QmlJS: Add quick fix to wrap element in Loader.

Change-Id: Ie8b1624abfd9faa8c6153ad99e48964d597d543c
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/qmljseditor/qmljswrapinloader.cpp

@@ -0,0 +1,150 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at info@qt.nokia.com.
+**
+**************************************************************************/
+
+#include "qmljswrapinloader.h"
+#include "qmljsquickfixassist.h"
+
+#include <coreplugin/ifile.h>
+
+#include <qmljs/parser/qmljsast_p.h>
+#include <qmljs/qmljsdocument.h>
+#include <qmljs/qmljsutils.h>
+#include <qmljs/qmljsbind.h>
+#include <qmljstools/qmljsrefactoringchanges.h>
+
+#include <QtCore/QDir>
+#include <QtCore/QFileInfo>
+
+using namespace QmlJS;
+using namespace QmlJS::AST;
+using namespace QmlJSEditor;
+using namespace QmlJSEditor::Internal;
+using namespace QmlJSTools;
+
+namespace {
+
+class Operation: public QmlJSQuickFixOperation
+{
+    UiObjectDefinition *m_objDef;
+
+public:
+    Operation(const QSharedPointer<const QmlJSQuickFixAssistInterface> &interface,
+              UiObjectDefinition *objDef)
+        : QmlJSQuickFixOperation(interface, 0)
+        , m_objDef(objDef)
+    {
+        Q_ASSERT(m_objDef != 0);
+
+        setDescription(WrapInLoader::tr("Wrap Component in Loader"));
+    }
+
+    QString findFreeName(const QString &base)
+    {
+        QString tryName = base;
+        int extraNumber = 1;
+        const ObjectValue *found = 0;
+        const ScopeChain &scope = assistInterface()->semanticInfo().scopeChain();
+        forever {
+            scope.lookup(tryName, &found);
+            if (!found || extraNumber > 1000)
+                break;
+            tryName = base + QString::number(extraNumber++);
+        }
+        return tryName;
+    }
+
+    virtual void performChanges(QmlJSRefactoringFilePtr currentFile,
+                                const QmlJSRefactoringChanges &)
+    {
+        UiScriptBinding *idBinding;
+        const QString id = idOfObject(m_objDef, &idBinding);
+        QString baseName = id;
+        if (baseName.isEmpty()) {
+            for (UiQualifiedId *it = m_objDef->qualifiedTypeNameId; it; it = it->next) {
+                if (!it->next)
+                    baseName = it->name.toString();
+            }
+        }
+
+        // find ids
+        const QString componentId = findFreeName(QLatin1String("component_") + baseName);
+        const QString loaderId = findFreeName(QLatin1String("loader_") + baseName);
+
+        Utils::ChangeSet changes;
+        int objDefStart = m_objDef->firstSourceLocation().begin();
+        int objDefEnd = m_objDef->lastSourceLocation().end();
+        QString comment = WrapInLoader::tr(
+                    "// TODO: Move position bindings from the component to the Loader.\n"
+                    "//       Check all uses of 'parent' inside the root element of the component.\n");
+        if (idBinding) {
+            comment += WrapInLoader::tr(
+                        "//       Rename all outer uses of the id '%1' to '%2.item'.\n").arg(
+                        id, loaderId);
+        }
+        changes.insert(objDefStart, comment +
+                       QString("Component {\n"
+                               "    id: %1\n").arg(componentId));
+        changes.insert(objDefEnd, QString("\n"
+                                          "}\n"
+                                          "Loader {\n"
+                                          "    id: %2\n"
+                                          "    sourceComponent: %1\n"
+                                          "}\n").arg(componentId, loaderId));
+        currentFile->setChangeSet(changes);
+        currentFile->appendIndentRange(Range(objDefStart, objDefEnd));
+        currentFile->apply();
+    }
+};
+
+} // end of anonymous namespace
+
+
+QList<QmlJSQuickFixOperation::Ptr> WrapInLoader::match(
+    const QSharedPointer<const QmlJSQuickFixAssistInterface> &interface)
+{
+    const int pos = interface->currentFile()->cursor().position();
+
+    QList<Node *> path = interface->semanticInfo().rangePath(pos);
+    for (int i = path.size() - 1; i >= 0; --i) {
+        Node *node = path.at(i);
+        if (UiObjectDefinition *objDef = cast<UiObjectDefinition *>(node)) {
+            if (!interface->currentFile()->isCursorOn(objDef->qualifiedTypeNameId))
+                return noResult();
+             // check that the node is not the root node
+            if (i > 0 && !cast<UiProgram*>(path.at(i - 1))) {
+                return singleResult(new Operation(interface, objDef));
+            }
+        }
+    }
+
+    return noResult();
+}