LV2FeaturesListBase Class Reference

#include <LV2FeaturesList.h>

Inheritance diagram for LV2FeaturesListBase:

Public Types
using	FeaturePointers = std::vector< const LV2_Feature * >
	Get vector of pointers to features, whose .data() can be passed to lv2. More...

Public Member Functions
	LV2FeaturesListBase (const LilvPlugin &plug)
virtual	~LV2FeaturesListBase ()
	LV2FeaturesListBase (const LV2FeaturesListBase &)=delete
LV2FeaturesListBase &	operator= (const LV2FeaturesListBase &)=delete
virtual FeaturePointers	GetFeaturePointers () const =0
bool	ValidateFeatures (const LilvNode *subject)
bool	CheckFeatures (const LilvNode *subject, bool required)

Public Attributes
const LilvPlugin &	mPlug
bool	mNoResize { false }

Detailed Description

Abstraction of a list of features, with a check for satisfaction of requirements of a given lv2 "subject"

Definition at line 33 of file LV2FeaturesList.h.

Member Typedef Documentation

FeaturePointers

using LV2FeaturesListBase::FeaturePointers = std::vector<const LV2_Feature *>

Get vector of pointers to features, whose .data() can be passed to lv2.

Definition at line 42 of file LV2FeaturesList.h.

Constructor & Destructor Documentation

LV2FeaturesListBase() [1/2]

LV2FeaturesListBase::LV2FeaturesListBase ( const LilvPlugin &  plug )

explicit

Definition at line 67 of file LV2FeaturesList.cpp.

                                                               : mPlug{ plug }
{
}

~LV2FeaturesListBase()

LV2FeaturesListBase::~LV2FeaturesListBase ( )

virtualdefault

LV2FeaturesListBase() [2/2]

LV2FeaturesListBase::LV2FeaturesListBase ( const LV2FeaturesListBase &  )

delete

Member Function Documentation

CheckFeatures()

bool LV2FeaturesListBase::CheckFeatures	(	const LilvNode *	subject,
		bool	required
	)

Parameters

subject	URI of the host or of the UI identifies a resource in lv2
required	whether to check required or optional features of subject

Returns

true only if !required or else all required features are supported

Definition at line 133 of file LV2FeaturesList.cpp.

{
   using namespace LV2Symbols;
   bool supported = true;
   auto predicate = required ? node_RequiredFeature : node_OptionalFeature;
   if (LilvNodesPtr nodes{
      lilv_world_find_nodes(gWorld, subject, predicate, nullptr) }
   ){
      LILV_FOREACH(nodes, i, nodes.get()) {
         const auto node = lilv_nodes_get(nodes.get(), i);
         const auto uri = lilv_node_as_string(node);
         if ((strcmp(uri, LV2_UI__noUserResize) == 0) ||
             (strcmp(uri, LV2_UI__fixedSize) == 0))
            mNoResize = true;
         else if (strcmp(uri, LV2_WORKER__schedule) == 0) {
            /* Supported but handled in LV2Wrapper */
         }
         else if (required) {
            auto features = GetFeaturePointers();
            const auto end = features.end();
            supported = (end != std::find_if(features.begin(), end,
               [&](auto &pFeature){ return pFeature &&
                  strcmp(pFeature->URI, uri) == 0; }));
            if (!supported) {
               wxLogError(wxT("%s requires unsupported feature %s"),
                  lilv_node_as_string(lilv_plugin_get_uri(&mPlug)), uri);
               break;
            }
         }
      }
   }
   return supported;
}

References details::end(), GetFeaturePointers(), LV2Symbols::gWorld, mNoResize, mPlug, and wxT().

Referenced by ValidateFeatures().

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GetFeaturePointers()

virtual FeaturePointers LV2FeaturesListBase::GetFeaturePointers ( ) const

pure virtual

Implemented in ExtendedLV2FeaturesList, and LV2FeaturesList.

Referenced by CheckFeatures(), and ExtendedLV2FeaturesList::GetFeaturePointers().

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operator=()

LV2FeaturesListBase & LV2FeaturesListBase::operator= ( const LV2FeaturesListBase &  )

delete

ValidateFeatures()

bool LV2FeaturesListBase::ValidateFeatures

(

const LilvNode *

subject

)

Parameters

subject

URI of the host or of the UI identifies a resource in lv2

Returns

whether all required features of subject are supported

Definition at line 128 of file LV2FeaturesList.cpp.

{
   return CheckFeatures(subject, true) && CheckFeatures(subject, false);
}

References CheckFeatures().

Referenced by LV2UIFeaturesList::InitializeFeatures().

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Member Data Documentation

mNoResize

bool LV2FeaturesListBase::mNoResize { false }

Definition at line 59 of file LV2FeaturesList.h.

Referenced by CheckFeatures(), and LV2Effect::ShowClientInterface().

mPlug

const LilvPlugin& LV2FeaturesListBase::mPlug

Definition at line 58 of file LV2FeaturesList.h.

Referenced by CheckFeatures(), LV2InstanceFeaturesList::CheckOptions(), LV2Wrapper::Create(), LV2InstanceFeaturesList::InitializeOptions(), and LV2FeaturesList::LogVPrintf().

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The documentation for this class was generated from the following files:

• LV2FeaturesList.h
• LV2FeaturesList.cpp