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# Source code for sphinx.builders.latex

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

        LaTeX builder.

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

    import os
    from os import path
    import warnings

    from six import iteritems
    from docutils import nodes
    from docutils.io import FileOutput
    from docutils.utils import new_document
    from docutils.frontend import OptionParser

    from sphinx import package_dir, addnodes
    from sphinx.util import texescape
    from sphinx.errors import SphinxError
    from sphinx.locale import _
    from sphinx.builders import Builder
    from sphinx.environment import NoUri
    from sphinx.util.nodes import inline_all_toctrees
    from sphinx.util.osutil import SEP, copyfile
    from sphinx.util.console import bold, darkgreen
    from sphinx.writers.latex import LaTeXWriter

    class LaTeXBuilder(Builder):
        """
        Builds LaTeX output to create PDF.
        """
        name = 'latex'
        format = 'latex'
        supported_image_types = ['application/pdf', 'image/png', 'image/jpeg']
        usepackages = []

        def init(self):
            self.docnames = []
            self.document_data = []
            texescape.init()
            self.check_options()

        def check_options(self):
            if self.config.latex_toplevel_sectioning not in (None, 'part', 'chapter', 'section'):
                self.warn('invalid latex_toplevel_sectioning, ignored: %s' %
                          self.config.latex_top_sectionlevel)
                self.config.latex_top_sectionlevel = None

            if self.config.latex_use_parts:
                warnings.warn('latex_use_parts will be removed at Sphinx-1.5. '
                              'Use latex_toplevel_sectioning instead.',
                              DeprecationWarning)

                if self.config.latex_toplevel_sectioning:
                    self.warn('latex_use_parts conflicts with latex_toplevel_sectioning, ignored.')

        def get_outdated_docs(self):
            return 'all documents'  # for now

        def get_target_uri(self, docname, typ=None):
            if docname not in self.docnames:
                raise NoUri
            else:
                return '%' + docname

        def get_relative_uri(self, from_, to, typ=None):
            # ignore source path
            return self.get_target_uri(to, typ)

        def init_document_data(self):
            preliminary_document_data = [list(x) for x in self.config.latex_documents]
            if not preliminary_document_data:
                self.warn('no "latex_documents" config value found; no documents '
                          'will be written')
                return
            # assign subdirs to titles
            self.titles = []
            for entry in preliminary_document_data:
                docname = entry[0]
                if docname not in self.env.all_docs:
                    self.warn('"latex_documents" config value references unknown '
                              'document %s' % docname)
                    continue
                self.document_data.append(entry)
                if docname.endswith(SEP+'index'):
                    docname = docname[:-5]
                self.titles.append((docname, entry[2]))

        def write(self, *ignored):
            docwriter = LaTeXWriter(self)
            docsettings = OptionParser(
                defaults=self.env.settings,
                components=(docwriter,),
                read_config_files=True).get_default_values()

            self.init_document_data()

            for entry in self.document_data:
                docname, targetname, title, author, docclass = entry[:5]
                toctree_only = False
                if len(entry) > 5:
                    toctree_only = entry[5]
                destination = FileOutput(
                    destination_path=path.join(self.outdir, targetname),
                    encoding='utf-8')
                self.info("processing " + targetname + "... ", nonl=1)
                toctrees = self.env.get_doctree(docname).traverse(addnodes.toctree)
                if toctrees:
                    if toctrees[0].get('maxdepth') > 0:
                        tocdepth = toctrees[0].get('maxdepth')
                    else:
                        tocdepth = None
                else:
                    tocdepth = None
                doctree = self.assemble_doctree(
                    docname, toctree_only,
                    appendices=((docclass != 'howto') and self.config.latex_appendices or []))
                doctree['tocdepth'] = tocdepth
                self.post_process_images(doctree)
                self.info("writing... ", nonl=1)
                doctree.settings = docsettings
                doctree.settings.author = author
                doctree.settings.title = title
                doctree.settings.contentsname = self.get_contentsname(docname)
                doctree.settings.docname = docname
                doctree.settings.docclass = docclass
                docwriter.write(doctree, destination)
                self.info("done")

        def get_contentsname(self, indexfile):
            tree = self.env.get_doctree(indexfile)
            contentsname = None
            for toctree in tree.traverse(addnodes.toctree):
                if toctree['caption']:
                    contentsname = toctree['caption']
                    break

            return contentsname

        def assemble_doctree(self, indexfile, toctree_only, appendices):
            self.docnames = set([indexfile] + appendices)
            self.info(darkgreen(indexfile) + " ", nonl=1)
            tree = self.env.get_doctree(indexfile)
            tree['docname'] = indexfile
            if toctree_only:
                # extract toctree nodes from the tree and put them in a
                # fresh document
                new_tree = new_document('<latex output>')
                new_sect = nodes.section()
                new_sect += nodes.title(u'<Set title in conf.py>',
                                        u'<Set title in conf.py>')
                new_tree += new_sect
                for node in tree.traverse(addnodes.toctree):
                    new_sect += node
                tree = new_tree
            largetree = inline_all_toctrees(self, self.docnames, indexfile, tree,
                                            darkgreen, [indexfile])
            largetree['docname'] = indexfile
            for docname in appendices:
                appendix = self.env.get_doctree(docname)
                appendix['docname'] = docname
                largetree.append(appendix)
            self.info()
            self.info("resolving references...")
            self.env.resolve_references(largetree, indexfile, self)
            # resolve :ref:s to distant tex files -- we can't add a cross-reference,
            # but append the document name
            for pendingnode in largetree.traverse(addnodes.pending_xref):
                docname = pendingnode['refdocname']
                sectname = pendingnode['refsectname']
                newnodes = [nodes.emphasis(sectname, sectname)]
                for subdir, title in self.titles:
                    if docname.startswith(subdir):
                        newnodes.append(nodes.Text(_(' (in '), _(' (in ')))
                        newnodes.append(nodes.emphasis(title, title))
                        newnodes.append(nodes.Text(')', ')'))
                        break
                else:
                    pass
                pendingnode.replace_self(newnodes)
            return largetree

        def finish(self):
            # copy image files
            if self.images:
                self.info(bold('copying images...'), nonl=1)
                for src, dest in iteritems(self.images):
                    self.info(' '+src, nonl=1)
                    copyfile(path.join(self.srcdir, src),
                             path.join(self.outdir, dest))
                self.info()

            # copy TeX support files from texinputs
            self.info(bold('copying TeX support files...'))
            staticdirname = path.join(package_dir, 'texinputs')
            for filename in os.listdir(staticdirname):
                if not filename.startswith('.'):
                    copyfile(path.join(staticdirname, filename),
                             path.join(self.outdir, filename))

            # copy additional files
            if self.config.latex_additional_files:
                self.info(bold('copying additional files...'), nonl=1)
                for filename in self.config.latex_additional_files:
                    self.info(' '+filename, nonl=1)
                    copyfile(path.join(self.confdir, filename),
                             path.join(self.outdir, path.basename(filename)))
                self.info()

            # the logo is handled differently
            if self.config.latex_logo:
                logobase = path.basename(self.config.latex_logo)
                logotarget = path.join(self.outdir, logobase)
                if not path.isfile(path.join(self.confdir, self.config.latex_logo)):
                    raise SphinxError('logo file %r does not exist' % self.config.latex_logo)
                elif not path.isfile(logotarget):
                    copyfile(path.join(self.confdir, self.config.latex_logo), logotarget)
            self.info('done')