1efc721990
Scan ~/Pictures/Wallpapers and /usr/share/backgrounds/bos (configurable) and open a bread-theme GTK picker via `breadpaper library` (alias browse). Clicking a thumbnail runs the existing set path. listen honors bread.command.paper.library by spawning that picker.
69 lines
4.1 KiB
Markdown
69 lines
4.1 KiB
Markdown
# breadpaper — bread event integration
|
|
|
|
breadpaper is a wallpaper setter: it works exactly the same with or
|
|
without `breadd` running. When breadd *is* present, a successful
|
|
`breadpaper set` (or the bare-path shorthand) publishes `bread.paper.changed`
|
|
into the shared bread automation fabric, and `breadpaper listen` honors
|
|
`bread.command.paper.set` and `bread.command.paper.library`. See the parent `bread` repo's
|
|
`Documentation.md` — specifically its "Namespaces" and "Integrating a
|
|
bread\* app" sections — for the general convention this follows.
|
|
|
|
App id: **`paper`**. Transport: `bread-utils`'s `bread_client` module
|
|
(feature `bread-client`) — the CLI links it directly. One-shot
|
|
`set`/`get` use `BreadClient::connect("paper")` + `emit` only. The
|
|
long-running `listen` subcommand holds a `subscribe` open.
|
|
|
|
`breadpaper listen` is fail-silent if breadd is down: `subscribe`
|
|
reconnects with backoff and simply delivers nothing until the daemon
|
|
comes back. The one-shot `set`/`get`/`library` path does not require
|
|
`listen`. Modules that want to change the wallpaper without a listener
|
|
can still shell out:
|
|
|
|
```lua
|
|
bread.exec("breadpaper set /path/to/image.png")
|
|
```
|
|
|
|
A workflow that publishes the command instead should wait for the
|
|
confirmation, not assume the emit finished the set:
|
|
|
|
```lua
|
|
bread.emit("bread.command.paper.set", { path = "/path/to/image.png" })
|
|
bread.wait("bread.paper.set.done", { timeout = 10000 })
|
|
```
|
|
|
|
## Events published (`bread.paper.*`)
|
|
|
|
| Event | Data | When |
|
|
|-------|------|------|
|
|
| `bread.paper.changed` | `{ "path": "<wallpaper>" }` | After a successful `set` (awww + wal + `bread-theme reload`), including when `listen` honors `bread.command.paper.set`. `path` is the canonical absolute path that was applied. Not emitted on `get`, and not emitted if any of the three steps fail. |
|
|
| `bread.paper.set.done` | `{ "path": "<wallpaper>" }` | `bread.command.paper.set` was received and `set()` succeeded. `path` is the canonical absolute path that was applied. Not emitted by the one-shot CLI `set` — that path only publishes `changed`. |
|
|
| `bread.paper.set.failed` | `{ "error": "<message>", "path"?: "<requested>" }` | `bread.command.paper.set` was received but `set()` failed, or `data.path` was missing/not a string. `path` is the requested (not canonical) path when one was supplied. |
|
|
| `bread.paper.library.done` | `{}` | `bread.command.paper.library` was received and a `breadpaper library` process was started. Not emitted by the one-shot CLI `library` / `browse`. |
|
|
| `bread.paper.library.failed` | `{ "error": "<message>" }` | `bread.command.paper.library` was received but the library process could not be spawned. |
|
|
|
|
## Commands honored (`bread.command.paper.*`)
|
|
|
|
Honored only while `breadpaper listen` is running. A
|
|
`bread-emit bread.command.paper.set` with no listener is a silent no-op
|
|
— that is the documented bread convention, not a breadpaper bug.
|
|
|
|
| Verb | Data | Effect |
|
|
|------|------|--------|
|
|
| `set` | `{ "path": "..." }` | Calls the existing `set()` (awww + wal + `bread-theme reload`). Emits `bread.paper.set.done` / `.failed`. A successful set also emits `bread.paper.changed`. |
|
|
| `library` | `{}` | Spawns `breadpaper library` (GTK picker). Emits `bread.paper.library.done` once the process is started, or `bread.paper.library.failed` if the spawn fails. Clicking a thumbnail in that window is a normal `set` and publishes `bread.paper.changed`. |
|
|
|
|
### Not implemented: slideshow / random / next
|
|
|
|
`breadpaper library` / `browse` is the in-app picker. Do not invent
|
|
`bread.command.paper.next` / `.random` / `.cycle` (or matching events)
|
|
ahead of a real slideshow feature. Unrecognized verbs are ignored.
|
|
|
|
## Fail-safe behavior
|
|
|
|
- If breadd isn't installed or isn't running, `emit` is a silent no-op
|
|
(`BreadClient::emit` never blocks or errors the caller) — breadpaper
|
|
still sets the wallpaper, generates the palette, and reloads themes.
|
|
- `breadpaper listen` does not exit if breadd is down. The command
|
|
subscription reconnects automatically (`BreadClient::subscribe`'s
|
|
background thread has its own backoff loop); no restart of `listen`
|
|
is needed once breadd returns.
|