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-rw-r--r--ext/fg/js/source.js44
1 files changed, 44 insertions, 0 deletions
diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index e724488d..385b5001 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -232,6 +232,50 @@ class TextSourceRange {
const writingMode = style.writingMode;
return typeof writingMode === 'string' ? writingMode : 'horizontal-tb';
}
+
+ static getNodesInRange(range) {
+ const end = range.endContainer;
+ const nodes = [];
+ for (let node = range.startContainer; node !== null; node = TextSourceRange.getNextNode(node)) {
+ nodes.push(node);
+ if (node === end) { break; }
+ }
+ return nodes;
+ }
+
+ static getNextNode(node) {
+ let next = node.firstChild;
+ if (next === null) {
+ while (true) {
+ next = node.nextSibling;
+ if (next !== null) { break; }
+
+ next = node.parentNode;
+ if (node === null) { break; }
+
+ node = next;
+ }
+ }
+ return next;
+ }
+
+ static anyNodeMatchesSelector(nodeList, selector) {
+ for (const node of nodeList) {
+ if (TextSourceRange.nodeMatchesSelector(node, selector)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ static nodeMatchesSelector(node, selector) {
+ for (; node !== null; node = node.parentNode) {
+ if (node.nodeType === Node.ELEMENT_NODE) {
+ return node.matches(selector);
+ }
+ }
+ return false;
+ }
}