/* Copyright (C) 2001-2020 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
*/


/* Text Window class */

#ifndef dwtext_INCLUDED
#  define dwtext_INCLUDED

#ifdef _WINDOWS
#define _Windows
#endif

#define UNICODE

#include "windows_.h"

#undef UNICODE

typedef struct TEXTWINDOW_S {
    const char *Title;		/* required */
    wchar_t *TitleW;             /* required */
    HICON hIcon;		/* optional */
    wchar_t *ScreenBuffer;
    POINT ScreenSize;		/* optional */
    char *DragPre;		/* optional */
    char *DragPost;		/* optional */
    int nCmdShow;		/* optional */

    HWND hwnd;

    BYTE *KeyBuf;
    BYTE *KeyBufIn;
    BYTE *KeyBufOut;
    unsigned int KeyBufSize;
    BOOL quitnow;

    char line_buf[256];
    int line_end;
    int line_start;
    BOOL line_complete;
    BOOL line_eof;

    BOOL bFocus;
    BOOL bGetCh;

    char *fontname;	/* font name */
    int fontsize;	/* font size in pts */

    HFONT hfont;
    int CharAscent;

    int CaretHeight;
    int CursorFlag;
    POINT CursorPos;
    POINT ClientSize;
    POINT CharSize;
    POINT ScrollPos;
    POINT ScrollMax;

    int x, y, cx, cy;	/* window position */
    int utf8shift;
    TCHAR** szFiles;
    int cFiles;
} TW;

/* Create new TW structure */
TW *text_new(void);

/* Destroy window and TW structure */
void text_destroy(TW *tw);

/* test if a key has been pressed
 * return TRUE if key hit
 * return FALSE if no key
 */
int text_kbhit(TW *tw);

/* Get a character from the keyboard, waiting if necessary */
int getch(void);

/* Get a line from the keyboard
 * store line in buf, with no more than len characters
 * including null character
 * return number of characters read
 */
int text_gets(TW *tw, char *buf, int len);

/* Get a line from the keyboard
 * store line in buf, with no more than len characters
 * line is not null terminated
 * return number of characters read
 */
int text_read_line(TW *tw, char *buf, int len);

/* Put a character to the window */
int text_putch(TW *tw, int ch);

/* Write cnt character from buf to the window */
void text_write_buf(TW *tw, const char *buf, int cnt);

/* Put a string to the window */
void text_puts(TW *tw, const char *str);

/* Scroll window to make cursor visible */
void text_to_cursor(TW *tw);

/* register window class */
int text_register_class(TW *tw, HICON hicon);

/* Create and show window with given name and min/max/normal state */
/* return 0 on success, non-zero on error */
int text_create(TW *tw, const char *title, int cmdShow);

/* Set window font and size */
/* a must choose monospaced */
void text_font(TW *tw, const char *fontname, int fontsize);

/* Set screen size in characters */
void text_size(TW *tw, int width, int height);

/* Set and get the window position and size */
void text_setpos(TW *tw, int x, int y, int cx, int cy);
int text_getpos(TW *tw, int *px, int *py, int *pcx, int *pcy);

/* Set pre drag and post drag strings
 * If a file is dropped on the window, the following will
 * be poked into the keyboard buffer:
 *   the pre_drag string
 *   the file name
 *   the post_drag string
 */
void text_drag(TW *tw, const char *pre_drag, const char *post_drag);

/* Clear the list of files/paths from the drag and drop stuff */
void
text_clear_drag_and_drop_list(TW* tw, int freelist);

/* provide access to window handle */
HWND text_get_handle(TW *tw);

/* ================================== */

#endif /* dwtext_INCLUDED */
