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# -*- coding: utf-8 -*-
import os
import re
import cgi
import subprocess
from os import path

from docutils import nodes

from sphinx import addnodes
from sphinx.builders.html import StandaloneHTMLBuilder

_idpattern = re.compile(
    r'(?P<title>.+) (\((?P<id>[\w\.]+)( (?P<descr>\w+))?\))$')

# Qt Help Collection Project (.qhcp).
# Is the input file for the help collection generator.
# It contains references to compressed help files which should be
# included in the collection.
# It may contain various other information for customizing Qt Assistant.
collection_template = '''\
<?xml version="1.0" encoding="utf-8" ?>
<QHelpCollectionProject version="1.0">
         <title>calibre User Manual</title>
         <enableAddressBar visible="false">true</enableAddressBar>
             <text>About calibre</text>

calibre is the one stop solution for all your e-book needs. It was created
originally by Kovid Goyal, to help him manage his e-book collection and is now
very actively developed by an international community of e-book enthusiasts.

Its goal is to empower you, the user, to do whatever you like with the e-books
in your collection. You can convert them to many different formats, read them
on your computer, send them to many different devices, edit their metadata
and covers, etc.

calibre also allows you to download news from a variety of different sources all
over the internet and read conveniently in e-books form. In keeping with its
philosophy of empowering the user, it has a simple system to allow you to add
your own favorite news sources. In fact, most the builtin news sources in
calibre were originally contributed by users.

# Qt Help Project (.qhp)
# This is the input file for the help generator.
# It contains the table of contents, indices and references to the
# actual documentation files (*.html).
# In addition it defines a unique namespace for the documentation.
project_template = '''\
<?xml version="1.0" encoding="UTF-8"?>
<QtHelpProject version="1.0">
    <customFilter name="%(project)s %(version)s">
            <section title="%(title)s" ref="%(masterdoc)s.html">

section_template = '<section title="%(title)s" ref="%(ref)s"/>'
file_template = ' '*12 + '<file>%(filename)s</file>'

00103 class QtHelpBuilder(StandaloneHTMLBuilder):
    Builder that also outputs Qt help project, contents and index files.
    name = 'qthelp'

    # don't copy the reST source
    copysource = False
    supported_image_types = ['image/svg+xml', 'image/png', 'image/gif',

    # don't add links
    add_permalinks = False
    # don't add sidebar etc.
    embedded = True

    def init(self):
        # the output files for HTML help must be .html only
        self.out_suffix = '.html'
        self.link_suffix = '.html'
        #self.config.html_style = 'traditional.css'

    def handle_finish(self):
        self.build_qhcp(self.outdir, self.config.qthelp_basename)
        self.build_qhp(self.outdir, self.config.qthelp_basename)
        self.build_qhc(self.outdir, self.config.qthelp_basename)

    def build_qhc(self, outdir, outname):
        self.info('create Qt Help Collection...')
        with open(os.path.join(outdir, 'about.txt'), 'wb') as f:
        qhcp = os.path.abspath(os.path.join(outdir, outname+'.qhcp'))
        subprocess.check_call(['qcollectiongenerator', qhcp])
        qhc = qhcp[:-5]+'.qhc'
        self.info('Qt Help Collection: '+qhc)
        self.info('To test: assistant -collectionFile '+qhc)

    def build_qhcp(self, outdir, outname):
        self.info('writing collection project file...')
        f = open(path.join(outdir, outname+'.qhcp'), 'w')
            f.write(collection_template % {'outname': outname})

    def build_qhp(self, outdir, outname):
        self.info('writing project file...')

        # sections
        tocdoc = self.env.get_and_resolve_doctree(self.config.master_doc, self,
        istoctree = lambda node: (
                        isinstance(node, addnodes.compact_paragraph)
                            and node.has_key('toctree'))
        sections = []
        for node in tocdoc.traverse(istoctree):

        if self.config.html_use_modindex:
            item = section_template % {'title': 'Global Module Index',
                                       'ref': 'modindex.html'}
            sections.append(' '*4*4 + item)
        sections = '\n'.join(sections)

        # keywords
        keywords = []
        index = self.env.create_index(self)
        for (key, group) in index:
            for title, (refs, subitems) in group:
                keywords.extend(self.build_keywords(title, refs, subitems))
        keywords = '\n'.join(keywords)

        # files
        if not outdir.endswith(os.sep):
            outdir += os.sep
        olen = len(outdir)
        projectfiles = []
        staticdir = path.join(outdir, '_static')
        imagesdir = path.join(outdir, '_images')
        for root, dirs, files in os.walk(outdir):
            resourcedir = root.startswith(staticdir) or root.startswith(imagesdir)
            for fn in files:
                if (resourcedir and not fn.endswith('.js')) or \
                    filename = path.join(root, fn)[olen:]
                    #filename = filename.replace(os.sep, '\\') # XXX
                    projectfiles.append(file_template % {'filename': filename})
        projectfiles = '\n'.join(projectfiles)

        # write the project file
        f = open(path.join(outdir, outname+'.qhp'), 'w')
            nversion = self.config.version.replace('.', '_')
            nversion = nversion.replace(' ', '_')
            f.write(project_template % {'outname': outname,
                                        'title': self.config.html_title,
                                        'version': self.config.version,
                                        'project': self.config.project,
                                        'nversion': nversion,
                                        'masterdoc': self.config.master_doc,
                                        'sections': sections,
                                        'keywords': keywords,
                                        'files': projectfiles})

    def isdocnode(self, node):
        if not isinstance(node, nodes.list_item):
            return False
        if len(node.children) != 2:
            return False
        if not isinstance(node.children[0], addnodes.compact_paragraph):
            return False
        if not isinstance(node.children[0][0], nodes.reference):
            return False
        if not isinstance(node.children[1], nodes.bullet_list):
            return False
        return True

    def write_toc(self, node, indentlevel=4):
        parts = []
        if self.isdocnode(node):
            refnode = node.children[0][0]
            link = refnode['refuri']
            title = cgi.escape(refnode.astext()).replace('"','&quot;')
            item = '<section title="%(title)s" ref="%(ref)s">' % {
                                                                'title': title,
                                                                'ref': link}
            parts.append(' '*4*indentlevel + item)
            for subnode in node.children[1]:
                parts.extend(self.write_toc(subnode, indentlevel+1))
            parts.append(' '*4*indentlevel + '</section>')
        elif isinstance(node, nodes.list_item):
            for subnode in node:
                parts.extend(self.write_toc(subnode, indentlevel))
        elif isinstance(node, nodes.reference):
            link = node['refuri']
            title = cgi.escape(node.astext()).replace('"','&quot;')
            item = section_template % {'title': title, 'ref': link}
            item = ' '*4*indentlevel + item.encode('ascii', 'xmlcharrefreplace')
            parts.append(item.encode('ascii', 'xmlcharrefreplace'))
        elif isinstance(node, nodes.bullet_list):
            for subnode in node:
                parts.extend(self.write_toc(subnode, indentlevel))
        elif isinstance(node, addnodes.compact_paragraph):
            for subnode in node:
                parts.extend(self.write_toc(subnode, indentlevel))

        return parts

    def keyword_item(self, name, ref):
        matchobj = _idpattern.match(name)
        if matchobj:
            groupdict = matchobj.groupdict()
            shortname = groupdict['title']
            id = groupdict.get('id')
#            descr = groupdict.get('descr')
            if shortname.endswith('()'):
                shortname = shortname[:-2]
            id = '%s.%s' % (id, shortname)
            id = None

        if id:
            item = ' '*12 + '<keyword name="%s" id="%s" ref="%s"/>' % (
                                                                name, id, ref)
            item = ' '*12 + '<keyword name="%s" ref="%s"/>' % (name, ref)
        item.encode('ascii', 'xmlcharrefreplace')
        return item

    def build_keywords(self, title, refs, subitems):
        keywords = []

        title = cgi.escape(title)
#        if len(refs) == 0: # XXX
#            write_param('See Also', title)
        if len(refs) == 1:
            keywords.append(self.keyword_item(title, refs[0]))
        elif len(refs) > 1:
            for i, ref in enumerate(refs):  # XXX
#                item = (' '*12 +
#                        '<keyword name="%s [%d]" ref="%s"/>' % (
#                                                        title, i, ref))
#                item.encode('ascii', 'xmlcharrefreplace')
#                keywords.append(item)
                keywords.append(self.keyword_item(title, ref))

        if subitems:
            for subitem in subitems:
                keywords.extend(self.build_keywords(subitem[0], subitem[1], []))

        return keywords

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