pygments line numbers

Additionally, there was a bug in either Rouge or Jekyll that was completely breaking my pages when I used the linenos option. a number of output formats is available, including: HTML. When we use the coderay or pygments source code highlighter we can also include line numbers. One is "line step" which, if set to a number n > 1, will print only every n th line number. Sets the name of the color theme Pygments uses. quote the option value in this case too, so that the shell doesn’t split it). a number of output formats is available, among them HTML, RTF, LaTeX and ANSI sequences. Here’s the default lineno option, inline: This works, but has two main visual and practical problems: 1. Copy the CSS file (native.css for example) into your css directory and import the syntax highlighter styles into your main.css: only one category, give it as an argument: The -H option will give you detailed information (the same that can be found output is written to the console), the default encoding for lexer and For example, you can use display: block; which will put the language on its own line. To highlight a code snippet using Pygments we follow these steps: 1. Yep, we’re going advanced. Remember that for each kind of highlighted code block mentioned above, there is a corresponding version that is not highlighted (like this). Default: 1. line_number_bg. If set to 'inline', the line numbers will be You can find ready-made themes on GitHub. Now, any time you want source code to have line numbers, you just need to include the linedivs option: What the devil?! 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. Today’s post is for all the programmers out there who want to include source code on their blogs. We must add the attribute linenums to the listing block in our markup. • blogging when copying from source code blocks). How do you highlight source code? ANSI sequences (console output) LaTeX. Formatters normally don’t output full style information. You don’t need to update your Liquid tags when switching to Pygments – the format is still {% highlight lang linenos %}. While this works well, the line numbers it produces are less than satisfactory. 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 Pygments or Rouge you can use a stylesheet for Pygments, you can find an example gallery here or from its repository. 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. lexer is known for that filename, text is printed. it is usable as a command-line tool and as a library. (I don’t think there’s any way for the padding to dynamically grow in CSS.) So, I waved bye-bye to pygments.py and stuck with Rouge. There is a second argument to highlight called linenos that is optional. Select lexer. Default: pastie. That’s impressive, and kind of sad. The step used when printing line numbers. Let me show you: where lang is one of these language codes. May 14, 2018 That’s not supposed to happen with CSS-generated text, but apparently this rule (like many other CSS laws) may not always be followed. Elementary, dear reader: we generate the line numbers using a CSS counter. The above command could therefore also be given as: To create a full HTML document, including line numbers and stylesheet (using the Pygments is licensed under the BSD license. Change width. Controls what method is used for applying CSS to the tokens. How does this work? 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. 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). 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. It supports a few more languages than Rouge but doesn’t produce as nice-looking or context-aware syntax highlighting. I'm on nanoc 3.6.9 and pygments.rb 0.5.4 (backed by pygments 1.6). I also talk about Pygments in this article, although I recommend against using it. Select the output format. 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. Can be class (CSS classes) or style (inline styles). The other option is a setting that can mark line numbers as "special" with a span and class special. RTF. line_number_start. 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. It is a generic syntax highlighter suitable for use in code hosting, forums, wikis or other applications that need to … The command-line “pygmentize” tool now tries a little harder to find the correct encoding for files and the terminal (#979). All I had to do was to enable this formatter from the HTMLLegacy formatter used by Jekyll by default. This library provides improved line numbers for the Pygments HTML formatter. pygments-linenums-mode. 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. You may notice on Safari or some older browsers that the line numbers are highlighted when you select the code. The theme used on this site was made by yours truly – download it here. Examining the element for {%,2 I saw it has the class .p, which Rouge assigns to punctuation. Well, it’s useful to have inline code that is also highlighted for the language it’s in. I also gave the corner borders a radius.) 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. Clearly, this format doesn’t fit our needs. Note: anonymous comments require approval. filter name and options must be one shell word, so there may not be any spaces as the input encoding. encoding for lexer and formatter is the terminal encoding or the default 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 result looks like this: println!("Hello.");. The default value is False, which means no line numbers at all. If an option Better line numbers for Pygments HTML. It won’t highlight anything yet. 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. will pass through all non-ASCII characters). 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. I’ve heard some people say that line numbers are unnecessary and distract from the source code. from files relative to the current directory. 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. The -L option lists lexers, formatters, along with their short Jekyll. Pygments for code highlighting, line numbers with CSS Counters and custom redcarpet plugin. Pygments also has a few additional options in regards to line numbers. TerminalFormatter is used. commas or equals signs. 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. Pygments has two available styles when outputting source code with line numbers enabled: table and inline. If it is not given, output is How do you tame this majestic beast? 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. Although Jekyll has switched away from Pygments, you can still opt to use it. Hope you enjoyed this brief overview of syntax highlighting in Jekyll. Default: “#eed” line_number_fg. Default: 1. line_number_step. in this documentation) about a lexer, formatter or filter. you didn’t give an explicit formatter name). 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. Voila! will print out python. Anchor names that differ only in case may not appear in the same document. This is copy-and-paste-friendly, but may cause alignment problems with some browsers or fonts. There is a nice blog post by Drews Ilcock that explains this technique. The -N option guesses a lexer name for a given filename, so that. The BetterHtmlFormatter supports two styles:. The recommendation by the above page is to just use the GitHub-style format, which supports highlighting but not line numbers. 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. Using linenos with Pygments, the line numbers are placed in span blocks like the rest of the highlighted source code. I used a simple plugin to enable them, which I downloaded from here and put in my _plugins folder. 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. Not so hard, you just need to type out the highlight Liquid tag. I wanted to write about this topic because existing blog posts provided poor or incorrect suggestions. 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. omit this option. To see the list of available style names, see Available Pygments style names. Keep this in mind before you choose to use this solution. Did you see it?! Stay calm, I’ll walk you through this. Create a file with a class named line_numbers. Created using, the Pygments documentation on Lexer development. Let’s take a look at each code block’s HTML representation. Line 2 - The linenodiv pre tag styles the line numbers. I also provide a line between the line numbers and the code. expects a list value, separate the list entries with spaces (you’ll have to 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.       •, Hello! 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 … Default: class. Coding. 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. jekyll The line number of the first line. By default, highlighted inline code blocks are not supported in Jekyll. If no output file name is given and -f is omitted, the pygments-promql. It’s safe to install, I swear on my honor. Thank you for your attention – bye. Line 4 - The ‘code’ class contains the actual code snippet. 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. Okay, I won’t bore you with more details. 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. Call the highlight()function. To quote the page: DO NOT use Jekyll’s { % highlight % } … { % endhighlight % } syntax, especially together with the linenos option. “What about GitHub-style code blocks?” No problem. The background colour (in “#123456” format) of the line number bar, or None to use the style background color. All you need is to install this plugin. names and supported file name extensions, styles and filters. it is usable as a command-line tool and as a library … and it highlights even Perl 6! parsing and formatting is fast. 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. Added “inencoding” option for lexers to override “encoding” analogous to “outencoding” (#800). Added line-by-line “streaming” mode for pygmentize with the “-s” option. Don’t worry, it’s not a virus. Default: “#886” line_number_chars css Since the -O option argument is split at commas and expects the split values As a last resort, latin1 is used (which around the colon. Code fenced blocks, Pygments and line numbers with jekyll. Syntax highlighters like Rouge work by wrapping each source code element in span classes. First, let’s cover the absolute basics. Since the Rouge linenos parameter was broken and I had ruled out line anchors, I was back at square one. Now you can use the linenos option. pygments-css. Pygments is a syntax highlighting package written in Python. pygments-css. Usually I don’t want to highlight this class, but I made an exception for Liquid: Line numbers. © Copyright 2006-2020, Georg Brandl and Pygments contributors. 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. Turns out, Rouge does have a formatter that, instead of generating anchors before each line, wraps each line in its own div. If you give an outencoding option, it will override encoding If no specific formatter by default only outputs  tags with class attributes. If you want to see This is all you need to do to access the attribute’s value: How you position the language name is up to you. How I did that: The basic format for this Liquid template is. See the Pygments stylesheet section to learn more about how the value class is handled. But you’d need to do a bit of work to make them look good and not be selectable (i.e. Chroma takes source code and other structured text and converts it into … It’s important. pygments-style. I override some of the ‘pre’ tag settings as defined by bootstrap. Internally, Rouge uses something called a formatter to, uh, format the code as it goes through syntax highlighting. We can specify that the line numbers must be generated in table mode or inline mode.  First, make sure you have the highlight-linedivs plugin installed. get_style_defs() method. Without these lines, single-digit line, /* numbers will not line up with double-digit ones. /* Use a counter to generate the line numbers */, /* Hacky, but necessary. The above command could therefore also be given as: $ pygmentize -o test.html test.py. 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 … For example, with my default highlighting settings, a Liquid code block would look like this: I didn’t like the tag openers ({% and %}). Line numbers. > Bumping as my problem is identical. Better line numbers for Pygments HTML. Wow. Read more in the FAQ list or the documentation, or download the latest release. To get to the point: I wasn’t too happy with Pygments. Did you actually read the whole post up until this point? As you can see, the -l option explicitly selects a lexer. The -o option gives an output file name. as the output encoding. 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) Pygments highlight the whole line, with or without line numbers in the output. I realized that in order to have both line numbers and good syntax highlighting with Rouge, I would need to do some hacking. if an output file name is given and has a supported extension). If you don’t give an encoding and haven’t given an output file (that means I’ll assume you’re using Jekyll with the default Markdown converter kramdown and syntax highlighter Rouge. Pygments is a generic syntax highlighter written in Python - pygments/pygments. to be of the form name=value, you can’t give an option value that contains 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”. Whether line numbers should be shown: True/False. NOTE: As Chroma has just been released, its API is still in flux. For compatibility with Pygments 0.7 and earlier, every true value except 'inline' means the same as 'table' (in particular, that means also True). You can use Pygments from the shell, provided you installed the Using linenos with Pygments, the line numbers are placed in span blocks like the rest of the highlighted source code. Content generated by CSS happens to be unselectable, so the hard part is just alignment and styling. If set to 'table', output line numbers as a table with two cells, one containing the line numbers, the other the whole code. Usage is as follows: generates a CSS style sheet (because you selected the HTML formatter) for 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. characters, such as spaces or expansion wildcards like *. (inferred from the file name extension) and the terminal formatter (because Of course, you probably want to download a theme rather than make your own. As of this writing, Rouge is the default syntax highlighter for Jekyll. The -f option selects a formatter (as with -l, it can also be omitted locale encoding of the system. It’s based on my Emacs theme Nimbus. This attribute is used by the source highlighters to create and format the line numbers. Please, don’t be one of those people. ↩. Therefore, there’s a special -S option for generating style definitions. For example, the HTML Default: 1. line_number_bg. Usage is as follows: will print the help for the HTML formatter, while. Can be class (CSS classes) or style (inline styles). 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. This library provides improved line numbers for the Pygments HTML formatter. Line numbers¶ Pygments can generate line numbers for code blocks. I looked at Rouge’s source code to see if there was any way to do something like line anchors, but without the anchors. output encoding. Controls how line numbers are arranged when line numbers are enabled on the source block. After bumping my head on this for a while, I decided to give Pygments a try. The text color of the line numbers (in “#123456”-like format). 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. You can override the highlighting settings per language, which can be pretty useful if you have neuroticism and time on your hands. written to stdout. If you want to skip the explanation, head over to the Code section. 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). Line 3 - Styles the line numbers so they are vertical and the whitespace is preserved. 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. They are compatible with Rouge, despite being made for Pygments (a Python-based syntax highlighter). 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 Controls what method is used for applying CSS to the tokens. If you give an inencoding option, it will override encoding That, my friends, was a wild highlighted code block in its natural habitat. 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. 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. 2. So if you stick with the linenos option, you have to use unwieldy workarounds to avoid the above problems. Default: True. formatter is the terminal encoding (sys.stdout.encoding). Syntax highlighting that looks nice.1. Why mention inline highlighting if you need a plug-in for it? 3. Fancy! Changing the styling for source code can be confusing, and hard to do without affecting another kind of code block. Please leave a comment below if you have any questions or comments! But if you use GitHub Pages, you should be aware of the disclaimer at the top of the Jekyll Plugins docs. Let’s go through each step in detail. pygmentize script: will print the file test.py to standard output, using the Python lexer 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.  Few additional options in regards to line numbers so they are compatible with Rouge that: basic... Github-Style format, which Rouge assigns to punctuation how you position the language on its own line are in... Code snippet Plugins docs code as it goes through syntax highlighting with Rouge theme used this. Blocks? ” no problem below if you have to use unwieldy workarounds to avoid the problems. Numbers so they are vertical and the pygments line numbers is preserved Pygments stylesheet section to more... Selects a lexer name for a given filename, so that few additional options regards... Default value is False, which I downloaded from here and put in my _plugins.. Given and -f is omitted, the line numbers since the Rouge linenos parameter was broken I! A second argument to highlight this class, but may cause alignment problems some! “ outencoding ” ( # 800 ) formatter, while and not be selectable ( i.e style... The same document 3 - styles the line numbers and good syntax highlighting with Rouge, I need. Of work to make them look good and not be selectable ( i.e wrapping each source code to if! My series of articles about Jekyll overview of syntax highlighting with Rouge stylesheet for Pygments Rouge! When you select the code as it goes through syntax highlighting override encoding as the encoding! The Jekyll Plugins docs Jekyll with the linenos option, you can use a for... And Pygments contributors still in flux a syntax highlighting with Rouge can override the highlighting settings per,! This attribute is used ( which will pass through all non-ASCII characters ) about Pygments in this article, I... Can mark line numbers are placed in span classes them HTML, RTF, LaTeX and ANSI....: pygments-css switching to Pygments – the format is still in flux be useful. In “ # 886 ” line_number_chars Pygments is a setting that can mark line numbers with.! Is copy-and-paste-friendly, but without the anchors was broken and I had out! Some browsers or fonts used by the above problems this site was made yours. My honor supported in Jekyll actually read the whole line, / * use a stylesheet for Pygments or you... You: where lang is one of those people. ↩ your own stuck with,. Look good and not be selectable ( i.e it will override encoding the. Notice on Safari or some older browsers that the line numbers of articles Jekyll! A number of output formats is available, among them HTML, RTF, LaTeX ANSI. Formatter, while so the hard part is just alignment and styling a comment if. Be selectable ( pygments line numbers -N option guesses a lexer above command could therefore also be given as $... Names that differ only in case may not appear in the same document this overview... Not appear in the output encoding, while style names, see available style. Whitespace is preserved highlight-linedivs plugin installed to do some hacking a formatter to, uh, format the line and... Rouge uses something called a formatter to, uh, format the as. That differ only in case may not appear in the output encoding default: “ # 123456 ” format. See if there was a bug in either Rouge or Jekyll that completely... Pass through all non-ASCII characters ) code fenced blocks, Pygments and line (! Did you actually read the whole line, with or without line numbers the ‘ pre ’ settings. Articles about Jekyll be one of these language codes without line numbers * / /. Those people. ↩ of available style names, see available Pygments style names, see available Pygments names. There who want to download a theme rather than make your own download latest. Enabled on the source block generated by CSS happens to be unselectable, so the hard part is alignment... About how the value class is handled * numbers will not line up with double-digit ones default and..., text is printed posts provided poor or incorrect suggestions double-digit ones enable them, can. Anchor names that differ only in case pygments line numbers not appear in the FAQ list or the,! Css. see available Pygments style names, see available Pygments style.... Of these language codes code can be class ( CSS classes ) or style ( inline ). A Python-based syntax highlighter ) Pygments for code highlighting, line numbers are highlighted when you select code! Highlighted code block in our markup s go through each step in detail is a nice post! # 800 ) line between the line numbers in the same document may not appear in the output encoding more!

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