TabView.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 <string.h>
 
#include <Objectively/String.h>
 
#include "TabView.h"
 
#define _Class _TabView
 
#pragma mark - Object
 
static void dealloc(Object *self) {
 
    TabView *this = (TabView *) self;
 
    release(this->tabPageView);
    release(this->tabSelectionView);
    release(this->tabs);
 
    super(Object, self, dealloc);
}
 
#pragma mark - View
 
static void awakeWithDictionary_tabs(const Array *array, ident obj, ident data) {
 
    const String *identifier = $((Dictionary *) obj, objectForKeyPath, "identifier");
    assert(identifier);
 
    TabViewItem *tab = $(alloc(TabViewItem), initWithIdentifier, identifier->chars);
    assert(tab);
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("label", InletTypeView, &tab->label, NULL),
        MakeInlet("view", InletTypeView, &tab->view, NULL)
    );
 
    $((View *) data, bind, inlets, obj);
    $((TabView *) data, addTab, tab);
 
    release(tab);
}
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
    super(View, self, awakeWithDictionary, dictionary);
 
    TabView *this = (TabView *) self;
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("tabPageView", InletTypeView, &this->tabPageView, NULL),
        MakeInlet("tabSelectionView", InletTypeView, &this->tabSelectionView, NULL)
    );
 
    $(self, bind, inlets, dictionary);
 
    const Array *tabs = $(dictionary, objectForKeyPath, "tabs");
    if (tabs) {
        $(tabs, enumerateObjects, awakeWithDictionary_tabs, self);
    }
}
 
static View *init(View *self) {
    return (View *) $((TabView *) self, initWithFrame, NULL);
}
 
static void respondToEvent(View *self, const SDL_Event *event) {
 
    if (event->type == SDL_MOUSEBUTTONUP) {
 
        TabView *this = (TabView *) self;
 
        const Array *tabs = (Array *) this->tabs;
        for (size_t i = 0; i < tabs->count; i++) {
 
            TabViewItem *tab = $(tabs, objectAtIndex, i);
 
            if ($((View *) tab->label, didReceiveEvent, event)) {
                $(this, selectTab, tab);
            }
        }
    }
 
    super(View, self, respondToEvent, event);
}
 
#pragma mark - TabView
 
static void addTab(TabView *self, TabViewItem *tab) {
 
    assert(tab);
 
    $(self->tabs, addObject, tab);
 
    $((View *) self->tabSelectionView, addSubview, (View *) tab->label);
    $((View *) self->tabPageView, addSubview, tab->view);
 
    if (self->delegate.didAddTab) {
        self->delegate.didAddTab(self, tab);
    }
 
    if (self->selectedTab == NULL) {
        $(self, selectTab, tab);
    }
}
 
static TabView *initWithFrame(TabView *self, const SDL_Rect *frame) {
 
    self = (TabView *) super(StackView, self, initWithFrame, frame);
    if (self) {
 
        self->tabPageView = $(alloc(PageView), initWithFrame, NULL);
        assert(self->tabPageView);
 
        self->tabs = $$(MutableArray, array);
        assert(self->tabs);
 
        self->tabSelectionView = $(alloc(StackView), initWithFrame, NULL);
        assert(self->tabSelectionView);
 
        $((View *) self->tabSelectionView, addClassName, "tabSelectionView");
        $((View *) self, addSubview, (View *) self->tabSelectionView);
 
        $((View *) self->tabPageView, addClassName, "tabPageView");
        $((View *) self, addSubview, (View *) self->tabPageView);
    }
 
    return self;
}
 
static void removeTab(TabView *self, TabViewItem *tab) {
 
    assert(tab);
 
    if (self->delegate.willRemoveTab) {
        self->delegate.willRemoveTab(self, tab);
    }
 
    retain(tab);
 
    $(self->tabs, removeObject, tab);
 
    $((View *) self->tabSelectionView, removeSubview, (View *) tab->label);
    $((View *) self->tabPageView, removeSubview, tab->view);
 
    if (self->selectedTab == tab) {
        $(self, selectTab, NULL);
    }
 
    release(tab);
}
 
static void selectTab_enumerate(const Array *array, ident obj, ident data) {
 
    TabViewItem *tab = obj;
 
    int state = tab->state;
 
    if (tab == ((TabView *) data)->selectedTab) {
        state |= TabStateSelected;
    } else {
        state &= ~TabStateSelected;
    }
 
    $(tab, setState, state);
}
 
static void selectTab(TabView *self, TabViewItem *tab) {
 
    if (self->selectedTab != tab) {
 
        const Array *tabs = (Array *) self->tabs;
 
        if (tab) {
            self->selectedTab = tab;
        } else {
            self->selectedTab = $(tabs, firstObject);
        }
 
        $(tabs, enumerateObjects, selectTab_enumerate, self);
 
        if (self->selectedTab) {
            $(self->tabPageView, setCurrentPage, self->selectedTab->view);
 
            if (self->delegate.didSelectTab) {
                self->delegate.didSelectTab(self, self->selectedTab);
            }
        }
 
        self->stackView.view.needsLayout = true;
    }
}
 
static _Bool tabWithIdentifier_predicate(const ident obj, ident data) {
 
    const TabViewItem *tab = obj;
 
    if (tab->identifier) {
        if (data) {
            return !strcmp(tab->identifier, data);
        } else {
            return false;
        }
    } else {
        return data == NULL;
    }
}
 
static TabViewItem *tabWithIdentifier(const TabView *self, const char *identifier) {
    return $((Array *) self->tabs, findObject, tabWithIdentifier_predicate, (ident) identifier);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
 
    ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
    ((ViewInterface *) clazz->interface)->init = init;
    ((ViewInterface *) clazz->interface)->respondToEvent = respondToEvent;
 
    ((TabViewInterface *) clazz->interface)->addTab = addTab;
    ((TabViewInterface *) clazz->interface)->initWithFrame = initWithFrame;
    ((TabViewInterface *) clazz->interface)->removeTab = removeTab;
    ((TabViewInterface *) clazz->interface)->selectTab = selectTab;
    ((TabViewInterface *) clazz->interface)->tabWithIdentifier = tabWithIdentifier;
}
 
Class *_TabView(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "TabView",
            .superclass = _StackView(),
            .instanceSize = sizeof(TabView),
            .interfaceOffset = offsetof(TabView, interface),
            .interfaceSize = sizeof(TabViewInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class