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# Source code for sphinx.builders.changes

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

        Changelog builder.

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

    import codecs
    from os import path

    from six import iteritems

    from sphinx import package_dir
    from sphinx.util import copy_static_entry
    from sphinx.locale import _
    from sphinx.theming import Theme
    from sphinx.builders import Builder
    from sphinx.util.osutil import ensuredir, os_path
    from sphinx.util.console import bold
    from sphinx.util.pycompat import htmlescape

    class ChangesBuilder(Builder):
        """
        Write a summary with all versionadded/changed directives.
        """
        name = 'changes'

        def init(self):
            self.create_template_bridge()
            Theme.init_themes(self.confdir, self.config.html_theme_path,
                              warn=self.warn)
            self.theme = Theme('default')
            self.templates.init(self, self.theme)

        def get_outdated_docs(self):
            return self.outdir

        typemap = {
            'versionadded': 'added',
            'versionchanged': 'changed',
            'deprecated': 'deprecated',
        }

        def write(self, *ignored):
            version = self.config.version
            libchanges = {}
            apichanges = []
            otherchanges = {}
            if version not in self.env.versionchanges:
                self.info(bold('no changes in version %s.' % version))
                return
            self.info(bold('writing summary file...'))
            for type, docname, lineno, module, descname, content in \
                    self.env.versionchanges[version]:
                if isinstance(descname, tuple):
                    descname = descname[0]
                ttext = self.typemap[type]
                context = content.replace('\n', ' ')
                if descname and docname.startswith('c-api'):
                    if not descname:
                        continue
                    if context:
                        entry = '<b>%s</b>: <i>%s:</i> %s' % (descname, ttext,
                                                              context)
                    else:
                        entry = '<b>%s</b>: <i>%s</i>.' % (descname, ttext)
                    apichanges.append((entry, docname, lineno))
                elif descname or module:
                    if not module:
                        module = _('Builtins')
                    if not descname:
                        descname = _('Module level')
                    if context:
                        entry = '<b>%s</b>: <i>%s:</i> %s' % (descname, ttext,
                                                              context)
                    else:
                        entry = '<b>%s</b>: <i>%s</i>.' % (descname, ttext)
                    libchanges.setdefault(module, []).append((entry, docname,
                                                              lineno))
                else:
                    if not context:
                        continue
                    entry = '<i>%s:</i> %s' % (ttext.capitalize(), context)
                    title = self.env.titles[docname].astext()
                    otherchanges.setdefault((docname, title), []).append(
                        (entry, docname, lineno))

            ctx = {
                'project': self.config.project,
                'version': version,
                'docstitle': self.config.html_title,
                'shorttitle': self.config.html_short_title,
                'libchanges': sorted(iteritems(libchanges)),
                'apichanges': sorted(apichanges),
                'otherchanges': sorted(iteritems(otherchanges)),
                'show_copyright': self.config.html_show_copyright,
                'show_sphinx': self.config.html_show_sphinx,
            }
            f = codecs.open(path.join(self.outdir, 'index.html'), 'w', 'utf8')
            try:
                f.write(self.templates.render('changes/frameset.html', ctx))
            finally:
                f.close()
            f = codecs.open(path.join(self.outdir, 'changes.html'), 'w', 'utf8')
            try:
                f.write(self.templates.render('changes/versionchanges.html', ctx))
            finally:
                f.close()

            hltext = ['.. versionadded:: %s' % version,
                      '.. versionchanged:: %s' % version,
                      '.. deprecated:: %s' % version]

            def hl(no, line):
                line = '<a name="L%s"> </a>' % no + htmlescape(line)
                for x in hltext:
                    if x in line:
                        line = '<span class="hl">%s</span>' % line
                        break
                return line

            self.info(bold('copying source files...'))
            for docname in self.env.all_docs:
                f = codecs.open(self.env.doc2path(docname), 'r',
                                self.env.config.source_encoding)
                try:
                    lines = f.readlines()
                except UnicodeDecodeError:
                    self.warn('could not read %r for changelog creation' % docname)
                    continue
                finally:
                    f.close()
                targetfn = path.join(self.outdir, 'rst', os_path(docname)) + '.html'
                ensuredir(path.dirname(targetfn))
                f = codecs.open(targetfn, 'w', 'utf-8')
                try:
                    text = ''.join(hl(i+1, line) for (i, line) in enumerate(lines))
                    ctx = {
                        'filename': self.env.doc2path(docname, None),
                        'text': text
                    }
                    f.write(self.templates.render('changes/rstsource.html', ctx))
                finally:
                    f.close()
            themectx = dict(('theme_' + key, val) for (key, val) in
                            iteritems(self.theme.get_options({})))
            copy_static_entry(path.join(package_dir, 'themes', 'default',
                                        'static', 'default.css_t'),
                              self.outdir, self, themectx)
            copy_static_entry(path.join(package_dir, 'themes', 'basic',
                                        'static', 'basic.css'),
                              self.outdir, self)

        def hl(self, text, version):
            text = htmlescape(text)
            for directive in ['versionchanged', 'versionadded', 'deprecated']:
                text = text.replace('.. %s:: %s' % (directive, version),
                                    '<b>.. %s:: %s</b>' % (directive, version))
            return text

        def finish(self):
            pass