gitlab-org--gitlab-foss/app/presenters/blobs/unfold_presenter.rb

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# frozen_string_literal: true
require 'gt_one_coercion'
module Blobs
class UnfoldPresenter < BlobPresenter
include Virtus.model
include Gitlab::Utils::StrongMemoize
attribute :full, Boolean, default: false
attribute :since, GtOneCoercion
attribute :to, Integer
attribute :bottom, Boolean
attribute :unfold, Boolean, default: true
attribute :offset, Integer
attribute :indent, Integer, default: 0
def initialize(blob, params)
# Load all blob data first as we need to ensure they're all loaded first
# so we can accurately show the rest of the diff when unfolding.
load_all_blob_data
@subject = blob
@all_lines = blob.data.lines
super(params)
self.attributes = prepare_attributes
end
# Returns an array of Gitlab::Diff::Line with match line added
def diff_lines
diff_lines = lines.map.with_index do |line, index|
full_line = limited_blob_lines[index].delete("\n")
Gitlab::Diff::Line.new(full_line, nil, nil, nil, nil, rich_text: line)
end
add_match_line(diff_lines)
diff_lines
end
def lines
strong_memoize(:lines) do
limit(highlight.lines).map(&:html_safe)
end
end
def match_line_text
return '' if bottom?
lines_length = lines.length - 1
line = [since, lines_length].join(',')
"@@ -#{line}+#{line} @@"
end
private
def prepare_attributes
return attributes unless full? || to == -1
full_opts = {
since: 1,
to: all_lines_size,
bottom: false,
unfold: false,
offset: 0,
indent: 0
}
return full_opts if full?
full_opts.merge(attributes.slice(:since))
end
def all_lines_size
strong_memoize(:all_lines_size) do
@all_lines.size
end
end
def add_match_line(diff_lines)
return unless unfold?
return if bottom? && to >= all_lines_size
if bottom? && to < all_lines_size
old_pos = to - offset
new_pos = to
elsif since != 1
old_pos = new_pos = since
end
# Match line is not needed when it reaches the top limit or bottom limit of the file.
return unless new_pos
match_line = Gitlab::Diff::Line.new(match_line_text, 'match', nil, old_pos, new_pos)
bottom? ? diff_lines.push(match_line) : diff_lines.unshift(match_line)
end
def limited_blob_lines
strong_memoize(:limited_blob_lines) do
limit(@all_lines)
end
end
def limit(lines)
return lines if full?
lines[since - 1..to - 1]
end
end
end