79 lines
1.5 KiB
JavaScript
79 lines
1.5 KiB
JavaScript
/**
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* The starting point for running scroll
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*/
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import { Editor, getRuntime, getTermios } from './common/mod.ts';
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import { KeyCommand } from './common/ansi.ts';
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const decoder = new TextDecoder();
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function readKey(raw: Uint8Array): string {
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const parsed = decoder.decode(raw);
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// Return the input if it's unambiguous
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if (parsed in KeyCommand) {
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return parsed;
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}
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// Some keycodes have multiple potential inputs
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switch (parsed) {
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case '\x1bOH':
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case '\x1b[7~':
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case '\x1b[1~':
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case '\x1b[H':
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return KeyCommand.Home;
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case '\x1bOF':
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case '\x1b[8~':
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case '\x1b[4~':
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case '\x1b[F':
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return KeyCommand.End;
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default:
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return parsed;
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}
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}
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export async function main() {
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const runTime = await getRuntime();
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const { term, onExit } = runTime;
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// Setup raw mode, and tear down on error or normal exit
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const t = await getTermios();
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t.enableRawMode();
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onExit(() => {
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t.disableRawMode();
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});
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const terminalSize = await term.getTerminalSize();
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// Create the editor itself
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const editor = new Editor(terminalSize);
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if (term.argv.length > 0) {
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const filename = term.argv[0];
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if (filename.trim() !== '') {
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await editor.open(filename);
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}
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}
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await editor.refreshScreen();
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// The main event loop
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for await (const chunk of term.inputLoop()) {
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// Process input
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const char = readKey(chunk);
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const shouldLoop = editor.processKeyPress(char);
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if (!shouldLoop) {
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return 0;
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}
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// Render output
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await editor.refreshScreen();
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}
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return -1;
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}
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/**
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* Start the event loop
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*/
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await main();
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