ui/common/object.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2017 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>

#include "object.h"
#include "context.h"

void ui_end(UiObject *obj) {
    if(!obj->next) {
        return;
    }
    
    UiObject *prev = NULL;
    while(obj->next) {
        prev = obj;
        obj = obj->next;
    }
    
    if(prev) {
        // TODO: free last obj
        prev->next = NULL;
    }
}

void ui_object_ref(UiObject *obj) {
    obj->ref++;
}

void ui_object_unref(UiObject *obj) {
    // it is possible to have 0 references, in case
    // a window was created but ui_show was never called
    if(obj->ref == 0 || --obj->ref == 0) {
        if(obj->destroy) {
            obj->destroy(obj);
        } else {
            uic_object_destroy(obj);
        }
    }
}

void uic_object_destroy(UiObject *obj) {
    if(obj->ctx->close_callback) {
        UiEvent ev;
        ev.window = obj->window;
        ev.document = obj->ctx->document;
        ev.obj = obj;
        ev.eventdata = NULL;
        ev.intval = 0;
        obj->ctx->close_callback(&ev, obj->ctx->close_data);
    }
    cxMempoolDestroy(obj->ctx->mp);
}

UiObject* uic_object_new(UiObject *toplevel, UIWIDGET widget) {
    return uic_ctx_object_new(toplevel->ctx, widget);
}

UiObject* uic_ctx_object_new(UiContext *ctx, UIWIDGET widget) {
    UiObject *newobj = cxCalloc(ctx->allocator, 1, sizeof(UiObject));
    newobj->ctx = ctx;
    newobj->widget = widget;
    
    return newobj;
}

void uic_obj_add(UiObject *toplevel, UiObject *ctobj) {
    UiObject *current = uic_current_obj(toplevel);
    current->next = ctobj;
}

UiObject* uic_current_obj(UiObject *toplevel) {
    if(!toplevel) {
        return NULL;
    }
    UiObject *obj = toplevel;
    while(obj->next) {
        obj = obj->next;
    }
    return obj;
}

UiContainer* uic_get_current_container(UiObject *obj) {
    return uic_current_obj(obj)->container;
}