ProjectExplorer: Set temporary flag on scratch buffer document

Task-number: QTCREATORBUG-23509
Change-Id: Ieb3922030cb1dd4984b91ac24d0396bb19a4a711
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

share/qtcreator/templates/wizards/files/scratch/wizard.json

@@ -21,7 +21,8 @@
                 "source": "file.txt",
                 "target": "%{TargetPath}",
                 "overwrite": true,
-                "openInEditor": true
+                "openInEditor": true,
+                "temporary": true
             }
         }
     ]

src/plugins/coreplugin/generatedfile.h

@@ -36,18 +36,20 @@ class GeneratedFilePrivate;
 class CORE_EXPORT GeneratedFile
 {
 public:
-    enum Attribute { // Open this file in editor
-                     OpenEditorAttribute = 0x01,
-                     // Open project
-                     OpenProjectAttribute = 0x02,
-                     /* File is generated by external scripts, do not write out,
-                      * see BaseFileWizard::writeFiles() */
-                     CustomGeneratorAttribute = 0x4,
-                     /* File exists and the user indicated that he wants to keep it */
-                     KeepExistingFileAttribute = 0x8,
-                     /* Force overwriting of a file without asking the user to keep it */
-                     ForceOverwrite = 0x10
-                   };
+    enum Attribute {
+        // Open this file in editor
+        OpenEditorAttribute = 0x01,
+        // Open project
+        OpenProjectAttribute = 0x02,
+        // File is generated by external scripts, do not write out, see BaseFileWizard::writeFiles()
+        CustomGeneratorAttribute = 0x4,
+        // File exists and the user indicated that he wants to keep it
+        KeepExistingFileAttribute = 0x8,
+        // Force overwriting of a file without asking the user to keep it
+        ForceOverwrite = 0x10,
+        // Mark the document temporary after opening the file
+        TemporaryFile = 0x20
+    };
     Q_DECLARE_FLAGS(Attributes, Attribute)
 
     GeneratedFile();

src/plugins/projectexplorer/jsonwizard/jsonwizard.cpp

@@ -33,6 +33,7 @@
 #include "../projectexplorerconstants.h"
 #include "../projecttree.h"
 #include <coreplugin/editormanager/editormanager.h>
+#include <coreplugin/editormanager/ieditor.h>
 #include <coreplugin/messagemanager.h>
 
 #include <utils/algorithm.h>
@@ -465,11 +466,14 @@ void JsonWizard::openFiles(const JsonWizard::GeneratorFiles &files)
             openedSomething = true;
         }
         if (file.attributes() & Core::GeneratedFile::OpenEditorAttribute) {
-            if (!Core::EditorManager::openEditor(file.path(), file.editorId())) {
+            Core::IEditor *editor = Core::EditorManager::openEditor(file.path(), file.editorId());
+            if (!editor) {
                 errorMessage = QCoreApplication::translate("ProjectExplorer::JsonWizard",
                                                            "Failed to open an editor for \"%1\".")
                         .arg(QDir::toNativeSeparators(file.path()));
                 break;
+            } else if (file.attributes() & Core::GeneratedFile::TemporaryFile) {
+                editor->document()->setTemporary(true);
             }
             openedSomething = true;
         }

src/plugins/projectexplorer/jsonwizard/jsonwizardfilegenerator.cpp

@@ -69,6 +69,7 @@ bool JsonWizardFileGenerator::setup(const QVariant &data, QString *errorMessage)
         f.isBinary = tmp.value(QLatin1String("isBinary"), false);
         f.overwrite = tmp.value(QLatin1String("overwrite"), false);
         f.openInEditor = tmp.value(QLatin1String("openInEditor"), false);
+        f.isTemporary = tmp.value(QLatin1String("temporary"), false);
         f.openAsProject = tmp.value(QLatin1String("openAsProject"), false);
 
         f.options = JsonWizard::parseOptions(tmp.value(QLatin1String("options")), errorMessage);
@@ -148,6 +149,8 @@ Core::GeneratedFile JsonWizardFileGenerator::generateFile(const File &file,
         attributes |= Core::GeneratedFile::OpenProjectAttribute;
     if (JsonWizard::boolFromVariant(file.overwrite, expander))
         attributes |= Core::GeneratedFile::ForceOverwrite;
+    if (JsonWizard::boolFromVariant(file.isTemporary, expander))
+        attributes |= Core::GeneratedFile::TemporaryFile;
 
     if (file.keepExisting)
         attributes |= Core::GeneratedFile::KeepExistingFileAttribute;

src/plugins/projectexplorer/jsonwizard/jsonwizardfilegenerator.h

@@ -55,6 +55,7 @@ private:
         QVariant overwrite = false;
         QVariant openInEditor = false;
         QVariant openAsProject = false;
+        QVariant isTemporary = false;
 
         QList<JsonWizard::OptionDefinition> options;
     };