Vcs: Add Fossil SCM integration plugin

* Qt Creator base-commit: f77af5e336
* Stand-alone plugin source tree for integration into qtc super-project
* Original release: https://github.com/nomadbyte/qtcreator-plugin-fossil
* Adapted from Bazaar plugin implementation

Configuring Fossil
------------------

1. Download the [Fossil SCM client](http://fossil-scm.org) and install `fossil`
   executable file in your `PATH`.

2. Create or designate a directory to store local Fossil repositories and
   remote clones. For example: `~/fossils/qt`.

3. Configure Version Control Options for the Fossil plugin to use
   the designated directory as `Local Repositories Default path`.

Now Fossil should become available as a VCS choice to create new local
repositories, as well as a choice in `New File or Project` to clone a
remote Fossil repository.

Change-Id: I630184c1b344184d9e08ae2fc24a5e4766f834b9
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

plugins/fossil/configuredialog.cpp

@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** Copyright (c) 2016 Artur Shepilko
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "configuredialog.h"
+#include "ui_configuredialog.h"
+
+#include "fossilsettings.h"
+
+#include <utils/pathchooser.h>
+
+#include <QDir>
+
+namespace Fossil {
+namespace Internal {
+
+class ConfigureDialogPrivate {
+public:
+    RepositorySettings settings() {
+        m_settings.user = m_ui.userLineEdit->text().trimmed();
+        m_settings.sslIdentityFile = m_ui.sslIdentityFilePathChooser->path();
+        m_settings.autosync =
+                (m_ui.disableAutosyncCheckBox->isChecked() ? RepositorySettings::AutosyncOff
+                                                           : RepositorySettings::AutosyncOn);
+        return m_settings;
+    }
+
+    void updateUi() {
+        m_ui.userLineEdit->setText(m_settings.user.trimmed());
+        m_ui.userLineEdit->selectAll();
+        m_ui.sslIdentityFilePathChooser->setPath(QDir::toNativeSeparators(m_settings.sslIdentityFile));
+        m_ui.disableAutosyncCheckBox->setChecked(m_settings.autosync == RepositorySettings::AutosyncOff);
+    }
+
+    Ui::ConfigureDialog m_ui;
+    RepositorySettings m_settings;
+};
+
+ConfigureDialog::ConfigureDialog(QWidget *parent) : QDialog(parent),
+    d(new ConfigureDialogPrivate)
+{
+    d->m_ui.setupUi(this);
+    d->m_ui.sslIdentityFilePathChooser->setExpectedKind(Utils::PathChooser::File);
+    d->m_ui.sslIdentityFilePathChooser->setPromptDialogTitle(tr("SSL/TLS Identity Key"));
+    setWindowTitle(tr("Configure Repository"));
+    d->updateUi();
+}
+
+ConfigureDialog::~ConfigureDialog()
+{
+    delete d;
+}
+
+const RepositorySettings ConfigureDialog::settings() const
+{
+    return d->settings();
+}
+
+void ConfigureDialog::setSettings(const RepositorySettings &settings)
+{
+    d->m_settings = settings;
+    d->updateUi();
+}
+
+void ConfigureDialog::changeEvent(QEvent *e)
+{
+    QDialog::changeEvent(e);
+    switch (e->type()) {
+    case QEvent::LanguageChange:
+        d->m_ui.retranslateUi(this);
+        break;
+    default:
+        break;
+    }
+}
+
+} // namespace Internal
+} // namespace Fossil