Clang: Add sorting by priority

The priority is adjusted too provide a better completion list.

Change-Id: I1ebed1996f660046843e0c5249a91e8c2b1eeb88
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/clangcodemodel/clangassistproposalmodel.cpp

@@ -32,6 +32,10 @@
 
 #include "clangassistproposalmodel.h"
 
+#include <texteditor/codeassist/assistproposalitem.h>
+
+#include <algorithm>
+
 namespace ClangCodeModel {
 namespace Internal {
 
@@ -56,6 +60,19 @@ bool ClangAssistProposalModel::isSortable(const QString &/*prefix*/) const
     return true;
 }
 
+void ClangAssistProposalModel::sort(const QString &/*prefix*/)
+{
+    using TextEditor::AssistProposalItem;
+
+    auto currentItemsCompare = [](AssistProposalItem *first, AssistProposalItem *second) {
+        return (first->order() > 0
+                && (first->order() < second->order()
+                     || (first->order() == second->order() && first->text() < second->text())));
+    };
+
+    std::sort(m_currentItems.begin(), m_currentItems.end(), currentItemsCompare);
+}
+
 } // namespace Internal
 } // namespace ClangCodeModel
 

src/plugins/clangcodemodel/clangassistproposalmodel.h

@@ -48,6 +48,7 @@ public:
     {}
 
     bool isSortable(const QString &prefix) const override;
+    void sort(const QString &prefix) override;
 
     static bool replaceDotForArrow(IAssistProposalModel *model);
 

src/tools/clangbackend/ipcsource/codecompletionsextractor.cpp

@@ -64,6 +64,7 @@ bool CodeCompletionsExtractor::next()
         extractAvailability();
         extractHasParameters();
         extractCompletionChunks();
+        adaptPriority();
 
         return true;
     }
@@ -251,6 +252,48 @@ void CodeCompletionsExtractor::extractCompletionChunks()
     currentCodeCompletion_.setChunks(CodeCompletionChunkConverter::extract(currentCxCodeCompleteResult.CompletionString));
 }
 
+void CodeCompletionsExtractor::adaptPriority()
+{
+    decreasePriorityForDestructors();
+    decreasePriorityForNonAvailableCompletions();
+    decreasePriorityForQObjectInternals();
+    decreasePriorityForSignals();
+}
+
+void CodeCompletionsExtractor::decreasePriorityForNonAvailableCompletions()
+{
+    if (currentCodeCompletion_.availability() != CodeCompletion::Available)
+        currentCodeCompletion_.setPriority(currentCodeCompletion_.priority() * 100);
+}
+
+void CodeCompletionsExtractor::decreasePriorityForDestructors()
+{
+    if (currentCodeCompletion_.completionKind() == CodeCompletion::DestructorCompletionKind)
+        currentCodeCompletion_.setPriority(currentCodeCompletion_.priority() * 100);
+}
+
+void CodeCompletionsExtractor::decreasePriorityForSignals()
+{
+    if (currentCodeCompletion_.completionKind() == CodeCompletion::SignalCompletionKind)
+        currentCodeCompletion_.setPriority(currentCodeCompletion_.priority() * 100);
+}
+
+void CodeCompletionsExtractor::decreasePriorityForQObjectInternals()
+{
+    quint32 priority = currentCodeCompletion_.priority();
+
+    if (currentCodeCompletion_.text().startsWith("qt_"))
+        priority *= 100;
+
+    if (currentCodeCompletion_.text() == Utf8StringLiteral("metaObject"))
+        priority *= 10;
+
+    if (currentCodeCompletion_.text() == Utf8StringLiteral("staticMetaObject"))
+        priority *= 100;
+
+    currentCodeCompletion_.setPriority(priority);
+}
+
 bool CodeCompletionsExtractor::hasText(const Utf8String &text, CXCompletionString cxCompletionString) const
 {
     const uint completionChunkCount = clang_getNumCompletionChunks(cxCompletionString);

src/tools/clangbackend/ipcsource/codecompletionsextractor.h

@@ -67,6 +67,12 @@ private:
     void extractHasParameters();
     void extractCompletionChunks();
 
+    void adaptPriority();
+    void decreasePriorityForNonAvailableCompletions();
+    void decreasePriorityForDestructors();
+    void decreasePriorityForSignals();
+    void decreasePriorityForQObjectInternals();
+
     bool hasText(const Utf8String &text, CXCompletionString cxCompletionString) const;
 
 private: