Tabs feature

gui/src/components/TabBar/TabBar.tsx

@@ -0,0 +1,263 @@
+import { PlusIcon, XMarkIcon } from "@heroicons/react/24/outline";
+import { useCallback, useEffect, useState } from "react";
+import styled from "styled-components";
+import {
+  defaultBorderRadius,
+  vscBackground,
+  vscEditorBackground,
+  vscForeground,
+} from "..";
+import { useDispatch, useSelector } from "react-redux";
+import { AppDispatch, RootState } from "../../redux/store";
+import { loadSession, saveCurrentSession } from "../../redux/thunks/session";
+import { newSession } from "../../redux/slices/sessionSlice";
+import {
+  addTab,
+  removeTab,
+  setActiveTab,
+  setTabs,
+  updateTab,
+  handleSessionChange,
+} from "../../redux/slices/tabsSlice";
+
+const border = "var(--vscode-editorWidget-border)";
+
+const TabBarContainer = styled.div`
+  display: flex;
+  flex-shrink: 0;
+  flex-grow: 0;
+  overflow-x: auto;
+  background-color: ${vscBackground};
+  border-bottom: none;
+  height: 25px;
+  position: relative;
+  margin-top: 7px;
+
+  /* Hide scrollbar but keep functionality */
+  scrollbar-width: none;
+  &::-webkit-scrollbar {
+    display: none;
+  }
+`;
+
+const Tab = styled.div<{ isActive: boolean }>`
+  display: flex;
+  align-items: center;
+  box-sizing: border-box;
+  padding: 0 5px 0 12px;
+  min-width: 100px;
+  max-width: 200px;
+  height: 100%;
+  background-color: ${(props) =>
+    props.isActive ? vscEditorBackground : "transparent"};
+  color: ${vscForeground};
+  cursor: pointer;
+  border: 1px solid ${border};
+  border-bottom: ${(props) =>
+    props.isActive ? "none" : `1px solid ${border}`};
+  user-select: none;
+  position: relative;
+  transition: background-color 0.2s;
+  border-top: ${(props) =>
+    props.isActive ? `2px solid #fd8c73` : `1px solid ${border}`};
+  &:first-child {
+    border-left: none;
+  }
+  & + & {
+    border-left: none;
+  }
+`;
+
+const TabTitle = styled.span`
+  flex: 1;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  font-size: 13px;
+`;
+
+const CloseButton = styled.button`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 16px;
+  height: 16px;
+  margin-left: 4px;
+  border: none;
+  background: transparent;
+  color: ${vscForeground};
+  opacity: 0.7;
+  cursor: pointer;
+  border-radius: ${defaultBorderRadius};
+  padding: 2px;
+  visibility: hidden;
+
+  &:hover {
+    opacity: 1;
+    background-color: rgba(255, 255, 255, 0.1);
+  }
+
+  ${Tab}:hover & {
+    visibility: visible;
+  }
+
+  &[disabled] {
+    display: none !important;
+  }
+`;
+
+const TabBarSpace = styled.div`
+  flex: 1;
+  display: flex;
+  border-bottom: 1px solid ${border};
+  background-color: ${vscBackground};
+`;
+
+const NewTabButton = styled.button`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 35px;
+  height: 100%;
+  border: none;
+  background: transparent;
+  color: ${vscForeground};
+  cursor: pointer;
+  opacity: 0.7;
+  transition: opacity 0.2s;
+
+  &:hover {
+    opacity: 1;
+    background-color: rgba(255, 255, 255, 0.1);
+  }
+`;
+
+export function TabBar() {
+  const dispatch = useDispatch<AppDispatch>();
+  const currentSessionId = useSelector((state: RootState) => state.session.id);
+  const currentSessionTitle = useSelector(
+    (state: RootState) => state.session.title,
+  );
+  const hasHistory = useSelector(
+    (state: RootState) => state.session.history.length > 0,
+  );
+  const tabs = useSelector((state: RootState) => state.tabs.tabs);
+
+  // Simple UUID generator for our needs
+  const generateId = useCallback(() => {
+    return Date.now().toString(36) + Math.random().toString(36).substring(2);
+  }, []);
+
+  // Update tab title when session title changes
+  useEffect(() => {
+    const activeTab = tabs.find((tab) => tab.isActive);
+    if (currentSessionId && currentSessionId === activeTab?.sessionId) {
+      updateTab({
+        id: currentSessionId,
+        updates: {
+          title: currentSessionTitle,
+        },
+      });
+    }
+  }, [currentSessionTitle]);
+
+  // Handle session changes
+  useEffect(() => {
+    if (!currentSessionId) return;
+
+    dispatch(
+      handleSessionChange({
+        currentSessionId,
+        currentSessionTitle,
+        newTabId: generateId(), // Pass the ID generator result
+      }),
+    );
+  }, [currentSessionId]);
+
+  const handleNewTab = async () => {
+    // Save current session before creating new one
+    if (hasHistory) {
+      await dispatch(saveCurrentSession({ openNewSession: false }));
+    }
+
+    dispatch(newSession());
+
+    dispatch(
+      addTab({
+        id: generateId(),
+        title: `Chat ${tabs.length + 1}`,
+        isActive: true,
+        sessionId: undefined,
+      }),
+    );
+  };
+
+  const handleTabClick = async (id: string) => {
+    const targetTab = tabs.find((tab) => tab.id === id);
+    if (!targetTab) return;
+
+    if (targetTab.sessionId) {
+      // Switch to existing session
+      await dispatch(
+        loadSession({
+          sessionId: targetTab.sessionId,
+          saveCurrentSession: hasHistory,
+        }),
+      );
+    }
+
+    dispatch(setActiveTab(id));
+  };
+
+  const handleTabClose = async (id: string) => {
+    if (tabs.length <= 1) return;
+
+    const isClosingActive = tabs.find((t) => t.id === id)?.isActive;
+    const filtered = tabs.filter((t) => t.id !== id);
+
+    if (filtered.length === 0) return;
+
+    if (isClosingActive) {
+      const lastTab = filtered[filtered.length - 1];
+      await handleTabClick(lastTab.id);
+      dispatch(
+        setTabs(
+          filtered.map((tab, i) => ({
+            ...tab,
+            isActive: i === filtered.length - 1,
+          })),
+        ),
+      );
+    } else {
+      dispatch(removeTab(id));
+    }
+  };
+
+  return (
+    <TabBarContainer>
+      {tabs.map((tab) => (
+        <Tab
+          key={tab.id}
+          isActive={tab.isActive}
+          onClick={() => handleTabClick(tab.id)}
+        >
+          <TabTitle>{tab.title}</TabTitle>
+          <CloseButton
+            disabled={tabs.length === 1}
+            onClick={(e) => {
+              e.stopPropagation();
+              handleTabClose(tab.id);
+            }}
+          >
+            <XMarkIcon width={12} height={12} />
+          </CloseButton>
+        </Tab>
+      ))}
+      <TabBarSpace>
+        <NewTabButton onClick={handleNewTab}>
+          <PlusIcon width={16} height={16} />
+        </NewTabButton>
+      </TabBarSpace>
+    </TabBarContainer>
+  );
+}

gui/src/pages/gui/index.tsx

@@ -1,4 +1,5 @@
 import { History } from "../../components/History";
+import { TabBar } from "../../components/TabBar/TabBar";
 import { Chat } from "./Chat";
 
 export default function GUI() {
@@ -8,6 +9,7 @@ export default function GUI() {
         <History />
       </aside>
       <main className="no-scrollbar flex flex-1 flex-col overflow-y-auto">
+        <TabBar />
         <Chat />
       </main>
     </div>

gui/src/redux/slices/sessionSlice.ts

@@ -340,7 +340,7 @@ export const sessionSlice = createSlice({
               !(!lastMessage.toolCalls?.length && !lastMessage.content) &&
               // And there's a difference in tool call presence
               (lastMessage.toolCalls?.length ?? 0) !==
-                (message.toolCalls?.length ?? 0))
+              (message.toolCalls?.length ?? 0))
           ) {
             // Create a new message
             const historyItem: ChatHistoryItemWithMessageId = {
@@ -485,9 +485,9 @@ export const sessionSlice = createSlice({
       state.allSessionMetadata = state.allSessionMetadata.map((session) =>
         session.sessionId === payload.sessionId
           ? {
-              ...session,
-              ...payload,
-            }
+            ...session,
+            ...payload,
+          }
           : session,
       );
       if (payload.title && payload.sessionId === state.id) {
@@ -522,9 +522,8 @@ export const sessionSlice = createSlice({
         payload.rangeInFileWithContents.filepath,
       );
 
-      const lineNums = `(${
-        payload.rangeInFileWithContents.range.start.line + 1
-      }-${payload.rangeInFileWithContents.range.end.line + 1})`;
+      const lineNums = `(${payload.rangeInFileWithContents.range.start.line + 1
+        }-${payload.rangeInFileWithContents.range.end.line + 1})`;
 
       contextItems.push({
         name: `${fileName} ${lineNums}`,
@@ -730,9 +729,9 @@ function addPassthroughCases(
 ) {
   thunks.forEach((thunk) => {
     builder
-      .addCase(thunk.fulfilled, (state, action) => {})
-      .addCase(thunk.rejected, (state, action) => {})
-      .addCase(thunk.pending, (state, action) => {});
+      .addCase(thunk.fulfilled, (state, action) => { })
+      .addCase(thunk.rejected, (state, action) => { })
+      .addCase(thunk.pending, (state, action) => { });
   });
 }