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Code Issues Releases Wiki Activity

Fix problem with highlight plugin language brushes

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TiddlyWiki passes the MIME type of the tiddler to highlight.js as the
"language brush", but it turns out that highlight.js doesn't actually
understand MIME types. This commit introduces a configuration mapping
between common MIME types and highlight.js language brushes

Fixes #2535
This commit is contained in:
Jermolene 2016-08-18 09:07:06 +01:00
parent ffae85140f
commit ee9d19d299
4 changed files with 32 additions and 10 deletions
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13
editions/tw5.com/tiddlers/widgets/CodeblockWidget.tid
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@ -1,6 +1,6 @@
caption: codeblock
created: 20151103160200000
modified: 20151103160200000
modified: 20160817175325205
tags: Widgets
title: CodeBlockWidget
type: text/vnd.tiddlywiki
@ -16,9 +16,14 @@ displayed monospace. A language may optionally be specified using the
The content of the `<$codeblock>` widget is ignored.
|!Attribute |!Description|
|code|Contents of the block to render as code|
|language|Programming language for syntax highlighting|
|!Attribute |!Description |
|code |Contents of the block to render as code |
|language |Programming language for syntax highlighting |
The `language` attribute accepts either:
* a Highlight.js language code (see https://highlightjs.org/static/demo/ for a list)
* a MIME type (eg, `text/html` or `image/svg+xml`)
! Examples

9
plugins/tiddlywiki/highlight/TypeMappings.multids Normal file
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@ -0,0 +1,9 @@
title: $:/config/HighlightPlugin/TypeMappings/
text/plain:
application/javascript: javascript
application/json: json
text/css: css
text/html: html
image/svg+xml: xml
text/x-markdown: markdown

19
plugins/tiddlywiki/highlight/highlightblock.js
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@ -12,6 +12,8 @@ Wraps up the fenced code blocks parser for highlight and use in TiddlyWiki5
/*global $tw: false */
"use strict";
var TYPE_MAPPINGS_BASE = "$:/config/HighlightPlugin/TypeMappings/";
var CodeBlockWidget = require("$:/core/modules/widgets/codeblock.js").codeblock;
var hljs = require("$:/plugins/tiddlywiki/highlight/highlight.js");
@ -19,14 +21,19 @@ var hljs = require("$:/plugins/tiddlywiki/highlight/highlight.js");
hljs.configure({tabReplace: " "});
CodeBlockWidget.prototype.postRender = function() {
var domNode = this.domNodes[0];
if($tw.browser && this.document !== $tw.fakeDocument && this.language) {
domNode.className = this.language.toLowerCase();
var domNode = this.domNodes[0],
language = this.language,
tiddler = this.wiki.getTiddler(TYPE_MAPPINGS_BASE + language);
if(tiddler && tiddler.fields.text) {
language = tiddler.fields.text;
}
if($tw.browser && this.document !== $tw.fakeDocument && language) {
domNode.className = language.toLowerCase();
hljs.highlightBlock(domNode);
} else if(!$tw.browser && this.language && this.language.indexOf("/") === -1 ){
} else if(!$tw.browser && language && language.indexOf("/") === -1 ){
try {
domNode.className = this.language.toLowerCase() + " hljs";
domNode.children[0].innerHTML = hljs.fixMarkup(hljs.highlight(this.language, this.getAttribute("code")).value);
domNode.className = language.toLowerCase() + " hljs";
domNode.children[0].innerHTML = hljs.fixMarkup(hljs.highlight(language, this.getAttribute("code")).value);
}
catch(err) {
// Can't easily tell if a language is registered or not in the packed version of hightlight.js,

1
plugins/tiddlywiki/highlight/readme.tid
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@ -45,3 +45,4 @@ The plugin includes support for the following languages (referred to as "brushes
* sql
* xml
You can also specify the language as a MIME content type (eg `text/html` or `text/css`). The mapping is accomplished via mapping tiddlers whose titles start with `$:/config/HighlightPlugin/TypeMappings/`.