Construct TexTemplate class to convert tex to svg

manimlib/constants.py

@@ -64,6 +64,56 @@ JOINT_TYPE_MAP = {
     "miter": 3,
 }
 
+# Related to Tex
+PRESET_PREAMBLE = {
+    "default": (
+        "\\usepackage[english]{babel}",
+        "\\usepackage[utf8]{inputenc}",
+        "\\usepackage[T1]{fontenc}",
+        "\\usepackage{amsmath}",
+        "\\usepackage{amssymb}",
+        "\\usepackage{dsfont}",
+        "\\usepackage{setspace}",
+        "\\usepackage{tipa}",
+        "\\usepackage{relsize}",
+        "\\usepackage{textcomp}",
+        "\\usepackage{mathrsfs}",
+        "\\usepackage{calligra}",
+        "\\usepackage{wasysym}",
+        "\\usepackage{ragged2e}",
+        "\\usepackage{physics}",
+        "\\usepackage{xcolor}",
+        "\\usepackage{microtype}",
+        "\\usepackage{pifont}",
+        "\\DisableLigatures{encoding = *, family = * }",
+        "\\linespread{1}",
+    ),
+    "ctex": (
+        "\\usepackage[UTF8]{ctex}",
+        "\\usepackage[english]{babel}",
+        "\\usepackage{amsmath}",
+        "\\usepackage{amssymb}",
+        "\\usepackage{dsfont}",
+        "\\usepackage{setspace}",
+        "\\usepackage{tipa}",
+        "\\usepackage{relsize}",
+        "\\usepackage{textcomp}",
+        "\\usepackage{mathrsfs}",
+        "\\usepackage{calligra}",
+        "\\usepackage{wasysym}",
+        "\\usepackage{ragged2e}",
+        "\\usepackage{physics}",
+        "\\usepackage{xcolor}",
+        "\\usepackage{microtype}",
+        "\\linespread{1}",
+    ),
+    "minimized": (
+        "\\usepackage{amsmath}",
+        "\\usepackage{amssymb}",
+        "\\usepackage{xcolor}",
+    ),
+}
+
 # Related to Text
 NORMAL = "NORMAL"
 ITALIC = "ITALIC"

manimlib/default_config.yml

@@ -18,13 +18,12 @@ directories:
   temporary_storage: ""
 tex:
   executable: "latex"
-  template_file: "tex_template.tex" 
+  intermediate_filetype: ".dvi"
-  intermediate_filetype: "dvi"
+  preamble: "default"
-  text_to_replace: "[tex_expression]"
   # For ctex, use the following configuration
   # executable: "xelatex -no-pdf"
-  # template_file: "ctex_template.tex"
+  # intermediate_filetype: ".xdv"
-  # intermediate_filetype: "xdv"
+  # preamble: "ctex"
 universal_import_line: "from manimlib import *"
 style:
   font: "Consolas"

manimlib/mobject/svg/mtex_mobject.py

@@ -1,9 +1,7 @@
 from __future__ import annotations
 
 from manimlib.mobject.svg.string_mobject import StringMobject
-from manimlib.utils.tex_file_writing import display_during_execution
+from manimlib.utils.tex_file_writing import TexTemplate
-from manimlib.utils.tex_file_writing import get_tex_config
-from manimlib.utils.tex_file_writing import tex_to_svg_file
 
 from typing import TYPE_CHECKING
 
@@ -37,6 +35,7 @@ class MTex(StringMobject):
         "alignment": "\\centering",
         "tex_environment": "align*",
         "tex_to_color_map": {},
+        "tex_template": None,
     }
 
     def __init__(self, tex_string: str, **kwargs):
@@ -60,17 +59,13 @@ class MTex(StringMobject):
             self.tex_string,
             self.alignment,
             self.tex_environment,
-            self.tex_to_color_map
+            self.tex_to_color_map,
+            self.tex_template
         )
 
     def get_file_path_by_content(self, content: str) -> str:
-        tex_config = get_tex_config()
+        tex_template = self.tex_template or TexTemplate()
-        full_tex = tex_config["tex_body"].replace(
+        file_path = tex_template.get_svg_file_path(content)
-            tex_config["text_to_replace"],
-            content
-        )
-        with display_during_execution(f"Writing \"{self.string}\""):
-            file_path = tex_to_svg_file(full_tex)
         return file_path
 
     # Parsing

manimlib/mobject/svg/tex_mobject.py

@@ -12,9 +12,7 @@ from manimlib.mobject.geometry import Line
 from manimlib.mobject.svg.svg_mobject import SVGMobject
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.utils.config_ops import digest_config
-from manimlib.utils.tex_file_writing import display_during_execution
+from manimlib.utils.tex_file_writing import TexTemplate
-from manimlib.utils.tex_file_writing import get_tex_config
-from manimlib.utils.tex_file_writing import tex_to_svg_file
 
 from typing import TYPE_CHECKING
 
@@ -44,6 +42,7 @@ class SingleStringTex(SVGMobject):
         "alignment": "\\centering",
         "math_mode": True,
         "organize_left_to_right": False,
+        "tex_template": None,
     }
 
     def __init__(self, tex_string: str, **kwargs):
@@ -64,27 +63,21 @@ class SingleStringTex(SVGMobject):
             self.path_string_config,
             self.tex_string,
             self.alignment,
-            self.math_mode
+            self.math_mode,
+            self.tex_template
         )
 
     def get_file_path(self) -> str:
-        full_tex = self.get_tex_file_body(self.tex_string)
+        content = self.get_tex_file_body(self.tex_string)
-        with display_during_execution(f"Writing \"{self.tex_string}\""):
+        tex_template = self.tex_template or TexTemplate()
-            file_path = tex_to_svg_file(full_tex)
+        file_path = tex_template.get_svg_file_path(content)
         return file_path
 
     def get_tex_file_body(self, tex_string: str) -> str:
         new_tex = self.get_modified_expression(tex_string)
         if self.math_mode:
             new_tex = "\\begin{align*}\n" + new_tex + "\n\\end{align*}"
-
+        return self.alignment + "\n" + new_tex
-        new_tex = self.alignment + "\n" + new_tex
-
-        tex_config = get_tex_config()
-        return tex_config["tex_body"].replace(
-            tex_config["text_to_replace"],
-            new_tex
-        )
 
     def get_modified_expression(self, tex_string: str) -> str:
         return self.modify_special_strings(tex_string.strip())

manimlib/mobject/svg/text_mobject.py

@@ -18,7 +18,7 @@ from manimlib.utils.config_ops import digest_config
 from manimlib.utils.customization import get_customization
 from manimlib.utils.directories import get_downloads_dir
 from manimlib.utils.directories import get_text_dir
-from manimlib.utils.tex_file_writing import tex_hash
+from manimlib.utils.simple_functions import hash_string
 
 from typing import TYPE_CHECKING
 
@@ -180,7 +180,7 @@ class MarkupText(StringMobject):
             self.line_width
         ))
         svg_file = os.path.join(
-            get_text_dir(), tex_hash(hash_content) + ".svg"
+            get_text_dir(), hash_string(hash_content) + ".svg"
         )
         if not os.path.exists(svg_file):
             self.markup_to_svg(content, svg_file)

manimlib/tex_templates/ctex_template.tex

@@ -1,25 +0,0 @@
-\documentclass[preview]{standalone}
-\usepackage[UTF8]{ctex}
-
-\usepackage[english]{babel}
-\usepackage{amsmath}
-\usepackage{amssymb}
-\usepackage{dsfont}
-\usepackage{setspace}
-\usepackage{tipa}
-\usepackage{relsize}
-\usepackage{textcomp}
-\usepackage{mathrsfs}
-\usepackage{calligra}
-\usepackage{wasysym}
-\usepackage{ragged2e}
-\usepackage{physics}
-\usepackage{xcolor}
-\usepackage{microtype}
-\linespread{1}
-
-\begin{document}
-
-[tex_expression]
-
-\end{document}

manimlib/tex_templates/tex_template.tex

@@ -1,28 +0,0 @@
-\documentclass[preview]{standalone}
-
-\usepackage[english]{babel}
-\usepackage[utf8]{inputenc}
-\usepackage[T1]{fontenc}
-\usepackage{amsmath}
-\usepackage{amssymb}
-\usepackage{dsfont}
-\usepackage{setspace}
-\usepackage{tipa}
-\usepackage{relsize}
-\usepackage{textcomp}
-\usepackage{mathrsfs}
-\usepackage{calligra}
-\usepackage{wasysym}
-\usepackage{ragged2e}
-\usepackage{physics}
-\usepackage{xcolor}
-\usepackage{microtype}
-\usepackage{pifont}
-\DisableLigatures{encoding = *, family = * }
-\linespread{1}
-
-\begin{document}
-
-[tex_expression]
-
-\end{document}

manimlib/utils/init_config.py

@@ -44,9 +44,8 @@ def init_customization() -> None:
         },
         "tex": {
             "executable": "",
-            "template_file": "",
             "intermediate_filetype": "",
-            "text_to_replace": "[tex_expression]",
+            "preamble": "",
         },
         "universal_import_line": "from manimlib import *",
         "style": {
@@ -129,12 +128,12 @@ def init_customization() -> None:
         )
         if tex == "latex":
             tex_config["executable"] = "latex"
-            tex_config["template_file"] = "tex_template.tex"
+            tex_config["intermediate_filetype"] = ".dvi"
-            tex_config["intermediate_filetype"] = "dvi"
+            tex_config["preamble"] = "default"
         else:
             tex_config["executable"] = "xelatex -no-pdf"
-            tex_config["template_file"] = "ctex_template.tex"
+            tex_config["intermediate_filetype"] = ".xdv"
-            tex_config["intermediate_filetype"] = "xdv"
+            tex_config["preamble"] = "ctex"
 
         console.print("[bold]Styles:[/bold]")
         configuration["style"]["background_color"] = Prompt.ask(

manimlib/utils/simple_functions.py

@@ -1,4 +1,5 @@
 from functools import lru_cache
+import hashlib
 import inspect
 import math
 
@@ -76,3 +77,9 @@ def binary_search(function,
         else:
             return None
     return mh
+
+
+def hash_string(string):
+    # Truncating at 16 bytes for cleanliness
+    hasher = hashlib.sha256(string.encode())
+    return hasher.hexdigest()[:16]

manimlib/utils/tex_file_writing.py

@@ -1,143 +1,102 @@
 from __future__ import annotations
 
-from contextlib import contextmanager
-import hashlib
 import os
-import sys
+import re
 
 from manimlib.config import get_custom_config
-from manimlib.config import get_manim_dir
+from manimlib.constants import PRESET_PREAMBLE
 from manimlib.logger import log
 from manimlib.utils.directories import get_tex_dir
-
+from manimlib.utils.simple_functions import hash_string
-
-SAVED_TEX_CONFIG = {}
-
-
-def get_tex_config() -> dict[str, str]:
-    """
-    Returns a dict which should look something like this:
-    {
-        "executable": "latex",
-        "template_file": "tex_template.tex",
-        "intermediate_filetype": "dvi",
-        "text_to_replace": "YourTextHere",
-        "tex_body": "..."
-    }
-    """
-    # Only load once, then save thereafter
-    if not SAVED_TEX_CONFIG:
-        custom_config = get_custom_config()
-        SAVED_TEX_CONFIG.update(custom_config["tex"])
-        # Read in template file
-        template_filename = os.path.join(
-            get_manim_dir(), "manimlib", "tex_templates",
-            SAVED_TEX_CONFIG["template_file"],
-        )
-        with open(template_filename, "r", encoding="utf-8") as file:
-            SAVED_TEX_CONFIG["tex_body"] = file.read()
-    return SAVED_TEX_CONFIG
-
-
-def tex_hash(tex_file_content: str) -> int:
-    # Truncating at 16 bytes for cleanliness
-    hasher = hashlib.sha256(tex_file_content.encode())
-    return hasher.hexdigest()[:16]
-
-
-def tex_to_svg_file(tex_file_content: str) -> str:
-    svg_file = os.path.join(
-        get_tex_dir(), tex_hash(tex_file_content) + ".svg"
-    )
-    if not os.path.exists(svg_file):
-        # If svg doesn't exist, create it
-        tex_to_svg(tex_file_content, svg_file)
-    return svg_file
-
-
-def tex_to_svg(tex_file_content: str, svg_file: str) -> str:
-    tex_file = svg_file.replace(".svg", ".tex")
-    with open(tex_file, "w", encoding="utf-8") as outfile:
-        outfile.write(tex_file_content)
-    svg_file = dvi_to_svg(tex_to_dvi(tex_file))
-
-    # Cleanup superfluous documents
-    tex_dir, name = os.path.split(svg_file)
-    stem, end = name.split(".")
-    for file in filter(lambda s: s.startswith(stem), os.listdir(tex_dir)):
-        if not file.endswith(end):
-            os.remove(os.path.join(tex_dir, file))
-
-    return svg_file
-
-
-def tex_to_dvi(tex_file: str) -> str:
-    tex_config = get_tex_config()
-    program = tex_config["executable"]
-    file_type = tex_config["intermediate_filetype"]
-    result = tex_file.replace(".tex", "." + file_type)
-    if not os.path.exists(result):
-        commands = [
-            program,
-            "-interaction=batchmode",
-            "-halt-on-error",
-            f"-output-directory=\"{os.path.dirname(tex_file)}\"",
-            f"\"{tex_file}\"",
-            ">",
-            os.devnull
-        ]
-        exit_code = os.system(" ".join(commands))
-        if exit_code != 0:
-            log_file = tex_file.replace(".tex", ".log")
-            log.error("LaTeX Error!  Not a worry, it happens to the best of us.")
-            with open(log_file, "r", encoding="utf-8") as file:
-                for line in file.readlines():
-                    if line.startswith("!"):
-                        log.debug(f"The error could be: `{line[2:-1]}`")
-            raise LatexError()
-    return result
-
-
-def dvi_to_svg(dvi_file: str) -> str:
-    """
-    Converts a dvi, which potentially has multiple slides, into a
-    directory full of enumerated pngs corresponding with these slides.
-    Returns a list of PIL Image objects for these images sorted as they
-    where in the dvi
-    """
-    file_type = get_tex_config()["intermediate_filetype"]
-    result = dvi_file.replace("." + file_type, ".svg")
-    if not os.path.exists(result):
-        commands = [
-            "dvisvgm",
-            "\"{}\"".format(dvi_file),
-            "-n",
-            "-v",
-            "0",
-            "-o",
-            "\"{}\"".format(result),
-            ">",
-            os.devnull
-        ]
-        os.system(" ".join(commands))
-    return result
-
-
-# TODO, perhaps this should live elsewhere
-@contextmanager
-def display_during_execution(message: str) -> None:
-    # Only show top line
-    to_print = message.split("\n")[0]
-    max_characters = os.get_terminal_size().columns - 1
-    if len(to_print) > max_characters:
-        to_print = to_print[:max_characters - 3] + "..."
-    try:
-        print(to_print, end="\r")
-        yield
-    finally:
-        print(" " * len(to_print), end="\r")
-
 
 
 class LatexError(Exception):
     pass
+
+
+class TexTemplate:
+    def __init__(self, preamble_type: str | None = None):
+        tex_config = get_custom_config()["tex"]
+        self.executable = tex_config["executable"]
+        self.dvi_ext = tex_config["intermediate_filetype"]
+        if preamble_type is None:
+            preamble_type = tex_config["preamble"]
+        self.preamble = list(PRESET_PREAMBLE.get(
+            preamble_type, PRESET_PREAMBLE["default"]
+        ))
+
+    def __hash__(self) -> int:
+        return hash(self.get_tex_file_content(""))
+
+    def get_tex_file_content(self, content: str) -> str:
+        return "\n\n".join((
+            "\\documentclass[preview]{standalone}",
+            "\n".join(self.preamble),
+            "\\begin{document}",
+            content,
+            "\\end{document}"
+        )) + "\n"
+
+    def get_svg_file_path(self, content: str) -> str:
+        full_tex = self.get_tex_file_content(content)
+        hash_code = hash_string(full_tex)
+        tex_dir = get_tex_dir()
+        root = os.path.join(tex_dir, hash_code)
+        svg_file_path = root + ".svg"
+        if os.path.exists(svg_file_path):
+            return svg_file_path
+
+        # If svg doesn't exist, create it
+        replaced_content = content.replace("\n", " ")
+        displayed_msg = f"Writing \"{replaced_content}\""
+        max_characters = os.get_terminal_size().columns - 1
+        if len(displayed_msg) > max_characters:
+            displayed_msg = displayed_msg[:max_characters - 3] + "..."
+        print(displayed_msg, end="\r")
+
+        with open(root + ".tex", "w", encoding="utf-8") as tex_file:
+            tex_file.write(full_tex)
+
+        # tex to dvi
+        if os.system(" ".join((
+            self.executable,
+            "-interaction=batchmode",
+            "-halt-on-error",
+            f"-output-directory=\"{tex_dir}\"",
+            f"\"{root}.tex\"",
+            ">",
+            os.devnull
+        ))):
+            log.error("LaTeX Error!  Not a worry, it happens to the best of us.")
+            with open(root + ".log", "r", encoding="utf-8") as log_file:
+                error_match_obj = re.search(r"(?<=\n! ).*", log_file.read())
+                if error_match_obj:
+                    log.debug("The error could be: `%s`", error_match_obj.group())
+            raise LatexError()
+
+        # dvi to svg
+        os.system(" ".join((
+            "dvisvgm",
+            f"\"{root}{self.dvi_ext}\"",
+            "-n",
+            "-v",
+            "0",
+            "-o",
+            f"\"{svg_file_path}\"",
+            ">",
+            os.devnull
+        )))
+
+        # Cleanup superfluous documents
+        for ext in (".tex", self.dvi_ext, ".log", ".aux"):
+            try:
+                os.remove(root + ext)
+            except FileNotFoundError:
+                pass
+
+        print(" " * len(displayed_msg), end="\r")
+        return svg_file_path
+
+    def add_preamble(self, *preamble_strs: str):
+        self.preamble.extend(preamble_strs)
+        return self