Update app.py

app.py

@@ -18,12 +18,12 @@ st.set_page_config(layout="wide", initial_sidebar_state="collapsed")
 def create_pdf_tab(default_markdown):
     font_files = glob.glob("*.ttf")
     if not font_files:
-        st.error("No .ttf font files found in the current directory. Please add some, e.g., NotoEmoji-Regular.ttf.")
+        st.error("No .ttf font files found in the current directory. Please add some, e.g., NotoColorEmoji-Regular.ttf and DejaVuSans.ttf.")
         return
     available_fonts = {os.path.splitext(os.path.basename(f))[0]: f for f in font_files}
 
     with st.sidebar:
-        selected_font_name = st.selectbox("Select Font", options=list(available_fonts.keys()), index=0 if "NotoEmoji-Regular" in available_fonts else 0)
+        selected_font_name = st.selectbox("Select Emoji Font", options=list(available_fonts.keys()), index=0 if "NotoColorEmoji-Regular" in available_fonts else 0)
         selected_font_path = available_fonts[selected_font_name]
         base_font_size = st.slider("Font Size (points)", min_value=6, max_value=16, value=9, step=1)
         plain_text_mode = st.checkbox("Render as Plain Text (Preserve Bold Only)", value=False)
@@ -42,9 +42,9 @@ def create_pdf_tab(default_markdown):
 
     try:
         pdfmetrics.registerFont(TTFont(selected_font_name, selected_font_path))
-        pdfmetrics.registerFont(TTFont("Helvetica", "Helvetica.ttf"))
+        pdfmetrics.registerFont(TTFont("DejaVuSans", "DejaVuSans.ttf"))
     except Exception as e:
-        st.error(f"Failed to register font {selected_font_name}: {e}")
+        st.error(f"Failed to register fonts: {e}. Ensure both {selected_font_name}.ttf and DejaVuSans.ttf are in the directory.")
         return
 
     def apply_emoji_font(text, emoji_font):
@@ -72,11 +72,11 @@ def create_pdf_tab(default_markdown):
         for match in emoji_pattern.finditer(text):
             start, end = match.span()
             if last_pos < start:
-                segments.append(f'<font face="Helvetica">{text[last_pos:start]}</font>')
+                segments.append(f'<font face="DejaVuSans">{text[last_pos:start]}</font>')
             segments.append(replace_emoji(match))
             last_pos = end
         if last_pos < len(text):
-            segments.append(f'<font face="Helvetica">{text[last_pos:]}</font>')
+            segments.append(f'<font face="DejaVuSans">{text[last_pos:]}</font>')
         return ''.join(segments)
 
     def markdown_to_pdf_content(markdown_text, plain_text_mode, auto_bold_numbers):
@@ -123,11 +123,11 @@ def create_pdf_tab(default_markdown):
         section_font_size = base_font_size * 1.1
 
         section_style = ParagraphStyle(
-            'SectionStyle', parent=styles['Heading2'], fontName="Helvetica-Bold",
+            'SectionStyle', parent=styles['Heading2'], fontName="DejaVuSans",
             textColor=colors.darkblue, fontSize=section_font_size, leading=section_font_size * 1.2, spaceAfter=2
         )
         item_style = ParagraphStyle(
-            'ItemStyle', parent=styles['Normal'], fontName="Helvetica",
+            'ItemStyle', parent=styles['Normal'], fontName="DejaVuSans",
             fontSize=item_font_size, leading=item_font_size * 1.15, spaceAfter=1
         )