refactor: remove web

src/main/frontend/selection.js

@@ -0,0 +1,75 @@
+// Copied from https://stackoverflow.com/a/20336116
+function isDescendant(parent, child) {
+     // from http://stackoverflow.com/questions/2234979/how-to-check-in-javascript-if-one-element-is-a-child-of-another
+     var node = child;
+     while (node != null) {
+         if (node == parent) {
+             return true;
+         }
+         node = node.parentNode;
+     }
+     return false;
+}
+
+function getNodesBetween(rootNode, node1, node2) {
+  var resultNodes = [];
+  var isBetweenNodes = false;
+  for (var i = 0; i < rootNode.childNodes.length; i+= 1) {
+    if (isDescendant(rootNode.childNodes[i], node1) || isDescendant(rootNode.childNodes[i], node2)) {
+      if (resultNodes.length == 0) {
+        isBetweenNodes = true;
+      } else {
+        isBetweenNodes = false;
+      }
+      resultNodes.push(rootNode.childNodes[i]);
+    } else if (resultNodes.length == 0) {
+    } else if (isBetweenNodes) {
+      resultNodes.push(rootNode.childNodes[i]);
+    } else {
+      return resultNodes;
+    }
+  };
+ if (resultNodes.length == 0) {
+    return [rootNode];
+  } else if (isDescendant(resultNodes[resultNodes.length - 1], node1) || isDescendant(resultNodes[resultNodes.length - 1], node2)) {
+    return resultNodes;
+  } else {
+    // same child node for both should never happen
+    return [resultNodes[0]];
+  }
+}
+
+export var getSelectedNodes = function (selectionAncestor, startNode) {
+  // from https://developer.mozilla.org/en-US/docs/Web/API/Selection
+  var selection = null;
+  if(window.getSelection){
+    selection = window.getSelection();
+  } else if(document.selection){
+    selection = document.selection;
+  }
+
+  if(selection) {
+    if (selection.isCollapsed) {
+      return [];
+    };
+    var node2 = selection.focusNode;
+    return getNodesBetween(selectionAncestor, startNode, node2);
+  }
+};
+
+export var clearSelection = function () {
+  var selection = null;
+  if(window.getSelection){
+    selection = window.getSelection();
+  } else if(document.selection){
+    selection = document.selection;
+  }
+  if(selection){
+    if(selection.empty){
+      selection.empty();
+    }
+    if(selection.removeAllRanges){
+      selection.removeAllRanges();
+    }
+  }
+}