Edit

Edit is the code editor. Its whole job is to get out of the way and show you the code, and it is built around that idea more than any other Singularity app.

Languages

Edit highlights a broad set of languages out of the box. For most of them it leans on GtkSourceView, which recognizes the file by its name and colors it: C, C++, Java, JavaScript, HTML, CSS, XML, Markdown, shell, and many more, with no setup.

For a handful of languages it goes further, using Tree-sitter to understand the structure of the file rather than just its tokens:

• Go
• Rust
• Python
• TypeScript
• TSX and JSX

For these, Edit gives you richer highlighting, an outline of the file, and code folding. The outline and folding are Tree-sitter features, so they appear for the languages above; other languages still get full highlighting, just not the structure view.

Tabs, where you would not expect them

The open files sit as a strip of tabs along the bottom of the window, just above the status bar, rather than across the top. That is deliberate. It keeps the top edge clear and your eyes on the code, and it puts the file switcher somewhere that does not push the code down. When you are reading code, the height of the window is the thing you are short of, and those few pixels matter. The reasoning behind this comes from a small attention study.

Drag a file chip outside the window to detach it into another Edit window. The same editor buffer moves with it, including unsaved changes. Detached windows start with the file browser closed; use the first bubble or F9 to open it. The main window remembers its sidebar state for the next launch.

Built for bubbles

Edit leans on bubble navigation harder than anything else on the desktop. Its toolbar buttons are bubbles floating at the top, the tabs are at the bottom, and everything in between is your code, edge to edge. That is the bubble bar doing exactly what it is for: handing the whole window to what you actually came to look at, and keeping the controls to small pills at the margins.

Reading and moving around

Line numbers and current-line highlighting are on by default. An optional minimap (Alt+M) gives you a bird’s-eye view of long files, the outline panel lists the file’s structure for the Tree-sitter languages, and the command palette (Ctrl+P) lists every action with its shortcut and doubles as a quick way to switch files. Markdown files get a preview pane with Ctrl+Shift+M.

Finding and editing

Find and replace (Ctrl+F, or Ctrl+H for replace) supports case sensitivity, whole words, and regular expressions, with a live match count. Editing has the comforts you expect: auto-indent, smart backspace, bracket matching, and a configurable tab width. Edit reads your desktop dark mode and accent color and regenerates its theme when you change either.

Keyboard shortcuts

Shortcut	Action
Ctrl+N / Ctrl+O / Ctrl+S	New, open, save
Ctrl+W	Close tab
Ctrl+F / Ctrl+H	Find, find and replace
Ctrl+G	Go to line
Ctrl+D	Duplicate line
Ctrl+/	Toggle comment
Alt+Up / Alt+Down	Move line up or down
Ctrl+P	Command palette
F9	Toggle the file browser
Alt+M	Toggle the minimap
Ctrl+Shift+M	Toggle Markdown preview
Ctrl+- / Ctrl+=	Fold, unfold (Tree-sitter languages)