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https://github.com/getpaseo/paseo.git
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Mohamed Boudra
0a549945b5
Shape rows in native Canvas and CoreText, then place clusters on xterm columns so fallback font advances cannot separate text from its cursor. Wait for measured dimensions before attachment and repaint overhanging ink with affected rows. Use Android platform ICU to avoid bundling approximately 14 MB of data; retain and document the Android 10 conjunct limitation.
28 lines
1.1 KiB
TypeScript
28 lines
1.1 KiB
TypeScript
import type { PaseoTerminalCursor, PaseoTerminalFrame, PaseoTerminalSelection } from "./contract";
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/** A frame as it crosses to native. */
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export interface NativePaseoTerminalFrame {
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columns: number;
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rows: string[];
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cursor?: PaseoTerminalCursor;
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selection?: PaseoTerminalSelection;
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}
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/**
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* Rows cross as `cells;styles;text`, with the numbers comma separated. One string per row keeps
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* prop conversion to a single copy instead of one call per number, and the string is also the
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* native shaping cache key, so an unchanged row costs one lookup.
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*
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* A missing cursor or selection is left out rather than sent as `null`: Expo on iOS fails to
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* convert `null` into an optional record field and then drops the whole frame.
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*/
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export function encodeTerminalFrame(frame: PaseoTerminalFrame): NativePaseoTerminalFrame {
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const native: NativePaseoTerminalFrame = {
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columns: frame.columns,
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rows: frame.rows.map((row) => `${row.cells.join(",")};${row.styles.join(",")};${row.text}`),
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};
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if (frame.cursor) native.cursor = frame.cursor;
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if (frame.selection) native.selection = frame.selection;
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return native;
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}
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