Display specific message if diff is not displayed because of too long line (#15611)

* 7184-  message if line too long

* Update options/locale/locale_en-US.ini

Co-authored-by: silverwind <me@silverwind.io>

* add flag on missing cases

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Andrew Thornton <art27@cantab.net>

options/locale/locale_en-US.ini

@@ -1887,6 +1887,7 @@ diff.file_image_width = Width
 diff.file_image_height = Height
 diff.file_byte_size = Size
 diff.file_suppressed = File diff suppressed because it is too large
+diff.file_suppressed_line_too_long = File diff suppressed because one or more lines are too long
 diff.too_many_files = Some files were not shown because too many files changed in this diff
 diff.comment.placeholder = Leave a comment
 diff.comment.markdown_info = Styling with markdown is supported.

services/gitdiff/gitdiff.go

@@ -588,6 +588,7 @@ type DiffFile struct {
 	IsSubmodule             bool
 	Sections                []*DiffSection
 	IsIncomplete            bool
+	IsIncompleteLineTooLong bool
 	IsProtected             bool
 }
 
@@ -935,6 +936,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
 	for {
 		for isFragment {
 			curFile.IsIncomplete = true
+			curFile.IsIncompleteLineTooLong = true
 			_, isFragment, err = input.ReadLine()
 			if err != nil {
 				// Now by the definition of ReadLine this cannot be io.EOF
@@ -1062,6 +1064,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
 		line := string(lineBytes)
 		if isFragment {
 			curFile.IsIncomplete = true
+			curFile.IsIncompleteLineTooLong = true
 			for isFragment {
 				lineBytes, isFragment, err = input.ReadLine()
 				if err != nil {
@@ -1073,6 +1076,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
 		}
 		if len(line) > maxLineCharacters {
 			curFile.IsIncomplete = true
+			curFile.IsIncompleteLineTooLong = true
 			line = line[:maxLineCharacters]
 		}
 		curSection.Lines[len(curSection.Lines)-1].Content = line

templates/repo/diff/box.tmpl

@@ -53,7 +53,13 @@
 						</div>
 						<span class="file mono">{{$file.Name}}</span>
 						<div class="diff-file-header-actions df ac">
-							<div class="text grey">{{$.i18n.Tr "repo.diff.file_suppressed"}}</div>
+							<div class="text grey">
+								{{if $file.IsIncompleteLineTooLong}}
+									{{$.i18n.Tr "repo.diff.file_suppressed_line_too_long"}}
+								{{else}}
+									{{$.i18n.Tr "repo.diff.file_suppressed"}}
+								{{end}}
+							</div>
 							{{if $file.IsProtected}}
 								<span class="ui basic label">{{$.i18n.Tr "repo.diff.protected"}}</span>
 							{{end}}