prop/binding/decoderoptions.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22
  23 #include "decoderoptions.h"
  24
  25 #include <boost/none_t.hpp>
  26
  27 #include <pv/data/decoderstack.h>
  28 #include <pv/data/decode/decoder.h>
  29 #include <pv/prop/double.h>
  30 #include <pv/prop/enum.h>
  31 #include <pv/prop/int.h>
  32 #include <pv/prop/string.h>
  33
  34 using boost::none;
  35 using std::make_pair;
  36 using std::map;
  37 using std::pair;
  38 using std::shared_ptr;
  39 using std::string;
  40 using std::vector;
  41
  42 namespace pv {
  43 namespace prop {
  44 namespace binding {
  45
  46 DecoderOptions::DecoderOptions(
  47         shared_ptr<pv::data::DecoderStack> decoder_stack,
  48         shared_ptr<data::decode::Decoder> decoder) :
  49         _decoder_stack(decoder_stack),
  50         _decoder(decoder)
  51 {
  52         assert(_decoder);
  53
  54         const srd_decoder *const dec = _decoder->decoder();
  55         assert(dec);
  56
  57         for (GSList *l = dec->options; l; l = l->next)
  58         {
  59                 const srd_decoder_option *const opt =
  60                         (srd_decoder_option*)l->data;
  61
  62                 const QString name = QString::fromUtf8(opt->desc);
  63
  64                 const Property::Getter get = [&, opt]() {
  65                         return getter(opt->id); };
  66                 const Property::Setter set = [&, opt](Glib::VariantBase value) {
  67                         setter(opt->id, value); };
  68
  69                 shared_ptr<Property> prop;
  70
  71                 if (opt->values)
  72                         prop = bind_enum(name, opt, get, set);
  73                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("d")))
  74                         prop = shared_ptr<Property>(new Double(name, 2, "",
  75                                 none, none, get, set));
  76                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("x")))
  77                         prop = shared_ptr<Property>(
  78                                 new Int(name, "", none, get, set));
  79                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("s")))
  80                         prop = shared_ptr<Property>(
  81                                 new String(name, get, set));
  82                 else
  83                         continue;
  84
  85                 _properties.push_back(prop);
  86         }
  87 }
  88
  89 shared_ptr<Property> DecoderOptions::bind_enum(
  90         const QString &name, const srd_decoder_option *option,
  91         Property::Getter getter, Property::Setter setter)
  92 {
  93         vector< pair<Glib::VariantBase, QString> > values;
  94         for (GSList *l = option->values; l; l = l->next) {
  95                 Glib::VariantBase var = Glib::VariantBase((GVariant*)l->data, true);
  96                 values.push_back(make_pair(var, print_gvariant(var)));
  97         }
  98
  99         return shared_ptr<Property>(new Enum(name, values, getter, setter));
 100 }
 101
 102 Glib::VariantBase DecoderOptions::getter(const char *id)
 103 {
 104         GVariant *val = NULL;
 105
 106         assert(_decoder);
 107
 108         // Get the value from the hash table if it is already present
 109         const map<string, GVariant*>& options = _decoder->options();
 110         const auto iter = options.find(id);
 111
 112         if (iter != options.end())
 113                 val = (*iter).second;
 114         else
 115         {
 116                 assert(_decoder->decoder());
 117
 118                 // Get the default value if not
 119                 for (GSList *l = _decoder->decoder()->options; l; l = l->next)
 120                 {
 121                         const srd_decoder_option *const opt =
 122                                 (srd_decoder_option*)l->data;
 123                         if (strcmp(opt->id, id) == 0) {
 124                                 val = opt->def;
 125                                 break;
 126                         }
 127                 }
 128         }
 129
 130         if (val)
 131                 return Glib::VariantBase(val, true);
 132         else
 133                 return Glib::VariantBase();
 134 }
 135
 136 void DecoderOptions::setter(const char *id, Glib::VariantBase value)
 137 {
 138         assert(_decoder);
 139         _decoder->set_option(id, value.gobj());
 140
 141         assert(_decoder_stack);
 142         _decoder_stack->begin_decode();
 143 }
 144
 145 } // binding
 146 } // prop
 147 } // pv