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File: public/js/tinymce/src/core/src/main/js/delete/BlockBoundary.js

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File: public/js/tinymce/src/core/src/main/js/delete/BlockBoundary.js
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/** * BlockBoundary.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 */ define( 'tinymce.core.delete.BlockBoundary', [ 'ephox.katamari.api.Arr', 'ephox.katamari.api.Fun', 'ephox.katamari.api.Option', 'ephox.katamari.api.Options', 'ephox.katamari.api.Struct', 'ephox.sugar.api.dom.Compare', 'ephox.sugar.api.node.Element', 'ephox.sugar.api.node.Node', 'ephox.sugar.api.search.PredicateFind', 'ephox.sugar.api.search.Traverse', 'tinymce.core.caret.CaretFinder', 'tinymce.core.caret.CaretPosition', 'tinymce.core.delete.DeleteUtils', 'tinymce.core.dom.Empty', 'tinymce.core.dom.NodeType' ], function (Arr, Fun, Option, Options, Struct, Compare, Element, Node, PredicateFind, Traverse, CaretFinder, CaretPosition, DeleteUtils, Empty, NodeType) { var BlockPosition = Struct.immutable('block', 'position'); var BlockBoundary = Struct.immutable('from', 'to'); var getBlockPosition = function (rootNode, pos) { var rootElm = Element.fromDom(rootNode); var containerElm = Element.fromDom(pos.container()); return DeleteUtils.getParentBlock(rootElm, containerElm).map(function (block) { return BlockPosition(block, pos); }); }; var isDifferentBlocks = function (blockBoundary) { return Compare.eq(blockBoundary.from().block(), blockBoundary.to().block()) === false; }; var hasSameParent = function (blockBoundary) { return Traverse.parent(blockBoundary.from().block()).bind(function (parent1) { return Traverse.parent(blockBoundary.to().block()).filter(function (parent2) { return Compare.eq(parent1, parent2); }); }).isSome(); }; var isEditable = function (blockBoundary) { return NodeType.isContentEditableFalse(blockBoundary.from().block()) === false && NodeType.isContentEditableFalse(blockBoundary.to().block()) === false; }; var skipLastBr = function (rootNode, forward, blockPosition) { if (NodeType.isBr(blockPosition.position().getNode()) && Empty.isEmpty(blockPosition.block()) === false) { return CaretFinder.positionIn(false, blockPosition.block().dom()).bind(function (lastPositionInBlock) { if (lastPositionInBlock.isEqual(blockPosition.position())) { return CaretFinder.fromPosition(forward, rootNode, lastPositionInBlock).bind(function (to) { return getBlockPosition(rootNode, to); }); } else { return Option.some(blockPosition); } }).getOr(blockPosition); } else { return blockPosition; } }; var readFromRange = function (rootNode, forward, rng) { var fromBlockPos = getBlockPosition(rootNode, CaretPosition.fromRangeStart(rng)); var toBlockPos = fromBlockPos.bind(function (blockPos) { return CaretFinder.fromPosition(forward, rootNode, blockPos.position()).bind(function (to) { return getBlockPosition(rootNode, to).map(function (blockPos) { return skipLastBr(rootNode, forward, blockPos); }); }); }); return Options.liftN([fromBlockPos, toBlockPos], BlockBoundary).filter(function (blockBoundary) { return isDifferentBlocks(blockBoundary) && hasSameParent(blockBoundary) && isEditable(blockBoundary); }); }; var read = function (rootNode, forward, rng) { return rng.collapsed ? readFromRange(rootNode, forward, rng) : Option.none(); }; return { read: read }; } );