ui/server/button.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 "button.h"
#include <cx/buffer.h>
#include <cx/printf.h>

#include "args.h"
#include "container.h"
#include "widget.h"
#include "var.h"

cxmutstr ui_button_args_to_string(UiContext *ctx, UiButtonArgs *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_LABEL_ARGS(&buf, args);
    // TODO: labeltype, states
    
    if(buf.size > 0 && buf.space[buf.size-1] == ',') {
        buf.space[buf.size-1] = ' ';
    }
    cxBufferPutString(&buf, "}");
    return cx_mutstrn(buf.space, buf.size);
}

cxmutstr ui_toggle_args_to_string(UiContext *ctx, UiToggleArgs *args, cxmutstr value) {
    CxBuffer buf;
    cxBufferInit(&buf, NULL, 256, ctx->allocator, CX_BUFFER_AUTO_EXTEND | CX_BUFFER_FREE_CONTENTS);
    
    cxBufferPutString(&buf, "{");
    
    UI_STANDARD_ARGS(&buf, args);
    UI_LABEL_ARGS(&buf, args);
    if(value.ptr) ui_argstr_add_str(&buf, "value", value.ptr);
    // TODO: labeltype, states
    
    if(buf.size > 0 && buf.space[buf.size-1] == ',') {
        buf.space[buf.size-1] = ' ';
    }
    cxBufferPutString(&buf, "}");
    return cx_mutstrn(buf.space, buf.size);
}


UIWIDGET ui_button_create(UiObject *obj, UiButtonArgs *args) {
    UiCallbackWidget *widget = cxZalloc(obj->ctx->allocator, sizeof(UiCallbackWidget));
    widget->widget.obj = obj->widget->obj;
    widget->widget.type = CX_STR("button");
    widget->widget.args = ui_button_args_to_string(obj->ctx, args);
    widget->widget.serialize = (ui_serialize_func)ui_button_serialize;
    widget->callback = args->onclick;
    widget->userdata = args->onclickdata;
    ui_reg_widget((UiWidget*)widget);
    
    UiWidget *parent = obj->container_end->container;
    cxListAdd(parent->children, widget);
    
    return (UiWidget*)widget;
}

cxmutstr ui_button_serialize(UiCallbackWidget *w) {
    CxBuffer buf;
    cxBufferInit(&buf, NULL, 1024, NULL, CX_BUFFER_AUTO_EXTEND | CX_BUFFER_FREE_CONTENTS);
    
    cxBufferPutString(&buf, "{");
    ui_serialize_type_obj_id(&w->widget, &buf);
    cxBufferPutString(&buf, ",\"args\":");
    cxBufferPutString(&buf, w->widget.args.ptr);
    if(w->widget.var_id.ptr) {
        cxBufferPutString(&buf, ",\"value\":\"");
        cxBufferPutString(&buf, w->widget.var_id.ptr);
        cxBufferPutString(&buf, "\"");
    }
    cxBufferPutString(&buf, "}\n");
    
    return cx_mutstrn(buf.space, buf.size);
}

static UIWIDGET togglebutton_create(UiObject *obj, const char *type, UiToggleArgs *args) {
    cxmutstr var_id = cx_mutstrn(NULL, 0);
    UiVar* var = uic_widget_var(obj->ctx, obj->ctx, args->value, args->varname, UI_VAR_INTEGER);
    if(var) {
        UiInteger *i = var->value;
        if(!i->obj) {
            ui_server_bind_int(obj->ctx, i);
        }
        var_id = cx_mutstr(i->obj);
    }
    
    UiCallbackWidget *widget = cxZalloc(obj->ctx->allocator, sizeof(UiCallbackWidget));
    widget->widget.obj = obj->widget->obj;
    widget->widget.type = cx_str(type);
    widget->widget.args = ui_toggle_args_to_string(obj->ctx, args, var_id);
    widget->widget.var_id = var_id;
    widget->widget.var_type = UI_VAR_INTEGER;
    widget->widget.serialize = (ui_serialize_func)ui_button_serialize;
    widget->callback = args->onchange;
    widget->userdata = args->onchangedata;
    ui_reg_widget((UiWidget*)widget);
    
    UiWidget *parent = obj->container_end->container;
    cxListAdd(parent->children, widget);
    
    return (UiWidget*)widget;
}

UIWIDGET ui_togglebutton_create(UiObject *obj, UiToggleArgs *args) {
    return togglebutton_create(obj, "togglebutton", args);
}

UIWIDGET ui_checkbox_create(UiObject *obj, UiToggleArgs *args) {
    return togglebutton_create(obj, "checkbox", args);
}

UIWIDGET ui_switch_create(UiObject *obj, UiToggleArgs *args) {
    return togglebutton_create(obj, "switch", args);
}

UIWIDGET ui_radiobutton_create(UiObject *obj, UiToggleArgs *args) {
    return togglebutton_create(obj, "radiobutton", args);
}