1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
require 'nokogiri'
module GitlabMarkdownHelper
include PreferencesHelper
# Use this in places where you would normally use link_to(gfm(...), ...).
#
# It solves a problem occurring with nested links (i.e.
# "<a>outer text <a>gfm ref</a> more outer text</a>"). This will not be
# interpreted as intended. Browsers will parse something like
# "<a>outer text </a><a>gfm ref</a> more outer text" (notice the last part is
# not linked any more). link_to_gfm corrects that. It wraps all parts to
# explicitly produce the correct linking behavior (i.e.
# "<a>outer text </a><a>gfm ref</a><a> more outer text</a>").
def link_to_gfm(body, url, html_options = {})
return "" if body.blank?
escaped_body = if body =~ /\A\<img/
body
else
escape_once(body)
end
gfm_body = Gitlab::Markdown.gfm(escaped_body, project: @project, current_user: current_user)
fragment = Nokogiri::XML::DocumentFragment.parse(gfm_body)
if fragment.children.size == 1 && fragment.children[0].name == 'a'
# Fragment has only one node, and it's a link generated by `gfm`.
# Replace it with our requested link.
text = fragment.children[0].text
fragment.children[0].replace(link_to(text, url, html_options))
else
# Traverse the fragment's first generation of children looking for pure
# text, wrapping anything found in the requested link
fragment.children.each do |node|
next unless node.text?
node.replace(link_to(node.text, url, html_options))
end
end
# Add any custom CSS classes to the GFM-generated reference links
if html_options[:class]
fragment.css('a.gfm').add_class(html_options[:class])
end
fragment.to_html.html_safe
end
def markdown(text, context = {})
context.merge!(
current_user: current_user,
project: @project,
project_wiki: @project_wiki,
ref: @ref,
requested_path: @path
)
Gitlab::Markdown.render(text, context)
end
# TODO (rspeicher): Remove all usages of this helper and just call `markdown`
# with a custom pipeline depending on the content being rendered
def gfm(text, options = {})
markdown(text, options)
end
def asciidoc(text)
Gitlab::Asciidoc.render(text, {
commit: @commit,
project: @project,
project_wiki: @project_wiki,
requested_path: @path,
ref: @ref
})
end
# Return the first line of +text+, up to +max_chars+, after parsing the line
# as Markdown. HTML tags in the parsed output are not counted toward the
# +max_chars+ limit. If the length limit falls within a tag's contents, then
# the tag contents are truncated without removing the closing tag.
def first_line_in_markdown(text, max_chars = nil, options = {})
md = markdown(text, options).strip
truncate_visible(md, max_chars || md.length) if md.present?
end
def render_wiki_content(wiki_page)
case wiki_page.format
when :markdown
markdown(wiki_page.content)
when :asciidoc
asciidoc(wiki_page.content)
else
wiki_page.formatted_content.html_safe
end
end
MARKDOWN_TIPS = [
"End a line with two or more spaces for a line-break, or soft-return",
"Inline code can be denoted by `surrounding it with backticks`",
"Blocks of code can be denoted by three backticks ``` or four leading spaces",
"Emoji can be added by :emoji_name:, for example :thumbsup:",
"Notify other participants using @user_name",
"Notify a specific group using @group_name",
"Notify the entire team using @all",
"Reference an issue using a hash, for example issue #123",
"Reference a merge request using an exclamation point, for example MR !123",
"Italicize words or phrases using *asterisks* or _underscores_",
"Bold words or phrases using **double asterisks** or __double underscores__",
"Strikethrough words or phrases using ~~two tildes~~",
"Make a bulleted list using + pluses, - minuses, or * asterisks",
"Denote blockquotes using > at the beginning of a line",
"Make a horizontal line using three or more hyphens ---, asterisks ***, or underscores ___"
].freeze
# Returns a random markdown tip for use as a textarea placeholder
def random_markdown_tip
MARKDOWN_TIPS.sample
end
private
# Return +text+, truncated to +max_chars+ characters, excluding any HTML
# tags.
def truncate_visible(text, max_chars)
doc = Nokogiri::HTML.fragment(text)
content_length = 0
truncated = false
doc.traverse do |node|
if node.text? || node.content.empty?
if truncated
node.remove
next
end
# Handle line breaks within a node
if node.content.strip.lines.length > 1
node.content = "#{node.content.lines.first.chomp}..."
truncated = true
end
num_remaining = max_chars - content_length
if node.content.length > num_remaining
node.content = node.content.truncate(num_remaining)
truncated = true
end
content_length += node.content.length
end
truncated = truncate_if_block(node, truncated)
end
doc.to_html
end
# Used by #truncate_visible. If +node+ is the first block element, and the
# text hasn't already been truncated, then append "..." to the node contents
# and return true. Otherwise return false.
def truncate_if_block(node, truncated)
if node.element? && node.description.block? && !truncated
node.content = "#{node.content}..." if node.next_sibling
true
else
truncated
end
end
# Returns the text necessary to reference `entity` across projects
#
# project - Project to reference
# entity - Object that responds to `to_reference`
#
# Examples:
#
# cross_project_reference(project, project.issues.first)
# # => 'namespace1/project1#123'
#
# cross_project_reference(project, project.merge_requests.first)
# # => 'namespace1/project1!345'
#
# Returns a String
def cross_project_reference(project, entity)
if entity.respond_to?(:to_reference)
"#{project.to_reference}#{entity.to_reference}"
else
''
end
end
end
|