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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import React from 'react';
import { Box, Text } from 'ink';
import Spinner from 'ink-spinner';
import {
IndividualToolCallDisplay,
StreamingState,
ToolCallStatus,
} from '../../types.js';
import { DiffRenderer } from './DiffRenderer.js';
import { Colors } from '../../colors.js';
import { MarkdownDisplay } from '../../utils/MarkdownDisplay.js';
const STATIC_HEIGHT = 1;
const RESERVED_LINE_COUNT = 5; // for tool name, status, padding etc.
const STATUS_INDICATOR_WIDTH = 3;
export type TextEmphasis = 'high' | 'medium' | 'low';
export interface ToolMessageProps extends IndividualToolCallDisplay {
availableTerminalHeight: number;
emphasis?: TextEmphasis;
streamingState?: StreamingState;
}
export const ToolMessage: React.FC<ToolMessageProps> = ({
name,
description,
resultDisplay,
status,
availableTerminalHeight,
emphasis = 'medium',
streamingState,
}) => {
const contentHeightEstimate =
availableTerminalHeight - STATIC_HEIGHT - RESERVED_LINE_COUNT;
const resultIsString =
typeof resultDisplay === 'string' && resultDisplay.trim().length > 0;
const lines = React.useMemo(
() => (resultIsString ? resultDisplay.split('\n') : []),
[resultIsString, resultDisplay],
);
// Truncate the overall string content if it's too long.
// MarkdownRenderer will handle specific truncation for code blocks within this content.
// Estimate available height for this specific tool message content area
// This is a rough estimate; ideally, we'd have a more precise measurement.
const displayableResult = React.useMemo(
() =>
resultIsString
? lines.slice(0, contentHeightEstimate).join('\n')
: resultDisplay,
[lines, resultIsString, contentHeightEstimate, resultDisplay],
);
const hiddenLines = lines.length - contentHeightEstimate;
return (
<Box paddingX={1} paddingY={0} flexDirection="column">
<Box minHeight={1}>
{/* Status Indicator */}
<ToolStatusIndicator status={status} streamingState={streamingState} />
<ToolInfo
name={name}
status={status}
description={description}
emphasis={emphasis}
/>
{emphasis === 'high' && <TrailingIndicator />}
</Box>
{displayableResult && (
<Box paddingLeft={STATUS_INDICATOR_WIDTH} width="100%">
<Box flexDirection="column">
{typeof displayableResult === 'string' && (
<Box flexDirection="column">
<MarkdownDisplay
text={displayableResult}
isPending={false}
availableTerminalHeight={availableTerminalHeight}
/>
</Box>
)}
{typeof displayableResult !== 'string' && (
<DiffRenderer
diffContent={displayableResult.fileDiff}
filename={displayableResult.fileName}
/>
)}
{hiddenLines > 0 && (
<Box>
<Text color={Colors.SubtleComment}>
... {hiddenLines} more line{hiddenLines === 1 ? '' : 's'}{' '}
hidden ...
</Text>
</Box>
)}
</Box>
</Box>
)}
</Box>
);
};
type ToolStatusIndicatorProps = {
status: ToolCallStatus;
streamingState?: StreamingState;
};
const ToolStatusIndicator: React.FC<ToolStatusIndicatorProps> = ({
status,
streamingState,
}) => (
<Box minWidth={STATUS_INDICATOR_WIDTH}>
{status === ToolCallStatus.Pending && (
<Text color={Colors.AccentGreen}>o</Text>
)}
{status === ToolCallStatus.Executing &&
(streamingState === StreamingState.Responding ? (
// If the tool is responding that means the user has already confirmed
// this tool call, so we can show a checkmark. The call won't complete
// executing until all confirmations are done. Showing a spinner would
// be misleading as the task is not actually executing at the moment
// and also has flickering issues due to Ink rendering limitations.
// If this hack becomes a problem, we can always add an additional prop
// indicating that the tool was indeed confirmed. If the tool was not
// confirmed we could show a paused version of the spinner.
<Text color={Colors.Gray}>✔</Text>
) : (
<Spinner type="dots" />
))}
{status === ToolCallStatus.Success && (
<Text color={Colors.AccentGreen}>✔</Text>
)}
{status === ToolCallStatus.Confirming && (
<Text color={Colors.AccentYellow}>?</Text>
)}
{status === ToolCallStatus.Canceled && (
<Text color={Colors.AccentYellow} bold>
-
</Text>
)}
{status === ToolCallStatus.Error && (
<Text color={Colors.AccentRed} bold>
x
</Text>
)}
</Box>
);
type ToolInfo = {
name: string;
description: string;
status: ToolCallStatus;
emphasis: TextEmphasis;
};
const ToolInfo: React.FC<ToolInfo> = ({
name,
description,
status,
emphasis,
}) => {
const nameColor = React.useMemo<string>(() => {
switch (emphasis) {
case 'high':
return Colors.Foreground;
case 'medium':
return Colors.Foreground;
case 'low':
return Colors.SubtleComment;
default: {
const exhaustiveCheck: never = emphasis;
return exhaustiveCheck;
}
}
}, [emphasis]);
return (
<Box>
<Text
wrap="truncate-end"
strikethrough={status === ToolCallStatus.Canceled}
>
<Text color={nameColor} bold>
{name}
</Text>{' '}
<Text color={Colors.SubtleComment}>{description}</Text>
</Text>
</Box>
);
};
const TrailingIndicator: React.FC = () => (
<Text color={Colors.Foreground}> ←</Text>
);
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