check if there is room in the layout box for at least one line
min_height = self.style.v_padding() + self.style.v_margin() + \
self.style.font_size * self.style.line_height
else:
min_height = self.height(layout_box.w())
if layout_box.y_cursor() < min_height:
return self
needed_height = self.height(layout_box.w())
if layout_box.y_cursor() < needed_height:
height = layout_box.y_cursor()
else:
height = needed_height
margin_box = canvas(
layout_box,
self.style.margin_left,
layout_box.y_cursor() - height + self.style.margin_bottom,
layout_box.w() - self.style.h_margin(),
height - self.style.v_margin(),
debug.verbose)
layout_box.append(margin_box)
self.border_and_background(margin_box)
if self.style.hv_padding() == 0:
x = 0
y = 0
w = margin_box.w()
h = margin_box.h()
else:
x = self.style.padding_left
y = self.style.padding_bottom
w = margin_box.w() - self.style.h_padding()
h = margin_box.h() - self.style.v_padding()
if self.style.font.metrics.descender is not None:
y -= float(self.style.font.metrics.descender) \
* self.style.font_size / 1000
# Create a textbox
rest = self.typeset(margin_box, x, y, w, h)
if rest != "":
rest = div(rest, self.style)
else:
rest = None
layout_box.y_advance(min(height, layout_box.y_cursor()))
return rest
def render(self, layout_box):
if self.splitable:
# Check if there is room in the layout box for at least one line
min_height = self.style.v_padding() + self.style.v_margin() + \
self.style.font_size * self.style.line_height
else:
min_height = self.height(layout_box.w())
if layout_box.y_cursor() < min_height:
return self
needed_height = self.height(layout_box.w())
if layout_box.y_cursor() < needed_height:
height = layout_box.y_cursor()
else:
height = needed_height
margin_box = canvas(
layout_box, self.style.margin_left,
layout_box.y_cursor() - height + self.style.margin_bottom,
layout_box.w() - self.style.h_margin(),
height - self.style.v_margin(), debug.verbose)
layout_box.append(margin_box)
self.border_and_background(margin_box)
if self.style.hv_padding() == 0:
x = 0
y = 0
w = margin_box.w()
h = margin_box.h()
else:
x = self.style.padding_left
y = self.style.padding_bottom
w = margin_box.w() - self.style.h_padding()
h = margin_box.h() - self.style.v_padding()
if self.style.font.metrics.descender is not None:
y -= float(self.style.font.metrics.descender) \
* self.style.font_size / 1000
# Create a textbox
rest = self.typeset(margin_box, x, y, w, h)
if rest != "":
rest = div(rest, self.style)
else:
rest = None
layout_box.y_advance(min(height, layout_box.y_cursor()))
return rest
def thumb_box_factory(output_document, paper_size_name, margin_width,
thumbs_per_page, thumb_width, thumb_height,thumb_spacing,
verbose, **kw):
while True:
page = output_document.page(page_size=paper_size_name)
canvas = page.canvas(margin_width, border=False)
for a in range(thumbs_per_page-1, -1, -1):
thumb_box = box.canvas(canvas,
0, a * ( thumb_height + thumb_spacing ),
thumb_width, thumb_height,
border=verbose, clipping=True)
canvas.append(thumb_box)
yield thumb_box
def thumb_box_factory(output_document, paper_size_name, margin_width,
thumbs_per_page, thumb_width, thumb_height,
thumb_spacing, verbose, **kw):
while True:
page = output_document.page(page_size=paper_size_name)
canvas = page.canvas(margin_width, border=False)
for a in range(thumbs_per_page - 1, -1, -1):
thumb_box = box.canvas(canvas,
0,
a * (thumb_height + thumb_spacing),
thumb_width,
thumb_height,
border=verbose,
clipping=True)
canvas.append(thumb_box)
yield thumb_box
