Create DOM utility file

1 files changed, 46 insertions, 0 deletions

diff --git a/ext/mixed/js/dom.js b/ext/mixed/js/dom.js
new file mode 100644
index 00000000..4525dace
--- /dev/null
+++ b/ext/mixed/js/dom.js
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2019  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/>.
+ */
+
+
+class DOM {
+    static isPointInRect(x, y, rect) {
+        return (
+            x >= rect.left && x < rect.right &&
+            y >= rect.top && y < rect.bottom
+        );
+    }
+
+    static isPointInAnyRect(x, y, rects) {
+        for (const rect of rects) {
+            if (DOM.isPointInRect(x, y, rect)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    static isPointInSelection(x, y, selection) {
+        for (let i = 0; i < selection.rangeCount; ++i) {
+            const range = selection.getRangeAt(i);
+            if (DOM.isPointInAnyRect(x, y, range.getClientRects())) {
+                return true;
+            }
+        }
+        return false;
+    }
+}