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-rw-r--r--extension/content.js55
1 files changed, 55 insertions, 0 deletions
diff --git a/extension/content.js b/extension/content.js
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+++ b/extension/content.js
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+/*
+ * Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+function getRangeAtCursor(e, lookAhead) {
+ const range = document.caretRangeFromPoint(e.clientX, e.clientY);
+ if (range === null) {
+ return null
+ }
+
+ const node = range.startContainer;
+ if (node.nodeType !== 3 /* TEXT_NODE */) {
+ return null;
+ }
+
+ const offset = range.startOffset;
+ const length = Math.min(node.length - offset, lookAhead);
+
+ range.setEnd(node, offset + length);
+ return range;
+}
+
+
+function onMouseDown(e) {
+ const range = getRangeAtCursor(e, 20);
+ if (range === null) {
+ return;
+ }
+
+ const selection = window.getSelection();
+ selection.removeAllRanges();
+ selection.addRange(range);
+
+ e.preventDefault();
+
+ console.log(range.toString());
+}
+
+
+
+window.addEventListener('mousedown', onMouseDown, false);