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import { useStore } from '@nanostores/react';
import { memo, useEffect, useMemo, useRef, useState } from 'react';
import { Panel, PanelGroup, PanelResizeHandle, type ImperativePanelHandle } from 'react-resizable-panels';
import {
CodeMirrorEditor,
type EditorDocument,
type EditorSettings,
type OnChangeCallback as OnEditorChange,
type OnSaveCallback as OnEditorSave,
type OnScrollCallback as OnEditorScroll,
} from '~/components/editor/codemirror/CodeMirrorEditor';
import { IconButton } from '~/components/ui/IconButton';
import { PanelHeader } from '~/components/ui/PanelHeader';
import { PanelHeaderButton } from '~/components/ui/PanelHeaderButton';
import { shortcutEventEmitter } from '~/lib/hooks';
import type { FileMap } from '~/lib/stores/files';
import { themeStore } from '~/lib/stores/theme';
import { workbenchStore } from '~/lib/stores/workbench';
import { classNames } from '~/utils/classNames';
import { renderLogger } from '~/utils/logger';
import { isMobile } from '~/utils/mobile';
import { FileTreePanel } from './FileTreePanel';
import { Terminal, type TerminalRef } from './terminal/Terminal';
interface EditorPanelProps {
files?: FileMap;
unsavedFiles?: Set<string>;
editorDocument?: EditorDocument;
selectedFile?: string | undefined;
isStreaming?: boolean;
onEditorChange?: OnEditorChange;
onEditorScroll?: OnEditorScroll;
onFileSelect?: (value?: string) => void;
onFileSave?: OnEditorSave;
onFileReset?: () => void;
}
const MAX_TERMINALS = 3;
const DEFAULT_TERMINAL_SIZE = 25;
const DEFAULT_EDITOR_SIZE = 100 - DEFAULT_TERMINAL_SIZE;
const editorSettings: EditorSettings = { tabSize: 2 };
export const EditorPanel = memo(
({
files,
unsavedFiles,
editorDocument,
selectedFile,
isStreaming,
onFileSelect,
onEditorChange,
onEditorScroll,
onFileSave,
onFileReset,
}: EditorPanelProps) => {
renderLogger.trace('EditorPanel');
const theme = useStore(themeStore);
const showTerminal = useStore(workbenchStore.showTerminal);
const terminalRefs = useRef<Array<TerminalRef | null>>([]);
const terminalPanelRef = useRef<ImperativePanelHandle>(null);
const terminalToggledByShortcut = useRef(false);
const [activeTerminal, setActiveTerminal] = useState(0);
const [terminalCount, setTerminalCount] = useState(1);
const activeFile = useMemo(() => {
if (!editorDocument) {
return '';
}
return editorDocument.filePath.split('/').at(-1);
}, [editorDocument]);
const activeFileUnsaved = useMemo(() => {
return editorDocument !== undefined && unsavedFiles?.has(editorDocument.filePath);
}, [editorDocument, unsavedFiles]);
useEffect(() => {
const unsubscribeFromEventEmitter = shortcutEventEmitter.on('toggleTerminal', () => {
terminalToggledByShortcut.current = true;
});
const unsubscribeFromThemeStore = themeStore.subscribe(() => {
for (const ref of Object.values(terminalRefs.current)) {
ref?.reloadStyles();
}
});
return () => {
unsubscribeFromEventEmitter();
unsubscribeFromThemeStore();
};
}, []);
useEffect(() => {
const { current: terminal } = terminalPanelRef;
if (!terminal) {
return;
}
const isCollapsed = terminal.isCollapsed();
if (!showTerminal && !isCollapsed) {
terminal.collapse();
} else if (showTerminal && isCollapsed) {
terminal.resize(DEFAULT_TERMINAL_SIZE);
}
terminalToggledByShortcut.current = false;
}, [showTerminal]);
const addTerminal = () => {
if (terminalCount < MAX_TERMINALS) {
setTerminalCount(terminalCount + 1);
setActiveTerminal(terminalCount);
}
};
return (
<PanelGroup direction="vertical">
<Panel defaultSize={showTerminal ? DEFAULT_EDITOR_SIZE : 100} minSize={20}>
<PanelGroup direction="horizontal">
<Panel defaultSize={25} minSize={10} collapsible>
<div className="flex flex-col border-r h-full">
<PanelHeader>
<div className="i-ph:tree-structure-duotone shrink-0" />
Files
</PanelHeader>
<FileTreePanel
files={files}
unsavedFiles={unsavedFiles}
selectedFile={selectedFile}
onFileSelect={onFileSelect}
/>
</div>
</Panel>
<PanelResizeHandle />
<Panel className="flex flex-col" defaultSize={75} minSize={20}>
<PanelHeader>
{activeFile && (
<div className="flex items-center flex-1 text-sm">
{activeFile} {isStreaming && <span className="text-xs ml-1 font-semibold">(read-only)</span>}
{activeFileUnsaved && (
<div className="flex gap-1 ml-auto -mr-1.5">
<PanelHeaderButton onClick={onFileSave}>
<div className="i-ph:floppy-disk-duotone" />
Save
</PanelHeaderButton>
<PanelHeaderButton onClick={onFileReset}>
<div className="i-ph:clock-counter-clockwise-duotone" />
Reset
</PanelHeaderButton>
</div>
)}
</div>
)}
</PanelHeader>
<div className="h-full flex-1 overflow-hidden">
<CodeMirrorEditor
theme={theme}
editable={!isStreaming && editorDocument !== undefined}
settings={editorSettings}
doc={editorDocument}
autoFocusOnDocumentChange={!isMobile()}
onScroll={onEditorScroll}
onChange={onEditorChange}
onSave={onFileSave}
/>
</div>
</Panel>
</PanelGroup>
</Panel>
<PanelResizeHandle />
<Panel
ref={terminalPanelRef}
defaultSize={showTerminal ? DEFAULT_TERMINAL_SIZE : 0}
minSize={10}
collapsible
onExpand={() => {
if (!terminalToggledByShortcut.current) {
workbenchStore.toggleTerminal(true);
}
}}
onCollapse={() => {
if (!terminalToggledByShortcut.current) {
workbenchStore.toggleTerminal(false);
}
}}
>
<div className="border-t h-full flex flex-col">
<div className="flex items-center bg-gray-50 min-h-[34px]">
{Array.from({ length: terminalCount }, (_, index) => {
const isActive = activeTerminal === index;
return (
<button
key={index}
className={classNames(
'flex items-center text-sm bg-transparent cursor-pointer gap-1.5 px-3.5 h-full whitespace-nowrap',
{
'bg-white': isActive,
'hover:bg-gray-100': !isActive,
},
)}
onClick={() => setActiveTerminal(index)}
>
<div className="i-ph:terminal-window-duotone text-md" />
Terminal {terminalCount > 1 && index + 1}
</button>
);
})}
{terminalCount < MAX_TERMINALS && (
<IconButton className="ml-2" icon="i-ph:plus" size="md" onClick={addTerminal} />
)}
</div>
{Array.from({ length: terminalCount }, (_, index) => {
const isActive = activeTerminal === index;
return (
<Terminal
key={index}
className={classNames('h-full overflow-hidden', {
hidden: !isActive,
})}
ref={(ref) => {
terminalRefs.current.push(ref);
}}
onTerminalReady={(terminal) => workbenchStore.attachTerminal(terminal)}
onTerminalResize={(cols, rows) => workbenchStore.onTerminalResize(cols, rows)}
theme={theme}
/>
);
})}
</div>
</Panel>
</PanelGroup>
);
},
);
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