130 lines
3.3 KiB
TypeScript
130 lines
3.3 KiB
TypeScript
import { drawText} from "../runtime/builtins.ts";
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import { getKeysPressed, shiftKeyDown, shiftMap, K } from "../io/keyboard.ts";
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import { font } from "../data/font.ts";
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import { addToContext, evalCode } from "../runtime/runcode.ts";
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import { clearScreen, fillRect } from "../io/window.ts";
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import { COLOR } from "../data/colors.ts";
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const lineHeight = 6;
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const history: Array<string> = [];
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let historyIndex = history.length;
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let textLinesAbove: Array<string> = [];
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let maxLineLen = 0;
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let currentLine = "";
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let index = 0;
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export const resetRepl = () => {
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historyIndex = history.length;
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textLinesAbove.length = 0;
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maxLineLen = 0;
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currentLine = "";
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index = 0;
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}
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const print = (arg: unknown) => {
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textLinesAbove.push(...String(arg).split("\n").flatMap((line)=>{
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const wrap = [];
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while (line.length) {
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wrap.push(line.slice(0,32));
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line = line.slice(32);
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}
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return wrap;
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}));
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textLinesAbove = textLinesAbove.slice(-20);
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}
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const printVal = (arg: unknown) => {
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print(JSON.stringify(arg));
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}
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addToContext("print", print);
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addToContext("printVal", printVal);
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const update = () => {
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// TODO: model this after the newer editmode.ts version using getKeyboardString
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for (const key of getKeysPressed()) {
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let char = String.fromCharCode(key).toLowerCase();
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if (shiftKeyDown()) {
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if (char in shiftMap) {
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char = shiftMap[char as keyof typeof shiftMap];
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} else {
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char = char.toUpperCase();
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}
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}
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if (char in font.chars) {
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currentLine = currentLine.slice(0, index)+char+currentLine.slice(index);
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index += 1;
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} else if (key === K.BACKSPACE) {
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if (index > 0) {
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currentLine = currentLine.slice(0, index-1)+currentLine.slice(index);
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index -= 1;
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}
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} else if (key === K.ARROW_LEFT) {
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index -= 1;
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if (index < 0) {
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index = 0;
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}
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} else if (key === K.ARROW_RIGHT) {
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index += 1;
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if (index > currentLine.length) {
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index = currentLine.length;
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}
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} else if (key === K.ARROW_UP) {
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historyIndex -= 1;
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if (historyIndex < 0) {
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historyIndex = -1;
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}
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const lineAtHistory = history[historyIndex] ?? "";
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currentLine = lineAtHistory;
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index = currentLine.length;
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} else if (key === K.ARROW_DOWN) {
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historyIndex += 1;
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if (historyIndex > history.length) {
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historyIndex = history.length;
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}
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const lineAtHistory = history[historyIndex] ?? "";
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currentLine = lineAtHistory;
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index = currentLine.length;
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} else if (key === K.ENTER) {
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if (currentLine) {
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history.push(currentLine);
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historyIndex = history.length;
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}
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print("> "+currentLine);
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try {
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const ran = evalCode(currentLine);
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if (ran !== undefined) {
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printVal(ran);
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}
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} catch (err) {
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print(err.name+":\n"+err.message);
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}
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maxLineLen = 0;
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currentLine = "";
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index = 0;
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}
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}
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maxLineLen = Math.max(maxLineLen, currentLine.length);
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}
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const drawTextAbove = () => {
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textLinesAbove.forEach((line, i) => {
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fillRect(0, 1+i*lineHeight, 4*(line.length+1)+1, lineHeight+1, COLOR.BLACK);
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drawText(0, 1+i*lineHeight, line);
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});
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}
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const draw = () => {
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clearScreen();
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drawTextAbove();
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fillRect(0, 1+textLinesAbove.length*lineHeight, 4*(2+maxLineLen+1)+1, lineHeight+1, COLOR.BLACK);
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fillRect((2+index)*4, textLinesAbove.length*lineHeight+1, 4, lineHeight-1, COLOR.RED);
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drawText(0, 1+textLinesAbove.length*lineHeight, "> "+currentLine);
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}
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export const repl = {
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update, draw
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} |