1+ /*
2+ * Copyright © Canonical Ltd.
3+ *
4+ * This program is free software: you can redistribute it and/or modify it
5+ * under the terms of the GNU Lesser General Public License version 2 or 3,
6+ * as published by the Free Software Foundation.
7+ *
8+ * This program is distributed in the hope that it will be useful,
9+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
10+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11+ * GNU Lesser General Public License for more details.
12+ *
13+ * You should have received a copy of the GNU Lesser General Public License
14+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
15+ */
16+
17+ #include " options_parsing_helpers.h"
18+ #include < stdexcept>
19+ #include < boost/throw_exception.hpp>
20+
21+ namespace mgc = mir::graphics::common;
22+ namespace geom = mir::geometry;
23+
24+ namespace
25+ {
26+ auto parse_scale (std::string const & str) -> float
27+ {
28+ try
29+ {
30+ size_t num_end = 0 ;
31+ float const value = std::stof (str, &num_end);
32+ if (num_end != str.size ())
33+ BOOST_THROW_EXCEPTION (std::runtime_error (" Scale \" " " \" is not a valid float"
34+ if (value <= 0.000001 )
35+ BOOST_THROW_EXCEPTION (std::runtime_error (" Scale must be greater than zero"
36+ return value;
37+ }
38+ catch (std::invalid_argument const &)
39+ {
40+ BOOST_THROW_EXCEPTION (std::runtime_error (" Scale \" " " \" is not a valid float"
41+ }
42+ catch (std::out_of_range const &)
43+ {
44+ BOOST_THROW_EXCEPTION (std::runtime_error (" Scale \" " " \" is out of range"
45+ }
46+ }
47+
48+ auto parse_size_dimension (std::string const & str) -> int
49+ {
50+ try
51+ {
52+ size_t num_end = 0 ;
53+ int const value = std::stoi (str, &num_end);
54+ if (num_end != str.size ())
55+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output dimension \" " " \" is not a valid number"
56+ if (value <= 0 )
57+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output dimensions must be greater than zero"
58+ return value;
59+ }
60+ catch (std::invalid_argument const &)
61+ {
62+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output dimension \" " " \" is not a valid number"
63+ }
64+ catch (std::out_of_range const &)
65+ {
66+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output dimension \" " " \" is out of range"
67+ }
68+ }
69+ }
70+
71+
72+ auto mgc::parse_size (std::string const & str) -> geom::Size
73+ {
74+ auto const x = str.find (' x' // "x" between width and height
75+ if (x == std::string::npos || x <= 0 || x >= str.size () - 1 )
76+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output size \" " " \" does not have two dimensions"
77+ return geom::Size {
78+ parse_size_dimension (str.substr (0 , x)),
79+ parse_size_dimension (str.substr (x + 1 ))};
80+ }
81+
82+ auto mgc::parse_size_with_scale (std::string const & str) -> std::tuple<mir::geometry::Size, float>
83+ {
84+ auto const x = str.find (' x' // "x" between width and height
85+ if (x == std::string::npos || x <= 0 || x >= str.size () - 1 )
86+ BOOST_THROW_EXCEPTION (std::runtime_error (" Output size \" " " \" does not have two dimensions"
87+ auto const scale_start = str.find (' ^' // start of output scale
88+ float scale = 1 .0f ;
89+ if (scale_start != std::string::npos)
90+ {
91+ if (scale_start >= str.size () - 1 )
92+ BOOST_THROW_EXCEPTION (std::runtime_error (" In \" " " \" , '^' is not followed by a scale"
93+ scale = parse_scale (str.substr (scale_start + 1 , std::string::npos));
94+ }
95+ return {geom::Size {
96+ parse_size_dimension (str.substr (0 , x)),
97+ parse_size_dimension (str.substr (x + 1 , scale_start - x - 1 ))},
98+ scale};
99+ }
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