Clang: Track visibility timepoint of documents

This enables determination of "most recenlty used" documents, which is
needed for a follow-up change.

Change-Id: I7b2c9001fd00173044983780e99817b4416e280e
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

3 files changed, 16 insertions, 3 deletions

diff --git a/src/tools/clangbackend/ipcsource/clangdocument.cpp b/src/tools/clangbackend/ipcsource/clangdocument.cpp
index 3cfcfabe09..933bf61276 100644
--- a/src/tools/clangbackend/ipcsource/clangdocument.cpp
+++ b/src/tools/clangbackend/ipcsource/clangdocument.cpp
@@ -71,6 +71,8 @@ public:
 
     uint documentRevision = 0;
 
+    TimePoint visibleTimePoint;
+
     TimePoint isDirtyChangeTimePoint;
     bool isDirty = false;
 
@@ -245,13 +247,22 @@ bool Document::isVisibleInEditor() const
     return d->isVisibleInEditor;
 }
 
-void Document::setIsVisibleInEditor(bool isVisibleInEditor)
+void Document::setIsVisibleInEditor(bool isVisibleInEditor, const TimePoint &timePoint)
 {
     checkIfNull();
 
+    if (isVisibleInEditor)
+        d->visibleTimePoint = timePoint;
     d->isVisibleInEditor = isVisibleInEditor;
 }
 
+TimePoint Document::visibleTimePoint() const
+{
+    checkIfNull();
+
+    return d->visibleTimePoint;;
+}
+
 bool Document::isDirty() const
 {
     checkIfNull();
diff --git a/src/tools/clangbackend/ipcsource/clangdocument.h b/src/tools/clangbackend/ipcsource/clangdocument.h
index 15555ace10..48dc32acee 100644
--- a/src/tools/clangbackend/ipcsource/clangdocument.h
+++ b/src/tools/clangbackend/ipcsource/clangdocument.h
@@ -97,7 +97,8 @@ public:
     void setIsUsedByCurrentEditor(bool isUsedByCurrentEditor);
 
     bool isVisibleInEditor() const;
-    void setIsVisibleInEditor(bool isVisibleInEditor);
+    void setIsVisibleInEditor(bool isVisibleInEditor, const TimePoint &timePoint);
+    TimePoint visibleTimePoint() const;
 
     bool isDirty() const;
     TimePoint isDirtyTimeChangePoint() const;
diff --git a/src/tools/clangbackend/ipcsource/clangdocuments.cpp b/src/tools/clangbackend/ipcsource/clangdocuments.cpp
index 7ae7106cc8..5fc8f294a7 100644
--- a/src/tools/clangbackend/ipcsource/clangdocuments.cpp
+++ b/src/tools/clangbackend/ipcsource/clangdocuments.cpp
@@ -117,8 +117,9 @@ void Documents::setUsedByCurrentEditor(const Utf8String &filePath)
 
 void Documents::setVisibleInEditors(const Utf8StringVector &filePaths)
 {
+    const TimePoint timePoint = Clock::now();
     for (Document &document : documents_)
-        document.setIsVisibleInEditor(filePaths.contains(document.filePath()));
+        document.setIsVisibleInEditor(filePaths.contains(document.filePath()), timePoint);
 }
 
 const Document &Documents::document(const Utf8String &filePath, const Utf8String &projectPartId) const