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| import streamlit as st | |
| from diff_match_patch import diff_match_patch | |
| import re | |
| def main(): | |
| st.set_page_config(page_title="Text Comparison Tool", layout="wide") | |
| st.title("Text Comparison Tool") | |
| # Initialize session state | |
| if 'old_text' not in st.session_state: | |
| st.session_state.old_text = "" | |
| if 'new_text' not in st.session_state: | |
| st.session_state.new_text = "" | |
| # Create two columns for text areas | |
| col1, col2 = st.columns(2) | |
| with col1: | |
| st.session_state.old_text = st.text_area( | |
| "Old Text:", | |
| height=300, | |
| value=st.session_state.old_text, | |
| placeholder="Enter original text..." | |
| ) | |
| with col2: | |
| # Display diffs directly in the New Text area | |
| new_text_display = st.empty() | |
| # Show either editable text area or diff result | |
| if 'show_diff' not in st.session_state or not st.session_state.show_diff: | |
| st.session_state.new_text = new_text_display.text_area( | |
| "New Text:", | |
| height=300, | |
| value=st.session_state.new_text, | |
| placeholder="Enter modified text...", | |
| key="new_text_editable" | |
| ) | |
| else: | |
| new_text_display.markdown( | |
| st.session_state.diff_html, | |
| unsafe_allow_html=True | |
| ) | |
| # Button controls | |
| col_compare, col_clear, col_copy = st.columns([1, 1, 1]) | |
| with col_compare: | |
| if st.button("Compare"): | |
| dmp = diff_match_patch() | |
| diffs = dmp.diff_main(st.session_state.old_text, st.session_state.new_text) | |
| dmp.diff_cleanupSemantic(diffs) | |
| html = [] | |
| for op, text in diffs: | |
| text = text.replace("\n", "<br>") | |
| if op == 1: # Insertion | |
| html.append(f'<span style="background-color: #c8e6c9; border-radius: 4px; padding: 2px 4px;">{text}</span>') | |
| elif op == -1: # Deletion | |
| html.append(f'<span style="background-color: #ffcdd2; text-decoration: line-through; border-radius: 4px; padding: 2px 4px;">{text}</span>') | |
| else: | |
| html.append(text) | |
| st.session_state.diff_html = "".join(html) | |
| st.session_state.show_diff = True | |
| st.rerun() | |
| with col_clear: | |
| if st.button("Clear"): | |
| st.session_state.old_text = "" | |
| st.session_state.new_text = "" | |
| st.session_state.show_diff = False | |
| st.rerun() | |
| # Copy functionality | |
| with col_copy: | |
| if st.button("Copy Result"): | |
| if 'diff_html' in st.session_state: | |
| clean_text = re.sub(r'<br>', '\n', st.session_state.diff_html) | |
| clean_text = re.sub(r'<[^>]+>', '', clean_text) | |
| try: | |
| import pyperclip | |
| pyperclip.copy(clean_text) | |
| st.success("Result copied to clipboard!") | |
| except: | |
| st.error("Clipboard access requires extra permissions. Please copy manually:") | |
| st.code(clean_text) | |
| else: | |
| st.warning("No comparison result to copy") | |
| if __name__ == "__main__": | |
| main() |