class PDFPage(object):
""" Defines the structure of an individual page.
Margins are set by default. If you want to change
them, it should be done through the Document object,
or before any content is written to the page.
"""
def __init__(self, orientation="P", layout="letter"):
# Additional layout sizes may be added to this dictionary.
# Width then height, in pixels, in portrait orientation.
self.layoutdict = {'a3': (841.89, 1190.55),
'a4': (595.28, 841.89),
'a5': (420.94, 595.28),
'letter': (612, 792),
'legal': (612, 1008),
'11x17': (792, 1224)
}
self._setPageSize(layout)
# "P" or "L"
self.orientation = orientation
# Each page has a cursor.
self.cursor = PDFCursor()
# Initialize the Page Margin.
self.margin = None
self.setOrientation(orientation)
self.setMargins()
self.orientation_change = False
self.buffer = ""
def _compress(self):
""" Uses zlib to compress page buffers. Compression
option is enabled through PDFLite object's
setCompression method.
"""
self.buffer = compress(self.buffer)
def _setIndex(self, value):
self.index = value
def _setPageSize(self, layout):
self.layout = layout.lower()
if self.layout in self.layoutdict:
self.pagesize = self.layoutdict[self.layout]
else:
raise Exception('Unknown page layout: ', self.layout)
def _setDimensions(self):
self.width = self.size[0]
self.height = self.size[1]
def setOrientation(self, orientation="P"):
self.orientation = orientation.lower()
if(self.orientation == 'p' or self.orientation == 'portrait'):
self.size = self.pagesize
elif(self.orientation == 'l' or self.orientation == 'landscape'):
self.size = (self.pagesize[1], self.pagesize[0])
else:
raise Exception('Incorrect orientation: ', self.orientation)
self._setDimensions()
self._setBounds()
def changeOrientation(self):
if self.orientation_change is False:
self.size = (self.size[1], self.size[0])
self.orientation_change = True
self._setDimensions()
self._setBounds()
else:
pass
def setMargins(self, margin=None):
if margin is None:
self.margin = PDFMargin()
elif isinstance(margin, PDFMargin):
self.margin = margin
else:
raise Exception("Invalid Margin object")
self._setDimensions()
self._setBounds()
def _setBounds(self):
if self.margin is None:
xmin = 0
xmax = self.size[0]
ymin = self.size[1]
ymax = 0
else:
xmin = 0 + self.margin.l
xmax = self.size[0] - self.margin.r
ymin = self.size[1] - self.margin.t
ymax = 0 + self.margin.b
self.cursor.setBounds(xmin, ymin, xmax, ymax)
def addNewline(self, font, number=1):
self.cursor.yPlus((font.linesize*number))
self.cursor.xReset()
def addIndent(self, font, number=4):
self.cursor.xPlus(number * font.stringWidth(' '))
