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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of logilab-common.
#
# logilab-common is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option) any
# later version.
#
# logilab-common is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with logilab-common. If not, see <http://www.gnu.org/licenses/>.
"""Universal report objects and some formatting drivers.
A way to create simple reports using python objects, primarily designed to be
formatted as text and html.
"""
from __future__ import generators
__docformat__ = "restructuredtext en"
import sys
from cStringIO import StringIO
from StringIO import StringIO as UStringIO
from logilab.common.textutils import linesep
def get_nodes(node, klass):
"""return an iterator on all children node of the given klass"""
for child in node.children:
if isinstance(child, klass):
yield child
# recurse (FIXME: recursion controled by an option)
for grandchild in get_nodes(child, klass):
yield grandchild
def layout_title(layout):
"""try to return the layout's title as string, return None if not found
"""
for child in layout.children:
if isinstance(child, Title):
return ' '.join([node.data for node in get_nodes(child, Text)])
def build_summary(layout, level=1):
"""make a summary for the report, including X level"""
assert level > 0
level -= 1
summary = List(klass='summary')
for child in layout.children:
if not isinstance(child, Section):
continue
label = layout_title(child)
if not label and not child.id:
continue
if not child.id:
child.id = label.replace(' ', '-')
node = Link('#'+child.id, label=label or child.id)
# FIXME: Three following lines produce not very compliant
# docbook: there are some useless <para><para>. They might be
# replaced by the three commented lines but this then produces
# a bug in html display...
if level and [n for n in child.children if isinstance(n, Section)]:
node = Paragraph([node, build_summary(child, level)])
summary.append(node)
# summary.append(node)
# if level and [n for n in child.children if isinstance(n, Section)]:
# summary.append(build_summary(child, level))
return summary
class BaseWriter(object):
"""base class for ureport writers"""
def format(self, layout, stream=None, encoding=None):
"""format and write the given layout into the stream object
unicode policy: unicode strings may be found in the layout;
try to call stream.write with it, but give it back encoded using
the given encoding if it fails
"""
if stream is None:
stream = sys.stdout
if not encoding:
encoding = getattr(stream, 'encoding', 'UTF-8')
self.encoding = encoding or 'UTF-8'
self.__compute_funcs = []
self.out = stream
self.begin_format(layout)
layout.accept(self)
self.end_format(layout)
def format_children(self, layout):
"""recurse on the layout children and call their accept method
(see the Visitor pattern)
"""
for child in getattr(layout, 'children', ()):
child.accept(self)
def writeln(self, string=''):
"""write a line in the output buffer"""
self.write(string + linesep)
def write(self, string):
"""write a string in the output buffer"""
try:
self.out.write(string)
except UnicodeEncodeError:
self.out.write(string.encode(self.encoding))
def begin_format(self, layout):
"""begin to format a layout"""
self.section = 0
def end_format(self, layout):
"""finished to format a layout"""
def get_table_content(self, table):
"""trick to get table content without actually writing it
return an aligned list of lists containing table cells values as string
"""
result = [[]]
cols = table.cols
for cell in self.compute_content(table):
if cols == 0:
result.append([])
cols = table.cols
cols -= 1
result[-1].append(cell)
# fill missing cells
while len(result[-1]) < cols:
result[-1].append('')
return result
def compute_content(self, layout):
"""trick to compute the formatting of children layout before actually
writing it
return an iterator on strings (one for each child element)
"""
# use cells !
def write(data):
try:
stream.write(data)
except UnicodeEncodeError:
stream.write(data.encode(self.encoding))
def writeln(data=''):
try:
stream.write(data+linesep)
except UnicodeEncodeError:
stream.write(data.encode(self.encoding)+linesep)
self.write = write
self.writeln = writeln
self.__compute_funcs.append((write, writeln))
for child in layout.children:
stream = UStringIO()
child.accept(self)
yield stream.getvalue()
self.__compute_funcs.pop()
try:
self.write, self.writeln = self.__compute_funcs[-1]
except IndexError:
del self.write
del self.writeln
from logilab.common.ureports.nodes import *
from logilab.common.ureports.text_writer import TextWriter
from logilab.common.ureports.html_writer import HTMLWriter
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