# File Viewer Improvements
## Problem Fixed
The file viewer in the Search page was using `st.text_area()` to display both MD and TXT files, which:
- ❌ Did not render markdown formatting
- ❌ Showed raw markdown code without syntax highlighting
- ❌ Had poor readability for long text files
- ❌ No line numbers for navigation
## Solution Implemented
### Markdown Files (.md)
**New Features:**
1. **Dual View Mode Toggle**
- "Rendered" - Shows beautifully formatted markdown with:
- Headers, lists, code blocks
- Bold, italic, links
- Tables and quotes
- All standard markdown formatting
- "Raw Markdown" - Shows source code with:
- Syntax highlighting for markdown
- Line numbers for easy reference
- Scrollable code block
2. **Better Organization**
- Clear section header: "📄 Rendered Markdown" or "📝 Raw Markdown"
- Container for proper spacing and layout
- Easy toggle to switch between views
### Text Files (.txt)
**New Features:**
1. **Code Block Display**
- Scrollable code block with line numbers
- Monospace font for better readability
- Proper text wrapping
2. **File Information**
- Shows line count for files over 50 lines
- Example: "📊 File contains 248 lines"
3. **Better Layout**
- Section header: "📄 Text File Content"
- Professional code block styling
- Easy to read and navigate
## Test Results
All 4/4 tests passed:
- ✅ Markdown Viewer - PASS
- ✅ Text Viewer - PASS
- ✅ No text_area Usage - PASS
- ✅ Viewer Features - PASS
## How to Use
### Viewing Markdown Files
1. Search for documents in the GUI
2. Click "👁️ View File" on a markdown file
3. Choose view mode:
- **Rendered** - See formatted output (default)
- **Raw Markdown** - See source code with syntax highlighting
4. Toggle between views as needed
### Viewing Text Files
1. Search for documents in the GUI
2. Click "👁️ View File" on a text file
3. View content with:
- Line numbers for easy navigation
- Scrollable display for long files
- Line count information displayed
## Before vs After
### Before
```python
elif file_ext in ['.txt', '.md']:
with open(filepath, 'r', encoding='utf-8', errors='ignore') as f:
content = f.read()
st.text_area("File Content", content, height=400, key=f"viewer_text_{unique_key}")
```
**Issues:**
- Same treatment for MD and TXT
- No markdown rendering
- Text area (editable but not ideal for viewing)
- Fixed height (400px)
- No line numbers
### After
**Markdown Files:**
```python
elif file_ext == '.md':
with open(filepath, 'r', encoding='utf-8', errors='ignore') as f:
content = f.read()
view_mode = st.radio("View Mode", ["Rendered", "Raw Markdown"], ...)
if view_mode == "Rendered":
st.markdown("### 📄 Rendered Markdown")
st.markdown(content, unsafe_allow_html=False)
else:
st.markdown("### 📝 Raw Markdown")
st.code(content, language='markdown', line_numbers=True)
```
**Text Files:**
```python
elif file_ext == '.txt':
with open(filepath, 'r', encoding='utf-8', errors='ignore') as f:
content = f.read()
st.markdown("### 📄 Text File Content")
line_count = content.count('\n') + 1
if line_count > 50:
st.info(f"📊 File contains {line_count} lines")
st.code(content, language='text', line_numbers=True)
```
## Benefits
1. **Better Readability**
- Markdown files show formatted output
- Text files have line numbers and proper spacing
2. **Enhanced Navigation**
- Line numbers make it easy to reference specific lines
- Line count helps understand file size
- Scrollable view for long files
3. **Flexibility**
- Markdown can be viewed rendered or raw
- Easy to copy raw markdown code
- View source when needed
4. **Professional Appearance**
- Clean section headers
- Proper syntax highlighting
- Consistent with modern code viewers
## Testing
To test the improvements:
```cmd
# Start the GUI
launch-gui.bat
# Or manually
python -m streamlit run admin_gui.py
```
1. Go to "🔍 Search" page
2. Search for any document
3. Click "👁️ View File" on a markdown or text file result
4. For .md files:
- Toggle between "Rendered" and "Raw Markdown"
- Verify formatting appears correctly in Rendered mode
- Verify syntax highlighting in Raw mode
5. For .txt files:
- Verify line numbers appear
- Verify content is scrollable
- Verify line count shows for large files
## Files Modified
- `admin_gui.py` (lines 1513-1549)
- Split .md and .txt handling
- Added view mode toggle for markdown
- Implemented rendered markdown display
- Added line numbers and info for text files
## Files Created
- `test_file_viewer.py` - Test suite for viewer improvements
- `FILE_VIEWER_IMPROVEMENTS.md` - This documentation
