Accept PUA characters, ZWNJ and ZWJ as input in TextInput/Edit

Private Use Area characters are quite valid input characters when used
in combination with a custom font. Joiners also serve an important language
purpose in semitic writing systems.

[ChangeLog][QtWidgets][Input] Support characters in Private Use Area, as well as
zero-width joiners and zero-width non-joiners in input in TextInput and TextEdit.

Task-number: QTBUG-42074
Task-number: QTBUG-57003
Change-Id: I4a9d6b9ea172d29375c20abfb7aebb6748c5d300
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/src/quick/items/qquicktextcontrol.cpp b/src/quick/items/qquicktextcontrol.cpp
index 887cc6fea7..66936b0943 100644
--- a/src/quick/items/qquicktextcontrol.cpp
+++ b/src/quick/items/qquicktextcontrol.cpp
@@ -608,7 +608,7 @@ void QQuickTextControl::clear()
 }
 
 QQuickTextControl::QQuickTextControl(QTextDocument *doc, QObject *parent)
-    : QObject(*new QQuickTextControlPrivate, parent)
+    : QInputControl(TextEdit, *new QQuickTextControlPrivate, parent)
 {
     Q_D(QQuickTextControl);
     Q_ASSERT(doc);
@@ -980,8 +980,7 @@ void QQuickTextControlPrivate::keyPressEvent(QKeyEvent *e)
 
 process:
     {
-        QString text = e->text();
-        if (!text.isEmpty() && (text.at(0).isPrint() || text.at(0) == QLatin1Char('\t'))) {
+        if (q->isAcceptableInput(e)) {
             if (overwriteMode
                 // no need to call deleteChar() if we have a selection, insertText
                 // does it already
@@ -990,7 +989,7 @@ process:
                 cursor.deleteChar();
             }
 
-            cursor.insertText(text);
+            cursor.insertText(e->text());
             selectionChanged();
         } else {
             e->ignore();