# 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/>.
"""HTML formatting drivers for ureports"""
from __future__ import generators
__docformat__ = "restructuredtext en"

from logilab.common.ureports import HTMLWriter

class DocbookWriter(HTMLWriter):
    """format layouts as HTML"""

    def begin_format(self, layout):
        """begin to format a layout"""
        super(HTMLWriter, self).begin_format(layout)
        if self.snippet is None:
            self.writeln('<?xml version="1.0" encoding="ISO-8859-1"?>')
            self.writeln("""
<book xmlns:xi='http://www.w3.org/2001/XInclude'
      lang='fr'>
""")

    def end_format(self, layout):
        """finished to format a layout"""
        if self.snippet is None:
            self.writeln('</book>')

    def visit_section(self, layout):
        """display a section (using <chapter> (level 0) or <section>)"""
        if self.section == 0:
            tag = "chapter"
        else:
            tag = "section"
        self.section += 1
        self.writeln(self._indent('<%s%s>' % (tag, self.handle_attrs(layout))))
        self.format_children(layout)
        self.writeln(self._indent('</%s>'% tag))
        self.section -= 1

    def visit_title(self, layout):
        """display a title using <title>"""
        self.write(self._indent('  <title%s>' % self.handle_attrs(layout)))
        self.format_children(layout)
        self.writeln('</title>')

    def visit_table(self, layout):
        """display a table as html"""
        self.writeln(self._indent('  <table%s><title>%s</title>' \
                     % (self.handle_attrs(layout), layout.title)))
        self.writeln(self._indent('    <tgroup cols="%s">'% layout.cols))
        for i in range(layout.cols):
            self.writeln(self._indent('      <colspec colname="c%s" colwidth="1*"/>' % i))

        table_content = self.get_table_content(layout)
        # write headers
        if layout.cheaders:
            self.writeln(self._indent('      <thead>'))
            self._write_row(table_content[0])
            self.writeln(self._indent('      </thead>'))
            table_content = table_content[1:]
        elif layout.rcheaders:
            self.writeln(self._indent('      <thead>'))
            self._write_row(table_content[-1])
            self.writeln(self._indent('      </thead>'))
            table_content = table_content[:-1]
        # write body
        self.writeln(self._indent('      <tbody>'))
        for i in range(len(table_content)):
            row = table_content[i]
            self.writeln(self._indent('        <row>'))
            for j in range(len(row)):
                cell = row[j] or '&#160;'
                self.writeln(self._indent('          <entry>%s</entry>' % cell))
            self.writeln(self._indent('        </row>'))
        self.writeln(self._indent('      </tbody>'))
        self.writeln(self._indent('    </tgroup>'))
        self.writeln(self._indent('  </table>'))

    def _write_row(self, row):
        """write content of row (using <row> <entry>)"""
        self.writeln('        <row>')
        for j in range(len(row)):
            cell = row[j] or '&#160;'
            self.writeln('          <entry>%s</entry>' % cell)
        self.writeln(self._indent('        </row>'))

    def visit_list(self, layout):
        """display a list (using <itemizedlist>)"""
        self.writeln(self._indent('  <itemizedlist%s>' % self.handle_attrs(layout)))
        for row in list(self.compute_content(layout)):
            self.writeln('    <listitem><para>%s</para></listitem>' % row)
        self.writeln(self._indent('  </itemizedlist>'))

    def visit_paragraph(self, layout):
        """display links (using <para>)"""
        self.write(self._indent('  <para>'))
        self.format_children(layout)
        self.writeln('</para>')

    def visit_span(self, layout):
        """display links (using <p>)"""
        #TODO: translate in docbook
        self.write('<literal %s>' % self.handle_attrs(layout))
        self.format_children(layout)
        self.write('</literal>')

    def visit_link(self, layout):
        """display links (using <ulink>)"""
        self.write('<ulink url="%s"%s>%s</ulink>' % (layout.url,
                                               self.handle_attrs(layout),
                                               layout.label))

    def visit_verbatimtext(self, layout):
        """display verbatim text (using <programlisting>)"""
        self.writeln(self._indent('  <programlisting>'))
        self.write(layout.data.replace('&', '&amp;').replace('<', '&lt;'))
        self.writeln(self._indent('  </programlisting>'))

    def visit_text(self, layout):
        """add some text"""
        self.write(layout.data.replace('&', '&amp;').replace('<', '&lt;'))

    def _indent(self, string):
        """correctly indent string according to section"""
        return ' ' * 2*(self.section) + string