diff options
Diffstat (limited to 'utils/markdown/reference_definition.go')
-rw-r--r-- | utils/markdown/reference_definition.go | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/utils/markdown/reference_definition.go b/utils/markdown/reference_definition.go new file mode 100644 index 000000000..e2d0be350 --- /dev/null +++ b/utils/markdown/reference_definition.go @@ -0,0 +1,75 @@ +// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved. +// See License.txt for license information. + +package markdown + +type ReferenceDefinition struct { + RawDestination Range + + markdown string + rawLabel string + rawTitle string +} + +func (d *ReferenceDefinition) Destination() string { + return Unescape(d.markdown[d.RawDestination.Position:d.RawDestination.End]) +} + +func (d *ReferenceDefinition) Label() string { + return d.rawLabel +} + +func (d *ReferenceDefinition) Title() string { + return Unescape(d.rawTitle) +} + +func parseReferenceDefinition(markdown string, ranges []Range) (*ReferenceDefinition, []Range) { + raw := "" + for _, r := range ranges { + raw += markdown[r.Position:r.End] + } + + label, next, ok := parseLinkLabel(raw, 0) + if !ok { + return nil, nil + } + position := next + + if position >= len(raw) || raw[position] != ':' { + return nil, nil + } + position++ + + destination, next, ok := parseLinkDestination(raw, nextNonWhitespace(raw, position)) + if !ok { + return nil, nil + } + position = next + + absoluteDestination := relativeToAbsolutePosition(ranges, destination.Position) + ret := &ReferenceDefinition{ + RawDestination: Range{absoluteDestination, absoluteDestination + destination.End - destination.Position}, + markdown: markdown, + rawLabel: raw[label.Position:label.End], + } + + if position < len(raw) && isWhitespaceByte(raw[position]) { + title, next, ok := parseLinkTitle(raw, nextNonWhitespace(raw, position)) + if !ok { + if nextLine, skippedNonWhitespace := nextLine(raw, position); !skippedNonWhitespace { + return ret, trimBytesFromRanges(ranges, nextLine) + } + return nil, nil + } + if nextLine, skippedNonWhitespace := nextLine(raw, next); !skippedNonWhitespace { + ret.rawTitle = raw[title.Position:title.End] + return ret, trimBytesFromRanges(ranges, nextLine) + } + } + + if nextLine, skippedNonWhitespace := nextLine(raw, position); !skippedNonWhitespace { + return ret, trimBytesFromRanges(ranges, nextLine) + } + + return nil, nil +} |