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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| module DownloadHelper | ||
| def self.download_to_file(uri) | ||
| begin | ||
| stream = URI.open(uri, :read_timeout => 10) | ||
| return stream if stream.respond_to?(:path) # Already file-like | ||
|
|
||
| # Workaround when open(uri) doesn't return File | ||
| Tempfile.new.tap do |file| | ||
| file.binmode | ||
| IO.copy_stream(stream, file) | ||
| stream.close | ||
| file.rewind | ||
| end | ||
| rescue Net::ReadTimeout | ||
| return 'failed' | ||
| end | ||
| end | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| module ExportHelper | ||
| def self.sanitize_filename(filename) | ||
| filename.gsub(/[\x00\/\\:\*\?\"<>\|]/, "_").strip | ||
| end | ||
|
|
||
| def self.get_path(link, current_depth) | ||
| document_id = link[:document_id] | ||
| highlight_uid = link[:highlight_uid] | ||
| # get a relative URL to a document by id, taking into account the current location | ||
| begin | ||
| document = Document.find(document_id) | ||
| filename = self.sanitize_filename(document.title).parameterize | ||
| path_segments = ["#{filename}.html"] | ||
| while document[:parent_type] != "Project" | ||
| # back out from the target document until we hit the project root | ||
| document = document.parent | ||
| path_segments.unshift(self.sanitize_filename(document[:title]).parameterize) | ||
| end | ||
| to_project_root = current_depth > 0 ? Array.new(current_depth, "..").join("/") + "/" : "" | ||
| path = to_project_root + path_segments.join("/") | ||
| if highlight_uid.present? | ||
| # append #highlight_uid to url if present in order to target the highlight | ||
| path = "#{path}#highlight-#{highlight_uid}" | ||
| end | ||
| return path | ||
| rescue ActiveRecord::RecordNotFound | ||
| return "#" | ||
| end | ||
| end | ||
|
|
||
| def self.get_svg_styles(obj) | ||
| # convert fabric object style properties to css | ||
| styles = [ | ||
| "stroke: #{obj['stroke']};", | ||
| "fill: #{obj['fill'] || 'transparent'};", | ||
| "stroke-width: 3px;", | ||
| "stroke-linecap: #{obj['strokeLineCap'] || 'butt'};", | ||
| "stroke-dashoffset: #{obj['strokeDashOffset'] || '0'};", | ||
| "stroke-linejoin: #{obj['strokeLineJoin'] || 'miter'};", | ||
| "stroke-miterlimit: #{obj['strokeMiterLimit'] || '4'};", | ||
| "opacity: #{obj['opacity'] || '1'};", | ||
| "visibility: #{obj['visible'] ? 'visible' : 'hidden'};", | ||
| ] | ||
| styles.push("stroke-dasharray: #{obj['strokeDashArray']};") if obj['strokeDashArray'] | ||
| styles.join(" ") | ||
| end | ||
|
|
||
| def self.get_svg_path(paths) | ||
| # convert fabric object path property to svg path | ||
| path = '' | ||
| paths.each_with_index do |ls, i| | ||
| path += " " unless i == 0 | ||
| if ls[0] == "C" | ||
| # C x1 y1, x2 y2, x y | ||
| path += "#{ls[0]} #{ls[1]} #{ls[2]}, #{ls[3]} #{ls[4]}, #{ls[5]} #{ls[6]}" | ||
| elsif ls[0] == "S" or ls[0] == "Q" | ||
| # S x2 y2, x y || Q x1 y1, x y | ||
| path += "#{ls[0]} #{ls[1]} #{ls[2]}, #{ls[3]} #{ls[4]}" | ||
| else | ||
| # M x y || L x y || T x y, etc | ||
| path += ls.join(" ") | ||
| end | ||
| end | ||
| path | ||
| end | ||
|
|
||
| def self.fabric_to_svg(highlights) | ||
| # convert image annotation highlights (fabric objects) to svgs | ||
| svgs = [] | ||
| self.order_highlights(highlights, "canvas", nil).each do |uid, hl| | ||
| svg_hash = JSON.parse(hl[:target]) | ||
| elm = "#{svg_hash['type']}" | ||
| if svg_hash["path"] | ||
| # path | ||
| elm += " d=\"#{self.get_svg_path(svg_hash['path'])}\"" | ||
| elsif svg_hash["points"] | ||
| # polyline | ||
| elm += ' points="' | ||
| elm += svg_hash["points"].map { |pt| "#{pt['x']},#{pt['y']}" }.join(" ") | ||
| elm += '"' | ||
| elsif svg_hash["type"] == "circle" | ||
| # circle | ||
| elm += " r=\"#{svg_hash['radius']}\"" | ||
| cx = svg_hash["left"] | ||
| cy = svg_hash["top"] | ||
| if svg_hash["originX"] == "left" | ||
| cx += svg_hash["radius"] | ||
| cy += svg_hash["radius"] | ||
| end | ||
| elm += " cx=\"#{cx}\" cy=\"#{cy}\"" | ||
| elsif svg_hash["type"] == "rect" | ||
| # rect | ||
| elm += " x=\"#{svg_hash['left']}\" y=\"#{svg_hash['top']}\"" | ||
| elm += " width=\"#{svg_hash['width']}\" height=\"#{svg_hash['height']}\"" | ||
| end | ||
| # common styles | ||
| elm += " style=\"#{self.get_svg_styles(svg_hash)}\"" | ||
| svg_elm = "<#{elm} vector-effect=\"non-scaling-stroke\" />" | ||
| # add link to highlight in footer | ||
| svgs.push("<a id=\"highlight-#{uid}\" href=\"##{uid}\">#{svg_elm}</a>") | ||
| end | ||
| return svgs | ||
| end | ||
|
|
||
| def self.order_highlights(highlights, document_kind, content_html) | ||
| if !content_html.present? and document_kind == "text" | ||
| highlights | ||
| elsif content_html.present? | ||
| # text type document: order by position in text | ||
| highlights.sort_by { |uid, hl| content_html.index(uid) || Float::INFINITY } | ||
| elsif document_kind == "canvas" | ||
| # canvas type document: order highlights by position on page (top to bottom, LTR) | ||
| highlights.sort_by { |uid, hl| | ||
| drawing = JSON.parse(hl[:target]) | ||
| # divide page vertically into 50px blocks; consider all within 50px range to have equal y | ||
| y = (drawing["top"] / 50).floor() | ||
| # then sort by x, unmodified | ||
| x = drawing["left"] | ||
| [y, x] | ||
| } | ||
| end | ||
| end | ||
|
|
||
| def self.get_link_label(link) | ||
| label = link[:document_title] | ||
| if link[:excerpt] and link[:excerpt].length > 0 | ||
| label = "<span>#{link[:title] ? link[:title] : link[:excerpt]}</span>" | ||
| label += " in <em>#{link[:document_title]}</em>" | ||
| end | ||
| label | ||
| end | ||
| end |
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