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# Source code for sphinx.builders.qthelp

    # -*- coding: utf-8 -*-
    """
        sphinx.builders.qthelp
        ~~~~~~~~~~~~~~~~~~~~~~

        Build input files for the Qt collection generator.

        :copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
        :license: BSD, see LICENSE for details.
    """

    import os
    import re
    import codecs
    import posixpath
    from os import path

    from six import text_type
    from docutils import nodes

    from sphinx import addnodes
    from sphinx.builders.html import StandaloneHTMLBuilder
    from sphinx.util import force_decode
    from sphinx.util.pycompat import htmlescape

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

    # 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 = u'''\
    <?xml version="1.0" encoding="utf-8" ?>
    <QHelpCollectionProject version="1.0">
        <assistant>
            <title>%(title)s</title>
            <homePage>%(homepage)s</homePage>
            <startPage>%(startpage)s</startPage>
        </assistant>
        <docFiles>
            <generate>
                <file>
                    <input>%(outname)s.qhp</input>
                    <output>%(outname)s.qch</output>
                </file>
            </generate>
            <register>
                <file>%(outname)s.qch</file>
            </register>
        </docFiles>
    </QHelpCollectionProject>
    '''

    # 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 = u'''\
    <?xml version="1.0" encoding="utf-8" ?>
    <QtHelpProject version="1.0">
        <namespace>%(namespace)s</namespace>
        <virtualFolder>doc</virtualFolder>
        <customFilter name="%(project)s %(version)s">
            <filterAttribute>%(outname)s</filterAttribute>
            <filterAttribute>%(version)s</filterAttribute>
        </customFilter>
        <filterSection>
            <filterAttribute>%(outname)s</filterAttribute>
            <filterAttribute>%(version)s</filterAttribute>
            <toc>
                <section title="%(title)s" ref="%(masterdoc)s.html">
    %(sections)s
                </section>
            </toc>
            <keywords>
    %(keywords)s
            </keywords>
            <files>
    %(files)s
            </files>
        </filterSection>
    </QtHelpProject>
    '''

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

    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',
                                 'image/jpeg']

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

        def init(self):
            StandaloneHTMLBuilder.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_qhp(self.outdir, self.config.qthelp_basename)

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

            # sections
            tocdoc = self.env.get_and_resolve_doctree(self.config.master_doc, self,
                                                      prune_toctrees=False)

            def istoctree(node):
                return isinstance(node, addnodes.compact_paragraph) and \
                    'toctree' in node
            sections = []
            for node in tocdoc.traverse(istoctree):
                sections.extend(self.write_toc(node))

            for indexname, indexcls, content, collapse in self.domain_indices:
                item = section_template % {'title': indexcls.localname,
                                           'ref': '%s.html' % indexname}
                sections.append(' ' * 4 * 4 + item)
            # sections may be unicode strings or byte strings, we have to make sure
            # they are all unicode strings before joining them
            new_sections = []
            for section in sections:
                if not isinstance(section, text_type):
                    new_sections.append(force_decode(section, None))
                else:
                    new_sections.append(section)
            sections = u'\n'.join(new_sections)

            # keywords
            keywords = []
            index = self.env.create_index(self, group_entries=False)
            for (key, group) in index:
                for title, (refs, subitems, key_) in group:
                    keywords.extend(self.build_keywords(title, refs, subitems))
            keywords = u'\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, self.imagedir)
            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 \
                       fn.endswith('.html'):
                        filename = path.join(root, fn)[olen:]
                        projectfiles.append(file_template %
                                            {'filename': htmlescape(filename)})
            projectfiles = '\n'.join(projectfiles)

            # it seems that the "namespace" may not contain non-alphanumeric
            # characters, and more than one successive dot, or leading/trailing
            # dots, are also forbidden
            nspace = 'org.sphinx.%s.%s' % (outname, self.config.version)
            nspace = re.sub('[^a-zA-Z0-9.]', '', nspace)
            nspace = re.sub(r'\.+', '.', nspace).strip('.')
            nspace = nspace.lower()

            # write the project file
            f = codecs.open(path.join(outdir, outname+'.qhp'), 'w', 'utf-8')
            try:
                f.write(project_template % {
                    'outname': htmlescape(outname),
                    'title': htmlescape(self.config.html_title),
                    'version': htmlescape(self.config.version),
                    'project': htmlescape(self.config.project),
                    'namespace': htmlescape(nspace),
                    'masterdoc': htmlescape(self.config.master_doc),
                    'sections': sections,
                    'keywords': keywords,
                    'files': projectfiles})
            finally:
                f.close()

            homepage = 'qthelp://' + posixpath.join(
                nspace, 'doc', self.get_target_uri(self.config.master_doc))
            startpage = 'qthelp://' + posixpath.join(nspace, 'doc', 'index.html')

            self.info('writing collection project file...')
            f = codecs.open(path.join(outdir, outname+'.qhcp'), 'w', 'utf-8')
            try:
                f.write(collection_template % {
                    'outname': htmlescape(outname),
                    'title': htmlescape(self.config.html_short_title),
                    'homepage': htmlescape(homepage),
                    'startpage': htmlescape(startpage)})
            finally:
                f.close()

        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):
            # XXX this should return a Unicode string, not a bytestring
            parts = []
            if self.isdocnode(node):
                refnode = node.children[0][0]
                link = refnode['refuri']
                title = htmlescape(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 = htmlescape(node.astext()).replace('"', '&quot;')
                item = section_template % {'title': title, 'ref': link}
                item = u' ' * 4 * indentlevel + item
                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)
            else:
                id = None

            if id:
                item = ' '*12 + '<keyword name="%s" id="%s" ref="%s"/>' % (
                    name, id, ref[1])
            else:
                item = ' '*12 + '<keyword name="%s" ref="%s"/>' % (name, ref[1])
            item.encode('ascii', 'xmlcharrefreplace')
            return item

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

            title = htmlescape(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