# Source listing

```{image} img/source-listing.png
:alt: The source listing and each component
:class: border
:width: 958px
```

## Search field

The header shows the {ref}`search <searchfox-search>` field.

## Revision

In the file listing, the header shows the currently-showing revision's hash and
the commit message.

## Breadcrumbs

Below the header, breadcrumbs for the file is shown.

You can select different tree from the repository drop down menu there, and also navigate to other directory, or open a context menu for the file symbol.

## Line numbers

Lines can be selected by clicking, optionally with modifier keys. The selected lines are reflected to the URL, and opening URLs with those lines shows the selected lines.

This is handy for sharing a code with pointing specific lines.

- Click the line number selects the line.
- {kbd}`Shift` + click: selects lines by start/end range.
- {kbd}`Ctrl` + click / {kbd}`Cmd` + click: adds/removes individual line from/to the selection.

## Blame strip

See the {ref}`Blame strip <searchfox-blame-strip>` documentation.

## Code coverage

The light-blue line next to the blame strip shows the [code coverage](https://firefox-source-docs.mozilla.org/tools/code-coverage/index.html) information.

Hovering a pointer over the blame strip shows the coverage information, in the same popup as the blame, which shows how many times the line is hit in the automation.

```{image} img/blame.png
:alt: The code coverage information in the blame popup
:class: border
:width: 688px
```

## Nesting header

```{image} img/nesting.png
:alt: The nesting header
:class: border
:width: 659px
```

For nesting structures inside a source code, such as namespaces, classes, functions, etc, Searchfox shows a sticky header for the nesting.

The breadcrumbs also becomes a sticky header.

For variable declarations spans across multiple lines in C++ code, the nesting header is shown if it has 10+ lines.

## Symbols

Clicking each symbol (functions, variables) opens {ref}`Context menu <searchfox-context-menu>`.