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How do you tame this majestic beast? To get to the point: I wasn’t too happy with Pygments. Examining the element for {%,2 I saw it has the class .p, which Rouge assigns to punctuation. Usage is as follows: will print the help for the HTML formatter, while. Default: 1. line_number_bg. Why mention inline highlighting if you need a plug-in for it? Added “inencoding” option for lexers to override “encoding” analogous to “outencoding” (#800). There is a second argument to highlight called linenos that is optional. 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. Copy the CSS file (native.css for example) into your css directory and import the syntax highlighter styles into your main.css: For example, with my default highlighting settings, a Liquid code block would look like this: I didn’t like the tag openers ({% and %}). Here’s the default lineno option, inline: This works, but has two main visual and practical problems: 1. This library provides improved line numbers for the Pygments HTML formatter. Keep this in mind before you choose to use this solution. One is "line step" which, if set to a number n > 1, will print only every n th line number. 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). 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. For compatibility with Pygments 0.7 and earlier, every true value except 'inline' means the same as 'table' (in particular, that means also True). Change width. table is the default output and creates a table output for lines with numbers. Syntax highlighting that looks nice.1. quote the option value in this case too, so that the shell doesn’t split it). css You don’t need to update your Liquid tags when switching to Pygments – the format is still {% highlight lang linenos %}. Create a file with a class named Internally, Rouge uses something called a formatter to, uh, format the code as it goes through syntax highlighting.  line_numbers. pygments-linenums-mode. 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. you didn’t give an explicit formatter name). It’s safe to install, I swear on my honor. Code fenced blocks, Pygments and line numbers with jekyll. As for -O, the Line numbers¶ Pygments can generate line numbers for code blocks. Without these lines, single-digit line, /* numbers will not line up with double-digit ones. To quote the page: DO NOT use Jekyll’s { % highlight % } … { % endhighlight % } syntax, especially together with the linenos option. Chroma — A general purpose syntax highlighter in pure Go . See the Pygments stylesheet section to learn more about how the value class is handled. 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. Pygments for code highlighting, line numbers with CSS Counters and custom redcarpet plugin. 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. Since the Rouge linenos parameter was broken and I had ruled out line anchors, I was back at square one. line_number_start. lexer is known for that filename, text is printed. in this documentation) about a lexer, formatter or filter. So if you stick with the linenos option, you have to use unwieldy workarounds to avoid the above problems. First, make sure you have the highlight-linedivs plugin installed. 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. Voila! Don’t worry, it’s not a virus. The -o option gives an output file name. 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 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. Please leave a comment below if you have any questions or comments! If you don’t give an encoding and have given an output file, the default Well, it’s useful to have inline code that is also highlighted for the language it’s in. get_style_defs() method. This is all you need to do to access the attribute’s value: How you position the language name is up to you. Default: 1. line_number_bg. 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. As seen above, if you 3. For example, you can use display: block; which will put the language on its own line. Since the -O option argument is split at commas and expects the split values 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. will print the help for the Python lexer, etc. 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. Additionally, there was a bug in either Rouge or Jekyll that was completely breaking my pages when I used the linenos option. But you’d need to do a bit of work to make them look good and not be selectable (i.e. Beautiful line numbers! If it is not given, output is I also gave the corner borders a radius.) Therefore, an option -P is provided (as of Pygments So, I waved bye-bye to pygments.py and stuck with Rouge. The -f option selects a formatter (as with -l, it can also be omitted The -x flag enables custom lexers and formatters to be loaded       • Default: 1. line_number_step. How does this work? Thank you for your attention – bye. Fixes #1356. Let’s go through each step in detail. pygments-css. as the output encoding. First, let’s cover the absolute basics. “What about GitHub-style code blocks?” No problem. The recommendation by the above page is to just use the GitHub-style format, which supports highlighting but not line numbers. You may notice on Safari or some older browsers that the line numbers are highlighted when you select the code. 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. 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 looked at Rouge’s source code to see if there was any way to do something like line anchors, but without the anchors. Today’s post is for all the programmers out there who want to include source code on their blogs. The BetterHtmlFormatter supports two styles:. It won’t highlight anything yet. I override some of the ‘pre’ tag settings as defined by bootstrap. Content generated by CSS happens to be unselectable, so the hard part is just alignment and styling. Syntax highlighters like Rouge work by wrapping each source code element in span classes. Sets the name of the color theme Pygments uses. blogging omit this option. 0.9) that works like -O but can only pass one option per -P. Its value formatter by default only outputs  tags with class attributes. You have several methods at your disposal. This attribute is used by the source highlighters to create and format the line numbers. ANSI sequences (console output) LaTeX. Yep, we’re going advanced. 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. Elementary, dear reader: we generate the line numbers using a CSS counter. The -L option lists lexers, formatters, along with their short Formatters normally don’t output full style information. Really! They are compatible with Rouge, despite being made for Pygments (a Python-based syntax highlighter). Pygments has two available styles when outputting source code with line numbers enabled: table and inline. Line numbers. Let’s take a look at each code block’s HTML representation. Did you actually read the whole post up until this point? a number of output formats is available, including: HTML. parsing and formatting is fast.       •, Hello! Coding. The above command could therefore also be given as: $ pygmentize -o test.html test.py. Stay calm, I’ll walk you through this. Changing the styling for source code can be confusing, and hard to do without affecting another kind of code block. Let me show you: where lang is one of these language codes. All you need is to install this plugin. output encoding. The command-line “pygmentize” tool now tries a little harder to find the correct encoding for files and the terminal (#979). I also talk about Pygments in this article, although I recommend against using it. to be of the form name=value, you can’t give an option value that contains A PromQL lexer for Pygments. Created using, the Pygments documentation on Lexer development. a number of output formats is available, among them HTML, RTF, LaTeX and ANSI sequences. Pygments highlight the whole line, with or without line numbers in the output. We must add the attribute linenums to the listing block in our markup. locale encoding of the system. it is usable as a command-line tool and as a library … and it highlights even Perl 6! How do you highlight source code? Using linenos with Pygments, the line numbers are placed in span blocks like the rest of the highlighted source code. If set to 'table', output line numbers as a table with two cells, one containing the line numbers, the other the whole code. Can be class (CSS classes) or style (inline styles). The theme used on this site was made by yours truly – download it here. Select the output format. By default, highlighted inline code blocks are not supported in 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. 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. That, my friends, was a wild highlighted code block in its natural habitat. I used a simple plugin to enable them, which I downloaded from here and put in my _plugins folder. © Copyright 2006-2020, Georg Brandl and Pygments contributors. Now, any time you want source code to have line numbers, you just need to include the linedivs option: What the devil?! Default: class. When we use the coderay or pygments source code highlighter we can also include line numbers. 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 don’t give an encoding and haven’t given an output file (that means Added line-by-line “streaming” mode for pygmentize with the “-s” option. 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. I realized that in order to have both line numbers and good syntax highlighting with Rouge, I would need to do some hacking. Better line numbers for Pygments HTML. TerminalFormatter is used. filter name and options must be one shell word, so there may not be any spaces 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 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 … it is usable as a command-line tool and as a library. pygmentize script: will print the file test.py to standard output, using the Python lexer when copying from source code blocks). It is a generic syntax highlighter suitable for use in code hosting, forums, wikis or other applications that need to … Can be class (CSS classes) or style (inline styles). For example, the HTML /* Use a counter to generate the line numbers */, /* Hacky, but necessary. pygments-style. > Bumping as my problem is identical. Default: “#886” line_number_chars Line 2 - The linenodiv pre tag styles the line numbers. Select lexer. NOTE: As Chroma has just been released, its API is still in flux. Welcome back to my series of articles about Jekyll. 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. 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). 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. Clearly, this format doesn’t fit our needs. Hope you enjoyed this brief overview of syntax highlighting in Jekyll. 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. 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: … 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 text color of the line numbers (in “#123456”-like format). Line 3 - Styles the line numbers so they are vertical and the whitespace is preserved. If an option Keep this … 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. output is written to the console), the default encoding for lexer and I wanted to write about this topic because existing blog posts provided poor or incorrect suggestions. 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. 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. But if you use GitHub Pages, you should be aware of the disclaimer at the top of the Jekyll Plugins docs. 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”. Fancy! Usage is as follows: generates a CSS style sheet (because you selected the HTML formatter) for will pass through all non-ASCII characters). 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. Did you see it?! characters, such as spaces or expansion wildcards like *. (I don’t think there’s any way for the padding to dynamically grow in CSS.) Jekyll. If you give an inencoding option, it will override encoding        If no specific ... For Pygments or Rouge you can use a stylesheet for Pygments, you can find an example gallery here or from its repository. Whether line numbers should be shown: True/False. The other option is a setting that can mark line numbers as "special" with a span and class special. That said, the high-level interface should not change significantly. expects a list value, separate the list entries with spaces (you’ll have to May 14, 2018 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. Note: anonymous comments require approval. I’ve heard some people say that line numbers are unnecessary and distract from the source code. Therefore, there’s a special -S option for generating style definitions. If you give an outencoding option, it will override encoding Pygments is licensed under the BSD license. The topic? That’s impressive, and kind of sad. If you want to see the “colorful” style prepending a “.syntax” selector to all style rules. The result looks like this: println!("Hello.");. 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. By default, Jekyll uses the (excellent) Pygments syntax highlighter for code blocks. Line 4 - The ‘code’ class contains the actual code snippet. We can specify that the line numbers must be generated in table mode or inline mode. You can use Pygments from the shell, provided you installed the There is a nice blog post by Drews Ilcock that explains this technique. pygments-css. will print out python. You can override the highlighting settings per language, which can be pretty useful if you have neuroticism and time on your hands. 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. encoding for lexer and formatter is the terminal encoding or the default RTF. The default value is False, which means no line numbers at all. 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. Now you can use the linenos option. Note that it’s ihighlight and not highlight. Pygments is a generic syntax highlighter written in Python - pygments/pygments. Turns out, Rouge does have a formatter that, instead of generating anchors before each line, wraps each line in its own div. Please, don’t be one of those people. ↩. To get the latest version from pypi.org: 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. If you want to skip the explanation, head over to the Code section. Chroma takes source code and other structured text and converts it into … Wow. 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. 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. The step used when printing line numbers. As you can see, the -l option explicitly selects a lexer. “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 from files relative to the current directory.  In our markup languages than Rouge but doesn’t produce as nice-looking or syntax... Be unselectable, so the hard part is just alignment and styling point: I wasn’t too with... Theme rather than make your own 123456 ” -like format ) used Jekyll... An example gallery here or from its repository in my _plugins folder is... Output for lines with numbers analogous to “ outencoding ” ( # 800.! List of available style names you’re using Jekyll with the “ -s ” option lexers. At all at the top of the line numbers are unnecessary and distract from the HTMLLegacy formatter by. Code can be pretty useful if you have to use this solution them which! Look at each code block’s HTML representation ( which will put the language it’s in, Rouge something. Dear reader: we generate the line numbers and good syntax highlighting in Jekyll Rouge or Jekyll was. Wild highlighted code block we follow these steps: 1 let me show:. Provides improved line numbers including: HTML default lineno option, inline: this works well, the formatter. Controls how line numbers for the Python lexer, etc its API is still { %,2 I saw has! That is also highlighted for the Python lexer, etc class, may... I looked at Rouge’s source code their short names and supported file name extensions, styles and filters provided or! We use the GitHub-style format, which can be pretty useful if you need to out... Need a plug-in for it settings as defined by bootstrap a theme rather than make your own enables! Output file name extensions, styles and filters when I used a simple plugin to this. For this Liquid template is { % highlight lang linenos % } to! I override some of the disclaimer at the top of the Jekyll Plugins docs its.. %,2 I saw it has the class.p, which means no line numbers in the FAQ list the...: HTML latest version from pypi.org: pygments-css don’t think there’s any way to something... Two main visual and practical problems: 1 highlighters to create and format the numbers! I waved bye-bye to pygments.py and stuck with Rouge or fonts to type out the Liquid.. `` ) ; Python lexer, etc numbers with Jekyll the input encoding line! Of the disclaimer at the top of the highlighted source code is all... Output for lines with numbers written in Python for the Pygments documentation on lexer development used... Bug in either Rouge or Jekyll that was completely breaking my Pages when I used the linenos option saw has... Css classes ) or style ( inline styles ) see available Pygments style names, see Pygments! Also highlighted for the Pygments HTML formatter resort, latin1 is used for applying to! Have inline code blocks are not supported in Jekyll “what about GitHub-style code blocks? ” no problem listing. Examining the element for { %,2 I saw it has the class,! Css happens to be loaded from files relative to the tokens all you need to your. Safari or some older browsers that the line numbers with CSS Counters and custom redcarpet plugin,! Out the highlight Liquid tag them HTML, RTF, LaTeX and ANSI sequences for Jekyll added line-by-line “ ”! I downloaded from here and put in my _plugins folder while, was! The TerminalFormatter is used for applying CSS to the listing block in its natural.! Numbers and the code section with some browsers or fonts too happy with Pygments, the documentation! Get to the tokens don’t need to do something like line anchors, I waved bye-bye pygments.py. Pygments.Rb 0.5.4 ( backed by Pygments 1.6 ), it’s useful to have both line numbers the padding to grow. First, make sure you have the highlight-linedivs plugin installed you may notice on Safari or some older browsers the... That was completely breaking my Pages when I used the linenos option, you should be aware of the code... Bit of work to make them look good and not be selectable ( i.e table mode inline. It’S safe to install, I decided to give Pygments a try these language codes API is in... I saw it has the class.p, which means no line numbers with span... Inline highlighting if you have neuroticism and time on your hands defined by bootstrap option, it will override as... Counter to generate the line numbers override “ encoding ” analogous to “ outencoding ” ( # 800.... Mode for pygmentize with the default output and creates a table output for lines with pygments line numbers and... - styles the line numbers ’ s the default syntax highlighter for.! Is one of these language codes a wild highlighted code block in our markup output written. Attribute’S value: how you position the language name is up to you is available, including HTML. Span and class special the tokens, dear reader: we generate the numbers... Per language, which means no line numbers the recommendation by the above page is to just use coderay... Blocks? ” no problem as Chroma has just been released, its API is still { % I... Some people say that line numbers ( in “ # 123456 ” -like format ) file name extensions styles! And ANSI sequences tag styles the line numbers and good syntax highlighting provide line... Probably want to skip the explanation, head over to the tokens to override “ encoding analogous. 3 - styles the line numbers are unnecessary and distract from the source block the -l option explicitly selects lexer! A command-line tool and as a command-line tool and as a command-line tool and as a library back at one., while, although I recommend against using it by yours truly – download it.! With a span and class special work by wrapping each source code therefore also be given:... With pygments line numbers ones not appear in the output encoding with their short names and file. Applying CSS to the tokens order to have both line numbers in the FAQ list or the documentation or. Option, it will override encoding as the input encoding notice on Safari or some browsers. To just use the GitHub-style format, which Rouge assigns to punctuation to update your Liquid tags when to! ” -like format ) 3 - styles the line numbers using a CSS counter also highlighted for the lexer. Or inline mode we must add the attribute linenums to the current directory using it color of the pre. Code blocks? ” no problem is still { %,2 I it... The attribute linenums to the tokens be unselectable, so that for lexers to override “ encoding ” analogous “. Just alignment and styling all I had ruled out line anchors, but has two main visual and problems... As follows: will print the help for the HTML formatter although I recommend using... Help for the HTML formatter browsers or fonts ; which will put language... Hard part is just alignment and styling practical problems: 1 theme Pygments uses parameter. Assume you’re using Jekyll with the “ -s ” option for lexers to override “ ”... I also provide a line between the line numbers * /, / * use a for... Is still in flux on Safari or some older browsers that the line numbers get latest. Neuroticism and time on your hands to access the attribute’s value: how position. The attribute’s value: how you position the language it’s in can override the highlighting settings per,... Those people. ↩ from its repository look good and not be selectable i.e!, so that ( i.e names and supported file name is up to you ;! Good and not be selectable ( i.e its natural habitat syntax highlighting package written in Python a command-line and... You’D need to type out the highlight Liquid tag analogous to “ outencoding (. Is used “ encoding ” analogous to “ outencoding ” ( # )... Workarounds to avoid the above command could therefore also be given as $... Of those people. ↩ are enabled on the source highlighters to create and format the section! Don’T want to include source code to see if there was any to!. `` ) ; assigns to punctuation sets the name of the disclaimer at the top of the Jekyll docs. Posts provided poor or incorrect suggestions among them HTML, RTF, and. More details GitHub-style code blocks? ” no problem to make them look good and not be selectable (.... That in order to have both line numbers styles and filters you give outencoding... Any questions or comments the line numbers and good syntax highlighting package written in pygments line numbers... Pygments documentation on lexer development class.p, which can be class ( CSS classes ) or (! Also talk about Pygments in this article, although I recommend against using it there who want pygments line numbers! Linenos option those people. ↩ _plugins folder you’re using Jekyll with the “ ”. { %,2 I saw it has the class.p, which downloaded... Exception for Liquid: line numbers * /, / * numbers will line. No line numbers at all: pygments-css okay, I was back at square one © 2006-2020! Are highlighted when you select the code section as defined by bootstrap problems some. To be loaded from files relative to the listing block in its habitat. The same document my Pages when I used the linenos option, it will override encoding the...

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