Clang: Add tooltip action to copy to clipboard

...as selecting text in the tooltip was difficult and eventually got
disabled due to other problems - see
d58c0a9ac8.

This adds support for actions in TextMarks. They are displayed as
QToolButtons in a dedicated column in the tooltip.

Change-Id: I84ee3c3e4af573a80953786881d1333b00e4200c
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp

@@ -474,9 +474,17 @@ QString ClangDiagnosticWidget::createText(
     const ClangDiagnosticWidget::Destination &destination)
 {
     const QString htmlText = WidgetFromDiagnostics(toHints(destination)).htmlText(diagnostics);
+
     QTextDocument document;
     document.setHtml(htmlText);
-    return document.toPlainText();
+    QString text = document.toPlainText();
+
+    if (text.startsWith('\n'))
+        text = text.mid(1);
+    if (text.endsWith('\n'))
+        text.chop(1);
+
+    return text;
 }
 
 QWidget *ClangDiagnosticWidget::createWidget(

src/plugins/clangcodemodel/clangtextmark.cpp

@@ -33,7 +33,9 @@
 #include <utils/qtcassert.h>
 #include <utils/theme/theme.h>
 
+#include <QAction>
 #include <QApplication>
+#include <QClipboard>
 #include <QLayout>
 #include <QString>
 
@@ -64,7 +66,6 @@ static Core::Id categoryForSeverity(ClangBackEnd::DiagnosticSeverity severity)
 
 } // anonymous namespace
 
-
 ClangTextMark::ClangTextMark(const FileName &fileName,
                              const ClangBackEnd::DiagnosticContainer &diagnostic,
                              const RemovedFromEditorHandler &removedHandler,
@@ -86,6 +87,16 @@ ClangTextMark::ClangTextMark(const FileName &fileName,
         setColor(warning ? ::Utils::Theme::CodeModel_Warning_TextMarkColor
                          : ::Utils::Theme::CodeModel_Error_TextMarkColor);
     }
+
+    QAction *action = new QAction();
+    action->setIcon(QIcon::fromTheme("edit-copy", ::Utils::Icons::COPY.icon()));
+    QObject::connect(action, &QAction::triggered, [diagnostic]() {
+        using namespace ClangCodeModel::Internal;
+        const QString text = ClangDiagnosticWidget::createText({diagnostic},
+                                                               ClangDiagnosticWidget::InfoBar);
+        QApplication::clipboard()->setText(text, QClipboard::Clipboard);
+    });
+    setActions({action});
 }
 
 void ClangTextMark::updateIcon(bool valid)

src/plugins/texteditor/textmark.cpp

@@ -31,9 +31,12 @@
 #include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/documentmanager.h>
 #include <utils/qtcassert.h>
+#include <utils/tooltip/tooltip.h>
 
+#include <QAction>
 #include <QGridLayout>
 #include <QPainter>
+#include <QToolButton>
 
 using namespace Core;
 using namespace Utils;
@@ -88,6 +91,8 @@ TextMark::TextMark(const FileName &fileName, int lineNumber, Id category, double
 
 TextMark::~TextMark()
 {
+    qDeleteAll(m_actions);
+    m_actions.clear();
     if (!m_fileName.isEmpty())
         TextMarkRegistry::remove(this);
     if (m_baseTextDocument)
@@ -269,14 +274,34 @@ void TextMark::addToToolTipLayout(QGridLayout *target) const
 {
     auto contentLayout = new QVBoxLayout;
     addToolTipContent(contentLayout);
-    if (contentLayout->count() > 0) {
+    if (contentLayout->count() <= 0)
+        return;
+
+    // Left column: text mark icon
     const int row = target->rowCount();
     if (!m_icon.isNull()) {
         auto iconLabel = new QLabel;
         iconLabel->setPixmap(m_icon.pixmap(16, 16));
         target->addWidget(iconLabel, row, 0, Qt::AlignTop | Qt::AlignHCenter);
     }
+
+    // Middle column: tooltip content
     target->addLayout(contentLayout, row, 1);
+
+    // Right column: action icons/button
+    if (!m_actions.isEmpty()) {
+        auto actionsLayout = new QHBoxLayout;
+        for (QAction *action : m_actions) {
+            QTC_ASSERT(!action->icon().isNull(), continue);
+            auto button = new QToolButton;
+            button->setIcon(action->icon());
+            QObject::connect(button, &QToolButton::clicked, action, &QAction::triggered);
+            QObject::connect(button, &QToolButton::clicked, []() {
+                Utils::ToolTip::hideImmediately();
+            });
+            actionsLayout->addWidget(button, 0, Qt::AlignTop | Qt::AlignRight);
+        }
+        target->addLayout(actionsLayout, row, 2);
     }
 }
 
@@ -311,6 +336,16 @@ void TextMark::setColor(const Theme::Color &color)
     m_color = color;
 }
 
+QVector<QAction *> TextMark::actions() const
+{
+    return m_actions;
+}
+
+void TextMark::setActions(const QVector<QAction *> &actions)
+{
+    m_actions = actions;
+}
+
 TextMarkRegistry::TextMarkRegistry(QObject *parent)
     : QObject(parent)
 {

src/plugins/texteditor/textmark.h

@@ -32,8 +32,10 @@
 #include <utils/fileutils.h>
 
 #include <QIcon>
+#include <QVector>
 
 QT_BEGIN_NAMESPACE
+class QAction;
 class QGridLayout;
 class QLayout;
 class QPainter;
@@ -122,6 +124,9 @@ public:
     QString toolTip() const { return m_toolTip; }
     void setToolTip(const QString &toolTip) { m_toolTip = toolTip; }
 
+    QVector<QAction *> actions() const;
+    void setActions(const QVector<QAction *> &actions); // Takes ownership
+
 private:
     Q_DISABLE_COPY(TextMark)
 
@@ -138,6 +143,7 @@ private:
     QString m_lineAnnotation;
     QString m_toolTip;
     QString m_defaultToolTip;
+    QVector<QAction *> m_actions;
 };
 
 } // namespace TextEditor