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- Fixes #1723 Allow skipping social image generation Also generate social image for blog posts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| skip_social_images: true |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| require 'chunky_png' | ||
| require 'cairo' | ||
| require 'rsvg2' | ||
|
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| module Jekyll | ||
| # Generates social images for blog posts and guides | ||
| module SocialImages | ||
| def social_image(text, page_path) | ||
| # If text is not empty, return it | ||
| if text.nil? || text.empty? | ||
| if File.exist?("./assets/images/social/#{File.basename(page_path, '.adoc')}.png") | ||
| return "/assets/images/social/#{File.basename(page_path, '.adoc')}.png" | ||
| else | ||
| return "/assets/images/quarkus_card.png" | ||
| end | ||
| else | ||
| text | ||
| end | ||
| end | ||
| end | ||
|
|
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| class GenerateSocialImagesGenerator < Generator | ||
| def generate(site) | ||
| # Check if skip_social_images is set to true | ||
| # If so, skip generating social images | ||
| # This is useful when running the site locally | ||
| if site.config['skip_social_images'] | ||
| Jekyll.logger.info('Skipping social image generation') | ||
| return | ||
| end | ||
| generate_images(Dir.glob(File.join(site.source, '_posts', '*.adoc')), site) | ||
| generate_images(Dir.glob(File.join(site.source, '_guides', '*.adoc')), site) | ||
| end | ||
|
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| def split_text_into_lines(text) | ||
| lines = [] | ||
| words = text.split(' ') | ||
| current_line = '' | ||
|
|
||
| words.each do |word| | ||
| if current_line.length + word.length <= 32 | ||
| current_line += (current_line == '' ? '' : ' ') + word | ||
| else | ||
| lines.push(current_line) | ||
| current_line = word | ||
| end | ||
| end | ||
|
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| lines.push(current_line) unless current_line.empty? | ||
|
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| lines | ||
| end | ||
|
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| private | ||
|
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| def generate_images(files, site) | ||
| output_dir = 'assets/images/social' | ||
| FileUtils.mkdir_p(File.join(site.source, output_dir)) | ||
|
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| files.each do |guide_file| | ||
| basename = File.basename(guide_file, '.adoc') | ||
| if basename.start_with?('_') | ||
| next | ||
| end | ||
| title = extract_title(guide_file) | ||
| # Skip if title is empty | ||
| if (title.nil? || title.empty?) | ||
| next | ||
| end | ||
| output_file = File.join(site.source, output_dir, "#{basename}.png") | ||
| # Skip if the file already exists | ||
| if File.exist?(output_file) | ||
| next | ||
| end | ||
|
|
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| Jekyll.logger.info("Generating social image for '#{title}' in #{output_file}") | ||
|
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| # Generate the SVG image | ||
| svg_image_str = generate_svg_string(title) | ||
|
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| # Create a Cairo surface and context for the PNG image (must be smaller than 600x330) | ||
| surface = Cairo::ImageSurface.new(Cairo::FORMAT_ARGB32, 600, 250) | ||
| context = Cairo::Context.new(surface) | ||
|
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| # Load and render the SVG onto the Cairo context | ||
| svg = RSVG::Handle.new_from_data(svg_image_str) | ||
| context.render_rsvg_handle(svg) | ||
|
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||
| # Save the Cairo surface to a PNG file | ||
| b = StringIO.new | ||
| surface.write_to_png(b) | ||
|
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| # Compose the generated image with the template image | ||
| png_image = ChunkyPNG::Image.from_file('_plugins/assets/quarkus_card_blank.png') | ||
| # Change the last parameters to change the position of the generated image | ||
| png_image.compose!(ChunkyPNG::Image.from_blob(b.string), 0, 80) | ||
|
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| # Save the composed image to the output file | ||
| png_image.save(output_file) | ||
| end | ||
| end | ||
|
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| def generate_svg_string(title) | ||
| idx = 90 | ||
| font_size = 30 | ||
| tspan_elements = '' | ||
| # Sanitize title | ||
| title = title.gsub(/&/, '&') | ||
| title = title.gsub(/</, '<') | ||
| title = title.gsub(/>/, '>') | ||
|
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||
| split_text_into_lines(title).each_with_index do |line, index| | ||
| tspan_elements += "<tspan x='50%' y='#{idx}'>#{line}</tspan>" | ||
| idx += font_size + 10 | ||
| end | ||
| " | ||
| <svg width=\"600\" height=\"330\"> | ||
| <style> | ||
| .title { fill: white; font-size: #{font_size}px; font-weight: bold; font-family:'Open Sans'} | ||
| </style> | ||
| <text x=\"50%\" y=\"50%\" text-anchor=\"middle\" class=\"title\" > | ||
| #{tspan_elements} | ||
| </text> | ||
| </svg> | ||
| " | ||
| end | ||
|
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| def extract_title(adoc_file) | ||
| line_nr = 0 | ||
| File.readlines(adoc_file).each do |line| | ||
| if line_nr == 0 | ||
| # If line does not start with --- break | ||
| unless line.strip.start_with?('---') | ||
| break | ||
| end | ||
| end | ||
| if line_nr > 0 && line.strip.start_with?('---') | ||
| break; | ||
| end | ||
| if line.strip.start_with?('title:') | ||
| title = line.strip.sub('title:', '').strip | ||
| # Remove quotes | ||
| title = title.gsub(/\A[\"']|[\"']\z/, '') | ||
| return title | ||
| end | ||
| line_nr += 1 | ||
| end | ||
| doc = Asciidoctor.load_file(adoc_file, header_only: true, logger: NullLogger.new) | ||
| doc.doctitle | ||
| end | ||
| end | ||
| end | ||
|
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| Liquid::Template.register_filter(Jekyll::SocialImages) |