Text.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 <stdarg.h>
#include <string.h>
 
#include "Text.h"
 
#define _Class _Text
 
#pragma mark - ObjectInterface
 
static void dealloc(Object *self) {
 
    Text *this = (Text *) self;
 
    release(this->font);
 
    free(this->text);
 
    if (this->texture) {
        glDeleteTextures(1, &this->texture);
    }
 
    super(Object, self, dealloc);
}
 
static String *description(const Object *self) {
 
    View *this = (View *) self;
 
    String *classNames = $((Object *) this->classNames, description);
    String *description = str("%s@%p \"%s\" %s [%d, %d, %d, %d]",
                              this->identifier ?: classnameof(self),
                              self,
                              ((Text *) self)->text,
                              classNames->chars,
                              this->frame.x, this->frame.y, this->frame.w, this->frame.h);
 
    release(classNames);
    return description;
}
 
#pragma mark - View
 
static void applyStyle(View *self, const Style *style) {
 
    super(View, self, applyStyle, style);
 
    Text *this = (Text *) self;
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("color", InletTypeColor, &this->color, NULL)
    );
 
    $(self, bind, inlets, style->attributes);
 
    char *fontFamily = NULL;
    int fontSize = -1, fontStyle = -1;
 
    const Inlet fontInlets[] = MakeInlets(
        MakeInlet("font-family", InletTypeCharacters, &fontFamily, NULL),
        MakeInlet("font-size", InletTypeInteger, &fontSize, NULL),
        MakeInlet("font-style", InletTypeEnum, &fontStyle, (ident) FontStyleNames)
    );
 
    if ($(self, bind, fontInlets, style->attributes)) {
 
        Font *font = $$(Font, cachedFont, fontFamily , fontSize, fontStyle);
        assert(font);
 
        $(this, setFont, font);
 
        if (fontFamily) {
            free(fontFamily);
        }
    }
}
 
static void awakeWithDictionary(View *self, const Dictionary *dictionary) {
 
    super(View, self, awakeWithDictionary, dictionary);
 
    Text *this = (Text *) self;
 
    const Inlet inlets[] = MakeInlets(
        MakeInlet("color", InletTypeColor, &this->color, NULL),
        MakeInlet("font", InletTypeFont, &this->font, NULL),
        MakeInlet("lineWrap", InletTypeBool, &this->lineWrap, NULL),
        MakeInlet("text", InletTypeCharacters, &this->text, NULL)
    );
 
    $(self, bind, inlets, dictionary);
}
 
static View *init(View *self) {
    return (View *) $((Text *) self, initWithText, NULL, NULL);
}
 
static void render(View *self, Renderer *renderer) {
 
    super(View, self, render, renderer);
 
    Text *this = (Text *) self;
 
    assert(this->font);
 
    if (this->text) {
 
        const SDL_Rect frame = $(self, renderFrame);
 
        if (this->texture == 0) {
            SDL_Surface *surface = $(this->font, renderCharacters,
                                     this->text,
                                     this->color,
                                     this->lineWrap ? frame.w : 0);
            assert(surface);
 
            this->texture = $(renderer, createTexture, surface);
 
            SDL_FreeSurface(surface);
        }
 
        assert(this->texture);
 
        $(renderer, drawTexture, this->texture, &frame);
    }
}
 
static void renderDeviceDidReset(View *self) {
 
    Text *this = (Text *) self;
 
    $(this->font, renderDeviceDidReset);
 
    super(View, self, renderDeviceDidReset);
}
 
static void renderDeviceWillReset(View *self) {
 
    Text *this = (Text *) self;
 
    if (this->texture) {
        glDeleteTextures(1, &this->texture);
        this->texture = 0;
    }
 
    super(View, self, renderDeviceWillReset);
}
 
static SDL_Size sizeThatFits(const View *self) {
    return $((Text *) self, naturalSize);
}
 
#pragma mark - Text
 
static Text *initWithText(Text *self, const char *text, Font *font) {
 
    self = (Text *) super(View, self, initWithFrame, NULL);
    if (self) {
        $(self, setFont, font);
        $(self, setText, text);
    }
 
    return self;
}
 
static SDL_Size naturalSize(const Text *self) {
 
    SDL_Size size = MakeSize(0, 0);
 
    if (self->font) {
        $(self->font, sizeCharacters, self->text ?: "", &size.w, &size.h);
    }
 
    return size;
}
 
static void setFont(Text *self, Font *font) {
 
    font = font ?: $$(Font, defaultFont);
 
    if (font != self->font) {
 
        release(self->font);
        self->font = retain(font);
 
        if (self->texture) {
            glDeleteTextures(1, &self->texture);
            self->texture = 0;
        }
 
        $((View *) self, sizeToFit);
    }
}
 
static void setText(Text *self, const char *text) {
 
    if (strcmp(self->text ?: "", text ?: "")) {
 
        free(self->text);
 
        if (text && strlen(text)) {
            self->text = strdup(text);
        } else {
            self->text = NULL;
        }
 
        if (self->texture) {
            glDeleteTextures(1, &self->texture);
            self->texture = 0;
        }
 
        $((View *) self, sizeToFit);
    }
}
 
static void setTextWithFormat(Text *self, const char *fmt, ...) {
 
    va_list args;
    va_start(args, fmt);
 
    char *text;
    const int len = vasprintf(&text, fmt, args);
    if (len >= 0) {
        $(self, setText, text);
    }
 
    free(text);
    va_end(args);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
    ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
    ((ObjectInterface *) clazz->interface)->description = description;
 
    ((ViewInterface *) clazz->interface)->applyStyle = applyStyle;
    ((ViewInterface *) clazz->interface)->awakeWithDictionary = awakeWithDictionary;
    ((ViewInterface *) clazz->interface)->init = init;
    ((ViewInterface *) clazz->interface)->render = render;
    ((ViewInterface *) clazz->interface)->renderDeviceDidReset = renderDeviceDidReset;
    ((ViewInterface *) clazz->interface)->renderDeviceWillReset = renderDeviceWillReset;
    ((ViewInterface *) clazz->interface)->sizeThatFits = sizeThatFits;
 
    ((TextInterface *) clazz->interface)->initWithText = initWithText;
    ((TextInterface *) clazz->interface)->naturalSize = naturalSize;
    ((TextInterface *) clazz->interface)->setFont = setFont;
    ((TextInterface *) clazz->interface)->setText = setText;
    ((TextInterface *) clazz->interface)->setTextWithFormat = setTextWithFormat;
}
 
Class *_Text(void) {
    static Class *clazz;
    static Once once;
 
    do_once(&once, {
        clazz = _initialize(&(const ClassDef) {
            .name = "Text",
            .superclass = _View(),
            .instanceSize = sizeof(Text),
            .interfaceOffset = offsetof(Text, interface),
            .interfaceSize = sizeof(TextInterface),
            .initialize = initialize,
        });
    });
 
    return clazz;
}
 
#undef _Class