vcl: change ImplFontEntry to LogicalFontInstance

There is a TODO in the code that suggests to do this, when I looked at the
collaboration diagram on Doxygen things made a LOT more sense.

Change-Id: If335498bb70872ffa5738cc5c17660faec84c35e
Reviewed-on: https://gerrit.libreoffice.org/21257
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/vcl/inc/fontinstance.hxx b/vcl/inc/fontinstance.hxx
new file mode 100644
index 000000000000..01f4c5900f75
--- /dev/null
+++ b/vcl/inc/fontinstance.hxx
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_FONTENTRY_HXX
+#define INCLUDED_VCL_INC_FONTENTRY_HXX
+
+#include <sal/types.h>
+#include <vcl/dllapi.h>
+
+#include "fontselect.hxx"
+#include "fontattributes.hxx"
+
+#include <unordered_map>
+
+class ImplFontCache;
+class ConvertChar;
+
+// TODO: allow sharing of metrics for related fonts
+
+class VCL_PLUGIN_PUBLIC LogicalFontInstance
+{
+public:
+    explicit        LogicalFontInstance( const FontSelectPattern& );
+    virtual         ~LogicalFontInstance();
+
+public: // TODO: make data members private
+    ImplFontCache * m_pFontCache;
+    FontSelectPattern  maFontSelData;          // FontSelectionData
+    ImplFontAttributes  maFontAttributes;       // Font attributes
+    const ConvertChar* mpConversion;           // used e.g. for StarBats->StarSymbol
+
+    long            mnLineHeight;
+    sal_uLong       mnRefCount;
+    sal_uInt16      mnSetFontFlags;         // Flags returned by SalGraphics::SetFont()
+    short           mnOwnOrientation;       // text angle if lower layers don't rotate text themselves
+    short           mnOrientation;          // text angle in 3600 system
+    bool            mbInit;                 // true if maFontAttributes member is valid
+
+    void            AddFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
+    bool            GetFallbackForUnicode( sal_UCS4, FontWeight eWeight, OUString* pFontName ) const;
+    void            IgnoreFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
+
+private:
+    // cache of Unicode characters and replacement font names
+    // TODO: a fallback map can be shared with many other ImplFontEntries
+    // TODO: at least the ones which just differ in orientation, stretching or height
+    typedef ::std::unordered_map< ::std::pair<sal_UCS4,FontWeight>, OUString > UnicodeFallbackList;
+    UnicodeFallbackList* mpUnicodeFallbackList;
+};
+
+#endif // INCLUDED_VCL_INC_FONTENTRY_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */