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Diffstat (limited to 'node_modules/react-dom/lib/ReactDOMSelection.js')
| -rw-r--r-- | node_modules/react-dom/lib/ReactDOMSelection.js | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/node_modules/react-dom/lib/ReactDOMSelection.js b/node_modules/react-dom/lib/ReactDOMSelection.js deleted file mode 100644 index c2404ef09..000000000 --- a/node_modules/react-dom/lib/ReactDOMSelection.js +++ /dev/null @@ -1,211 +0,0 @@ -/** - * Copyright 2013-present, Facebook, Inc. - * All rights reserved. - * - * This source code is licensed under the BSD-style license found in the - * LICENSE file in the root directory of this source tree. An additional grant - * of patent rights can be found in the PATENTS file in the same directory. - * - */ - -'use strict'; - -var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment'); - -var getNodeForCharacterOffset = require('./getNodeForCharacterOffset'); -var getTextContentAccessor = require('./getTextContentAccessor'); - -/** - * While `isCollapsed` is available on the Selection object and `collapsed` - * is available on the Range object, IE11 sometimes gets them wrong. - * If the anchor/focus nodes and offsets are the same, the range is collapsed. - */ -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} - */ -function getModernOffsets(node) { - var selection = window.getSelection && window.getSelection(); - - if (!selection || selection.rangeCount === 0) { - return null; - } - - var anchorNode = selection.anchorNode; - var anchorOffset = selection.anchorOffset; - var focusNode = selection.focusNode; - var focusOffset = selection.focusOffset; - - var currentRange = selection.getRangeAt(0); - - // In Firefox, range.startContainer and range.endContainer can be "anonymous - // divs", e.g. the up/down buttons on an <input type="number">. Anonymous - // divs do not seem to expose properties, triggering a "Permission denied - // error" if any of its properties are accessed. The only seemingly possible - // way to avoid erroring is to access a property that typically works for - // non-anonymous divs and catch any error that may otherwise arise. See - // https://bugzilla.mozilla.org/show_bug.cgi?id=208427 - try { - /* eslint-disable no-unused-expressions */ - currentRange.startContainer.nodeType; - currentRange.endContainer.nodeType; - /* eslint-enable no-unused-expressions */ - } catch (e) { - return null; - } - - // If the node and offset values are the same, the selection is collapsed. - // `Selection.isCollapsed` is available natively, but IE sometimes gets - // this value wrong. - var isSelectionCollapsed = isCollapsed(selection.anchorNode, selection.anchorOffset, selection.focusNode, selection.focusOffset); - - var rangeLength = isSelectionCollapsed ? 0 : currentRange.toString().length; - - var tempRange = currentRange.cloneRange(); - tempRange.selectNodeContents(node); - tempRange.setEnd(currentRange.startContainer, currentRange.startOffset); - - var isTempRangeCollapsed = isCollapsed(tempRange.startContainer, tempRange.startOffset, tempRange.endContainer, tempRange.endOffset); - - var start = isTempRangeCollapsed ? 0 : tempRange.toString().length; - var end = start + rangeLength; - - // Detect whether the selection is backward. - var detectionRange = document.createRange(); - detectionRange.setStart(anchorNode, anchorOffset); - detectionRange.setEnd(focusNode, focusOffset); - var isBackward = detectionRange.collapsed; - - return { - start: isBackward ? end : start, - end: isBackward ? start : end - }; -} - -/** - * @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. - * - * Note: IE10+ supports the Selection object, but it does not support - * the `extend` method, which means that even in modern IE, it's not possible - * to programmatically create a backward selection. Thus, for all IE - * versions, we use the old IE API to create our selections. - * - * @param {DOMElement|DOMTextNode} node - * @param {object} offsets - */ -function setModernOffsets(node, offsets) { - if (!window.getSelection) { - return; - } - - var selection = window.getSelection(); - var length = node[getTextContentAccessor()].length; - var start = Math.min(offsets.start, length); - var end = offsets.end === undefined ? start : Math.min(offsets.end, length); - - // IE 11 uses modern selection, but doesn't support the extend method. - // Flip backward selections, so we can set with a single range. - if (!selection.extend && start > end) { - var temp = end; - end = start; - start = temp; - } - - var startMarker = getNodeForCharacterOffset(node, start); - var endMarker = getNodeForCharacterOffset(node, end); - - if (startMarker && endMarker) { - var range = document.createRange(); - range.setStart(startMarker.node, startMarker.offset); - selection.removeAllRanges(); - - if (start > end) { - selection.addRange(range); - selection.extend(endMarker.node, endMarker.offset); - } else { - range.setEnd(endMarker.node, endMarker.offset); - selection.addRange(range); - } - } -} - -var useIEOffsets = ExecutionEnvironment.canUseDOM && 'selection' in document && !('getSelection' in window); - -var ReactDOMSelection = { - /** - * @param {DOMElement} node - */ - getOffsets: useIEOffsets ? getIEOffsets : getModernOffsets, - - /** - * @param {DOMElement|DOMTextNode} node - * @param {object} offsets - */ - setOffsets: useIEOffsets ? setIEOffsets : setModernOffsets -}; - -module.exports = ReactDOMSelection;
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