nbconvert: Export flavors & PDF writer (ipy dev meeting)

IPython/nbconvert/__init__.py

@@ -3,4 +3,5 @@
 from .exporters import *
 import filters
 import transformers
+import post_processors
 import writers

IPython/nbconvert/exporters/__init__.py

@@ -1,11 +1,8 @@
-from .basichtml import BasicHTMLExporter
 from .export import *
+from .html import HTMLExporter
+from .slides import SlidesExporter
 from .exporter import Exporter
-from .fullhtml import FullHTMLExporter
-from .reveal import RevealExporter
 from .latex import LatexExporter
 from .markdown import MarkdownExporter
 from .python import PythonExporter
 from .rst import RSTExporter
-from .sphinx_howto import SphinxHowtoExporter
-from .sphinx_manual import SphinxManualExporter

IPython/nbconvert/exporters/export.py

@@ -19,15 +19,12 @@
 from IPython.config import Config
 
 from .exporter import Exporter
-from .basichtml import BasicHTMLExporter
-from .fullhtml import FullHTMLExporter
+from .html import HTMLExporter
+from .slides import SlidesExporter
 from .latex import LatexExporter
 from .markdown import MarkdownExporter
 from .python import PythonExporter
-from .reveal import RevealExporter
 from .rst import RSTExporter
-from .sphinx_howto import SphinxHowtoExporter
-from .sphinx_manual import SphinxManualExporter
 
 #-----------------------------------------------------------------------------
 # Classes
@@ -54,7 +51,10 @@ def DocDecorator(f):
     exporter_instance : Exporter
         Instance of the Exporter class used to export the document.  Useful
         to caller because it provides a 'file_extension' property which
-        specifies what extension the output should be saved as."""
+        specifies what extension the output should be saved as.
+
+    WARNING: API WILL CHANGE IN FUTURE RELEASES OF NBCONVERT
+    """
 
     @wraps(f)
     def decorator(*args, **kwargs):
@@ -69,14 +69,12 @@ def decorator(*args, **kwargs):
 
 __all__ = [
     'export',
-    'export_sphinx_manual',
-    'export_sphinx_howto',
-    'export_basic_html',
-    'export_full_html',
+    'export_html',
+    'export_custom',
+    'export_slides',
     'export_latex',
     'export_markdown',
     'export_python',
-    'export_reveal',
     'export_rst',
     'export_by_name',
     'get_export_names',
@@ -126,35 +124,27 @@ def export(exporter, nb, **kw):
 
 
 @DocDecorator
-def export_sphinx_manual(nb, **kw):
-    """
-    Export a notebook object to Sphinx Manual LaTeX
-    """
-    return export(SphinxManualExporter, nb, **kw)
-
-
-@DocDecorator
-def export_sphinx_howto(nb, **kw):
+def export_custom(nb, **kw):
     """
-    Export a notebook object to Sphinx HowTo LaTeX
+    Export a notebook object to a custom format
     """
-    return export(SphinxHowtoExporter, nb, **kw)
+    return export(Exporter, nb, **kw)
 
 
 @DocDecorator
-def export_basic_html(nb, **kw):
+def export_html(nb, **kw):
     """
-    Export a notebook object to Basic HTML
+    Export a notebook object to HTML
     """
-    return export(BasicHTMLExporter, nb, **kw)
+    return export(HTMLExporter, nb, **kw)
 
 
 @DocDecorator
-def export_full_html(nb, **kw):
+def export_slides(nb, **kw):
     """
-    Export a notebook object to Full HTML
+    Export a notebook object to Slides
     """
-    return export(FullHTMLExporter, nb, **kw)
+    return export(SlidesExporter, nb, **kw)
 
 
 @DocDecorator
@@ -181,14 +171,6 @@ def export_python(nb, **kw):
     return export(PythonExporter, nb, **kw)
 
 
-@DocDecorator
-def export_reveal(nb, **kw):
-    """
-    Export a notebook object to a Reveal.js presentation
-    """
-    return export(RevealExporter, nb, **kw)
-
-
 @DocDecorator
 def export_rst(nb, **kw):
     """
@@ -217,7 +199,10 @@ def export_by_name(format_name, nb, **kw):
 
 
 def get_export_names():
-    "Return a list of the currently supported export targets"
+    """Return a list of the currently supported export targets
+
+    WARNING: API WILL CHANGE IN FUTURE RELEASES OF NBCONVERT"""
+
     # grab everything after 'export_'
     l = [x[len('export_'):] for x in __all__ if x.startswith('export_')]
 

IPython/nbconvert/exporters/exporter.py

@@ -25,7 +25,7 @@
 import datetime
 
 # other libs/dependencies
-from jinja2 import Environment, FileSystemLoader, ChoiceLoader
+from jinja2 import Environment, FileSystemLoader, ChoiceLoader, TemplateNotFound
 
 # IPython imports
 from IPython.config.configurable import Configurable
@@ -86,17 +86,23 @@ class Exporter(Configurable):
     transformers provided by default suffice, there is no need to inherit from
     this class.  Instead, override the template_file and file_extension
     traits via a config file.
-    
+
     {filters}
     """
 
     # finish the docstring
     __doc__ = __doc__.format(filters = '- '+'\n    - '.join(default_filters.keys()))
 
 
-    template_file = Unicode(
-            '', config=True,
+    template_file = Unicode(u'default',
+            config=True,
             help="Name of the template file to use")
+    def _template_file_changed(self, name, old, new):
+        if new=='default':
+            self.template_file = self.default_template
+        else:
+            self.template_file = new
+    default_template = Unicode(u'')
 
     file_extension = Unicode(
         'txt', config=True, 
@@ -155,6 +161,8 @@ def __init__(self, config=None, extra_loaders=None, **kw):
         extra_loaders : list[of Jinja Loaders]
             ordered list of Jinja loder to find templates. Will be tried in order
             before the default FileSysteme ones.
+        template : str (optional, kw arg)
+            Template to use when exporting.
         """
 
         #Call the base class constructor
@@ -165,6 +173,7 @@ def __init__(self, config=None, extra_loaders=None, **kw):
         super(Exporter, self).__init__(config=c, **kw)
 
         #Init
+        self._init_template(**kw)
         self._init_environment(extra_loaders=extra_loaders)
         self._init_transformers()
         self._init_filters()
@@ -189,12 +198,29 @@ def from_notebook_node(self, nb, resources=None, **kw):
         nb_copy = copy.deepcopy(nb)
         resources = self._init_resources(resources)
 
-        #Preprocess
+        # Preprocess
         nb_copy, resources = self._transform(nb_copy, resources)
 
-        #Convert
-        self.template = self.environment.get_template(self.template_file + self.template_extension)
-        output = self.template.render(nb=nb_copy, resources=resources)
+        # Try different template names during conversion.  First try to load the
+        # template by name with extension added, then try loading the template
+        # as if the name is explicitly specified, then try the name as a 
+        # 'flavor', and lastly just try to load the template by module name.
+        module_name = self.__module__.split('.')[-1]
+        try_names = [self.template_file + self.template_extension,
+                     self.template_file,
+                     module_name + '_' + self.template_file + self.template_extension,
+                     module_name + self.template_extension]
+        for try_name in try_names:
+            try:
+                self.template = self.environment.get_template(try_name)
+                break
+            except TemplateNotFound:
+                pass
+
+        if hasattr(self, 'template'):
+            output = self.template.render(nb=nb_copy, resources=resources)
+        else:
+            raise IOError('template file "%s" could not be found' % self.template_file)
         return output, resources
 
 
@@ -329,6 +355,16 @@ def register_filter(self, name, jinja_filter):
             raise TypeError('filter')
 
 
+    def _init_template(self, **kw):
+        """
+        Make sure a template name is specified.  If one isn't specified, try to
+        build one from the information we know.
+        """
+        self._template_file_changed('template_file', self.template_file, self.template_file)
+        if 'template' in kw:
+            self.template_file = kw['template']
+
+
     def _init_environment(self, extra_loaders=None):
         """
         Create the Jinja templating environment.

IPython/nbconvert/exporters/basichtml.py → IPython/nbconvert/exporters/html.py

@@ -17,14 +17,15 @@
 from IPython.utils.traitlets import Unicode, List
 
 from IPython.nbconvert import transformers
+from IPython.config import Config
 
 from .exporter import Exporter
 
 #-----------------------------------------------------------------------------
 # Classes
 #-----------------------------------------------------------------------------
 
-class BasicHTMLExporter(Exporter):
+class HTMLExporter(Exporter):
     """
     Exports a basic HTML document.  This exporter assists with the export of
     HTML.  Inherit from it if you are writing your own HTML template and need
@@ -37,6 +38,15 @@ class BasicHTMLExporter(Exporter):
         help="Extension of the file that should be written to disk"
         )
 
-    template_file = Unicode(
-            'basichtml', config=True,
-            help="Name of the template file to use")
+    default_template = Unicode('full', config=True, help="""Flavor of the data 
+        format to use.  I.E. 'full' or 'basic'""")
+
+    @property
+    def default_config(self):
+        c = Config({
+            'CSSHTMLHeaderTransformer':{
+                'enabled':True
+                }          
+            })
+        c.merge(super(HTMLExporter,self).default_config)
+        return c

IPython/nbconvert/exporters/latex.py

@@ -44,9 +44,8 @@ class LatexExporter(Exporter):
         'tex', config=True, 
         help="Extension of the file that should be written to disk")
 
-    template_file = Unicode(
-        'base', config=True,
-        help="Name of the template file to use")
+    default_template = Unicode('article', config=True, help="""Template of the 
+        data format to use.  I.E. 'full' or 'basic'""")
 
     #Latex constants
     default_template_path = Unicode(
@@ -68,6 +67,7 @@ class LatexExporter(Exporter):
     #Extension that the template files use.    
     template_extension = Unicode(".tplx", config=True)
 
+
     @property
     def default_config(self):
         c = Config({
@@ -82,6 +82,9 @@ def default_config(self):
                  },
              'LatexTransformer': {
                     'enabled':True
+                 },
+             'SphinxTransformer': {
+                    'enabled':True
                  }
          })
         c.merge(super(LatexExporter,self).default_config)

IPython/nbconvert/exporters/markdown.py

@@ -29,7 +29,3 @@ class MarkdownExporter(Exporter):
     file_extension = Unicode(
         'md', config=True, 
         help="Extension of the file that should be written to disk")
-
-    template_file = Unicode(
-            'markdown', config=True,
-            help="Name of the template file to use")

IPython/nbconvert/exporters/python.py

@@ -29,7 +29,3 @@ class PythonExporter(Exporter):
     file_extension = Unicode(
         'py', config=True, 
         help="Extension of the file that should be written to disk")
-
-    template_file = Unicode(
-            'python', config=True,
-            help="Name of the template file to use")

IPython/nbconvert/exporters/rst.py

@@ -31,10 +31,6 @@ class RSTExporter(Exporter):
         'rst', config=True, 
         help="Extension of the file that should be written to disk")
 
-    template_file = Unicode(
-            'rst', config=True,
-            help="Name of the template file to use")
-
     @property
     def default_config(self):
         c = Config({'ExtractOutputTransformer':{'enabled':True}})