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author | Chris <ccbrown112@gmail.com> | 2018-01-22 15:32:50 -0600 |
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committer | GitHub <noreply@github.com> | 2018-01-22 15:32:50 -0600 |
commit | 599991ea731953f772824ce3ed1e591246aa004f (patch) | |
tree | fca0f556f12e56bdcefa74ac6794dec64e04e3fc /utils/markdown/links.go | |
parent | a8445775351c32f8a12081f60bda2099571b2758 (diff) | |
download | chat-599991ea731953f772824ce3ed1e591246aa004f.tar.gz chat-599991ea731953f772824ce3ed1e591246aa004f.tar.bz2 chat-599991ea731953f772824ce3ed1e591246aa004f.zip |
PLT-3383: image proxy support (#7991)
* image proxy support
* go vet fix, remove mistakenly added coverage file
* fix test compile error
* add validation to config settings and documentation to model functions
* add message_source field to post
Diffstat (limited to 'utils/markdown/links.go')
-rw-r--r-- | utils/markdown/links.go | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/utils/markdown/links.go b/utils/markdown/links.go new file mode 100644 index 000000000..419797cb9 --- /dev/null +++ b/utils/markdown/links.go @@ -0,0 +1,130 @@ +// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved. +// See License.txt for license information. + +package markdown + +import ( + "unicode/utf8" +) + +func parseLinkDestination(markdown string, position int) (raw Range, next int, ok bool) { + if position >= len(markdown) { + return + } + + if markdown[position] == '<' { + isEscaped := false + + for offset, c := range []byte(markdown[position+1:]) { + if isEscaped { + isEscaped = false + if isEscapableByte(c) { + continue + } + } + + if c == '\\' { + isEscaped = true + } else if c == '<' { + break + } else if c == '>' { + return Range{position + 1, position + 1 + offset}, position + 1 + offset + 1, true + } else if isWhitespaceByte(c) { + break + } + } + } + + openCount := 0 + isEscaped := false + for offset, c := range []byte(markdown[position:]) { + if isEscaped { + isEscaped = false + if isEscapableByte(c) { + continue + } + } + + switch c { + case '\\': + isEscaped = true + case '(': + openCount++ + case ')': + if openCount < 1 { + return Range{position, position + offset}, position + offset, true + } + openCount-- + default: + if isWhitespaceByte(c) { + return Range{position, position + offset}, position + offset, true + } + } + } + return Range{position, len(markdown)}, len(markdown), true +} + +func parseLinkTitle(markdown string, position int) (raw Range, next int, ok bool) { + if position >= len(markdown) { + return + } + + originalPosition := position + + var closer byte + switch markdown[position] { + case '"', '\'': + closer = markdown[position] + case '(': + closer = ')' + default: + return + } + position++ + + for position < len(markdown) { + switch markdown[position] { + case '\\': + position++ + if position < len(markdown) && isEscapableByte(markdown[position]) { + position++ + } + case closer: + return Range{originalPosition + 1, position}, position + 1, true + default: + position++ + } + } + + return +} + +func parseLinkLabel(markdown string, position int) (raw Range, next int, ok bool) { + if position >= len(markdown) || markdown[position] != '[' { + return + } + + originalPosition := position + position++ + + for position < len(markdown) { + switch markdown[position] { + case '\\': + position++ + if position < len(markdown) && isEscapableByte(markdown[position]) { + position++ + } + case '[': + return + case ']': + if position-originalPosition >= 1000 && utf8.RuneCountInString(markdown[originalPosition:position]) >= 1000 { + return + } + return Range{originalPosition + 1, position}, position + 1, true + default: + position++ + } + } + + return +} |