Deleted a specific code for ie8 - document.selection (#9298)

src/renderers/dom/shared/ReactDOMSelection.js

@@ -11,8 +11,6 @@
 
 'use strict';
 
-var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');
-
 var getNodeForCharacterOffset = require('getNodeForCharacterOffset');
 var getTextContentAccessor = require('getTextContentAccessor');
 
@@ -25,39 +23,6 @@ function isCollapsed(anchorNode, anchorOffset, focusNode, focusOffset) {
   return anchorNode === focusNode && anchorOffset === focusOffset;
 }
 
-/**
- * Get the appropriate anchor and focus node/offset pairs for IE.
- *
- * The catch here is that IE's selection API doesn't provide information
- * about whether the selection is forward or backward, so we have to
- * behave as though it's always forward.
- *
- * IE text differs from modern selection in that it behaves as though
- * block elements end with a new line. This means character offsets will
- * differ between the two APIs.
- *
- * @param {DOMElement} node
- * @return {object}
- */
-function getIEOffsets(node) {
-  var selection = document.selection;
-  var selectedRange = selection.createRange();
-  var selectedLength = selectedRange.text.length;
-
-  // Duplicate selection so we can move range without breaking user selection.
-  var fromStart = selectedRange.duplicate();
-  fromStart.moveToElementText(node);
-  fromStart.setEndPoint('EndToStart', selectedRange);
-
-  var startOffset = fromStart.text.length;
-  var endOffset = startOffset + selectedLength;
-
-  return {
-    start: startOffset,
-    end: endOffset,
-  };
-}
-
 /**
  * @param {DOMElement} node
  * @return {?object}
@@ -130,32 +95,6 @@ function getModernOffsets(node) {
   };
 }
 
-/**
- * @param {DOMElement|DOMTextNode} node
- * @param {object} offsets
- */
-function setIEOffsets(node, offsets) {
-  var range = document.selection.createRange().duplicate();
-  var start, end;
-
-  if (offsets.end === undefined) {
-    start = offsets.start;
-    end = start;
-  } else if (offsets.start > offsets.end) {
-    start = offsets.end;
-    end = offsets.start;
-  } else {
-    start = offsets.start;
-    end = offsets.end;
-  }
-
-  range.moveToElementText(node);
-  range.moveStart('character', start);
-  range.setEndPoint('EndToStart', range);
-  range.moveEnd('character', end - start);
-  range.select();
-}
-
 /**
  * In modern non-IE browsers, we can support both forward and backward
  * selections.
@@ -204,21 +143,17 @@ function setModernOffsets(node, offsets) {
   }
 }
 
-var useIEOffsets = ExecutionEnvironment.canUseDOM &&
-  'selection' in document &&
-  !('getSelection' in window);
-
 var ReactDOMSelection = {
   /**
    * @param {DOMElement} node
    */
-  getOffsets: useIEOffsets ? getIEOffsets : getModernOffsets,
+  getOffsets: getModernOffsets,
 
   /**
    * @param {DOMElement|DOMTextNode} node
    * @param {object} offsets
    */
-  setOffsets: useIEOffsets ? setIEOffsets : setModernOffsets,
+  setOffsets: setModernOffsets,
 };
 
 module.exports = ReactDOMSelection;

src/renderers/dom/shared/ReactInputSelection.js

@@ -98,20 +98,6 @@ var ReactInputSelection = {
         start: input.selectionStart,
         end: input.selectionEnd,
       };
-    } else if (
-      document.selection &&
-      (input.nodeName && input.nodeName.toLowerCase() === 'input')
-    ) {
-      // IE8 input.
-      var range = document.selection.createRange();
-      // There can only be one selection per document in IE, so it must
-      // be in our element.
-      if (range.parentElement() === input) {
-        selection = {
-          start: -range.moveStart('character', -input.value.length),
-          end: -range.moveEnd('character', -input.value.length),
-        };
-      }
     } else {
       // Content editable or old IE textarea.
       selection = ReactDOMSelection.getOffsets(input);
@@ -136,15 +122,6 @@ var ReactInputSelection = {
     if ('selectionStart' in input) {
       input.selectionStart = start;
       input.selectionEnd = Math.min(end, input.value.length);
-    } else if (
-      document.selection &&
-      (input.nodeName && input.nodeName.toLowerCase() === 'input')
-    ) {
-      var range = input.createTextRange();
-      range.collapse(true);
-      range.moveStart('character', start);
-      range.moveEnd('character', end - start);
-      range.select();
     } else {
       ReactDOMSelection.setOffsets(input, offsets);
     }

src/renderers/dom/shared/eventPlugins/SelectEventPlugin.js

@@ -80,14 +80,6 @@ function getSelection(node) {
       focusNode: selection.focusNode,
       focusOffset: selection.focusOffset,
     };
-  } else if (document.selection) {
-    var range = document.selection.createRange();
-    return {
-      parentElement: range.parentElement(),
-      text: range.text,
-      top: range.boundingTop,
-      left: range.boundingLeft,
-    };
   }
 }