feat(lib): add support for presenter notes (#322)

* feat(lib): add support for presenter notes

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* fix(test): typo

* Update test_slide.py

* Update convert.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -21,6 +21,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added the `playback-rate` and `reversed-playback-rate` options
   to slide config.
   [#320](https://github.com/jeertmans/manim-slides/pull/320)
+- Added the speaker notes option.
+  [#322](https://github.com/jeertmans/manim-slides/pull/322)
 
 (v5.1-modified)=
 ### Modified

manim_slides/config.py

@@ -144,6 +144,7 @@ class BaseSlideConfig(BaseModel):  # type: ignore
     auto_next: bool = False
     playback_rate: float = 1.0
     reversed_playback_rate: float = 1.0
+    notes: str = ""
 
     @classmethod
     def wrapper(cls, arg_name: str) -> Callable[..., Any]:

manim_slides/convert.py

@@ -406,9 +406,16 @@ def convert_to(self, dest: Path) -> None:
             options = self.dict()
             options["assets_dir"] = assets_dir
 
+            has_notes = any(
+                slide_config.notes != ""
+                for presentation_config in self.presentation_configs
+                for slide_config in presentation_config.slides
+            )
+
             content = revealjs_template.render(
                 file_to_data_uri=file_to_data_uri,
                 get_duration_ms=get_duration_ms,
+                has_notes=has_notes,
                 **options,
             )
 

manim_slides/present/player.py

@@ -5,7 +5,7 @@
 from PySide6.QtGui import QCloseEvent, QIcon, QKeyEvent, QScreen
 from PySide6.QtMultimedia import QMediaPlayer
 from PySide6.QtMultimediaWidgets import QVideoWidget
-from PySide6.QtWidgets import QDialog, QGridLayout, QLabel, QMainWindow
+from PySide6.QtWidgets import QDialog, QGridLayout, QLabel, QMainWindow, QVBoxLayout
 
 from ..config import Config, PresentationConfig, SlideConfig
 from ..logger import logger
@@ -18,17 +18,25 @@ class Info(QDialog):  # type: ignore[misc]
     def __init__(self, *args: Any, **kwargs: Any) -> None:
         super().__init__(*args, **kwargs)
 
-        layout = QGridLayout()
+        main_layout = QVBoxLayout()
+        labels_layout = QGridLayout()
+        notes_layout = QVBoxLayout()
         self.scene_label = QLabel()
         self.slide_label = QLabel()
+        self.slide_notes = QLabel("")
+        self.slide_notes.setWordWrap(True)
 
-        layout.addWidget(QLabel("Scene:"), 1, 1)
-        layout.addWidget(QLabel("Slide:"), 2, 1)
-        layout.addWidget(self.scene_label, 1, 2)
-        layout.addWidget(self.slide_label, 2, 2)
-        self.setLayout(layout)
-        self.setFixedWidth(150)
-        self.setFixedHeight(80)
+        labels_layout.addWidget(QLabel("Scene:"), 1, 1)
+        labels_layout.addWidget(QLabel("Slide:"), 2, 1)
+        labels_layout.addWidget(self.scene_label, 1, 2)
+        labels_layout.addWidget(self.slide_label, 2, 2)
+
+        notes_layout.addWidget(self.slide_notes)
+
+        main_layout.addLayout(labels_layout)
+        main_layout.addLayout(notes_layout)
+
+        self.setLayout(main_layout)
 
         if parent := self.parent():
             self.closeEvent = parent.closeEvent
@@ -312,6 +320,7 @@ def slide_changed_callback(self) -> None:
         index = self.current_slide_index
         count = self.current_slides_count
         self.info.slide_label.setText(f"{index+1:4d}/{count:4<d}")
+        self.info.slide_notes.setText(self.current_slide_config.notes)
 
     def show(self) -> None:
         super().show()

manim_slides/slide/base.py

@@ -288,6 +288,11 @@ def next_slide(
             Playback rate at which the reversed video is played.
 
             Note that this is only supported by ``manim-slides present``.
+        :param notes:
+            Presenter notes, in HTML format.
+
+            Note that this is only supported by ``manim-slides present``
+            and ``manim-slides convert --to=html``.
         :param kwargs:
             Keyword arguments to be passed to
             :meth:`Scene.next_section<manim.scene.scene.Scene.next_section>`,
@@ -372,6 +377,29 @@ def construct(self):
                     self.next_slide()
 
                     self.wipe(square)
+
+        The following contains speaker notes. On the webbrowser,
+        the speaker view can be triggered by pressing :kbd:`S`.
+
+        .. manim-slides:: SpeakerNotesExample
+
+            from manim import *
+            from manim_slides import Slide
+
+            class SpeakerNotesExample(Slide):
+                def construct(self):
+                    self.next_slide(notes="Some introduction")
+                    square = Square(color=GREEN, side_length=2)
+
+                    self.play(GrowFromCenter(square))
+
+                    self.next_slide(notes="We now rotate the slide")
+
+                    self.play(Rotate(square, PI / 2))
+
+                    self.next_slide(notes="Bye bye")
+
+                    self.zoom(square)
         """
         if self._current_animation > self._start_animation:
             if self.wait_time_between_slides > 0.0:

manim_slides/templates/revealjs.html

@@ -40,6 +40,9 @@
               {% if slide_config.auto_next -%}
                 data-autoslide="{{ get_duration_ms(slide_config.file) }}"
               {%- endif -%}>
+              {% if slide_config.notes != "" -%}
+                <aside class="notes">{{ slide_config.notes }}</aside>
+              {%- endif %}
             </section>
           {%- endfor -%}
         {%- endfor -%}
@@ -50,9 +53,16 @@
 
     <!-- To include plugins, see: https://revealjs.com/plugins/ -->
 
+    {% if has_notes -%}
+      <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/{{ reveal_version }}/plugin/notes/notes.min.js"></script>
+    {%- endif -%}
+
     <!-- <script src="index.js"></script> -->
     <script>
       Reveal.initialize({
+        {% if has_notes -%}
+          plugins: [ RevealNotes ],
+        {%- endif %}
         // The "normal" size of the presentation, aspect ratio will
         // be preserved when the presentation is scaled to fit different
         // resolutions. Can be specified using percentage units.

tests/test_slide.py

@@ -196,6 +196,34 @@ def construct(self) -> None:
 
             assert self._base_slide_config.playback_rate == 2.0
 
+    @assert_constructs
+    class TestReversedPlaybackRate(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+
+            self.add(text)
+
+            assert self._base_slide_config.reversed_playback_rate == 1.0
+
+            self.next_slide(reversed_playback_rate=2.0)
+            self.play(text.animate.scale(2))
+
+            assert self._base_slide_config.reversed_playback_rate == 2.0
+
+    @assert_constructs
+    class TestNotes(Slide):
+        def construct(self) -> None:
+            text = Text("Some text")
+
+            self.add(text)
+
+            assert self._base_slide_config.notes == ""
+
+            self.next_slide(notes="test")
+            self.play(text.animate.scale(2))
+
+            assert self._base_slide_config.notes == "test"
+
     @assert_constructs
     class TestWipe(Slide):
         def construct(self) -> None: