lite hjälpfunktioner för text och en textruta att skriva i

src/lib/textarea/main.ts

@@ -0,0 +1,33 @@
+export const insertText = (textarea, text) => {
+  const start = textarea.selectionStart;
+  const end = textarea.selectionStart + text.length;
+  textarea.setRangeText(text, start, end, "end");
+};
+
+export const insertExpandedPhrase = (textarea, expander, len, text) => {
+  const start = textarea.selectionStart - len;
+  const end = textarea.selectionStart;
+  textarea.setRangeText(text.concat(expander), start, end, "end");
+};
+
+const findIndexOfCurrentWord = (textarea) => {
+  const currentValue = textarea.value;
+  const cursorPos = textarea.selectionStart;
+
+  let startIndex = cursorPos - 1;
+  while (
+    startIndex >= 0 &&
+    /\p{Letter}|\p{Number}/u.test(currentValue[startIndex])
+  ) {
+    console.log(currentValue[startIndex]);
+    startIndex--;
+  }
+  return startIndex;
+};
+
+export const getCurrentWord = (textarea) => {
+  const currentValue = textarea.value;
+  const cursorPos = textarea.selectionStart;
+  const startIndex = findIndexOfCurrentWord(textarea);
+  return currentValue.substring(startIndex + 1, cursorPos);
+};

src/routes/+page.svelte

@@ -1,2 +1,7 @@
-<h1>Welcome to SvelteKit</h1>
+<script lang="ts">
-<p>Visit <a href="https://svelte.dev/docs/kit">svelte.dev/docs/kit</a> to read the documentation</p>
+	import Textarea from './textarea.svelte';
+</script>
+
+<div class="h-full w-full" role="application">
+	<Textarea />
+</div>

src/routes/textarea.svelte

@@ -0,0 +1,72 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { browser } from '$app/environment';
+
+	import { getCurrentWord, insertExpandedPhrase, insertText } from '$lib/textarea/main';
+
+	let state = {
+		capitalizeNext: true,
+		currentWord: ''
+	};
+
+	let textarea;
+	let text = '';
+
+	onMount(() => {
+		if (browser) {
+			let t = document.getElementById('doc');
+			if (t != null) {
+				textarea = t;
+				setTimeout(() => {
+					textarea.focus();
+					console.log('focus the textarae');
+				}, 25);
+			}
+		}
+	});
+
+	const change = () => {
+		if (textarea != null) {
+			if (textarea.value.length == 0) {
+				state.capitalizeNext = true;
+			}
+		}
+	};
+	const input = (e) => {
+		if (e.inputType == 'insertText') {
+			const key = e.data || '';
+			if (e.data == null) return;
+			if (state.capitalizeNext) {
+				insertText(textarea, key.toUpperCase());
+				state.capitalizeNext = false;
+				e.preventDefault();
+			}
+			//expand(e);
+		}
+		if (e.inputType == 'insertText') {
+		}
+	};
+	/* const hotkeyHandler = (e: KeyboardEvent) => {
+		if (e.key == 'F4') {
+			state.textarea.value = '';
+		}
+	};
+	*/
+</script>
+
+<div class="docContainer" role="application" id="docContainer">
+	<textarea id="doc" rows="4" on:keyup={change} on:beforeinput={input} bind:value={text}></textarea>
+</div>
+
+<style lang="postcss">
+	.docContainer {
+		width: 100%;
+	}
+	.docContainer textarea {
+		width: 100%;
+		color: black;
+		padding: 0.3em;
+		resize: none;
+		font-size: 2em;
+	}
+</style>