Handle too long PR titles correctly (#16517) (#16549)

Backport #16517

The CompareAndPullRequestPost handler for POST to /compare
incorrectly handles returning errors to the user. For a start
it does not set the necessary markers to switch SimpleMDE
but it also does not immediately return to the form.

This PR fixes this by setting the appropriate values, fixing
the templates and preventing the suggestion of a too long
title.

Fix #16507

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-07-26 16:49:48 +01:00 committed by GitHub
parent 91527434d0
commit 693275455e
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 64 additions and 4 deletions

35
modules/util/truncate.go Normal file
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@ -0,0 +1,35 @@
// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package util
import "unicode/utf8"
// SplitStringAtByteN splits a string at byte n accounting for rune boundaries. (Combining characters are not accounted for.)
func SplitStringAtByteN(input string, n int) (left, right string) {
if len(input) <= n {
left = input
return
}
if !utf8.ValidString(input) {
left = input[:n-3] + "..."
right = "..." + input[n-3:]
return
}
// in UTF8 "…" is 3 bytes so doesn't really gain us anything...
end := 0
for end <= n-3 {
_, size := utf8.DecodeRuneInString(input[end:])
if end+size > n-3 {
break
}
end += size
}
left = input[:end] + "…"
right = "…" + input[end:]
return
}

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@ -24,6 +24,7 @@ import (
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/upload"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/services/gitdiff"
)
@ -567,6 +568,18 @@ func PrepareCompareDiff(
} else {
title = headBranch
}
if len(title) > 255 {
var trailer string
title, trailer = util.SplitStringAtByteN(title, 255)
if len(trailer) > 0 {
if ctx.Data["content"] != nil {
ctx.Data["content"] = fmt.Sprintf("%s\n\n%s", trailer, ctx.Data["content"])
} else {
ctx.Data["content"] = trailer + "\n"
}
}
}
ctx.Data["title"] = title
ctx.Data["Username"] = headUser.Name
ctx.Data["Reponame"] = headRepo.Name

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@ -1001,10 +1001,14 @@ func CompareAndPullRequestPost(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("repo.pulls.compare_changes")
ctx.Data["PageIsComparePull"] = true
ctx.Data["IsDiffCompare"] = true
ctx.Data["IsRepoToolbarCommits"] = true
ctx.Data["RequireTribute"] = true
ctx.Data["RequireSimpleMDE"] = true
ctx.Data["RequireHighlightJS"] = true
ctx.Data["PullRequestWorkInProgressPrefixes"] = setting.Repository.PullRequest.WorkInProgressPrefixes
ctx.Data["IsAttachmentEnabled"] = setting.Attachment.Enabled
upload.AddUploadContext(ctx, "comment")
ctx.Data["HasIssuesOrPullsWritePermission"] = ctx.Repo.CanWrite(models.UnitTypePullRequests)
var (
repo = ctx.Repo.Repository
@ -1037,6 +1041,14 @@ func CompareAndPullRequestPost(ctx *context.Context) {
return
}
if len(form.Title) > 255 {
var trailer string
form.Title, trailer = util.SplitStringAtByteN(form.Title, 255)
form.Content = trailer + "\n\n" + form.Content
}
middleware.AssignForm(form, ctx.Data)
ctx.HTML(http.StatusOK, tplCompareDiff)
return
}

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@ -176,10 +176,10 @@
{{if .IsNothingToCompare}}
{{if and $.IsSigned $.AllowEmptyPr (not .Repository.IsArchived) }}
<div class="ui segment">{{.i18n.Tr "repo.pulls.nothing_to_compare_and_allow_empty_pr"}}</div>
<div class="ui info message show-form-container">
<div class="ui info message show-form-container" {{if .Flash}}style="display: none"{{end}}>
<button class="ui button green show-form">{{.i18n.Tr "repo.pulls.new"}}</button>
</div>
<div class="pullrequest-form" style="display: none">
<div class="pullrequest-form" {{if not .Flash}}style="display: none"{{end}}>
{{template "repo/issue/new_form" .}}
</div>
{{else}}
@ -192,7 +192,7 @@
</div>
{{else}}
{{if and $.IsSigned (not .Repository.IsArchived)}}
<div class="ui info message show-form-container">
<div class="ui info message show-form-container" {{if .Flash}}style="display: none"{{end}}>
<button class="ui button green show-form">{{.i18n.Tr "repo.pulls.new"}}</button>
</div>
{{else if .Repository.IsArchived}}
@ -201,7 +201,7 @@
</div>
{{end}}
{{if $.IsSigned}}
<div class="pullrequest-form" style="display: none">
<div class="pullrequest-form" {{if not .Flash}}style="display: none"{{end}}>
{{template "repo/issue/new_form" .}}
</div>
{{end}}