RmlUi/Source/Lua/Element.cpp

/*
 * This source file is part of RmlUi, the HTML/CSS Interface Middleware
 *
 * For the latest information, see http://github.com/mikke89/RmlUi
 *
 * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
 * Copyright (c) 2019 The RmlUi Team, and contributors
 *
 * 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 "Element.h"
#include "ElementStyleProxy.h"
#include "LuaEventListener.h"
#include "ElementAttributesProxy.h"
#include "ElementChildNodesProxy.h"
#include <RmlUi/Lua/Utilities.h>


namespace Rml {
namespace Lua {
typedef ElementDocument Document;

template<> void ExtraInit<Element>(lua_State* L, int metatable_index)
{
    int top = lua_gettop(L);
    //guarantee the "Element.As" table exists
    lua_getfield(L,metatable_index-1,"As");
    if(lua_isnoneornil(L,-1)) //if it doesn't exist, create it
    {
        lua_newtable(L);    
        lua_setfield(L,metatable_index-1,"As");
    }
    lua_pop(L,1); //pop the result of lua_getfield
    lua_pushcfunction(L,Elementnew);
    lua_setfield(L,metatable_index-1,"new");
    lua_settop(L,top);
}

int Elementnew(lua_State* L)
{
    const char* tag = luaL_checkstring(L,1);
    Element* ele = new Element(tag);
    LuaType<Element>::push(L,ele,true);
    return 1;
}

//methods
int ElementAddEventListener(lua_State* L, Element* obj)
{
    int top = lua_gettop(L);
    bool capture = false;
    //default false if they didn't pass it in
    if (top > 2)
		capture = RMLUI_CHECK_BOOL(L,3);

    const char* event = luaL_checkstring(L,1);

    LuaEventListener* listener = nullptr;
    int type = lua_type(L,2);
    if(type == LUA_TFUNCTION)
    {
        listener = new LuaEventListener(L,2,obj);
    }
    else if(type == LUA_TSTRING)
    {
        const char* code = luaL_checkstring(L,2);
        listener = new LuaEventListener(code,obj);
    }
	else
	{
		Log::Message(Log::LT_WARNING, "Lua Context:AddEventLisener's 2nd argument can only be a Lua function or a string, you passed in a %s", lua_typename(L,type));
	}

    if(listener != nullptr)
    {
        obj->AddEventListener(event,listener,capture);
    }
    return 0;
}

int ElementAppendChild(lua_State* L, Element* obj)
{
	ElementPtr* element = LuaType<ElementPtr>::check(L, 1);
	if (*element)
		obj->AppendChild(std::move(*element));
	else
		Log::Message(Log::LT_WARNING, "Could not append child to element '%s', as the child was null. Was it already moved from?", obj->GetAddress().c_str());
    return 0;
}

int ElementBlur(lua_State* /*L*/, Element* obj)
{
    obj->Blur();
    return 0;
}

int ElementClick(lua_State* /*L*/, Element* obj)
{
    obj->Click();
    return 0;
}

int ElementDispatchEvent(lua_State* L, Element* obj)
{
    const char* event = luaL_checkstring(L,1);
    Dictionary params;
    lua_pushnil(L); //becauase lua_next pops a key from the stack first, we don't want to pop the table
    while(lua_next(L,2) != 0)
    {
        //[-1] is value, [-2] is key
        int type = lua_type(L,-1);
        const char* key = luaL_checkstring(L,-2); //key HAS to be a string, or things will go bad
        switch(type)
        {
		case LUA_TNUMBER:
            params[key] = (float)lua_tonumber(L,-1);
            break;
		case LUA_TBOOLEAN: 
            params[key] = RMLUI_CHECK_BOOL(L,-1);
            break;
		case LUA_TSTRING:
            params[key] = luaL_checkstring(L,-1);
            break;
        case LUA_TUSERDATA:
        case LUA_TLIGHTUSERDATA:
            params[key] = lua_touserdata(L,-1);
            break;
        default:
            break;
        }
    }
    obj->DispatchEvent(event, params);
    return 0;
}

int ElementFocus(lua_State* /*L*/, Element* obj)
{
    obj->Focus();
    return 0;
}

int ElementGetAttribute(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    Variant* var = obj->GetAttribute(name);
    PushVariant(L,var);
    return 1;
}

int ElementGetElementById(lua_State* L, Element* obj)
{
    const char* id = luaL_checkstring(L,1);
    Element* ele = obj->GetElementById(id);
    LuaType<Element>::push(L,ele,false);
    return 1;
}

int ElementGetElementsByTagName(lua_State* L, Element* obj)
{
    const char* tag = luaL_checkstring(L,1);
    ElementList list;
    obj->GetElementsByTagName(list,tag);
    lua_newtable(L);
    for(unsigned int i = 0; i < list.size(); i++)
    {
        lua_pushinteger(L,i);
        LuaType<Element>::push(L,list[i],false);
        lua_settable(L,-3); //-3 is the table
    }
    return 1;
}

int ElementHasAttribute(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    lua_pushboolean(L,obj->HasAttribute(name));
    return 1;
}

int ElementHasChildNodes(lua_State* L, Element* obj)
{
    lua_pushboolean(L,obj->HasChildNodes());
    return 1;
}

int ElementInsertBefore(lua_State* L, Element* obj)
{
    ElementPtr* element = LuaType<ElementPtr>::check(L,1);
    Element* adjacent = LuaType<Element>::check(L,2);
	if(*element)
		obj->InsertBefore(std::move(*element), adjacent);
	else
		Log::Message(Log::LT_WARNING, "Could not insert child to element '%s', as the child was null. Was it already moved from?", obj->GetAddress().c_str());
    return 0;
}

int ElementIsClassSet(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    lua_pushboolean(L,obj->IsClassSet(name));
    return 1;
}

int ElementRemoveAttribute(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    obj->RemoveAttribute(name);
    return 0;
}

int ElementRemoveChild(lua_State* L, Element* obj)
{
    Element* element = LuaType<Element>::check(L,1);
    lua_pushboolean(L,static_cast<bool>(obj->RemoveChild(element)));
    return 1;
}

int ElementReplaceChild(lua_State* L, Element* obj)
{
    ElementPtr* inserted = LuaType<ElementPtr>::check(L,1);
    Element* replaced = LuaType<Element>::check(L,2);
	if(*inserted)
		lua_pushboolean(L, static_cast<bool>(obj->ReplaceChild(std::move(*inserted),replaced)));
	else
		Log::Message(Log::LT_WARNING, "Could not replace child in element '%s', as the child was null. Was it already moved from?", obj->GetAddress().c_str());
    return 1;
}

int ElementScrollIntoView(lua_State* L, Element* obj)
{
    bool align = RMLUI_CHECK_BOOL(L,1);
    obj->ScrollIntoView(align);
    return 0;
}

int ElementSetAttribute(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    const char* value = luaL_checkstring(L,2);
    obj->SetAttribute(name,String(value));
    return 0;
}

int ElementSetClass(lua_State* L, Element* obj)
{
    const char* name = luaL_checkstring(L,1);
    bool value = RMLUI_CHECK_BOOL(L,2);
    obj->SetClass(name,value);
    return 0;
}

//getters
int ElementGetAttrattributes(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    ElementAttributesProxy* proxy = new ElementAttributesProxy();
    proxy->owner = ele;
    LuaType<ElementAttributesProxy>::push(L,proxy,true);    
    return 1;
}

int ElementGetAttrchild_nodes(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    ElementChildNodesProxy* ecnp = new ElementChildNodesProxy();
    ecnp->owner = ele;
    LuaType<ElementChildNodesProxy>::push(L,ecnp,true);
    return 1;
}

int ElementGetAttrclass_name(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    String classnames = ele->GetClassNames();
    lua_pushstring(L,classnames.c_str());
    return 1;
}

int ElementGetAttrclient_left(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetClientLeft());
    return 1;
}

int ElementGetAttrclient_height(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetClientHeight());
    return 1;
}

int ElementGetAttrclient_top(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetClientTop());
    return 1;
}

int ElementGetAttrclient_width(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetClientWidth());
    return 1;
}

int ElementGetAttrfirst_child(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* child = ele->GetFirstChild();
    if(child == nullptr)
        lua_pushnil(L);
    else
        LuaType<Element>::push(L,child,false);
    return 1;
}

int ElementGetAttrid(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushstring(L,ele->GetId().c_str());
    return 1;
}

int ElementGetAttrinner_rml(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushstring(L,ele->GetInnerRML().c_str());
    return 1;
}

int ElementGetAttrlast_child(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* child = ele->GetLastChild();
    if(child == nullptr)
        lua_pushnil(L);
    else
        LuaType<Element>::push(L,child,false);
    return 1;
}

int ElementGetAttrnext_sibling(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* sibling = ele->GetNextSibling();
    if(sibling == nullptr)
        lua_pushnil(L);
    else
        LuaType<Element>::push(L,sibling,false);
    return 1;
}

int ElementGetAttroffset_height(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetOffsetHeight());
    return 1;
}

int ElementGetAttroffset_left(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetOffsetLeft());
    return 1;
}

int ElementGetAttroffset_parent(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* parent = ele->GetOffsetParent();
    LuaType<Element>::push(L,parent,false);
    return 1;
}

int ElementGetAttroffset_top(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L, ele->GetOffsetTop());
    return 1;
}

int ElementGetAttroffset_width(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetOffsetWidth());
    return 1;
}

int ElementGetAttrowner_document(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Document* doc = ele->GetOwnerDocument();
    LuaType<Document>::push(L,doc,false);
    return 1;
}

int ElementGetAttrparent_node(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* parent = ele->GetParentNode();
    if(parent == nullptr)
        lua_pushnil(L);
    else
        LuaType<Element>::push(L,parent,false);
    return 1;
}

int ElementGetAttrprevious_sibling(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    Element* sibling = ele->GetPreviousSibling();
    if(sibling == nullptr)
        lua_pushnil(L);
    else
        LuaType<Element>::push(L,sibling,false);
    return 1;
}

int ElementGetAttrscroll_height(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetScrollHeight());
    return 1;
}

int ElementGetAttrscroll_left(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetScrollLeft());
    return 1;
}

int ElementGetAttrscroll_top(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetScrollTop());
    return 1;
}

int ElementGetAttrscroll_width(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushnumber(L,ele->GetScrollWidth());
    return 1;
}

int ElementGetAttrstyle(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    ElementStyleProxy* prox = new ElementStyleProxy();
    prox->owner = ele;
    LuaType<ElementStyleProxy>::push(L,prox,true);
    return 1;
}

int ElementGetAttrtag_name(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    lua_pushstring(L,ele->GetTagName().c_str());
    return 1;
}


//setters
int ElementSetAttrclass_name(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    const char* name = luaL_checkstring(L,2);
    ele->SetClassNames(name);
    return 0;
}

int ElementSetAttrid(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    const char* id = luaL_checkstring(L,2);
    ele->SetId(id);
    return 0;
}

int ElementSetAttrinner_rml(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    const char* rml = luaL_checkstring(L,2);
    ele->SetInnerRML(rml);
    return 0;
}

int ElementSetAttrscroll_left(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    float scroll = (float)luaL_checknumber(L,2);
    ele->SetScrollLeft(scroll);
    return 0;
}

int ElementSetAttrscroll_top(lua_State* L)
{
    Element* ele = LuaType<Element>::check(L,1);
    RMLUI_CHECK_OBJ(ele);
    float scroll = (float)luaL_checknumber(L,2);
    ele->SetScrollTop(scroll);
    return 0;
}


RegType<Element> ElementMethods[] =
{
    RMLUI_LUAMETHOD(Element,AddEventListener)
    RMLUI_LUAMETHOD(Element,AppendChild)
    RMLUI_LUAMETHOD(Element,Blur)
    RMLUI_LUAMETHOD(Element,Click)
    RMLUI_LUAMETHOD(Element,DispatchEvent)
    RMLUI_LUAMETHOD(Element,Focus)
    RMLUI_LUAMETHOD(Element,GetAttribute)
    RMLUI_LUAMETHOD(Element,GetElementById)
    RMLUI_LUAMETHOD(Element,GetElementsByTagName)
    RMLUI_LUAMETHOD(Element,HasAttribute)
    RMLUI_LUAMETHOD(Element,HasChildNodes)
    RMLUI_LUAMETHOD(Element,InsertBefore)
    RMLUI_LUAMETHOD(Element,IsClassSet)
    RMLUI_LUAMETHOD(Element,RemoveAttribute)
    RMLUI_LUAMETHOD(Element,RemoveChild)
    RMLUI_LUAMETHOD(Element,ReplaceChild)
    RMLUI_LUAMETHOD(Element,ScrollIntoView)
    RMLUI_LUAMETHOD(Element,SetAttribute)
    RMLUI_LUAMETHOD(Element,SetClass)
    { nullptr, nullptr },
};

luaL_Reg ElementGetters[] =
{
    RMLUI_LUAGETTER(Element,attributes)
    RMLUI_LUAGETTER(Element,child_nodes)
    RMLUI_LUAGETTER(Element,class_name)
    RMLUI_LUAGETTER(Element,client_left)
    RMLUI_LUAGETTER(Element,client_height)
    RMLUI_LUAGETTER(Element,client_top)
    RMLUI_LUAGETTER(Element,client_width)
    RMLUI_LUAGETTER(Element,first_child)
    RMLUI_LUAGETTER(Element,id)
    RMLUI_LUAGETTER(Element,inner_rml)
    RMLUI_LUAGETTER(Element,last_child)
    RMLUI_LUAGETTER(Element,next_sibling)
    RMLUI_LUAGETTER(Element,offset_height)
    RMLUI_LUAGETTER(Element,offset_left)
    RMLUI_LUAGETTER(Element,offset_parent)
    RMLUI_LUAGETTER(Element,offset_top)
    RMLUI_LUAGETTER(Element,offset_width)
    RMLUI_LUAGETTER(Element,owner_document)
    RMLUI_LUAGETTER(Element,parent_node)
    RMLUI_LUAGETTER(Element,previous_sibling)
    RMLUI_LUAGETTER(Element,scroll_height)
    RMLUI_LUAGETTER(Element,scroll_left)
    RMLUI_LUAGETTER(Element,scroll_top)
    RMLUI_LUAGETTER(Element,scroll_width)
    RMLUI_LUAGETTER(Element,style)
    RMLUI_LUAGETTER(Element,tag_name)
    { nullptr, nullptr },
};

luaL_Reg ElementSetters[] =
{
    RMLUI_LUASETTER(Element,class_name)
    RMLUI_LUASETTER(Element,id)
    RMLUI_LUASETTER(Element,inner_rml)
    RMLUI_LUASETTER(Element,scroll_left)
    RMLUI_LUASETTER(Element,scroll_top)
    { nullptr, nullptr },
};

RMLUI_LUATYPE_DEFINE(Element)


template<> void ExtraInit<ElementPtr>(lua_State* /*L*/, int /*metatable_index*/)
{
	return;
}

RegType<ElementPtr> ElementPtrMethods[] =
{
	{ nullptr, nullptr },
};

luaL_Reg ElementPtrGetters[] =
{
	{ nullptr, nullptr },
};

luaL_Reg ElementPtrSetters[] =
{
	{ nullptr, nullptr },
};

RMLUI_LUATYPE_DEFINE(ElementPtr)


} // namespace Lua
} // namespace Rml