WebTab: Fix detaching completer and site icon

Fixes crash when detaching tab and closing the originating window.

autotests/webtabtest.cpp

@@ -30,12 +30,12 @@ void WebTabTest::cleanupTestCase()
 
 void WebTabTest::parentChildTabsTest()
 {
-    WebTab tab1(mApp->getWindow());
-    WebTab tab2(mApp->getWindow());
-    WebTab tab3(mApp->getWindow());
-    WebTab tab4(mApp->getWindow());
-    WebTab tab5(mApp->getWindow());
-    WebTab tab6(mApp->getWindow());
+    WebTab tab1;
+    WebTab tab2;
+    WebTab tab3;
+    WebTab tab4;
+    WebTab tab5;
+    WebTab tab6;
 
     tab1.addChildTab(&tab2);
     QCOMPARE(tab1.childTabs(), QVector<WebTab*>{&tab2});

src/lib/navigation/locationbar.cpp

@@ -42,9 +42,9 @@
 #include <QContextMenuEvent>
 #include <QStyleOptionFrameV3>
 
-LocationBar::LocationBar(BrowserWindow* window)
-    : LineEdit(window)
-    , m_window(window)
+LocationBar::LocationBar(QWidget *parent)
+    : LineEdit(parent)
+    , m_window(nullptr)
     , m_webView(0)
     , m_holdingAlt(false)
     , m_oldTextLength(0)
@@ -60,7 +60,7 @@ LocationBar::LocationBar(BrowserWindow* window)
 
     m_bookmarkIcon = new BookmarksIcon(this);
     m_goIcon = new GoIcon(this);
-    m_siteIcon = new SiteIcon(m_window, this);
+    m_siteIcon = new SiteIcon(this);
     m_autofillIcon = new AutoFillIcon(this);
     DownIcon* down = new DownIcon(this);
 
@@ -71,7 +71,6 @@ LocationBar::LocationBar(BrowserWindow* window)
     addWidget(down, LineEdit::RightSide);
 
     m_completer = new LocationCompleter(this);
-    m_completer->setMainWindow(m_window);
     m_completer->setLocationBar(this);
     connect(m_completer, SIGNAL(showCompletion(QString,bool)), this, SLOT(showCompletion(QString,bool)));
     connect(m_completer, SIGNAL(showDomainCompletion(QString)), this, SLOT(showDomainCompletion(QString)));
@@ -112,6 +111,18 @@ LocationBar::LocationBar(BrowserWindow* window)
     QTimer::singleShot(0, this, SLOT(updatePlaceHolderText()));
 }
 
+BrowserWindow *LocationBar::browserWindow() const
+{
+    return m_window;
+}
+
+void LocationBar::setBrowserWindow(BrowserWindow *window)
+{
+    m_window = window;
+    m_completer->setMainWindow(m_window);
+    m_siteIcon->setBrowserWindow(m_window);
+}
+
 TabbedWebView* LocationBar::webView() const
 {
     return m_webView;
@@ -475,7 +486,7 @@ void LocationBar::focusInEvent(QFocusEvent* event)
     clearTextFormat();
     LineEdit::focusInEvent(event);
 
-    if (Settings().value("Browser-View-Settings/instantBookmarksToolbar").toBool()) {
+    if (m_window && Settings().value("Browser-View-Settings/instantBookmarksToolbar").toBool()) {
         m_window->bookmarksToolbar()->show();
     }
 }
@@ -498,7 +509,7 @@ void LocationBar::focusOutEvent(QFocusEvent* event)
 
     refreshTextFormat();
 
-    if (Settings().value("Browser-View-Settings/instantBookmarksToolbar").toBool()) {
+    if (m_window && Settings().value("Browser-View-Settings/instantBookmarksToolbar").toBool()) {
         m_window->bookmarksToolbar()->hide();
     }
 }
@@ -577,7 +588,9 @@ void LocationBar::keyPressEvent(QKeyEvent* event)
 
         case Qt::AltModifier:
             m_completer->closePopup();
-            m_window->tabWidget()->addView(loadAction(text()).loadRequest);
+            if (m_window) {
+                m_window->tabWidget()->addView(loadAction(text()).loadRequest);
+            }
             m_holdingAlt = false;
             break;
 

src/lib/navigation/locationbar.h

@@ -40,7 +40,7 @@ class FALKON_EXPORT LocationBar : public LineEdit
     Q_OBJECT
 
 public:
-    explicit LocationBar(BrowserWindow* window);
+    explicit LocationBar(QWidget *parent = nullptr);
 
     struct LoadAction {
         enum Type {
@@ -55,6 +55,10 @@ public:
         LoadRequest loadRequest;
     };
 
+    // BrowserWindow can be null!
+    BrowserWindow *browserWindow() const;
+    void setBrowserWindow(BrowserWindow *window);
+
     TabbedWebView* webView() const;
     void setWebView(TabbedWebView* view);
 

src/lib/navigation/siteicon.cpp

@@ -28,9 +28,9 @@
 #include <QApplication>
 #include <QContextMenuEvent>
 
-SiteIcon::SiteIcon(BrowserWindow* window, LocationBar* parent)
+SiteIcon::SiteIcon(LocationBar *parent)
     : ToolButton(parent)
-    , m_window(window)
+    , m_window(nullptr)
     , m_locationBar(parent)
     , m_view(0)
 {
@@ -46,6 +46,11 @@ SiteIcon::SiteIcon(BrowserWindow* window, LocationBar* parent)
     connect(m_updateTimer, SIGNAL(timeout()), this, SLOT(updateIcon()));
 }
 
+void SiteIcon::setBrowserWindow(BrowserWindow *window)
+{
+    m_window = window;
+}
+
 void SiteIcon::setWebView(WebView* view)
 {
     m_view = view;

src/lib/navigation/siteicon.h

@@ -1,6 +1,6 @@
 /* ============================================================
 * Falkon - Qt web browser
-* Copyright (C) 2010-2014  David Rosca <nowrep@gmail.com>
+* Copyright (C) 2010-2018 David Rosca <nowrep@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -32,8 +32,9 @@ class FALKON_EXPORT SiteIcon : public ToolButton
     Q_OBJECT
 
 public:
-    explicit SiteIcon(BrowserWindow* window, LocationBar* parent);
+    explicit SiteIcon(LocationBar *parent);
 
+    void setBrowserWindow(BrowserWindow *window);
     void setWebView(WebView* view);
     void setIcon(const QIcon &icon);
 

src/lib/webtab/webtab.cpp

@@ -114,20 +114,16 @@ QDataStream &operator >>(QDataStream &stream, WebTab::SavedTab &tab)
     return stream;
 }
 
-WebTab::WebTab(BrowserWindow* window)
-    : QWidget()
-    , m_window(window)
-    , m_tabBar(0)
-    , m_isPinned(false)
+WebTab::WebTab(QWidget *parent)
+    : QWidget(parent)
 {
     setObjectName(QSL("webtab"));
 
     m_webView = new TabbedWebView(this);
-    m_webView->setBrowserWindow(m_window);
     m_webView->setPage(new WebPage);
     m_webView->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Expanding);
 
-    m_locationBar = new LocationBar(m_window);
+    m_locationBar = new LocationBar(this);
     m_locationBar->setWebView(m_webView);
 
     m_tabIcon = new TabIcon(this);
@@ -298,15 +294,15 @@ void WebTab::detach()
 
     // Remove the tab from tabbar
     m_window->tabWidget()->removeTab(tabIndex());
-    setParent(0);
+    setParent(nullptr);
     // Remove the locationbar from window
     m_locationBar->setParent(this);
     // Detach TabbedWebView
-    m_webView->setBrowserWindow(0);
+    m_webView->setBrowserWindow(nullptr);
 
     // WebTab is now standalone widget
-    m_window = 0;
-    m_tabBar = 0;
+    m_window = nullptr;
+    m_tabBar = nullptr;
 }
 
 void WebTab::attach(BrowserWindow* window)
@@ -315,6 +311,7 @@ void WebTab::attach(BrowserWindow* window)
     m_tabBar = m_window->tabWidget()->tabBar();
 
     m_webView->setBrowserWindow(m_window);
+    m_locationBar->setBrowserWindow(m_window);
     m_tabBar->setTabText(tabIndex(), title());
     m_tabBar->setTabButton(tabIndex(), m_tabBar->iconButtonPosition(), m_tabIcon);
     m_tabIcon->updateIcon();

src/lib/webtab/webtab.h

@@ -58,7 +58,7 @@ public:
         friend FALKON_EXPORT QDataStream &operator>>(QDataStream &stream, SavedTab &tab);
     };
 
-    explicit WebTab(BrowserWindow* window);
+    explicit WebTab(QWidget *parent = nullptr);
 
     TabbedWebView* webView() const;
     LocationBar* locationBar() const;
@@ -130,7 +130,6 @@ private:
     void titleWasChanged(const QString &title);
     void resizeEvent(QResizeEvent *event) override;
 
-    BrowserWindow* m_window;
     QVBoxLayout* m_layout;
     QSplitter* m_splitter;
 
@@ -138,14 +137,15 @@ private:
     WebInspector* m_inspector;
     LocationBar* m_locationBar;
     TabIcon* m_tabIcon;
-    TabBar* m_tabBar;
     QWidget *m_notificationWidget;
+    BrowserWindow* m_window = nullptr;
+    TabBar* m_tabBar = nullptr;
 
     WebTab *m_parentTab = nullptr;
     QVector<WebTab*> m_childTabs;
 
     SavedTab m_savedTab;
-    bool m_isPinned;
+    bool m_isPinned = false;
 };
 
 #endif // WEBTAB_H