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

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File: public/js/tinymce/src/core/src/main/js/caret/LineWalker.js
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/** * LineWalker.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 */ /** * This module lets you walk the document line by line * returing nodes and client rects for each line. * * @private * @class tinymce.caret.LineWalker */ define( 'tinymce.core.caret.LineWalker', [ "tinymce.core.util.Fun", "tinymce.core.util.Arr", "tinymce.core.dom.Dimensions", "tinymce.core.caret.CaretCandidate", "tinymce.core.caret.CaretUtils", "tinymce.core.caret.CaretWalker", "tinymce.core.caret.CaretPosition", "tinymce.core.geom.ClientRect" ], function (Fun, Arr, Dimensions, CaretCandidate, CaretUtils, CaretWalker, CaretPosition, ClientRect) { var curry = Fun.curry; var findUntil = function (direction, rootNode, predicateFn, node) { while ((node = CaretUtils.findNode(node, direction, CaretCandidate.isEditableCaretCandidate, rootNode))) { if (predicateFn(node)) { return; } } }; var walkUntil = function (direction, isAboveFn, isBeflowFn, rootNode, predicateFn, caretPosition) { var line = 0, node, result = [], targetClientRect; var add = function (node) { var i, clientRect, clientRects; clientRects = Dimensions.getClientRects(node); if (direction == -1) { clientRects = clientRects.reverse(); } for (i = 0; i < clientRects.length; i++) { clientRect = clientRects[i]; if (isBeflowFn(clientRect, targetClientRect)) { continue; } if (result.length > 0 && isAboveFn(clientRect, Arr.last(result))) { line++; } clientRect.line = line; if (predicateFn(clientRect)) { return true; } result.push(clientRect); } }; targetClientRect = Arr.last(caretPosition.getClientRects()); if (!targetClientRect) { return result; } node = caretPosition.getNode(); add(node); findUntil(direction, rootNode, add, node); return result; }; var aboveLineNumber = function (lineNumber, clientRect) { return clientRect.line > lineNumber; }; var isLine = function (lineNumber, clientRect) { return clientRect.line === lineNumber; }; var upUntil = curry(walkUntil, -1, ClientRect.isAbove, ClientRect.isBelow); var downUntil = curry(walkUntil, 1, ClientRect.isBelow, ClientRect.isAbove); var positionsUntil = function (direction, rootNode, predicateFn, node) { var caretWalker = new CaretWalker(rootNode), walkFn, isBelowFn, isAboveFn, caretPosition, result = [], line = 0, clientRect, targetClientRect; var getClientRect = function (caretPosition) { if (direction == 1) { return Arr.last(caretPosition.getClientRects()); } return Arr.last(caretPosition.getClientRects()); }; if (direction == 1) { walkFn = caretWalker.next; isBelowFn = ClientRect.isBelow; isAboveFn = ClientRect.isAbove; caretPosition = CaretPosition.after(node); } else { walkFn = caretWalker.prev; isBelowFn = ClientRect.isAbove; isAboveFn = ClientRect.isBelow; caretPosition = CaretPosition.before(node); } targetClientRect = getClientRect(caretPosition); do { if (!caretPosition.isVisible()) { continue; } clientRect = getClientRect(caretPosition); if (isAboveFn(clientRect, targetClientRect)) { continue; } if (result.length > 0 && isBelowFn(clientRect, Arr.last(result))) { line++; } clientRect = ClientRect.clone(clientRect); clientRect.position = caretPosition; clientRect.line = line; if (predicateFn(clientRect)) { return result; } result.push(clientRect); } while ((caretPosition = walkFn(caretPosition))); return result; }; return { upUntil: upUntil, downUntil: downUntil, /** * Find client rects with line and caret position until the predicate returns true. * * @method positionsUntil * @param {Number} direction Direction forward/backward 1/-1. * @param {DOMNode} rootNode Root node to walk within. * @param {function} predicateFn Gets the client rect as it's input. * @param {DOMNode} node Node to start walking from. * @return {Array} Array of client rects with line and position properties. */ positionsUntil: positionsUntil, isAboveLine: curry(aboveLineNumber), isLine: curry(isLine) }; } );