Add ability to handle other cursors and option

Author: jackycute

src/display/selection.js

@@ -17,7 +17,7 @@ export function prepareSelection(cm, primary) {
   for (let i = 0; i < doc.sel.ranges.length; i++) {
     if (primary === false && i == doc.sel.primIndex) continue
     let range = doc.sel.ranges[i]
-    if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue
+    if (!cm.options.otherCursors && (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom)) continue
     let collapsed = range.empty()
     if (collapsed || cm.options.showCursorWhenSelecting)
       drawSelectionCursor(cm, range.head, curFragment)
@@ -44,6 +44,20 @@ export function drawSelectionCursor(cm, head, output) {
     otherCursor.style.top = pos.other.top + "px"
     otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
   }
+
+  if (cm.options.otherCursors) {
+    var others = cm.display.lineSpace.getElementsByClassName('CodeMirror-other-cursor');
+    for (var i = 0, l = others.length; i < l; i++) {
+        var other = others[i];
+        var line = parseInt(other.getAttribute('data-line'));
+        var ch = parseInt(other.getAttribute('data-ch'));
+        var offsetLeft = parseFloat(other.getAttribute('data-offset-left'));
+        var offsetTop = parseFloat(other.getAttribute('data-offset-top'));
+        var coord = cm.charCoords({line: line, ch: ch}, 'windows');
+        other.style.left = coord.left + offsetLeft + 'px';
+        other.style.top = coord.top + offsetTop + 'px';
+    }
+  }
 }
 
 // Draws the given range as a highlighted selection