/* *
 *
 *  (c) 2010-2020 Torstein Honsi
 *
 *  License: www.highcharts.com/license
 *
 *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
 *
 * */
'use strict';
import AST from '../HTML/AST.js';
import H from '../../Globals.js';
var doc = H.doc, SVG_NS = H.SVG_NS;
import U from '../../Utilities.js';
var attr = U.attr, isString = U.isString, objectEach = U.objectEach, pick = U.pick;
/* *
 *
 *  Class
 *
 * */
/**
 * SVG Text Builder
 * @private
 * @class
 * @name Highcharts.TextBuilder
 */
var TextBuilder = /** @class */ (function () {
    function TextBuilder(svgElement) {
        var textStyles = svgElement.styles;
        this.renderer = svgElement.renderer;
        this.svgElement = svgElement;
        this.width = svgElement.textWidth;
        this.textLineHeight = textStyles && textStyles.lineHeight;
        this.textOutline = textStyles && textStyles.textOutline;
        this.ellipsis = Boolean(textStyles && textStyles.textOverflow === 'ellipsis');
        this.noWrap = Boolean(textStyles && textStyles.whiteSpace === 'nowrap');
        this.fontSize = textStyles && textStyles.fontSize;
    }
    /**
     * Build an SVG representation of the pseudo HTML given in the object's
     * svgElement.
     *
     * @private
     *
     * @return {void}.
     */
    TextBuilder.prototype.buildSVG = function () {
        var wrapper = this.svgElement;
        var textNode = wrapper.element, renderer = wrapper.renderer, textStr = pick(wrapper.textStr, '').toString(), hasMarkup = textStr.indexOf('<') !== -1, childNodes = textNode.childNodes, textCache, i = childNodes.length, tempParent = this.width && !wrapper.added && renderer.box;
        var regexMatchBreaks = /<br.*?>/g;
        // The buildText code is quite heavy, so if we're not changing something
        // that affects the text, skip it (#6113).
        textCache = [
            textStr,
            this.ellipsis,
            this.noWrap,
            this.textLineHeight,
            this.textOutline,
            this.fontSize,
            this.width
        ].join(',');
        if (textCache === wrapper.textCache) {
            return;
        }
        wrapper.textCache = textCache;
        delete wrapper.actualWidth;
        // Remove old text
        while (i--) {
            textNode.removeChild(childNodes[i]);
        }
        // Simple strings, add text directly and return
        if (!hasMarkup &&
            !this.ellipsis &&
            !this.width &&
            (textStr.indexOf(' ') === -1 ||
                (this.noWrap && !regexMatchBreaks.test(textStr)))) {
            textNode.appendChild(doc.createTextNode(this.unescapeEntities(textStr)));
            // Complex strings, add more logic
        }
        else if (textStr !== '') {
            if (tempParent) {
                // attach it to the DOM to read offset width
                tempParent.appendChild(textNode);
            }
            // Step 1. Parse the markup safely and directly into a tree
            // structure.
            var ast = new AST(textStr);
            // Step 2. Do as many as we can of the modifications to the tree
            // structure before it is added to the DOM
            this.modifyTree(ast.nodes);
            ast.addToDOM(wrapper.element);
            // Step 3. Some modifications can't be done until the structure is
            // in the DOM, because we need to read computed metrics.
            this.modifyDOM();
            // Add title if an ellipsis was added
            if (this.ellipsis &&
                (textNode.textContent || '').indexOf('\u2026') !== -1) {
                wrapper.attr('title', this.unescapeEntities(wrapper.textStr || '', ['&lt;', '&gt;']) // #7179
                );
            }
            if (tempParent) {
                tempParent.removeChild(textNode);
            }
        }
        // Apply the text outline
        if (isString(this.textOutline) && wrapper.applyTextOutline) {
            wrapper.applyTextOutline(this.textOutline);
        }
    };
    /**
     * Modify the DOM of the generated SVG structure. This function only does
     * operations that cannot be done until the elements are attached to the
     * DOM, like doing layout based on rendered metrics of the added elements.
     *
     * @private
     *
     * @return {void}
     */
    TextBuilder.prototype.modifyDOM = function () {
        var _this = this;
        var wrapper = this.svgElement;
        var x = attr(wrapper.element, 'x');
        wrapper.firstLineMetrics = void 0;
        // Modify hard line breaks by applying the rendered line height
        [].forEach.call(wrapper.element.querySelectorAll('tspan.highcharts-br'), function (br, i) {
            if (br.nextSibling && br.previousSibling) { // #5261
                if (i === 0 && br.previousSibling.nodeType === 1) {
                    wrapper.firstLineMetrics = wrapper.renderer
                        .fontMetrics(void 0, br.previousSibling);
                }
                attr(br, {
                    // Since the break is inserted in front of the next
                    // line, we need to use the next sibling for the line
                    // height
                    dy: _this.getLineHeight(br.nextSibling),
                    x: x
                });
            }
        });
        // Constrain the line width, either by ellipsis or wrapping
        var width = this.width || 0;
        if (!width) {
            return;
        }
        // Insert soft line breaks into each text node
        var modifyTextNode = function (textNode, parentElement) {
            var text = textNode.textContent || '';
            var words = text
                .replace(/([^\^])-/g, '$1- ') // Split on hyphens
                // .trim()
                .split(' '); // #1273
            var hasWhiteSpace = !_this.noWrap && (words.length > 1 || wrapper.element.childNodes.length > 1);
            var dy = _this.getLineHeight(parentElement);
            var lineNo = 0;
            var startAt = wrapper.actualWidth;
            if (_this.ellipsis) {
                if (text) {
                    _this.truncate(textNode, text, void 0, 0, 
                    // Target width
                    Math.max(0, 
                    // Substract the font face to make room for the
                    // ellipsis itself
                    width - parseInt(_this.fontSize || 12, 10)), 
                    // Build the text to test for
                    function (text, currentIndex) {
                        return text.substring(0, currentIndex) + '\u2026';
                    });
                }
            }
            else if (hasWhiteSpace) {
                var lines = [];
                // Remove preceding siblings in order to make the text length
                // calculation correct in the truncate function
                var precedingSiblings = [];
                while (parentElement.firstChild &&
                    parentElement.firstChild !== textNode) {
                    precedingSiblings.push(parentElement.firstChild);
                    parentElement.removeChild(parentElement.firstChild);
                }
                while (words.length) {
                    // Apply the previous line
                    if (words.length && !_this.noWrap && lineNo > 0) {
                        lines.push(textNode.textContent || '');
                        textNode.textContent = words.join(' ')
                            .replace(/- /g, '-');
                    }
                    // For each line, truncate the remaining
                    // words into the line length.
                    _this.truncate(textNode, void 0, words, lineNo === 0 ? (startAt || 0) : 0, width, 
                    // Build the text to test for
                    function (t, currentIndex) {
                        return words
                            .slice(0, currentIndex)
                            .join(' ')
                            .replace(/- /g, '-');
                    });
                    startAt = wrapper.actualWidth;
                    lineNo++;
                }
                // Reinsert the preceding child nodes
                precedingSiblings.forEach(function (childNode) {
                    parentElement.insertBefore(childNode, textNode);
                });
                // Insert the previous lines before the original text node
                lines.forEach(function (line) {
                    // Insert the line
                    parentElement.insertBefore(doc.createTextNode(line), textNode);
                    // Insert a break
                    var br = doc.createElementNS(SVG_NS, 'tspan');
                    br.textContent = '\u200B'; // zero-width space
                    attr(br, { dy: dy, x: x });
                    parentElement.insertBefore(br, textNode);
                });
            }
        };
        // Recurse down the DOM tree and handle line breaks for each text node
        var modifyChildren = (function (node) {
            var childNodes = [].slice.call(node.childNodes);
            childNodes.forEach(function (childNode) {
                if (childNode.nodeType === Node.TEXT_NODE) {
                    modifyTextNode(childNode, node);
                }
                else {
                    // Reset word-wrap width readings after hard breaks
                    if (childNode.className.baseVal
                        .indexOf('highcharts-br') !== -1) {
                        wrapper.actualWidth = 0;
                    }
                    // Recurse down to child node
                    modifyChildren(childNode);
                }
            });
        });
        modifyChildren(wrapper.element);
    };
    /**
     * Get the rendered line height of a <text>, <tspan> or pure text node.
     *
     * @param {DOMElementType|Text} node The node to check for
     *
     * @return {number} The rendered line height
     */
    TextBuilder.prototype.getLineHeight = function (node) {
        var fontSizeStyle;
        // If the node is a text node, use its parent
        var element = node.nodeType === Node.TEXT_NODE ?
            node.parentElement :
            node;
        if (!this.renderer.styledMode) {
            fontSizeStyle =
                element && /(px|em)$/.test(element.style.fontSize) ?
                    element.style.fontSize :
                    (this.fontSize || this.renderer.style.fontSize || 12);
        }
        return this.textLineHeight ?
            parseInt(this.textLineHeight.toString(), 10) :
            this.renderer.fontMetrics(fontSizeStyle, element || this.svgElement.element).h;
    };
    /**
     * Transform a pseudo HTML AST node tree into an SVG structure. We do as
     * much heavy lifting as we can here, before doing the final processing in
     * the modifyDOM function. The original data is mutated.
     *
     * @private
     *
     * @param {ASTNode[]} nodes The AST nodes
     *
     * @return {void}
     */
    TextBuilder.prototype.modifyTree = function (nodes) {
        var _this = this;
        var modifyChild = function (node, i) {
            var tagName = node.tagName;
            var styledMode = _this.renderer.styledMode;
            var attributes = node.attributes || {};
            // Apply styling to text tags
            if (tagName === 'b' || tagName === 'strong') {
                if (styledMode) {
                    attributes['class'] = 'highcharts-strong'; // eslint-disable-line dot-notation
                }
                else {
                    attributes.style = 'font-weight:bold;' + (attributes.style || '');
                }
            }
            else if (tagName === 'i' || tagName === 'em') {
                if (styledMode) {
                    attributes['class'] = 'highcharts-emphasized'; // eslint-disable-line dot-notation
                }
                else {
                    attributes.style = 'font-style:italic;' + (attributes.style || '');
                }
            }
            // Modify attributes
            if (isString(attributes.style)) {
                attributes.style = attributes.style.replace(/(;| |^)color([ :])/, '$1fill$2');
            }
            if (tagName === 'br') {
                attributes['class'] = 'highcharts-br'; // eslint-disable-line dot-notation
                node.textContent = '\u200B'; // zero-width space
                // Trim whitespace off the beginning of new lines
                var nextNode = nodes[i + 1];
                if (nextNode && nextNode.textContent) {
                    nextNode.textContent =
                        nextNode.textContent.replace(/^ +/gm, '');
                }
            }
            if (tagName !== '#text' && tagName !== 'a') {
                node.tagName = 'tspan';
            }
            node.attributes = attributes;
            // Recurse
            if (node.children) {
                node.children
                    .filter(function (c) { return c.tagName !== '#text'; })
                    .forEach(modifyChild);
            }
        };
        nodes.forEach(modifyChild);
        // Remove empty spans from the beginning because SVG's getBBox doesn't
        // count empty lines. The use case is tooltip where the header is empty.
        while (nodes[0]) {
            if (nodes[0].tagName === 'tspan' && !nodes[0].children) {
                nodes.splice(0, 1);
            }
            else {
                break;
            }
        }
    };
    /*
     * Truncate the text node contents to a given length. Used when the css
     * width is set. If the `textOverflow` is `ellipsis`, the text is truncated
     * character by character to the given length. If not, the text is
     * word-wrapped line by line.
     */
    TextBuilder.prototype.truncate = function (textNode, text, words, startAt, width, getString) {
        var svgElement = this.svgElement;
        var renderer = svgElement.renderer, rotation = svgElement.rotation;
        // Cache the lengths to avoid checking the same twice
        var lengths = [];
        // Word wrap can not be truncated to shorter than one word, ellipsis
        // text can be completely blank.
        var minIndex = words ? 1 : 0;
        var maxIndex = (text || words || '').length;
        var currentIndex = maxIndex;
        var str;
        var actualWidth;
        var getSubStringLength = function (charEnd, concatenatedEnd) {
            // charEnd is used when finding the character-by-character
            // break for ellipsis, concatenatedEnd is used for word-by-word
            // break for word wrapping.
            var end = concatenatedEnd || charEnd;
            var parentNode = textNode.parentNode;
            if (parentNode && typeof lengths[end] === 'undefined') {
                // Modern browsers
                if (parentNode.getSubStringLength) {
                    // Fails with DOM exception on unit-tests/legend/members
                    // of unknown reason. Desired width is 0, text content
                    // is "5" and end is 1.
                    try {
                        lengths[end] = startAt +
                            parentNode.getSubStringLength(0, words ? end + 1 : end);
                    }
                    catch (e) {
                        '';
                    }
                    // Legacy
                }
                else if (renderer.getSpanWidth) { // #9058 jsdom
                    textNode.textContent = getString(text || words, charEnd);
                    lengths[end] = startAt +
                        renderer.getSpanWidth(svgElement, textNode);
                }
            }
            return lengths[end];
        };
        svgElement.rotation = 0; // discard rotation when computing box
        actualWidth = getSubStringLength(textNode.textContent.length);
        if (startAt + actualWidth > width) {
            // Do a binary search for the index where to truncate the text
            while (minIndex <= maxIndex) {
                currentIndex = Math.ceil((minIndex + maxIndex) / 2);
                // When checking words for word-wrap, we need to build the
                // string and measure the subStringLength at the concatenated
                // word length.
                if (words) {
                    str = getString(words, currentIndex);
                }
                actualWidth = getSubStringLength(currentIndex, str && str.length - 1);
                if (minIndex === maxIndex) {
                    // Complete
                    minIndex = maxIndex + 1;
                }
                else if (actualWidth > width) {
                    // Too large. Set max index to current.
                    maxIndex = currentIndex - 1;
                }
                else {
                    // Within width. Set min index to current.
                    minIndex = currentIndex;
                }
            }
            // If max index was 0 it means the shortest possible text was also
            // too large. For ellipsis that means only the ellipsis, while for
            // word wrap it means the whole first word.
            if (maxIndex === 0) {
                // Remove ellipsis
                textNode.textContent = '';
                // If the new text length is one less than the original, we don't
                // need the ellipsis
            }
            else if (!(text && maxIndex === text.length - 1)) {
                textNode.textContent = str || getString(text || words, currentIndex);
            }
        }
        // When doing line wrapping, prepare for the next line by removing the
        // items from this line.
        if (words) {
            words.splice(0, currentIndex);
        }
        svgElement.actualWidth = actualWidth;
        svgElement.rotation = rotation; // Apply rotation again.
    };
    /*
     * Un-escape HTML entities based on the public `renderer.escapes` list
     *
     * @private
     *
     * @param {string} inputStr The string to unescape
     * @param {Array<string>} [except] Exceptions
     *
     * @return {string} The processed string
     */
    TextBuilder.prototype.unescapeEntities = function (inputStr, except) {
        objectEach(this.renderer.escapes, function (value, key) {
            if (!except || except.indexOf(value) === -1) {
                inputStr = inputStr.toString().replace(new RegExp(value, 'g'), key);
            }
        });
        return inputStr;
    };
    return TextBuilder;
}());
export default TextBuilder;
