Update app.py

app.py

@@ -11,21 +11,21 @@ from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
 from reportlab.lib import colors
 from reportlab.pdfbase import pdfmetrics
 from reportlab.pdfbase.ttfonts import TTFont
+import unicodedata
 
 st.set_page_config(layout="wide", initial_sidebar_state="collapsed")
 
 def create_pdf_tab(default_markdown):
     # Dynamically load all .ttf fonts from the current directory
-    # Fonts are sourced from: https://fonts.google.com/download/next-steps
     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., NotoColorEmoji-Regular.ttf or NotoEmoji-Regular.ttf.")
+        st.error("No .ttf font files found in the current directory. Please add some, e.g., NotoEmoji-Regular.ttf.")
         return
     available_fonts = {os.path.splitext(os.path.basename(f))[0]: f for f in font_files}
 
     # Sidebar configuration
     with st.sidebar:
-        selected_font_name = st.selectbox("Select Font", options=list(available_fonts.keys()), index=0 if "NotoColorEmoji-Regular" in available_fonts else 0)
+        selected_font_name = st.selectbox("Select Font", options=list(available_fonts.keys()), index=0 if "NotoEmoji-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)
@@ -42,18 +42,16 @@ def create_pdf_tab(default_markdown):
         
         st.download_button(label="Save Markdown", data=st.session_state.markdown_content, file_name="deities_guide.md", mime="text/markdown")
 
-    # Register the selected font
-    # Noto Color Emoji is a color font, which ReportLab may not render correctly (monochrome only).
-    # If emojis don’t show, try a monochrome font like NotoEmoji-Regular.ttf as a fallback.
+    # Register the selected font and a fallback font
     try:
         pdfmetrics.registerFont(TTFont(selected_font_name, selected_font_path))
+        # Register a fallback font (e.g., Helvetica) for non-emoji text
+        pdfmetrics.registerFont(TTFont("Helvetica", "Helvetica.ttf"))  # Ensure Helvetica is available
     except Exception as e:
         st.error(f"Failed to register font {selected_font_name}: {e}")
         return
 
-    # Emoji font application
-    # We apply the selected font to emojis, falling back to plain text if the font doesn’t support them.
-    # ReportLab needs explicit font tagging for emojis; Noto Color Emoji may need special handling.
+    # Emoji font application with fallback
     def apply_emoji_font(text, emoji_font):
         emoji_pattern = re.compile(
             r"([\U0001F300-\U0001F5FF"  # Miscellaneous Symbols and Pictographs
@@ -69,13 +67,29 @@ def create_pdf_tab(default_markdown):
             r"\u2700-\u27BF]+"        # Dingbats (e.g., ✝ U+271D)
             r")"
         )
+
         def replace_emoji(match):
             emoji = match.group(1)
-            if len(emoji) > 1:  # Limit to first character to avoid multi-codepoint issues
-                emoji = emoji[0]
-            # Wrap emoji in font tag; if it doesn’t render, it’ll show as text
+            # Normalize emoji to avoid multi-codepoint issues (e.g., combining characters)
+            emoji = unicodedata.normalize('NFC', emoji)
+            # Wrap emoji in font tag; if it doesn’t render, it’ll fall back to text
             return f'<font face="{emoji_font}">{emoji}</font>'
-        return emoji_pattern.sub(replace_emoji, text)
+
+        # Split text into segments: emoji and non-emoji
+        segments = []
+        last_pos = 0
+        for match in emoji_pattern.finditer(text):
+            start, end = match.span()
+            # Add non-emoji text with Helvetica
+            if last_pos < start:
+                segments.append(f'<font face="Helvetica">{text[last_pos:start]}</font>')
+            # Add emoji with the selected font
+            segments.append(replace_emoji(match))
+            last_pos = end
+        # Add remaining non-emoji text
+        if last_pos < len(text):
+            segments.append(f'<font face="Helvetica">{text[last_pos:]}</font>')
+        return ''.join(segments)
 
     # Markdown to PDF content
     def markdown_to_pdf_content(markdown_text, plain_text_mode, auto_bold_numbers):
@@ -122,7 +136,7 @@ def create_pdf_tab(default_markdown):
         item_font_size = base_font_size
         section_font_size = base_font_size * 1.1
 
-        # Use Helvetica as a fallback for text, emoji font for emojis
+        # Define styles with explicit font names
         section_style = ParagraphStyle(
             'SectionStyle', parent=styles['Heading2'], fontName="Helvetica-Bold",
             textColor=colors.darkblue, fontSize=section_font_size, leading=section_font_size * 1.2, spaceAfter=2
@@ -210,6 +224,7 @@ def create_pdf_tab(default_markdown):
     with st.sidebar:
         st.download_button(label="Download PDF", data=pdf_bytes, file_name="deities_guide.pdf", mime="application/pdf")
 
+# Your default markdown content remains unchanged
 default_markdown = """# Deities Guide: Mythology and Moral Lessons 🌟
 
 1. 📜 Introduction