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# Automatic Image Sizes extension
class Middleman::Extensions::AutomaticImageSizes < ::Middleman::Extension
def initialize(app, options_hash={}, &block)
super
# Include 3rd-party fastimage library
require 'fastimage'
end
helpers do
# Override default image_tag helper to automatically calculate and include
# image dimensions.
#
# @param [String] path
# @param [Hash] params
# @return [String]
def image_tag(path, params={})
if !params.key?(:width) && !params.key?(:height) && !path.include?('://')
real_path = path.dup
real_path = File.join(config[:images_dir], real_path) unless real_path.start_with?('/')
file = app.files.find(:source, real_path) || app.files.find(:source, real_path.sub(/^\//, ''))
if file && file[:full_path].exist?
begin
full_path = file[:full_path].to_s
width, height = ::FastImage.size(full_path, raise_on_failure: true)
# Check for @2x and @3x image
retina = full_path.match(/@(\d)x\.[a-zA-Z]{3,4}$/)
if retina
factor = retina[1].to_i
width /= factor
height /= factor
end
params[:width] = width
params[:height] = height
rescue FastImage::UnknownImageType
# No message, it's just not supported
rescue
warn "Couldn't determine dimensions for image #{path}: #{$ERROR_INFO.message}"
end
end
end
super(path, params)
end
end
end
Version data entries
36 entries across 36 versions & 3 rubygems