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helpers: Fix TrimShortHTML

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Where some tags are siblings of p tag.

Fixes #7081
This commit is contained in:
SatowTakeshi
2020-03-28 01:36:50 +09:00
committed by Bjørn Erik Pedersen
parent 4a39564efe
commit 9c9987535f
2 changed files with 9 additions and 3 deletions
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11
helpers/content.go
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@@ -44,6 +44,7 @@ var (
openingPTag = []byte("<p>")
closingPTag = []byte("</p>")
paragraphIndicator = []byte("<p")
closingIndicator = []byte("</")
)
// ContentSpec provides functionality to render markdown content.
@@ -315,9 +316,13 @@ func (c *ContentSpec) TruncateWordsToWholeSentence(s string) (string, bool) {
// where said tags are the only <p> tags in the input and enclose the content
// of the input (whitespace excluded).
func (c *ContentSpec) TrimShortHTML(input []byte) []byte {
first := bytes.Index(input, paragraphIndicator)
last := bytes.LastIndex(input, paragraphIndicator)
if first == last {
firstOpeningP := bytes.Index(input, paragraphIndicator)
lastOpeningP := bytes.LastIndex(input, paragraphIndicator)
lastClosingP := bytes.LastIndex(input, closingPTag)
lastClosing := bytes.LastIndex(input, closingIndicator)
if firstOpeningP == lastOpeningP && lastClosingP == lastClosing {
input = bytes.TrimSpace(input)
input = bytes.TrimPrefix(input, openingPTag)
input = bytes.TrimSuffix(input, closingPTag)