Theme.c

Go to the documentation of this file.

/*
 * 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 <Objectively/JSONContext.h>
 
#include "Log.h"
#include "Theme.h"
#include "View.h"
#include "WindowController.h"
 
#define _Class _Theme
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
  Theme *this = (Theme *) self;
 
  release(this->stylesheets);
 
  super(Object, self, dealloc);
}
 
#pragma mark - Theme
 
static void addStylesheet(Theme *self, Stylesheet *stylesheet) {
  $((Array *) self->stylesheets, addObject, stylesheet);
}
 
static ident computeStyle_reduce(const ident obj, ident accumulator, ident data) {
 
  const Stylesheet *stylesheet = obj;
 
  const View *view = data;
 
  const Array *selectors = (Array *) stylesheet->selectors;
  for (size_t i = 0; i < selectors->count; i++) {
 
    Selector *selector = $(selectors, objectAtIndex, i);
    if ($(selector, matchesView, view)) {
 
      assert(selector->style);
 
      if (MVC_LogEnabled(SDL_LOG_PRIORITY_VERBOSE)) {
 
        String *this = $((Object *) selector, description);
        String *that = $((Object *) view, description);
 
        MVC_LogVerbose("%s -> %s\n", this->chars, that->chars);
 
        release(this);
        release(that);
      }
 
      if ($(selector->style, attributeValue, "debug")) {
        SDL_TriggerBreakpoint();
      }
 
      $((Style *) accumulator, addSelector, selector);
      $((Style *) accumulator, addAttributes, selector->style->attributes);
    }
  }
 
  return accumulator;
}
 
static Style *computeStyle(const Theme *self, const View *view) {
 
  assert(view);
 
  Style *style = $(alloc(Style), initWithAttributes, NULL);
  assert(style);
 
  return $((Array *) self->stylesheets, reduce, computeStyle_reduce, style, (ident) view);
}
 
static Theme *init(Theme *self) {
 
  self = (Theme *) super(Object, self, init);
  if (self) {
 
    self->stylesheets = $$(Array, arrayWithCapacity, 8);
    assert(self->stylesheets);
 
    $(self, addStylesheet, $$(Stylesheet, defaultStylesheet));
  }
 
  return self;
}
 
static void removeStylesheet(Theme *self, Stylesheet *stylesheet) {
  $((Array *) self->stylesheets, removeObject, stylesheet);
}
 
static Theme *theme(SDL_Window *window) {
 
  assert(window);
 
  WindowController *windowController = $$(WindowController, windowController, window);
  if (windowController) {
    return windowController->theme;
  }
 
  return NULL;
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
  ((ThemeInterface *) clazz->interface)->addStylesheet = addStylesheet;
  ((ThemeInterface *) clazz->interface)->computeStyle = computeStyle;
  ((ThemeInterface *) clazz->interface)->init = init;
  ((ThemeInterface *) clazz->interface)->removeStylesheet = removeStylesheet;
  ((ThemeInterface *) clazz->interface)->theme = theme;
}
 
Class *_Theme(void) {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "Theme",
      .superclass = _Object(),
      .instanceSize = sizeof(Theme),
      .interfaceOffset = offsetof(Theme, interface),
      .interfaceSize = sizeof(ThemeInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}
 
#undef _Class