Add an option to show tabs from last time when Dolphin starts

Summary:
All modern web browsers offer a function to show tabs from last time when a browser starts, and many apps today
restore their prior state when they're launched. This patch implements thatfunctionality as an option and turns it on by default.

The settings window is accordingly adjusted to be clear about what applies when:

{F7681752}

FEATURE: 413564
FIXED-IN: 20.08.0

Depends on D25106
Depends on D25219

Test Plan:
With the new setting turned off:
- No behavioral changes at all

With the new setting turned on:
- When launched from the GUI or CLI without any URLs, dolphin restores session
- When rebooting with Dolphin open, it restores session normally after the system comes back (i.e. no behavioral change here)
- When launched with URLs, Dolphin window is opened showing those URLs instead of restoring session
- When Dolphin is already running and a new window is opened, that new window shows a single tab with the same URL as was visible in the previously-open Dolphin instance (i.e. no behavioral change here)
- "Open Containing folder" functionality in other apps works regardless of whether or not Dolphin is running

Reviewers: #dolphin, #vdg, feverfew, meven, elvisangelaccio, ndavis

Reviewed By: #dolphin, #vdg, feverfew, elvisangelaccio, ndavis

Subscribers: davidedmundson, ndavis, intika, feverfew, kfm-devel, ngraham, broulik, #dolphin

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D11382

3 files changed, 79 insertions, 23 deletions

diff --git a/src/settings/dolphin_generalsettings.kcfg b/src/settings/dolphin_generalsettings.kcfg
index fca70656d..c397b2945 100644
--- a/src/settings/dolphin_generalsettings.kcfg
+++ b/src/settings/dolphin_generalsettings.kcfg
@@ -42,6 +42,10 @@
             <label>Home URL</label>
             <default code="true">QUrl::fromLocalFile(QDir::homePath()).toDisplayString(QUrl::PreferLocalFile)</default>
         </entry>
+        <entry name="RememberOpenedTabs" type="Bool">
+            <label>Remember open folders and tabs</label>
+            <default>true</default>
+        </entry>
         <entry name="SplitView" type="Bool">
             <label>Split the view into two panes</label>
             <default>false</default>
diff --git a/src/settings/startup/startupsettingspage.cpp b/src/settings/startup/startupsettingspage.cpp
index d7d5fba4c..eb1495746 100644
--- a/src/settings/startup/startupsettingspage.cpp
+++ b/src/settings/startup/startupsettingspage.cpp
@@ -27,18 +27,24 @@
 #include <KLocalizedString>
 #include <KMessageBox>
 
+#include <QButtonGroup>
 #include <QCheckBox>
 #include <QFileDialog>
 #include <QLineEdit>
 #include <QPushButton>
+#include <QRadioButton>
 #include <QFormLayout>
+#include <QGridLayout>
 #include <QHBoxLayout>
-#include <QVBoxLayout>
 
 StartupSettingsPage::StartupSettingsPage(const QUrl& url, QWidget* parent) :
     SettingsPageBase(parent),
     m_url(url),
     m_homeUrl(nullptr),
+    m_homeUrlBoxLayoutContainer(nullptr),
+    m_buttonBoxLayoutContainer(nullptr),
+    m_rememberOpenedTabsRadioButton(nullptr),
+    m_homeUrlRadioButton(nullptr),
     m_splitView(nullptr),
     m_editableUrl(nullptr),
     m_showFullPath(nullptr),
@@ -48,9 +54,19 @@ StartupSettingsPage::StartupSettingsPage(const QUrl& url, QWidget* parent) :
 {
     QFormLayout* topLayout = new QFormLayout(this);
 
+    m_rememberOpenedTabsRadioButton = new QRadioButton(i18nc("@option:radio Startup Settings", "Folders, tabs, and window state from last time"));
+    m_homeUrlRadioButton = new QRadioButton();
+    // HACK: otherwise the radio button has too much spacing in a grid layout
+    m_homeUrlRadioButton->setMaximumWidth(24);
+
+    QButtonGroup* initialViewGroup = new QButtonGroup(this);
+    initialViewGroup->addButton(m_rememberOpenedTabsRadioButton);
+    initialViewGroup->addButton(m_homeUrlRadioButton);
+
 
     // create 'Home URL' editor
-    QHBoxLayout* homeUrlBoxLayout = new QHBoxLayout();
+    m_homeUrlBoxLayoutContainer = new QWidget(this);
+    QHBoxLayout* homeUrlBoxLayout = new QHBoxLayout(m_homeUrlBoxLayoutContainer);
     homeUrlBoxLayout->setContentsMargins(0, 0, 0, 0);
 
     m_homeUrl = new QLineEdit();
@@ -67,7 +83,8 @@ StartupSettingsPage::StartupSettingsPage(const QUrl& url, QWidget* parent) :
     connect(selectHomeUrlButton, &QPushButton::clicked,
             this, &StartupSettingsPage::selectHomeUrl);
 
-    QHBoxLayout* buttonBoxLayout = new QHBoxLayout();
+    m_buttonBoxLayoutContainer = new QWidget(this);
+    QHBoxLayout* buttonBoxLayout = new QHBoxLayout(m_buttonBoxLayoutContainer);
     buttonBoxLayout->setContentsMargins(0, 0, 0, 0);
 
     QPushButton* useCurrentButton = new QPushButton(i18nc("@action:button", "Use Current Location"));
@@ -79,41 +96,50 @@ StartupSettingsPage::StartupSettingsPage(const QUrl& url, QWidget* parent) :
     connect(useDefaultButton, &QPushButton::clicked,
             this, &StartupSettingsPage::useDefaultLocation);
 
-    QVBoxLayout* homeBoxLayout = new QVBoxLayout();
-    homeBoxLayout->setContentsMargins(0, 0, 0, 0);
-    homeBoxLayout->addLayout(homeUrlBoxLayout);
-    homeBoxLayout->addLayout(buttonBoxLayout);
+    QGridLayout* startInLocationLayout = new QGridLayout();
+    startInLocationLayout->setHorizontalSpacing(0);
+    startInLocationLayout->setContentsMargins(0, 0, 0, 0);
+    startInLocationLayout->addWidget(m_homeUrlRadioButton, 0, 0);
+    startInLocationLayout->addWidget(m_homeUrlBoxLayoutContainer, 0, 1);
+    startInLocationLayout->addWidget(m_buttonBoxLayoutContainer, 1, 1);
 
-    topLayout->addRow(i18nc("@label:textbox", "Start in:"), homeBoxLayout);
+    topLayout->addRow(i18nc("@label:textbox", "Show on startup:"), m_rememberOpenedTabsRadioButton);
+    topLayout->addRow(QString(), startInLocationLayout);
 
 
     topLayout->addItem(new QSpacerItem(0, Dolphin::VERTICAL_SPACER_HEIGHT, QSizePolicy::Fixed, QSizePolicy::Fixed));
 
-
-    // create 'Split view', 'Show full path', 'Editable location' and 'Filter bar' checkboxes
-    m_splitView = new QCheckBox(i18nc("@option:check Startup Settings", "Split view mode"));
-    topLayout->addRow(i18nc("@label:checkbox", "Window options:"), m_splitView);
-    m_editableUrl = new QCheckBox(i18nc("@option:check Startup Settings", "Editable location bar"));
+    m_splitView = new QCheckBox(i18nc("@option:check Startup Settings", "Begin in split view mode"));
+    topLayout->addRow(i18n("New windows:"), m_splitView);
+    m_filterBar = new QCheckBox(i18nc("@option:check Startup Settings", "Show filter bar"));
+    topLayout->addRow(QString(), m_filterBar);
+    m_editableUrl = new QCheckBox(i18nc("@option:check Startup Settings", "Make location bar editable"));
     topLayout->addRow(QString(), m_editableUrl);
+
+    topLayout->addItem(new QSpacerItem(0, Dolphin::VERTICAL_SPACER_HEIGHT, QSizePolicy::Fixed, QSizePolicy::Fixed));
+
+    m_openExternallyCalledFolderInNewTab = new QCheckBox(i18nc("@option:check Startup Settings", "Open new folders in tabs"));
+    topLayout->addRow(i18nc("@label:checkbox", "General:"), m_openExternallyCalledFolderInNewTab);
     m_showFullPath = new QCheckBox(i18nc("@option:check Startup Settings", "Show full path inside location bar"));
     topLayout->addRow(QString(), m_showFullPath);
-    m_filterBar = new QCheckBox(i18nc("@option:check Startup Settings", "Show filter bar"));
-    topLayout->addRow(QString(), m_filterBar);
     m_showFullPathInTitlebar = new QCheckBox(i18nc("@option:check Startup Settings", "Show full path in title bar"));
     topLayout->addRow(QString(), m_showFullPathInTitlebar);
-    m_openExternallyCalledFolderInNewTab = new QCheckBox(i18nc("@option:check Startup Settings", "Open new folders in tabs"));
-    topLayout->addRow(QString(), m_openExternallyCalledFolderInNewTab);
-
 
     loadSettings();
 
+    updateInitialViewOptions();
+
     connect(m_homeUrl, &QLineEdit::textChanged, this, &StartupSettingsPage::slotSettingsChanged);
+    connect(m_rememberOpenedTabsRadioButton, &QRadioButton::toggled, this, &StartupSettingsPage::slotSettingsChanged);
+    connect(m_homeUrlRadioButton, &QRadioButton::toggled, this, &StartupSettingsPage::slotSettingsChanged);
+
     connect(m_splitView,    &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
     connect(m_editableUrl,  &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
-    connect(m_showFullPath, &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
     connect(m_filterBar,    &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
-    connect(m_showFullPathInTitlebar, &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
+
     connect(m_openExternallyCalledFolderInNewTab, &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
+    connect(m_showFullPath, &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
+    connect(m_showFullPathInTitlebar, &QCheckBox::toggled, this, &StartupSettingsPage::slotSettingsChanged);
 }
 
 StartupSettingsPage::~StartupSettingsPage()
@@ -132,12 +158,21 @@ void StartupSettingsPage::applySettings()
         KMessageBox::error(this, i18nc("@info", "The location for the home folder is invalid or does not exist, it will not be applied."));
     }
 
+    // Remove saved state if "remember open tabs" has been turned off
+    if (!m_rememberOpenedTabsRadioButton->isChecked()) {
+        KConfigGroup windowState{KSharedConfig::openConfig(QStringLiteral("dolphinrc")), "WindowState"};
+        if (windowState.exists()) {
+            windowState.deleteGroup();
+        }
+    }
+
+    settings->setRememberOpenedTabs(m_rememberOpenedTabsRadioButton->isChecked());
     settings->setSplitView(m_splitView->isChecked());
     settings->setEditableUrl(m_editableUrl->isChecked());
-    settings->setShowFullPath(m_showFullPath->isChecked());
     settings->setFilterBar(m_filterBar->isChecked());
-    settings->setShowFullPathInTitlebar(m_showFullPathInTitlebar->isChecked());
     settings->setOpenExternallyCalledFolderInNewTab(m_openExternallyCalledFolderInNewTab->isChecked());
+    settings->setShowFullPath(m_showFullPath->isChecked());
+    settings->setShowFullPathInTitlebar(m_showFullPathInTitlebar->isChecked());
     settings->save();
 }
 
@@ -155,9 +190,18 @@ void StartupSettingsPage::slotSettingsChanged()
     // to apply the startup settings only if they have been explicitly changed by the user
     // (see bug #254947).
     GeneralSettings::setModifiedStartupSettings(true);
+
+    // Enable and disable home URL controls appropriately
+    updateInitialViewOptions();
     emit changed();
 }
 
+void StartupSettingsPage::updateInitialViewOptions()
+{
+    m_homeUrlBoxLayoutContainer->setEnabled(m_homeUrlRadioButton->isChecked());
+    m_buttonBoxLayoutContainer->setEnabled(m_homeUrlRadioButton->isChecked());
+}
+
 void StartupSettingsPage::selectHomeUrl()
 {
     const QUrl homeUrl(QUrl::fromUserInput(m_homeUrl->text(), QString(), QUrl::AssumeLocalFile));
@@ -182,6 +226,8 @@ void StartupSettingsPage::loadSettings()
 {
     const QUrl url(Dolphin::homeUrl());
     m_homeUrl->setText(url.toDisplayString(QUrl::PreferLocalFile));
+    m_rememberOpenedTabsRadioButton->setChecked(GeneralSettings::rememberOpenedTabs());
+    m_homeUrlRadioButton->setChecked(!GeneralSettings::rememberOpenedTabs());
     m_splitView->setChecked(GeneralSettings::splitView());
     m_editableUrl->setChecked(GeneralSettings::editableUrl());
     m_showFullPath->setChecked(GeneralSettings::showFullPath());
diff --git a/src/settings/startup/startupsettingspage.h b/src/settings/startup/startupsettingspage.h
index a5e0b236f..d1c937f1f 100644
--- a/src/settings/startup/startupsettingspage.h
+++ b/src/settings/startup/startupsettingspage.h
@@ -23,8 +23,9 @@
 
 #include <QUrl>
 
-class QLineEdit;
 class QCheckBox;
+class QLineEdit;
+class QRadioButton;
 
 /**
  * @brief Page for the 'Startup' settings of the Dolphin settings dialog.
@@ -48,6 +49,7 @@ public:
 
 private slots:
     void slotSettingsChanged();
+    void updateInitialViewOptions();
     void selectHomeUrl();
     void useCurrentLocation();
     void useDefaultLocation();
@@ -58,6 +60,10 @@ private:
 private:
     QUrl m_url;
     QLineEdit* m_homeUrl;
+    QWidget* m_homeUrlBoxLayoutContainer;
+    QWidget* m_buttonBoxLayoutContainer;
+    QRadioButton* m_rememberOpenedTabsRadioButton;
+    QRadioButton* m_homeUrlRadioButton;
 
     QCheckBox* m_splitView;
     QCheckBox* m_editableUrl;