tip/ui/cocoa/label.m

/*
 * 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.
 */

#import "label.h"
#import "Container.h"

#import <string.h>

static UIWIDGET create_label(UiObject *obj, UiLabelArgs *args) {
    NSTextField *label = [[NSTextField alloc] init];
    label.editable = NO;
    label.bezeled = NO;
    label.drawsBackground = NO;
    label.selectable = NO;
    
    NSTextAlignment alignment;
    switch(args->align) {
        case UI_ALIGN_LEFT: alignment = NSTextAlignmentLeft; break;
        case UI_ALIGN_RIGHT: alignment = NSTextAlignmentRight; break;
        default: alignment = NSTextAlignmentCenter;
    }
    label.alignment = alignment;
    
    if(args->label) {
        NSString *str = [[NSString alloc] initWithUTF8String:args->label];
        label.stringValue = str;
    }
    
    UiLayout layout = UI_ARGS2LAYOUT(args);
    ui_container_add(obj, label, &layout);
    
    UiVar *var = uic_widget_var(obj->ctx, obj->ctx, args->value, args->varname, UI_VAR_STRING);
    if(var) {
        UiString *s = var->value;
        s->obj = (__bridge void*)label;
        s->get = ui_label_get;
        s->set = ui_label_set;
        
        if(s->value.ptr) {
            label.stringValue = [[NSString alloc]initWithUTF8String:s->value.ptr];
        }
    }
    
    return (__bridge void*)label;
}


UIWIDGET ui_label_create(UiObject* obj, UiLabelArgs *args) {
    return create_label(obj, args);
}

UIWIDGET ui_llabel_create(UiObject* obj, UiLabelArgs *args) {
    args->align = UI_ALIGN_LEFT;
    return create_label(obj, args);
}

UIWIDGET ui_rlabel_create(UiObject* obj, UiLabelArgs *args) {
    args->align = UI_ALIGN_RIGHT;
    return create_label(obj, args);
}


char* ui_label_get(UiString *s) {
    NSTextField *label = (__bridge NSTextField*)s->obj;
    if(s->value.free) {
        s->value.free(s->value.ptr);
    }
    s->value.ptr = strdup(label.stringValue.UTF8String);
    return s->value.ptr;
}

void ui_label_set(UiString *s, const char *str) {
    NSTextField *label = (__bridge NSTextField*)s->obj;
    if(s->value.free) {
        s->value.free(s->value.ptr);
    }
    s->value.ptr = NULL;
    label.stringValue = [[NSString alloc] initWithUTF8String:str];
}