QmlDesigner: Indicate if a file is modified

Task-number: QDS-12361
Change-Id: I7a6c5f112b0f193f5bb975a331e2f0d44d19ddc2
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>

share/qtcreator/qmldesigner/toolbar/Main.qml

@@ -190,6 +190,26 @@ Rectangle {
             onActivated: backend.openFileByIndex(index)
         }
 
+        Text {
+            parent:currentFile.contentItem
+            visible: backend.isDocumentDirty
+
+            anchors.right: parent.right
+            anchors.rightMargin: parent.width - metric.textWidth - 18
+            color: StudioTheme.Values.themeTextColor
+            text: StudioTheme.Constants.wildcard
+            font.family: StudioTheme.Constants.iconFont.family
+            font.pixelSize: StudioTheme.Values.smallIconFont
+            anchors.verticalCenter: parent.verticalCenter
+            anchors.verticalCenterOffset: -4
+
+            FontMetrics {
+                id: metric
+                font: currentFile.font
+                property int textWidth: metric.boundingRect(currentFile.currentText).width
+            }
+        }
+
         ToolbarButton {
             id: backButton
             anchors.verticalCenter: parent.verticalCenter

src/plugins/qmldesigner/components/toolbar/toolbarbackend.cpp

@@ -21,6 +21,9 @@
 #include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/icore.h>
 #include <coreplugin/modemanager.h>
+
+#include <texteditor/textdocument.h>
+
 #include <projectexplorer/kitmanager.h>
 #include <projectexplorer/project.h>
 #include <projectexplorer/projectexplorer.h>
@@ -302,6 +305,20 @@ ToolBarBackend::ToolBarBackend(QObject *parent)
             this,
             &ToolBarBackend::documentIndexChanged);
 
+    connect(Core::EditorManager::instance(), &Core::EditorManager::currentEditorChanged, this, [this]() {
+        static QMetaObject::Connection *lastConnection = nullptr;
+        delete lastConnection;
+
+        if (auto textDocument = qobject_cast<TextEditor::TextDocument *>(
+                Core::EditorManager::currentDocument())) {
+            connect(textDocument->document(),
+                    &QTextDocument::modificationChanged,
+                    this,
+                    &ToolBarBackend::isDocumentDirtyChanged);
+            emit isDocumentDirtyChanged();
+        }
+    });
+
     connect(Core::EditorManager::instance(),
             &Core::EditorManager::currentEditorChanged,
             this,
@@ -740,6 +757,12 @@ bool ToolBarBackend::isSharingEnabled()
     return QmlDesigner::checkEnterpriseLicense();
 }
 
+bool ToolBarBackend::isDocumentDirty() const
+{
+    return Core::EditorManager::currentDocument()
+           && Core::EditorManager::currentDocument()->isModified();
+}
+
 void ToolBarBackend::launchGlobalAnnotations()
 {
     QmlDesignerPlugin::emitUsageStatistics(Constants::EVENT_TOOLBAR_EDIT_GLOBAL_ANNOTATION);

src/plugins/qmldesigner/components/toolbar/toolbarbackend.h

@@ -97,6 +97,7 @@ class ToolBarBackend : public QObject
     Q_PROPERTY(bool isMCUs READ isMCUs NOTIFY isMCUsChanged)
     Q_PROPERTY(bool projectOpened READ projectOpened NOTIFY projectOpenedChanged)
     Q_PROPERTY(bool isSharingEnabled READ isSharingEnabled NOTIFY isSharingEnabledChanged)
+    Q_PROPERTY(bool isDocumentDirty READ isDocumentDirty NOTIFY isDocumentDirtyChanged)
 
 public:
     ToolBarBackend(QObject *parent  = nullptr);
@@ -147,6 +148,8 @@ public:
 
     bool isSharingEnabled();
 
+    bool isDocumentDirty() const;
+
     static void launchGlobalAnnotations();
 
 signals:
@@ -167,6 +170,7 @@ signals:
     void isMCUsChanged();
     void projectOpenedChanged();
     void isSharingEnabledChanged();
+    void isDocumentDirtyChanged();
 
 private:
     void setupWorkspaces();