43 lines
1.2 KiB
Ruby
43 lines
1.2 KiB
Ruby
# Automatic Image Sizes extension
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class Middleman::Extensions::AutomaticImageSizes < ::Middleman::Extension
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def initialize(app, options_hash={}, &block)
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super
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# Include 3rd-party fastimage library
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require 'vendored-middleman-deps/fastimage'
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end
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helpers do
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# Override default image_tag helper to automatically calculate and include
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# image dimensions.
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#
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# @param [String] path
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# @param [Hash] params
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# @return [String]
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def image_tag(path, params={})
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if !params.has_key?(:width) && !params.has_key?(:height) && !path.include?('://')
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params[:alt] ||= ''
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real_path = path
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real_path = File.join(config[:images_dir], real_path) unless real_path.start_with?('/')
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full_path = File.join(source_dir, real_path)
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if File.exists?(full_path)
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begin
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width, height = ::FastImage.size(full_path, :raise_on_failure => true)
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params[:width] = width
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params[:height] = height
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rescue FastImage::UnknownImageType
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# No message, it's just not supported
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rescue
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warn "Couldn't determine dimensions for image #{path}: #{$!.message}"
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end
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end
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end
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super(path, params)
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end
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end
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end
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