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File: public/js/tinymce/src/core/src/main/js/caret/CaretUtils.js

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File: public/js/tinymce/src/core/src/main/js/caret/CaretUtils.js
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/** * CaretUtils.js * * Released under LGPL License. * Copyright (c) 1999-2017 Ephox Corp. All rights reserved * * License: http://www.tinymce.com/license * Contributing: http://www.tinymce.com/contributing */ /** * Utility functions shared by the caret logic. * * @private * @class tinymce.caret.CaretUtils */ define( 'tinymce.core.caret.CaretUtils', [ "tinymce.core.util.Fun", "tinymce.core.dom.TreeWalker", "tinymce.core.dom.NodeType", "tinymce.core.caret.CaretPosition", "tinymce.core.caret.CaretContainer", "tinymce.core.caret.CaretCandidate" ], function (Fun, TreeWalker, NodeType, CaretPosition, CaretContainer, CaretCandidate) { var isContentEditableTrue = NodeType.isContentEditableTrue, isContentEditableFalse = NodeType.isContentEditableFalse, isBlockLike = NodeType.matchStyleValues('display', 'block table table-cell table-caption list-item'), isCaretContainer = CaretContainer.isCaretContainer, isCaretContainerBlock = CaretContainer.isCaretContainerBlock, curry = Fun.curry, isElement = NodeType.isElement, isCaretCandidate = CaretCandidate.isCaretCandidate; var isForwards = function (direction) { return direction > 0; }; var isBackwards = function (direction) { return direction < 0; }; var skipCaretContainers = function (walk, shallow) { var node; while ((node = walk(shallow))) { if (!isCaretContainerBlock(node)) { return node; } } return null; }; var findNode = function (node, direction, predicateFn, rootNode, shallow) { var walker = new TreeWalker(node, rootNode); if (isBackwards(direction)) { if (isContentEditableFalse(node) || isCaretContainerBlock(node)) { node = skipCaretContainers(walker.prev, true); if (predicateFn(node)) { return node; } } while ((node = skipCaretContainers(walker.prev, shallow))) { if (predicateFn(node)) { return node; } } } if (isForwards(direction)) { if (isContentEditableFalse(node) || isCaretContainerBlock(node)) { node = skipCaretContainers(walker.next, true); if (predicateFn(node)) { return node; } } while ((node = skipCaretContainers(walker.next, shallow))) { if (predicateFn(node)) { return node; } } } return null; }; var getEditingHost = function (node, rootNode) { for (node = node.parentNode; node && node != rootNode; node = node.parentNode) { if (isContentEditableTrue(node)) { return node; } } return rootNode; }; var getParentBlock = function (node, rootNode) { while (node && node != rootNode) { if (isBlockLike(node)) { return node; } node = node.parentNode; } return null; }; var isInSameBlock = function (caretPosition1, caretPosition2, rootNode) { return getParentBlock(caretPosition1.container(), rootNode) == getParentBlock(caretPosition2.container(), rootNode); }; var isInSameEditingHost = function (caretPosition1, caretPosition2, rootNode) { return getEditingHost(caretPosition1.container(), rootNode) == getEditingHost(caretPosition2.container(), rootNode); }; var getChildNodeAtRelativeOffset = function (relativeOffset, caretPosition) { var container, offset; if (!caretPosition) { return null; } container = caretPosition.container(); offset = caretPosition.offset(); if (!isElement(container)) { return null; } return container.childNodes[offset + relativeOffset]; }; var beforeAfter = function (before, node) { var range = node.ownerDocument.createRange(); if (before) { range.setStartBefore(node); range.setEndBefore(node); } else { range.setStartAfter(node); range.setEndAfter(node); } return range; }; var isNodesInSameBlock = function (rootNode, node1, node2) { return getParentBlock(node1, rootNode) == getParentBlock(node2, rootNode); }; var lean = function (left, rootNode, node) { var sibling, siblingName; if (left) { siblingName = 'previousSibling'; } else { siblingName = 'nextSibling'; } while (node && node != rootNode) { sibling = node[siblingName]; if (isCaretContainer(sibling)) { sibling = sibling[siblingName]; } if (isContentEditableFalse(sibling)) { if (isNodesInSameBlock(rootNode, sibling, node)) { return sibling; } break; } if (isCaretCandidate(sibling)) { break; } node = node.parentNode; } return null; }; var before = curry(beforeAfter, true); var after = curry(beforeAfter, false); var normalizeRange = function (direction, rootNode, range) { var node, container, offset, location; var leanLeft = curry(lean, true, rootNode); var leanRight = curry(lean, false, rootNode); container = range.startContainer; offset = range.startOffset; if (CaretContainer.isCaretContainerBlock(container)) { if (!isElement(container)) { container = container.parentNode; } location = container.getAttribute('data-mce-caret'); if (location == 'before') { node = container.nextSibling; if (isContentEditableFalse(node)) { return before(node); } } if (location == 'after') { node = container.previousSibling; if (isContentEditableFalse(node)) { return after(node); } } } if (!range.collapsed) { return range; } if (NodeType.isText(container)) { if (isCaretContainer(container)) { if (direction === 1) { node = leanRight(container); if (node) { return before(node); } node = leanLeft(container); if (node) { return after(node); } } if (direction === -1) { node = leanLeft(container); if (node) { return after(node); } node = leanRight(container); if (node) { return before(node); } } return range; } if (CaretContainer.endsWithCaretContainer(container) && offset >= container.data.length - 1) { if (direction === 1) { node = leanRight(container); if (node) { return before(node); } } return range; } if (CaretContainer.startsWithCaretContainer(container) && offset <= 1) { if (direction === -1) { node = leanLeft(container); if (node) { return after(node); } } return range; } if (offset === container.data.length) { node = leanRight(container); if (node) { return before(node); } return range; } if (offset === 0) { node = leanLeft(container); if (node) { return after(node); } return range; } } return range; }; var isNextToContentEditableFalse = function (relativeOffset, caretPosition) { return isContentEditableFalse(getChildNodeAtRelativeOffset(relativeOffset, caretPosition)); }; return { isForwards: isForwards, isBackwards: isBackwards, findNode: findNode, getEditingHost: getEditingHost, getParentBlock: getParentBlock, isInSameBlock: isInSameBlock, isInSameEditingHost: isInSameEditingHost, isBeforeContentEditableFalse: curry(isNextToContentEditableFalse, 0), isAfterContentEditableFalse: curry(isNextToContentEditableFalse, -1), normalizeRange: normalizeRange }; } );