Upgrade CodeMirror to 5.10.1 and now support fullscreen, jump-to-line in editor

1 files changed, 357 insertions, 202 deletions

diff --git a/public/vendor/codemirror/lib/codemirror.js b/public/vendor/codemirror/lib/codemirror.js
index 92cacf0f..95a7dc74 100755..100644
--- a/public/vendor/codemirror/lib/codemirror.js
+++ b/public/vendor/codemirror/lib/codemirror.js
@@ -13,7 +13,7 @@
   else if (typeof define == "function" && define.amd) // AMD
     return define([], mod);
   else // Plain browser env
-    this.CodeMirror = mod();
+    (this || window).CodeMirror = mod();
 })(function() {
   "use strict";
 
@@ -21,27 +21,29 @@
 
   // Kludges for bugs and behavior differences that can't be feature
   // detected are enabled based on userAgent etc sniffing.
+  var userAgent = navigator.userAgent;
+  var platform = navigator.platform;
 
-  var gecko = /gecko\/\d/i.test(navigator.userAgent);
-  var ie_upto10 = /MSIE \d/.test(navigator.userAgent);
-  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(navigator.userAgent);
+  var gecko = /gecko\/\d/i.test(userAgent);
+  var ie_upto10 = /MSIE \d/.test(userAgent);
+  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
   var ie = ie_upto10 || ie_11up;
   var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]);
-  var webkit = /WebKit\//.test(navigator.userAgent);
-  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
-  var chrome = /Chrome\//.test(navigator.userAgent);
-  var presto = /Opera\//.test(navigator.userAgent);
+  var webkit = /WebKit\//.test(userAgent);
+  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
+  var chrome = /Chrome\//.test(userAgent);
+  var presto = /Opera\//.test(userAgent);
   var safari = /Apple Computer/.test(navigator.vendor);
-  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
-  var phantom = /PhantomJS/.test(navigator.userAgent);
+  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
+  var phantom = /PhantomJS/.test(userAgent);
 
-  var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
+  var ios = /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
   // This is woefully incomplete. Suggestions for alternative methods welcome.
-  var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
-  var mac = ios || /Mac/.test(navigator.platform);
-  var windows = /win/i.test(navigator.platform);
+  var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
+  var mac = ios || /Mac/.test(platform);
+  var windows = /win/i.test(platform);
 
-  var presto_version = presto && navigator.userAgent.match(/Version\/(\d*\.\d*)/);
+  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
   if (presto_version) presto_version = Number(presto_version[1]);
   if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
   // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
@@ -65,7 +67,7 @@
     setGuttersForLineNumbers(options);
 
     var doc = options.value;
-    if (typeof doc == "string") doc = new Doc(doc, options.mode);
+    if (typeof doc == "string") doc = new Doc(doc, options.mode, null, options.lineSeparator);
     this.doc = doc;
 
     var input = new CodeMirror.inputStyles[options.inputStyle](this);
@@ -87,6 +89,7 @@
       focused: false,
       suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
       pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
+      selectingText: false,
       draggingText: false,
       highlight: new Delayed(), // stores highlight worker timeout
       keySeq: null,  // Unfinished key sequence
@@ -407,7 +410,7 @@
       if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal");
     });
 
-    this.checkedOverlay = false;
+    this.checkedZeroWidth = false;
     // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
     if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px";
   }
@@ -442,29 +445,43 @@
         this.horiz.firstChild.style.width = "0";
       }
 
-      if (!this.checkedOverlay && measure.clientHeight > 0) {
-        if (sWidth == 0) this.overlayHack();
-        this.checkedOverlay = true;
+      if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+        if (sWidth == 0) this.zeroWidthHack();
+        this.checkedZeroWidth = true;
       }
 
       return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0};
     },
     setScrollLeft: function(pos) {
       if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos;
+      if (this.disableHoriz) this.enableZeroWidthBar(this.horiz, this.disableHoriz);
     },
     setScrollTop: function(pos) {
       if (this.vert.scrollTop != pos) this.vert.scrollTop = pos;
+      if (this.disableVert) this.enableZeroWidthBar(this.vert, this.disableVert);
     },
-    overlayHack: function() {
+    zeroWidthHack: function() {
       var w = mac && !mac_geMountainLion ? "12px" : "18px";
-      this.horiz.style.minHeight = this.vert.style.minWidth = w;
-      var self = this;
-      var barMouseDown = function(e) {
-        if (e_target(e) != self.vert && e_target(e) != self.horiz)
-          operation(self.cm, onMouseDown)(e);
-      };
-      on(this.vert, "mousedown", barMouseDown);
-      on(this.horiz, "mousedown", barMouseDown);
+      this.horiz.style.height = this.vert.style.width = w;
+      this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
+      this.disableHoriz = new Delayed;
+      this.disableVert = new Delayed;
+    },
+    enableZeroWidthBar: function(bar, delay) {
+      bar.style.pointerEvents = "auto";
+      function maybeDisable() {
+        // To find out whether the scrollbar is still visible, we
+        // check whether the element under the pixel in the bottom
+        // left corner of the scrollbar box is the scrollbar box
+        // itself (when the bar is still visible) or its filler child
+        // (when the bar is hidden). If it is still visible, we keep
+        // it enabled, if it's hidden, we disable pointer events.
+        var box = bar.getBoundingClientRect();
+        var elt = document.elementFromPoint(box.left + 1, box.bottom - 1);
+        if (elt != bar) bar.style.pointerEvents = "none";
+        else delay.set(1000, maybeDisable);
+      }
+      delay.set(1000, maybeDisable);
     },
     clear: function() {
       var parent = this.horiz.parentNode;
@@ -714,7 +731,7 @@
     // width and height.
     removeChildren(display.cursorDiv);
     removeChildren(display.selectionDiv);
-    display.gutters.style.height = 0;
+    display.gutters.style.height = display.sizer.style.minHeight = 0;
 
     if (different) {
       display.lastWrapHeight = update.wrapperHeight;
@@ -806,7 +823,7 @@
   // given line.
   function updateWidgetHeight(line) {
     if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
-      line.widgets[i].height = line.widgets[i].node.offsetHeight;
+      line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight;
   }
 
   // Do a bulk-read of the DOM positions and sizes needed to draw the
@@ -955,12 +972,22 @@
       lineView.node.removeChild(lineView.gutter);
       lineView.gutter = null;
     }
+    if (lineView.gutterBackground) {
+      lineView.node.removeChild(lineView.gutterBackground);
+      lineView.gutterBackground = null;
+    }
+    if (lineView.line.gutterClass) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                      "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
+                                      "px; width: " + dims.gutterTotalWidth + "px");
+      wrap.insertBefore(lineView.gutterBackground, lineView.text);
+    }
     var markers = lineView.line.gutterMarkers;
     if (cm.options.lineNumbers || markers) {
       var wrap = ensureLineWrapped(lineView);
       var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", "left: " +
-                                             (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
-                                             "px; width: " + dims.gutterTotalWidth + "px");
+                                             (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px");
       cm.display.input.setUneditable(gutterWrap);
       wrap.insertBefore(gutterWrap, lineView.text);
       if (lineView.line.gutterClass)
@@ -1067,10 +1094,6 @@
     if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
   }
 
-  function isReadOnly(cm) {
-    return cm.options.readOnly || cm.doc.cantEdit;
-  }
-
   // This will be set to an array of strings when copying, so that,
   // when pasting, we know what kind of selections the copied text
   // was made out of.
@@ -1082,13 +1105,18 @@
     if (!sel) sel = doc.sel;
 
     var paste = cm.state.pasteIncoming || origin == "paste";
-    var textLines = splitLines(inserted), multiPaste = null;
+    var textLines = doc.splitLines(inserted), multiPaste = null;
     // When pasing N lines into N selections, insert one line per selection
     if (paste && sel.ranges.length > 1) {
-      if (lastCopied && lastCopied.join("\n") == inserted)
-        multiPaste = sel.ranges.length % lastCopied.length == 0 && map(lastCopied, splitLines);
-      else if (textLines.length == sel.ranges.length)
+      if (lastCopied && lastCopied.join("\n") == inserted) {
+        if (sel.ranges.length % lastCopied.length == 0) {
+          multiPaste = [];
+          for (var i = 0; i < lastCopied.length; i++)
+            multiPaste.push(doc.splitLines(lastCopied[i]));
+        }
+      } else if (textLines.length == sel.ranges.length) {
         multiPaste = map(textLines, function(l) { return [l]; });
+      }
     }
 
     // Normal behavior is to insert the new text into every selection
@@ -1120,7 +1148,8 @@
     var pasted = e.clipboardData && e.clipboardData.getData("text/plain");
     if (pasted) {
       e.preventDefault();
-      runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); });
+      if (!cm.isReadOnly() && !cm.options.disableInput)
+        runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); });
       return true;
     }
   }
@@ -1222,13 +1251,14 @@
       });
 
       on(te, "paste", function(e) {
-        if (handlePaste(e, cm)) return true;
+        if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return
 
         cm.state.pasteIncoming = true;
         input.fastPoll();
       });
 
       function prepareCopyCut(e) {
+        if (signalDOMEvent(cm, e)) return
         if (cm.somethingSelected()) {
           lastCopied = cm.getSelections();
           if (input.inaccurateSelection) {
@@ -1256,7 +1286,7 @@
       on(te, "copy", prepareCopyCut);
 
       on(display.scroller, "paste", function(e) {
-        if (eventInWidget(display, e)) return;
+        if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return;
         cm.state.pasteIncoming = true;
         input.focus();
       });
@@ -1268,6 +1298,7 @@
 
       on(te, "compositionstart", function() {
         var start = cm.getCursor("from");
+        if (input.composing) input.composing.range.clear()
         input.composing = {
           start: start,
           range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
@@ -1390,8 +1421,8 @@
       // will be the case when there is a lot of text in the textarea,
       // in which case reading its value would be expensive.
       if (this.contextMenuPending || !cm.state.focused ||
-          (hasSelection(input) && !prevInput) ||
-          isReadOnly(cm) || cm.options.disableInput || cm.state.keySeq)
+          (hasSelection(input) && !prevInput && !this.composing) ||
+          cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
         return false;
 
       var text = input.value;
@@ -1518,6 +1549,10 @@
       }
     },
 
+    readOnlyChanged: function(val) {
+      if (!val) this.reset();
+    },
+
     setUneditable: nothing,
 
     needsContentAttribute: false
@@ -1536,10 +1571,11 @@
     init: function(display) {
       var input = this, cm = input.cm;
       var div = input.div = display.lineDiv;
-      div.contentEditable = "true";
       disableBrowserMagic(div);
 
-      on(div, "paste", function(e) { handlePaste(e, cm); })
+      on(div, "paste", function(e) {
+        if (!signalDOMEvent(cm, e)) handlePaste(e, cm);
+      })
 
       on(div, "compositionstart", function(e) {
         var data = e.data;
@@ -1577,11 +1613,12 @@
 
       on(div, "input", function() {
         if (input.composing) return;
-        if (!input.pollContent())
+        if (cm.isReadOnly() || !input.pollContent())
           runInOp(input.cm, function() {regChange(cm);});
       });
 
       function onCopyCut(e) {
+        if (signalDOMEvent(cm, e)) return
         if (cm.somethingSelected()) {
           lastCopied = cm.getSelections();
           if (e.type == "cut") cm.replaceSelection("", null, "cut");
@@ -1657,8 +1694,13 @@
       try { var rng = range(start.node, start.offset, end.offset, end.node); }
       catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
       if (rng) {
-        sel.removeAllRanges();
-        sel.addRange(rng);
+        if (!gecko && this.cm.state.focused) {
+          sel.collapse(start.node, start.offset);
+          if (!rng.collapsed) sel.addRange(rng);
+        } else {
+          sel.removeAllRanges();
+          sel.addRange(rng);
+        }
         if (old && sel.anchorNode == null) sel.addRange(old);
         else if (gecko) this.startGracePeriod();
       }
@@ -1758,7 +1800,7 @@
         var toNode = display.view[toIndex + 1].node.previousSibling;
       }
 
-      var newText = splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
+      var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
       var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
       while (newText.length > 1 && oldText.length > 1) {
         if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
@@ -1802,17 +1844,24 @@
       this.div.focus();
     },
     applyComposition: function(composing) {
-      if (composing.data && composing.data != composing.startData)
+      if (this.cm.isReadOnly())
+        operation(this.cm, regChange)(this.cm)
+      else if (composing.data && composing.data != composing.startData)
         operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel);
     },
 
     setUneditable: function(node) {
-      node.setAttribute("contenteditable", "false");
+      node.contentEditable = "false"
     },
 
     onKeyPress: function(e) {
       e.preventDefault();
-      operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0);
+      if (!this.cm.isReadOnly())
+        operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0);
+    },
+
+    readOnlyChanged: function(val) {
+      this.div.contentEditable = String(val != "nocursor")
     },
 
     onContextMenu: nothing,
@@ -1914,7 +1963,7 @@
   }
 
   function domTextBetween(cm, from, to, fromLine, toLine) {
-    var text = "", closing = false;
+    var text = "", closing = false, lineSep = cm.doc.lineSeparator();
     function recognizeMarker(id) { return function(marker) { return marker.id == id; }; }
     function walk(node) {
       if (node.nodeType == 1) {
@@ -1928,7 +1977,7 @@
         if (markerID) {
           var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
           if (found.length && (range = found[0].find()))
-            text += getBetween(cm.doc, range.from, range.to).join("\n");
+            text += getBetween(cm.doc, range.from, range.to).join(lineSep);
           return;
         }
         if (node.getAttribute("contenteditable") == "false") return;
@@ -1940,7 +1989,7 @@
         var val = node.nodeValue;
         if (!val) return;
         if (closing) {
-          text += "\n";
+          text += lineSep;
           closing = false;
         }
         text += val;
@@ -2112,7 +2161,7 @@
 
   // Give beforeSelectionChange handlers a change to influence a
   // selection update.
-  function filterSelectionChange(doc, sel) {
+  function filterSelectionChange(doc, sel, options) {
     var obj = {
       ranges: sel.ranges,
       update: function(ranges) {
@@ -2120,7 +2169,8 @@
         for (var i = 0; i < ranges.length; i++)
           this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
                                      clipPos(doc, ranges[i].head));
-      }
+      },
+      origin: options && options.origin
     };
     signal(doc, "beforeSelectionChange", doc, obj);
     if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
@@ -2146,7 +2196,7 @@
 
   function setSelectionNoUndo(doc, sel, options) {
     if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
-      sel = filterSelectionChange(doc, sel);
+      sel = filterSelectionChange(doc, sel, options);
 
     var bias = options && options.bias ||
       (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
@@ -2180,8 +2230,9 @@
     var out;
     for (var i = 0; i < sel.ranges.length; i++) {
       var range = sel.ranges[i];
-      var newAnchor = skipAtomic(doc, range.anchor, bias, mayClear);
-      var newHead = skipAtomic(doc, range.head, bias, mayClear);
+      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
+      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
+      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
       if (out || newAnchor != range.anchor || newHead != range.head) {
         if (!out) out = sel.ranges.slice(0, i);
         out[i] = new Range(newAnchor, newHead);
@@ -2190,54 +2241,59 @@
     return out ? normalizeSelection(out, sel.primIndex) : sel;
   }
 
-  // Ensure a given position is not inside an atomic range.
-  function skipAtomic(doc, pos, bias, mayClear) {
-    var flipped = false, curPos = pos;
-    var dir = bias || 1;
-    doc.cantEdit = false;
-    search: for (;;) {
-      var line = getLine(doc, curPos.line);
-      if (line.markedSpans) {
-        for (var i = 0; i < line.markedSpans.length; ++i) {
-          var sp = line.markedSpans[i], m = sp.marker;
-          if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
-              (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
-            if (mayClear) {
-              signal(m, "beforeCursorEnter");
-              if (m.explicitlyCleared) {
-                if (!line.markedSpans) break;
-                else {--i; continue;}
-              }
-            }
-            if (!m.atomic) continue;
-            var newPos = m.find(dir < 0 ? -1 : 1);
-            if (cmp(newPos, curPos) == 0) {
-              newPos.ch += dir;
-              if (newPos.ch < 0) {
-                if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1));
-                else newPos = null;
-              } else if (newPos.ch > line.text.length) {
-                if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0);
-                else newPos = null;
-              }
-              if (!newPos) {
-                if (flipped) {
-                  // Driven in a corner -- no valid cursor position found at all
-                  // -- try again *with* clearing, if we didn't already
-                  if (!mayClear) return skipAtomic(doc, pos, bias, true);
-                  // Otherwise, turn off editing until further notice, and return the start of the doc
-                  doc.cantEdit = true;
-                  return Pos(doc.first, 0);
-                }
-                flipped = true; newPos = pos; dir = -dir;
-              }
-            }
-            curPos = newPos;
-            continue search;
+  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+    var line = getLine(doc, pos.line);
+    if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
+      var sp = line.markedSpans[i], m = sp.marker;
+      if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+          (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+        if (mayClear) {
+          signal(m, "beforeCursorEnter");
+          if (m.explicitlyCleared) {
+            if (!line.markedSpans) break;
+            else {--i; continue;}
           }
         }
+        if (!m.atomic) continue;
+
+        if (oldPos) {
+          var near = m.find(dir < 0 ? 1 : -1), diff;
+          if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft) near = movePos(doc, near, -dir, line);
+          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+            return skipAtomicInner(doc, near, pos, dir, mayClear);
+        }
+
+        var far = m.find(dir < 0 ? -1 : 1);
+        if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight) far = movePos(doc, far, dir, line);
+        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null;
       }
-      return curPos;
+    }
+    return pos;
+  }
+
+  // Ensure a given position is not inside an atomic range.
+  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+    var dir = bias || 1;
+    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
+    if (!found) {
+      doc.cantEdit = true;
+      return Pos(doc.first, 0);
+    }
+    return found;
+  }
+
+  function movePos(doc, pos, dir, line) {
+    if (dir < 0 && pos.ch == 0) {
+      if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1));
+      else return null;
+    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+      if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0);
+      else return null;
+    } else {
+      return new Pos(pos.line, pos.ch + dir);
     }
   }
 
@@ -2257,7 +2313,7 @@
       var range = doc.sel.ranges[i];
       var collapsed = range.empty();
       if (collapsed || cm.options.showCursorWhenSelecting)
-        drawSelectionCursor(cm, range, curFragment);
+        drawSelectionCursor(cm, range.head, curFragment);
       if (!collapsed)
         drawSelectionRange(cm, range, selFragment);
     }
@@ -2265,8 +2321,8 @@
   }
 
   // Draws a cursor for the given range
-  function drawSelectionCursor(cm, range, output) {
-    var pos = cursorCoords(cm, range.head, "div", null, null, !cm.options.singleCursorHeightPerLine);
+  function drawSelectionCursor(cm, head, output) {
+    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
 
     var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
     cursor.style.left = pos.left + "px";
@@ -2400,8 +2456,8 @@
 
     doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) {
       if (doc.frontier >= cm.display.viewFrom) { // Visible
-        var oldStyles = line.styles;
-        var highlighted = highlightLine(cm, line, state, true);
+        var oldStyles = line.styles, tooLong = line.text.length > cm.options.maxHighlightLength;
+        var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true);
         line.styles = highlighted.styles;
         var oldCls = line.styleClasses, newCls = highlighted.classes;
         if (newCls) line.styleClasses = newCls;
@@ -2410,9 +2466,10 @@
           oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
         for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
         if (ischange) changedLines.push(doc.frontier);
-        line.stateAfter = copyState(doc.mode, state);
+        line.stateAfter = tooLong ? state : copyState(doc.mode, state);
       } else {
-        processLine(cm, line.text, state);
+        if (line.text.length <= cm.options.maxHighlightLength)
+          processLine(cm, line.text, state);
         line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
       }
       ++doc.frontier;
@@ -2557,10 +2614,12 @@
   function prepareMeasureForLine(cm, line) {
     var lineN = lineNo(line);
     var view = findViewForLine(cm, lineN);
-    if (view && !view.text)
+    if (view && !view.text) {
       view = null;
-    else if (view && view.changes)
+    } else if (view && view.changes) {
       updateLineForChanges(cm, view, lineN, getDimensions(cm));
+      cm.curOp.forceUpdate = true;
+    }
     if (!view)
       view = updateExternalMeasurement(cm, line);
 
@@ -2973,12 +3032,12 @@
     var callbacks = group.delayedCallbacks, i = 0;
     do {
       for (; i < callbacks.length; i++)
-        callbacks[i]();
+        callbacks[i].call(null);
       for (var j = 0; j < group.ops.length; j++) {
         var op = group.ops[j];
         if (op.cursorActivityHandlers)
           while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
-            op.cursorActivityHandlers[op.cursorActivityCalled++](op.cm);
+            op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm);
       }
     } while (i < callbacks.length);
   }
@@ -3072,7 +3131,8 @@
 
     if (cm.state.focused && op.updateInput)
       cm.display.input.reset(op.typing);
-    if (op.focus && op.focus == activeElt()) ensureFocus(op.cm);
+    if (op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus()))
+      ensureFocus(op.cm);
   }
 
   function endOperation_finish(op) {
@@ -3387,7 +3447,7 @@
       return dx * dx + dy * dy > 20 * 20;
     }
     on(d.scroller, "touchstart", function(e) {
-      if (!isMouseLikeTouchEvent(e)) {
+      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) {
         clearTimeout(touchFinished);
         var now = +new Date;
         d.activeTouch = {start: now, moved: false,
@@ -3438,9 +3498,11 @@
     on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
 
     d.dragFunctions = {
-      simple: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);},
+      enter: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);},
+      over: function(e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
       start: function(e){onDragStart(cm, e);},
-      drop: operation(cm, onDrop)
+      drop: operation(cm, onDrop),
+      leave: function() {clearDragCursor(cm);}
     };
 
     var inp = d.input.getField();
@@ -3457,8 +3519,9 @@
       var funcs = cm.display.dragFunctions;
       var toggle = value ? on : off;
       toggle(cm.display.scroller, "dragstart", funcs.start);
-      toggle(cm.display.scroller, "dragenter", funcs.simple);
-      toggle(cm.display.scroller, "dragover", funcs.simple);
+      toggle(cm.display.scroller, "dragenter", funcs.enter);
+      toggle(cm.display.scroller, "dragover", funcs.over);
+      toggle(cm.display.scroller, "dragleave", funcs.leave);
       toggle(cm.display.scroller, "drop", funcs.drop);
     }
   }
@@ -3513,7 +3576,7 @@
   // not interfere with, such as a scrollbar or widget.
   function onMouseDown(e) {
     var cm = this, display = cm.display;
-    if (display.activeTouch && display.input.supportsTouch() || signalDOMEvent(cm, e)) return;
+    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return;
     display.shift = e.shiftKey;
 
     if (eventInWidget(display, e)) {
@@ -3531,7 +3594,10 @@
 
     switch (e_button(e)) {
     case 1:
-      if (start)
+      // #3261: make sure, that we're not starting a second selection
+      if (cm.state.selectingText)
+        cm.state.selectingText(e);
+      else if (start)
         leftButtonDown(cm, e, start);
       else if (e_target(e) == display.scroller)
         e_preventDefault(e);
@@ -3566,7 +3632,7 @@
     }
 
     var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained;
-    if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) &&
+    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
         type == "single" && (contained = sel.contains(start)) > -1 &&
         (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) &&
         (cmp(contained.to(), start) > 0 || start.xRel < 0))
@@ -3651,7 +3717,8 @@
       setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
                    {scroll: false, origin: "*mouse"});
     } else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) {
-      setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0));
+      setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                   {scroll: false, origin: "*mouse"});
       startSel = doc.sel;
     } else {
       replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
@@ -3729,6 +3796,7 @@
     }
 
     function done(e) {
+      cm.state.selectingText = false;
       counter = Infinity;
       e_preventDefault(e);
       display.input.focus();
@@ -3742,13 +3810,14 @@
       else extend(e);
     });
     var up = operation(cm, done);
+    cm.state.selectingText = up;
     on(document, "mousemove", move);
     on(document, "mouseup", up);
   }
 
   // Determines whether an event happened in the gutter, and fires the
   // handlers for the corresponding event.
-  function gutterEvent(cm, e, type, prevent, signalfn) {
+  function gutterEvent(cm, e, type, prevent) {
     try { var mX = e.clientX, mY = e.clientY; }
     catch(e) { return false; }
     if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;
@@ -3765,14 +3834,14 @@
       if (g && g.getBoundingClientRect().right >= mX) {
         var line = lineAtHeight(cm.doc, mY);
         var gutter = cm.options.gutters[i];
-        signalfn(cm, type, cm, line, gutter, e);
+        signal(cm, type, cm, line, gutter, e);
         return e_defaultPrevented(e);
       }
     }
   }
 
   function clickInGutter(cm, e) {
-    return gutterEvent(cm, e, "gutterClick", true, signalLater);
+    return gutterEvent(cm, e, "gutterClick", true);
   }
 
   // Kludge to work around strange IE behavior where it'll sometimes
@@ -3781,23 +3850,32 @@
 
   function onDrop(e) {
     var cm = this;
+    clearDragCursor(cm);
     if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
       return;
     e_preventDefault(e);
     if (ie) lastDrop = +new Date;
     var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
-    if (!pos || isReadOnly(cm)) return;
+    if (!pos || cm.isReadOnly()) return;
     // Might be a file drop, in which case we simply extract the text
     // and insert it.
     if (files && files.length && window.FileReader && window.File) {
       var n = files.length, text = Array(n), read = 0;
       var loadFile = function(file, i) {
+        if (cm.options.allowDropFileTypes &&
+            indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+          return;
+
         var reader = new FileReader;
         reader.onload = operation(cm, function() {
-          text[i] = reader.result;
+          var content = reader.result;
+          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) content = "";
+          text[i] = content;
           if (++read == n) {
             pos = clipPos(cm.doc, pos);
-            var change = {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"};
+            var change = {from: pos, to: pos,
+                          text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                          origin: "paste"};
             makeChange(cm.doc, change);
             setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
           }
@@ -3851,6 +3929,25 @@
     }
   }
 
+  function onDragOver(cm, e) {
+    var pos = posFromMouse(cm, e);
+    if (!pos) return;
+    var frag = document.createDocumentFragment();
+    drawSelectionCursor(cm, pos, frag);
+    if (!cm.display.dragCursor) {
+      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
+      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
+    }
+    removeChildrenAndAdd(cm.display.dragCursor, frag);
+  }
+
+  function clearDragCursor(cm) {
+    if (cm.display.dragCursor) {
+      cm.display.lineSpace.removeChild(cm.display.dragCursor);
+      cm.display.dragCursor = null;
+    }
+  }
+
   // SCROLL EVENTS
 
   // Sync the scrollable area and scrollbars, ensure the viewport
@@ -3915,8 +4012,9 @@
 
     var display = cm.display, scroll = display.scroller;
     // Quit if there's nothing to scroll here
-    if (!(dx && scroll.scrollWidth > scroll.clientWidth ||
-          dy && scroll.scrollHeight > scroll.clientHeight)) return;
+    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
+    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
+    if (!(dx && canScrollX || dy && canScrollY)) return;
 
     // Webkit browsers on OS X abort momentum scrolls when the target
     // of the scroll event is removed from the scrollable element.
@@ -3940,10 +4038,15 @@
     // scrolling entirely here. It'll be slightly off from native, but
     // better than glitching out.
     if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
-      if (dy)
+      if (dy && canScrollY)
         setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
       setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
-      e_preventDefault(e);
+      // Only prevent default scrolling if vertical scrolling is
+      // actually possible. Otherwise, it causes vertical scroll
+      // jitter on OSX trackpads when deltaX is small and deltaY
+      // is large (issue #3579)
+      if (!dy || (dy && canScrollY))
+        e_preventDefault(e);
       display.wheelStartX = null; // Abort measurement, if in progress
       return;
     }
@@ -3992,7 +4095,7 @@
     cm.display.input.ensurePolled();
     var prevShift = cm.display.shift, done = false;
     try {
-      if (isReadOnly(cm)) cm.state.suppressEdits = true;
+      if (cm.isReadOnly()) cm.state.suppressEdits = true;
       if (dropShift) cm.display.shift = false;
       done = bound(cm) != Pass;
     } finally {
@@ -4171,12 +4274,13 @@
   // right-click take effect on it.
   function onContextMenu(cm, e) {
     if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return;
+    if (signalDOMEvent(cm, e, "contextmenu")) return;
     cm.display.input.onContextMenu(e);
   }
 
   function contextMenuInGutter(cm, e) {
     if (!hasHandler(cm, "gutterContextMenu")) return false;
-    return gutterEvent(cm, e, "gutterContextMenu", false, signal);
+    return gutterEvent(cm, e, "gutterContextMenu", false);
   }
 
   // UPDATING
@@ -4480,7 +4584,7 @@
   function replaceRange(doc, code, from, to, origin) {
     if (!to) to = from;
     if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
-    if (typeof code == "string") code = splitLines(code);
+    if (typeof code == "string") code = doc.splitLines(code);
     makeChange(doc, {from: from, to: to, text: code, origin: origin});
   }
 
@@ -4724,10 +4828,9 @@
   function findPosH(doc, pos, dir, unit, visually) {
     var line = pos.line, ch = pos.ch, origDir = dir;
     var lineObj = getLine(doc, line);
-    var possible = true;
     function findNextLine() {
       var l = line + dir;
-      if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
+      if (l < doc.first || l >= doc.first + doc.size) return false
       line = l;
       return lineObj = getLine(doc, l);
     }
@@ -4737,14 +4840,16 @@
         if (!boundToLine && findNextLine()) {
           if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
           else ch = dir < 0 ? lineObj.text.length : 0;
-        } else return (possible = false);
+        } else return false
       } else ch = next;
       return true;
     }
 
-    if (unit == "char") moveOnce();
-    else if (unit == "column") moveOnce(true);
-    else if (unit == "word" || unit == "group") {
+    if (unit == "char") {
+      moveOnce()
+    } else if (unit == "column") {
+      moveOnce(true)
+    } else if (unit == "word" || unit == "group") {
       var sawType = null, group = unit == "group";
       var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
       for (var first = true;; first = false) {
@@ -4764,8 +4869,8 @@
         if (dir > 0 && !moveOnce(!first)) break;
       }
     }
-    var result = skipAtomic(doc, Pos(line, ch), origDir, true);
-    if (!possible) result.hitSide = true;
+    var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true);
+    if (!cmp(pos, result)) result.hitSide = true;
     return result;
   }
 
@@ -5057,7 +5162,7 @@
 
     execCommand: function(cmd) {
       if (commands.hasOwnProperty(cmd))
-        return commands[cmd](this);
+        return commands[cmd].call(null, this);
     },
 
     triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
@@ -5152,6 +5257,7 @@
       signal(this, "overwriteToggle", this, this.state.overwrite);
     },
     hasFocus: function() { return this.display.input.getField() == activeElt(); },
+    isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit); },
 
     scrollTo: methodOp(function(x, y) {
       if (x != null || y != null) resolveScrollToPos(this);
@@ -5275,6 +5381,22 @@
     clearCaches(cm);
     regChange(cm);
   }, true);
+  option("lineSeparator", null, function(cm, val) {
+    cm.doc.lineSep = val;
+    if (!val) return;
+    var newBreaks = [], lineNo = cm.doc.first;
+    cm.doc.iter(function(line) {
+      for (var pos = 0;;) {
+        var found = line.text.indexOf(val, pos);
+        if (found == -1) break;
+        pos = found + val.length;
+        newBreaks.push(Pos(lineNo, found));
+      }
+      lineNo++;
+    });
+    for (var i = newBreaks.length - 1; i >= 0; i--)
+      replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length))
+  });
   option("specialChars", /[\t\u0000-\u0019\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val, old) {
     cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
     if (old != CodeMirror.Init) cm.refresh();
@@ -5333,11 +5455,12 @@
       cm.display.disabled = true;
     } else {
       cm.display.disabled = false;
-      if (!val) cm.display.input.reset();
     }
+    cm.display.input.readOnlyChanged(val)
   });
   option("disableInput", false, function(cm, val) {if (!val) cm.display.input.reset();}, true);
   option("dragDrop", true, dragDropChanged);
+  option("allowDropFileTypes", null);
 
   option("cursorBlinkRate", 530);
   option("cursorScrollMargin", 0);
@@ -5625,7 +5748,8 @@
             } else if (cur.line > cm.doc.first) {
               var prev = getLine(cm.doc, cur.line - 1).text;
               if (prev)
-                cm.replaceRange(line.charAt(0) + "\n" + prev.charAt(prev.length - 1),
+                cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                                prev.charAt(prev.length - 1),
                                 Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose");
             }
           }
@@ -5639,10 +5763,10 @@
         var len = cm.listSelections().length;
         for (var i = 0; i < len; i++) {
           var range = cm.listSelections()[i];
-          cm.replaceRange("\n", range.anchor, range.head, "+input");
+          cm.replaceRange(cm.doc.lineSeparator(), range.anchor, range.head, "+input");
           cm.indentLine(range.from().line + 1, null, true);
-          ensureCursorVisible(cm);
         }
+        ensureCursorVisible(cm);
       });
     },
     toggleOverwrite: function(cm) {cm.toggleOverwrite();}
@@ -6570,7 +6694,7 @@
         parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;";
       removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
     }
-    return widget.height = widget.node.offsetHeight;
+    return widget.height = widget.node.parentNode.offsetHeight;
   }
 
   function addLineWidget(doc, handle, node, options) {
@@ -6759,7 +6883,9 @@
 
   function getLineStyles(cm, line, updateFrontier) {
     if (!line.styles || line.styles[0] != cm.state.modeGen) {
-      var result = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
+      var state = getStateBefore(cm, lineNo(line));
+      var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state);
+      line.stateAfter = state;
       line.styles = result.styles;
       if (result.classes) line.styleClasses = result.classes;
       else if (line.styleClasses) line.styleClasses = null;
@@ -6776,7 +6902,7 @@
     var stream = new StringStream(text, cm.options.tabSize);
     stream.start = stream.pos = startAt || 0;
     if (text == "") callBlankLine(mode, state);
-    while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
+    while (!stream.eol()) {
       readToken(mode, stream, state);
       stream.start = stream.pos;
     }
@@ -6803,7 +6929,7 @@
     // is needed on Webkit to be able to get line-level bounding
     // rectangles for it (in measureChar).
     var content = elt("span", null, null, webkit ? "padding-right: .1px" : null);
-    var builder = {pre: elt("pre", [content]), content: content,
+    var builder = {pre: elt("pre", [content], "CodeMirror-line"), content: content,
                    col: 0, pos: 0, cm: cm,
                    splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")};
     lineView.measure = {};
@@ -6893,6 +7019,10 @@
           txt.setAttribute("role", "presentation");
           txt.setAttribute("cm-text", "\t");
           builder.col += tabWidth;
+        } else if (m[0] == "\r" || m[0] == "\n") {
+          var txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
+          txt.setAttribute("cm-text", m[0]);
+          builder.col += 1;
         } else {
           var txt = builder.cm.options.specialCharPlaceholder(m[0]);
           txt.setAttribute("cm-text", m[0]);
@@ -6974,7 +7104,7 @@
       if (nextChange == pos) { // Update current marker set
         spanStyle = spanEndStyle = spanStartStyle = title = css = "";
         collapsed = null; nextChange = Infinity;
-        var foundBookmarks = [];
+        var foundBookmarks = [], endStyles
         for (var j = 0; j < spans.length; ++j) {
           var sp = spans[j], m = sp.marker;
           if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
@@ -6985,9 +7115,9 @@
               spanEndStyle = "";
             }
             if (m.className) spanStyle += " " + m.className;
-            if (m.css) css = m.css;
+            if (m.css) css = (css ? css + ";" : "") + m.css;
             if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
-            if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
+            if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to)
             if (m.title && !title) title = m.title;
             if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
               collapsed = sp;
@@ -6995,14 +7125,17 @@
             nextChange = sp.from;
           }
         }
+        if (endStyles) for (var j = 0; j < endStyles.length; j += 2)
+          if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j]
+
+        if (!collapsed || collapsed.from == pos) for (var j = 0; j < foundBookmarks.length; ++j)
+          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
         if (collapsed && (collapsed.from || 0) == pos) {
           buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
                              collapsed.marker, collapsed.from == null);
           if (collapsed.to == null) return;
           if (collapsed.to == pos) collapsed = false;
         }
-        if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookmarks.length; ++j)
-          buildCollapsedSpan(builder, 0, foundBookmarks[j]);
       }
       if (pos >= len) break;
 
@@ -7238,8 +7371,8 @@
   };
 
   var nextDocId = 0;
-  var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
-    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
+  var Doc = CodeMirror.Doc = function(text, mode, firstLine, lineSep) {
+    if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep);
     if (firstLine == null) firstLine = 0;
 
     BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
@@ -7253,8 +7386,10 @@
     this.history = new History(null);
     this.id = ++nextDocId;
     this.modeOption = mode;
+    this.lineSep = lineSep;
+    this.extend = false;
 
-    if (typeof text == "string") text = splitLines(text);
+    if (typeof text == "string") text = this.splitLines(text);
     updateDoc(this, {from: start, to: start, text: text});
     setSelection(this, simpleSelection(start), sel_dontScroll);
   };
@@ -7284,12 +7419,12 @@
     getValue: function(lineSep) {
       var lines = getLines(this, this.first, this.first + this.size);
       if (lineSep === false) return lines;
-      return lines.join(lineSep || "\n");
+      return lines.join(lineSep || this.lineSeparator());
     },
     setValue: docMethodOp(function(code) {
       var top = Pos(this.first, 0), last = this.first + this.size - 1;
       makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
-                        text: splitLines(code), origin: "setValue", full: true}, true);
+                        text: this.splitLines(code), origin: "setValue", full: true}, true);
       setSelection(this, simpleSelection(top));
     }),
     replaceRange: function(code, from, to, origin) {
@@ -7300,7 +7435,7 @@
     getRange: function(from, to, lineSep) {
       var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
       if (lineSep === false) return lines;
-      return lines.join(lineSep || "\n");
+      return lines.join(lineSep || this.lineSeparator());
     },
 
     getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
@@ -7340,10 +7475,11 @@
       extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
     }),
     extendSelections: docMethodOp(function(heads, options) {
-      extendSelections(this, clipPosArray(this, heads, options));
+      extendSelections(this, clipPosArray(this, heads), options);
     }),
     extendSelectionsBy: docMethodOp(function(f, options) {
-      extendSelections(this, map(this.sel.ranges, f), options);
+      var heads = map(this.sel.ranges, f);
+      extendSelections(this, clipPosArray(this, heads), options);
     }),
     setSelections: docMethodOp(function(ranges, primary, options) {
       if (!ranges.length) return;
@@ -7366,13 +7502,13 @@
         lines = lines ? lines.concat(sel) : sel;
       }
       if (lineSep === false) return lines;
-      else return lines.join(lineSep || "\n");
+      else return lines.join(lineSep || this.lineSeparator());
     },
     getSelections: function(lineSep) {
       var parts = [], ranges = this.sel.ranges;
       for (var i = 0; i < ranges.length; i++) {
         var sel = getBetween(this, ranges[i].from(), ranges[i].to());
-        if (lineSep !== false) sel = sel.join(lineSep || "\n");
+        if (lineSep !== false) sel = sel.join(lineSep || this.lineSeparator());
         parts[i] = sel;
       }
       return parts;
@@ -7387,7 +7523,7 @@
       var changes = [], sel = this.sel;
       for (var i = 0; i < sel.ranges.length; i++) {
         var range = sel.ranges[i];
-        changes[i] = {from: range.from(), to: range.to(), text: splitLines(code[i]), origin: origin};
+        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
       }
       var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
       for (var i = changes.length - 1; i >= 0; i--)
@@ -7468,7 +7604,7 @@
     removeLineWidget: function(widget) { widget.clear(); },
 
     markText: function(from, to, options) {
-      return markText(this, clipPos(this, from), clipPos(this, to), options, "range");
+      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range");
     },
     setBookmark: function(pos, options) {
       var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
@@ -7537,7 +7673,8 @@
     },
 
     copy: function(copyHistory) {
-      var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first);
+      var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                        this.modeOption, this.first, this.lineSep);
       doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
       doc.sel = this.sel;
       doc.extend = false;
@@ -7553,7 +7690,7 @@
       var from = this.first, to = this.first + this.size;
       if (options.from != null && options.from > from) from = options.from;
       if (options.to != null && options.to < to) to = options.to;
-      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from);
+      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep);
       if (options.sharedHist) copy.history = this.history;
       (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
       copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
@@ -7582,7 +7719,13 @@
     iterLinkedDocs: function(f) {linkedDocs(this, f);},
 
     getMode: function() {return this.mode;},
-    getEditor: function() {return this.cm;}
+    getEditor: function() {return this.cm;},
+
+    splitLines: function(str) {
+      if (this.lineSep) return str.split(this.lineSep);
+      return splitLinesAuto(str);
+    },
+    lineSeparator: function() { return this.lineSep || "\n"; }
   });
 
   // Public alias.
@@ -8023,24 +8166,30 @@
     }
   };
 
+  var noHandlers = []
+  function getHandlers(emitter, type, copy) {
+    var arr = emitter._handlers && emitter._handlers[type]
+    if (copy) return arr && arr.length > 0 ? arr.slice() : noHandlers
+    else return arr || noHandlers
+  }
+
   var off = CodeMirror.off = function(emitter, type, f) {
     if (emitter.removeEventListener)
       emitter.removeEventListener(type, f, false);
     else if (emitter.detachEvent)
       emitter.detachEvent("on" + type, f);
     else {
-      var arr = emitter._handlers && emitter._handlers[type];
-      if (!arr) return;
-      for (var i = 0; i < arr.length; ++i)
-        if (arr[i] == f) { arr.splice(i, 1); break; }
+      var handlers = getHandlers(emitter, type, false)
+      for (var i = 0; i < handlers.length; ++i)
+        if (handlers[i] == f) { handlers.splice(i, 1); break; }
     }
   };
 
   var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
-    var arr = emitter._handlers && emitter._handlers[type];
-    if (!arr) return;
+    var handlers = getHandlers(emitter, type, true)
+    if (!handlers.length) return;
     var args = Array.prototype.slice.call(arguments, 2);
-    for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
+    for (var i = 0; i < handlers.length; ++i) handlers[i].apply(null, args);
   };
 
   var orphanDelayedCallbacks = null;
@@ -8053,8 +8202,8 @@
   // them to be executed when the last operation ends, or, if no
   // operation is active, when a timeout fires.
   function signalLater(emitter, type /*, values...*/) {
-    var arr = emitter._handlers && emitter._handlers[type];
-    if (!arr) return;
+    var arr = getHandlers(emitter, type, false)
+    if (!arr.length) return;
     var args = Array.prototype.slice.call(arguments, 2), list;
     if (operationGroup) {
       list = operationGroup.delayedCallbacks;
@@ -8094,8 +8243,7 @@
   }
 
   function hasHandler(emitter, type) {
-    var arr = emitter._handlers && emitter._handlers[type];
-    return arr && arr.length > 0;
+    return getHandlers(emitter, type).length > 0
   }
 
   // Add on and off methods to a constructor's prototype, to make
@@ -8142,7 +8290,7 @@
 
   // The inverse of countColumn -- find the offset that corresponds to
   // a particular column.
-  function findColumn(string, goal, tabSize) {
+  var findColumn = CodeMirror.findColumn = function(string, goal, tabSize) {
     for (var pos = 0, col = 0;;) {
       var nextTab = string.indexOf("\t", pos);
       if (nextTab == -1) nextTab = string.length;
@@ -8282,7 +8430,12 @@
     } while (child = child.parentNode);
   };
 
-  function activeElt() { return document.activeElement; }
+  function activeElt() {
+    var activeElement = document.activeElement;
+    while (activeElement && activeElement.root && activeElement.root.activeElement)
+      activeElement = activeElement.root.activeElement;
+    return activeElement;
+  }
   // Older versions of IE throws unspecified error when touching
   // document.activeElement in some cases (during loading, in iframe)
   if (ie && ie_version < 11) activeElt = function() {
@@ -8384,7 +8537,7 @@
 
   // See if "".split is the broken IE version, if so, provide an
   // alternative way to split lines.
-  var splitLines = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
+  var splitLinesAuto = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
     var pos = 0, result = [], l = string.length;
     while (pos <= l) {
       var nl = string.indexOf("\n", pos);
@@ -8430,14 +8583,16 @@
 
   // KEY NAMES
 
-  var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
-                  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
-                  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
-                  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod", 107: "=", 109: "-", 127: "Delete",
-                  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
-                  221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
-                  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"};
-  CodeMirror.keyNames = keyNames;
+  var keyNames = CodeMirror.keyNames = {
+    3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
+    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+    221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+  };
   (function() {
     // Number keys
     for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
@@ -8742,7 +8897,7 @@
 
   // THE END
 
-  CodeMirror.version = "5.4.0";
+  CodeMirror.version = "5.10.1";
 
   return CodeMirror;
 });