Generic Project: cut common part of path in project explorer

This is necessary, if the project files on a
different directory than the source files. In this case, the project
explorer will show the full path e.g. in windows starting by C: for each
directory until the source files.

use-case:
some directory
|- project directory
   |- *.creator & *.files & ... generic project files
|- source directory
   |- some sub-directories and the source files

Fixes: QTCREATORBUG-19454
Change-Id: I95eee4afdc11adf4281220edc5f6ff29da41a3a5
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>

2 files changed, 23 insertions, 1 deletions

diff --git a/src/plugins/genericprojectmanager/genericproject.cpp b/src/plugins/genericprojectmanager/genericproject.cpp
index d8e9f8458b..d1edc12eb3 100644
--- a/src/plugins/genericprojectmanager/genericproject.cpp
+++ b/src/plugins/genericprojectmanager/genericproject.cpp
@@ -382,6 +382,23 @@ void GenericProject::parseProject(RefreshOptions options)
     }
 }
 
+QString GenericProject::findCommonSourceRoot(const QStringList &list)
+{
+    QString root = list.front();
+    for (const QString &item : list) {
+        if (root.length() > item.length())
+            root.truncate(item.length());
+
+        for (int i = 0; i < root.length(); ++i) {
+            if (root[i] != item[i]) {
+                root.truncate(i);
+                break;
+            }
+        }
+    }
+    return QFileInfo(root).absolutePath();
+}
+
 void GenericProject::refresh(RefreshOptions options)
 {
     emitParsingStarted();
@@ -390,11 +407,14 @@ void GenericProject::refresh(RefreshOptions options)
     if (options & Files) {
         auto newRoot = std::make_unique<GenericProjectNode>(this);
 
+        // find the common base directory of all source files
+        Utils::FileName baseDir = FileName::fromFileInfo(QFileInfo(findCommonSourceRoot(m_files)));
+
         for (const QString &f : m_files) {
             FileType fileType = FileType::Source; // ### FIXME
             if (f.endsWith(".qrc"))
                 fileType = FileType::Resource;
-            newRoot->addNestedNode(std::make_unique<FileNode>(FileName::fromString(f), fileType));
+            newRoot->addNestedNode(std::make_unique<FileNode>(FileName::fromString(f), fileType), baseDir);
         }
 
         newRoot->addNestedNode(std::make_unique<FileNode>(FileName::fromString(m_filesFileName),
@@ -408,6 +428,7 @@ void GenericProject::refresh(RefreshOptions options)
         newRoot->addNestedNode(std::make_unique<FileNode>(FileName::fromString(m_cflagsFileName),
                                                           FileType::Project));
 
+        newRoot->compress();
         setRootProjectNode(std::move(newRoot));
     }
 
diff --git a/src/plugins/genericprojectmanager/genericproject.h b/src/plugins/genericprojectmanager/genericproject.h
index 7202d91810..f713bdb24b 100644
--- a/src/plugins/genericprojectmanager/genericproject.h
+++ b/src/plugins/genericprojectmanager/genericproject.h
@@ -66,6 +66,7 @@ private:
     QStringList processEntries(const QStringList &paths,
                                QHash<QString, QString> *map = nullptr) const;
 
+    static QString findCommonSourceRoot(const QStringList &list);
     void refreshCppCodeModel();
     void updateDeploymentData();
     void activeTargetWasChanged();