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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /slideshow/source/inc/smilfunctionparser.hxx
parentInitial commit. (diff)
downloadlibreoffice-upstream.tar.xz
libreoffice-upstream.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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 <memory>
+
+
+/* Definition of SmilFunctionParser class */
+
+namespace slideshow
+{
+ namespace 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: */