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'use strict';
const parseAttr = require('md-attr-parser');
const htmlElemAttr = require('html-element-attributes');
const DOMEventHandler = [
'onabort', 'onautocomplete', 'onautocompleteerror',
'onblur', 'oncancel', 'oncanplay',
'oncanplaythrough', 'onchange', 'onclick',
'onclose', 'oncontextmenu', 'oncuechange',
'ondblclick', 'ondrag', 'ondragend',
'ondragenter', 'ondragexit', 'ondragleave',
'ondragover', 'ondragstart', 'ondrop',
'ondurationchange', 'onemptied', 'onended',
'onerror', 'onfocus', 'oninput',
'oninvalid', 'onkeydown', 'onkeypress',
'onkeyup', 'onload', 'onloadeddata',
'onloadedmetadata', 'onloadstart', 'onmousedown',
'onmouseenter', 'onmouseleave', 'onmousemove',
'onmouseout', 'onmouseover', 'onmouseup',
'onmousewheel', 'onpause', 'onplay',
'onplaying', 'onprogress', 'onratechange',
'onreset', 'onresize', 'onscroll',
'onseeked', 'onseeking', 'onselect',
'onshow', 'onsort', 'onstalled',
'onsubmit', 'onsuspend', 'ontimeupdate',
'ontoggle', 'onvolumechange', 'onwaiting',
];
/* Table convertion between type and HTML tagName */
const convTypeTag = {
image: 'img',
link: 'a',
heading: 'h1',
strong: 'strong',
emphasis: 'em',
delete: 's',
inlineCode: 'code',
};
/* TODO :
* - [~] fencedCode // require('./tokenize/code-fenced'),
- [x] atxHeading //require('./tokenize/heading-atx'),
- [ ] setextHeading //require('./tokenize/heading-setext'),
- [~] table //require('./tokenize/table'),
- [x] link //require('./tokenize/link'),
- [x] strong //require('./tokenize/strong'),
- [x] emphasis //require('./tokenize/emphasis'),
- [x] deletion //require('./tokenize/delete'),
- [x] code //require('./tokenize/code-inline'),
Tests with ava
xo as linter
*/
function tokenizeGenerator(prefix, oldParser, config) {
function token(eat, value, silent) {
const self = this;
let eaten = oldParser.call(self, eat, value, silent);
let index = 0;
let parsedAttr;
const {length} = value;
if (!eaten || !eaten.position) {
return undefined;
}
const type = convTypeTag[eaten.type];
index = eaten.position.end.offset - eaten.position.start.offset;
if (index + prefix.length < length && value.charAt(index + prefix.length) === '{') {
parsedAttr = parseAttr(value, index + prefix.length);
}
if (parsedAttr) {
if (config.scope && config.scope !== 'none') {
const filtredProp = filterAttributes(parsedAttr.prop, config, type);
if (filtredProp !== {}) {
if (eaten.data) {
eaten.data.hProperties = filtredProp;
} else {
eaten.data = {hProperties: filtredProp};
}
}
}
eaten = eat(prefix + parsedAttr.eaten)(eaten);
}
return eaten;
}
return token;
}
function filterAttributes(prop, config, type) {
const {scope} = config;
const {allowDangerousDOMEventHandlers} = config;
if (scope === 'specific') {
Object.getOwnPropertyNames(prop).forEach(p => {
if ((!htmlElemAttr[type] || htmlElemAttr[type].indexOf(p) < 0) &&
htmlElemAttr['*'].indexOf(p) < 0 &&
DOMEventHandler.indexOf(p) < 0) {
delete prop[p];
}
});
} else if (scope === 'global') {
Object.getOwnPropertyNames(prop).forEach(p => {
if (htmlElemAttr['*'].indexOf(p) < 0 &&
DOMEventHandler.indexOf(p) < 0) {
delete prop[p];
}
});
}
if (!allowDangerousDOMEventHandlers) {
Object.getOwnPropertyNames(prop).forEach(p => {
if (DOMEventHandler.indexOf(p) >= 0) {
delete prop[p];
}
});
}
return prop;
}
module.exports = remarkAttr;
function remarkAttr(userConfig) {
const parser = this.Parser;
const defaulConfig = {
allowDangerousDOMEventHandlers: false,
elements: ['link', 'image', 'header'],
extends: [],
scope: 'specific',
};
const config = {...defaulConfig, ...userConfig};
if (!isRemarkParser(parser)) {
throw new Error('Missing parser to attach `remark-attr` [link] (to)');
}
const tokenizers = parser.prototype.inlineTokenizers;
const tokenizersBlock = parser.prototype.blockTokenizers;
const oldLink = tokenizers.link;
const oldStrong = tokenizers.strong;
const oldEmphasis = tokenizers.emphasis;
const oldDeletion = tokenizers.deletion;
const oldCodeInline = tokenizers.code;
const oldAtxHeader = tokenizersBlock.atxHeading;
const linkTokenize = tokenizeGenerator('', oldLink, config);
linkTokenize.locator = tokenizers.link.locator;
const strongTokenize = tokenizeGenerator('', oldStrong, config);
strongTokenize.locator = tokenizers.strong.locator;
const emphasisTokenize = tokenizeGenerator('', oldEmphasis, config);
emphasisTokenize.locator = tokenizers.emphasis.locator;
const deleteTokenize = tokenizeGenerator('', oldDeletion, config);
deleteTokenize.locator = tokenizers.deletion.locator;
const codeInlineTokenize = tokenizeGenerator('', oldCodeInline, config);
codeInlineTokenize.locator = tokenizers.code.locator;
tokenizersBlock.atxHeading = tokenizeGenerator('\n', oldAtxHeader, config);
tokenizers.link = linkTokenize;
tokenizers.strong = strongTokenize;
tokenizers.emphasis = emphasisTokenize;
tokenizers.deletion = deleteTokenize;
tokenizers.code = codeInlineTokenize;
}
function isRemarkParser(parser) {
return Boolean(
parser &&
parser.prototype &&
parser.prototype.inlineTokenizers &&
parser.prototype.inlineTokenizers.link &&
parser.prototype.inlineTokenizers.link.locator
);
}
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