Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/sd/source/ui/inc/PreviewRenderer.hxx b/sd/source/ui/inc/PreviewRenderer.hxx
new file mode 100644
index 000000000..245f0b638
--- /dev/null
+++ b/sd/source/ui/inc/PreviewRenderer.hxx
@@ -0,0 +1,141 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <vcl/image.hxx>
+#include <memory>
+
+#include <svl/lstner.hxx>
+
+class SdPage;
+class VirtualDevice;
+
+namespace sd {
+
+class DrawDocShell;
+class DrawView;
+
+class PreviewRenderer
+    : public SfxListener
+{
+public:
+    /** Create a new preview renderer that takes some of its initial values
+        from the given output device.
+        @param bPaintFrame
+            When <TRUE/> (the default) then a frame is painted around the
+            preview.  This makes the actual preview smaller.
+    */
+    PreviewRenderer(const bool bPaintFrame = true);
+
+    virtual ~PreviewRenderer() override;
+
+    /** Render a page with the given pixel size.
+        Use this version when only the width of the preview is known to the
+        caller. The height is then calculated according to the aspect
+        ratio of the given page.
+        @param pPage
+            The page to render.
+        @param nWidth
+            The width of the preview in device coordinates.
+         The high contrast mode of the application is
+         ignored and the preview is rendered in normal mode.
+    */
+    Image RenderPage (
+        const SdPage* pPage,
+        const sal_Int32 nWidth);
+
+    /** Render a page with the given pixel size.
+        @param pPage
+            The page to render.
+        @param aPreviewPixelSize
+            The size in device coordinates of the preview.
+        @param bObeyHighContrastMode
+            When <FALSE/> then the high contrast mode of the application is
+            ignored and the preview is rendered in normal mode.  When
+            <TRUE/> and high contrast mode is active then the preview is
+            rendered in high contrast mode.
+        @param bDisplayPresentationObjects
+            When <FALSE/> then the PresObj place holders are not displayed
+            in the returned preview.
+    */
+    Image RenderPage (
+        const SdPage* pPage,
+        const Size aPreviewPixelSize,
+        const bool bObeyHighContrastMode,
+        const bool bDisplayPresentationObjects = true);
+
+    /** Render an image that contains the given substitution text instead of a
+        slide preview.
+        @param aPreviewPixelSize
+            The size in device coordinates of the image.
+    */
+    Image RenderSubstitution (
+        const Size& rPreviewPixelSize,
+        const OUString& sSubstitutionText);
+
+    /** Scale the given bitmap by keeping its aspect ratio to the desired
+        width.  Add a frame to it afterwards.
+    */
+    Image ScaleBitmap (
+        const BitmapEx& rBitmap,
+        int nWidth);
+
+protected:
+    virtual void Notify(SfxBroadcaster& rBC, const SfxHint& rHint) override;
+
+private:
+    ScopedVclPtr<VirtualDevice> mpPreviewDevice;
+    ::std::unique_ptr<DrawView> mpView;
+    DrawDocShell* mpDocShellOfView;
+    const Color maFrameColor;
+    const bool mbHasFrame;
+    static const int snSubstitutionTextSize;
+    // Width of the frame that is painted around the preview.
+    static const int snFrameWidth;
+
+    bool Initialize (
+        const SdPage* pPage,
+        const Size& rPixelSize,
+        const bool bObeyHighContrastMode);
+    void PaintPage (
+        const SdPage* pPage,
+        const bool bDisplayPresentationObjects);
+    void PaintSubstitutionText (const OUString& rSubstitutionText);
+    void PaintFrame();
+
+    /** Set up the map mode so that the given page is renderer into a bitmap
+        with the specified width.
+        @param rPage
+            The page for which the preview is created.
+        @param rPixelSize
+            The size of the resulting preview bitmap.  Note that this size
+            includes the frame.  The actual preview is smaller accordingly.
+     */
+    void SetupOutputSize (const SdPage& rPage, const Size& rPixelSize);
+
+    /** When mpView is empty then create a new view and initialize it.
+        Otherwise just initialize it.
+    */
+    void ProvideView (DrawDocShell* pDocShell);
+};
+
+} // end of namespace ::sd
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */