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May 2, 2023 16:27
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lightGallery inline gallery plugin for Jekyll
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| # Title: LightGallery Tag for Jekyll | |
| # Authors: Alex Bevilacqua <[email protected]> | |
| # Description: incorporate the LightGallery inline JavaScript gallery | |
| # | |
| # Adaption of "Photos tag for Jekyll" by Devin Weaver, and the derived | |
| # "Gallery Tag for Jekyll" by Kevin Brown. | |
| # | |
| # Installation: | |
| # | |
| # {% gallery_includes %} | |
| # | |
| # This macro should be added to the `<HEAD>` of your template(s) | |
| # in order to load the libraries and stylesheets needed by LightGallery | |
| # | |
| # Usage: | |
| # | |
| # {% gallery %} | |
| # photo1.jpg | |
| # /path/to/photos/photo2.jpg | |
| # {% endgallery %} | |
| # | |
| module Jekyll | |
| class PhotosUtil | |
| def initialize(context) | |
| @context = context | |
| end | |
| def path_for(filename) | |
| filename = filename.strip | |
| prefix = (@context.environments.first['site']['baseurl'] unless filename =~ /^(?:\/|http)/i) || "" | |
| "#{prefix}#{filename}" | |
| end | |
| end | |
| class LightGalleryScriptIncludePatch < Liquid::Tag | |
| def render(context) | |
| # https://cdnjs.com/libraries/lightgallery | |
| return <<-eof | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/lightgallery.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/plugins/zoom/lg-zoom.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/plugins/thumbnail/lg-thumbnail.min.js"></script> | |
| <link href="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/css/lightgallery-bundle.min.css" rel="stylesheet"> | |
| <link href="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/css/lg-transitions.min.css" rel="stylesheet"> | |
| <link href="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/css/lg-zoom.min.css" rel="stylesheet"> | |
| <link href="https://cdnjs.cloudflare.com/ajax/libs/lightgallery/2.7.1/css/lg-thumbnail.min.css" rel="stylesheet"> | |
| <style> | |
| .inline-gallery-container { | |
| width: 100%; | |
| // set 60% height | |
| height: 0; | |
| padding-bottom: 65%; | |
| } | |
| </style> | |
| eof | |
| end | |
| end | |
| class LightGalleryTag < Liquid::Block | |
| def initialize(tag_name, markup, tokens) | |
| # No initializing needed | |
| super | |
| end | |
| def render(context) | |
| # Convert the entire content array into one large string | |
| lines = super | |
| # split the text by newlines | |
| lines = lines.split("\n") | |
| p = PhotosUtil.new(context) | |
| gallery = "<div id='inline-gallery-container' class='inline-gallery-container'></div>" | |
| gallery << "<script>" | |
| gallery << "const lgContainer = document.getElementById('inline-gallery-container');" | |
| gallery << "const inlineGallery = lightGallery(lgContainer, {" | |
| gallery << " container: lgContainer," | |
| gallery << " dynamic: true," | |
| gallery << " hash: false," | |
| gallery << " closable: false," | |
| gallery << " showMaximizeIcon: true," | |
| gallery << " appendSubHtmlTo: '.lg-item'," | |
| gallery << " slideDelay: 100," | |
| gallery << " dynamicEl: [ " | |
| lines.each_with_index do |line, i| | |
| next if line.empty? | |
| filename, title = line.split(":") | |
| title = (title.nil?) ? filename : title.strip | |
| gallery << "{ src: '#{p.path_for(filename)}', thumb: '#{p.path_for(filename)}' }," | |
| end | |
| gallery << "], thumbWidth: 60, thumbHeight: \"40px\", thumbMargin: 4 });" | |
| gallery << "inlineGallery.openGallery();" | |
| gallery | |
| end | |
| end | |
| end | |
| Liquid::Template.register_tag('gallery', Jekyll::LightGalleryTag) | |
| Liquid::Template.register_tag('gallery_includes', Jekyll::LightGalleryScriptIncludePatch) |
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