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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : */
12 :
13 : #include "units.hxx"
14 : #include <basegfx/range/b2drange.hxx>
15 : #include "gfxtypes.hxx"
16 : #include <rtl/ustring.hxx>
17 : #include <boost/spirit/include/classic.hpp>
18 :
19 : namespace svgi
20 : {
21 :
22 0 : double convLength( double value, SvgUnit unit, const State& rState, char dir )
23 : {
24 : // convert svg unit to internal coordinates ("pixel"). Since the
25 : // OOo drawing layer is still largely integer-based, the initial
26 : // viewport transformation includes a certain scale factor
27 0 : double fRet(value);
28 0 : switch ( unit )
29 : {
30 0 : case SVG_LENGTH_UNIT_CM: fRet *= 72.0/2.54; break;
31 0 : case SVG_LENGTH_UNIT_IN: fRet *= 72.0; break;
32 0 : case SVG_LENGTH_UNIT_MM: fRet *= 72.0/25.4; break;
33 0 : case SVG_LENGTH_UNIT_PC: fRet *= 72.0/6.0; break;
34 : case SVG_LENGTH_UNIT_USER:
35 : case SVG_LENGTH_UNIT_PX: // no unit defaults to PX in svg,
36 : // assume display to have 72DPI
37 0 : case SVG_LENGTH_UNIT_PT: break;
38 0 : case SVG_LENGTH_UNIT_EM: fRet *= rState.mnFontSize; break;
39 0 : case SVG_LENGTH_UNIT_EX: fRet *= rState.mnFontSize / 2.0; break;
40 : case SVG_LENGTH_UNIT_PERCENTAGE:
41 : {
42 : double fBoxLen;
43 0 : if (rState.maViewBox.isEmpty())
44 : {
45 : basegfx::B2DRange aDefaultBox(0, 0,
46 : convLength(210, SVG_LENGTH_UNIT_MM, rState, 'h'),
47 0 : convLength(297, SVG_LENGTH_UNIT_MM, rState, 'v'));
48 : fBoxLen = (dir=='h' ? aDefaultBox.getWidth() :
49 : (dir=='v' ? aDefaultBox.getHeight() :
50 0 : aDefaultBox.getRange().getLength()));
51 : }
52 : else
53 : {
54 0 : fBoxLen = (dir=='h' ? rState.maViewBox.getWidth() :
55 0 : (dir=='v' ? rState.maViewBox.getHeight() :
56 0 : rState.maViewBox.getRange().getLength()));
57 : }
58 :
59 0 : fRet *= fBoxLen/100.0;
60 : }
61 0 : break;
62 0 : default: OSL_TRACE( "Unknown length type" ); break;
63 : }
64 :
65 0 : return fRet;
66 : }
67 :
68 0 : double convLength( const OUString& sValue, const State& rState, char dir )
69 : {
70 : //FIXME: convert deprecated spirit::classic to use spirit::qi
71 : using namespace ::boost::spirit::classic;
72 :
73 : OString aUTF8 = OUStringToOString( sValue,
74 0 : RTL_TEXTENCODING_UTF8 );
75 :
76 0 : double nVal=0.0;
77 0 : SvgUnit eUnit=SVG_LENGTH_UNIT_PX;
78 : const bool bRes = parse(aUTF8.getStr(),
79 : // Begin grammar
80 : (
81 0 : real_p[assign_a(nVal)]
82 0 : >> ( str_p("cm") [assign_a(eUnit,SVG_LENGTH_UNIT_CM)]
83 0 : | str_p("em") [assign_a(eUnit,SVG_LENGTH_UNIT_EM)]
84 0 : | str_p("ex") [assign_a(eUnit,SVG_LENGTH_UNIT_EX)]
85 0 : | str_p("in") [assign_a(eUnit,SVG_LENGTH_UNIT_IN)]
86 0 : | str_p("mm") [assign_a(eUnit,SVG_LENGTH_UNIT_MM)]
87 0 : | str_p("pc") [assign_a(eUnit,SVG_LENGTH_UNIT_PC)]
88 0 : | str_p("pt") [assign_a(eUnit,SVG_LENGTH_UNIT_PT)]
89 0 : | str_p("px") [assign_a(eUnit,SVG_LENGTH_UNIT_PX)]
90 0 : | str_p("%") [assign_a(eUnit,SVG_LENGTH_UNIT_PERCENTAGE)]
91 0 : | str_p("") [assign_a(eUnit,SVG_LENGTH_UNIT_USER)]
92 0 : | end_p)
93 : ),
94 : // End grammar
95 0 : space_p).full;
96 :
97 0 : if( !bRes )
98 0 : return 0.0;
99 :
100 0 : return convLength(nVal,eUnit,rState,dir);
101 : }
102 :
103 0 : } // namespace svgi
104 :
105 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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