Make BaseFileWizard async

The side-effect is that WizardEventLoop can go!

Change-Id: I0eae0e0fa91a48e2a5010b47cc0de86758969904
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/coreplugin/basefilewizard.cpp

@@ -30,6 +30,136 @@
 
 #include "basefilewizard.h"
 
-Core::BaseFileWizard::BaseFileWizard(QWidget *parent) :
-    Utils::Wizard(parent)
-{ }
+#include "basefilewizardfactory.h"
+#include "ifilewizardextension.h"
+
+#include <extensionsystem/pluginmanager.h>
+
+#include <QMessageBox>
+
+using namespace Utils;
+
+namespace Core {
+
+BaseFileWizard::BaseFileWizard(const BaseFileWizardFactory *factory,
+                               const QVariantMap &extraValues,
+                               QWidget *parent) :
+    Wizard(parent),
+    m_extraValues(extraValues),
+    m_factory(factory)
+{
+    // Compile extension pages, purge out unused ones
+    QList<IFileWizardExtension *> extensionList
+            = ExtensionSystem::PluginManager::getObjects<IFileWizardExtension>();
+
+    for (auto it = extensionList.begin(); it != extensionList.end(); ) {
+        const QList<QWizardPage *> extensionPages = (*it)->extensionPages(factory);
+        if (extensionPages.empty()) {
+            it = extensionList.erase(it);
+        } else {
+            m_extensionPages += extensionPages;
+            ++it;
+        }
+    }
+
+    if (!m_extensionPages.empty())
+        m_firstExtensionPage = m_extensionPages.front();
+}
+
+void BaseFileWizard::initializePage(int id)
+{
+    if (page(id) == m_firstExtensionPage) {
+        generateFileList();
+
+        QList<IFileWizardExtension *> extensionList
+                = ExtensionSystem::PluginManager::getObjects<IFileWizardExtension>();
+        foreach (IFileWizardExtension *ex, extensionList)
+            ex->firstExtensionPageShown(m_files, m_extraValues);
+    }
+}
+
+QList<QWizardPage *> BaseFileWizard::extensionPages()
+{
+    return m_extensionPages;
+}
+
+void BaseFileWizard::accept()
+{
+    if (m_files.isEmpty())
+        generateFileList();
+
+    QString errorMessage;
+
+    // Compile result list and prompt for overwrite
+    switch (m_factory->promptOverwrite(&m_files, &errorMessage)) {
+    case BaseFileWizardFactory::OverwriteCanceled:
+        reject();
+        return;
+    case BaseFileWizardFactory::OverwriteError:
+        QMessageBox::critical(0, tr("Existing files"), errorMessage);
+        reject();
+        return;
+    case BaseFileWizardFactory::OverwriteOk:
+        break;
+    }
+
+    QList<IFileWizardExtension *> extensionList
+            = ExtensionSystem::PluginManager::getObjects<IFileWizardExtension>();
+    foreach (IFileWizardExtension *ex, extensionList) {
+        for (int i = 0; i < m_files.count(); i++) {
+            ex->applyCodeStyle(&m_files[i]);
+        }
+    }
+
+    // Write
+    if (!m_factory->writeFiles(m_files, &errorMessage)) {
+        QMessageBox::critical(parentWidget(), tr("File Generation Failure"), errorMessage);
+        reject();
+        return;
+    }
+
+    bool removeOpenProjectAttribute = false;
+    // Run the extensions
+    foreach (IFileWizardExtension *ex, extensionList) {
+        bool remove;
+        if (!ex->processFiles(m_files, &remove, &errorMessage)) {
+            if (!errorMessage.isEmpty())
+                QMessageBox::critical(parentWidget(), tr("File Generation Failure"), errorMessage);
+            reject();
+            return;
+        }
+        removeOpenProjectAttribute |= remove;
+    }
+
+    if (removeOpenProjectAttribute) {
+        for (int i = 0; i < m_files.count(); i++) {
+            if (m_files[i].attributes() & GeneratedFile::OpenProjectAttribute)
+                m_files[i].setAttributes(GeneratedFile::OpenEditorAttribute);
+        }
+    }
+
+    // Post generation handler
+    if (!m_factory->postGenerateFiles(this, m_files, &errorMessage))
+        if (!errorMessage.isEmpty())
+            QMessageBox::critical(0, tr("File Generation Failure"), errorMessage);
+
+    Wizard::accept();
+}
+
+void BaseFileWizard::reject()
+{
+    m_files.clear();
+    Wizard::reject();
+}
+
+void BaseFileWizard::generateFileList()
+{
+    QString errorMessage;
+    m_files = m_factory->generateFiles(this, &errorMessage);
+    if (m_files.empty()) {
+        QMessageBox::critical(parentWidget(), tr("File Generation Failure"), errorMessage);
+        reject();
+    }
+}
+
+} // namespace Core