mirror of
https://github.com/laurent22/joplin.git
synced 2024-11-27 08:21:03 +02:00
621 lines
18 KiB
JavaScript
621 lines
18 KiB
JavaScript
import stringPadding from 'string-padding';
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const BLOCK_OPEN = "[[BLOCK_OPEN]]";
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const BLOCK_CLOSE = "[[BLOCK_CLOSE]]";
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const NEWLINE = "[[NEWLINE]]";
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const NEWLINE_MERGED = "[[MERGED]]";
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const SPACE = "[[SPACE]]";
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function processMdArrayNewLines(md) {
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while (md.length && md[0] == BLOCK_OPEN) {
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md.shift();
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}
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while (md.length && md[md.length - 1] == BLOCK_CLOSE) {
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md.pop();
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}
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let temp = [];
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let last = '';
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for (let i = 0; i < md.length; i++) { let v = md[i];
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if (isNewLineBlock(last) && isNewLineBlock(v) && last == v) {
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// Skip it
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} else {
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temp.push(v);
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}
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last = v;
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}
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md = temp;
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temp = [];
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last = "";
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for (let i = 0; i < md.length; i++) { let v = md[i];
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if (last == BLOCK_CLOSE && v == BLOCK_OPEN) {
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temp.pop();
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temp.push(NEWLINE_MERGED);
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} else {
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temp.push(v);
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}
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last = v;
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}
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md = temp;
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temp = [];
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last = "";
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for (let i = 0; i < md.length; i++) { let v = md[i];
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if (last == NEWLINE && (v == NEWLINE_MERGED || v == BLOCK_CLOSE)) {
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// Skip it
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} else {
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temp.push(v);
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}
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last = v;
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}
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md = temp;
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// NEW!!!
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temp = [];
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last = "";
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for (let i = 0; i < md.length; i++) { let v = md[i];
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if (last == NEWLINE && (v == NEWLINE_MERGED || v == BLOCK_OPEN)) {
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// Skip it
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} else {
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temp.push(v);
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}
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last = v;
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}
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md = temp;
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if (md.length > 2) {
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if (md[md.length - 2] == NEWLINE_MERGED && md[md.length - 1] == NEWLINE) {
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md.pop();
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}
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}
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let output = '';
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let previous = '';
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let start = true;
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for (let i = 0; i < md.length; i++) { let v = md[i];
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let add = '';
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if (v == BLOCK_CLOSE || v == BLOCK_OPEN || v == NEWLINE || v == NEWLINE_MERGED) {
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add = "\n";
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} else if (v == SPACE) {
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if (previous == SPACE || previous == "\n" || start) {
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continue; // skip
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} else {
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add = " ";
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}
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} else {
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add = v;
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}
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start = false;
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output += add;
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previous = add;
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}
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if (!output.trim().length) return '';
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return output;
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}
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function isWhiteSpace(c) {
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return c == '\n' || c == '\r' || c == '\v' || c == '\f' || c == '\t' || c == ' ';
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}
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// Like QString::simpified(), except that it preserves non-breaking spaces (which
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// Evernote uses for identation, etc.)
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function simplifyString(s) {
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let output = '';
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let previousWhite = false;
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for (let i = 0; i < s.length; i++) {
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let c = s[i];
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let isWhite = isWhiteSpace(c);
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if (previousWhite && isWhite) {
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// skip
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} else {
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output += c;
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}
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previousWhite = isWhite;
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}
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while (output.length && isWhiteSpace(output[0])) output = output.substr(1);
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while (output.length && isWhiteSpace(output[output.length - 1])) output = output.substr(0, output.length - 1);
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return output;
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}
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function collapseWhiteSpaceAndAppend(lines, state, text) {
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if (state.inCode) {
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text = "\t" + text;
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lines.push(text);
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} else {
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// Remove all \n and \r from the left and right of the text
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while (text.length && (text[0] == "\n" || text[0] == "\r")) text = text.substr(1);
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while (text.length && (text[text.length - 1] == "\n" || text[text.length - 1] == "\r")) text = text.substr(0, text.length - 1);
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// Collapse all white spaces to just one. If there are spaces to the left and right of the string
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// also collapse them to just one space.
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let spaceLeft = text.length && text[0] == ' ';
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let spaceRight = text.length && text[text.length - 1] == ' ';
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text = simplifyString(text);
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if (!spaceLeft && !spaceRight && text == "") return lines;
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if (spaceLeft) lines.push(SPACE);
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lines.push(text);
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if (spaceRight) lines.push(SPACE);
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}
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return lines;
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}
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const imageMimeTypes = ["image/cgm", "image/fits", "image/g3fax", "image/gif", "image/ief", "image/jp2", "image/jpeg", "image/jpm", "image/jpx", "image/naplps", "image/png", "image/prs.btif", "image/prs.pti", "image/t38", "image/tiff", "image/tiff-fx", "image/vnd.adobe.photoshop", "image/vnd.cns.inf2", "image/vnd.djvu", "image/vnd.dwg", "image/vnd.dxf", "image/vnd.fastbidsheet", "image/vnd.fpx", "image/vnd.fst", "image/vnd.fujixerox.edmics-mmr", "image/vnd.fujixerox.edmics-rlc", "image/vnd.globalgraphics.pgb", "image/vnd.microsoft.icon", "image/vnd.mix", "image/vnd.ms-modi", "image/vnd.net-fpx", "image/vnd.sealed.png", "image/vnd.sealedmedia.softseal.gif", "image/vnd.sealedmedia.softseal.jpg", "image/vnd.svf", "image/vnd.wap.wbmp", "image/vnd.xiff"];
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function isImageMimeType(m) {
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return imageMimeTypes.indexOf(m) >= 0;
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}
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function addResourceTag(lines, resource, alt = "") {
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let tagAlt = alt == "" ? resource.alt : alt;
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if (!tagAlt) tagAlt = '';
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if (isImageMimeType(resource.mime)) {
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lines.push("![");
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lines.push(tagAlt);
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lines.push("](:/" + resource.id + ")");
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} else {
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lines.push("[");
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lines.push(tagAlt);
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lines.push("](:/" + resource.id + ")");
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}
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return lines;
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}
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function isBlockTag(n) {
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return n=="div" || n=="p" || n=="dl" || n=="dd" || n=="center";
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}
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function isStrongTag(n) {
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return n == "strong" || n == "b";
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}
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function isEmTag(n) {
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return n == "em" || n == "i" || n == "u";
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}
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function isAnchor(n) {
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return n == "a";
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}
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function isIgnoredEndTag(n) {
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return n=="en-note" || n=="en-todo" || n=="span" || n=="body" || n=="html" || n=="font" || n=="br" || n=='hr' || n=='s' || n == 'tbody';
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}
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function isListTag(n) {
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return n == "ol" || n == "ul";
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}
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// Elements that don't require any special treatment beside adding a newline character
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function isNewLineOnlyEndTag(n) {
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return n=="div" || n=="p" || n=="li" || n=="h1" || n=="h2" || n=="h3" || n=="h4" || n=="h5" || n=="dl" || n=="dd" || n=="center";
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}
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function isCodeTag(n) {
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return n == "pre" || n == "code";
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}
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function isNewLineBlock(s) {
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return s == BLOCK_OPEN || s == BLOCK_CLOSE;
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}
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function xmlNodeText(xmlNode) {
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if (!xmlNode || !xmlNode.length) return '';
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return xmlNode[0];
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}
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function enexXmlToMdArray(stream, resources) {
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resources = resources.slice();
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return new Promise((resolve, reject) => {
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let state = {
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inCode: false,
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lists: [],
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anchorAttributes: [],
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};
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let options = {};
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let strict = true;
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var saxStream = require('sax').createStream(strict, options)
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let section = {
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type: 'text',
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lines: [],
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parent: null,
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};
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saxStream.on('error', function(e) {
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reject(e);
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})
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saxStream.on('text', function(text) {
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section.lines = collapseWhiteSpaceAndAppend(section.lines, state, text);
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})
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saxStream.on('opentag', function(node) {
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let n = node.name.toLowerCase();
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if (n == 'en-note') {
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// Start of note
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} else if (isBlockTag(n)) {
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section.lines.push(BLOCK_OPEN);
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} else if (n == 'table') {
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let newSection = {
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type: 'table',
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lines: [],
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parent: section,
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};
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section.lines.push(newSection);
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section = newSection;
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} else if (n == 'tbody') {
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// Ignore it
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} else if (n == 'tr') {
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if (section.type != 'table') throw new Error('Found a <tr> tag outside of a table');
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let newSection = {
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type: 'tr',
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lines: [],
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parent: section,
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isHeader: false,
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}
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section.lines.push(newSection);
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section = newSection;
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} else if (n == 'td' || n == 'th') {
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if (section.type != 'tr') throw new Error('Found a <td> tag outside of a <tr>');
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if (n == 'th') section.isHeader = true;
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let newSection = {
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type: 'td',
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lines: [],
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parent: section,
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};
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section.lines.push(newSection);
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section = newSection;
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} else if (isListTag(n)) {
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section.lines.push(BLOCK_OPEN);
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state.lists.push({ tag: n, counter: 1 });
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} else if (n == 'li') {
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section.lines.push(BLOCK_OPEN);
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if (!state.lists.length) {
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reject("Found <li> tag without being inside a list"); // TODO: could be a warning, but nothing to handle warnings at the moment
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return;
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}
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let container = state.lists[state.lists.length - 1];
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if (container.tag == "ul") {
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section.lines.push("- ");
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} else {
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section.lines.push(container.counter + '. ');
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container.counter++;
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}
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} else if (isStrongTag(n)) {
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section.lines.push("**");
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} else if (n == 's') {
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// Not supported
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} else if (isAnchor(n)) {
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state.anchorAttributes.push(node.attributes);
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section.lines.push('[');
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} else if (isEmTag(n)) {
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section.lines.push("*");
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} else if (n == "en-todo") {
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let x = node.attributes && node.attributes.checked && node.attributes.checked.toLowerCase() == 'true' ? 'X' : ' ';
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section.lines.push('- [' + x + '] ');
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} else if (n == "hr") {
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// Needs to be surrounded by new lines so that it's properly rendered as a line when converting to HTML
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section.lines.push(NEWLINE);
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section.lines.push('----------------------------------------');
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section.lines.push(NEWLINE);
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section.lines.push(NEWLINE);
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} else if (n == "h1") {
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section.lines.push(BLOCK_OPEN); section.lines.push("# ");
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} else if (n == "h2") {
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section.lines.push(BLOCK_OPEN); section.lines.push("## ");
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} else if (n == "h3") {
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section.lines.push(BLOCK_OPEN); section.lines.push("### ");
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} else if (n == "h4") {
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section.lines.push(BLOCK_OPEN); section.lines.push("#### ");
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} else if (n == "h5") {
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section.lines.push(BLOCK_OPEN); section.lines.push("##### ");
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} else if (n == "h6") {
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section.lines.push(BLOCK_OPEN); section.lines.push("###### ");
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} else if (isCodeTag(n)) {
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section.lines.push(BLOCK_OPEN);
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state.inCode = true;
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} else if (n == "br") {
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section.lines.push(NEWLINE);
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} else if (n == "en-media") {
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const hash = node.attributes.hash;
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let resource = null;
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for (let i = 0; i < resources.length; i++) {
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let r = resources[i];
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if (r.id == hash) {
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resource = r;
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resources.splice(i, 1);
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break;
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}
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}
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if (!resource) {
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// This is a bit of a hack. Notes sometime have resources attached to it, but those <resource> tags don't contain
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// an "objID" tag, making it impossible to reference the resource. However, in this case the content of the note
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// will contain a corresponding <en-media/> tag, which has the ID in the "hash" attribute. All this information
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// has been collected above so we now set the resource ID to the hash attribute of the en-media tags. Here's an
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// example of note that shows this problem:
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// <?xml version="1.0" encoding="UTF-8"?>
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// <!DOCTYPE en-export SYSTEM "http://xml.evernote.com/pub/evernote-export2.dtd">
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// <en-export export-date="20161221T203133Z" application="Evernote/Windows" version="6.x">
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// <note>
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// <title>Commande</title>
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// <content>
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// <![CDATA[
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// <?xml version="1.0" encoding="UTF-8"?>
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// <!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml2.dtd">
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// <en-note>
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// <en-media alt="your QR code" hash="216a16a1bbe007fba4ccf60b118b4ccc" type="image/png"></en-media>
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// </en-note>
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// ]]>
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// </content>
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// <created>20160921T203424Z</created>
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// <updated>20160921T203438Z</updated>
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// <note-attributes>
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// <reminder-order>20160902T140445Z</reminder-order>
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// <reminder-done-time>20160924T101120Z</reminder-done-time>
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// </note-attributes>
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// <resource>
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// <data encoding="base64">........</data>
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// <mime>image/png</mime>
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// <width>150</width>
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// <height>150</height>
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// </resource>
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// </note>
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// </en-export>
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let found = false;
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for (let i = 0; i < resources.length; i++) {
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let r = resources[i];
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if (!r.id) {
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r.id = hash;
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resources[i] = r;
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found = true;
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break;
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}
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}
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if (!found) {
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console.warn('Hash with no associated resource: ' + hash);
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}
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} else {
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// If the resource does not appear among the note's resources, it
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// means it's an attachement. It will be appended along with the
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// other remaining resources at the bottom of the markdown text.
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if (!!resource.id) {
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section.lines = addResourceTag(section.lines, resource, node.attributes.alt);
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}
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}
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} else if (n == "span" || n == "font") {
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// Ignore
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} else {
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console.warn("Unsupported start tag: " + n);
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}
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})
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saxStream.on('closetag', function(n) {
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if (n == 'en-note') {
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// End of note
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} else if (isNewLineOnlyEndTag(n)) {
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section.lines.push(BLOCK_CLOSE);
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} else if (n == 'td' || n == 'th') {
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section = section.parent;
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} else if (n == 'tr') {
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section = section.parent;
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} else if (n == 'table') {
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section = section.parent;
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} else if (isIgnoredEndTag(n)) {
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// Skip
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} else if (isListTag(n)) {
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section.lines.push(BLOCK_CLOSE);
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state.lists.pop();
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} else if (isStrongTag(n)) {
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section.lines.push("**");
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} else if (isEmTag(n)) {
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section.lines.push("*");
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} else if (isCodeTag(n)) {
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state.inCode = false;
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section.lines.push(BLOCK_CLOSE);
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} else if (isAnchor(n)) {
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let attributes = state.anchorAttributes.pop();
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let url = attributes && attributes.href ? attributes.href : '';
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if (section.lines.length < 1) throw new Error('Invalid anchor tag closing'); // Sanity check, but normally not possible
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// When closing the anchor tag, check if there's is any text content. If not
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// put the URL as is (don't wrap it in [](url)). The markdown parser, using
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// GitHub flavour, will turn this URL into a link. This is to generate slightly
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// cleaner markdown.
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let previous = section.lines[section.lines.length - 1];
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if (previous == '[') {
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section.lines.pop();
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section.lines.push(url);
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} else if (!previous || previous == url) {
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section.lines.pop();
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section.lines.pop();
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section.lines.push(url);
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} else {
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section.lines.push('](' + url + ')');
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}
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} else if (isListTag(n)) {
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section.lines.push(BLOCK_CLOSE);
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state.lists.pop();
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} else if (n == "en-media") {
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// Skip
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} else if (isIgnoredEndTag(n)) {
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// Skip
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} else {
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console.warn("Unsupported end tag: " + n);
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}
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})
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saxStream.on('attribute', function(attr) {
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})
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saxStream.on('end', function() {
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resolve({
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content: section,
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resources: resources,
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});
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})
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stream.pipe(saxStream);
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});
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}
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function setTableCellContent(table) {
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if (!table.type == 'table') throw new Error('Only for tables');
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for (let trIndex = 0; trIndex < table.lines.length; trIndex++) {
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const tr = table.lines[trIndex];
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for (let tdIndex = 0; tdIndex < tr.lines.length; tdIndex++) {
|
|
let td = tr.lines[tdIndex];
|
|
td.content = processMdArrayNewLines(td.lines);
|
|
td.content = td.content.replace(/\n\n\n\n\n/g, ' ');
|
|
td.content = td.content.replace(/\n\n\n\n/g, ' ');
|
|
td.content = td.content.replace(/\n\n\n/g, ' ');
|
|
td.content = td.content.replace(/\n\n/g, ' ');
|
|
td.content = td.content.replace(/\n/g, ' ');
|
|
}
|
|
}
|
|
|
|
return table;
|
|
}
|
|
|
|
function cellWidth(cellText) {
|
|
const lines = cellText.split("\n");
|
|
let maxWidth = 0;
|
|
for (let i = 0; i < lines.length; i++) {
|
|
const line = lines[i];
|
|
if (line.length > maxWidth) maxWidth = line.length;
|
|
}
|
|
return maxWidth;
|
|
}
|
|
|
|
function colWidths(table) {
|
|
let output = [];
|
|
for (let trIndex = 0; trIndex < table.lines.length; trIndex++) {
|
|
const tr = table.lines[trIndex];
|
|
for (let tdIndex = 0; tdIndex < tr.lines.length; tdIndex++) {
|
|
const td = tr.lines[tdIndex];
|
|
const w = cellWidth(td.content);
|
|
if (output.length <= tdIndex) output.push(0);
|
|
if (w > output[tdIndex]) output[tdIndex] = w;
|
|
}
|
|
}
|
|
return output;
|
|
}
|
|
|
|
function drawTable(table, colWidths) {
|
|
// | First Header | Second Header |
|
|
// | ------------- | ------------- |
|
|
// | Content Cell | Content Cell |
|
|
// | Content Cell | Content Cell |
|
|
|
|
// There must be at least 3 dashes separating each header cell.
|
|
// https://gist.github.com/IanWang/28965e13cdafdef4e11dc91f578d160d#tables
|
|
const minColWidth = 3;
|
|
let lines = [];
|
|
let headerDone = false;
|
|
for (let trIndex = 0; trIndex < table.lines.length; trIndex++) {
|
|
const tr = table.lines[trIndex];
|
|
const isHeader = tr.isHeader;
|
|
let line = [];
|
|
let headerLine = [];
|
|
let emptyHeader = null;
|
|
for (let tdIndex = 0; tdIndex < colWidths.length; tdIndex++) {
|
|
const width = Math.max(minColWidth, colWidths[tdIndex]);
|
|
const cell = tr.lines[tdIndex] ? tr.lines[tdIndex].content : '';
|
|
line.push(stringPadding(cell, width, ' ', stringPadding.RIGHT));
|
|
|
|
if (!headerDone) {
|
|
if (!isHeader) {
|
|
if (!emptyHeader) emptyHeader = [];
|
|
let h = stringPadding(' ', width, ' ', stringPadding.RIGHT);
|
|
if (!width) h = '';
|
|
emptyHeader.push(h);
|
|
}
|
|
headerLine.push('-'.repeat(width));
|
|
}
|
|
}
|
|
|
|
if (emptyHeader) {
|
|
lines.push('| ' + emptyHeader.join(' | ') + ' |');
|
|
lines.push('| ' + headerLine.join(' | ') + ' |');
|
|
headerDone = true;
|
|
}
|
|
|
|
lines.push('| ' + line.join(' | ') + ' |');
|
|
|
|
if (!headerDone) {
|
|
lines.push('| ' + headerLine.join(' | ') + ' |');
|
|
headerDone = true;
|
|
}
|
|
}
|
|
|
|
return lines.join('<<<<:D>>>>' + NEWLINE + '<<<<:D>>>>').split('<<<<:D>>>>');
|
|
}
|
|
|
|
async function enexXmlToMd(stream, resources) {
|
|
let result = await enexXmlToMdArray(stream, resources);
|
|
|
|
let mdLines = [];
|
|
|
|
for (let i = 0; i < result.content.lines.length; i++) {
|
|
let line = result.content.lines[i];
|
|
if (typeof line === 'object') { // A table
|
|
let table = setTableCellContent(line);
|
|
//console.log(require('util').inspect(table, false, null))
|
|
const cw = colWidths(table);
|
|
const tableLines = drawTable(table, cw);
|
|
mdLines.push(BLOCK_OPEN);
|
|
mdLines = mdLines.concat(tableLines);
|
|
mdLines.push(BLOCK_CLOSE);
|
|
} else { // an actual line
|
|
mdLines.push(line);
|
|
}
|
|
}
|
|
|
|
let firstAttachment = true;
|
|
for (let i = 0; i < result.resources.length; i++) {
|
|
let r = result.resources[i];
|
|
if (firstAttachment) mdLines.push(NEWLINE);
|
|
mdLines.push(NEWLINE);
|
|
mdLines = addResourceTag(mdLines, r, r.filename);
|
|
firstAttachment = false;
|
|
}
|
|
|
|
return processMdArrayNewLines(mdLines);
|
|
}
|
|
|
|
export { enexXmlToMd, processMdArrayNewLines, NEWLINE, addResourceTag }; |