[wip] pdf generation

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}

.binstar.yml

@@ -9,6 +9,6 @@ engine:
   - python=3.5
 
 script:
-  - conda build -c javascript conda.recipe
+  - conda build conda.recipe -c javascript -c nbcio
 
 build_targets: conda

bin/browserify-notebook.sh

@@ -12,7 +12,7 @@ browserify \
   --external d3 \
   --external html2canvas \
   --external baobab \
-  --external node-uuid \
+  --external uuid \
   --external nbpresent-deps \
   --transform [ babelify --sourceMapRelative . ] \
   ${EXTRA} \

conda.recipe/meta.yaml

@@ -14,18 +14,13 @@ requirements:
   build:
     - nodejs
     - python
-    - notebook
-    - jupyter
-    - funcsigs
   run:
     - python
     - notebook
-    - jupyter
     - funcsigs
 
 test:
   imports:
-    - notebook
     - nbpresent
 
 about:

environment.yml

@@ -1,28 +1,79 @@
-name: nbindex
+name: nbpresent
 dependencies:
-- anaconda-client=1.0.2=py35_0
-- clyent=0.4.0=py35_0
-- freetype=2.5.2=2
+- anaconda-client=1.1.2=py35_0
+- bokeh=0.10.0=py35_0
+- clyent=1.0.0=py35_0
+- cycler=0.9.0=py35_0
+- decorator=4.0.4=py35_0
+- flask=0.10.1=py35_1
+- fontconfig=2.11.1=5
+- freetype=2.5.5=0
+- ipykernel=4.1.1=py35_0
+- ipython=4.0.0=py35_0
+- ipython_genutils=0.1.0=py35_0
+- ipywidgets=4.1.0=py35_0
+- itsdangerous=0.24=py35_0
+- jbig=2.1=0
+- jinja2=2.8=py35_0
 - jpeg=8d=0
+- jsonschema=2.4.0=py35_0
+- jupyter_client=4.1.1=py35_0
+- jupyter_core=4.0.6=py35_0
+- libgfortran=1.0=0
 - libpng=1.6.17=0
-- libtiff=4.0.2=1
-- openssl=1.0.1k=1
-- pillow=2.9.0=py35_0
+- libsodium=1.0.3=0
+- libtiff=4.0.6=1
+- libxml2=2.9.2=0
+- markupsafe=0.23=py35_0
+- matplotlib=1.5.0=np110py35_0
+- mistune=0.7.1=py35_0
+- nbconvert=4.0.0=py35_0
+- nbformat=4.0.1=py35_0
+- nodejs=4.2.0=1
+- notebook=4.0.6=py35_0
+- numpy=1.10.1=py35_0
+- openblas=0.2.14=3
+- openssl=1.0.2d=0
+- pandas=0.17.0=np110py35_0
+- path.py=8.1.2=py35_0
+- pexpect=3.3=py35_0
+- pickleshare=0.5=py35_0
+- pillow=3.0.0=py35_1
 - pip=7.1.2=py35_0
-- python=3.5.0=0
+- ptyprocess=0.5=py35_0
+- pygments=2.0.2=py35_0
+- pyparsing=2.0.3=py35_0
+- pyqt=4.11.4=py35_0
+- python=3.5.0=1
 - python-dateutil=2.4.2=py35_0
-- pytz=2015.6=py35_0
+- pytz=2015.7=py35_0
 - pyyaml=3.11=py35_1
+- pyzmq=14.7.0=py35_1
+- qt=4.8.7=1
 - readline=6.2=2
-- requests=2.7.0=py35_0
-- setuptools=18.1=py35_0
-- six=1.9.0=py35_0
+- requests=2.8.1=py35_0
+- setuptools=18.4=py35_0
+- simplegeneric=0.8.1=py35_0
+- sip=4.16.9=py35_0
+- six=1.10.0=py35_0
 - sqlite=3.8.4.1=1
+- terminado=0.5=py35_1
 - tk=8.5.18=0
-- wheel=0.26.0=py35_0
+- tornado=4.2.1=py35_1
+- traitlets=4.0.0=py35_0
+- werkzeug=0.11.2=py35_0
+- wheel=0.26.0=py35_1
 - xz=5.0.5=0
 - yaml=0.1.6=0
+- zeromq=4.1.3=0
 - zlib=1.2.8=0
 - pip:
-  - elasticsearch==1.7.0
-  - urllib3==1.12
+  - bqplot==0.4.2
+  - ghost.py==0.2.3
+  - ipython-genutils==0.1.0
+  - jupyter-client==4.1.1
+  - jupyter-core==4.0.6
+  - nbpresent (/home/weg/Documents/projects/nbpresent)==0.3.0.dev0
+  - pypdf2==1.25.1
+  - qgrid==0.2.0
+

nbpresent/__init__.py

@@ -4,5 +4,23 @@
 
 def load_jupyter_server_extension(nbapp):
     from nbconvert.exporters.export import exporter_map
-    from .exporter import PresentExporter
-    exporter_map["nbpresent"] = PresentExporter
+    from .exporters.html import PresentExporter
+
+    nbapp.log.info("Enabling nbpresent HTML export")
+    exporter_map.update(
+        nbpresent=PresentExporter,
+    )
+
+    try:
+        from .exporters.pdf import PDFPresentExporter
+    except Exception as err:
+        nbapp.log.warn(
+            "nbbrowserpdf not available, PDF generation disabled: {}"
+            .format(err)
+        )
+        return
+
+    nbapp.log.info("Enabling nbpresent PDF export")
+    exporter_map.update(
+        nbpresent_pdf=PDFPresentExporter
+    )

nbpresent/exporters/__init__.py

@@ -0,0 +1,5 @@
+# flake8: noqa
+from .base import (
+    ASSETS,
+    APP_ROOT
+)

nbpresent/exporters/base.py

@@ -0,0 +1,10 @@
+import os
+
+from notebook import DEFAULT_STATIC_FILES_PATH
+
+APP_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
+ASSETS = os.path.join(APP_ROOT, "static", "nbpresent")
+NB_ASSETS = [os.path.join(DEFAULT_STATIC_FILES_PATH, *bits) for bits in [
+    ["components", "requirejs", "require.js"],
+    ["components", "jquery", "jquery.min.js"]
+]]

nbpresent/exporter.py → nbpresent/exporters/html.py

@@ -4,8 +4,11 @@
 
 from nbconvert.exporters.html import HTMLExporter
 
-APP_ROOT = os.path.abspath(os.path.dirname(__file__))
-ASSETS = os.path.join(APP_ROOT, "static", "nbpresent")
+from .base import (
+    APP_ROOT,
+    ASSETS,
+    NB_ASSETS
+)
 
 
 class PresentExporter(HTMLExporter):
@@ -18,6 +21,8 @@ def __init__(self, *args, **kwargs):
         super(PresentExporter, self).__init__(*args, **kwargs)
 
     def from_notebook_node(self, nb, resources=None, **kw):
+        bin_ext = ["woff", "ttf"]
+
         resources = self._init_resources(resources)
         resources.update(
             nbpresent={
@@ -26,8 +31,12 @@ def from_notebook_node(self, nb, resources=None, **kw):
                                        sort_keys=True)
             },
             outputs={
-                filename: open(filename).read()
-                for filename in glob(os.path.join(ASSETS, "*.*"))
+                filename: open(
+                    filename,
+                    "rb" if filename.split(".")[-1] in bin_ext else "r"
+                ).read()
+                for filename
+                in list(glob(os.path.join(ASSETS, "*.*"))) + NB_ASSETS
             }
         )
 

nbpresent/exporters/pdf.py

@@ -0,0 +1,11 @@
+from .html import PresentExporter
+
+from nbbrowserpdf.exporters.pdf import BrowserPDFExporter
+
+
+class PDFPresentExporter(PresentExporter, BrowserPDFExporter):
+    def pdf_capture_args(self):
+        return [
+            "--capture-server-class",
+            "nbpresent.exporters.pdf_capture:SlideCaptureServer"
+        ]

nbpresent/exporters/pdf_capture.py

@@ -0,0 +1,83 @@
+import time
+
+from ghost.bindings import (
+    QPainter,
+    QPrinter,
+    QtCore,
+)
+
+from PyPDF2 import (
+    PdfFileReader,
+    PdfFileMerger,
+)
+
+from nbbrowserpdf.exporters.pdf_capture import CaptureServer
+
+VIEWPORT = (1920, 1080)
+
+
+class SlideCaptureServer(CaptureServer):
+    """ CaptureServer to generate multi-page PDF based on nbpresent metadata
+    """
+    def init_session(self):
+        """ create a session with a some tweaked settings
+        """
+        return self.ghost.start(
+            # display=True,
+            # TODO: read this off config
+            viewport_size=VIEWPORT,
+            show_scrollbars=False,
+        )
+
+    def page_ready(self):
+        """ Wait until nbpresent-css gets created
+        """
+        self.session.wait_for_page_loaded()
+        self.session.wait_for_selector("#nbpresent-css")
+        time.sleep(1)
+
+    def print_to_pdf(self, path):
+        """ Custom print based on metadata: generate one per slide
+        """
+        merger = PdfFileMerger()
+
+        for i, slide in enumerate(self.notebook.metadata.nbpresent.slides):
+            print("\n\n\nprinting slide", i, slide)
+            # science help you if you have 9999 slides
+            filename = self.in_static("notebook-{0:04d}.pdf".format(i))
+            # this is weird, but it seems to always need it
+            self.session.show()
+            self.screenshot(filename)
+            merger.append(PdfFileReader(filename, "rb"))
+
+            # advance the slides
+            result, resources = self.session.evaluate(
+                """
+                console.log(window.nbpresent);
+                console.log(window.nbpresent.mode.presenter.speaker.advance());
+                """)
+
+            # always seem to get some weirdness... perhaps could inttegrate
+            # ioloop...
+            time.sleep(1)
+
+        # all done!
+        merger.write(path)
+
+    def screenshot(self, filename):
+        """ do an individual slide screenshot
+            big thanks to https://gist.github.com/jmaupetit/4217925
+        """
+
+        printer = QPrinter(mode=QPrinter.ScreenResolution)
+        printer.setOutputFormat(QPrinter.PdfFormat)
+        printer.setPaperSize(QtCore.QSizeF(*reversed(VIEWPORT)),
+                             QPrinter.DevicePixel)
+        printer.setOrientation(QPrinter.Landscape)
+        printer.setOutputFileName(filename)
+        printer.setPageMargins(0, 0, 0, 0, QPrinter.DevicePixel)
+
+        painter = QPainter(printer)
+        painter.scale(1.45, 1.45)
+        self.session.main_frame.render(painter)
+        painter.end()