@gyro-lang/core/js/writer.js

Fast, Performant and scalable programming language designed for string manipulation and deep recursion.

function update(text) {
	let result_element = document.querySelector("#highlighting-content");
	// Handle final newlines (see article)
	if (text[text.length - 1] == "\n") {
		text += " ";
	}
	// Update code
	result_element.innerHTML = text.replace(new RegExp("&", "g"), "&amp;").replace(new RegExp("<", "g"), "&lt;"); /* Global RegExp */
	// Syntax Highlight
	//Prism.highlightElement(result_element);
}

function sync_scroll(element) {
	/* Scroll result to scroll coords of event - sync with textarea */
	let result_element = document.querySelector("#editing");
	// Get and set x and y
	result_element.scrollTop = element.scrollTop;
	result_element.scrollLeft = element.scrollLeft;
}

function check_tab(element, event) {
	let code = element.value;
	if (event.key == "Tab") {
		/* Tab key pressed */
		event.preventDefault(); // stop normal
		let before_tab = code.slice(0, element.selectionStart); // text before tab
		let after_tab = code.slice(element.selectionEnd, element.value.length); // text after tab
		let cursor_pos = element.selectionEnd + 1; // where cursor moves after tab - moving forward by 1 char to after tab
		element.value = before_tab + "\t" + after_tab; // add tab char
		// move cursor
		element.selectionStart = cursor_pos;
		element.selectionEnd = cursor_pos;
		update(element.value); // Update text to include indent
	}
}