ui_node_special.cpp

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "../../cl_shared.h"
#include "../ui_nodes.h"
#include "../ui_parse.h"
#include "../ui_actions.h"
#include "../ui_behaviour.h"
#include "../ui_lua.h"
#include "ui_node_window.h"
#include "ui_node_special.h"
#include "ui_node_abstractnode.h"
 
#include "../../../common/scripts_lua.h"

void uiFuncNode::onLoaded (uiNode_t* node)
{
    const value_t* prop = UI_GetPropertyFromBehaviour(node->parent->behaviour, node->name);
    if (prop && prop->type == V_UI_ACTION) {
        uiAction_t*& value = Com_GetValue<uiAction_t*>(node->parent, prop);
        if (value != nullptr && node->super == nullptr) {
            Com_Printf("UI_FuncNodeLoaded: '%s' already defined. Previous function ignored (\"%s\")\n", prop->string, UI_GetPath(node));
        }
        value = node->onClick;
    }
}
 
void UI_RegisterFuncNode (uiBehaviour_t* behaviour)
{
    behaviour->name = "func";
    behaviour->isVirtual = true;
    behaviour->isFunction = true;
    behaviour->manager = UINodePtr(new uiFuncNode());
    behaviour->lua_SWIG_typeinfo = UI_SWIG_TypeQuery("uiFuncNode_t *");
}
 
void UI_RegisterNullNode (uiBehaviour_t* behaviour)
{
    behaviour->name = "";
    behaviour->isVirtual = true;
    behaviour->lua_SWIG_typeinfo = UI_SWIG_TypeQuery("uiNullNode_t *");
}

static void UI_ConfuncCommand_f (void)
{
    uiNode_t* node = static_cast<uiNode_t*>(Cmd_Userdata());
    assert(node);
    assert(UI_NodeInstanceOf(node, "confunc"));
    if (node->onClick != nullptr) {
        UI_ExecuteConFuncActions(node, node->onClick);
    }
    if (node->lua_onClick != LUA_NOREF) {
        UI_ExecuteLuaConFunc (node, node->lua_onClick);
    }
}

static bool UI_ConFuncIsVirtual (const uiNode_t* const node)
{
    /* magic way to know if it is a dummy node (used for inherited confunc) */
    const uiNode_t* dummy = static_cast<const uiNode_t*>(Cmd_GetUserdata(node->name));
    assert(node);
    assert(UI_NodeInstanceOf(node, "confunc"));
    return (dummy != nullptr && dummy->parent == nullptr);
}

void uiConFuncNode::onLoaded (uiNode_t* node)
{
    /* register confunc non inherited */
    if (node->super == nullptr) {
        /* don't add a callback twice */
        if (!Cmd_Exists(node->name)) {
            Cmd_AddCommand(node->name, UI_ConfuncCommand_f, "Confunc callback");
            Cmd_AddUserdata(node->name, node);
        } else {
            Com_Printf("UI_ParseNodeBody: Command name for confunc '%s' already registered\n", UI_GetPath(node));
        }
    } else {
        /* convert a confunc to an "inherited" confunc if it is possible */
        if (Cmd_Exists(node->name)) {
            if (UI_ConFuncIsVirtual(node))
                return;
        }
 
        uiNode_t* dummy = UI_AllocNode(node->name, "confunc", false);
        Cmd_AddCommand(node->name, UI_ConfuncCommand_f, "Inherited confunc callback");
        Cmd_AddUserdata(dummy->name, dummy);
    }
}
 
void uiConFuncNode::clone (const uiNode_t* source, uiNode_t* clone)
{
    uiNode::clone(source, clone);
    onLoaded(clone);
}

void uiConFuncNode::deleteNode (uiNode_t* node)
{
    onWindowClosed(node);
    if (Cmd_Exists(node->name)) {
        uiNode_t* userData = (uiNode_t*)Cmd_GetUserdata(node->name);
        if (userData && userData == node)
            Cmd_RemoveCommand(node->name);
    }
    uiNode::deleteNode(node);
}

void uiConFuncNode::onWindowOpened (uiNode_t* node, linkedList_t* params)
{
    if (UI_ConFuncIsVirtual(node)) {
        const value_t* property = UI_GetPropertyFromBehaviour(node->behaviour, "onClick");
        uiNode_t* userData = static_cast<uiNode_t*>(Cmd_GetUserdata(node->name));
        UI_AddListener(userData, property, node);
    }
}

void uiConFuncNode::onWindowClosed (uiNode_t* node)
{
    if (UI_ConFuncIsVirtual(node)) {
        const value_t* property = UI_GetPropertyFromBehaviour(node->behaviour, "onClick");
        uiNode_t* userData = static_cast<uiNode_t*>(Cmd_GetUserdata(node->name));
        UI_RemoveListener(userData, property, node);
    }
}
 
void UI_RegisterConFuncNode (uiBehaviour_t* behaviour)
{
    behaviour->name = "confunc";
    behaviour->isVirtual = true;
    behaviour->isFunction = true;
    behaviour->manager = UINodePtr(new uiConFuncNode());
    behaviour->lua_SWIG_typeinfo = UI_SWIG_TypeQuery("uiConFuncNode_t *");
}
 
static void UI_CvarListenerNodeCallback (const char* cvarName, const char* oldValue, const char* newValue, void* data)
{
    linkedList_t* list = static_cast<linkedList_t*>(data);
    linkedList_t* params = nullptr;
    LIST_AddString(&params, oldValue);
    LIST_AddString(&params, newValue);
    while (list) {
        uiNode_t* node = static_cast<uiNode_t*>(list->data);
        UI_ExecuteEventActionsEx(node, node->onClick, params);
        list = list->next;
    }
}

static void UI_CvarListenerNodeBind (uiNode_t* node)
{
    cvarChangeListener_t* l;
    l = Cvar_RegisterChangeListener(node->name, UI_CvarListenerNodeCallback);
    if (l == nullptr) {
        Com_Printf("Node %s is not binded: cvar %s not found\n", UI_GetPath(node), node->name);
        return;
    }
 
    if (LIST_GetPointer(static_cast<linkedList_t*>(l->data), node) == nullptr) {
        LIST_AddPointer(reinterpret_cast<linkedList_t**>(&l->data), node);
    }
}

void uiCvarNode::onWindowClosed (uiNode_t* node)
{
    cvar_t* var;
 
    var = Cvar_FindVar(node->name);
    if (var == nullptr)
        return;
 
    cvarChangeListener_t* l = var->changeListener;
    while (l) {
        if (l->exec == UI_CvarListenerNodeCallback) {
            LIST_Remove(reinterpret_cast<linkedList_t**>(&l->data), node);
            if (LIST_IsEmpty(static_cast<linkedList_t*>(l->data))) {
                Cvar_UnRegisterChangeListener(node->name, UI_CvarListenerNodeCallback);
            }
            break;
        }
        l = l->next;
    }
}
 
void uiCvarNode::onWindowOpened (uiNode_t* node, linkedList_t* params)
{
    UI_CvarListenerNodeBind(node);
}
 
void uiCvarNode::deleteNode (uiNode_t* node)
{
    uiNode::deleteNode(node);
    onWindowClosed(node);
}
 
void uiCvarNode::clone (const uiNode_t* source, uiNode_t* clone)
{
    uiNode::clone(source, clone);
    UI_CvarListenerNodeBind(clone);
}
 
static void UI_CvarListenerNodeForceBind (uiNode_t* node, const uiCallContext_t* context)
{
    UI_CvarListenerNodeBind(node);
}
 
void UI_RegisterCvarFuncNode (uiBehaviour_t* behaviour)
{
    behaviour->name = "cvarlistener";
    behaviour->isVirtual = true;
    behaviour->isFunction = true;
    behaviour->manager = UINodePtr(new uiCvarNode());
    behaviour->lua_SWIG_typeinfo = UI_SWIG_TypeQuery("uiCvarListenerNode_t *");
 
    /* Force to bind the node to the cvar */
    UI_RegisterNodeMethod(behaviour, "forceBind", UI_CvarListenerNodeForceBind);
}