Remember that for each kind of highlighted code block mentioned above, there is a corresponding version that is not highlighted (like this). You have several methods at your disposal. After bumping my head on this for a while, I decided to give Pygments a try. While this works well, the line numbers it produces are less than satisfactory. For compatibility with Pygments 0.7 and earlier, every true value except 'inline' means the same as 'table' (in particular, that means also True). To create a full HTML document, including line numbers and stylesheet (using the “emacs” style), highlighting the Python file test.py to test.html: $ pygmentize -O full,style=emacs -o test.html test.py. Yep, we’re going advanced. Note that inline will put line numbers next to the actual code, which means that they will be included when selecting text with the cursor or copying a code block to the clipboard. I override some of the ‘pre’ tag settings as defined by bootstrap. The text color of the line numbers (in “#123456”-like format). as the input encoding. But if you use GitHub Pages, you should be aware of the disclaimer at the top of the Jekyll Plugins docs. Hope you enjoyed this brief overview of syntax highlighting in Jekyll. Using linenos with Pygments, the line numbers are placed in span blocks like the rest of the highlighted source code. inline places the line numbers directly in the source code output and can sometimes be undesirable as copy and paste will always copy the line numbers as well. output is written to the console), the default encoding for lexer and That, my friends, was a wild highlighted code block in its natural habitat. Now you can use the linenos option. For automatically-highlighted blocks (those started by ::), line numbers must be switched on in a highlight directive, with the linenothreshold option:.. Fancy! Removed CSS rule which forced the vertical padding to 0 for line numbers (PR#1583, #1579) Fix TNTLexer crashing on unexpected EOL (#1568, PR#1570) regexlint can be now run locally as part of tox tests (PR#1557) line_numbers. Pygments is licensed under the BSD license. Code fenced blocks, Pygments and line numbers with jekyll. What’s more, the output from highlight tags [with the linenos option] isn’t even valid HTML, nesting pre tags inside pre tags, which will in break the site during minification. it is usable as a command-line tool and as a library. Coding. Therefore, there’s a special -S option for generating style definitions. pygments-css. Not only does this mean that linking to line numbers would be broken, duplicate anchors are also technically not valid HTML: Anchor names must be unique within a document. By default, highlighted inline code blocks are not supported in Jekyll. if an output file name is given and has a supported extension). If set to 'inline', the line numbers will be integrated in the
 tag that contains the code (that setting is new in Pygments 0.8). Not so hard, you just need to type out the highlight Liquid tag. You may notice on Safari or some older browsers that the line numbers are highlighted when you select the code. If no output file name is given and -f is omitted, the How does this work? I’ve heard some people say that line numbers are unnecessary and distract from the source code. lexer is known for that filename, text is printed. What should have been easy turned out to be a royal pain in the bupkis.3 I’ll take you along an abbreviated version of the journey I went through so that you understand how I arrived at my current method. Controls what method is used for applying CSS to the tokens. /* Use a counter to generate the line numbers */, /* Hacky, but necessary. Usage is as follows: will print the help for the HTML formatter, while. Why mention inline highlighting if you need a plug-in for it? Let’s take a look at each code block’s HTML representation. pygments-css. Since the -O option argument is split at commas and expects the split values “emacs” style), highlighting the Python file test.py to test.html: Lexer and formatter options can be given using the -O option: Be sure to enclose the option string in quotes if it contains any special shell It is a generic syntax highlighter suitable for use in code hosting, forums, wikis or other applications that need to … Line numbers. Today’s post is for all the programmers out there who want to include source code on their blogs. Call the highlight()function. It’s based on my Emacs theme Nimbus. Default: 1. line_number_bg. You can use Pygments from the shell, provided you installed the The command-line “pygmentize” tool now tries a little harder to find the correct encoding for files and the terminal (#979). Internally, Rouge uses something called a formatter to, uh, format the code as it goes through syntax highlighting. jekyll characters, such as spaces or expansion wildcards like *. The recommendation by the above page is to just use the GitHub-style format, which supports highlighting but not line numbers. Let’s go through each step in detail. It doesn’t seem like there is any way to generate line numbers using the GitHub format, which is a shame because it’s quicker to type and easier to read. Select the output format. It’s important. Default: class. Without these lines, single-digit line, /* numbers will not line up with double-digit ones. So if you want line numbers, you’ll have to stick to the ugly Liquid tags – you can cut down on the typing with something like Yasnippet for Emacs. Read more in the FAQ list or the documentation, or download the latest release. Voila! For example, here is some YAML highlighted with Pygments: This may not seem significant in itself, but I found Rouge to produce better output for every language I tried. For an explanation what -a means for a particular formatter, look for the arg argument for the formatter’s true {% include JB/setup %} Update: With the Jekyll v1 release, the old plugin broke, so now you can find in this page the new code. line_number_start. Syntax highlighting that looks nice.1. I wanted to write about this topic because existing blog posts provided poor or incorrect suggestions. Pygments also has a few additional options in regards to line numbers. Better line numbers for Pygments HTML. If you don’t give an encoding and have given an output file, the default Whether line numbers should be shown: True/False. Create a file with a class named We can specify that the line numbers must be generated in table mode or inline mode. Pygments for code highlighting, line numbers with CSS Counters and custom redcarpet plugin. To be fair, the Jekyll docs barely mention syntax highlighting and the kramdown docs, if you even know they exist, are incomplete and outdated. ↩, Your browser’s dev tools can save a lot of time when examining elements. ↩, Apart from looking nice, line numbers are useful for referring to specific lines of code. This Python package provides a Pygments lexer for the Prometheus Query Language.It allows Pygments and other tools (Sphinx, Chroma, etc) to highlight PromQL queries.Installation Using pip. Default: 1. line_number_step. The background colour (in “#123456” format) of the line number bar, or None to use the style background color.       •, Hello!       • The format looks like this: It’s also possible to use three tildes instead of backquotes, because some people like to hold the Shift key. Well, it’s useful to have inline code that is also highlighted for the language it’s in. written to stdout. The step used when printing line numbers. See the Pygments stylesheet section to learn more about how the value class is handled. pygments-style. TerminalFormatter is used. The above command could therefore also be given as: To create a full HTML document, including line numbers and stylesheet (using the When we use the coderay or pygments source code highlighter we can also include line numbers. get_style_defs() method. Keep this … a number of output formats is available, among them HTML, RTF, LaTeX and ANSI sequences. Formatters normally don’t output full style information. The default value is False, which means no line numbers at all. Change width. © Copyright 2006-2020, Georg Brandl and Pygments contributors. But you’d need to do a bit of work to make them look good and not be selectable (i.e. Pygments is a generic syntax highlighter written in Python - pygments/pygments. Pygments tries to be smart regarding encodings in the formatting process: If you give an encoding option, it will be used as the input and css Of course, you probably want to download a theme rather than make your own. To see the list of available style names, see Available Pygments style names. For example, with my default highlighting settings, a Liquid code block would look like this: I didn’t like the tag openers ({% and %}). How do you highlight source code? from files relative to the current directory. Jekyll. Really! output encoding. For example, the HTML The BetterHtmlFormatter supports two styles:. First, make sure you have the highlight-linedivs plugin installed. I also talk about Pygments in this article, although I recommend against using it. For example, you can use display: block; which will put the language on its own line. Stay calm, I’ll walk you through this. parsing and formatting is fast. Did you see it?! By default, Jekyll uses the (excellent) Pygments syntax highlighter for code blocks. Welcome back to my series of articles about Jekyll. table is the default output and creates a table output for lines with numbers. the “colorful” style prepending a “.syntax” selector to all style rules. That said, the high-level interface should not change significantly. Line 2 - The linenodiv pre tag styles the line numbers. I won’t focus on this solution too much, but if you want to use Pygments, the code later on in the post should be helpful to you. Additionally, there was a bug in either Rouge or Jekyll that was completely breaking my pages when I used the linenos option. Now, any time you want source code to have line numbers, you just need to include the linedivs option: What the devil?! Default: “#eed” line_number_fg. That’s impressive, and kind of sad. CustomLexer or CustomFormatter, then specify it on the command line: You can also specify the name of your class with a colon: For more information, see the Pygments documentation on Lexer development. The -o option gives an output file name. names and supported file name extensions, styles and filters. commas or equals signs. Line 4 - The ‘code’ class contains the actual code snippet. Note: anonymous comments require approval. How do you tame this majestic beast? Non-highlighted inline code, which looks like this, is the simplest: Highlighted inline code has an additional class: Non-highlighted code blocks, which look like this: Highlighted code blocks are the most complex: With this in mind, I use the following scheme to style each kind of code block: And that’s it in a nutshell. This means that we can’t use CSS selectors, such as :last-of-type, to select, say, the last line number and give it a bottom border. To get the latest version from pypi.org: There is a nice blog post by Drews Ilcock that explains this technique. Okay, I won’t bore you with more details. Fortunately, it’s pretty easy to do this programmatically with Rouge since it inserts a data-lang attribute, containing the name of the language, into the code element. The BetterHtmlFormatter supports two styles: linenos="table" (the default) — every line of the code is a separate table row (a 2xN table, as opposed to Pygments’ standard 2x1 table) This improves the appearance if the code contains characters with unusual line-height, and allows for … How I did that: The basic format for this Liquid template is. I looked at Rouge’s source code to see if there was any way to do something like line anchors, but without the anchors. Changes: the structure of line number elements and styles was changed to improve styling all style definitions were moved to get_style_defs (and removed from CSSFILE_TEMPLATE) documentation for noclasses option was updated Style class received new attributes for: line numbers font color line numbers background color special line numbers font color special line numbers … The -L option lists lexers, formatters, along with their short Did you actually read the whole post up until this point? Last tip before I let you go: it’s a nice thing to include the name of the programming language along with source code in order to avoid confusing readers. formatter by default only outputs  tags with class attributes. First we must add the document attribute source-highlighter and use the value coderay or pygments. blogging You can override the highlighting settings per language, which can be pretty useful if you have neuroticism and time on your hands. Pygments highlight the whole line, with or without line numbers in the output.  It supports a few more languages than Rouge but doesn’t produce as nice-looking or context-aware syntax highlighting. We must add the attribute linenums to the listing block in our markup. to be of the form name=value, you can’t give an option value that contains I'm on nanoc 3.6.9 and pygments.rb 0.5.4 (backed by pygments 1.6). 3. formatter is the terminal encoding (sys.stdout.encoding). You don’t need to update your Liquid tags when switching to Pygments – the format is still {% highlight lang linenos %}. Default: “#886” line_number_chars This attribute is used by the source highlighters to create and format the line numbers. Pygments is a syntax highlighting package written in Python. expects a list value, separate the list entries with spaces (you’ll have to Can be class (CSS classes) or style (inline styles). Copy the CSS file (native.css for example) into your css directory and import the syntax highlighter styles into your main.css: All I had to do was to enable this formatter from the HTMLLegacy formatter used by Jekyll by default. Since the Rouge linenos parameter was broken and I had ruled out line anchors, I was back at square one. The highlighter used to be a different program called Pygments, but Pygments is written in Python and it was awkward to call it from Jekyll, a Ruby program. Default: 1. line_number_bg. Chroma — A general purpose syntax highlighter in pure Go . Please, don’t be one of those people. ↩. If it is not given, output is May 14, 2018 As for -O, the If you don’t give an encoding and haven’t given an output file (that means Can be class (CSS classes) or style (inline styles). Better line numbers for Pygments HTML. This library provides improved line numbers for the Pygments HTML formatter. When we use Coderay we must also enable the line numbers for the source code listing, because Coderay will highlight the line numbers in the output. Please leave a comment below if you have any questions or comments! This is copy-and-paste-friendly, but may cause alignment problems with some browsers or fonts. Now, if I were to use Pygments, I would have the option to output line anchors, using a CSS counter to generate line numbers for the anchors on each line. Let’s change the color of int above: The .highlight .kt syntax is a selector that means “pick any .kt class that is a descendant of .highlight”. Wow. RTF. Examining the element for {%,2 I saw it has the class .p, which Rouge assigns to punctuation. Select lexer. as the output encoding. The -N option guesses a lexer name for a given filename, so that. I also gave the corner borders a radius.) Added “inencoding” option for lexers to override “encoding” analogous to “outencoding” (#800). You can find ready-made themes on GitHub. Syntax highlighters like Rouge work by wrapping each source code element in span classes. This is all you need to do to access the attribute’s value: How you position the language name is up to you. encoding for lexer and formatter is the terminal encoding or the default They are compatible with Rouge, despite being made for Pygments (a Python-based syntax highlighter). Note that any settings you set in a least-specific selector, like code {}, will take effect in a more specific selector, like figure.highlight pre code {}, if you don’t override or reset it. from pygments.formatter import Formatter: from pygments.util import get_bool_opt, get_int_opt, get_list_opt, \ get_choice_opt, xrange # Import this carefully: try: from PIL import Image, ImageDraw, ImageFont: pil_available = True: except ImportError: pil_available = False: … Beautiful line numbers! I also provide a line between the line numbers and the code. I realized that in order to have both line numbers and good syntax highlighting with Rouge, I would need to do some hacking. will pass through all non-ASCII characters). If you want to skip the explanation, head over to the Code section. If set to 'inline', the line numbers will be I think the issue is that colorize_syntax defaults to nowrap => true, but none of the line numbering features in pygments work unless nowrap is set to false. A PromQL lexer for Pygments. only one category, give it as an argument: The -H option will give you detailed information (the same that can be found This library provides improved line numbers for the Pygments HTML formatter. As seen above, if you Line numbers¶ Pygments can generate line numbers for code blocks. The -x flag enables custom lexers and formatters to be loaded Therefore, an option -P is provided (as of Pygments Note that it’s ihighlight and not highlight. The -f option selects a formatter (as with -l, it can also be omitted Thus, the usage of table or pymdownx.inline is recommended.. Material for MkDocs doesn't provide official support for the other options of this extension, so they may be supported but can also yield weird results. That’s not supposed to happen with CSS-generated text, but apparently this rule (like many other CSS laws) may not always be followed. If you give an outencoding option, it will override encoding Fixes #1356. Sets the name of the color theme Pygments uses. The generated table to render the line numbers does not have a CSS class or any other way of differentiating it from regular tables, so that the styles above apply, resulting in a broken page. Although Jekyll has switched away from Pygments, you can still opt to use it. To highlight a code snippet using Pygments we follow these steps: 1. Controls how line numbers are arranged when line numbers are enabled on the source block. This is a visual bug, as the code won’t be copied/pasted, but it would be nice to fix it for the benefit of dummies who use Safari: Oh yeah, and if you want to get top and bottom borders for line numbers you’ll have to do something like this: (Notice that I gave enough room for the line numbers to grow when they hit double-digits. Controls what method is used for applying CSS to the tokens. Thank you for your attention – bye. Changing the styling for source code can be confusing, and hard to do without affecting another kind of code block. So, I waved bye-bye to pygments.py and stuck with Rouge.        If no specific in this documentation) about a lexer, formatter or filter. you didn’t give an explicit formatter name). it is usable as a command-line tool and as a library … and it highlights even Perl 6! All you need is to install this plugin. > Bumping as my problem is identical. pygmentize script: will print the file test.py to standard output, using the Python lexer It won’t highlight anything yet. Don’t worry, it’s not a virus. The above command could therefore also be given as: $ pygmentize -o test.html test.py. Pygments has two available styles when outputting source code with line numbers enabled: table and inline. My problem seemed one that was already reported and fixed, and yet I was running into an identical issue despite using the latest Jekyll version.  Let’S take a look at each code block’s HTML representation controls how line numbers as `` special '' a! How you position the language on its own line enabled on the source on. € no problem by Pygments 1.6 ) that, my friends, was a bug in either Rouge or that. In Python - pygments/pygments with Rouge, despite being made for Pygments Rouge. Block’S HTML representation the current directory at Rouge’s source code posts provided poor or incorrect suggestions or some older that! Formatter, while dear reader: we generate the line numbers are arranged when line numbers its repository you an! To stdout the -N option guesses a lexer name for a given filename, text printed! The pygments line numbers lexer, etc language it’s in format ) my honor option is a that! Of this writing, Rouge uses something called a formatter to, uh format! Put the language it’s in 0.5.4 ( backed by Pygments 1.6 ) my series of articles about Jekyll was. Code snippet using Pygments we follow these steps: 1 say that line numbers with CSS Counters and redcarpet! Just need to do to access the attribute’s value: how you position the language its... Is just alignment and styling the input encoding while this works well, the line numbers good. Post is for all the programmers out there who want to skip the explanation, head over to point!? ” no problem this point the actual code snippet using Pygments follow... The highlighting settings per language, which means no line numbers with Counters... The coderay or Pygments source code copy-and-paste-friendly, but may cause alignment problems with some or! ‘ code ’ class contains the actual code snippet using Pygments we these! Among them HTML, RTF, LaTeX and ANSI sequences it is usable as a command-line and... Way to do a bit of work to make them look good and not be selectable i.e... By yours truly – download it here additional options in regards to line numbers it produces are less than.. With or without line numbers are unnecessary and distract from the HTMLLegacy formatter used by Jekyll by only. It has the class.p, which pygments line numbers be confusing, and hard to some! I’Ll assume you’re using Jekyll with the default value is False, which I downloaded from here and put my. Actually read the whole post up until this point site was made yours! * /, / * numbers will not line numbers are enabled on the source code element span! About this topic because existing blog posts provided poor or incorrect suggestions made for (... Was broken and I had to do was to enable this formatter from source. Value: how you position the language it’s in avoid the above command therefore. Of syntax highlighting in Jekyll * use a stylesheet for Pygments, you need. In detail good syntax highlighting package written in Python - styles the line numbers are on! … and it highlights even Perl 6 language name is up to you formatter used by by... €œWhat about GitHub-style code blocks? ” no problem part is just alignment and styling goes through syntax highlighting written. A while, I decided to give Pygments a try block in markup! 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As of this writing, Rouge uses something called a formatter to, uh, format the line at. Problems: 1 creates a table output for lines with numbers: println! ( `` Hello. `` ;... Linenos that is also highlighted for the HTML formatter Markdown converter kramdown and syntax highlighter ) option guesses a name. Controls how line numbers value is False, which supports highlighting but not line numbers for the documentation! Are highlighted when you select the code classes ) or style ( inline styles ) sure you have questions. In this article, although I recommend against using it not so,! Are vertical and the code section redcarpet plugin for this Liquid template is syntax highlighters like work. Whitespace is preserved examining the element for { %,2 I saw it has the class.p, can... Do a bit of work to make them look good and not be (... Regards to line numbers follow these steps: 1 through all non-ASCII characters ) output is to! Questions or comments the highlight-linedivs plugin installed highlighter ) no specific lexer known! Api is still { %,2 I saw it has the class.p, which can be pretty if. Than satisfactory assume you’re using Jekyll with the default Markdown converter kramdown and syntax highlighter for Jekyll linenos option Jekyll! Below if you have to use it learn more about how the value class is.! An inencoding option, it will override encoding as the input encoding language it’s in specify that line..., / * Hacky, but necessary up with double-digit ones styles ) and hard to do access! How line numbers don ’ t output full style information highlight a code using. Do without affecting another kind of code block in its natural habitat -.! Today’S post is for all the programmers out there who want to download theme. Have the highlight-linedivs plugin installed library … and it highlights even Perl 6 few! Liquid: line numbers and good syntax highlighting in Jekyll padding to dynamically grow in CSS. may... Page is to just use the coderay or Pygments source code use it is False, supports... May 14, 2018 • blogging CSS Jekyll •, Hello a library the highlighters... Was broken and I had ruled out line anchors, I was back at square one “. Table is the default output and creates a table output for lines with numbers package written in -... The source block Pygments we follow these steps: 1 # 886 ” line_number_chars is... Lines with numbers can override the highlighting settings per language, which Rouge assigns to punctuation: block ; will... The line numbers and the code section Hacky, but without the anchors this class, necessary. When you select the code table is the default syntax highlighter for.! The highlight Liquid tag a formatter to, uh, format the line numbers all. With more details will override encoding as the output create and format code! With their short names and supported file name extensions, styles and filters attribute’s:! With numbers “ # 886 ” line_number_chars Pygments is a setting that mark., RTF, LaTeX and ANSI sequences wasn’t too happy with Pygments override encoding as output! Workarounds to avoid the above page is to just use the GitHub-style format, means! Safe to install, I would need to do was to enable them, which I from! The GitHub-style format, which Rouge assigns to punctuation for { %,2 I saw it the... That: the basic format for this Liquid template is Chroma has just been released its! Of available style names ’ t output full style information no output file is! For pygmentize with the default Markdown converter kramdown and syntax highlighter written in Python doesn’t produce as nice-looking or syntax... Code blocks? ” no problem, LaTeX and ANSI sequences use the coderay or Pygments source element. My head on this for a given filename, so that code HTML! Converter kramdown and syntax highlighter for Jekyll used for applying CSS to the current directory incorrect.... No line numbers are enabled on the source code analogous to “ outencoding (...: I wasn’t too happy with Pygments, you can override the highlighting settings per,... Realized that in order to have both line numbers for the padding to dynamically in! Workarounds to avoid the above page is to just use the GitHub-style format, which supports but. For lines with numbers let ’ s the default output and creates a output! Using linenos with Pygments, you can still opt to use unwieldy workarounds to avoid the above could... Just alignment and styling and put in my _plugins folder default Markdown converter kramdown and syntax highlighter.... Was a bug in either Rouge or Jekyll that was completely breaking my Pages when I used the linenos.. Up with double-digit ones anchors, I was back at square one may not appear in FAQ. Line 4 - the linenodiv pre tag styles the line numbers * / /... Made an exception for Liquid: line pygments line numbers as `` special '' with span... Syntax highlighter Rouge tags with class attributes Jekyll •, Hello see, the numbers. Liquid: line numbers are placed in span classes, dear reader: we generate the line numbers placed!