/*
 * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */

#ifndef _MDC_COMMON_H_
#define _MDC_COMMON_H_

#ifndef _WIN32
#include <glib.h>
#include <list>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <stdexcept>
#include <assert.h>
#include <algorithm>
#include <typeinfo>
#include <stdio.h>

#define _USE_MATH_DEFINES
#include <math.h>

#include "cairo/cairo.h"

#ifdef __APPLE__
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#endif

#include "base/geometry.h"
#include "base/drawing.h"
#include "base/string_utilities.h"

#include "mdc_canvas_public.h"

#define BEGIN_MDC_DECLS namespace mdc {
#define END_MDC_DECLS };


#ifdef _WIN32
#define DEFAULT_FONT_FACE "Arial"
#elif defined(__APPLE__)
#define DEFAULT_FONT_FACE "Lucida Grande"
#else
#define DEFAULT_FONT_FACE "Helvetica"
#endif


#define MM_TO_PT(m) ((m)/(25.4 / 72.0))

#ifndef GL_BGRA
#define GL_BGRA GL_BGRA_EXT
#endif

BEGIN_MDC_DECLS

typedef unsigned int Count;
typedef double Timestamp;

enum FontSlant {
  SNormal= CAIRO_FONT_SLANT_NORMAL,
  SOblique= CAIRO_FONT_SLANT_OBLIQUE,
  SItalic= CAIRO_FONT_SLANT_ITALIC
};

enum FontWeight {
  WNormal= CAIRO_FONT_WEIGHT_NORMAL,
  WBold= CAIRO_FONT_WEIGHT_BOLD
};

struct MYSQLCANVAS_PUBLIC_FUNC FontSpec {
  std::string family;
  FontSlant slant;
  FontWeight weight;
  float size;

  inline FontSpec &operator= (const FontSpec &font) 
  {
    family= font.family;
    slant= font.slant;
    weight= font.weight;
    size= font.size;
    
    return *this;
  }

  inline bool operator != (const FontSpec &font) const
  {
    return (family != font.family || slant != font.slant || weight != font.weight) || size != font.size;
  }

  inline bool operator == (const FontSpec &font) const
  {
    return (family == font.family && slant == font.slant && weight == font.weight && size == font.size);
  }

  FontSpec(const FontSpec &other)
    : family(other.family), slant(other.slant), weight(other.weight), size(other.size) {}

  FontSpec() : family(DEFAULT_FONT_FACE), slant(SNormal), weight(WNormal), size(12) {}

  FontSpec(const std::string &afamily, FontSlant aslant=SNormal, FontWeight aweight=WNormal, float asize= 12.0)
    : family(afamily), slant(aslant), weight(aweight), size(asize) {}

  void toggle_bold(bool flag) { weight= flag ? WBold : WNormal; }
  void toggle_italic(bool flag) { slant= flag ? SItalic : SNormal; }

  static FontSpec from_string(const std::string &spec)
  {
    std::string font;
    float size;
    bool bold;
    bool italic;
    if (base::parse_font_description(spec, font, size, bold, italic))
      return FontSpec(font, italic ? SItalic : SNormal,  bold ? WBold : WNormal, size);
    else
      return FontSpec();

  }
};


class canvas_error : public std::runtime_error
{
public:
  canvas_error(const std::string &msg) : std::runtime_error(msg) {};
};




class MYSQLCANVAS_PUBLIC_FUNC Surface
{
protected:
  cairo_surface_t *surface;

  Surface() : surface(0) {}

public:
  Surface(const Surface &other);
  Surface(cairo_surface_t *surface);

  virtual ~Surface();

  Surface &operator= (const Surface &s)
  {
    if (this != &s)
    {
      if (surface != NULL)
        cairo_surface_destroy(surface);
      surface = cairo_surface_reference(s.surface);
    }

    return *this;
  }

  cairo_surface_t *get_surface() const { return surface; }
};


class MYSQLCANVAS_PUBLIC_FUNC PDFSurface : public Surface
{
public:
  PDFSurface(cairo_surface_t *surface) : Surface(surface) {}
  PDFSurface(const std::string &path, double width, double height);
};


class MYSQLCANVAS_PUBLIC_FUNC PSSurface : public Surface
{
public:
  PSSurface(cairo_surface_t *surface) : Surface(surface) {}
  PSSurface(const std::string &path, double width, double height);
};


class MYSQLCANVAS_PUBLIC_FUNC ImageSurface : public Surface
{
public:
  ImageSurface(double width, double height, cairo_format_t format);
};


#ifdef _WIN32
class MYSQLCANVAS_PUBLIC_FUNC Win32Surface : public Surface
{
public:
  Win32Surface(HDC hdc, bool printing= false);
};
#endif


class FontManager;

struct MYSQLCANVAS_PUBLIC_FUNC CairoCtx 
{
private:
  cairo_t *cr;

  FontManager *fm;
  
  bool _free_cr;
  
public:
  CairoCtx();
  CairoCtx(cairo_t *cr);
  CairoCtx(cairo_surface_t *surf);
  CairoCtx(const Surface &surf);
  ~CairoCtx();

  void check_state() const;

  void update_cairo_backend(cairo_surface_t* surface);
  inline cairo_t *get_cr() { return cr; }

  inline void save() const { cairo_save(cr); check_state(); }
  inline void restore() const { cairo_restore(cr); check_state(); }
  inline void show_page() { cairo_show_page(cr); }

  inline void translate(const base::Point &p) { cairo_translate(cr, p.x, p.y); }
  inline void translate(double x, double y) { cairo_translate(cr, x, y); }
  inline void scale(const base::Point &p) { cairo_scale(cr, p.x, p.y); }
  inline void scale(double x, double y) { cairo_scale(cr, x, y); }
  inline void rotate(double rad) { cairo_rotate(cr, rad); }

  inline void set_line_width(double width) { cairo_set_line_width(cr, width); }
  inline void set_line_cap(cairo_line_cap_t t) { cairo_set_line_cap(cr, t); }
  inline void set_line_join(cairo_line_join_t t) { cairo_set_line_join(cr, t); }
  inline void set_miter_limit(double l) { cairo_set_miter_limit(cr, l); }

  inline void set_dash(double dashes[], int ndashes, double offset) { cairo_set_dash(cr, dashes, ndashes, offset); }
  inline void set_operator(cairo_operator_t oper) { cairo_set_operator(cr, oper); }

  inline void set_color(const base::Color &color) const
  {
    if (color.alpha == 1.0) 
      cairo_set_source_rgb(cr, color.red, color.green, color.blue);
    else 
      cairo_set_source_rgba(cr, color.red, color.green, color.blue, color.alpha);
  }
  
  inline void set_color(const base::Color &color, double alpha) const
  {
    cairo_set_source_rgba(cr, color.red, color.green, color.blue, alpha);
  }

  void set_font(const FontSpec &font) const;
  void get_text_extents(const FontSpec &font, const std::string &text,
                        cairo_text_extents_t &extents);
  void get_text_extents(const FontSpec &font, const char *text,
                        cairo_text_extents_t &extents);
  bool get_font_extents(const FontSpec &font, 
                        cairo_font_extents_t &extents);

  inline void set_source_surface(cairo_surface_t *srf, double x, double y) {
    cairo_set_source_surface(cr, srf, x, y);
  }

  inline void set_mask(cairo_pattern_t *pat) {
    cairo_mask(cr, pat);
  }

  inline void set_mask_surface(cairo_surface_t *surf, double x, double y) {
    cairo_mask_surface(cr, surf, x, y);
  }
  
  inline void set_pattern(cairo_pattern_t *pat) { cairo_set_source(cr, pat); }

  inline void paint() { cairo_paint(cr); }
  inline void paint_with_alpha(double a) { cairo_paint_with_alpha(cr, a); }

  inline void clip() { cairo_clip(cr); }

  inline void stroke() { cairo_stroke(cr); }
  inline void fill() { cairo_fill(cr); }
  inline void stroke_preserve() { cairo_stroke_preserve(cr); }
  inline void fill_preserve() { cairo_fill_preserve(cr); }

  inline void move_to(const base::Point &pt) { cairo_move_to(cr, pt.x, pt.y); }
  inline void move_to(double x, double y) { cairo_move_to(cr, x, y); }

  inline void line_to(const base::Point &pt) { cairo_line_to(cr, pt.x, pt.y); }
  inline void line_to(double x, double y) { cairo_line_to(cr, x, y); }

  inline void arc(double cx, double cy, double r, double start, double end)
  {
    cairo_arc(cr, cx, cy, r, start, end); 
  }
  
  inline void show_text(const std::string &text) { cairo_show_text(cr, text.c_str()); }
  
  inline void new_path() { cairo_new_path(cr); }
  inline void close_path() { cairo_close_path(cr); }

  inline void rectangle(const base::Rect &rect) { cairo_rectangle(cr, rect.left(), rect.top(), rect.width(), rect.height()); }
  inline void rectangle(double x, double y, double w, double h) { cairo_rectangle(cr, x, y, w, h); }
};



#define DOUBLE_CLICK_DELAY 0.400

MYSQLCANVAS_PUBLIC_FUNC Timestamp get_time();

cairo_status_t write_to_surface(void *closure, const unsigned char *data, unsigned int length);

END_MDC_DECLS

#endif /* _MDC_COMMON_H_ */
