Editor: implement find next/previous selected text.

Add actions to search next/previous occurence of the selected text/text
under the cursor, like in Visual Studio (ctrl+F3 and ctrl+shift+F3).

Task-number: QTCREATORBUG-464

Change-Id: I0bf44e386b91fce4b26c6e3864e6df484f2e3556
Reviewed-by: Andre Hartmann <aha_1980@gmx.de>
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>
Reviewed-by: Yuchen Deng <loaden@gmail.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

doc/src/howto/creator-keyboard-shortcuts.qdoc

@@ -417,6 +417,12 @@
         \row
             \o Find previous
             \o Shift+F3
+        \row
+            \o Find next occurence of selected text
+            \o Ctrl+F3
+        \row
+            \o Find previous occurence of selected text
+            \o Ctrl+Shift+F3
         \row
             \o Replace next
             \o Ctrl+=

src/plugins/find/findtoolbar.cpp

@@ -183,6 +183,18 @@ FindToolBar::FindToolBar(FindPlugin *plugin, CurrentDocumentFind *currentDocumen
     connect(m_findPreviousAction, SIGNAL(triggered()), this, SLOT(invokeFindPrevious()));
     m_ui.findPreviousButton->setDefaultAction(cmd->action());
 
+    m_findNextSelectedAction = new QAction(tr("Find Next (Selected)"), this);
+    cmd = am->registerAction(m_findNextSelectedAction, Constants::FIND_NEXT_SELECTED, globalcontext);
+    cmd->setDefaultKeySequence(QKeySequence(tr("Ctrl+F3")));
+    mfind->addAction(cmd, Constants::G_FIND_ACTIONS);
+    connect(m_findNextSelectedAction, SIGNAL(triggered()), this, SLOT(findNextSelected()));
+
+    m_findPreviousSelectedAction = new QAction(tr("Find Previous (Selected)"), this);
+    cmd = am->registerAction(m_findPreviousSelectedAction, Constants::FIND_PREV_SELECTED, globalcontext);
+    cmd->setDefaultKeySequence(QKeySequence(tr("Ctrl+Shift+F3")));
+    mfind->addAction(cmd, Constants::G_FIND_ACTIONS);
+    connect(m_findPreviousSelectedAction, SIGNAL(triggered()), this, SLOT(findPreviousSelected()));
+
     m_replaceAction = new QAction(tr("Replace"), this);
     cmd = am->registerAction(m_replaceAction, Constants::REPLACE, globalcontext);
     cmd->setDefaultKeySequence(QKeySequence());
@@ -327,7 +339,10 @@ void FindToolBar::adaptToCandidate()
 
 void FindToolBar::updateFindAction()
 {
-    m_findInDocumentAction->setEnabled(m_currentDocumentFind->candidateIsEnabled());
+    bool enabled = m_currentDocumentFind->candidateIsEnabled();
+    m_findInDocumentAction->setEnabled(enabled);
+    m_findNextSelectedAction->setEnabled(enabled);
+    m_findPreviousSelectedAction->setEnabled(enabled);
 }
 
 void FindToolBar::updateToolBar()
@@ -605,13 +620,13 @@ Core::FindToolBarPlaceHolder *FindToolBar::findToolBarPlaceHolder() const
     return 0;
 }
 
-void FindToolBar::openFind()
+void FindToolBar::openFind(bool focus)
 {
     setBackward(false);
-    openFindToolBar();
+    openFindToolBar(focus);
 }
 
-void FindToolBar::openFindToolBar()
+void FindToolBar::openFindToolBar(bool focus)
 {
     installEventFilters();
     if (!m_currentDocumentFind->candidateIsEnabled())
@@ -627,13 +642,27 @@ void FindToolBar::openFindToolBar()
     holder->setWidget(this);
     holder->setVisible(true);
     setVisible(true);
-    setFocus();
+    if (focus)
+        setFocus();
     QString text = m_currentDocumentFind->currentFindString();
     if (!text.isEmpty())
         setFindText(text);
     m_currentDocumentFind->defineFindScope();
     m_currentDocumentFind->highlightAll(getFindText(), effectiveFindFlags());
-    selectFindText();
+    if (focus)
+        selectFindText();
+}
+
+void FindToolBar::findNextSelected()
+{
+    openFind(false);
+    invokeFindNext();
+}
+
+void FindToolBar::findPreviousSelected()
+{
+    openFind(false);
+    invokeFindPrevious();
 }
 
 bool FindToolBar::focusNextPrevChild(bool next)

src/plugins/find/findtoolbar.h

@@ -60,7 +60,7 @@ public:
     void readSettings();
     void writeSettings();
 
-    void openFindToolBar();
+    void openFindToolBar(bool focus = true);
     void setUseFakeVim(bool on);
 
 public slots:
@@ -84,7 +84,9 @@ private slots:
     void updateFromFindClipboard();
 
     void hideAndResetFocus();
-    void openFind();
+    void openFind(bool focus = true);
+    void findNextSelected();
+    void findPreviousSelected();
     void updateFindAction();
     void updateToolBar();
     void findFlagsChanged();
@@ -121,6 +123,8 @@ private:
     QCompleter *m_findCompleter;
     QCompleter *m_replaceCompleter;
     QAction *m_findInDocumentAction;
+    QAction *m_findNextSelectedAction;
+    QAction *m_findPreviousSelectedAction;
     QAction *m_enterFindStringAction;
     QAction *m_findNextAction;
     QAction *m_findPreviousAction;

src/plugins/find/textfindconstants.h

@@ -51,6 +51,8 @@ const char G_FIND_ACTIONS[]    = "Find.FindMenu.Actions";
 
 const char ADVANCED_FIND[]     = "Find.Dialog";
 const char FIND_IN_DOCUMENT[]  = "Find.FindInCurrentDocument";
+const char FIND_NEXT_SELECTED[]= "Find.FindNextSelected";
+const char FIND_PREV_SELECTED[]= "Find.FindPreviousSelected";
 const char FIND_NEXT[]         = "Find.FindNext";
 const char FIND_PREVIOUS[]     = "Find.FindPrevious";
 const char REPLACE[]           = "Find.Replace";