ui/server/container.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2025 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 <cx/linked_list.h>
#include <cx/buffer.h>

#include "container.h"
#include "args.h"

void ui_container_begin_close(UiObject *obj) {
    UiContainerX *ct = obj->container_end;
    ct->close = 1;
}

int ui_container_finish(UiObject *obj) {
    UiContainerX *ct = obj->container_end;
    if(ct->close) {
        ui_end_new(obj);
        return 0;
    }
    return 1;
}

UiContainerX* ui_widget_container(UiWidget *w) {
    UiContainerX *container = cxZalloc(w->obj->ctx->allocator, sizeof(UiContainerX));
    container->container = w;
    return container;
}

cxmutstr ui_container_args_to_string(UiContext *ctx, UiContainerArgs *args) {
    CxBuffer buf;
    cxBufferInit(&buf, NULL, 256, ctx->allocator, CX_BUFFER_AUTO_EXTEND | CX_BUFFER_FREE_CONTENTS);
    
    cxBufferPutString(&buf, "{");
    
    UI_STANDARD_ARGS(&buf, args);
    UI_SPACING_ARGS(&buf, args);
    if(args->def_hfill) cxBufferPutString(&buf, "\"def_hfill\":true,");
    if(args->def_vfill) cxBufferPutString(&buf, "\"def_vfill\":true,");
    if(args->def_hexpand) cxBufferPutString(&buf, "\"def_hexpand\":true,");
    if(args->def_vexpand) cxBufferPutString(&buf, "\"def_vexpand\":true,");
    
    if(buf.size > 0 && buf.space[buf.size-1] == ',') {
        buf.space[buf.size-1] = ' ';
    }
    cxBufferPutString(&buf, "}");
    return cx_mutstrn(buf.space, buf.size);
}

static UIWIDGET container_create(UiObject *obj, const char *type, UiContainerArgs *args) {
    const CxAllocator *a = obj->ctx->allocator;
    UiWidget *widget = cxZalloc(a, sizeof(UiWidget));
    widget->obj = obj->widget->obj;
    widget->type = cx_str(type);
    widget->args = ui_container_args_to_string(obj->ctx, args);
    widget->children = cxLinkedListCreate(a, NULL, CX_STORE_POINTERS);
    widget->serialize = ui_container_serialize;
    uic_object_push_container(obj, ui_widget_container(widget));
    ui_reg_widget((UiWidget*)widget);
    
    UiWidget *parent = obj->container_end->container;
    cxListAdd(parent->children, widget); 
    
    return widget;
}

void ui_serialize_children(UiWidget *w, CxBuffer *buf) {
    size_t numchildren = cxListSize(w->children);
    if(numchildren > 0) {
        cxBufferPutString(buf, ",\"children\":[");
        CxIterator i = cxListIterator(w->children);
        cx_foreach(UiWidget *, child, i) {
            cxmutstr child_str = child->serialize(child);
            cxBufferWrite(child_str.ptr, 1, child_str.length, buf);
            if(i.index+1 < numchildren) {
                cxBufferPut(buf, ',');
            }
        }
        cxBufferPutString(buf, "]");
    }
}

cxmutstr ui_container_serialize(UiWidget *w) {
    CxBuffer buf;
    cxBufferInit(&buf, NULL, 1024, NULL, CX_BUFFER_AUTO_EXTEND | CX_BUFFER_FREE_CONTENTS);
    
    cxBufferPutString(&buf, "{\"type\":\"");
    cxBufferPutString(&buf, w->type.ptr);
    cxBufferPutString(&buf, "\",\"args\":\"");
    cxBufferPutString(&buf, w->args.ptr);
    cxBufferPutString(&buf, "\",\"obj\":");
    cxBufferPutString(&buf, w->obj->id.ptr);
    cxBufferPutString(&buf, "\",\"id\":");
    cxBufferPutString(&buf, w->id.ptr);
    cxBufferPutString(&buf, "\"");
    
    ui_serialize_children(w, &buf);
    
    cxBufferPutString(&buf, "}\n");
    
    return cx_mutstrn(buf.space, buf.size);
}

UIWIDGET ui_vbox_create(UiObject *obj, UiContainerArgs *args) {
    return container_create(obj, "vbox", args);
}

UIWIDGET ui_hbox_create(UiObject *obj, UiContainerArgs *args) {
    return container_create(obj, "hbox", args);
}

UIWIDGET ui_grid_create(UiObject *obj, UiContainerArgs *args) {
    return container_create(obj, "grid", args);
}