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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 :
10 : #include "units.hxx"
11 : #include <basegfx/range/b2drange.hxx>
12 : #include "gfxtypes.hxx"
13 : #include <rtl/ustring.hxx>
14 : #include <boost/spirit/include/classic.hpp>
15 :
16 : namespace svgi
17 : {
18 :
19 0 : double convLength( double value, SvgUnit unit, const State& rState, char dir )
20 : {
21 : // convert svg unit to internal coordinates ("pixel"). Since the
22 : // OOo drawing layer is still largely integer-based, the initial
23 : // viewport transformation includes a certain scale factor
24 0 : double fRet(value);
25 0 : switch ( unit )
26 : {
27 0 : case SVG_LENGTH_UNIT_CM: fRet *= 72.0/2.54; break;
28 0 : case SVG_LENGTH_UNIT_IN: fRet *= 72.0; break;
29 0 : case SVG_LENGTH_UNIT_MM: fRet *= 72.0/25.4; break;
30 0 : case SVG_LENGTH_UNIT_PC: fRet *= 72.0/6.0; break;
31 : case SVG_LENGTH_UNIT_USER:
32 : case SVG_LENGTH_UNIT_PX: // no unit defaults to PX in svg,
33 : // assume display to have 72DPI
34 0 : case SVG_LENGTH_UNIT_PT: break;
35 0 : case SVG_LENGTH_UNIT_EM: fRet *= rState.mnFontSize; break;
36 0 : case SVG_LENGTH_UNIT_EX: fRet *= rState.mnFontSize / 2.0; break;
37 : case SVG_LENGTH_UNIT_PERCENTAGE:
38 : {
39 : double fBoxLen;
40 0 : if (rState.maViewBox.isEmpty())
41 : {
42 : basegfx::B2DRange aDefaultBox(0, 0,
43 : convLength(210, SVG_LENGTH_UNIT_MM, rState, 'h'),
44 0 : convLength(297, SVG_LENGTH_UNIT_MM, rState, 'v'));
45 : fBoxLen = (dir=='h' ? aDefaultBox.getWidth() :
46 : (dir=='v' ? aDefaultBox.getHeight() :
47 0 : aDefaultBox.getRange().getLength()));
48 : }
49 : else
50 : {
51 0 : fBoxLen = (dir=='h' ? rState.maViewBox.getWidth() :
52 0 : (dir=='v' ? rState.maViewBox.getHeight() :
53 0 : rState.maViewBox.getRange().getLength()));
54 : }
55 :
56 0 : fRet *= fBoxLen/100.0;
57 : }
58 0 : break;
59 0 : default: OSL_TRACE( "Unknown length type" ); break;
60 : }
61 :
62 0 : return fRet;
63 : }
64 :
65 0 : double convLength( const OUString& sValue, const State& rState, char dir )
66 : {
67 : //FIXME: convert deprecated spirit::classic to use spirit::qi
68 : using namespace ::boost::spirit::classic;
69 :
70 : OString aUTF8 = OUStringToOString( sValue,
71 0 : RTL_TEXTENCODING_UTF8 );
72 :
73 0 : double nVal=0.0;
74 0 : SvgUnit eUnit=SVG_LENGTH_UNIT_PX;
75 : const bool bRes = parse(aUTF8.getStr(),
76 : // Begin grammar
77 : (
78 0 : real_p[assign_a(nVal)]
79 0 : >> ( str_p("cm") [assign_a(eUnit,SVG_LENGTH_UNIT_CM)]
80 0 : | str_p("em") [assign_a(eUnit,SVG_LENGTH_UNIT_EM)]
81 0 : | str_p("ex") [assign_a(eUnit,SVG_LENGTH_UNIT_EX)]
82 0 : | str_p("in") [assign_a(eUnit,SVG_LENGTH_UNIT_IN)]
83 0 : | str_p("mm") [assign_a(eUnit,SVG_LENGTH_UNIT_MM)]
84 0 : | str_p("pc") [assign_a(eUnit,SVG_LENGTH_UNIT_PC)]
85 0 : | str_p("pt") [assign_a(eUnit,SVG_LENGTH_UNIT_PT)]
86 0 : | str_p("px") [assign_a(eUnit,SVG_LENGTH_UNIT_PX)]
87 0 : | str_p("%") [assign_a(eUnit,SVG_LENGTH_UNIT_PERCENTAGE)]
88 0 : | str_p("") [assign_a(eUnit,SVG_LENGTH_UNIT_USER)]
89 0 : | end_p)
90 : ),
91 : // End grammar
92 0 : space_p).full;
93 :
94 0 : if( !bRes )
95 0 : return 0.0;
96 :
97 0 : return convLength(nVal,eUnit,rState,dir);
98 : }
99 :
100 0 : } // namespace svgi
101 :
102 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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