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File: public/js/tinymce/src/core/src/main/js/keyboard/BoundaryLocation.js

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File: public/js/tinymce/src/core/src/main/js/keyboard/BoundaryLocation.js
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/** * BoundaryLocation.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.keyboard.BoundaryLocation', [ 'ephox.katamari.api.Adt', 'ephox.katamari.api.Fun', 'ephox.katamari.api.Option', 'ephox.katamari.api.Options', 'tinymce.core.caret.CaretFinder', 'tinymce.core.caret.CaretUtils', 'tinymce.core.fmt.CaretFormat', 'tinymce.core.keyboard.InlineUtils', 'tinymce.core.util.LazyEvaluator' ], function (Adt, Fun, Option, Options, CaretFinder, CaretUtils, CaretFormat, InlineUtils, LazyEvaluator) { var Location = Adt.generate([ { before: [ 'element' ] }, { start: [ 'element' ] }, { end: [ 'element' ] }, { after: [ 'element' ] } ]); var rescope = function (rootNode, node) { var parentBlock = CaretUtils.getParentBlock(node, rootNode); return parentBlock ? parentBlock : rootNode; }; var before = function (isInlineTarget, rootNode, pos) { var nPos = InlineUtils.normalizeForwards(pos); var scope = rescope(rootNode, nPos.container()); return InlineUtils.findRootInline(isInlineTarget, scope, nPos).fold( function () { return CaretFinder.nextPosition(scope, nPos) .bind(Fun.curry(InlineUtils.findRootInline, isInlineTarget, scope)) .map(function (inline) { return Location.before(inline); }); }, Option.none ); }; var isNotInsideFormatCaretContainer = function (rootNode, elm) { return CaretFormat.getParentCaretContainer(rootNode, elm) === null; }; var findInsideRootInline = function (isInlineTarget, rootNode, pos) { return InlineUtils.findRootInline(isInlineTarget, rootNode, pos).filter(Fun.curry(isNotInsideFormatCaretContainer, rootNode)); }; var start = function (isInlineTarget, rootNode, pos) { var nPos = InlineUtils.normalizeBackwards(pos); return findInsideRootInline(isInlineTarget, rootNode, nPos).bind(function (inline) { var prevPos = CaretFinder.prevPosition(inline, nPos); return prevPos.isNone() ? Option.some(Location.start(inline)) : Option.none(); }); }; var end = function (isInlineTarget, rootNode, pos) { var nPos = InlineUtils.normalizeForwards(pos); return findInsideRootInline(isInlineTarget, rootNode, nPos).bind(function (inline) { var nextPos = CaretFinder.nextPosition(inline, nPos); return nextPos.isNone() ? Option.some(Location.end(inline)) : Option.none(); }); }; var after = function (isInlineTarget, rootNode, pos) { var nPos = InlineUtils.normalizeBackwards(pos); var scope = rescope(rootNode, nPos.container()); return InlineUtils.findRootInline(isInlineTarget, scope, nPos).fold( function () { return CaretFinder.prevPosition(scope, nPos) .bind(Fun.curry(InlineUtils.findRootInline, isInlineTarget, scope)) .map(function (inline) { return Location.after(inline); }); }, Option.none ); }; var isValidLocation = function (location) { return InlineUtils.isRtl(getElement(location)) === false; }; var readLocation = function (isInlineTarget, rootNode, pos) { var location = LazyEvaluator.evaluateUntil([ before, start, end, after ], [isInlineTarget, rootNode, pos]); return location.filter(isValidLocation); }; var getElement = function (location) { return location.fold( Fun.identity, // Before Fun.identity, // Start Fun.identity, // End Fun.identity // After ); }; var getName = function (location) { return location.fold( Fun.constant('before'), // Before Fun.constant('start'), // Start Fun.constant('end'), // End Fun.constant('after') // After ); }; var outside = function (location) { return location.fold( Location.before, // Before Location.before, // Start Location.after, // End Location.after // After ); }; var inside = function (location) { return location.fold( Location.start, // Before Location.start, // Start Location.end, // End Location.end // After ); }; var isEq = function (location1, location2) { return getName(location1) === getName(location2) && getElement(location1) === getElement(location2); }; var betweenInlines = function (forward, isInlineTarget, rootNode, from, to, location) { return Options.liftN([ InlineUtils.findRootInline(isInlineTarget, rootNode, from), InlineUtils.findRootInline(isInlineTarget, rootNode, to) ], function (fromInline, toInline) { if (fromInline !== toInline && InlineUtils.hasSameParentBlock(rootNode, fromInline, toInline)) { // Force after since some browsers normalize and lean left into the closest inline return Location.after(forward ? fromInline : toInline); } else { return location; } }).getOr(location); }; var skipNoMovement = function (fromLocation, toLocation) { return fromLocation.fold( Fun.constant(true), function (fromLocation) { return !isEq(fromLocation, toLocation); } ); }; var findLocationTraverse = function (forward, isInlineTarget, rootNode, fromLocation, pos) { var from = InlineUtils.normalizePosition(forward, pos); var to = CaretFinder.fromPosition(forward, rootNode, from).map(Fun.curry(InlineUtils.normalizePosition, forward)); var location = to.fold( function () { return fromLocation.map(outside); }, function (to) { return readLocation(isInlineTarget, rootNode, to) .map(Fun.curry(betweenInlines, forward, isInlineTarget, rootNode, from, to)) .filter(Fun.curry(skipNoMovement, fromLocation)); } ); return location.filter(isValidLocation); }; var findLocationSimple = function (forward, location) { if (forward) { return location.fold( Fun.compose(Option.some, Location.start), // Before -> Start Option.none, Fun.compose(Option.some, Location.after), // End -> After Option.none ); } else { return location.fold( Option.none, Fun.compose(Option.some, Location.before), // Before <- Start Option.none, Fun.compose(Option.some, Location.end) // End <- After ); } }; var findLocation = function (forward, isInlineTarget, rootNode, pos) { var from = InlineUtils.normalizePosition(forward, pos); var fromLocation = readLocation(isInlineTarget, rootNode, from); return readLocation(isInlineTarget, rootNode, from).bind(Fun.curry(findLocationSimple, forward)).orThunk(function () { return findLocationTraverse(forward, isInlineTarget, rootNode, fromLocation, pos); }); }; return { readLocation: readLocation, findLocation: findLocation, prevLocation: Fun.curry(findLocation, false), nextLocation: Fun.curry(findLocation, true), getElement: getElement, outside: outside, inside: inside }; } );