ViewController.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for OpenGL, SDL2 and GNU C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
 
#include "ViewController.h"
 
#define _Class _ViewController
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    ViewController *this = (ViewController *) self;
 
    release(this->childViewControllers);
    release(this->view);
 
    super(Object, self, dealloc);
}
 
#pragma mark - ViewController
 
static void addChildViewController(ViewController *self, ViewController *childViewController) {
 
    assert(childViewController);
 
    ViewController *that = retain(childViewController);
 
    $(childViewController, removeFromParentViewController);
 
    $(self->childViewControllers, addObject, childViewController);
    childViewController->parentViewController = self;
 
    $(self, loadViewIfNeeded);
    $(childViewController, loadViewIfNeeded);
 
    if (self->view->window) {
        $(childViewController, viewWillAppear);
    }
 
    $(self->view, addSubview, childViewController->view);
    $(childViewController->view, updateBindings);
 
    if (self->view->window) {
        $(childViewController, viewDidAppear);
    }
 
    release(that);
}
 
static void handleNotification_recurse(const Array *array, ident obj, ident data) {
    $((ViewController *) obj, handleNotification, data);
}
 
static void handleNotification(ViewController *self, const Notification *notification) {
    $((Array *) self->childViewControllers, enumerateObjects, handleNotification_recurse, (ident) notification);
}
 
static ViewController *init(ViewController *self) {
 
    self = (ViewController *) super(Object, self, init);
    if (self) {
        self->childViewControllers = $$(MutableArray, arrayWithCapacity, 0);
        assert(self->childViewControllers);
    }
 
    return self;
}
 
static void loadView(ViewController *self) {
 
    View *view = $(alloc(View), initWithFrame, NULL);
    assert(view);
 
    view->autoresizingMask = ViewAutoresizingFill;
 
    $(self, setView, view);
    release(view);
}
 
static void loadViewIfNeeded(ViewController *self) {
 
    if (self->view == NULL) {
        $(self, loadView);
    }
 
    assert(self->view);
}
 
static void moveToParentViewController(ViewController *self, ViewController *parentViewController) {
 
    ViewController *this = retain(self);
 
    $(self, removeFromParentViewController);
 
    if (parentViewController) {
        $(parentViewController, addChildViewController, self);
    }
 
    release(this);
}
 
static void removeChildViewController(ViewController *self, ViewController *childViewController) {
 
    assert(childViewController);
    assert(childViewController->parentViewController == self);
 
    ViewController *that = retain(childViewController);
 
    $(self->childViewControllers, removeObject, childViewController);
    childViewController->parentViewController = NULL;
 
    $(childViewController, viewWillDisappear);
    $(childViewController->view, removeFromSuperview);
    $(childViewController, viewDidDisappear);
 
    release(that);
}
 
static void removeFromParentViewController(ViewController *self) {
 
    if (self->parentViewController) {
        $(self->parentViewController, removeChildViewController, self);
    }
}
 
static void respondToEvent(ViewController *self, const SDL_Event *event) {
 
}
 
static void setView(ViewController *self, View *view) {
 
    if (view != self->view) {
 
        if (self->view) {
            self->view->viewController = NULL;
            release(self->view);
        }
 
        if (view) {
            self->view = retain(view);
            self->view->viewController = self;
        } else {
            self->view = NULL;
        }
    }
}
 
static void viewDidAppear_recurse(const Array *array, ident obj, ident data) {
    $((ViewController *) obj, viewDidAppear);
}
 
static void viewDidAppear(ViewController *self) {
    $((Array *) self->childViewControllers, enumerateObjects, viewDidAppear_recurse, NULL);
}
 
static void viewDidDisappear_recurse(const Array *array, ident obj, ident data) {
    $((ViewController *) obj, viewDidAppear);
}
 
static void viewDidDisappear(ViewController *self) {
    $((Array *) self->childViewControllers, enumerateObjects, viewDidDisappear_recurse, NULL);
}
 
static void viewWillAppear_recurse(const Array *array, ident obj, ident data) {
    $((ViewController *) obj, viewWillAppear);
}
 
static void viewWillAppear(ViewController *self) {
    $((Array *) self->childViewControllers, enumerateObjects, viewWillAppear_recurse, NULL);
}
 
static void viewWillDisappear_recurse(const Array *array, ident obj, ident data) {
    $((ViewController *) obj, viewWillDisappear);
}
 
static void viewWillDisappear(ViewController *self) {
    $((Array *) self->childViewControllers, enumerateObjects, viewWillDisappear_recurse, NULL);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewControllerInterface *) clazz->interface)->addChildViewController = addChildViewController;
    ((ViewControllerInterface *) clazz->interface)->handleNotification = handleNotification;
    ((ViewControllerInterface *) clazz->interface)->init = init;
    ((ViewControllerInterface *) clazz->interface)->loadView = loadView;
    ((ViewControllerInterface *) clazz->interface)->loadViewIfNeeded = loadViewIfNeeded;
    ((ViewControllerInterface *) clazz->interface)->moveToParentViewController = moveToParentViewController;
    ((ViewControllerInterface *) clazz->interface)->removeChildViewController = removeChildViewController;
    ((ViewControllerInterface *) clazz->interface)->removeFromParentViewController = removeFromParentViewController;
    ((ViewControllerInterface *) clazz->interface)->respondToEvent = respondToEvent;
    ((ViewControllerInterface *) clazz->interface)->setView = setView;
    ((ViewControllerInterface *) clazz->interface)->viewDidAppear = viewDidAppear;
    ((ViewControllerInterface *) clazz->interface)->viewDidDisappear = viewDidDisappear;
    ((ViewControllerInterface *) clazz->interface)->viewWillAppear = viewWillAppear;
    ((ViewControllerInterface *) clazz->interface)->viewWillDisappear = viewWillDisappear;
}
 
Class *_ViewController(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "ViewController",
            .superclass = _Object(),
            .instanceSize = sizeof(ViewController),
            .interfaceOffset = offsetof(ViewController, interface),
            .interfaceSize = sizeof(ViewControllerInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class