'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var prettier = require('prettier');

// @see http://xahlee.info/js/html5_non-closing_tag.html
const selfClosingTags = [
    'area',
    'base',
    'br',
    'col',
    'embed',
    'hr',
    'img',
    'input',
    'link',
    'meta',
    'param',
    'source',
    'track',
    'wbr',
];
// https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements#Elements
const blockElements = [
    'address',
    'article',
    'aside',
    'blockquote',
    'details',
    'dialog',
    'dd',
    'div',
    'dl',
    'dt',
    'fieldset',
    'figcaption',
    'figure',
    'footer',
    'form',
    'h1',
    'h2',
    'h3',
    'h4',
    'h5',
    'h6',
    'header',
    'hgroup',
    'hr',
    'li',
    'main',
    'nav',
    'ol',
    'p',
    'pre',
    'section',
    'table',
    'ul',
];
/**
 * HTML attributes that we may safely reformat (trim whitespace, add or remove newlines)
 */
const formattableAttributes = [
// None at the moment
// Prettier HTML does not format attributes at all
// and to be consistent we leave this array empty for now
];

function extractAttributes(html) {
    const extractAttributesRegex = /<[a-z]+[\s\n]*([\s\S]*?)>/im;
    const attributeRegex = /([^\s=]+)(?:=(?:(?:("|')([\s\S]*?)\2)|(?:(\S+?)(?:\s|>|$))))?/gim;
    const [, attributesString] = html.match(extractAttributesRegex);
    const attrs = [];
    let match;
    while ((match = attributeRegex.exec(attributesString))) {
        const [all, name, quotes, valueQuoted, valueUnquoted] = match;
        const value = valueQuoted || valueUnquoted;
        const attrStart = match.index;
        let valueNode;
        if (!value) {
            valueNode = true;
        }
        else {
            let valueStart = attrStart + name.length;
            if (quotes) {
                valueStart += 2;
            }
            valueNode = [
                {
                    type: 'Text',
                    data: value,
                    start: valueStart,
                    end: valueStart + value.length,
                },
            ];
        }
        attrs.push({
            type: 'Attribute',
            name,
            value: valueNode,
            start: attrStart,
            end: attrStart + all.length,
        });
    }
    return attrs;
}

const snippedTagContentAttribute = '✂prettier:content✂';
function snipScriptAndStyleTagContent(source) {
    let scriptMatchSpans = getMatchIndexes('script');
    let styleMatchSpans = getMatchIndexes('style');
    return snipTagContent(snipTagContent(source, 'script', '{}', styleMatchSpans), 'style', '', scriptMatchSpans);
    function getMatchIndexes(tagName) {
        const regex = getRegexp(tagName);
        const indexes = [];
        let match = null;
        while ((match = regex.exec(source)) != null) {
            if (source.slice(match.index, match.index + 4) !== '<!--') {
                indexes.push([match.index, regex.lastIndex]);
            }
        }
        return indexes;
    }
    function snipTagContent(_source, tagName, placeholder, otherSpans) {
        const regex = getRegexp(tagName);
        let newScriptMatchSpans = scriptMatchSpans;
        let newStyleMatchSpans = styleMatchSpans;
        // Replace valid matches
        const newSource = _source.replace(regex, (match, attributes, content, index) => {
            if (match.startsWith('<!--') || withinOtherSpan(index)) {
                return match;
            }
            const encodedContent = Buffer.from(content).toString('base64');
            const newContent = `<${tagName}${attributes} ${snippedTagContentAttribute}="${encodedContent}">${placeholder}</${tagName}>`;
            // Adjust the spans because the source now has a different content length
            const lengthDiff = match.length - newContent.length;
            newScriptMatchSpans = adjustSpans(scriptMatchSpans, newScriptMatchSpans);
            newStyleMatchSpans = adjustSpans(styleMatchSpans, newStyleMatchSpans);
            function adjustSpans(oldSpans, newSpans) {
                return oldSpans.map((oldSpan, idx) => {
                    const newSpan = newSpans[idx];
                    // Do the check using the old spans because the replace function works
                    // on the old spans. Replace oldSpans with newSpans afterwards.
                    if (oldSpan[0] > index) {
                        // span is after the match -> adjust start and end
                        return [newSpan[0] - lengthDiff, newSpan[1] - lengthDiff];
                    }
                    else if (oldSpan[0] === index) {
                        // span is the match -> adjust end only
                        return [newSpan[0], newSpan[1] - lengthDiff];
                    }
                    else {
                        // span is before the match -> nothing to adjust
                        return newSpan;
                    }
                });
            }
            return newContent;
        });
        // Now that the replacement function ran, we can adjust the spans for the next run
        scriptMatchSpans = newScriptMatchSpans;
        styleMatchSpans = newStyleMatchSpans;
        return newSource;
        function withinOtherSpan(idx) {
            return otherSpans.some((otherSpan) => idx > otherSpan[0] && idx < otherSpan[1]);
        }
    }
    function getRegexp(tagName) {
        return new RegExp(`<!--[^]*?-->|<${tagName}([^]*?)>([^]*?)<\/${tagName}>`, 'g');
    }
}
function hasSnippedContent(text) {
    return text.includes(snippedTagContentAttribute);
}
function unsnipContent(text) {
    const regex = /(<\w+.*?)\s*✂prettier:content✂="(.*?)">.*?(?=<\/)/gi;
    return text.replace(regex, (_, start, encodedContent) => {
        const content = Buffer.from(encodedContent, 'base64').toString('utf8');
        return `${start}>${content}`;
    });
}

function getText(node, options, unsnip = false) {
    const leadingComments = node.leadingComments;
    const text = options.originalText.slice(options.locStart(
    // if there are comments before the node they are not included
    // in the `start` of the node itself
    (leadingComments && leadingComments[0]) || node), options.locEnd(node));
    if (!unsnip || !hasSnippedContent(text)) {
        return text;
    }
    return unsnipContent(text);
}

function makeChoice(choice) {
    return { value: choice, description: choice };
}
const options = {
    svelteSortOrder: {
        since: '0.6.0',
        category: 'Svelte',
        type: 'choice',
        default: 'options-scripts-markup-styles',
        description: 'Sort order for scripts, markup, and styles',
        choices: [
            makeChoice('options-scripts-markup-styles'),
            makeChoice('options-scripts-styles-markup'),
            makeChoice('options-markup-styles-scripts'),
            makeChoice('options-markup-scripts-styles'),
            makeChoice('options-styles-markup-scripts'),
            makeChoice('options-styles-scripts-markup'),
            makeChoice('scripts-options-markup-styles'),
            makeChoice('scripts-options-styles-markup'),
            makeChoice('markup-options-styles-scripts'),
            makeChoice('markup-options-scripts-styles'),
            makeChoice('styles-options-markup-scripts'),
            makeChoice('styles-options-scripts-markup'),
            makeChoice('scripts-markup-options-styles'),
            makeChoice('scripts-styles-options-markup'),
            makeChoice('markup-styles-options-scripts'),
            makeChoice('markup-scripts-options-styles'),
            makeChoice('styles-markup-options-scripts'),
            makeChoice('styles-scripts-options-markup'),
            makeChoice('scripts-markup-styles-options'),
            makeChoice('scripts-styles-markup-options'),
            makeChoice('markup-styles-scripts-options'),
            makeChoice('markup-scripts-styles-options'),
            makeChoice('styles-markup-scripts-options'),
            makeChoice('styles-scripts-markup-options'),
            makeChoice('none'),
            // Deprecated, keep in 2.x for backwards-compatibility. svelte:options will be moved to the top
            makeChoice('scripts-markup-styles'),
            makeChoice('scripts-styles-markup'),
            makeChoice('markup-styles-scripts'),
            makeChoice('markup-scripts-styles'),
            makeChoice('styles-markup-scripts'),
            makeChoice('styles-scripts-markup'),
        ],
    },
    svelteStrictMode: {
        since: '0.7.0',
        category: 'Svelte',
        type: 'boolean',
        default: false,
        description: 'More strict HTML syntax: self-closed tags, quotes in attributes',
    },
    svelteBracketNewLine: {
        since: '0.6.0',
        category: 'Svelte',
        type: 'boolean',
        description: 'Put the `>` of a multiline element on a new line',
        deprecated: '2.5.0',
    },
    svelteAllowShorthand: {
        since: '1.0.0',
        category: 'Svelte',
        type: 'boolean',
        default: true,
        description: 'Option to enable/disable component attribute shorthand if attribute name and expressions are same',
    },
    svelteIndentScriptAndStyle: {
        since: '1.2.0',
        category: 'Svelte',
        type: 'boolean',
        default: true,
        description: 'Whether or not to indent the code inside <script> and <style> tags in Svelte files',
    },
};
const sortOrderSeparator = '-';
function parseSortOrder(sortOrder) {
    if (sortOrder === 'none') {
        return [];
    }
    const order = sortOrder.split(sortOrderSeparator);
    // For backwards compatibility: Add options to beginning if not present
    if (!order.includes('options')) {
        console.warn('svelteSortOrder is missing option `options`. This will be an error in prettier-plugin-svelte version 3.');
        order.unshift('options');
    }
    return order;
}
function isBracketSameLine(options) {
    return options.svelteBracketNewLine != null
        ? !options.svelteBracketNewLine
        : options.bracketSameLine != null
            ? options.bracketSameLine
            : false;
}

/**
 * Determines whether or not given node
 * is the root of the Svelte AST.
 */
function isASTNode(n) {
    return n && n.__isRoot;
}
function isPreTagContent(path) {
    const stack = path.stack;
    return stack.some((node) => (node.type === 'Element' && node.name.toLowerCase() === 'pre') ||
        (node.type === 'Attribute' && !formattableAttributes.includes(node.name)));
}
function flatten(arrays) {
    return [].concat.apply([], arrays);
}
function findLastIndex(isMatch, items) {
    for (let i = items.length - 1; i >= 0; i--) {
        if (isMatch(items[i], i)) {
            return i;
        }
    }
    return -1;
}
function replaceEndOfLineWith(text, replacement) {
    const parts = [];
    for (const part of text.split('\n')) {
        if (parts.length > 0) {
            parts.push(replacement);
        }
        if (part.endsWith('\r')) {
            parts.push(part.slice(0, -1));
        }
        else {
            parts.push(part);
        }
    }
    return parts;
}
function groupConcat(contents) {
    const { concat, group } = prettier.doc.builders;
    return group(concat(contents));
}
function getAttributeLine(node, options) {
    const { hardline, line } = prettier.doc.builders;
    const hasThisBinding = (node.type === 'InlineComponent' && !!node.expression) ||
        (node.type === 'Element' && !!node.tag);
    const attributes = node.attributes.filter((attribute) => attribute.name !== snippedTagContentAttribute);
    return options.singleAttributePerLine &&
        (attributes.length > 1 || (attributes.length && hasThisBinding))
        ? hardline
        : line;
}
function printWithPrependedAttributeLine(node, options, print) {
    return (path) => path.getNode().name !== snippedTagContentAttribute
        ? prettier.doc.builders.concat([getAttributeLine(node, options), path.call(print)])
        : '';
}

/**
 * Check if doc is a hardline.
 * We can't just rely on a simple equality check because the doc could be created with another
 * runtime version of prettier than what we import, making a reference check fail.
 */
function isHardline(docToCheck) {
    return docToCheck === prettier.doc.builders.hardline || deepEqual(docToCheck, prettier.doc.builders.hardline);
}
/**
 * Simple deep equal function which suits our needs. Only works properly on POJOs without cyclic deps.
 */
function deepEqual(x, y) {
    if (x === y) {
        return true;
    }
    else if (typeof x == 'object' && x != null && typeof y == 'object' && y != null) {
        if (Object.keys(x).length != Object.keys(y).length)
            return false;
        for (var prop in x) {
            if (y.hasOwnProperty(prop)) {
                if (!deepEqual(x[prop], y[prop]))
                    return false;
            }
            else {
                return false;
            }
        }
        return true;
    }
    else {
        return false;
    }
}
function isDocCommand(doc) {
    return typeof doc === 'object' && doc !== null;
}
function isLine(docToCheck) {
    return (isHardline(docToCheck) ||
        (isDocCommand(docToCheck) && docToCheck.type === 'line') ||
        (isDocCommand(docToCheck) &&
            docToCheck.type === 'concat' &&
            docToCheck.parts.every(isLine)) ||
        // Since Prettier 2.3.0, concats are represented as flat arrays
        (Array.isArray(docToCheck) && docToCheck.every(isLine)));
}
/**
 * Check if the doc is empty, i.e. consists of nothing more than empty strings (possibly nested).
 */
function isEmptyDoc(doc) {
    if (typeof doc === 'string') {
        return doc.length === 0;
    }
    if (isDocCommand(doc) && doc.type === 'line') {
        return !doc.keepIfLonely;
    }
    // Since Prettier 2.3.0, concats are represented as flat arrays
    if (Array.isArray(doc)) {
        return doc.length === 0;
    }
    const { contents } = doc;
    if (contents) {
        return isEmptyDoc(contents);
    }
    const { parts } = doc;
    if (parts) {
        return isEmptyGroup(parts);
    }
    return false;
}
function isEmptyGroup(group) {
    return !group.find((doc) => !isEmptyDoc(doc));
}
/**
 * Trims both leading and trailing nodes matching `isWhitespace` independent of nesting level
 * (though all trimmed adjacent nodes need to be a the same level). Modifies the `docs` array.
 */
function trim(docs, isWhitespace) {
    trimLeft(docs, isWhitespace);
    trimRight(docs, isWhitespace);
    return docs;
}
/**
 * Trims the leading nodes matching `isWhitespace` independent of nesting level (though all nodes need to be a the same level).
 * If there are empty docs before the first whitespace, they are removed, too.
 */
function trimLeft(group, isWhitespace) {
    let firstNonWhitespace = group.findIndex((doc) => !isEmptyDoc(doc) && !isWhitespace(doc));
    if (firstNonWhitespace < 0 && group.length) {
        firstNonWhitespace = group.length;
    }
    if (firstNonWhitespace > 0) {
        const removed = group.splice(0, firstNonWhitespace);
        if (removed.every(isEmptyDoc)) {
            return trimLeft(group, isWhitespace);
        }
    }
    else {
        const parts = getParts(group[0]);
        if (parts) {
            return trimLeft(parts, isWhitespace);
        }
    }
}
/**
 * Trims the trailing nodes matching `isWhitespace` independent of nesting level (though all nodes need to be a the same level).
 * If there are empty docs after the last whitespace, they are removed, too.
 */
function trimRight(group, isWhitespace) {
    let lastNonWhitespace = group.length
        ? findLastIndex((doc) => !isEmptyDoc(doc) && !isWhitespace(doc), group)
        : 0;
    if (lastNonWhitespace < group.length - 1) {
        const removed = group.splice(lastNonWhitespace + 1);
        if (removed.every(isEmptyDoc)) {
            return trimRight(group, isWhitespace);
        }
    }
    else {
        const parts = getParts(group[group.length - 1]);
        if (parts) {
            return trimRight(parts, isWhitespace);
        }
    }
}
function getParts(doc) {
    if (typeof doc === 'object') {
        // Since Prettier 2.3.0, concats are represented as flat arrays
        if (Array.isArray(doc)) {
            return doc;
        }
        if (doc.type === 'fill' || doc.type === 'concat') {
            return doc.parts;
        }
        if (doc.type === 'group') {
            return getParts(doc.contents);
        }
    }
}
/**
 * `(foo = bar)` => `foo = bar`
 */
function removeParentheses(doc) {
    return trim([doc], (_doc) => _doc === '(' || _doc === ')')[0];
}

const unsupportedLanguages = ['coffee', 'coffeescript', 'styl', 'stylus', 'sass'];
function isInlineElement(path, options, node) {
    return (node && node.type === 'Element' && !isBlockElement(node, options) && !isPreTagContent(path));
}
function isBlockElement(node, options) {
    return (node &&
        node.type === 'Element' &&
        options.htmlWhitespaceSensitivity !== 'strict' &&
        (options.htmlWhitespaceSensitivity === 'ignore' ||
            blockElements.includes(node.name)));
}
function isSvelteBlock(node) {
    return [
        'IfBlock',
        'AwaitBlock',
        'CatchBlock',
        'EachBlock',
        'ElseBlock',
        'KeyBlock',
        'PendingBlock',
        'ThenBlock',
    ].includes(node.type);
}
function isNodeWithChildren(node) {
    return node.children;
}
function getChildren(node) {
    return isNodeWithChildren(node) ? node.children : [];
}
/**
 * Returns siblings, that is, the children of the parent.
 */
function getSiblings(path) {
    let parent = path.getParentNode();
    if (isASTNode(parent)) {
        parent = parent.html;
    }
    return getChildren(parent);
}
/**
 * Returns the next sibling node.
 */
function getNextNode(path, node = path.getNode()) {
    return getSiblings(path).find((child) => child.start === node.end);
}
/**
 * Returns the comment that is above the current node.
 */
function getLeadingComment(path) {
    const siblings = getSiblings(path);
    let node = path.getNode();
    let prev = siblings.find((child) => child.end === node.start);
    while (prev) {
        if (prev.type === 'Comment' &&
            !isIgnoreStartDirective(prev) &&
            !isIgnoreEndDirective(prev)) {
            return prev;
        }
        else if (isEmptyTextNode(prev)) {
            node = prev;
            prev = siblings.find((child) => child.end === node.start);
        }
        else {
            return undefined;
        }
    }
}
/**
 * Did there use to be any embedded object (that has been snipped out of the AST to be moved)
 * at the specified position?
 */
function doesEmbedStartAfterNode(node, path, siblings = getSiblings(path)) {
    // If node is not at the top level of html, an embed cannot start after it,
    // because embeds are only at the top level
    if (!isNodeTopLevelHTML(node, path)) {
        return false;
    }
    const position = node.end;
    const root = path.stack[0];
    const embeds = [root.css, root.html, root.instance, root.js, root.module];
    const nextNode = siblings[siblings.indexOf(node) + 1];
    return embeds.find((n) => n && n.start >= position && (!nextNode || n.end <= nextNode.start));
}
function isNodeTopLevelHTML(node, path) {
    const root = path.stack[0];
    return !!root.html && !!root.html.children && root.html.children.includes(node);
}
function isEmptyTextNode(node) {
    return !!node && node.type === 'Text' && getUnencodedText(node).trim() === '';
}
function isIgnoreDirective(node) {
    return !!node && node.type === 'Comment' && node.data.trim() === 'prettier-ignore';
}
function isIgnoreStartDirective(node) {
    return !!node && node.type === 'Comment' && node.data.trim() === 'prettier-ignore-start';
}
function isIgnoreEndDirective(node) {
    return !!node && node.type === 'Comment' && node.data.trim() === 'prettier-ignore-end';
}
function printRaw(node, originalText, stripLeadingAndTrailingNewline = false) {
    if (node.children.length === 0) {
        return '';
    }
    const firstChild = node.children[0];
    const lastChild = node.children[node.children.length - 1];
    let raw = originalText.substring(firstChild.start, lastChild.end);
    if (!stripLeadingAndTrailingNewline) {
        return raw;
    }
    if (startsWithLinebreak(raw)) {
        raw = raw.substring(raw.indexOf('\n') + 1);
    }
    if (endsWithLinebreak(raw)) {
        raw = raw.substring(0, raw.lastIndexOf('\n'));
        if (raw.charAt(raw.length - 1) === '\r') {
            raw = raw.substring(0, raw.length - 1);
        }
    }
    return raw;
}
function isTextNode(node) {
    return node.type === 'Text';
}
function getAttributeValue(attributeName, node) {
    const attributes = node['attributes'];
    const langAttribute = attributes.find((attribute) => attribute.name === attributeName);
    return langAttribute && langAttribute.value;
}
function getAttributeTextValue(attributeName, node) {
    const value = getAttributeValue(attributeName, node);
    if (value != null && typeof value === 'object') {
        const textValue = value.find(isTextNode);
        if (textValue) {
            return textValue.data;
        }
    }
    return null;
}
function getLangAttribute(node) {
    const value = getAttributeTextValue('lang', node) || getAttributeTextValue('type', node);
    if (value != null) {
        return value.replace(/^text\//, '');
    }
    else {
        return null;
    }
}
/**
 * Checks whether the node contains a `lang` or `type` attribute with a value corresponding to
 * a language we cannot format. This might for example be `<template lang="pug">`.
 * If the node does not contain a `lang` attribute, the result is true.
 */
function isNodeSupportedLanguage(node) {
    const lang = getLangAttribute(node);
    return !(lang && unsupportedLanguages.includes(lang));
}
/**
 * Checks whether the node contains a `lang` or `type` attribute which indicates that
 * the script contents are written in TypeScript. Note that the absence of the tag
 * does not mean it's not TypeScript, because the user could have set the default
 * to TypeScript in his settings.
 */
function isTypeScript(node) {
    const lang = getLangAttribute(node) || '';
    return ['typescript', 'ts'].includes(lang);
}
function isPugTemplate(node) {
    return node.type === 'Element' && node.name === 'template' && getLangAttribute(node) === 'pug';
}
function isLoneMustacheTag(node) {
    return node !== true && node.length === 1 && node[0].type === 'MustacheTag';
}
function isAttributeShorthand(node) {
    return node !== true && node.length === 1 && node[0].type === 'AttributeShorthand';
}
/**
 * True if node is of type `{a}` or `a={a}`
 */
function isOrCanBeConvertedToShorthand(node) {
    if (isAttributeShorthand(node.value)) {
        return true;
    }
    if (isLoneMustacheTag(node.value)) {
        const expression = node.value[0].expression;
        return expression.type === 'Identifier' && expression.name === node.name;
    }
    return false;
}
function getUnencodedText(node) {
    // `raw` will contain HTML entities in unencoded form
    return node.raw || node.data;
}
function isTextNodeStartingWithLinebreak(node, nrLines = 1) {
    return node.type === 'Text' && startsWithLinebreak(getUnencodedText(node), nrLines);
}
function startsWithLinebreak(text, nrLines = 1) {
    return new RegExp(`^([\\t\\f\\r ]*\\n){${nrLines}}`).test(text);
}
function isTextNodeEndingWithLinebreak(node, nrLines = 1) {
    return node.type === 'Text' && endsWithLinebreak(getUnencodedText(node), nrLines);
}
function endsWithLinebreak(text, nrLines = 1) {
    return new RegExp(`(\\n[\\t\\f\\r ]*){${nrLines}}$`).test(text);
}
function isTextNodeStartingWithWhitespace(node) {
    return node.type === 'Text' && /^\s/.test(getUnencodedText(node));
}
function isTextNodeEndingWithWhitespace(node) {
    return node.type === 'Text' && /\s$/.test(getUnencodedText(node));
}
function trimTextNodeRight(node) {
    node.raw = node.raw && node.raw.trimRight();
    node.data = node.data && node.data.trimRight();
}
function trimTextNodeLeft(node) {
    node.raw = node.raw && node.raw.trimLeft();
    node.data = node.data && node.data.trimLeft();
}
/**
 * Remove all leading whitespace up until the first non-empty text node,
 * and all trailing whitespace from the last non-empty text node onwards.
 */
function trimChildren(children, path) {
    let firstNonEmptyNode = children.findIndex((n) => !isEmptyTextNode(n) && !doesEmbedStartAfterNode(n, path));
    firstNonEmptyNode = firstNonEmptyNode === -1 ? children.length - 1 : firstNonEmptyNode;
    let lastNonEmptyNode = findLastIndex((n, idx) => {
        // Last node is ok to end at the start of an embedded region,
        // if it's not a comment (which should stick to the region)
        return (!isEmptyTextNode(n) &&
            ((idx === children.length - 1 && n.type !== 'Comment') ||
                !doesEmbedStartAfterNode(n, path)));
    }, children);
    lastNonEmptyNode = lastNonEmptyNode === -1 ? 0 : lastNonEmptyNode;
    for (let i = 0; i <= firstNonEmptyNode; i++) {
        const n = children[i];
        if (n.type === 'Text') {
            trimTextNodeLeft(n);
        }
    }
    for (let i = children.length - 1; i >= lastNonEmptyNode; i--) {
        const n = children[i];
        if (n.type === 'Text') {
            trimTextNodeRight(n);
        }
    }
}
/**
 * Check if given node's start tag should hug its first child. This is the case for inline elements when there's
 * no whitespace between the `>` and the first child.
 */
function shouldHugStart(node, isSupportedLanguage, options) {
    if (!isSupportedLanguage) {
        return true;
    }
    if (isBlockElement(node, options)) {
        return false;
    }
    if (!isNodeWithChildren(node)) {
        return false;
    }
    const children = node.children;
    if (children.length === 0) {
        return true;
    }
    if (options.htmlWhitespaceSensitivity === 'ignore') {
        return false;
    }
    const firstChild = children[0];
    return !isTextNodeStartingWithWhitespace(firstChild);
}
/**
 * Check if given node's end tag should hug its last child. This is the case for inline elements when there's
 * no whitespace between the last child and the `</`.
 */
function shouldHugEnd(node, isSupportedLanguage, options) {
    if (!isSupportedLanguage) {
        return true;
    }
    if (isBlockElement(node, options)) {
        return false;
    }
    if (!isNodeWithChildren(node)) {
        return false;
    }
    const children = node.children;
    if (children.length === 0) {
        return true;
    }
    if (options.htmlWhitespaceSensitivity === 'ignore') {
        return false;
    }
    const lastChild = children[children.length - 1];
    return !isTextNodeEndingWithWhitespace(lastChild);
}
/**
 * Check for a svelte block if there's whitespace at the start and if it's a space or a line.
 */
function checkWhitespaceAtStartOfSvelteBlock(node, options) {
    if (!isSvelteBlock(node) || !isNodeWithChildren(node)) {
        return 'none';
    }
    const children = node.children;
    if (children.length === 0) {
        return 'none';
    }
    const firstChild = children[0];
    if (isTextNodeStartingWithLinebreak(firstChild)) {
        return 'line';
    }
    else if (isTextNodeStartingWithWhitespace(firstChild)) {
        return 'space';
    }
    // This extra check is necessary because the Svelte AST might swallow whitespace between
    // the block's starting end and its first child.
    const parentOpeningEnd = options.originalText.lastIndexOf('}', firstChild.start);
    if (parentOpeningEnd > 0 && firstChild.start > parentOpeningEnd + 1) {
        const textBetween = options.originalText.substring(parentOpeningEnd + 1, firstChild.start);
        if (textBetween.trim() === '') {
            return startsWithLinebreak(textBetween) ? 'line' : 'space';
        }
    }
    return 'none';
}
/**
 * Check for a svelte block if there's whitespace at the end and if it's a space or a line.
 */
function checkWhitespaceAtEndOfSvelteBlock(node, options) {
    if (!isSvelteBlock(node) || !isNodeWithChildren(node)) {
        return 'none';
    }
    const children = node.children;
    if (children.length === 0) {
        return 'none';
    }
    const lastChild = children[children.length - 1];
    if (isTextNodeEndingWithLinebreak(lastChild)) {
        return 'line';
    }
    else if (isTextNodeEndingWithWhitespace(lastChild)) {
        return 'space';
    }
    // This extra check is necessary because the Svelte AST might swallow whitespace between
    // the last child and the block's ending start.
    const parentClosingStart = options.originalText.indexOf('{', lastChild.end);
    if (parentClosingStart > 0 && lastChild.end < parentClosingStart) {
        const textBetween = options.originalText.substring(lastChild.end, parentClosingStart);
        if (textBetween.trim() === '') {
            return endsWithLinebreak(textBetween) ? 'line' : 'space';
        }
    }
    return 'none';
}
function isInsideQuotedAttribute(path, options) {
    const stack = path.stack;
    return stack.some((node) => node.type === 'Attribute' &&
        (!isLoneMustacheTag(node.value) || options.svelteStrictMode));
}
/**
 * Returns true if the softline between `</tagName` and `>` can be omitted.
 */
function canOmitSoftlineBeforeClosingTag(node, path, options) {
    return (isBracketSameLine(options) &&
        (!hugsStartOfNextNode(node, options) || isLastChildWithinParentBlockElement(path, options)));
}
/**
 * Return true if given node does not hug the next node, meaning there's whitespace
 * or the end of the doc afterwards.
 */
function hugsStartOfNextNode(node, options) {
    if (node.end === options.originalText.length) {
        // end of document
        return false;
    }
    return !options.originalText.substring(node.end).match(/^\s/);
}
function isLastChildWithinParentBlockElement(path, options) {
    const parent = path.getParentNode();
    if (!parent || !isBlockElement(parent, options)) {
        return false;
    }
    const children = getChildren(parent);
    const lastChild = children[children.length - 1];
    return lastChild === path.getNode();
}

const { concat, join, line, group, indent, dedent, softline, hardline, fill, breakParent, literalline, } = prettier.doc.builders;
function hasPragma(text) {
    return /^\s*<!--\s*@(format|prettier)\W/.test(text);
}
let ignoreNext = false;
let ignoreRange = false;
let svelteOptionsDoc;
function print(path, options, print) {
    const bracketSameLine = isBracketSameLine(options);
    const n = path.getValue();
    if (!n) {
        return '';
    }
    if (isASTNode(n)) {
        assignCommentsToNodes(n);
        return printTopLevelParts(n, options, path, print);
    }
    const [open, close] = options.svelteStrictMode ? ['"{', '}"'] : ['{', '}'];
    const printJsExpression = () => [
        open,
        printJS(path, print, options.svelteStrictMode, false, false, 'expression'),
        close,
    ];
    const node = n;
    if ((ignoreNext || (ignoreRange && !isIgnoreEndDirective(node))) &&
        (node.type !== 'Text' || !isEmptyTextNode(node))) {
        if (ignoreNext) {
            ignoreNext = false;
        }
        return concat(flatten(options.originalText
            .slice(options.locStart(node), options.locEnd(node))
            .split('\n')
            .map((o, i) => (i == 0 ? [o] : [literalline, o]))));
    }
    switch (node.type) {
        case 'Fragment':
            const children = node.children;
            if (children.length === 0 || children.every(isEmptyTextNode)) {
                return '';
            }
            if (!isPreTagContent(path)) {
                trimChildren(node.children, path);
                const output = trim([printChildren(path, print, options)], (n) => isLine(n) ||
                    (typeof n === 'string' && n.trim() === '') ||
                    // Because printChildren may append this at the end and
                    // may hide other lines before it
                    n === breakParent);
                if (output.every((doc) => isEmptyDoc(doc))) {
                    return '';
                }
                return groupConcat([...output, hardline]);
            }
            else {
                return groupConcat(path.map(print, 'children'));
            }
        case 'Text':
            if (!isPreTagContent(path)) {
                if (isEmptyTextNode(node)) {
                    const hasWhiteSpace = getUnencodedText(node).trim().length < getUnencodedText(node).length;
                    const hasOneOrMoreNewlines = /\n/.test(getUnencodedText(node));
                    const hasTwoOrMoreNewlines = /\n\r?\s*\n\r?/.test(getUnencodedText(node));
                    if (hasTwoOrMoreNewlines) {
                        return concat([hardline, hardline]);
                    }
                    if (hasOneOrMoreNewlines) {
                        return hardline;
                    }
                    if (hasWhiteSpace) {
                        return line;
                    }
                    return '';
                }
                /**
                 * For non-empty text nodes each sequence of non-whitespace characters (effectively,
                 * each "word") is joined by a single `line`, which will be rendered as a single space
                 * until this node's current line is out of room, at which `fill` will break at the
                 * most convenient instance of `line`.
                 */
                return fill(splitTextToDocs(node));
            }
            else {
                let rawText = getUnencodedText(node);
                const parent = path.getParentNode();
                if (parent.type === 'Attribute') {
                    // Direct child of attribute value -> add literallines at end of lines
                    // so that other things don't break in unexpected places
                    if (parent.name === 'class' && path.getParentNode(1).type === 'Element') {
                        // Special treatment for class attribute on html elements. Prettier
                        // will force everything into one line, we deviate from that and preserve lines.
                        rawText = rawText.replace(/([^ \t\n])(([ \t]+$)|([ \t]+(\r?\n))|[ \t]+)/g, 
                        // Remove trailing whitespace in lines with non-whitespace characters
                        // except at the end of the string
                        (match, characterBeforeWhitespace, _, isEndOfString, isEndOfLine, endOfLine) => isEndOfString
                            ? match
                            : characterBeforeWhitespace + (isEndOfLine ? endOfLine : ' '));
                        // Shrink trailing whitespace in case it's followed by a mustache tag
                        // and remove it completely if it's at the end of the string, but not
                        // if it's on its own line
                        rawText = rawText.replace(/([^ \t\n])[ \t]+$/, parent.value.indexOf(node) === parent.value.length - 1 ? '$1' : '$1 ');
                    }
                    return concat(replaceEndOfLineWith(rawText, literalline));
                }
                return rawText;
            }
        case 'Element':
        case 'InlineComponent':
        case 'Slot':
        case 'SlotTemplate':
        case 'Window':
        case 'Head':
        case 'Title': {
            const isSupportedLanguage = !(node.name === 'template' && !isNodeSupportedLanguage(node));
            const isEmpty = node.children.every((child) => isEmptyTextNode(child));
            const isDoctypeTag = node.name.toUpperCase() === '!DOCTYPE';
            const isSelfClosingTag = isEmpty &&
                (!options.svelteStrictMode ||
                    node.type !== 'Element' ||
                    selfClosingTags.indexOf(node.name) !== -1 ||
                    isDoctypeTag);
            // Order important: print attributes first
            const attributes = path.map(printWithPrependedAttributeLine(node, options, print), 'attributes');
            const attributeLine = getAttributeLine(node, options);
            const possibleThisBinding = node.type === 'InlineComponent' && node.expression
                ? concat([attributeLine, 'this=', ...printJsExpression()])
                : node.type === 'Element' && node.tag
                    ? concat([
                        attributeLine,
                        'this=',
                        ...(typeof node.tag === 'string'
                            ? [`"${node.tag}"`]
                            : [
                                open,
                                printJS(path, print, options.svelteStrictMode, false, false, 'tag'),
                                close,
                            ]),
                    ])
                    : '';
            if (isSelfClosingTag) {
                return groupConcat([
                    '<',
                    node.name,
                    indent(groupConcat([
                        possibleThisBinding,
                        ...attributes,
                        bracketSameLine || isDoctypeTag ? '' : dedent(line),
                    ])),
                    ...[bracketSameLine && !isDoctypeTag ? ' ' : '', `${isDoctypeTag ? '' : '/'}>`],
                ]);
            }
            const children = node.children;
            const firstChild = children[0];
            const lastChild = children[children.length - 1];
            // Is a function which is invoked later because printChildren will manipulate child nodes
            // which would wrongfully change the other checks about hugging etc done beforehand
            let body;
            const hugStart = shouldHugStart(node, isSupportedLanguage, options);
            const hugEnd = shouldHugEnd(node, isSupportedLanguage, options);
            if (isEmpty) {
                body =
                    isInlineElement(path, options, node) &&
                        node.children.length &&
                        isTextNodeStartingWithWhitespace(node.children[0]) &&
                        !isPreTagContent(path)
                        ? () => line
                        : () => (bracketSameLine ? softline : '');
            }
            else if (isPreTagContent(path)) {
                body = () => printPre(node, options.originalText, path, print);
            }
            else if (!isSupportedLanguage) {
                body = () => printRaw(node, options.originalText, true);
            }
            else if (isInlineElement(path, options, node) && !isPreTagContent(path)) {
                body = () => printChildren(path, print, options);
            }
            else {
                body = () => printChildren(path, print, options);
            }
            const openingTag = [
                '<',
                node.name,
                indent(groupConcat([
                    possibleThisBinding,
                    ...attributes,
                    hugStart
                        ? ''
                        : !bracketSameLine && !isPreTagContent(path)
                            ? dedent(softline)
                            : '',
                ])),
            ];
            if (!isSupportedLanguage && !isEmpty) {
                // Format template tags so that there's a hardline but no indention.
                // That way the `lang="X"` and the closing `>` of the start tag stay in one line
                // which is the 99% use case.
                return groupConcat([
                    ...openingTag,
                    '>',
                    groupConcat([hardline, body(), hardline]),
                    `</${node.name}>`,
                ]);
            }
            if (hugStart && hugEnd) {
                const huggedContent = concat([
                    softline,
                    groupConcat(['>', body(), `</${node.name}`]),
                ]);
                const omitSoftlineBeforeClosingTag = (isEmpty && !bracketSameLine) ||
                    canOmitSoftlineBeforeClosingTag(node, path, options);
                return groupConcat([
                    ...openingTag,
                    isEmpty ? group(huggedContent) : group(indent(huggedContent)),
                    omitSoftlineBeforeClosingTag ? '' : softline,
                    '>',
                ]);
            }
            // No hugging of content means it's either a block element and/or there's whitespace at the start/end
            let noHugSeparatorStart = softline;
            let noHugSeparatorEnd = softline;
            if (isPreTagContent(path)) {
                noHugSeparatorStart = '';
                noHugSeparatorEnd = '';
            }
            else {
                let didSetEndSeparator = false;
                if (!hugStart && firstChild && firstChild.type === 'Text') {
                    if (isTextNodeStartingWithLinebreak(firstChild) &&
                        firstChild !== lastChild &&
                        (!isInlineElement(path, options, node) ||
                            isTextNodeEndingWithWhitespace(lastChild))) {
                        noHugSeparatorStart = hardline;
                        noHugSeparatorEnd = hardline;
                        didSetEndSeparator = true;
                    }
                    else if (isInlineElement(path, options, node)) {
                        noHugSeparatorStart = line;
                    }
                    trimTextNodeLeft(firstChild);
                }
                if (!hugEnd && lastChild && lastChild.type === 'Text') {
                    if (isInlineElement(path, options, node) && !didSetEndSeparator) {
                        noHugSeparatorEnd = line;
                    }
                    trimTextNodeRight(lastChild);
                }
            }
            if (hugStart) {
                return groupConcat([
                    ...openingTag,
                    indent(concat([softline, groupConcat(['>', body()])])),
                    noHugSeparatorEnd,
                    `</${node.name}>`,
                ]);
            }
            if (hugEnd) {
                return groupConcat([
                    ...openingTag,
                    '>',
                    indent(concat([noHugSeparatorStart, groupConcat([body(), `</${node.name}`])])),
                    canOmitSoftlineBeforeClosingTag(node, path, options) ? '' : softline,
                    '>',
                ]);
            }
            if (isEmpty) {
                return groupConcat([...openingTag, '>', body(), `</${node.name}>`]);
            }
            return groupConcat([
                ...openingTag,
                '>',
                indent(concat([noHugSeparatorStart, body()])),
                noHugSeparatorEnd,
                `</${node.name}>`,
            ]);
        }
        case 'Options':
            if (options.svelteSortOrder !== 'none') {
                throw new Error('Options tags should have been handled by prepareChildren');
            }
        // else fall through to Body
        case 'Body':
            return groupConcat([
                '<',
                node.name,
                indent(groupConcat([
                    ...path.map(printWithPrependedAttributeLine(node, options, print), 'attributes'),
                    bracketSameLine ? '' : dedent(line),
                ])),
                ...[bracketSameLine ? ' ' : '', '/>'],
            ]);
        case 'Document':
            return groupConcat([
                '<',
                node.name,
                indent(groupConcat([
                    ...path.map(printWithPrependedAttributeLine(node, options, print), 'attributes'),
                    bracketSameLine ? '' : dedent(line),
                ])),
                ...[bracketSameLine ? ' ' : '', '/>'],
            ]);
        case 'Identifier':
            return node.name;
        case 'AttributeShorthand': {
            return node.expression.name;
        }
        case 'Attribute': {
            if (isOrCanBeConvertedToShorthand(node)) {
                if (options.svelteStrictMode) {
                    return concat([node.name, '="{', node.name, '}"']);
                }
                else if (options.svelteAllowShorthand) {
                    return concat(['{', node.name, '}']);
                }
                else {
                    return concat([node.name, '={', node.name, '}']);
                }
            }
            else {
                if (node.value === true) {
                    return concat([node.name]);
                }
                const quotes = !isLoneMustacheTag(node.value) || options.svelteStrictMode;
                const attrNodeValue = printAttributeNodeValue(path, print, quotes, node);
                if (quotes) {
                    return concat([node.name, '=', '"', attrNodeValue, '"']);
                }
                else {
                    return concat([node.name, '=', attrNodeValue]);
                }
            }
        }
        case 'MustacheTag':
            return concat([
                '{',
                printJS(path, print, isInsideQuotedAttribute(path, options), false, false, 'expression'),
                '}',
            ]);
        case 'IfBlock': {
            const def = [
                '{#if ',
                printSvelteBlockJS(path, print, 'expression'),
                '}',
                printSvelteBlockChildren(path, print, options),
            ];
            if (node.else) {
                def.push(path.call(print, 'else'));
            }
            def.push('{/if}');
            return concat([groupConcat(def), breakParent]);
        }
        case 'ElseBlock': {
            // Else if
            const parent = path.getParentNode();
            if (node.children.length === 1 &&
                node.children[0].type === 'IfBlock' &&
                parent.type !== 'EachBlock') {
                const ifNode = node.children[0];
                const def = [
                    '{:else if ',
                    path.map((ifPath) => printSvelteBlockJS(ifPath, print, 'expression'), 'children')[0],
                    '}',
                    path.map((ifPath) => printSvelteBlockChildren(ifPath, print, options), 'children')[0],
                ];
                if (ifNode.else) {
                    def.push(path.map((ifPath) => ifPath.call(print, 'else'), 'children')[0]);
                }
                return concat(def);
            }
            return concat(['{:else}', printSvelteBlockChildren(path, print, options)]);
        }
        case 'EachBlock': {
            const def = [
                '{#each ',
                printSvelteBlockJS(path, print, 'expression'),
                ' as',
                expandNode(node.context),
            ];
            if (node.index) {
                def.push(', ', node.index);
            }
            if (node.key) {
                def.push(' (', printSvelteBlockJS(path, print, 'key'), ')');
            }
            def.push('}', printSvelteBlockChildren(path, print, options));
            if (node.else) {
                def.push(path.call(print, 'else'));
            }
            def.push('{/each}');
            return concat([groupConcat(def), breakParent]);
        }
        case 'AwaitBlock': {
            const hasPendingBlock = node.pending.children.some((n) => !isEmptyTextNode(n));
            const hasThenBlock = node.then.children.some((n) => !isEmptyTextNode(n));
            const hasCatchBlock = node.catch.children.some((n) => !isEmptyTextNode(n));
            let block = [];
            if (!hasPendingBlock && hasThenBlock) {
                block.push(groupConcat([
                    '{#await ',
                    printSvelteBlockJS(path, print, 'expression'),
                    ' then',
                    expandNode(node.value),
                    '}',
                ]), path.call(print, 'then'));
            }
            else if (!hasPendingBlock && hasCatchBlock) {
                block.push(groupConcat([
                    '{#await ',
                    printSvelteBlockJS(path, print, 'expression'),
                    ' catch',
                    expandNode(node.error),
                    '}',
                ]), path.call(print, 'catch'));
            }
            else {
                block.push(groupConcat(['{#await ', printSvelteBlockJS(path, print, 'expression'), '}']));
                if (hasPendingBlock) {
                    block.push(path.call(print, 'pending'));
                }
                if (hasThenBlock) {
                    block.push(groupConcat(['{:then', expandNode(node.value), '}']), path.call(print, 'then'));
                }
            }
            if ((hasPendingBlock || hasThenBlock) && hasCatchBlock) {
                block.push(groupConcat(['{:catch', expandNode(node.error), '}']), path.call(print, 'catch'));
            }
            block.push('{/await}');
            return groupConcat(block);
        }
        case 'KeyBlock': {
            const def = [
                '{#key ',
                printSvelteBlockJS(path, print, 'expression'),
                '}',
                printSvelteBlockChildren(path, print, options),
            ];
            def.push('{/key}');
            return concat([groupConcat(def), breakParent]);
        }
        case 'ThenBlock':
        case 'PendingBlock':
        case 'CatchBlock':
            return printSvelteBlockChildren(path, print, options);
        case 'EventHandler':
            return concat([
                'on:',
                node.name,
                node.modifiers && node.modifiers.length
                    ? concat(['|', join('|', node.modifiers)])
                    : '',
                node.expression ? concat(['=', ...printJsExpression()]) : '',
            ]);
        case 'Binding':
            return concat([
                'bind:',
                node.name,
                node.expression.type === 'Identifier' &&
                    node.expression.name === node.name &&
                    options.svelteAllowShorthand &&
                    !options.svelteStrictMode
                    ? ''
                    : concat(['=', ...printJsExpression()]),
            ]);
        case 'Class':
            return concat([
                'class:',
                node.name,
                node.expression.type === 'Identifier' &&
                    node.expression.name === node.name &&
                    options.svelteAllowShorthand &&
                    !options.svelteStrictMode
                    ? ''
                    : concat(['=', ...printJsExpression()]),
            ]);
        case 'StyleDirective':
            const prefix = [
                'style:',
                node.name,
                node.modifiers && node.modifiers.length
                    ? concat(['|', join('|', node.modifiers)])
                    : '',
            ];
            if (isOrCanBeConvertedToShorthand(node) || node.value === true) {
                if (options.svelteStrictMode) {
                    return concat([...prefix, '="{', node.name, '}"']);
                }
                else if (options.svelteAllowShorthand) {
                    return concat([...prefix]);
                }
                else {
                    return concat([...prefix, '={', node.name, '}']);
                }
            }
            else {
                const quotes = !isLoneMustacheTag(node.value) || options.svelteStrictMode;
                const attrNodeValue = printAttributeNodeValue(path, print, quotes, node);
                if (quotes) {
                    return concat([...prefix, '=', '"', attrNodeValue, '"']);
                }
                else {
                    return concat([...prefix, '=', attrNodeValue]);
                }
            }
        case 'Let':
            return concat([
                'let:',
                node.name,
                // shorthand let directives have `null` expressions
                !node.expression ||
                    (node.expression.type === 'Identifier' && node.expression.name === node.name)
                    ? ''
                    : concat(['=', ...printJsExpression()]),
            ]);
        case 'DebugTag':
            return concat([
                '{@debug',
                node.identifiers.length > 0
                    ? concat([' ', join(', ', path.map(print, 'identifiers'))])
                    : '',
                '}',
            ]);
        case 'Ref':
            return concat(['ref:', node.name]);
        case 'Comment': {
            const nodeAfterComment = getNextNode(path);
            if (isIgnoreStartDirective(node) && isNodeTopLevelHTML(node, path)) {
                ignoreRange = true;
            }
            else if (isIgnoreEndDirective(node) && isNodeTopLevelHTML(node, path)) {
                ignoreRange = false;
            }
            else if (
            // If there is no sibling node that starts right after us but the parent indicates
            // that there used to be, that means that node was actually an embedded `<style>`
            // or `<script>` node that was cut out.
            // If so, the comment does not refer to the next line we will see.
            // The `embed` function handles printing the comment in the right place.
            doesEmbedStartAfterNode(node, path) ||
                (isEmptyTextNode(nodeAfterComment) &&
                    doesEmbedStartAfterNode(nodeAfterComment, path))) {
                return '';
            }
            else if (isIgnoreDirective(node)) {
                ignoreNext = true;
            }
            return printComment(node);
        }
        case 'Transition':
            const kind = node.intro && node.outro ? 'transition' : node.intro ? 'in' : 'out';
            return concat([
                kind,
                ':',
                node.name,
                node.modifiers && node.modifiers.length
                    ? concat(['|', join('|', node.modifiers)])
                    : '',
                node.expression ? concat(['=', ...printJsExpression()]) : '',
            ]);
        case 'Action':
            return concat([
                'use:',
                node.name,
                node.expression ? concat(['=', ...printJsExpression()]) : '',
            ]);
        case 'Animation':
            return concat([
                'animate:',
                node.name,
                node.expression ? concat(['=', ...printJsExpression()]) : '',
            ]);
        case 'RawMustacheTag':
            return concat([
                '{@html ',
                printJS(path, print, false, false, false, 'expression'),
                '}',
            ]);
        case 'Spread':
            return concat(['{...', printJS(path, print, false, false, false, 'expression'), '}']);
        case 'ConstTag':
            return concat([
                '{@const ',
                printJS(path, print, false, false, true, 'expression'),
                '}',
            ]);
    }
    console.error(JSON.stringify(node, null, 4));
    throw new Error('unknown node type: ' + node.type);
}
function assignCommentsToNodes(ast) {
    if (ast.module) {
        ast.module.comments = removeAndGetLeadingComments(ast, ast.module);
    }
    if (ast.instance) {
        ast.instance.comments = removeAndGetLeadingComments(ast, ast.instance);
    }
    if (ast.css) {
        ast.css.comments = removeAndGetLeadingComments(ast, ast.css);
    }
}
/**
 * Returns the comments that are above the current node and deletes them from the html ast.
 */
function removeAndGetLeadingComments(ast, current) {
    const siblings = getChildren(ast.html);
    const comments = [];
    const newlines = [];
    if (!siblings.length) {
        return [];
    }
    let node = current;
    let prev = siblings.find((child) => child.end === node.start);
    while (prev) {
        if (prev.type === 'Comment' &&
            !isIgnoreStartDirective(prev) &&
            !isIgnoreEndDirective(prev)) {
            comments.push(prev);
            if (comments.length !== newlines.length) {
                newlines.push({ type: 'Text', data: '', raw: '', start: -1, end: -1 });
            }
        }
        else if (isEmptyTextNode(prev)) {
            newlines.push(prev);
        }
        else {
            break;
        }
        node = prev;
        prev = siblings.find((child) => child.end === node.start);
    }
    newlines.length = comments.length; // could be one more if first comment is preceeded by empty text node
    for (const comment of comments) {
        siblings.splice(siblings.indexOf(comment), 1);
    }
    for (const text of newlines) {
        siblings.splice(siblings.indexOf(text), 1);
    }
    return comments
        .map((comment, i) => ({
        comment,
        emptyLineAfter: getUnencodedText(newlines[i]).split('\n').length > 2,
    }))
        .reverse();
}
function printTopLevelParts(n, options, path, print) {
    if (options.svelteSortOrder === 'none') {
        const topLevelPartsByEnd = {};
        if (n.module) {
            n.module.type = 'Script';
            n.module.attributes = extractAttributes(getText(n.module, options));
            topLevelPartsByEnd[n.module.end] = n.module;
        }
        if (n.instance) {
            n.instance.type = 'Script';
            n.instance.attributes = extractAttributes(getText(n.instance, options));
            topLevelPartsByEnd[n.instance.end] = n.instance;
        }
        if (n.css) {
            n.css.type = 'Style';
            n.css.content.type = 'StyleProgram';
            topLevelPartsByEnd[n.css.end] = n.css;
        }
        const children = getChildren(n.html);
        for (let i = 0; i < children.length; i++) {
            const node = children[i];
            if (topLevelPartsByEnd[node.start]) {
                children.splice(i, 0, topLevelPartsByEnd[node.start]);
                delete topLevelPartsByEnd[node.start];
            }
        }
        const result = path.call(print, 'html');
        if (options.insertPragma && !hasPragma(options.originalText)) {
            return concat([`<!-- @format -->`, hardline, result]);
        }
        else {
            return result;
        }
    }
    const parts = {
        options: [],
        scripts: [],
        markup: [],
        styles: [],
    };
    // scripts
    if (n.module) {
        n.module.type = 'Script';
        n.module.attributes = extractAttributes(getText(n.module, options));
        parts.scripts.push(path.call(print, 'module'));
    }
    if (n.instance) {
        n.instance.type = 'Script';
        n.instance.attributes = extractAttributes(getText(n.instance, options));
        parts.scripts.push(path.call(print, 'instance'));
    }
    // styles
    if (n.css) {
        n.css.type = 'Style';
        n.css.content.type = 'StyleProgram';
        parts.styles.push(path.call(print, 'css'));
    }
    // markup
    const htmlDoc = path.call(print, 'html');
    if (htmlDoc) {
        parts.markup.push(htmlDoc);
    }
    if (svelteOptionsDoc) {
        parts.options.push(svelteOptionsDoc);
    }
    const docs = flatten(parseSortOrder(options.svelteSortOrder).map((p) => parts[p]));
    // Need to reset these because they are global and could affect the next formatting run
    ignoreNext = false;
    ignoreRange = false;
    svelteOptionsDoc = undefined;
    // If this is invoked as an embed of markdown, remove the last hardline.
    // The markdown parser tries this, too, but fails because it does not
    // recurse into concats. Doing this will prevent an empty line
    // at the end of the embedded code block.
    if (options.parentParser === 'markdown') {
        const lastDoc = docs[docs.length - 1];
        trimRight([lastDoc], isLine);
    }
    if (options.insertPragma && !hasPragma(options.originalText)) {
        return concat([`<!-- @format -->`, hardline, groupConcat(docs)]);
    }
    else {
        return groupConcat([join(hardline, docs)]);
    }
}
function printAttributeNodeValue(path, print, quotes, node) {
    const valueDocs = path.map((childPath) => childPath.call(print), 'value');
    if (!quotes || !formattableAttributes.includes(node.name)) {
        return concat(valueDocs);
    }
    else {
        return indent(groupConcat(trim(valueDocs, isLine)));
    }
}
function printSvelteBlockChildren(path, print, options) {
    const node = path.getValue();
    const children = node.children;
    if (!children || children.length === 0) {
        return '';
    }
    const whitespaceAtStartOfBlock = checkWhitespaceAtStartOfSvelteBlock(node, options);
    const whitespaceAtEndOfBlock = checkWhitespaceAtEndOfSvelteBlock(node, options);
    const startline = whitespaceAtStartOfBlock === 'none'
        ? ''
        : whitespaceAtEndOfBlock === 'line' || whitespaceAtStartOfBlock === 'line'
            ? hardline
            : line;
    const endline = whitespaceAtEndOfBlock === 'none'
        ? ''
        : whitespaceAtEndOfBlock === 'line' || whitespaceAtStartOfBlock === 'line'
            ? hardline
            : line;
    const firstChild = children[0];
    const lastChild = children[children.length - 1];
    if (isTextNodeStartingWithWhitespace(firstChild)) {
        trimTextNodeLeft(firstChild);
    }
    if (isTextNodeEndingWithWhitespace(lastChild)) {
        trimTextNodeRight(lastChild);
    }
    return concat([
        indent(concat([startline, group(printChildren(path, print, options))])),
        endline,
    ]);
}
function printPre(node, originalText, path, print) {
    const result = [];
    const length = node.children.length;
    for (let i = 0; i < length; i++) {
        const child = node.children[i];
        if (child.type === 'Text') {
            const lines = originalText.substring(child.start, child.end).split(/\r?\n/);
            lines.forEach((line, j) => {
                if (j > 0)
                    result.push(literalline);
                result.push(line);
            });
        }
        else {
            result.push(path.call(print, 'children', i));
        }
    }
    return concat(result);
}
function printChildren(path, print, options) {
    if (isPreTagContent(path)) {
        return concat(path.map(print, 'children'));
    }
    const childNodes = prepareChildren(path.getValue().children, path, print, options);
    // modify original array because it's accessed later through map(print, 'children', idx)
    path.getValue().children = childNodes;
    if (childNodes.length === 0) {
        return '';
    }
    const childDocs = [];
    let handleWhitespaceOfPrevTextNode = false;
    for (let i = 0; i < childNodes.length; i++) {
        const childNode = childNodes[i];
        if (childNode.type === 'Text') {
            handleTextChild(i, childNode);
        }
        else if (isBlockElement(childNode, options)) {
            handleBlockChild(i);
        }
        else if (isInlineElement(path, options, childNode)) {
            handleInlineChild(i);
        }
        else {
            childDocs.push(printChild(i));
            handleWhitespaceOfPrevTextNode = false;
        }
    }
    // If there's at least one block element and more than one node, break content
    const forceBreakContent = childNodes.length > 1 && childNodes.some((child) => isBlockElement(child, options));
    if (forceBreakContent) {
        childDocs.push(breakParent);
    }
    return concat(childDocs);
    function printChild(idx) {
        return path.call(print, 'children', idx);
    }
    /**
     * Print inline child. Hug whitespace of previous text child if there was one.
     */
    function handleInlineChild(idx) {
        if (handleWhitespaceOfPrevTextNode) {
            childDocs.push(groupConcat([line, printChild(idx)]));
        }
        else {
            childDocs.push(printChild(idx));
        }
        handleWhitespaceOfPrevTextNode = false;
    }
    /**
     * Print block element. Add softlines around it if needed
     * so it breaks into a separate line if children are broken up.
     * Don't add lines at the start/end if it's the first/last child because this
     * kind of whitespace handling is done in the parent already.
     */
    function handleBlockChild(idx) {
        const prevChild = childNodes[idx - 1];
        if (prevChild &&
            !isBlockElement(prevChild, options) &&
            (prevChild.type !== 'Text' ||
                handleWhitespaceOfPrevTextNode ||
                !isTextNodeEndingWithWhitespace(prevChild))) {
            childDocs.push(softline);
        }
        childDocs.push(printChild(idx));
        const nextChild = childNodes[idx + 1];
        if (nextChild &&
            (nextChild.type !== 'Text' ||
                // Only handle text which starts with a whitespace and has text afterwards,
                // or is empty but followed by an inline element. The latter is done
                // so that if the children break, the inline element afterwards is in a separate line.
                ((!isEmptyTextNode(nextChild) ||
                    (childNodes[idx + 2] && isInlineElement(path, options, childNodes[idx + 2]))) &&
                    !isTextNodeStartingWithLinebreak(nextChild)))) {
            childDocs.push(softline);
        }
        handleWhitespaceOfPrevTextNode = false;
    }
    /**
     * Print text child. First/last child white space handling
     * is done in parent already. By definition of the Svelte AST,
     * a text node always is inbetween other tags. Add hardlines
     * if the users wants to have them inbetween.
     * If the text is trimmed right, toggle flag telling
     * subsequent (inline)block element to alter its printing logic
     * to check if they need to hug or print lines themselves.
     */
    function handleTextChild(idx, childNode) {
        handleWhitespaceOfPrevTextNode = false;
        if (idx === 0 || idx === childNodes.length - 1) {
            childDocs.push(printChild(idx));
            return;
        }
        const prevNode = childNodes[idx - 1];
        const nextNode = childNodes[idx + 1];
        if (isTextNodeStartingWithWhitespace(childNode) &&
            // If node is empty, go straight through to checking the right end
            !isEmptyTextNode(childNode)) {
            if (isInlineElement(path, options, prevNode) &&
                !isTextNodeStartingWithLinebreak(childNode)) {
                trimTextNodeLeft(childNode);
                const lastChildDoc = childDocs.pop();
                childDocs.push(groupConcat([lastChildDoc, line]));
            }
            if (isBlockElement(prevNode, options) && !isTextNodeStartingWithLinebreak(childNode)) {
                trimTextNodeLeft(childNode);
            }
        }
        if (isTextNodeEndingWithWhitespace(childNode)) {
            if (isInlineElement(path, options, nextNode) &&
                !isTextNodeEndingWithLinebreak(childNode)) {
                handleWhitespaceOfPrevTextNode = !prevNode || !isBlockElement(prevNode, options);
                trimTextNodeRight(childNode);
            }
            if (isBlockElement(nextNode, options) && !isTextNodeEndingWithLinebreak(childNode, 2)) {
                handleWhitespaceOfPrevTextNode = !prevNode || !isBlockElement(prevNode, options);
                trimTextNodeRight(childNode);
            }
        }
        childDocs.push(printChild(idx));
    }
}
/**
 * `svelte:options` is part of the html part but needs to be snipped out and handled
 * separately to reorder it as configured. The comment above it should be moved with it.
 * Do that here.
 */
function prepareChildren(children, path, print, options) {
    let svelteOptionsComment;
    const childrenWithoutOptions = [];
    const bracketSameLine = isBracketSameLine(options);
    for (let idx = 0; idx < children.length; idx++) {
        const currentChild = children[idx];
        if (currentChild.type === 'Text' && getUnencodedText(currentChild) === '') {
            continue;
        }
        if (isEmptyTextNode(currentChild) && doesEmbedStartAfterNode(currentChild, path)) {
            continue;
        }
        if (options.svelteSortOrder !== 'none') {
            if (isCommentFollowedByOptions(currentChild, idx)) {
                svelteOptionsComment = printComment(currentChild);
                const nextChild = children[idx + 1];
                idx += nextChild && isEmptyTextNode(nextChild) ? 1 : 0;
                continue;
            }
            if (currentChild.type === 'Options') {
                printSvelteOptions(currentChild, idx, path, print);
                continue;
            }
        }
        childrenWithoutOptions.push(currentChild);
    }
    const mergedChildrenWithoutOptions = [];
    for (let idx = 0; idx < childrenWithoutOptions.length; idx++) {
        const currentChild = childrenWithoutOptions[idx];
        const nextChild = childrenWithoutOptions[idx + 1];
        if (currentChild.type === 'Text' && nextChild && nextChild.type === 'Text') {
            // A tag was snipped out (f.e. svelte:options). Join text
            currentChild.raw += nextChild.raw;
            currentChild.data += nextChild.data;
            idx++;
        }
        mergedChildrenWithoutOptions.push(currentChild);
    }
    return mergedChildrenWithoutOptions;
    function printSvelteOptions(node, idx, path, print) {
        svelteOptionsDoc = groupConcat([
            groupConcat([
                '<',
                node.name,
                indent(groupConcat([
                    ...path.map(printWithPrependedAttributeLine(node, options, print), 'children', idx, 'attributes'),
                    bracketSameLine ? '' : dedent(line),
                ])),
                ...[bracketSameLine ? ' ' : '', '/>'],
            ]),
            hardline,
        ]);
        if (svelteOptionsComment) {
            svelteOptionsDoc = groupConcat([svelteOptionsComment, hardline, svelteOptionsDoc]);
        }
    }
    function isCommentFollowedByOptions(node, idx) {
        if (node.type !== 'Comment' || isIgnoreEndDirective(node) || isIgnoreStartDirective(node)) {
            return false;
        }
        const nextChild = children[idx + 1];
        if (nextChild) {
            if (isEmptyTextNode(nextChild)) {
                const afterNext = children[idx + 2];
                return afterNext && afterNext.type === 'Options';
            }
            return nextChild.type === 'Options';
        }
        return false;
    }
}
/**
 * Split the text into words separated by whitespace. Replace the whitespaces by lines,
 * collapsing multiple whitespaces into a single line.
 *
 * If the text starts or ends with multiple newlines, two of those should be kept.
 */
function splitTextToDocs(node) {
    const text = getUnencodedText(node);
    let docs = text.split(/[\t\n\f\r ]+/);
    docs = join(line, docs).parts.filter((s) => s !== '');
    if (startsWithLinebreak(text)) {
        docs[0] = hardline;
    }
    if (startsWithLinebreak(text, 2)) {
        docs = [hardline, ...docs];
    }
    if (endsWithLinebreak(text)) {
        docs[docs.length - 1] = hardline;
    }
    if (endsWithLinebreak(text, 2)) {
        docs = [...docs, hardline];
    }
    return docs;
}
function printSvelteBlockJS(path, print, name) {
    return printJS(path, print, false, true, false, name);
}
function printJS(path, print, forceSingleQuote, forceSingleLine, removeParentheses, name) {
    path.getValue()[name].isJS = true;
    path.getValue()[name].forceSingleQuote = forceSingleQuote;
    path.getValue()[name].forceSingleLine = forceSingleLine;
    path.getValue()[name].removeParentheses = removeParentheses;
    return path.call(print, name);
}
function expandNode(node, parent) {
    if (node === null) {
        return '';
    }
    if (typeof node === 'string') {
        // pre-v3.20 AST
        return ' ' + node;
    }
    switch (node.type) {
        case 'ArrayExpression':
        case 'ArrayPattern':
            return ' [' + node.elements.map(expandNode).join(',').slice(1) + ']';
        case 'AssignmentPattern':
            return expandNode(node.left) + ' =' + expandNode(node.right);
        case 'Identifier':
            return ' ' + node.name;
        case 'Literal':
            return ' ' + node.raw;
        case 'ObjectExpression':
            return ' {' + node.properties.map((p) => expandNode(p, node)).join(',') + ' }';
        case 'ObjectPattern':
            return ' {' + node.properties.map(expandNode).join(',') + ' }';
        case 'Property':
            if (node.value.type === 'ObjectPattern' || node.value.type === 'ArrayPattern') {
                return ' ' + node.key.name + ':' + expandNode(node.value);
            }
            else if ((node.value.type === 'Identifier' && node.key.name !== node.value.name) ||
                (parent && parent.type === 'ObjectExpression')) {
                return expandNode(node.key) + ':' + expandNode(node.value);
            }
            else {
                return expandNode(node.value);
            }
        case 'RestElement':
            return ' ...' + node.argument.name;
    }
    console.error(JSON.stringify(node, null, 4));
    throw new Error('unknown node type: ' + node.type);
}
function printComment(node) {
    let text = node.data;
    if (hasSnippedContent(text)) {
        text = unsnipContent(text);
    }
    return groupConcat(['<!--', text, '-->']);
}

const { builders: { concat: concat$1, hardline: hardline$1, softline: softline$1, indent: indent$1, dedent: dedent$1, literalline: literalline$1 }, utils: { removeLines }, } = prettier.doc;
function embed(path, print, textToDoc, options) {
    const node = path.getNode();
    if (node.isJS) {
        try {
            const embeddedOptions = {
                parser: expressionParser,
            };
            if (node.forceSingleQuote) {
                embeddedOptions.singleQuote = true;
            }
            let docs = textToDoc(forceIntoExpression(
            // If we have snipped content, it was done wrongly and we need to unsnip it.
            // This happens for example for {@html `<script>{foo}</script>`}
            getText(node, options, true)), embeddedOptions);
            if (node.forceSingleLine) {
                docs = removeLines(docs);
            }
            if (node.removeParentheses) {
                docs = removeParentheses(docs);
            }
            return docs;
        }
        catch (e) {
            return getText(node, options, true);
        }
    }
    const embedType = (tag, parser, isTopLevel) => embedTag(tag, options.originalText, path, (content) => formatBodyContent(content, parser, textToDoc, options), print, isTopLevel, options);
    const embedScript = (isTopLevel) => embedType('script', 
    // Use babel-ts as fallback because the absence does not mean the content is not TS,
    // the user could have set the default language. babel-ts will format things a little
    // bit different though, especially preserving parentheses around dot notation which
    // fixes https://github.com/sveltejs/prettier-plugin-svelte/issues/218
    isTypeScript(node) ? 'typescript' : 'babel-ts', isTopLevel);
    const embedStyle = (isTopLevel) => embedType('style', 'css', isTopLevel);
    const embedPug = () => embedType('template', 'pug', false);
    switch (node.type) {
        case 'Script':
            return embedScript(true);
        case 'Style':
            return embedStyle(true);
        case 'Element': {
            if (node.name === 'script') {
                return embedScript(false);
            }
            else if (node.name === 'style') {
                return embedStyle(false);
            }
            else if (isPugTemplate(node)) {
                return embedPug();
            }
        }
    }
    return null;
}
function forceIntoExpression(statement) {
    // note the trailing newline: if the statement ends in a // comment,
    // we can't add the closing bracket right afterwards
    return `(${statement}\n)`;
}
function expressionParser(text, parsers, options) {
    const ast = parsers.babel(text, parsers, options);
    return Object.assign(Object.assign({}, ast), { program: ast.program.body[0].expression });
}
function preformattedBody(str) {
    const firstNewline = /^[\t\f\r ]*\n/;
    const lastNewline = /\n[\t\f\r ]*$/;
    // If we do not start with a new line prettier might try to break the opening tag
    // to keep it together with the string. Use a literal line to skip indentation.
    return concat$1([literalline$1, str.replace(firstNewline, '').replace(lastNewline, ''), hardline$1]);
}
function getSnippedContent(node) {
    const encodedContent = getAttributeTextValue(snippedTagContentAttribute, node);
    if (encodedContent) {
        return Buffer.from(encodedContent, 'base64').toString('utf-8');
    }
    else {
        return '';
    }
}
function formatBodyContent(content, parser, textToDoc, options) {
    try {
        const body = textToDoc(content, { parser });
        if (parser === 'pug' && typeof body === 'string') {
            // Pug returns no docs but a final string.
            // Therefore prepend the line offsets
            const whitespace = options.useTabs
                ? '\t'
                : ' '.repeat(options.pugTabWidth && options.pugTabWidth > 0
                    ? options.pugTabWidth
                    : options.tabWidth);
            const pugBody = body
                .split('\n')
                .map((line) => (line ? whitespace + line : line))
                .join('\n');
            return concat$1([hardline$1, pugBody]);
        }
        const indentIfDesired = (doc) => options.svelteIndentScriptAndStyle ? indent$1(doc) : doc;
        trimRight([body], isLine);
        return concat$1([indentIfDesired(concat$1([hardline$1, body])), hardline$1]);
    }
    catch (error) {
        if (process.env.PRETTIER_DEBUG) {
            throw error;
        }
        // We will wind up here if there is a syntax error in the embedded code. If we throw an error,
        // prettier will try to print the node with the printer. That will fail with a hard-to-interpret
        // error message (e.g. "Unsupported node type", referring to `<script>`).
        // Therefore, fall back on just returning the unformatted text.
        console.error(error);
        return preformattedBody(content);
    }
}
function embedTag(tag, text, path, formatBodyContent, print, isTopLevel, options) {
    var _a;
    const node = path.getNode();
    const content = tag === 'template' ? printRaw(node, text) : getSnippedContent(node);
    const previousComments = node.type === 'Script' || node.type === 'Style'
        ? node.comments
        : [getLeadingComment(path)]
            .filter(Boolean)
            .map((comment) => ({ comment: comment, emptyLineAfter: false }));
    const canFormat = isNodeSupportedLanguage(node) &&
        !isIgnoreDirective((_a = previousComments[previousComments.length - 1]) === null || _a === void 0 ? void 0 : _a.comment) &&
        (tag !== 'template' ||
            options.plugins.some((plugin) => typeof plugin !== 'string' && plugin.parsers && plugin.parsers.pug));
    const body = canFormat
        ? content.trim() !== ''
            ? formatBodyContent(content)
            : content === ''
                ? ''
                : hardline$1
        : preformattedBody(content);
    const openingTag = groupConcat([
        '<',
        tag,
        indent$1(groupConcat([
            ...path.map(printWithPrependedAttributeLine(node, options, print), 'attributes'),
            isBracketSameLine(options) ? '' : dedent$1(softline$1),
        ])),
        '>',
    ]);
    let result = groupConcat([openingTag, body, '</', tag, '>']);
    const comments = [];
    for (const comment of previousComments) {
        comments.push('<!--', comment.comment.data, '-->');
        comments.push(hardline$1);
        if (comment.emptyLineAfter) {
            comments.push(hardline$1);
        }
    }
    if (isTopLevel && options.svelteSortOrder !== 'none') {
        // top level embedded nodes have been moved from their normal position in the
        // node tree. if there is a comment referring to it, it must be recreated at
        // the new position.
        return concat$1([...comments, result, hardline$1]);
    }
    else {
        return comments.length ? concat$1([...comments, result]) : result;
    }
}

function locStart(node) {
    return node.start;
}
function locEnd(node) {
    return node.end;
}
const languages = [
    {
        name: 'svelte',
        parsers: ['svelte'],
        extensions: ['.svelte'],
        vscodeLanguageIds: ['svelte'],
    },
];
const parsers = {
    svelte: {
        hasPragma,
        parse: (text) => {
            try {
                return Object.assign(Object.assign({}, require(`svelte/compiler`).parse(text)), { __isRoot: true });
            }
            catch (err) {
                if (err.start != null && err.end != null) {
                    // Prettier expects error objects to have loc.start and loc.end fields.
                    // Svelte uses start and end directly on the error.
                    err.loc = {
                        start: err.start,
                        end: err.end,
                    };
                }
                throw err;
            }
        },
        preprocess: (text, options) => {
            text = snipScriptAndStyleTagContent(text);
            text = text.trim();
            // Prettier sets the preprocessed text as the originalText in case
            // the Svelte formatter is called directly. In case it's called
            // as an embedded parser (for example when there's a Svelte code block
            // inside markdown), the originalText is not updated after preprocessing.
            // Therefore we do it ourselves here.
            options.originalText = text;
            return text;
        },
        locStart,
        locEnd,
        astFormat: 'svelte-ast',
    },
};
const printers = {
    'svelte-ast': {
        print,
        embed,
    },
};

exports.languages = languages;
exports.options = options;
exports.parsers = parsers;
exports.printers = printers;
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