source: trunk/src/gui/gui_style.cc @ 448

// Copyright (C) 2012-2015 ChaosForge Ltd
// http://chaosforge.org/
//
// This file is part of Nova libraries. 
// For conditions of distribution and use, see copying.txt file in root folder.

#include "nv/gui/gui_style.hh"

#include "nv/gui/gui_environment.hh"
#include <nv/lua/lua_raw.hh>

using namespace nv;
using namespace nv::gui;

void style::load_style( const string_view& filename )
{
        NV_ASSERT_ALWAYS( m_env, "Environment not set in style!" );
        m_lua.do_file( filename );
}

bool style::get( element* e, const string_view& centry, const string_view& cselector, string128& s )
{
        lua::stack_guard guard( m_lua );
        if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TSTRING ) ) return false;
        // TODO: create lua_tostringbuffer< size >
        s.assign( lua_tostring( m_lua, -1 ) );
        return true;
}

bool style::get( element* e, const string_view& centry, const string_view& cselector, vec4& vec )
{
        lua::stack_guard guard( m_lua );
        if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TTABLE ) ) return false;
        vec = vec4();
        for ( int i = 0; i < 4; ++i )
        {
                lua_rawgeti( m_lua, -1, i+1 );
                if ( lua_isnil( m_lua, -1 ) ) return true;
                vec[i] = static_cast< float >( lua_tonumber( m_lua, -1 ) );
                lua_pop( m_lua, 1 );
        }
        return true;
}

bool style::get( element* e, const string_view& centry, const string_view& cselector, int& i )
{
        lua::stack_guard guard( m_lua );
        if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TNUMBER ) ) return false;
        i = static_cast< int >( lua_tointeger( m_lua, -1 ) );
        return true;
}

bool style::get( element* e, const string_view& centry, const string_view& cselector, double& d )
{
        lua::stack_guard guard( m_lua );
        if ( !resolve( e->m_id, e->m_class, cselector, centry, LUA_TNUMBER ) ) return false;
        d = lua_tonumber( m_lua, -1 );
        return true;
}

style::~style()
{
}

bool style::find_entry( const string_view& cselector, const string_view& centry, int type )
{
        if ( lua_istable( m_lua, -1 ) )
        {
                if ( !cselector.empty() )
                {
                        lua_getfield( m_lua, -1, cselector.data() );
                        if ( lua_istable( m_lua, -1 ) )
                        {
                                lua_getfield( m_lua, -1, centry.data() );
                                if ( lua_type( m_lua, -1 ) == type ) 
                                {
                                        return true;
                                }
                                lua_pop( m_lua, 1 );
                        }
                        lua_pop( m_lua, 1 );
                }

                lua_getfield( m_lua, -1, centry.data() );
                if ( lua_type( m_lua, -1 ) == type ) return true;
        }
        return false;
}

bool style::resolve( shash64 cid, shash64 cclass, const string_view& cselector, const string_view& centry, int type )
{
        lua_getglobal( m_lua, "default" );
        int global = lua_gettop( m_lua );

        // check id
        string_view id( m_env->get_string( cid ) );
        if ( !id.empty() )
        {
                lua_getfield( m_lua, -1, id.data() );
                if ( find_entry( cselector, centry, type ) ) return true;
                lua_settop( m_lua, global );
        }
        // check class
        string_view klass( m_env->get_string( cclass ) );
        if ( !klass.empty() )
        {
                lua_getfield( m_lua, -1, klass.data() );
                if ( find_entry( cselector, centry, type ) ) return true;
                lua_settop( m_lua, global );
        }

        // check entry
        if ( find_entry( cselector, centry, type ) ) return true;
        return false;
}

void nv::gui::style::load_flags( element* e )
{
        lua::stack_guard guard( m_lua );
        lua_getglobal( m_lua, "default" );

        // check id
        string_view id( m_env->get_string( e->m_id ) );
        if ( !id.empty() )
        {
                lua_getfield( m_lua, -1, id.data() );
                add_flags( e );
                lua_pop( m_lua, -1 );
        }
        // check class
        string_view klass( m_env->get_string( e->m_class ) );
        if ( !klass.empty() )
        {
                lua_getfield( m_lua, -1, klass.data() );
                add_flags( e );
                lua_pop( m_lua, -1 );
        }
        add_flags( e );
}

void nv::gui::style::add_flags( element* e )
{
        if ( lua_istable( m_lua, -1 ) )
        {
                lua_getfield( m_lua, -1, "hover" );
                if ( lua_istable( m_lua, -1 ) )
                {
                        e->m_flags[DIRTY_HOVER] = true;
                }
                lua_pop( m_lua, 1 );

                lua_getfield( m_lua, -1, "selected" );
                if ( lua_istable( m_lua, -1 ) )
                {
                        e->m_flags[DIRTY_SELECT] = true;
                }
                lua_pop( m_lua, 1 );
        }
}