Vcs: Use correct project to trim down list of files on commit

Task-number: QTCREATORBUG-13955
Change-Id: I9961e981864f7dc261c2028fd3b80a36647a9a00
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/vcsbase/vcsprojectcache.cpp

@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://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 http://www.qt.io/terms-conditions.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, The Qt Company gives you certain additional
+** rights.  These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "vcsprojectcache.h"
+
+#include "vcsbasesubmiteditor.h"
+
+#include <projectexplorer/project.h>
+#include <projectexplorer/session.h>
+
+#include <utils/algorithm.h>
+#include <utils/qtcassert.h>
+
+#include <limits>
+
+namespace {
+
+class PathMatcher
+{
+public:
+    PathMatcher() : m_count(std::numeric_limits<int>::max()), m_project(0) { }
+    ProjectExplorer::Project *project() { return m_project; }
+
+    void match(ProjectExplorer::Project *project,
+               const Utils::FileName &base, const Utils::FileName &child) {
+        int count = std::numeric_limits<int>::max();
+        if (child.isChildOf(base)) {
+            const QString relative = child.toString().mid(base.count() + 1);
+            count = relative.count(QLatin1Char('/'));
+        }
+        if (count < m_count) {
+            m_count = count;
+            m_project = project;
+        }
+    }
+
+private:
+    int m_count;
+    ProjectExplorer::Project *m_project;
+};
+
+} // namespace
+
+namespace VcsBase {
+namespace Internal {
+
+VcsProjectCache *VcsProjectCache::m_instance = 0;
+
+VcsProjectCache::VcsProjectCache()
+{
+    QTC_ASSERT(!m_instance, return);
+    m_instance = this;
+
+    connect(ProjectExplorer::SessionManager::instance(), &ProjectExplorer::SessionManager::projectAdded,
+            this, []() { VcsProjectCache::invalidate(); });
+    connect(ProjectExplorer::SessionManager::instance(), &ProjectExplorer::SessionManager::projectRemoved,
+            this, []() { VcsProjectCache::invalidate(); });
+}
+
+VcsProjectCache::~VcsProjectCache()
+{
+    m_instance = 0;
+}
+
+ProjectExplorer::Project *VcsProjectCache::projectFor(const QString &repo)
+{
+    ProjectExplorer::Project *project;
+
+    const int pos = Utils::indexOf(m_instance->m_cache,
+                                   [repo](const CacheNode &n) { return n.repository == repo; });
+    if (pos >= 0) {
+        if (pos > 0) {
+            m_instance->m_cache.prepend(m_instance->m_cache.at(pos));
+            m_instance->m_cache.removeAt(pos + 1);
+        }
+        return m_instance->m_cache.at(0).project;
+    }
+
+    project = projectForToplevel(Utils::FileName::fromString(repo));
+    m_instance->m_cache.prepend(CacheNode(repo, project));
+    while (m_instance->m_cache.count() > 10)
+        m_instance->m_cache.removeLast();
+
+    return project;
+}
+
+void VcsProjectCache::invalidate()
+{
+    m_instance->m_cache.clear();
+}
+
+void VcsProjectCache::create()
+{
+    new VcsProjectCache;
+}
+
+void VcsProjectCache::destroy()
+{
+    delete m_instance;
+}
+
+ProjectExplorer::Project *VcsProjectCache::projectForToplevel(const Utils::FileName &vcsTopLevel)
+{
+    PathMatcher parentMatcher;
+    PathMatcher childMatcher;
+    foreach (ProjectExplorer::Project *project, ProjectExplorer::SessionManager::projects()) {
+        const Utils::FileName projectDir = project->projectDirectory();
+        if (projectDir == vcsTopLevel)
+            return project;
+        parentMatcher.match(project, vcsTopLevel, projectDir);
+        childMatcher.match(project, projectDir, vcsTopLevel);
+    }
+
+    if (parentMatcher.project())
+        return parentMatcher.project();
+
+    return childMatcher.project();
+}
+
+} // Internal
+} // namespace VcsBase