Implement LibreOfficeKit gtk+ viewer widget.

Very basic, but works.

Change-Id: I0c521e833b53e13065e0be48e6fa767e44b29787

Repository.mk

@@ -524,6 +524,7 @@ $(eval $(call gb_Helper_register_libraries_for_install,PLAINLIBS_OOO,ooo, \
 	i18nlangtag \
 	i18nutil \
 	index_data \
+	$(if $(and $(ENABLE_GTK), $(filter LINUX,$(OS))), libreofficekitgtk) \
 	localedata_en \
 	localedata_es \
 	localedata_euro \

include/LibreOfficeKit/LibreOfficeKitGtk.h

+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_DESKTOP_INC_LIBREOFFICEKITGTK_H
+#define INCLUDED_DESKTOP_INC_LIBREOFFICEKITGTK_H
+
+#include <gtk/gtk.h>
+#include <gdk/gdk.h>
+
+#define LOK_USE_UNSTABLE_API
+#include <LibreOfficeKit/LibreOfficeKit.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#define LOK_DOCVIEW(obj)          GTK_CHECK_CAST (obj, lok_docview_get_type(), LOKDocView)
+#define LOK_DOCVIEW_CLASS(klass)  GTK_CHECK_CLASS_CAST (klass, lok_docview_get_type(), LOKDocViewClass)
+#define IS_LOK_DOCVIEW(obj)       GTK_CHECK_TYPE (obj, lok_docview_get_type())
+
+
+typedef struct _LOKDocView       LOKDocView;
+typedef struct _LOKDocViewClass  LOKDocViewClass;
+
+struct _LOKDocView
+{
+    GtkScrolledWindow scrollWindow;
+
+    GtkWidget* pEventBox;
+    GtkWidget* pCanvas;
+    GdkPixbuf* pPixBuf;
+
+    LibreOfficeKit* pOffice;
+    LibreOfficeKitDocument* pDocument;
+};
+
+struct _LOKDocViewClass
+{
+  GtkScrolledWindowClass parent_class;
+
+  void (*lok_docview) (LOKDocView* pDocView);
+};
+
+guint           lok_docview_get_type        (void);
+GtkWidget*      lok_docview_new             ( LibreOfficeKit* pOffice );
+gboolean        lok_docview_open_document   (LOKDocView* pDocView,
+                                             char* pPath);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file

libreofficekit/Library_libreofficekitgtk.mk

+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# 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/.
+#
+
+$(eval $(call gb_Library_Library,libreofficekitgtk))
+
+
+$(eval $(call gb_Library_use_externals,libreofficekitgtk,\
+    gtk \
+))
+
+$(eval $(call gb_Library_use_static_libraries,libreofficekitgtk,\
+    libreofficekit \
+))
+
+$(eval $(call gb_Library_add_cobjects,libreofficekitgtk,\
+    libreofficekit/source/gtk/lokdocview \
+))
+
+ifeq ($(OS),LINUX)
+$(eval $(call gb_Library_add_libs,libreofficekitgtk,\
+    -ldl \
+))
+endif
+
+# vim: set noet sw=4 ts=4:

libreofficekit/Module_libreofficekit.mk

@@ -12,6 +12,7 @@ $(eval $(call gb_Module_Module,libreofficekit))
 ifeq ($(OS),LINUX)
 $(eval $(call gb_Module_add_targets,libreofficekit,\
     StaticLibrary_libreofficekit \
+    Library_libreofficekitgtk \
 ))
 endif
 

libreofficekit/source/gtk/lokdocview.c

+/* -*- 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/.
+ */
+
+#include <sal/types.h>
+
+#define LOK_USE_UNSTABLE_API
+#include <LibreOfficeKit/LibreOfficeKit.h>
+
+#include <LibreOfficeKit/LibreOfficeKitGtk.h>
+
+static void lok_docview_class_init( LOKDocViewClass* pClass );
+static void lok_docview_init( LOKDocView* pDocView );
+
+SAL_DLLPUBLIC_EXPORT guint lok_docview_get_type()
+{
+    static guint lok_docview_type = 0;
+
+    if (!lok_docview_type)
+    {
+        GtkTypeInfo lok_docview_info =
+        {
+            "LokDocView",
+            sizeof( LOKDocView ),
+            sizeof( LOKDocViewClass ),
+            (GtkClassInitFunc) lok_docview_class_init,
+            (GtkObjectInitFunc) lok_docview_init,
+            NULL,
+            NULL,
+            (GtkClassInitFunc) NULL
+        };
+
+        lok_docview_type = gtk_type_unique( gtk_scrolled_window_get_type(), &lok_docview_info );
+    }
+    return lok_docview_type;
+}
+
+static void lok_docview_class_init( LOKDocViewClass* pClass )
+{
+    pClass->lok_docview = NULL;
+}
+
+static void lok_docview_init( LOKDocView* pDocView )
+{
+    pDocView->pEventBox = gtk_event_box_new();
+    gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(pDocView),
+                                           pDocView->pEventBox );
+
+    pDocView->pCanvas = gtk_image_new();
+    gtk_container_add( GTK_CONTAINER( pDocView->pEventBox ), pDocView->pCanvas );
+
+    gtk_widget_show( pDocView->pCanvas );
+    gtk_widget_show( pDocView->pEventBox );
+
+    pDocView->pPixBuf = 0;
+
+    // TODO: figure out a clever view of getting paths set up.
+    pDocView->pOffice = 0;
+    pDocView->pDocument = 0;
+}
+
+SAL_DLLPUBLIC_EXPORT GtkWidget* lok_docview_new( LibreOfficeKit* pOffice )
+{
+    LOKDocView* pDocView = gtk_type_new( lok_docview_get_type() );
+    pDocView->pOffice = pOffice;
+    return GTK_WIDGET( pDocView );
+}
+
+SAL_DLLPUBLIC_EXPORT gboolean lok_docview_open_document( LOKDocView* pDocView, char* pPath )
+{
+    if ( pDocView->pDocument )
+    {
+        pDocView->pDocument->pClass->destroy( pDocView->pDocument );
+        pDocView->pDocument = 0;
+    }
+
+    pDocView->pDocument = pDocView->pOffice->pClass->documentLoad( pDocView->pOffice,
+                                                           pPath );
+    if ( pDocView->pPixBuf )
+    {
+        g_object_unref( G_OBJECT( pDocView->pPixBuf ) );
+    }
+
+    long nWidth, nHeight;
+    pDocView->pDocument->pClass->getDocumentSize( pDocView->pDocument, &nWidth, &nHeight );
+
+    // Draw the whole document at once (for now)
+    int nRenderWidth = nWidth / 10;
+    int nRenderHeight = nHeight / 10;
+
+    pDocView->pPixBuf = gdk_pixbuf_new( GDK_COLORSPACE_RGB,
+                                        TRUE, 8,
+                                        nRenderWidth, nRenderHeight);
+
+
+    // TODO: move the rendering into it's own function etc.
+    unsigned char* pBuffer = gdk_pixbuf_get_pixels( pDocView->pPixBuf );
+    int nRowStride;
+    pDocView->pDocument->pClass->paintTile( pDocView->pDocument,
+                                            pBuffer,
+                                            nRenderWidth, nRenderHeight,
+                                            &nRowStride,
+                                            0, 0, // origin
+                                            nWidth, nHeight );
+    // TODO: double check that the rowstride really matches what we expected,
+    // although presumably we'd already be crashing by now if things were
+    // wrong.
+    (void) nRowStride;
+
+    gtk_image_set_from_pixbuf( GTK_IMAGE( pDocView->pCanvas ), pDocView->pPixBuf );
+
+    return FALSE;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */