docs: update readme

feat/errors

Cargo.lock

@@ -47,9 +47,9 @@ dependencies = [
 
 [[package]]
 name = "cfg-expr"
-version = "0.20.9"
+version = "0.20.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe4ece8474b5f766c63426647e7b4b316b67431ade1036a8313cee24a03ae917"
+checksum = "9ba9e9ec16c447027685b1f897b720e18e9a8afd00bd7332c483537e38086c9f"
 dependencies = [
  "smallvec",
  "target-lexicon",
@@ -231,9 +231,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.189"
+version = "0.2.190"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
+checksum = "ce5d3ddc6d3fa000eb1536d85e147bfe31aacaba692ed6a876f95cb7c855be78"
 
 [[package]]
 name = "libloading"
@@ -247,7 +247,7 @@ dependencies = [
 
 [[package]]
 name = "libnotify-rs"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "bindgen",
  "glib",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libnotify-rs"
-version = "0.2.1"
+version = "0.3.0"
 edition = "2024"
 authors = [ "szymon_jozef"]
 description = "Rust bindings for libnotify"

README.md

@@ -19,14 +19,7 @@
 
 This crate exposes a user friendly (at least I hope), Rust api for [libnotify](https://gitlab.gnome.org/GNOME/libnotify). Made using [bindgen](https://github.com/rust-lang/rust-bindgen).
 
-## Structure
-Project is split into two modules:
-- functions
-- notifications
-
-Which resembles libnotify structure. Every function is named similarly to its libnotify counterpart and it does the same things.
-
-There are some helper structs and enums to make it more approachable to rust folks.
+It comes with basic libnotify calls bindings and higher level abstraction over it.
 
 ## Documentation
 Available at [github pages](https://szymon-jozef.github.io/libnotify-rs/libnotify_rs/index.html);
@@ -65,13 +58,15 @@ Refer to [examples dir](./examples)
 
 Sneak peek for making a notification:
 
+### Without my super cool wrapper (:()
+
 ```rust
-use libnotify_rs::{
+use libnotify_rs::api::{
     functions::{init, uninit},
-    notification::Notification,
+    notification::{self, Notification},
 };
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
+fn main() -> Result<(), LibnotifyError> {
     init("I love coffee")?;
     let mut notify = Notification::new(
         "Remember to drink coffe!",
@@ -79,8 +74,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         None,
     )?;
 
-    notify.set_timeout(libnotify_rs::notification::Timeout::Custom(1000 * 10)); // 10 secs
-    notify.set_urgency(libnotify_rs::notification::Urgency::Critical); // coffee is very important
+    notify.set_timeout(notification::Timeout::Custom(1000 * 10)); // 10 secs
+    notify.set_urgency(notification::Urgency::Critical); // coffee is very important
     notify.set_category("Coffee")?;
 
     notify.show()?;
@@ -91,6 +86,36 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 ```
 
+### With my super cool wrapper (:))
+
+```rust
+use libnotify_rs::{builder::NotificationBuilder, context::LibnotifyContext};
+
+/// Builder is recommended way to interact with libnotify notifications
+
+fn main() -> Result<(), LibnotifyError> {
+    let ctx = LibnotifyContext::new("Coffee addicted reminder")?; // builder requires context
+
+    let notification_builder = NotificationBuilder::new(
+        "Remember about your coffee!",
+        "Only idiots forget about coffee!",
+        None,
+        &ctx,
+    )?
+    .set_urgency(libnotify_rs::api::notification::Urgency::Critical)
+    .set_timeout(libnotify_rs::api::notification::Timeout::Never)
+    .set_category("Coffee")?;
+
+    notification_builder.show()?;
+
+    // you don't need to uninitialize libnotify, cause context already does that!
+
+    Ok(())
+}
+
+```
+
+
 To test those examples use:
 ```bash
 cargo r --example <example name>
@@ -116,6 +141,3 @@ It didn't write any of the actual code, nor any documentation.
 
 ## Roadmap
 I will be happy to fix any bugs that you may find! Just create a new issue, or better yet a pull request.
-
-I'm thinking about a small wrapper around other code, which would initialize libnotify by itself, cleanup after itself, etc. Maybe someday…
-

src/api/errors.rs

@@ -0,0 +1,58 @@
+/// Enum mapping every possible error that can happen in this lib, with a nice enum.
+#[derive(Debug)]
+pub enum LibnotifyError {
+    /// [Libnotify init](https://gnome.pages.gitlab.gnome.org/libnotify/func.init.html) failed
+    InitError,
+    /// `&str` contains a null terminator. Read more at [std documentation](https://doc.rust-lang.org/std/ffi/struct.NulError.html)
+    NulError(std::ffi::NulError),
+    /// [Libnotify notification constructor](https://gnome.pages.gitlab.gnome.org/libnotify/ctor.Notification.new.html) failed allocating
+    NewNotificationError,
+    /// Custom libnotify error with explanation.
+    GerrorError(String),
+    /// Data failed allocating. Could indicate that system doesn't have enough memory
+    AllocationError,
+}
+
+impl std::fmt::Display for LibnotifyError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            LibnotifyError::InitError => {
+                write!(f, "Libnotify failed to init")
+            }
+
+            LibnotifyError::NulError(_) => {
+                write!(f, "Argument contains a null terminator")
+            }
+
+            LibnotifyError::NewNotificationError => {
+                write!(f, "Notification constructor failed")
+            }
+
+            LibnotifyError::GerrorError(e) => {
+                write!(f, "Libnotify returned an error: {}", e)
+            }
+
+            LibnotifyError::AllocationError => {
+                write!(f, "Libnotify failed allocating memory")
+            }
+        }
+    }
+}
+
+impl std::error::Error for LibnotifyError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            LibnotifyError::InitError => None,
+            LibnotifyError::NulError(nul_error) => Some(nul_error),
+            LibnotifyError::NewNotificationError => None,
+            LibnotifyError::GerrorError(_) => None,
+            LibnotifyError::AllocationError => None,
+        }
+    }
+}
+
+impl From<std::ffi::NulError> for LibnotifyError {
+    fn from(value: std::ffi::NulError) -> Self {
+        Self::NulError(value)
+    }
+}

src/api/functions.rs

@@ -1,3 +1,5 @@
+use crate::api::errors::LibnotifyError;
+
 use super::utils::c_str_to_rs_str_and_free;
 
 use super::libnotify::*;
@@ -10,7 +12,7 @@ use super::libnotify::*;
 /// Initialized libnotify. This must be called before any other functions.
 ///
 /// Starting from 0.8, if the provided app_name is NULL, libnotify will try to figure it out from the running application. Before it was not allowed, and was causing libnotify not to be initialized.
-pub fn init<'a, T>(app_name: T) -> Result<(), Box<dyn std::error::Error>>
+pub fn init<'a, T>(app_name: T) -> Result<(), LibnotifyError>
 where
     T: Into<Option<&'a str>>,
 {
@@ -24,7 +26,7 @@ where
         )
     } == 0
     {
-        return Err("Libnotify init failed".into());
+        return Err(LibnotifyError::InitError);
     }
 
     Ok(())
@@ -161,7 +163,7 @@ pub fn get_server_info() -> Option<ServerInfo> {
 */
 
 /// Sets the application name
-pub fn set_app_name(app_name: &str) -> Result<(), std::ffi::NulError> {
+pub fn set_app_name(app_name: &str) -> Result<(), LibnotifyError> {
     let app_name_c = std::ffi::CString::new(app_name)?;
     unsafe { notify_set_app_name(app_name_c.as_ptr()) };
 
@@ -172,7 +174,7 @@ pub fn set_app_name(app_name: &str) -> Result<(), std::ffi::NulError> {
 /// Available since: 0.8.4
 ///
 /// app_icon is icon name or path to an image
-pub fn set_app_icon(app_icon: &str) -> Result<(), std::ffi::NulError> {
+pub fn set_app_icon(app_icon: &str) -> Result<(), LibnotifyError> {
     let app_icon_c = std::ffi::CString::new(app_icon)?;
     unsafe { notify_set_app_icon(app_icon_c.as_ptr()) };
 
@@ -195,11 +197,10 @@ mod tests {
 
     #[test]
     fn test_bad_init() {
-        assert!(
-            init("Mor\0ius")
-                .unwrap_err()
-                .is::<std::ffi::c_str::NulError>()
-        );
+        assert!(matches!(
+            init("Mor\0ius").unwrap_err(),
+            LibnotifyError::NulError(_)
+        ));
     }
 
     #[test]

src/api/mod.rs

@@ -1,3 +1,5 @@
+/// Custom error types
+pub mod errors;
 /// Same as [libnotify global functions](https://gnome.pages.gitlab.gnome.org/libnotify/index.html#functions)
 pub mod functions;
 mod libnotify;

src/api/notification.rs

@@ -1,3 +1,5 @@
+use crate::api::errors::LibnotifyError;
+
 use super::libnotify::*;
 
 #[derive(Debug, Clone, Copy)]
@@ -67,7 +69,7 @@ impl<'a> Notification {
     /// the position of the nul byte.
     ///
     /// On libnotify fail it will return Err(&str.into). May change in the future.
-    pub fn new<T, Y>(summary: &str, body: T, icon: Y) -> Result<Self, Box<dyn std::error::Error>>
+    pub fn new<T, Y>(summary: &str, body: T, icon: Y) -> Result<Self, LibnotifyError>
     where
         T: Into<Option<&'a str>>,
         Y: Into<Option<&'a str>>,
@@ -87,7 +89,7 @@ impl<'a> Notification {
         };
 
         if inner.is_null() {
-            return Err("notify_notification_new returned null".into());
+            return Err(LibnotifyError::NewNotificationError);
         }
 
         Ok(Self { inner })
@@ -107,7 +109,7 @@ impl<'a> Notification {
         action: &str,
         label: &str,
         callback: F,
-    ) -> Result<(), Box<dyn std::error::Error>>
+    ) -> Result<(), LibnotifyError>
     where
         F: Fn(&str) + 'static,
     {
@@ -144,19 +146,19 @@ impl<'a> Notification {
     }
 
     /// Synchronously tells the notification server to hide the notification on the screen
-    pub fn close(&self) -> Result<(), Box<dyn std::error::Error>> {
+    pub fn close(&self) -> Result<(), LibnotifyError> {
         let mut gerror = std::ptr::null_mut() as *mut GError;
 
         if unsafe { notify_notification_close(self.inner, &mut gerror) } == 0 {
             if gerror.is_null() {
-                return Err("Unknown error".into());
+                return Err(LibnotifyError::AllocationError);
             }
 
             let e = unsafe { *gerror }.message;
 
             if e.is_null() {
                 unsafe { g_error_free(gerror) };
-                return Err("Unknown error".into());
+                return Err(LibnotifyError::AllocationError);
             }
 
             let e_str = unsafe { std::ffi::CStr::from_ptr(e) }
@@ -165,7 +167,7 @@ impl<'a> Notification {
 
             unsafe { g_error_free(gerror) };
 
-            return Err(e_str.into());
+            return Err(LibnotifyError::GerrorError(e_str));
         }
 
         Ok(())
@@ -191,7 +193,7 @@ impl<'a> Notification {
     /// `set_app_icon()`.
     ///
     /// Available since: 0.8.4
-    pub fn set_app_icon(&mut self, app_icon: &str) -> Result<(), std::ffi::NulError> {
+    pub fn set_app_icon(&mut self, app_icon: &str) -> Result<(), LibnotifyError> {
         let app_icon_c = std::ffi::CString::new(app_icon)?;
         unsafe { notify_notification_set_app_icon(self.inner, app_icon_c.as_ptr()) };
 
@@ -203,7 +205,7 @@ impl<'a> Notification {
     /// If this function is not called, the application name will be set from the value used in init() or overridden with set_app_name().
     ///
     /// Available since: 0.7.3
-    pub fn set_app_name(&mut self, app_name: &str) -> Result<(), std::ffi::NulError> {
+    pub fn set_app_name(&mut self, app_name: &str) -> Result<(), LibnotifyError> {
         let app_name_c = std::ffi::CString::new(app_name)?;
         unsafe { notify_notification_set_app_name(self.inner, app_name_c.as_ptr()) };
 
@@ -213,7 +215,7 @@ impl<'a> Notification {
     /// Sets the category of this notification.
     ///
     /// This can be used by the notification server to filter or display the data in a certain way
-    pub fn set_category(&mut self, category: &str) -> Result<(), std::ffi::NulError> {
+    pub fn set_category(&mut self, category: &str) -> Result<(), LibnotifyError> {
         let category_c = std::ffi::CString::new(category)?;
         unsafe { notify_notification_set_category(self.inner, category_c.as_ptr()) };
 
@@ -223,11 +225,7 @@ impl<'a> Notification {
     /// Sets a hint for key with value value
     ///
     /// Available since: 0.6
-    pub fn set_hint(
-        &mut self,
-        key: &str,
-        value: HintValue,
-    ) -> Result<(), Box<dyn std::error::Error>> {
+    pub fn set_hint(&mut self, key: &str, value: HintValue) -> Result<(), LibnotifyError> {
         let key_c = std::ffi::CString::new(key)?;
 
         let value_c = match value {
@@ -242,7 +240,7 @@ impl<'a> Notification {
         };
 
         if value_c.is_null() {
-            return Err("Couldn't create hint value".into());
+            return Err(LibnotifyError::AllocationError);
         }
 
         unsafe { notify_notification_set_hint(self.inner, key_c.as_ptr(), value_c) };
@@ -275,19 +273,19 @@ impl<'a> Notification {
     }
 
     /// Tells the notification server to display the notification on the screen
-    pub fn show(&self) -> Result<(), Box<dyn std::error::Error>> {
+    pub fn show(&self) -> Result<(), LibnotifyError> {
         let mut gerror = std::ptr::null_mut() as *mut GError;
 
         if unsafe { notify_notification_show(self.inner, &mut gerror) } == 0 {
             if gerror.is_null() {
-                return Err("Unknown error".into());
+                return Err(LibnotifyError::AllocationError);
             }
 
             let err_msg = unsafe { *gerror }.message;
 
             if err_msg.is_null() {
                 unsafe { g_error_free(gerror) };
-                return Err("Unknown error".into());
+                return Err(LibnotifyError::AllocationError);
             }
 
             let err_msg_str = unsafe { std::ffi::CStr::from_ptr(err_msg) }
@@ -295,7 +293,7 @@ impl<'a> Notification {
                 .to_string();
 
             unsafe { g_error_free(gerror) };
-            return Err(err_msg_str.into());
+            return Err(LibnotifyError::GerrorError(err_msg_str));
         }
 
         Ok(())

src/wrappers/builder.rs

@@ -1,5 +1,8 @@
 use crate::{
-    api::notification::{HintValue, Notification, Timeout, Urgency},
+    api::{
+        errors::LibnotifyError,
+        notification::{HintValue, Notification, Timeout, Urgency},
+    },
     wrappers::context::LibnotifyContext,
 };
 
@@ -31,19 +34,19 @@ impl<'a> NotificationBuilder<'a> {
     }
 
     /// Sets app name for this specific notification.
-    pub fn set_app_name(mut self, app_name: &str) -> Result<Self, std::ffi::NulError> {
+    pub fn set_app_name(mut self, app_name: &str) -> Result<Self, LibnotifyError> {
         self.notification.set_app_name(app_name)?;
         Ok(self)
     }
 
     /// Sets app icon fot this specific notification.
-    pub fn set_app_icon(mut self, app_icon: &str) -> Result<Self, std::ffi::NulError> {
+    pub fn set_app_icon(mut self, app_icon: &str) -> Result<Self, LibnotifyError> {
         self.notification.set_app_icon(app_icon)?;
         Ok(self)
     }
 
     /// Sets category for this specific notification
-    pub fn set_category(mut self, category: &str) -> Result<Self, std::ffi::NulError> {
+    pub fn set_category(mut self, category: &str) -> Result<Self, LibnotifyError> {
         self.notification.set_category(category)?;
         Ok(self)
     }

src/wrappers/context.rs

@@ -1,4 +1,7 @@
-use crate::api::functions::{init, is_initted, set_app_icon, set_app_name, uninit};
+use crate::api::{
+    errors::LibnotifyError,
+    functions::{init, is_initted, set_app_icon, set_app_name, uninit},
+};
 
 /// Notification context. Handles libnotify initializing and uninitializing.
 pub struct LibnotifyContext {}
@@ -25,13 +28,13 @@ impl LibnotifyContext {
     }
 
     /// Sets global app name
-    pub fn set_new_name(&self, app_name: &str) -> Result<(), std::ffi::NulError> {
+    pub fn set_new_name(&self, app_name: &str) -> Result<(), LibnotifyError> {
         set_app_name(app_name)?;
         Ok(())
     }
 
     /// Sets global app icon
-    pub fn set_app_icon(&self, app_icon: &str) -> Result<(), std::ffi::NulError> {
+    pub fn set_app_icon(&self, app_icon: &str) -> Result<(), LibnotifyError> {
         set_app_icon(app_icon)?;
         Ok(())
     }