Pin message composer to the bottom of the new assistant panel (#11186)

Release Notes:

- N/A

---------

Co-authored-by: Marshall <marshall@zed.dev>
Co-authored-by: Nate <nate@zed.dev>
Co-authored-by: Kyle <kylek@zed.dev>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/assistant2/examples/chat_with_functions.rs

@@ -4,15 +4,17 @@ use anyhow::{Context as _, Result};
 use assets::Assets;
 use assistant2::AssistantPanel;
 use assistant_tooling::{LanguageModelTool, ToolRegistry};
-use client::Client;
-use gpui::{actions, AnyElement, App, AppContext, KeyBinding, Task, View, WindowOptions};
+use client::{Client, UserStore};
+use fs::Fs;
+use futures::StreamExt as _;
+use gpui::{actions, AnyElement, App, AppContext, KeyBinding, Model, Task, View, WindowOptions};
 use language::LanguageRegistry;
 use project::Project;
 use rand::Rng;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use settings::{KeymapFile, DEFAULT_KEYMAP_PATH};
-use std::sync::Arc;
+use std::{path::PathBuf, sync::Arc};
 use theme::LoadThemes;
 use ui::{div, prelude::*, Render};
 use util::ResultExt as _;
@@ -159,6 +161,121 @@ impl LanguageModelTool for RollDiceTool {
     }
 }
 
+struct FileBrowserTool {
+    fs: Arc<dyn Fs>,
+    root_dir: PathBuf,
+}
+
+impl FileBrowserTool {
+    fn new(fs: Arc<dyn Fs>, root_dir: PathBuf) -> Self {
+        Self { fs, root_dir }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
+struct FileBrowserParams {
+    command: FileBrowserCommand,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
+enum FileBrowserCommand {
+    Ls { path: PathBuf },
+    Cat { path: PathBuf },
+}
+
+#[derive(Serialize, Deserialize)]
+enum FileBrowserOutput {
+    Ls { entries: Vec<String> },
+    Cat { content: String },
+}
+
+pub struct FileBrowserView {
+    result: Result<FileBrowserOutput>,
+}
+
+impl Render for FileBrowserView {
+    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
+        let Ok(output) = self.result.as_ref() else {
+            return h_flex().child("Failed to perform operation");
+        };
+
+        match output {
+            FileBrowserOutput::Ls { entries } => v_flex().children(
+                entries
+                    .into_iter()
+                    .map(|entry| h_flex().text_ui(cx).child(entry.clone())),
+            ),
+            FileBrowserOutput::Cat { content } => h_flex().child(content.clone()),
+        }
+    }
+}
+
+impl LanguageModelTool for FileBrowserTool {
+    type Input = FileBrowserParams;
+    type Output = FileBrowserOutput;
+    type View = FileBrowserView;
+
+    fn name(&self) -> String {
+        "file_browser".to_string()
+    }
+
+    fn description(&self) -> String {
+        "A tool for browsing the filesystem.".to_string()
+    }
+
+    fn execute(&self, input: &Self::Input, cx: &AppContext) -> Task<gpui::Result<Self::Output>> {
+        cx.spawn({
+            let fs = self.fs.clone();
+            let root_dir = self.root_dir.clone();
+            let input = input.clone();
+            |_cx| async move {
+                match input.command {
+                    FileBrowserCommand::Ls { path } => {
+                        let path = root_dir.join(path);
+
+                        let mut output = fs.read_dir(&path).await?;
+
+                        let mut entries = Vec::new();
+                        while let Some(entry) = output.next().await {
+                            let entry = entry?;
+                            entries.push(entry.display().to_string());
+                        }
+
+                        Ok(FileBrowserOutput::Ls { entries })
+                    }
+                    FileBrowserCommand::Cat { path } => {
+                        let path = root_dir.join(path);
+
+                        let output = fs.load(&path).await?;
+
+                        Ok(FileBrowserOutput::Cat { content: output })
+                    }
+                }
+            }
+        })
+    }
+
+    fn output_view(
+        _tool_call_id: String,
+        _input: Self::Input,
+        result: Result<Self::Output>,
+        cx: &mut WindowContext,
+    ) -> gpui::View<Self::View> {
+        cx.new_view(|_cx| FileBrowserView { result })
+    }
+
+    fn format(_input: &Self::Input, output: &Result<Self::Output>) -> String {
+        let Ok(output) = output else {
+            return "Failed to perform command: {input:?}".to_string();
+        };
+
+        match output {
+            FileBrowserOutput::Ls { entries } => entries.join("\n"),
+            FileBrowserOutput::Cat { content } => content.to_owned(),
+        }
+    }
+}
+
 fn main() {
     env_logger::init();
     App::new().with_assets(Assets).run(|cx| {
@@ -189,11 +306,16 @@ fn main() {
             Task::ready(()),
             cx.background_executor().clone(),
         ));
+
+        let user_store = cx.new_model(|cx| UserStore::new(client.clone(), cx));
         let node_runtime = node_runtime::RealNodeRuntime::new(client.http_client());
         languages::init(language_registry.clone(), node_runtime, cx);
 
         cx.spawn(|cx| async move {
             cx.update(|cx| {
+                let fs = Arc::new(fs::RealFs::new(None));
+                let cwd = std::env::current_dir().expect("Failed to get current working directory");
+
                 cx.open_window(WindowOptions::default(), |cx| {
                     let mut tool_registry = ToolRegistry::new();
                     tool_registry
@@ -201,6 +323,11 @@ fn main() {
                         .context("failed to register DummyTool")
                         .log_err();
 
+                    tool_registry
+                        .register(FileBrowserTool::new(fs, cwd), cx)
+                        .context("failed to register FileBrowserTool")
+                        .log_err();
+
                     let tool_registry = Arc::new(tool_registry);
 
                     println!("Tools registered");
@@ -208,7 +335,7 @@ fn main() {
                         println!("{}", definition);
                     }
 
-                    cx.new_view(|cx| Example::new(language_registry, tool_registry, cx))
+                    cx.new_view(|cx| Example::new(language_registry, tool_registry, user_store, cx))
                 });
                 cx.activate(true);
             })
@@ -225,11 +352,13 @@ impl Example {
     fn new(
         language_registry: Arc<LanguageRegistry>,
         tool_registry: Arc<ToolRegistry>,
+        user_store: Model<UserStore>,
         cx: &mut ViewContext<Self>,
     ) -> Self {
         Self {
-            assistant_panel: cx
-                .new_view(|cx| AssistantPanel::new(language_registry, tool_registry, cx)),
+            assistant_panel: cx.new_view(|cx| {
+                AssistantPanel::new(language_registry, tool_registry, user_store, cx)
+            }),
         }
     }
 }