ProjectExplorer: Select the current node with more magic

If there are multiple file nodes for the same file, check in how many
project views they are expanded and select the one that is expanded
in most.

Task-number: QTCREATORBUG-12595
Change-Id: Ic4a640a80b8244b30b8dec62248aebeeaf9216cf
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/projectexplorer.cpp

@@ -1886,7 +1886,7 @@ void ProjectExplorerPlugin::setCurrent(Project *project, QString filePath, Node
     if (node)
         filePath = pathFor(node);
     else
-        node = SessionManager::nodeForFile(filePath, project);
+        node = ProjectTreeWidget::nodeForFile(filePath, project);
 
     bool projectChanged = false;
     if (d->m_currentProject != project) {

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -43,6 +43,7 @@
 #include <coreplugin/find/treeviewfind.h>
 
 #include <utils/navigationtreeview.h>
+#include <utils/algorithm.h>
 
 #include <QDebug>
 #include <QSettings>
@@ -57,6 +58,8 @@ using namespace Core;
 using namespace ProjectExplorer;
 using namespace ProjectExplorer::Internal;
 
+QList<ProjectTreeWidget *> ProjectTreeWidget::m_projectTreeWidgets;
+
 namespace {
 
 class ProjectTreeItemDelegate : public QStyledItemDelegate
@@ -178,6 +181,59 @@ ProjectTreeWidget::ProjectTreeWidget(QWidget *parent)
     connect(m_toggleSync, SIGNAL(clicked(bool)), this, SLOT(toggleAutoSynchronization()));
 
     setAutoSynchronization(true);
+
+    m_projectTreeWidgets << this;
+}
+
+ProjectTreeWidget::~ProjectTreeWidget()
+{
+    m_projectTreeWidgets.removeOne(this);
+}
+
+// returns how many nodes need to be expanded to make node visible
+int ProjectTreeWidget::expandedCount(Node *node)
+{
+    if (m_projectTreeWidgets.isEmpty())
+        return 0;
+    FlatModel *model = m_projectTreeWidgets.first()->m_model;
+    QModelIndex index = model->indexForNode(node);
+    if (!index.isValid())
+        return 0;
+
+    int count = 0;
+    foreach (ProjectTreeWidget *tree, m_projectTreeWidgets) {
+        QModelIndex idx = index;
+        while (idx.isValid() && idx != tree->m_view->rootIndex()) {
+            if (!tree->m_view->isExpanded(idx))
+                ++count;
+            idx = model->parent(idx);
+        }
+    }
+    return count;
+}
+
+Node *ProjectTreeWidget::nodeForFile(const QString &fileName, Project *project)
+{
+    Node *bestNode = 0;
+    int bestNodeExpandCount = INT_MAX;
+
+    foreach (Node *node, SessionManager::nodesForFile(fileName, project)) {
+        if (!bestNode) {
+            bestNode = node;
+            bestNodeExpandCount = ProjectTreeWidget::expandedCount(node->parentFolderNode());
+        } else if (node->nodeType() < bestNode->nodeType()) {
+            bestNode = node;
+            bestNodeExpandCount = ProjectTreeWidget::expandedCount(node->parentFolderNode());
+        } else if (node->nodeType() == bestNode->nodeType()) {
+            int nodeExpandCount = ProjectTreeWidget::expandedCount(node->parentFolderNode());
+            if (nodeExpandCount < bestNodeExpandCount) {
+                bestNode = node;
+                bestNodeExpandCount = ProjectTreeWidget::expandedCount(node->parentFolderNode());
+            }
+        }
+    }
+
+    return bestNode;
 }
 
 void ProjectTreeWidget::disableAutoExpand()

src/plugins/projectexplorer/projecttreewidget.h

@@ -54,6 +54,7 @@ class ProjectTreeWidget : public QWidget
     Q_OBJECT
 public:
     explicit ProjectTreeWidget(QWidget *parent = 0);
+    ~ProjectTreeWidget();
 
     bool autoSynchronization() const;
     void setAutoSynchronization(bool sync, bool syncNow = true);
@@ -61,6 +62,8 @@ public:
     bool generatedFilesFilter();
     QToolButton *toggleSync();
 
+    static Node *nodeForFile(const QString &fileName, Project *project);
+
 public slots:
     void toggleAutoSynchronization();
     void editCurrentItem();
@@ -88,6 +91,7 @@ private slots:
 private:
     void recursiveLoadExpandData(const QModelIndex &index, const QSet<QString> &data);
     void recursiveSaveExpandData(const QModelIndex &index, QStringList *data);
+    static int expandedCount(Node *node);
     ProjectExplorerPlugin *m_explorer;
     QTreeView *m_view;
     FlatModel *m_model;
@@ -99,6 +103,8 @@ private:
     QString m_modelId;
     bool m_autoSync;
     bool m_autoExpand;
+
+    static QList<ProjectTreeWidget *> m_projectTreeWidgets;
     friend class ProjectTreeWidgetFactory;
 };
 

src/plugins/projectexplorer/session.cpp

@@ -45,6 +45,7 @@
 #include <texteditor/itexteditor.h>
 
 #include <utils/stylehelper.h>
+#include <utils/algorithm.h>
 
 #include <QDebug>
 #include <QDir>
@@ -518,23 +519,30 @@ Project *SessionManager::projectForNode(Node *node)
     return 0;
 }
 
-Node *SessionManager::nodeForFile(const QString &fileName, Project *project)
+QList<Node *> SessionManager::nodesForFile(const QString &fileName, Project *project)
 {
-    Node *node = 0;
     if (!project)
         project = projectForFile(fileName);
 
     if (project) {
         FindNodesForFileVisitor findNodes(fileName);
         project->rootProjectNode()->accept(&findNodes);
+        return findNodes.nodes();
+    }
 
-        foreach (Node *n, findNodes.nodes()) {
+    return QList<Node *>();
+}
+
+// node for file returns a randomly selected node if there are multiple
+// prefer to use nodesForFile and figure out which node you want
+Node *SessionManager::nodeForFile(const QString &fileName, Project *project)
+{
+    Node *node = 0;
+    foreach (Node *n, nodesForFile(fileName, project)) {
         // prefer file nodes
         if (!node || (node->nodeType() != FileNodeType && n->nodeType() == FileNodeType))
             node = n;
     }
-    }
-
     return node;
 }
 

src/plugins/projectexplorer/session.h

@@ -116,6 +116,7 @@ public:
     static SessionNode *sessionNode();
 
     static Project *projectForNode(ProjectExplorer::Node *node);
+    static QList<Node *> nodesForFile(const QString &fileName, Project *project = 0);
     static Node *nodeForFile(const QString &fileName, Project *project = 0);
     static Project *projectForFile(const QString &fileName);