From e23504613f8526b90a497512c086ed48e66cde95 Mon Sep 17 00:00:00 2001
From: toasted-nutbread <toasted-nutbread@users.noreply.github.com>
Date: Sun, 21 Jun 2020 16:07:51 -0400
Subject: Use DOMTextScanner (#536)

* Use DOMTextScanner instead of TextSourceRange.seek*

* Move getNodesInRange to dom.js

* Move anyNodeMatchesSelector to dom.js

* Remove unused functions

* Update tests

* Add layoutAwareScan option

* Use layoutAwareScan for source and sentence scanning

* Remove unused IGNORE_TEXT_PATTERN
---
 ext/fg/js/document.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'ext/fg/js/document.js')

diff --git a/ext/fg/js/document.js b/ext/fg/js/document.js
index d639bc86..c288502c 100644
--- a/ext/fg/js/document.js
+++ b/ext/fg/js/document.js
@@ -17,6 +17,7 @@
 
 /* global
  * DOM
+ * DOMTextScanner
  * TextSourceElement
  * TextSourceRange
  */
@@ -152,14 +153,14 @@ function docRangeFromPoint(x, y, deepDomScan) {
     }
 }
 
-function docSentenceExtract(source, extent) {
+function docSentenceExtract(source, extent, layoutAwareScan) {
     const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
     const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
     const terminators = '…。．.？?！!';
 
     const sourceLocal = source.clone();
-    const position = sourceLocal.setStartOffset(extent);
-    sourceLocal.setEndOffset(extent * 2 - position, true);
+    const position = sourceLocal.setStartOffset(extent, layoutAwareScan);
+    sourceLocal.setEndOffset(extent * 2 - position, layoutAwareScan, true);
     const content = sourceLocal.text();
 
     let quoteStack = [];
@@ -232,7 +233,7 @@ function isPointInRange(x, y, range) {
     const nodePre = range.endContainer;
     const offsetPre = range.endOffset;
     try {
-        const {node, offset, content} = TextSourceRange.seekForward(range.endContainer, range.endOffset, 1);
+        const {node, offset, content} = new DOMTextScanner(range.endContainer, range.endOffset, true, false).seek(1);
         range.setEnd(node, offset);
 
         if (!isWhitespace(content) && DOM.isPointInAnyRect(x, y, range.getClientRects())) {
@@ -243,7 +244,7 @@ function isPointInRange(x, y, range) {
     }
 
     // Scan backward
-    const {node, offset, content} = TextSourceRange.seekBackward(range.startContainer, range.startOffset, 1);
+    const {node, offset, content} = new DOMTextScanner(range.startContainer, range.startOffset, true, false).seek(-1);
     range.setStart(node, offset);
 
     if (!isWhitespace(content) && DOM.isPointInAnyRect(x, y, range.getClientRects())) {
-- 
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