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module DiffHelper
def diff_view
params[:view] == 'parallel' ? 'parallel' : 'inline'
end
def allowed_diff_size
if diff_hard_limit_enabled?
Commit::DIFF_HARD_LIMIT_FILES
else
Commit::DIFF_SAFE_FILES
end
end
def allowed_diff_lines
if diff_hard_limit_enabled?
Commit::DIFF_HARD_LIMIT_LINES
else
Commit::DIFF_SAFE_LINES
end
end
def safe_diff_files(diffs)
lines = 0
safe_files = []
diffs.first(allowed_diff_size).each do |diff|
lines += diff.diff.lines.count
break if lines > allowed_diff_lines
safe_files << Gitlab::Diff::File.new(diff)
end
safe_files
end
def diff_hard_limit_enabled?
# Enabling hard limit allows user to see more diff information
if params[:force_show_diff].present?
true
else
false
end
end
def generate_line_code(file_path, line)
Gitlab::Diff::LineCode.generate(file_path, line.new_pos, line.old_pos)
end
def parallel_diff(diff_file, index)
lines = []
skip_next = false
# Building array of lines
#
# [
# left_type, left_line_number, left_line_content, left_line_code,
# right_line_type, right_line_number, right_line_content, right_line_code
# ]
#
diff_file.diff_lines.each do |line|
full_line = line.text
type = line.type
line_code = generate_line_code(diff_file.file_path, line)
line_new = line.new_pos
line_old = line.old_pos
next_line = diff_file.next_line(line.index)
if next_line
next_line_code = generate_line_code(diff_file.file_path, next_line)
next_type = next_line.type
next_line = next_line.text
end
if type == 'match' || type.nil?
# line in the right panel is the same as in the left one
line = [type, line_old, full_line, line_code, type, line_new, full_line, line_code]
lines.push(line)
elsif type == 'old'
if next_type == 'new'
# Left side has text removed, right side has text added
line = [type, line_old, full_line, line_code, next_type, line_new, next_line, next_line_code]
lines.push(line)
skip_next = true
elsif next_type == 'old' || next_type.nil?
# Left side has text removed, right side doesn't have any change
# No next line code, no new line number, no new line text
line = [type, line_old, full_line, line_code, next_type, nil, " ", nil]
lines.push(line)
end
elsif type == 'new'
if skip_next
# Change has been already included in previous line so no need to do it again
skip_next = false
next
else
# Change is only on the right side, left side has no change
line = [nil, nil, " ", line_code, type, line_new, full_line, line_code]
lines.push(line)
end
end
end
lines
end
def unfold_bottom_class(bottom)
(bottom) ? 'js-unfold-bottom' : ''
end
def unfold_class(unfold)
(unfold) ? 'unfold js-unfold' : ''
end
def diff_line_content(line)
if line.blank?
" "
else
line
end
end
def line_comments
@line_comments ||= @line_notes.select(&:active?).group_by(&:line_code)
end
def organize_comments(type_left, type_right, line_code_left, line_code_right)
comments_left = comments_right = nil
unless type_left.nil? && type_right == 'new'
comments_left = line_comments[line_code_left]
end
unless type_left.nil? && type_right.nil?
comments_right = line_comments[line_code_right]
end
[comments_left, comments_right]
end
def inline_diff_btn
diff_btn('Inline', 'inline', diff_view == 'inline')
end
def parallel_diff_btn
diff_btn('Side-by-side', 'parallel', diff_view == 'parallel')
end
def submodule_link(blob, ref, repository = @repository)
tree, commit = submodule_links(blob, ref, repository)
commit_id = if commit.nil?
Commit.truncate_sha(blob.id)
else
link_to Commit.truncate_sha(blob.id), commit
end
[
content_tag(:span, link_to(truncate(blob.name, length: 40), tree)),
'@',
content_tag(:span, commit_id, class: 'monospace'),
].join(' ').html_safe
end
def commit_for_diff(diff)
if diff.deleted_file
first_commit = @first_commit || @commit
first_commit.parent || @first_commit
else
@commit
end
end
def diff_file_html_data(project, diff_commit, diff_file)
{
blob_diff_path: namespace_project_blob_diff_path(project.namespace, project,
tree_join(diff_commit.id, diff_file.file_path))
}
end
def editable_diff?(diff)
!diff.deleted_file && @merge_request && @merge_request.source_project
end
private
def diff_btn(title, name, selected)
params_copy = params.dup
params_copy[:view] = name
# Always use HTML to handle case where JSON diff rendered this button
params_copy.delete(:format)
link_to url_for(params_copy), id: "#{name}-diff-btn", class: (selected ? 'btn active' : 'btn') do
title
end
end
end