Add show in editor task handler

* Add a taskhandler used to show the file/line a task is referring
   to in the editor.

 * This is not yet used!

src/plugins/projectexplorer/showineditortaskhandler.cpp

@@ -0,0 +1,65 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "showineditortaskhandler.h"
+
+#include "projectexplorerconstants.h"
+#include "task.h"
+
+#include <coreplugin/editormanager/editormanager.h>
+#include <texteditor/basetexteditor.h>
+
+#include <QtGui/QAction>
+#include <QtCore/QFileInfo>
+
+using namespace ProjectExplorer::Internal;
+
+ShowInEditorTaskHandler::ShowInEditorTaskHandler() :
+    ITaskHandler(QLatin1String(Constants::SHOW_TASK_IN_EDITOR))
+{ }
+
+bool ShowInEditorTaskHandler::canHandle(const ProjectExplorer::Task &task)
+{
+    QFileInfo fi(task.file);
+    return fi.exists() && fi.isFile() && fi.isReadable();
+}
+
+void ShowInEditorTaskHandler::handle(const ProjectExplorer::Task &task)
+{
+    QFileInfo fi(task.file);
+    TextEditor::BaseTextEditor::openEditorAt(fi.canonicalFilePath(), task.line);
+    Core::EditorManager::instance()->ensureEditorManagerVisible();
+}
+
+QAction *ShowInEditorTaskHandler::createAction(QObject *parent)
+{
+    QAction *showAction = new QAction(tr("&Show in editor"), parent);
+    showAction->setToolTip(tr("Show task location in an editor"));
+    return showAction;
+}