From ed49052f6a82ea6ce13ad82e37d77df7696c1e45 Mon Sep 17 00:00:00 2001
From: Thomas Hartmann <Thomas.Hartmann@theqtcompany.com>
Date: Tue, 17 Feb 2015 12:10:04 +0100
Subject: [PATCH] QmlJSEditor: Adding and exporting helper function for usages

This patch adds and exports findUsageOfType() which can be used in
e.g. the Qt Quick Desigener.

Change-Id: I6e87df746bdb377485da052823f86b89d638ac2f
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@theqtcompany.com>
---
 .../qmljseditor/qmljsfindreferences.cpp       | 27 +++++++++++++++++++
 src/plugins/qmljseditor/qmljsfindreferences.h |  6 ++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/src/plugins/qmljseditor/qmljsfindreferences.cpp b/src/plugins/qmljseditor/qmljsfindreferences.cpp
index c3ad1ec7d13..2c518ca52ed 100644
--- a/src/plugins/qmljseditor/qmljsfindreferences.cpp
+++ b/src/plugins/qmljseditor/qmljsfindreferences.cpp
@@ -920,6 +920,33 @@ void FindReferences::renameUsages(const QString &fileName, quint32 offset,
     m_watcher.setFuture(result);
 }
 
+QList<FindReferences::Usage> FindReferences::findUsageOfType(const QString &fileName, const QString typeName)
+{
+    QList<Usage> usages;
+    ModelManagerInterface *modelManager = ModelManagerInterface::instance();
+
+    Document::Ptr doc = modelManager->snapshot().document(fileName);
+    if (!doc)
+        return usages;
+
+    Link link(modelManager->snapshot(), modelManager->defaultVContext(doc->language(), doc), modelManager->builtins(doc));
+    ContextPtr context = link();
+    ScopeChain scopeChain(doc, context);
+
+    const ObjectValue *targetValue = scopeChain.context()->lookupType(doc.data(), QStringList(typeName));
+
+    QmlJS::Snapshot snapshot =  modelManager->snapshot();
+
+    foreach (const QmlJS::Document::Ptr &doc, snapshot) {
+        FindTypeUsages findUsages(doc, context);
+        FindTypeUsages::Result results = findUsages(typeName, targetValue);
+        foreach (const AST::SourceLocation &loc, results) {
+            usages.append(Usage(doc->fileName(), matchingLine(loc.offset, doc->source()), loc.startLine, loc.startColumn - 1, loc.length));
+        }
+    }
+    return usages;
+}
+
 void FindReferences::displayResults(int first, int last)
 {
     // the first usage is always a dummy to indicate we now start searching
diff --git a/src/plugins/qmljseditor/qmljsfindreferences.h b/src/plugins/qmljseditor/qmljsfindreferences.h
index c05a2c42777..1435c40395f 100644
--- a/src/plugins/qmljseditor/qmljsfindreferences.h
+++ b/src/plugins/qmljseditor/qmljsfindreferences.h
@@ -31,6 +31,8 @@
 #ifndef QMLJSFINDREFERENCES_H
 #define QMLJSFINDREFERENCES_H
 
+#include "qmljseditor_global.h"
+
 #include <QMutex>
 #include <QObject>
 #include <QFuture>
@@ -48,7 +50,7 @@ class SearchResult;
 
 namespace QmlJSEditor {
 
-class FindReferences: public QObject
+class QMLJSEDITOR_EXPORT FindReferences: public QObject
 {
     Q_OBJECT
 public:
@@ -81,6 +83,8 @@ public:
     void renameUsages(const QString &fileName, quint32 offset,
                       const QString &replacement = QString());
 
+    static QList<Usage> findUsageOfType(const QString &fileName, const QString typeName);
+
 private Q_SLOTS:
     void displayResults(int first, int last);
     void searchFinished();