3b1b-manim/manimlib/utils/tex.py
Grant Sanderson 96d44bd560
Video work (#2284)
* Comment tweak

* Directly print traceback

Since the shell.showtraceback is giving some issues

* Make InteracrtiveSceneEmbed into a class

This way it can keep track of it's internal shell; use of get_ipython has a finicky relationship with reloading.

* Move remaining checkpoint_paste logic into scene_embed.py

This involved making a few context managers for Scene: temp_record, temp_skip, temp_progress_bar, which seem useful in and of themselves.

* Change null key to be the empty string

* Ensure temporary svg paths for Text are deleted

* Remove unused dict_ops.py functions

* Remove break_into_partial_movies from file_writer configuration

* Rewrite guarantee_existence using Path

* Clean up SceneFileWriter

It had a number of vestigial functions no longer used, and some setup that could be made more organized.

* Remove --save_pngs CLI arg (which did nothing)

* Add --subdivide CLI arg

* Remove add_extension_if_not_present

* Remove get_sorted_integer_files

* Have find_file return Path

* Minor clean up

* Clean up num_tex_symbols

* Fix find_file

* Minor cleanup for extract_scene.py

* Add preview_frame_while_skipping option to scene config

* Use shell.showtraceback function

* Move keybindings to config, instead of in-place constants

* Replace DEGREES -> DEG

* Add arg to clear the cache

* Separate out full_tex_to_svg from tex_to_svg

And only cache to disk the results of full_tex_to_svg.  Otherwise, making edits to the tex_templates would not show up without clearing the cache.

* Bug fix in handling BlankScene

* Make checkpoint_states an instance variable of CheckpointManager

As per https://github.com/3b1b/manim/issues/2272

* Move resizing out of Window.focus, and into Window.init_for_scene

* Make default output directory "." instead of ""

To address https://github.com/3b1b/manim/issues/2261

* Remove input_file_path arg from SceneFileWriter

* Use Dict syntax in place of dict for config more consistently across config.py

* Simplify get_output_directory

* Swap order of preamble and additional preamble

* Minor stylistic tweak

* Have UnitInterval pass on kwargs to NumberLine

* Add simple get_dist function

* Have TracedPath always update to the stroke configuration passed in

* Have Mobject.match_points apply to all parts of data in pointlike_data_key

* Always call Mobject.update upon adding an updater

* Add Surface.uv_to_point

* Make sure Surface.set_opacity takes in a recurse option

* Update num_tex_symbols to account for \{ and \}
2024-12-26 09:35:34 -08:00

41 lines
1.3 KiB
Python

from __future__ import annotations
import re
from functools import lru_cache
from manimlib.utils.tex_to_symbol_count import TEX_TO_SYMBOL_COUNT
@lru_cache
def num_tex_symbols(tex: str) -> int:
tex = remove_tex_environments(tex)
commands_pattern = r"""
(?P<sqrt>\\sqrt\[[0-9]+\])| # Special sqrt with number
(?P<escaped_brace>\\[{}])| # Escaped braces
(?P<cmd>\\[a-zA-Z!,-/:;<>]+) # Regular commands
"""
total = 0
pos = 0
for match in re.finditer(commands_pattern, tex, re.VERBOSE):
# Count normal characters up to this command
total += sum(1 for c in tex[pos:match.start()] if c not in "^{} \n\t_$\\&")
if match.group("sqrt"):
total += len(match.group()) - 5
elif match.group("escaped_brace"):
total += 1 # Count escaped brace as one symbol
else:
total += TEX_TO_SYMBOL_COUNT.get(match.group(), 1)
pos = match.end()
# Count remaining characters
total += sum(1 for c in tex[pos:] if c not in "^{} \n\t_$\\&")
return total
def remove_tex_environments(tex: str) -> str:
# Handle \phantom{...} with any content
tex = re.sub(r"\\phantom\{[^}]*\}", "", tex)
# Handle other environment commands
tex = re.sub(r"\\(begin|end)(\{\w+\})?(\{\w+\})?(\[\w+\])?", "", tex)
return tex