Fix wrong context help if tool tip was not shown for focus widget

The tool tip never has focus, so it cannot become the IContext that is
checked for context help. So, integrate the help id into Utils::ToolTip
and check the tool tip first when checking for context help.
As a side effect the [F1] button and help id for the tool tip is now also
available for use outside of the text editors.

Task-number: QTCREATORBUG-5345
Change-Id: Id975703caf161d1183c247e8ad8bb693b90fd306
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

12 files changed, 82 insertions, 240 deletions

diff --git a/src/plugins/coreplugin/icore.cpp b/src/plugins/coreplugin/icore.cpp
index 6bb5ca9190..1efea803ec 100644
--- a/src/plugins/coreplugin/icore.cpp
+++ b/src/plugins/coreplugin/icore.cpp
@@ -528,19 +528,20 @@ void ICore::raiseWindow(QWidget *widget)
     }
 }
 
-void ICore::updateAdditionalContexts(const Context &remove, const Context &add)
+void ICore::updateAdditionalContexts(const Context &remove, const Context &add,
+                                     ContextPriority priority)
 {
-    m_mainwindow->updateAdditionalContexts(remove, add);
+    m_mainwindow->updateAdditionalContexts(remove, add, priority);
 }
 
-void ICore::addAdditionalContext(const Context &context)
+void ICore::addAdditionalContext(const Context &context, ContextPriority priority)
 {
-    m_mainwindow->updateAdditionalContexts(Context(), context);
+    m_mainwindow->updateAdditionalContexts(Context(), context, priority);
 }
 
 void ICore::removeAdditionalContext(const Context &context)
 {
-    m_mainwindow->updateAdditionalContexts(context, Context());
+    m_mainwindow->updateAdditionalContexts(context, Context(), ContextPriority::Low);
 }
 
 void ICore::addContextObject(IContext *context)
diff --git a/src/plugins/coreplugin/icore.h b/src/plugins/coreplugin/icore.h
index 783753ebb7..6f5e98ddd8 100644
--- a/src/plugins/coreplugin/icore.h
+++ b/src/plugins/coreplugin/icore.h
@@ -65,6 +65,11 @@ class CORE_EXPORT ICore : public QObject
     ~ICore();
 
 public:
+    enum class ContextPriority {
+        High,
+        Low
+    };
+
     // This should only be used to acccess the signals, so it could
     // theoretically return an QObject *. For source compatibility
     // it returns a ICore.
@@ -107,8 +112,10 @@ public:
     static IContext *currentContextObject();
     // Adds and removes additional active contexts, these contexts are appended
     // to the currently active contexts.
-    static void updateAdditionalContexts(const Context &remove, const Context &add);
-    static void addAdditionalContext(const Context &context);
+    static void updateAdditionalContexts(const Context &remove, const Context &add,
+                                         ContextPriority priority = ContextPriority::Low);
+    static void addAdditionalContext(const Context &context,
+                                     ContextPriority priority = ContextPriority::Low);
     static void removeAdditionalContext(const Context &context);
     static void addContextObject(IContext *context);
     static void removeContextObject(IContext *context);
diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index ddb32436e3..1c6ab39548 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -112,7 +112,7 @@ enum { debugMainWindow = 0 };
 MainWindow::MainWindow() :
     AppMainWindow(),
     m_coreImpl(new ICore(this)),
-    m_additionalContexts(Constants::C_GLOBAL),
+    m_lowPrioAdditionalContexts(Constants::C_GLOBAL),
     m_settingsDatabase(new SettingsDatabase(QFileInfo(PluginManager::settings()->fileName()).path(),
                                             QLatin1String("QtCreator"),
                                             this)),
@@ -985,23 +985,27 @@ void MainWindow::writeSettings()
     m_navigationWidget->saveSettings(settings);
 }
 
-void MainWindow::updateAdditionalContexts(const Context &remove, const Context &add)
+void MainWindow::updateAdditionalContexts(const Context &remove, const Context &add,
+                                          ICore::ContextPriority priority)
 {
     foreach (const Id id, remove) {
         if (!id.isValid())
             continue;
-
-        int index = m_additionalContexts.indexOf(id);
+        int index = m_lowPrioAdditionalContexts.indexOf(id);
+        if (index != -1)
+            m_lowPrioAdditionalContexts.removeAt(index);
+        index = m_highPrioAdditionalContexts.indexOf(id);
         if (index != -1)
-            m_additionalContexts.removeAt(index);
+            m_highPrioAdditionalContexts.removeAt(index);
     }
 
     foreach (const Id id, add) {
         if (!id.isValid())
             continue;
-
-        if (!m_additionalContexts.contains(id))
-            m_additionalContexts.prepend(id);
+        Context &cref = (priority == ICore::ContextPriority::High ? m_highPrioAdditionalContexts
+                                                                  : m_lowPrioAdditionalContexts);
+        if (!cref.contains(id))
+            cref.prepend(id);
     }
 
     updateContext();
@@ -1009,12 +1013,12 @@ void MainWindow::updateAdditionalContexts(const Context &remove, const Context &
 
 void MainWindow::updateContext()
 {
-    Context contexts;
+    Context contexts = m_highPrioAdditionalContexts;
 
     foreach (IContext *context, m_activeContext)
         contexts.add(context->context());
 
-    contexts.add(m_additionalContexts);
+    contexts.add(m_lowPrioAdditionalContexts);
 
     Context uniquecontexts;
     for (int i = 0; i < contexts.size(); ++i) {
diff --git a/src/plugins/coreplugin/mainwindow.h b/src/plugins/coreplugin/mainwindow.h
index b931f2652c..dff6096f81 100644
--- a/src/plugins/coreplugin/mainwindow.h
+++ b/src/plugins/coreplugin/mainwindow.h
@@ -103,7 +103,8 @@ public:
     IContext * currentContextObject() const;
     QStatusBar *statusBar() const;
 
-    void updateAdditionalContexts(const Context &remove, const Context &add);
+    void updateAdditionalContexts(const Context &remove, const Context &add,
+                                  ICore::ContextPriority priority);
 
     void setSuppressNavigationWidget(bool suppress);
 
@@ -151,7 +152,8 @@ private:
     void writeSettings();
 
     ICore *m_coreImpl;
-    Context m_additionalContexts;
+    Context m_highPrioAdditionalContexts;
+    Context m_lowPrioAdditionalContexts;
     SettingsDatabase *m_settingsDatabase;
     mutable QPrinter *m_printer;
     WindowSupport *m_windowSupport;
diff --git a/src/plugins/cppeditor/cpphoverhandler.cpp b/src/plugins/cppeditor/cpphoverhandler.cpp
index f5e5e5214d..94ed9efa9c 100644
--- a/src/plugins/cppeditor/cpphoverhandler.cpp
+++ b/src/plugins/cppeditor/cpphoverhandler.cpp
@@ -119,7 +119,6 @@ void CppHoverHandler::decorateToolTip()
                 prefix = QLatin1String("enum ");
             setToolTip(prefix + help.helpId());
         }
-        addF1ToToolTip();
     }
 }
 
diff --git a/src/plugins/help/helpplugin.cpp b/src/plugins/help/helpplugin.cpp
index b8a83150c2..c51d5aa721 100644
--- a/src/plugins/help/helpplugin.cpp
+++ b/src/plugins/help/helpplugin.cpp
@@ -78,6 +78,7 @@
 #include <utils/qtcassert.h>
 #include <utils/styledbar.h>
 #include <utils/theme/theme.h>
+#include <utils/tooltip/tooltip.h>
 
 #include <QDir>
 #include <QFileInfo>
@@ -101,6 +102,7 @@
 using namespace Help::Internal;
 
 static const char kExternalWindowStateKey[] = "Help/ExternalWindowState";
+static const char kToolTipHelpContext[] = "Help.ToolTip";
 
 using namespace Core;
 using namespace Utils;
@@ -169,6 +171,13 @@ bool HelpPlugin::initialize(const QStringList &arguments, QString *error)
     connect(HelpManager::instance(), SIGNAL(collectionFileChanged()), this,
         SLOT(setupHelpEngineIfNeeded()));
 
+    connect(ToolTip::instance(), &ToolTip::shown, ICore::instance(), []() {
+        ICore::addAdditionalContext(Context(kToolTipHelpContext), ICore::ContextPriority::High);
+    });
+    connect(ToolTip::instance(), &ToolTip::hidden,ICore::instance(), []() {
+        ICore::removeAdditionalContext(Context(kToolTipHelpContext));
+    });
+
     Command *cmd;
     QAction *action;
 
@@ -185,7 +194,8 @@ bool HelpPlugin::initialize(const QStringList &arguments, QString *error)
     connect(action, SIGNAL(triggered()), this, SLOT(activateIndex()));
 
     action = new QAction(tr("Context Help"), this);
-    cmd = ActionManager::registerAction(action, Help::Constants::CONTEXT_HELP);
+    cmd = ActionManager::registerAction(action, Help::Constants::CONTEXT_HELP,
+                                        Context(kToolTipHelpContext, Core::Constants::C_GLOBAL));
     ActionManager::actionContainer(Core::Constants::M_HELP)->addAction(cmd, Core::Constants::G_HELP_HELP);
     cmd->setDefaultKeySequence(QKeySequence(Qt::Key_F1));
     connect(action, SIGNAL(triggered()), this, SLOT(showContextHelp()));
@@ -560,40 +570,43 @@ static QUrl findBestLink(const QMap<QString, QUrl> &links, QString *highlightId)
 void HelpPlugin::showContextHelp()
 {
     // Find out what to show
-    QMap<QString, QUrl> links;
-    QString idFromContext;
-    if (IContext *context = ICore::currentContextObject()) {
-        idFromContext = context->contextHelpId();
-        links = HelpManager::linksForIdentifier(idFromContext);
-        // Maybe the id is already an URL
-        if (links.isEmpty() && LocalHelpManager::isValidUrl(idFromContext))
-            links.insert(idFromContext, idFromContext);
-    }
+    QString contextHelpId = Utils::ToolTip::contextHelpId();
+    IContext *context = ICore::currentContextObject();
+    if (contextHelpId.isEmpty() && context)
+        contextHelpId = context->contextHelpId();
+
+    // get the viewer after getting the help id,
+    // because a new window might be opened and therefore focus be moved
+    HelpViewer *viewer = viewerForContextHelp();
+    QTC_ASSERT(viewer, return);
 
-    if (HelpViewer *viewer = viewerForContextHelp()) {
-        QUrl source = findBestLink(links, &m_contextHelpHighlightId);
-        if (!source.isValid()) {
-            // No link found or no context object
-            viewer->setSource(QUrl(Help::Constants::AboutBlank));
-            viewer->setHtml(tr("<html><head><title>No Documentation</title>"
-                "</head><body><br/><center>"
-                "<font color=\"%1\"><b>%2</b></font><br/>"
-                "<font color=\"%3\">No documentation available.</font>"
-                "</center></body></html>")
-                .arg(creatorTheme()->color(Theme::TextColorNormal).name())
-                .arg(idFromContext)
-                .arg(creatorTheme()->color(Theme::TextColorNormal).name()));
+    QMap<QString, QUrl> links = HelpManager::linksForIdentifier(contextHelpId);
+    // Maybe the id is already an URL
+    if (links.isEmpty() && LocalHelpManager::isValidUrl(contextHelpId))
+        links.insert(contextHelpId, contextHelpId);
+
+    QUrl source = findBestLink(links, &m_contextHelpHighlightId);
+    if (!source.isValid()) {
+        // No link found or no context object
+        viewer->setSource(QUrl(Help::Constants::AboutBlank));
+        viewer->setHtml(tr("<html><head><title>No Documentation</title>"
+            "</head><body><br/><center>"
+            "<font color=\"%1\"><b>%2</b></font><br/>"
+            "<font color=\"%3\">No documentation available.</font>"
+            "</center></body></html>")
+            .arg(creatorTheme()->color(Theme::TextColorNormal).name())
+            .arg(contextHelpId)
+            .arg(creatorTheme()->color(Theme::TextColorNormal).name()));
+    } else {
+        const QUrl &oldSource = viewer->source();
+        if (source != oldSource) {
+            viewer->stop();
+            viewer->setSource(source); // triggers loadFinished which triggers id highlighting
         } else {
-            const QUrl &oldSource = viewer->source();
-            if (source != oldSource) {
-                viewer->stop();
-                viewer->setSource(source); // triggers loadFinished which triggers id highlighting
-            } else {
-                viewer->scrollToAnchor(source.fragment());
-            }
-            viewer->setFocus();
-            ICore::raiseWindow(viewer);
+            viewer->scrollToAnchor(source.fragment());
         }
+        viewer->setFocus();
+        ICore::raiseWindow(viewer);
     }
 }
 
diff --git a/src/plugins/texteditor/basehoverhandler.cpp b/src/plugins/texteditor/basehoverhandler.cpp
index 08e1bbcdb3..b76250a422 100644
--- a/src/plugins/texteditor/basehoverhandler.cpp
+++ b/src/plugins/texteditor/basehoverhandler.cpp
@@ -82,13 +82,6 @@ void BaseHoverHandler::appendToolTip(const QString &extension)
     m_toolTip.append(extension);
 }
 
-void BaseHoverHandler::addF1ToToolTip()
-{
-    m_toolTip = QString::fromLatin1("<table><tr><td valign=middle>%1</td><td>&nbsp;&nbsp;"
-                                    "<img src=\":/texteditor/images/f1.png\"></td>"
-                                    "</tr></table>").arg(m_toolTip);
-}
-
 void BaseHoverHandler::setIsDiagnosticTooltip(bool isDiagnosticTooltip)
 {
     m_diagnosticTooltip = isDiagnosticTooltip;
@@ -133,7 +126,6 @@ void BaseHoverHandler::decorateToolTip()
         if (!contents.isEmpty()) {
             setToolTip(toolTip().toHtmlEscaped());
             appendToolTip(contents);
-            addF1ToToolTip();
         }
     }
 }
@@ -143,7 +135,9 @@ void BaseHoverHandler::operateTooltip(TextEditorWidget *editorWidget, const QPoi
     if (m_toolTip.isEmpty())
         Utils::ToolTip::hide();
     else
-        Utils::ToolTip::show(point, m_toolTip, editorWidget);
+        Utils::ToolTip::show(point, m_toolTip, editorWidget, m_lastHelpItemIdentified.isValid()
+                             ? m_lastHelpItemIdentified.helpId()
+                             : QString());
 }
 
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/basehoverhandler.h b/src/plugins/texteditor/basehoverhandler.h
index 00accf05b7..eff2b75a06 100644
--- a/src/plugins/texteditor/basehoverhandler.h
+++ b/src/plugins/texteditor/basehoverhandler.h
@@ -59,8 +59,6 @@ protected:
     void appendToolTip(const QString &extension);
     const QString &toolTip() const;
 
-    void addF1ToToolTip();
-
     void setIsDiagnosticTooltip(bool isDiagnosticTooltip);
     bool isDiagnosticTooltip() const;
 
diff --git a/src/plugins/texteditor/images/f1.png b/src/plugins/texteditor/images/f1.png
deleted file mode 100644
index 6332719c07..0000000000
--- a/src/plugins/texteditor/images/f1.png
+++ /dev/null
diff --git a/src/plugins/texteditor/images/f1.svg b/src/plugins/texteditor/images/f1.svg
deleted file mode 100644
index 468594cb77..0000000000
--- a/src/plugins/texteditor/images/f1.svg
+++ /dev/null
@@ -1,175 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:xlink="http://www.w3.org/1999/xlink"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   width="24"
-   height="24"
-   id="svg2411"
-   sodipodi:version="0.32"
-   inkscape:version="0.46"
-   version="1.0"
-   sodipodi:docname="f1.svg"
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diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index 582b52fdcb..ea968f8e6a 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -3127,7 +3127,7 @@ bool TextEditorWidget::viewportEvent(QEvent *event)
         RefactorMarker refactorMarker = d->m_refactorOverlay->markerAt(pos);
         if (refactorMarker.isValid() && !refactorMarker.tooltip.isEmpty()) {
             ToolTip::show(he->globalPos(), refactorMarker.tooltip,
-                          viewport(), refactorMarker.rect);
+                          viewport(), QString(), refactorMarker.rect);
             return true;
         }
 
diff --git a/src/plugins/texteditor/texteditor.qrc b/src/plugins/texteditor/texteditor.qrc
index c58205cd2c..7f829e9159 100644
--- a/src/plugins/texteditor/texteditor.qrc
+++ b/src/plugins/texteditor/texteditor.qrc
@@ -4,6 +4,5 @@
         <file>images/finddirectory.png</file>
         <file>images/refactormarker.png</file>
         <file>images/snippet.png</file>
-        <file>images/f1.png</file>
     </qresource>
 </RCC>