From c865301eb74fa7e35cc145b202f69c648f40ccb1 Mon Sep 17 00:00:00 2001
From: Dmitry Degtyarev <kevl@altlinux.org>
Date: Mon, 7 Feb 2022 18:12:15 +0400
Subject: [PATCH] add length limit to string large edit

---
 .../attribute_edits/string_large_edit.cpp     | 22 +++++++++++++++++++
 src/admc/attribute_edits/string_large_edit.h  |  3 +++
 2 files changed, 25 insertions(+)

diff --git a/src/admc/attribute_edits/string_large_edit.cpp b/src/admc/attribute_edits/string_large_edit.cpp
index 923cc900..103ff8f9 100644
--- a/src/admc/attribute_edits/string_large_edit.cpp
+++ b/src/admc/attribute_edits/string_large_edit.cpp
@@ -22,6 +22,7 @@
 
 #include "adldap.h"
 #include "utils.h"
+#include "globals.h"
 
 #include <QPlainTextEdit>
 
@@ -29,10 +30,14 @@ StringLargeEdit::StringLargeEdit(QPlainTextEdit *edit_arg, const QString &attrib
 : AttributeEdit(parent) {
     attribute = attribute_arg;
     edit = edit_arg;
+    ignore_on_text_changed = false;
 
     connect(
         edit, &QPlainTextEdit::textChanged,
         this, &AttributeEdit::edited);
+    connect(
+        edit, &QPlainTextEdit::textChanged,
+        this, &StringLargeEdit::on_text_changed);
 }
 
 void StringLargeEdit::load(AdInterface &ad, const AdObject &object) {
@@ -49,3 +54,20 @@ bool StringLargeEdit::apply(AdInterface &ad, const QString &dn) const {
 
     return success;
 }
+
+// NOTE: this is a custom length limit mechanism
+// because QPlainText doesn't have it built-in
+void StringLargeEdit::on_text_changed() {
+    ignore_on_text_changed = true;
+    {
+        const int range_upper = g_adconfig->get_attribute_range_upper(attribute);
+
+        const QString value = edit->toPlainText();
+
+        if (value.length() > range_upper) {
+            const QString shortened_value = value.left(range_upper);
+            edit->setPlainText(shortened_value);
+        }
+    }
+    ignore_on_text_changed = false;
+}
diff --git a/src/admc/attribute_edits/string_large_edit.h b/src/admc/attribute_edits/string_large_edit.h
index f7031eaf..120c94ca 100644
--- a/src/admc/attribute_edits/string_large_edit.h
+++ b/src/admc/attribute_edits/string_large_edit.h
@@ -41,6 +41,9 @@ public:
 private:
     QPlainTextEdit *edit;
     QString attribute;
+    bool ignore_on_text_changed;
+
+    void on_text_changed();
 };
 
 #endif /* STRING_LARGE_EDIT_H */