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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2024 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 "headerbar.h"

#include "button.h"
#include "menu.h"

#if GTK_MAJOR_VERSION >= 3

#ifdef UI_LIBADWAITA
#define UI_HEADERBAR AdwHeaderBar*
#define UI_HEADERBAR_CAST(h) ADW_HEADER_BAR(h)
#define UI_HEADERBAR_PACK_START(h, w) adw_header_bar_pack_start(ADW_HEADER_BAR(h), w)
#define UI_HEADERBAR_PACK_END(h, w) adw_header_bar_pack_end(ADW_HEADER_BAR(h), w)
#define UI_HEADERBAR_SET_TITLE_WIDGET(h, w) adw_header_bar_set_title_widget(ADW_HEADER_BAR(h), w)
#else
#define UI_HEADERBAR GtkHeaderBar*
#define UI_HEADERBAR_CAST(h) GTK_HEADER_BAR(h)
#define UI_HEADERBAR_PACK_START(h, w) gtk_header_bar_pack_start(GTK_HEADER_BAR(h), w)
#define UI_HEADERBAR_PACK_END(h, w) gtk_header_bar_pack_end(GTK_HEADER_BAR(h), w)
#if GTK_MAJOR_VERSION >= 4
#define UI_HEADERBAR_SET_TITLE_WIDGET(h, w) gtk_header_bar_set_title_widget(GTK_HEADER_BAR(h), w)
#else
#define UI_HEADERBAR_SET_TITLE_WIDGET(h, w) gtk_header_bar_set_custom_title(GTK_HEADER_BAR(h), w)
#endif
#endif
    
void ui_fill_headerbar(UiObject *obj, GtkWidget *headerbar) {
    CxList *left_defaults = uic_get_toolbar_defaults(UI_TOOLBAR_LEFT);
    CxList *center_defaults = uic_get_toolbar_defaults(UI_TOOLBAR_CENTER);
    CxList *right_defaults = uic_get_toolbar_defaults(UI_TOOLBAR_RIGHT);
    
    ui_headerbar_add_items(obj, headerbar, left_defaults, UI_TOOLBAR_LEFT);
    ui_headerbar_add_items(obj, headerbar, center_defaults, UI_TOOLBAR_CENTER);
    
    UiToolbarMenuItem *appmenu = uic_get_appmenu();
    if(appmenu) {
        ui_add_headerbar_menu(headerbar, NULL, appmenu, obj, UI_TOOLBAR_RIGHT);
    }
    ui_headerbar_add_items(obj, headerbar, right_defaults, UI_TOOLBAR_RIGHT);
}

static void create_item(UiObject *obj, GtkWidget *headerbar, GtkWidget *box, UiToolbarItemI *i, enum UiToolbarPos pos) {
    switch(i->type) {
        case UI_TOOLBAR_ITEM: {
            ui_add_headerbar_item(headerbar, box, (UiToolbarItem*)i, obj, pos);
            break;
        }
        case UI_TOOLBAR_TOGGLEITEM: {
            ui_add_headerbar_toggleitem(headerbar, box, (UiToolbarToggleItem*)i, obj, pos);
            break;
        }
        case UI_TOOLBAR_MENU: {
            ui_add_headerbar_menu(headerbar, box, (UiToolbarMenuItem*)i, obj, pos);
            break;
        }
        default: fprintf(stderr, "toolbar item type unimplemented: %d\n", (int)i->type);
    }
}

static void headerbar_add(GtkWidget *headerbar, GtkWidget *box, GtkWidget *item, enum UiToolbarPos pos) {
    switch(pos) {
        case UI_TOOLBAR_LEFT: {
            UI_HEADERBAR_PACK_START(headerbar, item);
            break;
        }
        case UI_TOOLBAR_CENTER: {
            
#if GTK_MAJOR_VERSION >= 4
            gtk_box_append(GTK_BOX(box), item);
#else
            gtk_box_pack_start(GTK_BOX(box), item, 0, 0, 0);
#endif
            break;
        }
        case UI_TOOLBAR_RIGHT: {
            UI_HEADERBAR_PACK_END(headerbar, item);
            break;
        }
    }
}

void ui_headerbar_add_items(UiObject *obj, GtkWidget *headerbar, CxList *items, enum UiToolbarPos pos) {
    GtkWidget *box = NULL;
    
    if(pos == UI_TOOLBAR_CENTER && cxListSize(items) > 0) {
        box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 6);
        UI_HEADERBAR_SET_TITLE_WIDGET(headerbar, box);
    }
    
    CxIterator i = pos == UI_TOOLBAR_RIGHT ? cxListBackwardsIterator(items) : cxListIterator(items);
    cx_foreach(char*, def, i) {
        UiToolbarItemI* item = uic_toolbar_get_item(def);
        if (!item) {
            fprintf(stderr, "unknown toolbar item: %s\n", def);
            continue;
        }
        create_item(obj, headerbar, box, item, pos);
    }
}

void ui_add_headerbar_item(
        GtkWidget *headerbar,
        GtkWidget *box,
        UiToolbarItem *item,
        UiObject *obj,
        enum UiToolbarPos pos)
{
    GtkWidget *button = ui_create_button(obj, item->args.label, item->args.icon, item->args.onclick, item->args.onclickdata);
    WIDGET_ADD_CSS_CLASS(button, "flat");
    headerbar_add(headerbar, box, button, pos);
}

void ui_add_headerbar_toggleitem(
        GtkWidget *headerbar,
        GtkWidget *box,
        UiToolbarToggleItem *item,
        UiObject *obj,
        enum UiToolbarPos pos)
{
    GtkWidget *button = gtk_toggle_button_new();
    WIDGET_ADD_CSS_CLASS(button, "flat");
    ui_setup_togglebutton(obj, button, item->args.label, item->args.icon, item->args.varname, NULL, item->args.onchange, item->args.onchangedata);
    headerbar_add(headerbar, box, button, pos);
}

void ui_add_headerbar_menu(
        GtkWidget *headerbar,
        GtkWidget *box,
        UiToolbarMenuItem *item,
        UiObject *obj,
        enum UiToolbarPos pos)
{
    
    
#if GTK_MAJOR_VERSION >= 4
    GtkWidget *menubutton = gtk_menu_button_new();
    if(item->args.label) {
        gtk_menu_button_set_label(GTK_MENU_BUTTON(menubutton), item->args.label);
    }
    if(item->args.icon) {
        gtk_menu_button_set_icon_name(GTK_MENU_BUTTON(menubutton), item->args.icon); 
    }
    
    if(!item->args.label && !item->args.icon) {
        gtk_menu_button_set_icon_name(GTK_MENU_BUTTON(menubutton), "open-menu-symbolic"); 
    }
    
    GMenu *menu = g_menu_new();
    ui_gmenu_add_menu_items(menu, 0, &item->menu, obj);
    
    gtk_menu_button_set_menu_model(GTK_MENU_BUTTON(menubutton), G_MENU_MODEL(menu));
#else
    GtkWidget *menubutton = gtk_menu_button_new();
    
    // TODO
    
    
#endif
    
    headerbar_add(headerbar, box, menubutton, pos);
}
    
#endif