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improve markdown preview scroll sync (#58852)

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* improve markdown preview scroll sync
This commit is contained in:
SteVen Batten
2018-09-18 15:08:37 -07:00
committed by GitHub
parent 0f4893299a
commit f8f4d3af30
7 changed files with 112 additions and 11 deletions
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24
extensions/markdown-language-features/src/markdownEngine.ts
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@@ -6,6 +6,7 @@
import { MarkdownIt, Token } from 'markdown-it';
import * as path from 'path';
import * as vscode from 'vscode';
import * as crypto from 'crypto';
import { MarkdownContributions } from './markdownExtensions';
import { Slugifier } from './slugify';
import { getUriForLinkWithKnownExternalScheme } from './util/links';
@@ -62,6 +63,7 @@ export class MarkdownEngine {
this.addLineNumberRenderer(this.md, renderName);
}
this.addImageStabilizer(this.md);
this.addFencedRenderer(this.md);
this.addLinkNormalizer(this.md);
@@ -131,6 +133,28 @@ export class MarkdownEngine {
};
}
private addImageStabilizer(md: any): void {
const original = md.renderer.rules.image;
md.renderer.rules.image = (tokens: any, idx: number, options: any, env: any, self: any) => {
const token = tokens[idx];
token.attrJoin('class', 'loading');
const src = token.attrGet('src');
if (src) {
const hash = crypto.createHash('sha256');
hash.update(src);
const imgHash = hash.digest('hex');
token.attrSet('id', `image-hash-${imgHash}`);
}
if (original) {
return original(tokens, idx, options, env, self);
} else {
return self.renderToken(tokens, idx, options, env, self);
}
};
}
private addFencedRenderer(md: any): void {
const original = md.renderer.rules['fenced'];
md.renderer.rules['fenced'] = (tokens: any, idx: number, options: any, env: any, self: any) => {