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-rw-r--r--xfa/fde/cfde_texteditengine.cpp9
1 files changed, 8 insertions, 1 deletions
diff --git a/xfa/fde/cfde_texteditengine.cpp b/xfa/fde/cfde_texteditengine.cpp
index 87dba53158..3363baa0cd 100644
--- a/xfa/fde/cfde_texteditengine.cpp
+++ b/xfa/fde/cfde_texteditengine.cpp
@@ -274,7 +274,14 @@ void CFDE_TextEditEngine::Insert(size_t idx,
// If we're going to be too big we insert what we can and notify the
// delegate we've filled the text after the insert is done.
bool exceeded_limit = false;
- if (has_character_limit_ && text_length_ + length > character_limit_) {
+
+ // Currently we allow inserting a number of characters over the text limit if
+ // the text edit is already empty. This allows supporting text fields which
+ // do formatting. Otherwise, if you enter 123456789 for an SSN into a field
+ // with a 9 character limit and we reformat to 123-45-6789 we'll truncate
+ // the 89 when inserting into the text edit. See https://crbug.com/pdfium/1089
+ if (has_character_limit_ && text_length_ > 0 &&
+ text_length_ + length > character_limit_) {
exceeded_limit = true;
length = character_limit_ - text_length_;
}