MimeDatabase: Provide access to mime magic rules

Change-Id: I9d03db685200e86f71e15fe596b67db1d386eb19
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/libs/utils/mimetypes/mimedatabase.cpp

@@ -37,6 +37,7 @@
 
 #include "mimedatabase_p.h"
 
+#include "mimemagicrule_p.h"
 #include "mimeprovider_p.h"
 #include "mimetype_p.h"
 
@@ -710,3 +711,10 @@ QList<MimeType> MimeDatabase::allMimeTypes() const
 
     \value MatchContent The file content is used to look for a match
 */
+
+QMap<int, QList<MimeMagicRule> > MimeDatabase::magicRulesForMimeType(const MimeType &mimeType)
+{
+    auto d = MimeDatabasePrivate::instance();
+    QMutexLocker locker(&d->mutex);
+    return d->provider()->magicRulesForMimeType(mimeType);
+}

src/libs/utils/mimetypes/mimedatabase.h

@@ -35,6 +35,7 @@
 #define XMIMEDATABASE_H
 
 #include "mimetype.h"
+#include "mimemagicrule_p.h"
 
 #include <utils/utils_global.h>
 
@@ -87,6 +88,7 @@ public:
     static QString allFiltersString(QString *allFilesFilter = 0);
     static QStringList allGlobPatterns();
     static MimeType bestMatch(const QString &fileName, const QList<MimeType> &types);
+    static QMap<int, QList<Internal::MimeMagicRule> > magicRulesForMimeType(const MimeType &mimeType); // priority -> rules
 
 private:
     Internal::MimeDatabasePrivate *d;

src/libs/utils/mimetypes/mimemagicrule_p.h

@@ -45,16 +45,22 @@
 // We mean it.
 //
 
+#include <utils/utils_global.h>
+
 #include <QtCore/qbytearray.h>
 #include <QtCore/qscopedpointer.h>
 #include <QtCore/qlist.h>
+#include <QtCore/qmap.h>
 
 namespace Utils {
+
+class MimeType;
+
 namespace Internal {
 
 class MimeMagicRulePrivate;
 
-class MimeMagicRule
+class QTCREATOR_UTILS_EXPORT MimeMagicRule
 {
 public:
     enum Type { Invalid = 0, String, Host16, Host32, Big16, Big32, Little16, Little32, Byte };

src/libs/utils/mimetypes/mimeprovider.cpp

@@ -793,6 +793,16 @@ MimeType MimeXMLProvider::bestMatchByMagic(const QByteArray &data, const QList<M
     return mimeTypeForName(candidate);
 }
 
+QMap<int, QList<MimeMagicRule> > MimeXMLProvider::magicRulesForMimeType(const MimeType &mimeType)
+{
+    QMap<int, QList<MimeMagicRule> > result;
+    foreach (const MimeMagicRuleMatcher &matcher, m_magicMatchers) {
+        if (mimeType.matchesName(matcher.mimetype()))
+            result[matcher.priority()].append(matcher.magicRules());
+    }
+    return result;
+}
+
 void MimeXMLProvider::ensureLoaded()
 {
     if (!m_loaded /*|| shouldCheck()*/) {

src/libs/utils/mimetypes/mimeprovider_p.h

@@ -46,6 +46,7 @@
 //
 
 #include "mimedatabase_p.h"
+#include "mimemagicrule_p.h"
 
 #include <QtCore/qdatetime.h>
 #include <QtCore/qset.h>
@@ -76,6 +77,7 @@ public:
     // Qt Creator additions
     virtual QStringList bestMatchByFileName(const QString &fileName, const QList<MimeType> &types) = 0;
     virtual MimeType bestMatchByMagic(const QByteArray &data, const QList<MimeType> &types, int *accuracyPtr) = 0;
+    virtual QMap<int, QList<MimeMagicRule> > magicRulesForMimeType(const MimeType &mimeType) = 0;
 
     MimeDatabasePrivate *m_db;
 protected:
@@ -156,6 +158,7 @@ public:
     void addFile(const QString &filePath);
     QStringList bestMatchByFileName(const QString &fileName, const QList<MimeType> &types);
     MimeType bestMatchByMagic(const QByteArray &data, const QList<MimeType> &types, int *accuracyPtr);
+    QMap<int, QList<MimeMagicRule> > magicRulesForMimeType(const MimeType &mimeType);
 
 private:
     void ensureLoaded();