Theme.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 <Objectively/JSONSerialization.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) {
    $((MutableArray *) 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 = $$(MutableArray, arrayWithCapacity, 8);
        assert(self->stylesheets);
 
        $(self, addStylesheet, $$(Stylesheet, defaultStylesheet));
    }
 
    return self;
}
 
static void removeStylesheet(Theme *self, Stylesheet *stylesheet) {
    $((MutableArray *) 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