feat(service): Plugins may define a priority for their results

Adds an additional parameter for prioritizing the search results from a
specific plugin. The plugin may define a priority which will sort
results after the initial pattern search. The web plugin will be the
first plugin to utilize this feature

service/src/lib.rs

@@ -454,6 +454,24 @@ impl<O: Write> Service<O> {
                     other => other,
                 }
             });
+
+            active_search.sort_by(|a, b| {
+                let plug1 = match plugins.get(a.0) {
+                    Some(plug) => plug,
+                    None => return Ordering::Greater,
+                };
+
+                let plug2 = match plugins.get(b.0) {
+                    Some(plug) => plug,
+                    None => return Ordering::Less,
+                };
+
+                plug1
+                    .config
+                    .query
+                    .priority
+                    .cmp(&plug2.config.query.priority)
+            })
         }
 
         let take = if last_query.starts_with('/') | last_query.starts_with('~') {

service/src/plugins/config.rs

@@ -52,6 +52,9 @@ pub struct PluginQuery {
     #[serde(default)]
     pub persistent: bool,
 
+    #[serde(default)]
+    pub priority: PluginPriority,
+
     #[serde(
         default,
         skip_serializing_if = "Option::is_none",
@@ -60,6 +63,19 @@ pub struct PluginQuery {
     pub regex: Option<Cow<'static, str>>,
 }
 
+#[derive(Copy, Clone, Debug, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
+pub enum PluginPriority {
+    High = 0,
+    Default = 1,
+    Low = 2,
+}
+
+impl Default for PluginPriority {
+    fn default() -> Self {
+        Self::Default
+    }
+}
+
 pub fn load(source: &Path, config_path: &Path) -> Option<(PathBuf, PluginConfig, Option<Regex>)> {
     if let Ok(config_bytes) = std::fs::read_to_string(&config_path) {
         let config = match ron::from_str::<PluginConfig>(&config_bytes) {

service/src/plugins/help.rs

@@ -16,6 +16,7 @@ pub const CONFIG: PluginConfig = PluginConfig {
         isolate: true,
         no_sort: true,
         persistent: false,
+        priority: PluginPriority::Default,
         regex: None,
     },
     icon: Some(IconSource::Name(Cow::Borrowed("system-help-symbolic"))),

service/src/plugins/mod.rs

@@ -2,7 +2,7 @@ mod config;
 pub(crate) mod external;
 pub mod help;
 
-pub use self::config::{PluginBinary, PluginConfig, PluginQuery};
+pub use self::config::{PluginBinary, PluginConfig, PluginPriority, PluginQuery};
 pub use self::external::ExternalPlugin;
 pub use self::help::HelpPlugin;