| 1 | // Copyright (C) 2012-2015 ChaosForge Ltd
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| 2 | // http://chaosforge.org/
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| 3 | //
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| 4 | // This file is part of Nova libraries.
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| 5 | // For conditions of distribution and use, see copying.txt file in root folder.
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| 6 |
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| 7 | #include "nv/gui/gui_style.hh"
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| 8 |
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| 9 | #include "nv/gui/gui_environment.hh"
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| 10 | #include <nv/lua/lua_raw.hh>
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| 11 |
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| 12 | using namespace nv;
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| 13 | using namespace nv::gui;
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| 14 |
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| 15 | void style::load_style( const string_view& filename )
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| 16 | {
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| 17 | NV_ASSERT_ALWAYS( m_env, "Environment not set in style!" );
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| 18 | m_lua.do_file( filename );
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| 19 | }
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| 20 |
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| 21 | bool style::get( element* e, const string_view& centry, const string_view& cselector, string128& s )
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| 22 | {
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| 23 | lua::stack_guard guard( m_lua );
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| 24 | if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TSTRING ) ) return false;
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| 25 | // TODO: create lua_tostringbuffer< size >
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| 26 | s.assign( lua_tostring( m_lua, -1 ) );
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| 27 | return true;
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| 28 | }
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| 29 |
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| 30 | bool style::get( element* e, const string_view& centry, const string_view& cselector, vec4& vec )
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| 31 | {
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| 32 | lua::stack_guard guard( m_lua );
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| 33 | if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TTABLE ) ) return false;
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| 34 | vec = vec4();
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| 35 | for ( int i = 0; i < 4; ++i )
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| 36 | {
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| 37 | lua_rawgeti( m_lua, -1, i+1 );
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| 38 | if ( lua_isnil( m_lua, -1 ) ) return true;
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| 39 | vec[i] = static_cast< float >( lua_tonumber( m_lua, -1 ) );
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| 40 | lua_pop( m_lua, 1 );
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| 41 | }
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| 42 | return true;
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| 43 | }
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| 44 |
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| 45 | bool style::get( element* e, const string_view& centry, const string_view& cselector, int& i )
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| 46 | {
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| 47 | lua::stack_guard guard( m_lua );
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| 48 | if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TNUMBER ) ) return false;
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| 49 | i = static_cast< int >( lua_tointeger( m_lua, -1 ) );
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| 50 | return true;
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| 51 | }
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| 52 |
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| 53 | bool style::get( element* e, const string_view& centry, const string_view& cselector, double& d )
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| 54 | {
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| 55 | lua::stack_guard guard( m_lua );
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| 56 | if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TNUMBER ) ) return false;
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| 57 | d = lua_tonumber( m_lua, -1 );
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| 58 | return true;
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| 59 | }
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| 60 |
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| 61 | style::~style()
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| 62 | {
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| 63 | }
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| 64 |
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| 65 | bool style::find_entry( const string_view& cselector, const string_view& centry, int type )
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| 66 | {
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| 67 | if ( lua_istable( m_lua, -1 ) )
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| 68 | {
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| 69 | if ( !cselector.empty() )
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| 70 | {
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| 71 | lua_getfield( m_lua, -1, cselector.data() );
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| 72 | if ( lua_istable( m_lua, -1 ) )
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| 73 | {
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| 74 | lua_getfield( m_lua, -1, centry.data() );
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| 75 | if ( lua_type( m_lua, -1 ) == type )
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| 76 | {
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| 77 | return true;
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| 78 | }
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| 79 | lua_pop( m_lua, 1 );
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| 80 | }
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| 81 | lua_pop( m_lua, 1 );
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| 82 | }
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| 83 |
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| 84 | lua_getfield( m_lua, -1, centry.data() );
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| 85 | if ( lua_type( m_lua, -1 ) == type ) return true;
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| 86 | }
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| 87 | return false;
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| 88 | }
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| 89 |
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| 90 | bool style::resolve( shash64 cid, shash64 cclass, const string_view& cselector, const string_view& centry, int type )
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| 91 | {
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| 92 | lua_getglobal( m_lua, "default" );
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| 93 | int global = lua_gettop( m_lua );
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| 94 |
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| 95 | // check id
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| 96 | string_view id( m_env->get_string( cid ) );
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| 97 | if ( !id.empty() )
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| 98 | {
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| 99 | lua_getfield( m_lua, -1, id.data() );
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| 100 | if ( find_entry( cselector, centry, type ) ) return true;
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| 101 | lua_settop( m_lua, global );
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| 102 | }
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| 103 | // check class
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| 104 | string_view klass( m_env->get_string( cclass ) );
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| 105 | if ( !klass.empty() )
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| 106 | {
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| 107 | lua_getfield( m_lua, -1, klass.data() );
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| 108 | if ( find_entry( cselector, centry, type ) ) return true;
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| 109 | lua_settop( m_lua, global );
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| 110 | }
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| 111 |
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| 112 | // check entry
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| 113 | if ( find_entry( cselector, centry, type ) ) return true;
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| 114 | return false;
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| 115 | }
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