path: root/src/libvterm/include/vterm.h

/*
 * NOTE: This is a MODIFIED version of libvterm, see the README file.
 */
#ifndef __VTERM_H__
#define __VTERM_H__

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>

#include "vterm_keycodes.h"

#define TRUE 1
#define FALSE 0

// from stdint.h
typedef unsigned char		uint8_t;
typedef unsigned int		uint32_t;

#define VTERM_VERSION_MAJOR 0
#define VTERM_VERSION_MINOR 1

#define VTERM_CHECK_VERSION \
        vterm_check_version(VTERM_VERSION_MAJOR, VTERM_VERSION_MINOR)

typedef struct VTerm VTerm;
typedef struct VTermState VTermState;
typedef struct VTermScreen VTermScreen;

// Specifies a screen point.
typedef struct {
  int row;
  int col;
} VTermPos;

/* some small utility functions; we can just keep these static here */

/*
 * Order points by on-screen flow order:
 * Return < 0 if "a" is before "b"
 * Return  0  if "a" and "b" are equal
 * Return > 0 if "a" is after "b".
 */
int vterm_pos_cmp(VTermPos a, VTermPos b);

#if defined(DEFINE_INLINES) || USE_INLINE
INLINE int vterm_pos_cmp(VTermPos a, VTermPos b)
{
  return (a.row == b.row) ? a.col - b.col : a.row - b.row;
}
#endif

// Specifies a rectangular screen area.
typedef struct {
  int start_row;
  int end_row;
  int start_col;
  int end_col;
} VTermRect;

/* true if the rect contains the point */
int vterm_rect_contains(VTermRect r, VTermPos p);

#if defined(DEFINE_INLINES) || USE_INLINE
INLINE int vterm_rect_contains(VTermRect r, VTermPos p)
{
  return p.row >= r.start_row && p.row < r.end_row &&
         p.col >= r.start_col && p.col < r.end_col;
}
#endif

/* move a rect */
// Move "rect" "row_delta" down and "col_delta" right.
// Does not check boundaries.
void vterm_rect_move(VTermRect *rect, int row_delta, int col_delta);

#if defined(DEFINE_INLINES) || USE_INLINE
INLINE void vterm_rect_move(VTermRect *rect, int row_delta, int col_delta)
{
  rect->start_row += row_delta; rect->end_row += row_delta;
  rect->start_col += col_delta; rect->end_col += col_delta;
}
#endif

/**
 * Bit-field describing the value of VTermColor.type
 */
typedef enum {
  /**
   * If the lower bit of `type` is not set, the colour is 24-bit RGB.
   */
  VTERM_COLOR_RGB = 0x00,

  /**
   * The colour is an index into a palette of 256 colours.
   */
  VTERM_COLOR_INDEXED = 0x01,

  /**
   * Mask that can be used to extract the RGB/Indexed bit.
   */
  VTERM_COLOR_TYPE_MASK = 0x01,

  /**
   * If set, indicates that this colour should be the default foreground
   * color, i.e. there was no SGR request for another colour. When
   * rendering this colour it is possible to ignore "idx" and just use a
   * colour that is not in the palette.
   */
  VTERM_COLOR_DEFAULT_FG = 0x02,

  /**
   * If set, indicates that this colour should be the default background
   * color, i.e. there was no SGR request for another colour. A common
   * option when rendering this colour is to not render a background at
   * all, for example by rendering the window transparently at this spot.
   */
  VTERM_COLOR_DEFAULT_BG = 0x04,

  /**
   * Mask that can be used to extract the default foreground/background bit.
   */
  VTERM_COLOR_DEFAULT_MASK = 0x06
} VTermColorType;

/**
 * Returns true if the VTERM_COLOR_RGB `type` flag is set, indicating that the
 * given VTermColor instance is an indexed colour.
 */
#define VTERM_COLOR_IS_INDEXED(col) \
  (((col)->type & VTERM_COLOR_TYPE_MASK) == VTERM_COLOR_INDEXED)

/**
 * Returns true if the VTERM_COLOR_INDEXED `type` flag is set, indicating that
 * the given VTermColor instance is an rgb colour.
 */
#define VTERM_COLOR_IS_RGB(col) \
  (((col)->type & VTERM_COLOR_TYPE_MASK) == VTERM_COLOR_RGB)

/**
 * Returns true if the VTERM_COLOR_DEFAULT_FG `type` flag is set, indicating
 * that the given VTermColor instance corresponds to the default foreground
 * color.
 */
#define VTERM_COLOR_IS_DEFAULT_FG(col) \
  (!!((col)->type & VTERM_COLOR_DEFAULT_FG))

/**
 * Returns true if the VTERM_COLOR_DEFAULT_BG `type` flag is set, indicating
 * that the given VTermColor instance corresponds to the default background
 * color.
 */
#define VTERM_COLOR_IS_DEFAULT_BG(col) \
  (!!((col)->type & VTERM_COLOR_DEFAULT_BG))

typedef struct {
  /**
   * Tag indicating which member is actually valid.
   * Please use the `VTERM_COLOR_IS_*` test macros to check whether a
   * particular type flag is set.
   */
  uint8_t type;

  uint8_t red, green, blue;

  uint8_t index;
} VTermColor;

/**
 * Constructs a new VTermColor instance representing the given RGB values.
 */
void vterm_color_rgb(VTermColor *col, uint8_t red, uint8_t green, uint8_t blue);

/**
 * Construct a new VTermColor instance representing an indexed color with the
 * given index.
 */
void vterm_color_indexed(VTermColor *col, uint8_t idx);

/**
 * Compares two colours. Returns true if the colors are equal, false otherwise.
 */
int vterm_color_is_equal(const VTermColor *a, const VTermColor *b);

typedef enum {
  /* VTERM_VALUETYPE_NONE = 0 */
  VTERM_VALUETYPE_BOOL = 1,
  VTERM_VALUETYPE_INT,
  VTERM_VALUETYPE_STRING,
  VTERM_VALUETYPE_COLOR,

  VTERM_N_VALUETYPES
} VTermValueType;

typedef struct {
  const char *str;
  size_t      len : 30;
  unsigned int  initial : 1;
  unsigned int  final : 1;
} VTermStringFragment;

typedef union {
  int boolean;
  int number;
  VTermStringFragment string;
  VTermColor color;
} VTermValue;

typedef enum {
  /* VTERM_ATTR_NONE = 0 */
  VTERM_ATTR_BOLD = 1,   // bool:   1, 22
  VTERM_ATTR_UNDERLINE,  // number: 4, 21, 24
  VTERM_ATTR_ITALIC,     // bool:   3, 23
  VTERM_ATTR_BLINK,      // bool:   5, 25
  VTERM_ATTR_REVERSE,    // bool:   7, 27
  VTERM_ATTR_CONCEAL,    // bool:   8, 28
  VTERM_ATTR_STRIKE,     // bool:   9, 29
  VTERM_ATTR_FONT,       // number: 10-19
  VTERM_ATTR_FOREGROUND, // color:  30-39 90-97
  VTERM_ATTR_BACKGROUND, // color:  40-49 100-107

  VTERM_N_ATTRS
} VTermAttr;

typedef enum {
  /* VTERM_PROP_NONE = 0 */
  VTERM_PROP_CURSORVISIBLE = 1, // bool
  VTERM_PROP_CURSORBLINK,       // bool
  VTERM_PROP_ALTSCREEN,         // bool
  VTERM_PROP_TITLE,             // string
  VTERM_PROP_ICONNAME,          // string
  VTERM_PROP_REVERSE,           // bool
  VTERM_PROP_CURSORSHAPE,       // number
  VTERM_PROP_MOUSE,             // number
  VTERM_PROP_CURSORCOLOR,       // string

  VTERM_N_PROPS
} VTermProp;

enum {
  VTERM_PROP_CURSORSHAPE_BLOCK = 1,
  VTERM_PROP_CURSORSHAPE_UNDERLINE,
  VTERM_PROP_CURSORSHAPE_BAR_LEFT,

  VTERM_N_PROP_CURSORSHAPES
};

enum {
  VTERM_PROP_MOUSE_NONE = 0,
  VTERM_PROP_MOUSE_CLICK,
  VTERM_PROP_MOUSE_DRAG,
  VTERM_PROP_MOUSE_MOVE,

  VTERM_N_PROP_MOUSES
};

typedef struct {
  const uint32_t *chars;
  int             width;
  unsigned int    protected_cell:1;  /* DECSCA-protected against DECSEL/DECSED */
  unsigned int    dwl:1;             /* DECDWL or DECDHL double-width line */
  unsigned int    dhl:2;             /* DECDHL double-height line (1=top 2=bottom) */
} VTermGlyphInfo;

typedef struct {
  unsigned int    doublewidth:1;     /* DECDWL or DECDHL line */
  unsigned int    doubleheight:2;    /* DECDHL line (1=top 2=bottom) */
  unsigned int    continuation:1;    /* Line is a flow continuation of the previous */
} VTermLineInfo;

/* Copies of VTermState fields that the 'resize' callback might have reason to
 * edit. 'resize' callback gets total control of these fields and may
 * free-and-reallocate them if required. They will be copied back from the
 * struct after the callback has returned.
 */
typedef struct {
  VTermPos pos;                /* current cursor position */
} VTermStateFields;

typedef struct {
  /* libvterm relies on this memory to be zeroed out before it is returned
   * by the allocator. */
  void *(*malloc)(size_t size, void *allocdata);
  void  (*free)(void *ptr, void *allocdata);
} VTermAllocatorFunctions;

void vterm_check_version(int major, int minor);

// Allocate and initialize a new terminal with default allocators.
VTerm *vterm_new(int rows, int cols);

// Allocate and initialize a new terminal with specified allocators.
VTerm *vterm_new_with_allocator(int rows, int cols, VTermAllocatorFunctions *funcs, void *allocdata);

// Free and cleanup a terminal and all its data.
void   vterm_free(VTerm* vt);

// Get the current size of the terminal and store in "rowsp" and "colsp".
void vterm_get_size(const VTerm *vt, int *rowsp, int *colsp);

void vterm_set_size(VTerm *vt, int rows, int cols);

int  vterm_get_utf8(const VTerm *vt);
void vterm_set_utf8(VTerm *vt, int is_utf8);

size_t vterm_input_write(VTerm *vt, const char *bytes, size_t len);

/* Setting output callback will override the buffer logic */
typedef void VTermOutputCallback(const char *s, size_t len, void *user);
void vterm_output_set_callback(VTerm *