Initial commit for builtin emmet extension #21943

extensions/emmet/src/selectItemStylesheet.ts

@@ -0,0 +1,80 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import { getNode, getDeepestNode } from './util';
+import Node from '@emmetio/node';
+
+export function nextItemStylesheet(selection: vscode.Selection, editor: vscode.TextEditor, rootNode: Node): vscode.Selection {
+	let startOffset = editor.document.offsetAt(selection.anchor);
+	let endOffset = editor.document.offsetAt(selection.active);
+	let currentNode = getNode(rootNode, endOffset, true);
+
+	// Full property is selected, so select property value next
+	if (currentNode.type === 'property' && startOffset === currentNode.start && endOffset === currentNode.end) {
+		return getSelectionFromNode(currentNode, editor.document, true);
+	}
+
+	// Cursor is in the selector or in a property
+	if ((currentNode.type === 'rule' && endOffset < currentNode.selectorToken.end)
+		|| (currentNode.type === 'property' && endOffset < currentNode.valueToken.end)) {
+		return getSelectionFromNode(currentNode, editor.document);
+	}
+
+	// Get the first child of current node which is right after the cursor
+	let nextNode = currentNode.firstChild;
+	while (nextNode && endOffset >= nextNode.end) {
+		nextNode = nextNode.nextSibling;
+	}
+
+	// Get next sibling of current node or the parent
+	while (!nextNode && currentNode) {
+		nextNode = currentNode.nextSibling;
+		currentNode = currentNode.parent;
+	}
+
+	return getSelectionFromNode(nextNode, editor.document);
+
+}
+
+export function prevItemStylesheet(selection: vscode.Selection, editor: vscode.TextEditor, rootNode: Node): vscode.Selection {
+	let startOffset = editor.document.offsetAt(selection.anchor);
+	let currentNode = getNode(rootNode, startOffset);
+	if (!currentNode) {
+		currentNode = rootNode;
+	}
+
+	if (currentNode.type === 'property' || !currentNode.firstChild || (currentNode.type === 'rule' && startOffset <= currentNode.firstChild.start)) {
+		return getSelectionFromNode(currentNode, editor.document);;
+	}
+
+	// Select the child that appears just before the cursor
+	let prevNode = currentNode.firstChild;
+	while (prevNode.nextSibling && prevNode.nextSibling.end <= startOffset) {
+		prevNode = prevNode.nextSibling;
+	}
+	prevNode = getDeepestNode(prevNode);
+
+	return getSelectionFromNode(prevNode, editor.document, true);
+
+}
+
+
+function getSelectionFromNode(node: Node, document: vscode.TextDocument, selectPropertyValue: boolean = false): vscode.Selection {
+	if (!node) {
+		return;
+	}
+
+	let nodeToSelect = node.type === 'rule' ? node.selectorToken : node;
+
+	let selectionStart = (node.type === 'property' && selectPropertyValue) ? node.valueToken.start : nodeToSelect.start;
+	let selectionEnd = (node.type === 'property' && selectPropertyValue) ? node.valueToken.end : nodeToSelect.end;
+
+	return new vscode.Selection(document.positionAt(selectionStart), document.positionAt(selectionEnd));
+
+}
+
+
+