[FIX] Allow display math mode.

latex.py

@@ -1,7 +1,8 @@
 # Converts a TeX file into a PNG/SVG file.
 template = r"""
-\documentclass[utf8]{{standalone}}
+\documentclass[utf8,preview]{{standalone}}
     \usepackage{{amsmath}}
+    \usepackage[active,tightpage]{{preview}}
     \usepackage[utf8]{{inputenc}}
     % TODO: Add user packages here.
 \begin{{document}}
@@ -19,9 +20,9 @@ def render(user: str, source: str, png: bool = True) -> str:
     fmt = template.format(content=source)
 
     tmp = tempfile.NamedTemporaryFile(delete=False)
-    print(tmp.name)
     tmp.write(bytes(fmt, encoding="utf8"))
     tmp.close()
+    print(tmp.name)
     # Parse our templated file thru' LaTeX and dvipng.
     # TODO: Allow arbitrary DPI and foreground color.
     ret = subprocess.run(["latex", "-halt-on-error", tmp.name], cwd="/tmp", capture_output=True)

main.py

@@ -2,11 +2,11 @@ from nio import *
 
 import asyncio
 import yaml
-import os
 
 
 async def send_png(room: MatrixRoom, filename: str) -> None:
     import imagesize
+    import os
     basename = os.path.basename(filename)
     w, h = imagesize.get(filename)
 
@@ -38,7 +38,10 @@ async def send_png(room: MatrixRoom, filename: str) -> None:
 async def msg_cb(room: MatrixRoom, event: RoomMessageText) -> None:
     import re
     import latex
-    for tex in re.findall('((?:\$[^\$]+\$)|(?:\$\$[^\$]+\$\$))', event.body, re.M):
+    if event.sender == client.user_id:
+        return
+
+    for tex in re.findall(r'((?:\$[^\$]+\$)|(?:\$\$[^\$]+\$\$)|(?:\\\[[^\]]+\\\]))', event.body, re.M):
         print("Text:", tex)
         try:
             filename = latex.render("", tex)
@@ -92,7 +95,7 @@ async def main() -> None:
     client.user_id = user
 
     # Bad kludge!
-    await client.sync(timeout=300000)
+    await client.sync(timeout=3000)
 
     # Register all of the callbacks
     client.add_event_callback(msg_cb, RoomMessageText)