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, 155 insertions, 0 deletions

diff --git a/slideshow/source/inc/smilfunctionparser.hxx b/slideshow/source/inc/smilfunctionparser.hxx
new file mode 100644
index 000000000..d2ef96abf
--- /dev/null
+++ b/slideshow/source/inc/smilfunctionparser.hxx
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+/* -*- 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_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
+
+#include "expressionnode.hxx"
+
+#include <basegfx/range/b2drectangle.hxx>
+#include <rtl/ustring.hxx>
+
+#include <memory>
+
+
+/* Definition of SmilFunctionParser class */
+
+namespace slideshow::internal
+    {
+        class SmilFunctionParser
+        {
+        public:
+            SmilFunctionParser() = delete;
+            SmilFunctionParser(const SmilFunctionParser&) = delete;
+            SmilFunctionParser& operator=(const SmilFunctionParser&) = delete;
+
+            /** Parse a string containing a SMIL value.
+
+                This method parses a string representing
+                a fixed value (i.e. a value that does not
+                change by time). Due to the dynamic view
+                capabilities of the presentation engine,
+                this value can sometimes only be determined
+                during runtime of the animation (because
+                e.g. mixed screen/view coordinates are
+                involved), and is thus still returned as an
+                ExpressionNode object. An example for
+                such a case is the "Width+1.0" string, which
+                contains the width of the shape in user
+                coordinate space, and the screen width
+                in device coordinate space.
+
+                The following grammar is accepted by this method:
+                <code>
+               identifier = 'pi'|'e'|'X'|'Y'|'Width'|'Height'
+
+               function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
+
+               basic_expression =
+                                number |
+                                identifier |
+                                function '(' additive_expression ')' |
+                                '(' additive_expression ')'
+
+               unary_expression =
+                                   '-' basic_expression |
+                                basic_expression
+
+               multiplicative_expression =
+                                   unary_expression ( ( '*' unary_expression )* |
+                                                   ( '/' unary_expression )* )
+
+               additive_expression =
+                                   multiplicative_expression ( ( '+' multiplicative_expression )* |
+                                                               ( '-' multiplicative_expression )* )
+
+                </code>
+
+                @param rSmilValue
+                The string to parse
+
+                @param rRelativeShapeBounds
+                The bounds of the shape this SMIL value is to be
+                evaluated for. The bounds must be <em>relative</em> to
+                the page the shape is part of, i.e. within the [0,1]
+                range. This is necessary, since the string might
+                contain symbolic references to the shape bounding box.
+
+                @throws ParseError if an invalid expression is given.
+
+                @return the generated function object.
+             */
+            static std::shared_ptr<ExpressionNode> const & parseSmilValue( const OUString&           rSmilValue,
+                                                           const ::basegfx::B2DRectangle&   rRelativeShapeBounds ); // throw ParseError
+
+            /** Parse a string containing a SMIL function.
+
+                This method parses a string representing
+                a possibly time-varying SMIL function.
+
+                The following grammar is accepted by this method:
+                <code>
+               identifier = 't'|'pi'|'e'|'X'|'Y'|'Width'|'Height'
+
+               function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log'
+
+               basic_expression =
+                                number |
+                                identifier |
+                                function '(' additive_expression ')' |
+                                '(' additive_expression ')'
+
+               unary_expression =
+                                   '-' basic_expression |
+                                basic_expression
+
+               multiplicative_expression =
+                                   unary_expression ( ( '*' unary_expression )* |
+                                                   ( '/' unary_expression )* )
+
+               additive_expression =
+                                   multiplicative_expression ( ( '+' multiplicative_expression )* |
+                                                               ( '-' multiplicative_expression )* )
+
+                </code>
+
+                @param rSmilFunction
+                The string to parse
+
+                @param rRelativeShapeBounds
+                The bounds of the shape this SMIL value is to be
+                evaluated for. The bounds must be <em>relative</em> to
+                the page the shape is part of, i.e. within the [0,1]
+                range. This is necessary, since the string might
+                contain symbolic references to the shape bounding box.
+
+                @throws ParseError if an invalid expression is given.
+
+                @return the generated function object.
+             */
+            static std::shared_ptr<ExpressionNode> const & parseSmilFunction( const OUString&            rSmilFunction,
+                                                              const ::basegfx::B2DRectangle&    rRelativeShapeBounds ); // throw ParseError
+
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SMILFUNCTIONPARSER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */