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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "LuaDataSource.h"
#include <Rocket/Core/Lua/Interpreter.h>
#include <Rocket/Core/Log.h>
#include <Rocket/Core/String.h>
using Rocket::Core::Lua::Interpreter;
using Rocket::Core::Log;
using Rocket::Core::Lua::LuaType;
namespace Rocket {
namespace Controls {
namespace Lua {
LuaDataSource::LuaDataSource(const Rocket::Core::String& name) : DataSource(name), getRowRef(LUA_NOREF), getNumRowsRef(LUA_NOREF)
{
}
/// Fetches the contents of one row of a table within the data source.
/// @param[out] row The list of values in the table.
/// @param[in] table The name of the table to query.
/// @param[in] row_index The index of the desired row.
/// @param[in] columns The list of desired columns within the row.
void LuaDataSource::GetRow(Rocket::Core::StringList& row, const Rocket::Core::String& table, int row_index, const Rocket::Core::StringList& columns)
{
if(getRowRef == LUA_NOREF || getRowRef == LUA_REFNIL) return;
//setup the call
Interpreter::BeginCall(getRowRef);
lua_State* L = Interpreter::GetLuaState();
lua_pushstring(L,table.CString());
lua_pushinteger(L,row_index + 1);
lua_newtable(L);
int index = 1;
for(Rocket::Core::StringList::const_iterator itr = columns.begin(); itr != columns.end(); ++itr)
{
lua_pushstring(L,itr->CString());
lua_rawseti(L,-2,index++);
}
Interpreter::ExecuteCall(3,1); //3 parameters, 1 return. After here, the top of the stack contains the return value
int res = lua_gettop(L);
if(lua_type(L,res) == LUA_TTABLE)
{
lua_pushnil(L);
while(lua_next(L,res) != 0)
{
//key at -2, value at -1
row.push_back(luaL_checkstring(L,-1));
lua_pop(L,1); //pops value, leaves key for next iteration
}
lua_pop(L,1); //pop key
}
else
Log::Message(Log::LT_WARNING, "Lua: DataSource.GetRow must return a table, the function it called returned a %s", lua_typename(L,res));
Interpreter::EndCall(1);
}
/// Fetches the number of rows within one of this data source's tables.
/// @param[in] table The name of the table to query.
/// @return The number of rows within the specified table. Returns -1 in case of an incorrect Lua function.
int LuaDataSource::GetNumRows(const Rocket::Core::String& table)
{
if(getNumRowsRef == LUA_NOREF || getNumRowsRef == LUA_REFNIL) return -1;
lua_State* L = Interpreter::GetLuaState();
Interpreter::BeginCall(getNumRowsRef);
lua_pushstring(L,table.CString());
Interpreter::ExecuteCall(1,1); //1 parameter, 1 return. After this, the top of the stack contains the return value
int res = lua_gettop(L);
if(lua_type(L,res) == LUA_TNUMBER)
{
return luaL_checkinteger(L,res);
}
else
{
Log::Message(Log::LT_WARNING, "Lua: DataSource.GetNumRows must return an integer, the function it called returned a %s", lua_typename(L,res));
return -1;
}
}
}
}
}
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