ViewController.c

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/*
 * ObjectivelyMVC: Object oriented MVC framework for SDL3 and 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 ViewController *init(ViewController *self) {
 
  self = (ViewController *) super(Object, self, init);
  if (self) {
    self->childViewControllers = $$(Array, 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);
  assert(self->view->viewController == self);
}
 
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_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, respondToEvent, (const SDL_Event *) data);
}
 
static void respondToEvent(ViewController *self, const SDL_Event *event) {
  $((Array *) self->childViewControllers, enumerate, respondToEvent_enumerate, (ident) event);
}
 
static void renderDeviceDidReset_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, renderDeviceDidReset);
}
 
static void renderDeviceDidReset(ViewController *self) {
  
  $(self->view, renderDeviceDidReset);
  
  $((Array *) self->childViewControllers, enumerate, renderDeviceDidReset_enumerate, NULL);
}
 
static void renderDeviceWillReset_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, renderDeviceWillReset);
}
 
static void renderDeviceWillReset(ViewController *self) {
  
  $(self->view, renderDeviceWillReset);
  
  $((Array *) self->childViewControllers, enumerate, renderDeviceWillReset_enumerate, NULL);
}
 
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_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, viewDidAppear);
}
 
static void viewDidAppear(ViewController *self) {
  $((Array *) self->childViewControllers, enumerate, viewDidAppear_enumerate, NULL);
}
 
static void viewDidDisappear_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, viewDidDisappear);
}
 
static void viewDidDisappear(ViewController *self) {
  $((Array *) self->childViewControllers, enumerate, viewDidDisappear_enumerate, NULL);
}
 
static void viewWillAppear_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, viewWillAppear);
}
 
static void viewWillAppear(ViewController *self) {
  $((Array *) self->childViewControllers, enumerate, viewWillAppear_enumerate, NULL);
}
 
static void viewWillDisappear_enumerate(const Array *array, ident obj, ident data) {
  $((ViewController *) obj, viewWillDisappear);
}
 
static void viewWillDisappear(ViewController *self) {
  $((Array *) self->childViewControllers, enumerate, viewWillDisappear_enumerate, NULL);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ViewControllerInterface *) clazz->interface)->addChildViewController = addChildViewController;
  ((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)->renderDeviceDidReset = renderDeviceDidReset;
  ((ViewControllerInterface *) clazz->interface)->renderDeviceWillReset = renderDeviceWillReset;
  ((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