From 0da90fcc62c44d2ac99ce45c8f0fbd4ac53a95f2 Mon Sep 17 00:00:00 2001
From: Ramya Achutha Rao <ramyar@microsoft.com>
Date: Tue, 6 Jun 2017 18:17:36 -0700
Subject: [PATCH] toggle comment across html nodes #27629

---
 extensions/emmet/src/toggleComment.ts | 30 ++++++++++------
 extensions/emmet/src/util.ts          | 51 +++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 10 deletions(-)

diff --git a/extensions/emmet/src/toggleComment.ts b/extensions/emmet/src/toggleComment.ts
index 17aabeaca44..b26e31ad1e2 100644
--- a/extensions/emmet/src/toggleComment.ts
+++ b/extensions/emmet/src/toggleComment.ts
@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import * as vscode from 'vscode';
-import { getNode, isStyleSheet } from './util';
+import { getNode, isStyleSheet, getNodesInBetween } from './util';
 import parse from '@emmetio/html-matcher';
 import parseStylesheet from '@emmetio/css-parser';
 import Node from '@emmetio/node';
@@ -58,19 +58,29 @@ export function toggleComment() {
 }
 
 function toggleCommentHTML(document: vscode.TextDocument, selection: vscode.Selection, rootNode: Node): [vscode.Range[], vscode.Position, vscode.Position] {
-	let offset = document.offsetAt(selection.start);
-	let nodeToUpdate = getNode(rootNode, offset);
-	if (!nodeToUpdate) {
+	const selectionStart = document.offsetAt(selection.isReversed ? selection.active : selection.anchor);
+	const selectionEnd = document.offsetAt(selection.isReversed ? selection.anchor : selection.active);
+
+	let startNode = getNode(rootNode, selectionStart, true);
+	let endNode = getNode(rootNode, selectionEnd, true);
+
+	if (!startNode || !endNode) {
 		return [[], null, null];
 	}
 
-	let rangesToUnComment = getRangesToUnCommentHTML(nodeToUpdate, document);
-	if (nodeToUpdate.type === 'comment') {
+	let allNodes: Node[] = getNodesInBetween(startNode, endNode);
+	let rangesToUnComment: vscode.Range[] = [];
+
+	allNodes.forEach(node => {
+		rangesToUnComment = rangesToUnComment.concat(getRangesToUnCommentHTML(node, document));
+	});
+
+	if (startNode.type === 'comment') {
 		return [rangesToUnComment, null, null];
 	}
 
-	let positionForCommentStart = document.positionAt(nodeToUpdate.start);
-	let positionForCommentEnd = document.positionAt(nodeToUpdate.end);
+	let positionForCommentStart = document.positionAt(allNodes[0].start);
+	let positionForCommentEnd = document.positionAt(allNodes[allNodes.length - 1].end);
 	return [rangesToUnComment, positionForCommentStart, positionForCommentEnd];
 }
 
@@ -95,8 +105,8 @@ function getRangesToUnCommentHTML(node: Node, document: vscode.TextDocument): vs
 
 function toggleCommentStylesheet(document: vscode.TextDocument, selection: vscode.Selection, rootNode: Node): [vscode.Range[], vscode.Position, vscode.Position] {
 
-	let selectionStart = document.offsetAt(selection.anchor);
-	let selectionEnd = document.offsetAt(selection.active);
+	const selectionStart = document.offsetAt(selection.isReversed ? selection.active : selection.anchor);
+	const selectionEnd = document.offsetAt(selection.isReversed ? selection.anchor : selection.active);
 
 	// If current node is commented, then uncomment and return
 	let rangesToUnComment = getRangesToUnCommentStylesheet(rootNode, selectionStart, selectionEnd, document, true);
diff --git a/extensions/emmet/src/util.ts b/extensions/emmet/src/util.ts
index d6b80549fdf..bc3f3893e89 100644
--- a/extensions/emmet/src/util.ts
+++ b/extensions/emmet/src/util.ts
@@ -215,4 +215,55 @@ export function findPrevWord(propertyValue: string, pos: number): [number, numbe
 	}
 
 	return [newSelectionStart, newSelectionEnd];
+}
+
+export function getNodesInBetween(node1: Node, node2: Node): Node[] {
+	// Same node
+	if (sameNodes(node1, node2)) {
+		return [node1];
+	}
+
+	// Same parent
+	if (sameNodes(node1.parent, node2.parent)) {
+		return getNextSiblingsTillPosition(node1, node2.end);
+	}
+
+	// node2 is ancestor of node1
+	if (node2.start < node1.start) {
+		return [node2];
+	}
+
+	// node1 is ancestor of node2
+	if (node2.start < node1.end) {
+		return [node1];
+	}
+
+	// Get the highest ancestor of node1 that should be commented
+	while (node1.parent && node1.parent.end < node2.start) {
+		node1 = node1.parent;
+	}
+
+	// Get the highest ancestor of node2 that should be commented
+	while (node2.parent && node2.parent.start > node1.start) {
+		node2 = node2.parent;
+	}
+
+	return getNextSiblingsTillPosition(node1, node2.end);
+}
+
+function getNextSiblingsTillPosition(node: Node, position: number): Node[] {
+	let siblings: Node[] = [];
+	let currentNode = node;
+	while (currentNode && currentNode.start < position) {
+		siblings.push(currentNode);
+		currentNode = currentNode.nextSibling;
+	}
+	return siblings;
+}
+
+export function sameNodes(node1: Node, node2: Node): boolean {
+	if (!node1 || !node2) {
+		return false;
+	}
+	return node1.start === node2.start && node1.end === node2.end;
 }
\ No newline at end of file
-- 
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