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joplin/ReactNativeClient/lib/joplin-renderer/MdToHtml/rules/html_image.js
2020-08-18 21:52:00 +01:00

54 lines
1.8 KiB
JavaScript

// const Resource = require('lib/models/Resource.js');
const htmlUtils = require('../../htmlUtils.js');
const utils = require('../../utils');
function renderImageHtml(before, src, after, ruleOptions) {
const r = utils.imageReplacement(ruleOptions.ResourceModel, src, ruleOptions.resources, ruleOptions.resourceBaseUrl);
if (typeof r === 'string') return r;
if (r) return `<img ${before} ${htmlUtils.attributesHtml(r)} ${after}/>`;
return `[Image: ${src}]`;
}
function installRule(markdownIt, mdOptions, ruleOptions) {
const Resource = ruleOptions.ResourceModel;
const htmlBlockDefaultRender =
markdownIt.renderer.rules.html_block ||
function(tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options);
};
const htmlInlineDefaultRender =
markdownIt.renderer.rules.html_inline ||
function(tokens, idx, options, env, self) {
return self.renderToken(tokens, idx, options);
};
const imageRegex = /<img(.*?)src=["'](.*?)["'](.*?)>/gi;
const handleImageTags = function(defaultRender) {
return function(tokens, idx, options, env, self) {
const token = tokens[idx];
const content = token.content;
if (!content.match(imageRegex)) return defaultRender(tokens, idx, options, env, self);
return content.replace(imageRegex, (v, before, src, after) => {
if (!Resource.isResourceUrl(src)) return `<img${before}src="${src}"${after}>`;
return renderImageHtml(before, src, after, ruleOptions);
});
};
};
// It seems images sometimes are inline, sometimes a block
// to make sure they both render correctly.
markdownIt.renderer.rules.html_block = handleImageTags(htmlBlockDefaultRender);
markdownIt.renderer.rules.html_inline = handleImageTags(htmlInlineDefaultRender);
}
module.exports = function(context, ruleOptions) {
return function(md, mdOptions) {
installRule(md, mdOptions, ruleOptions);
};
};