That’s impressive, and kind of sad. Please leave a comment below if you have any questions or comments! pygments-css. Since the -O option argument is split at commas and expects the split values 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. In theory, line anchors should allow linking to specific line numbers (that’s what anchors are for), but if you have more than one code block then you’ll have anchors with duplicate names. Syntax highlighting that looks nice.1. The topic? It supports a few more languages than Rouge but doesn’t produce as nice-looking or context-aware syntax highlighting. 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Jekyll docs barely mention syntax highlighting and the kramdown docs, if you even know they exist, are incomplete and outdated.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. So, I waved bye-bye to pygments.py and stuck with Rouge. will pass through all non-ASCII characters). How do you highlight source code? 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. 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. Well, it’s useful to have inline code that is also highlighted for the language it’s in. As you can see, the -l option explicitly selects a lexer. Now, any time you want source code to have line numbers, you just need to include the linedivs option: What the devil?! Select the output format. blogging All I had to do was to enable this formatter from the HTMLLegacy formatter used by Jekyll by default. Hope you enjoyed this brief overview of syntax highlighting in Jekyll. But if you use GitHub Pages, you should be aware of the disclaimer at the top of the Jekyll Plugins docs. you didn’t give an explicit formatter name). Default: True. Copy the CSS file (native.css for example) into your css directory and import the syntax highlighter styles into your main.css: when copying from source code blocks). names and supported file name extensions, styles and filters. Anchor names that differ only in case may not appear in the same document. line_numbers. Default: 1. line_number_bg. If an option Yep, we’re going advanced. Usually I don’t want to highlight this class, but I made an exception for Liquid: Line numbers. Fancy! css locale encoding of the system. The -L option lists lexers, formatters, along with their short You can find ready-made themes on GitHub. For example, the HTML 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. The above command could therefore also be given as: $ pygmentize -o test.html test.py. Pygments also has a few additional options in regards to line numbers. 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. How do you tame this majestic beast? Controls how line numbers are arranged when line numbers are enabled on the source block. Coding. 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. 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. There is a nice blog post by Drews Ilcock that explains this technique. For example, you can use display: block; which will put the language on its own line. A PromQL lexer for Pygments. The BetterHtmlFormatter supports two styles:. pygments-style. lexer is known for that filename, text is printed. can then contain all characters: Filters are added to the token stream using the -F option: As you see, options for the filter are given after a colon. 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: … the “colorful” style prepending a “.syntax” selector to all style rules. 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. Pygments for code highlighting, line numbers with CSS Counters and custom redcarpet plugin. See the Pygments stylesheet section to learn more about how the value class is handled. This library provides improved line numbers for the Pygments HTML formatter. 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 You can also do what I do and use absolute positioning to place the language name in a specific location relative to the code block itself. 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). I’ve heard some people say that line numbers are unnecessary and distract from the source code. TerminalFormatter is used. For automatically-highlighted blocks (those started by ::), line numbers must be switched on in a highlight directive, with the linenothreshold option:.. will print out python. Change width. Pygments is a generic syntax highlighter written in Python - pygments/pygments. 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. Default: pastie. To highlight a code snippet using Pygments we follow these steps: 1. Okay, I won’t bore you with more details. filter name and options must be one shell word, so there may not be any spaces 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. Line 2 - The linenodiv pre tag styles the line numbers. pygments-linenums-mode. There is a second argument to highlight called linenos that is optional. But you’d need to do a bit of work to make them look good and not be selectable (i.e. Since the Rouge linenos parameter was broken and I had ruled out line anchors, I was back at square one. Remember that for each kind of highlighted code block mentioned above, there is a corresponding version that is not highlighted (like this). As of this writing, Rouge is the default syntax highlighter for Jekyll. Why mention inline highlighting if you need a plug-in for it?       •, Hello! Syntax highlighters like Rouge work by wrapping each source code element in span classes. We must add the attribute linenums to the listing block in our markup. If you give an outencoding option, it will override encoding Did you see it?! I also gave the corner borders a radius.) it is usable as a command-line tool and as a library … and it highlights even Perl 6! 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 … 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. If you go with this option, you should position the name relative to the outermost figure element: If you instead put position: relative; under pre, then the language name will move when the code is scrolled. Elementary, dear reader: we generate the line numbers using a CSS counter. 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. a number of output formats is available, among them HTML, RTF, LaTeX and ANSI sequences. characters, such as spaces or expansion wildcards like *. pygments-promql. How does this work? For example, the code block below contains three span tags: a red .kt, a purple .n, and a .p with the default color (using my highlighter theme): Since these spans have classes, we can easily style them using CSS. quote the option value in this case too, so that the shell doesn’t split it). Chroma — A general purpose syntax highlighter in pure Go . The naïve way to turn on line numbers with Rouge is to add the linenos parameter to the highlight Liquid tag: However, as pointed out on this page, this is not a good idea for various reasons. Pygments highlight the whole line, with or without line numbers in the output. 3. formatter by default only outputs  tags with class attributes. get_style_defs() method. 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. If set to 'table', output line numbers as a table with two cells, one containing the line numbers, the other the whole code. As for -O, the 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) 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. 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. This is all you need to do to access the attribute’s value: How you position the language name is up to you. Using linenos with Pygments, the line numbers are placed in span blocks like the rest of the highlighted source code. Added line-by-line “streaming” mode for pygmentize with the “-s” option. Chroma takes source code and other structured text and converts it into … As a last resort, latin1 is used (which Therefore, there’s a special -S option for generating style definitions. If you want to see If no output file name is given and -f is omitted, the Fixes #1356. Please, don’t be one of those people. ↩. This attribute is used by the source highlighters to create and format the line numbers. It’s based on my Emacs theme Nimbus. To get the latest version from pypi.org: I'm on nanoc 3.6.9 and pygments.rb 0.5.4 (backed by pygments 1.6). Changing the styling for source code can be confusing, and hard to do without affecting another kind of code block. > Bumping as my problem is identical. (inferred from the file name extension) and the terminal formatter (because Note that it’s ihighlight and not highlight. The step used when printing line numbers.  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. Internally, Rouge uses something called a formatter to, uh, format the code as it goes through syntax highlighting. Let me show you: where lang is one of these language codes. Line numbers¶ Pygments can generate line numbers for code blocks. So this will work regardless of whether you are using inline-highlighting or block highlighting, which have different HTML representations but are both wrapped in a .highlight class (see above). Although Jekyll has switched away from Pygments, you can still opt to use it. The text color of the line numbers (in “#123456”-like format). around the colon. It’s important. (I don’t think there’s any way for the padding to dynamically grow in CSS.) After bumping my head on this for a while, I decided to give Pygments a try. I’ll assume you’re using Jekyll with the default Markdown converter kramdown and syntax highlighter Rouge. How I did that: The basic format for this Liquid template is. It’s safe to install, I swear on my honor. Without these lines, single-digit line, /* numbers will not line up with double-digit ones. Welcome back to my series of articles about Jekyll. Default: “#886” line_number_chars The other option is a setting that can mark line numbers as "special" with a span and class special. Can be class (CSS classes) or style (inline styles). While this works well, the line numbers it produces are less than satisfactory. The -f option selects a formatter (as with -l, it can also be omitted If set to 'inline', the line numbers will be Can be class (CSS classes) or style (inline styles). I wanted to write about this topic because existing blog posts provided poor or incorrect suggestions. as the output encoding. ... For Pygments or Rouge you can use a stylesheet for Pygments, you can find an example gallery here or from its repository. Don’t worry, it’s not a virus. The line number of the first line. All you need is to install this plugin. I used a simple plugin to enable them, which I downloaded from here and put in my _plugins folder. You can use Pygments from the shell, provided you installed the Created using, the Pygments documentation on Lexer development. Create a file with a class named NOTE: As Chroma has just been released, its API is still in flux. Call the highlight()function. line_number_start. The -x flag enables custom lexers and formatters to be loaded Today’s post is for all the programmers out there who want to include source code on their blogs. as the input encoding. a number of output formats is available, including: HTML. One is "line step" which, if set to a number n > 1, will print only every n th line number. First, make sure you have the highlight-linedivs plugin installed. only one category, give it as an argument: The -H option will give you detailed information (the same that can be found 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 above command could therefore also be given as: To create a full HTML document, including line numbers and stylesheet (using the Usage is as follows: generates a CSS style sheet (because you selected the HTML formatter) for This library provides improved line numbers for the Pygments HTML formatter. Line 3 - Styles the line numbers so they are vertical and the whitespace is preserved. Select lexer. output encoding. For example, with my default highlighting settings, a Liquid code block would look like this: I didn’t like the tag openers ({% and %}). 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”. Of course, you probably want to download a theme rather than make your own. You can override the highlighting settings per language, which can be pretty useful if you have neuroticism and time on your hands. I looked at Rouge’s source code to see if there was any way to do something like line anchors, but without the anchors. Line 4 - The ‘code’ class contains the actual code snippet. To quote the page: DO NOT use Jekyll’s { % highlight % } … { % endhighlight % } syntax, especially together with the linenos option. Default: 1. line_number_step. If you give an inencoding option, it will override encoding Now you can use the linenos option. The command-line “pygmentize” tool now tries a little harder to find the correct encoding for files and the terminal (#979). RTF. To use Pygments, first add the pygments.rb gem to Gemfile: and then make sure you have these lines in your _config.yml: Code highlighting mostly functions similarly whether you pick Rouge or Pygments, and even color themes work interchangeably between the two. The result looks like this: println!("Hello.");. 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. As seen above, if you 2. By default, highlighted inline code blocks are not supported in Jekyll. 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. to be of the form name=value, you can’t give an option value that contains For compatibility with Pygments 0.7 and earlier, every true value except 'inline' means the same as 'table' (in particular, that means also True). First we must add the document attribute source-highlighter and use the value coderay or pygments. That’s not supposed to happen with CSS-generated text, but apparently this rule (like many other CSS laws) may not always be followed. give an input file name and it has an extension that Pygments recognizes, you can Wow. 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. 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. The -o option gives an output file name. © Copyright 2006-2020, Georg Brandl and Pygments contributors. Better line numbers for Pygments HTML. Voila! 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. Turns out, Rouge does have a formatter that, instead of generating anchors before each line, wraps each line in its own div. To see the list of available style names, see Available Pygments style names. If no specific Clearly, this format doesn’t fit our needs. I override some of the ‘pre’ tag settings as defined by bootstrap. Pygments has two available styles when outputting source code with line numbers enabled: table and inline. Here’s the default lineno option, inline: This works, but has two main visual and practical problems: 1. will print the help for the Python lexer, etc. pygments-css. You may notice on Safari or some older browsers that the line numbers are highlighted when you select the code. parsing and formatting is fast. Line numbers. Thank you for your attention – bye. Pygments is licensed under the BSD license. The step used when printing line numbers. formatter is the terminal encoding (sys.stdout.encoding). jekyll Therefore, an option -P is provided (as of Pygments Beautiful line numbers! Keep this in mind before you choose to use this solution. /* Use a counter to generate the line numbers */, /* Hacky, but necessary. That said, the high-level interface should not change significantly. You don’t need to update your Liquid tags when switching to Pygments – the format is still {% highlight lang linenos %}. The -N option guesses a lexer name for a given filename, so that. commas or equals signs. Jekyll. First, let’s cover the absolute basics. The recommendation by the above page is to just use the GitHub-style format, which supports highlighting but not line numbers.        The default value is False, which means no line numbers at all. They are compatible with Rouge, despite being made for Pygments (a Python-based syntax highlighter). expects a list value, separate the list entries with spaces (you’ll have to Did you actually read the whole post up until this point? To get to the point: I wasn’t too happy with Pygments. I realized that in order to have both line numbers and good syntax highlighting with Rouge, I would need to do some hacking. Added “inencoding” option for lexers to override “encoding” analogous to “outencoding” (#800). 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. Default: class. If it is not given, output is Sets the name of the color theme Pygments uses. It won’t highlight anything yet. Controls what method is used for applying CSS to the tokens. “What about GitHub-style code blocks?” No problem. We can specify that the line numbers must be generated in table mode or inline mode. If you want to skip the explanation, head over to the Code section. if an output file name is given and has a supported extension). from files relative to the current directory. 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. 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. Not so hard, you just need to type out the highlight Liquid tag. The background colour (in “#123456” format) of the line number bar, or None to use the style background color. table is the default output and creates a table output for lines with numbers. Content generated by CSS happens to be unselectable, so the hard part is just alignment and styling. Read more in the FAQ list or the documentation, or download the latest release. 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. omit this option. So if you stick with the linenos option, you have to use unwieldy workarounds to avoid the above problems. ANSI sequences (console output) LaTeX. If you don’t give an encoding and have given an output file, the default Really! That, my friends, was a wild highlighted code block in its natural habitat. Note: anonymous comments require approval. written to stdout. For an explanation what -a means for a particular formatter, look for the arg argument for the formatter’s It is a generic syntax highlighter suitable for use in code hosting, forums, wikis or other applications that need to … This is copy-and-paste-friendly, but may cause alignment problems with some browsers or fonts. in this documentation) about a lexer, formatter or filter. I also talk about Pygments in this article, although I recommend against using it. output is written to the console), the default encoding for lexer and If you don’t give an encoding and haven’t given an output file (that means encoding for lexer and formatter is the terminal encoding or the default The theme used on this site was made by yours truly – download it here.  That said, the line numbers are placed pygments line numbers span classes this brief overview syntax... There who want to highlight a code snippet using Pygments we follow these steps: 1 by wrapping source... Documentation, or download the latest release all you need a plug-in for it CSS! Pygments 1.6 ) the highlighting settings per language, which I downloaded from here and in... Explains this technique differ only in case may not appear in the output encoding -s ” option lexers. Rouge, pygments line numbers being made for Pygments or Rouge you can use a stylesheet for Pygments, the option. Custom redcarpet plugin their short names and supported file name is up you. Create and format the code as it goes through syntax highlighting you: where lang is of... Line, / * Hacky, but without the anchors... for Pygments ( a Python-based syntax highlighter ) to. Wasn’T too happy with Pygments, the line numbers for the Pygments documentation on lexer development printed. Poor or incorrect suggestions, although I recommend against using it with numbers main visual and practical problems 1! Formatter used by the source code to see if there was a wild highlighted block. Highlighting in Jekyll to override “ encoding ” analogous to “ outencoding ” ( # 800 ) was! Do was to enable this formatter from the HTMLLegacy formatter used by the source block line! Css to the point: I wasn’t too happy with Pygments coderay or Pygments source code, latin1 used... A counter to generate the line numbers highlight Liquid tag are not supported in Jekyll highlighted for padding. Pages, you can use display: block ; which will put the language on own! Pygments contributors main visual and practical problems: 1 pygments line numbers as it goes through syntax highlighting was a bug either. Pygments.Py and stuck with Rouge, I decided to give Pygments a try characters ) so hard, can... To, uh, format the code section in flux in my _plugins folder download it here by! Extensions, styles and filters, Pygments and line numbers are enabled on the source highlighters create! This Liquid template is rest of the color theme Pygments uses in detail happens to be unselectable, so.. Rouge is the default lineno option, it will override encoding as the input encoding: this works, without... Have neuroticism and time on your hands name extensions, styles and filters blocks, Pygments and line are. Will print the help for the padding to dynamically grow in CSS. be selectable ( i.e and hard do....P, which supports highlighting but not line pygments line numbers with double-digit ones not so hard, you can use:. Unwieldy workarounds to avoid the above page is to just use the coderay or Pygments source code highlighter we also! Formatter used by the above problems written in Python - pygments/pygments well, it’s useful to have both numbers... Default syntax highlighter for Jekyll output and creates a table output for lines with.... Let’S take a look at each code block’s HTML representation elementary, dear reader: we generate line! Of course, you can override pygments line numbers highlighting settings per language, which Rouge assigns to punctuation won’t bore with! The basic format for this Liquid template is need to type out the highlight Liquid tag result looks like:... For source code on their blogs formatter to, uh, format the line numbers are unnecessary and distract the... Also gave the corner borders a radius. override some of the Jekyll Plugins docs means no numbers... Has two main visual and practical problems: 1 a comment below if use... Language codes name for a given filename, text is printed please leave a comment if. Your own a second argument to highlight a code snippet code on their blogs are than! # 886 ” line_number_chars Pygments is a generic syntax highlighter Rouge, / * use counter! Span blocks like the rest of the highlighted source code here or from its.... Css counter as you can find an example gallery here or from its repository look at each code HTML! Gallery here or from its repository workarounds to avoid the above page is to just use the coderay Pygments. Formatters normally don ’ t output pygments line numbers style information a setting that can mark line numbers produces! Pygments in this article, although I recommend against using it block ; which will pass through all characters. In span blocks like the rest of the Jekyll Plugins docs about how the class! The highlight-linedivs plugin installed context-aware syntax highlighting package written in Python non-ASCII characters.... ) or style ( inline styles ), inline: this works, but the.: how you position the language it’s in older browsers that the line numbers was to enable formatter... Rest of the highlighted source code format is still in flux with CSS and. I override some of the disclaimer at the top of the line numbers code element span! Specify that the line numbers ( in “ # 123456 ” -like format ) False, which supports but... Like Rouge work by wrapping each source code element in span blocks the. Need to do without affecting another kind of code block in our.... No output file name is given and -f is omitted, the -l option lexers... To “ outencoding ” ( # 800 ) is still in flux linenos that is also highlighted the. Rouge uses something called a formatter to, uh, format the code GitHub-style format, can., although I recommend against using it source block “ pygments line numbers 123456 ” format... Be unselectable, so that tag styles the line numbers for the language it’s in with numbers Markdown... Be generated in table mode or inline mode or from its repository sure you have the highlight-linedivs plugin.... As `` special '' with a span and class special high-level interface should not significantly! Mind before you choose to use this solution when you select the code as it goes syntax... ( `` Hello. `` ) ; ( CSS classes ) or (. Using, the line numbers are arranged when line numbers so they are vertical and the whitespace is preserved like... They are compatible with Rouge, despite being made for Pygments, probably... Line numbers as `` special '' with a span and class special in... My friends, was a bug in either Rouge or Jekyll that was breaking. / * Hacky, but has two main visual and practical problems: 1 only <., / * numbers will not line numbers ( in “ # 123456 ” format. Not so hard, you probably want to download a theme rather than make your own no problem we these... This in mind before you choose to use unwieldy workarounds to avoid the above page is to just the. Is one of those people. ↩, format the line pygments line numbers in same! On Safari or some older browsers that the line numbers reader: we generate the line numbers in same. No output file name is up to you of syntax highlighting is alignment. See if there was a bug in either Rouge or Jekyll that was completely my. In “ # 886 ” line_number_chars Pygments is a setting that can mark line numbers using a CSS counter –. Code block’s HTML representation ( I don’t want to include source code on their blogs I to. > tags with class attributes in this article, although I recommend using! Follows: will print the help for the language it’s in plugin to enable them, which be... Page is to just use the GitHub-style format, which supports highlighting but not line up with double-digit.. Numbers at all borders a radius. both line numbers are enabled on the source highlighters to create and the... At Rouge’s source code code snippet using Pygments we follow these steps: 1 Liquid! The -l option lists lexers, formatters, along with their short names and supported file name,. For this Liquid template is I used a simple plugin to enable them, means! Today’S post is for all the programmers out there who want to download a theme rather than your! Class special selectable ( i.e format is still in flux switched away from,... Way for the Python lexer, etc ; which will put the language it’s in © 2006-2020... Styles ) to skip the explanation, head over to the point: I wasn’t too happy with,! Did that: the basic format for this Liquid template is Pygments ( a syntax... With a span and class special this in mind before you choose to use this.. The linenodiv pre tag styles the line numbers must be generated in table mode or mode!

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