From 80b0d855c1fcb477f7937bd6ce4a63dda257ed92 Mon Sep 17 00:00:00 2001
From: Eskil Abrahamsen Blomfeldt <eblomfel@trolltech.com>
Date: Wed, 11 Nov 2009 16:59:37 +0100
Subject: Add option to ingore unused navigation events in QTextControl

QFxTextEdit, as well as systems with keypad navigation, needs the text
control to ignore navigation events that have no effect (like hitting
the right navigation key at the end of the text.) Previously, we would
only support this for keypad navigation. This patch introduces a flag
that you can set to tell the QTextControl to ignore these events. If
the flag is not explicitly set, behavior should remain as before.
The if-test has been refactored to make it more readable.

Done-with: Alan Alpert
Reviewed-by: Samuel
(cherry picked from commit fab1ce65da8bacfce92b1df7656780e729d31b74)
---
 src/gui/text/qtextcontrol.cpp   | 33 ++++++++++++++++++++++++++-------
 src/gui/text/qtextcontrol_p.h   |  4 ++++
 src/gui/text/qtextcontrol_p_p.h |  1 +
 3 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/src/gui/text/qtextcontrol.cpp b/src/gui/text/qtextcontrol.cpp
index 2bfe33c..3149ebf 100644
--- a/src/gui/text/qtextcontrol.cpp
+++ b/src/gui/text/qtextcontrol.cpp
@@ -126,6 +126,7 @@ QTextControlPrivate::QTextControlPrivate()
 #endif
       isEnabled(true),
       hadSelectionOnMousePress(false),
+      ignoreUnusedNavigationEvents(false),
       openExternalLinks(false)
 {}
 
@@ -264,19 +265,25 @@ bool QTextControlPrivate::cursorMoveKeyEvent(QKeyEvent *e)
     cursor.setVisualNavigation(visualNavigation);
     q->ensureCursorVisible();
 
+    bool ignoreNavigationEvents = ignoreUnusedNavigationEvents;
+    bool isNavigationEvent = e->key() == Qt::Key_Up || e->key() == Qt::Key_Down;
+
+#ifdef QT_KEYPAD_NAVIGATION
+    ignoreNavigationEvents = ignoreNavigationEvents || QApplication::keypadNavigationEnabled();
+    isNavigationEvent = isNavigationEvent ||
+                        (QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional
+                         && (e->key() == Qt::Key_Left || e->key() == Qt::Key_Right));
+#else
+    isNavigationEvent = isNavigationEvent || e->key() == Qt::Key_Left || e->key() == Qt::Key_Right;
+#endif
+
     if (moved) {
         if (cursor.position() != oldCursorPos)
             emit q->cursorPositionChanged();
         emit q->microFocusChanged();
-    }
-#ifdef QT_KEYPAD_NAVIGATION
-    else if (QApplication::keypadNavigationEnabled()
-        && ((e->key() == Qt::Key_Up || e->key() == Qt::Key_Down)
-        || QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional
-        && (e->key() == Qt::Key_Left || e->key() == Qt::Key_Right))) {
+    } else if (ignoreNavigationEvents && isNavigationEvent) {
         return false;
     }
-#endif
 
     selectionChanged(/*forceEmitSelectionChanged =*/(mode == QTextCursor::KeepAnchor));
 
@@ -2263,6 +2270,18 @@ bool QTextControl::openExternalLinks() const
     return d->openExternalLinks;
 }
 
+bool QTextControl::ignoreUnusedNavigationEvents() const
+{
+    Q_D(const QTextControl);
+    return d->ignoreUnusedNavigationEvents;
+}
+
+void QTextControl::setIgnoreUnusedNavigationEvents(bool ignore)
+{
+    Q_D(QTextControl);
+    d->ignoreUnusedNavigationEvents = ignore;
+}
+
 void QTextControl::moveCursor(QTextCursor::MoveOperation op, QTextCursor::MoveMode mode)
 {
     Q_D(QTextControl);
diff --git a/src/gui/text/qtextcontrol_p.h b/src/gui/text/qtextcontrol_p.h
index 263af31..bc8e063 100644
--- a/src/gui/text/qtextcontrol_p.h
+++ b/src/gui/text/qtextcontrol_p.h
@@ -95,6 +95,7 @@ class Q_GUI_EXPORT QTextControl : public QObject
     Q_PROPERTY(int cursorWidth READ cursorWidth WRITE setCursorWidth)
     Q_PROPERTY(Qt::TextInteractionFlags textInteractionFlags READ textInteractionFlags WRITE setTextInteractionFlags)
     Q_PROPERTY(bool openExternalLinks READ openExternalLinks WRITE setOpenExternalLinks)
+    Q_PROPERTY(bool ignoreUnusedNavigationEvents READ ignoreUnusedNavigationEvents WRITE setIgnoreUnusedNavigationEvents)
 public:
     explicit QTextControl(QObject *parent = 0);
     explicit QTextControl(const QString &text, QObject *parent = 0);
@@ -163,6 +164,9 @@ public:
     void setOpenExternalLinks(bool open);
     bool openExternalLinks() const;
 
+    void setIgnoreUnusedNavigationEvents(bool ignore);
+    bool ignoreUnusedNavigationEvents() const;
+
     void moveCursor(QTextCursor::MoveOperation op, QTextCursor::MoveMode mode = QTextCursor::MoveAnchor);
 
     bool canPaste() const;
diff --git a/src/gui/text/qtextcontrol_p_p.h b/src/gui/text/qtextcontrol_p_p.h
index 66459f6..c230512 100644
--- a/src/gui/text/qtextcontrol_p_p.h
+++ b/src/gui/text/qtextcontrol_p_p.h
@@ -206,6 +206,7 @@ public:
     QString anchorOnMousePress;
     bool hadSelectionOnMousePress;
 
+    bool ignoreUnusedNavigationEvents;
     bool openExternalLinks;
 
     QString linkToCopy;
-- 
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