Support input method tentative commit string in QLineControl

Implements similar behavior as 8bd40fef0733a4796a308b3bc137a05296e142c4
did for QLineEdit.

Change-Id: I55de1f9a6703aca629f2e84398e481636c96eeca
Reviewed-by: Joona Petrell <joona.t.petrell@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

2 files changed, 49 insertions, 9 deletions

diff --git a/src/gui/text/qlinecontrol.cpp b/src/gui/text/qlinecontrol.cpp
index 7b7b2ac132..91a07d926e 100644
--- a/src/gui/text/qlinecontrol.cpp
+++ b/src/gui/text/qlinecontrol.cpp
@@ -347,6 +347,30 @@ QRect QLineControl::cursorRect() const
     return QRect(cix-5, 0, w+9, ch);
 }
 
+QString QLineControl::text() const
+{
+    QString content = m_text;
+    if (!m_tentativeCommit.isEmpty())
+        content.insert(m_cursor, m_tentativeCommit);
+    QString res = m_maskData ? stripString(content) : content;
+    return (res.isNull() ? QString::fromLatin1("") : res);
+}
+
+// like text() but doesn't include preedit
+QString QLineControl::realText() const
+{
+    QString res = m_maskData ? stripString(m_text) : m_text;
+    return (res.isNull() ? QString::fromLatin1("") : res);
+}
+
+void QLineControl::setText(const QString &txt)
+{
+    if (composeMode())
+        qApp->inputPanel()->reset();
+    m_tentativeCommit.clear();
+    internalSetText(txt, -1, false);
+}
+
 /*!
     \internal
 
@@ -414,7 +438,7 @@ void QLineControl::moveCursor(int pos, bool mark)
 */
 void QLineControl::processInputMethodEvent(QInputMethodEvent *event)
 {
-    int priorState = 0;
+    int priorState = -1;
     bool isGettingInput = !event->commitString().isEmpty()
             || event->preeditString() != preeditAreaText()
             || event->replacementLength() > 0;
@@ -499,7 +523,15 @@ void QLineControl::processInputMethodEvent(QInputMethodEvent *event)
         emitCursorPositionChanged();
     else if (m_preeditCursor != oldPreeditCursor)
         emit updateMicroFocus();
-    if (isGettingInput)
+
+    bool tentativeCommitChanged = (m_tentativeCommit != event->tentativeCommitString());
+
+    if (tentativeCommitChanged) {
+        m_textDirty = true;
+        m_tentativeCommit = event->tentativeCommitString();
+    }
+
+    if (isGettingInput || tentativeCommitChanged)
         finishChange(priorState);
 
     if (selectionChange)
@@ -598,7 +630,6 @@ bool QLineControl::finishChange(int validateFromState, bool update, bool edited)
         m_validInput = true;
 #ifndef QT_NO_VALIDATOR
         if (m_validator) {
-            m_validInput = false;
             QString textCopy = m_text;
             int cursorCopy = m_cursor;
             m_validInput = (m_validator->validate(textCopy, cursorCopy) != QValidator::Invalid);
@@ -608,6 +639,15 @@ bool QLineControl::finishChange(int validateFromState, bool update, bool edited)
                     return true;
                 }
                 m_cursor = cursorCopy;
+
+                if (!m_tentativeCommit.isEmpty()) {
+                    textCopy.insert(m_cursor, m_tentativeCommit);
+                    bool validInput = (m_validator->validate(textCopy, cursorCopy) != QValidator::Invalid);
+                    if (!validInput)
+                        m_tentativeCommit.clear();
+                }
+            } else {
+                m_tentativeCommit.clear();
             }
         }
 #endif
diff --git a/src/gui/text/qlinecontrol_p.h b/src/gui/text/qlinecontrol_p.h
index e5435c22f6..7f5244ee07 100644
--- a/src/gui/text/qlinecontrol_p.h
+++ b/src/gui/text/qlinecontrol_p.h
@@ -61,6 +61,7 @@
 #include "QtGui/qvalidator.h"
 #include "QtGui/qpalette.h"
 #include "QtGui/qguiapplication.h"
+#include "QtGui/qinputpanel.h"
 #include "QtCore/qpoint.h"
 
 QT_BEGIN_HEADER
@@ -205,12 +206,10 @@ public:
     bool isReadOnly() const { return m_readOnly; }
     void setReadOnly(bool enable) { m_readOnly = enable; }
 
-    QString text() const
-    {
-        QString res = m_maskData ? stripString(m_text) : m_text;
-        return (res.isNull() ? QString::fromLatin1("") : res);
-    }
-    void setText(const QString &txt) { internalSetText(txt, -1, false); }
+    QString text() const;
+    QString realText() const;
+    void setText(const QString &txt);
+
     QString displayText() const { return m_textLayout.text(); }
 
     void backspace();
@@ -347,6 +346,7 @@ private:
     int m_cursor;
     int m_preeditCursor;
     int m_cursorWidth;
+    QString m_tentativeCommit;
     Qt::LayoutDirection m_layoutDirection;
     uint m_hideCursor : 1; // used to hide the m_cursor inside preedit areas
     uint m_separator : 1;