| """ |
| Code browser example. |
| |
| Run with: |
| |
| python code_browser.py PATH |
| |
| """ |
|
|
| import sys |
|
|
| from rich.syntax import Syntax |
| from rich.traceback import Traceback |
| from textual.app import App, ComposeResult |
| from textual.containers import Container, Vertical |
| from textual.reactive import var |
| from textual.widgets import DirectoryTree, Footer, Header, Static |
|
|
|
|
| class CodeBrowser(App): |
| """Textual code browser app.""" |
|
|
| CSS_PATH = "code_browser.css" |
| BINDINGS = [ |
| ("f", "toggle_files", "Toggle Files"), |
| ("q", "quit", "Quit"), |
| ] |
|
|
| show_tree = var(True) |
|
|
| def watch_show_tree(self, show_tree: bool) -> None: |
| """Called when show_tree is modified.""" |
| self.set_class(show_tree, "-show-tree") |
|
|
| def compose(self) -> ComposeResult: |
| """Compose our UI.""" |
| path = "./" if len(sys.argv) < 2 else sys.argv[1] |
| yield Header() |
| yield Container( |
| Vertical(DirectoryTree(path), id="tree-view"), |
| Vertical(Static(id="code", expand=True), id="code-view"), |
| ) |
| yield Footer() |
|
|
| def on_directory_tree_file_click(self, event: DirectoryTree.FileClick) -> None: |
| """Called when the user click a file in the directory tree.""" |
| code_view = self.query_one("#code", Static) |
| try: |
| syntax = Syntax.from_path( |
| event.path, |
| line_numbers=True, |
| word_wrap=False, |
| indent_guides=True, |
| theme="github-dark", |
| ) |
| except Exception: |
| code_view.update(Traceback(theme="github-dark", width=None)) |
| self.sub_title = "ERROR" |
| else: |
| code_view.update(syntax) |
| self.query_one("#code-view").scroll_home(animate=False) |
| self.sub_title = event.path |
|
|
| def action_toggle_files(self) -> None: |
| """Called in response to key binding.""" |
| self.show_tree = not self.show_tree |
|
|
|
|
| if __name__ == "__main__": |
| CodeBrowser().run() |
|
|
