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eterm/src/screen.h

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/*--------------------------------*-C-*---------------------------------*
* File: screen.h
*
* This module is all new by Robert Nation
* <nation@rocket.sanders.lockheed.com>
*
* Additional modifications by mj olesen <olesen@me.QueensU.CA>
* No additional restrictions are applied.
*
* As usual, the author accepts no responsibility for anything, nor does
* he guarantee anything whatsoever.
*----------------------------------------------------------------------*/
#ifndef _SCREEN_H
#define _SCREEN_H
#include <X11/Xfuncproto.h>
#include "startup.h"
/************ Macros and Definitions ************/
#define WRAP_CHAR (MAX_COLS + 1)
#define PROP_SIZE 4096
#define TABSIZE 8 /* default tab size */
#define ZERO_SCROLLBACK do { \
D_SCREEN(("ZERO_SCROLLBACK()\n")); \
if (Options & Opt_homeOnEcho) TermWin.view_start = 0; \
} while (0)
#define REFRESH_ZERO_SCROLLBACK do { \
D_SCREEN(("REFRESH_ZERO_SCROLLBACK()\n")); \
if (Options & Opt_homeOnRefresh) TermWin.view_start = 0; \
} while (0)
#define CHECK_SELECTION do { \
if (selection.op) selection_check(); \
} while (0)
#define CLEAR_SELECTION (selection.beg.row = selection.beg.col = selection.end.row = selection.end.col = 0)
#define CLEAR_ALL_SELECTION (selection.beg.row = selection.beg.col = selection.mark.row = selection.mark.col = selection.end.row = selection.end.col = 0)
#define scr_touch() scr_expose(0, 0, TermWin.width, TermWin.height)
/*
* CLEAR_ROWS : clear <num> rows starting from row <row>
* CLEAR_CHARS: clear <num> chars starting from pixel position <x,y>
* ERASE_ROWS : set <num> rows starting from row <row> to the foreground color
*/
#define drawBuffer (TermWin.vt)
#define CLEAR_ROWS(row, num) do { \
XClearArea(Xdisplay, drawBuffer, Col2Pixel(0), Row2Pixel(row), \
TermWin.width, Height2Pixel(num), 0); \
} while (0)
#define CLEAR_CHARS(x, y, num) do { \
D_SCREEN(("CLEAR_CHARS(%d, %d, %d)\n", x, y, num)); \
XClearArea(Xdisplay, drawBuffer, x, y, Width2Pixel(num), Height2Pixel(1), 0); \
} while (0)
#define FAST_CLEAR_CHARS(x, y, num) do { \
clear_area(Xdisplay, drawBuffer, x, y, Width2Pixel(num), Height2Pixel(1), 0); \
} while (0)
#define ERASE_ROWS(row, num) do { \
XFillRectangle(Xdisplay, drawBuffer, TermWin.gc, Col2Pixel(0), Row2Pixel(row), \
TermWin.width, Height2Pixel(num)); \
} while (0)
/* Screen refresh methods */
#define NO_REFRESH 0 /* Window not visible at all! */
#define FAST_REFRESH (1<<1) /* Fully exposed window */
#define SLOW_REFRESH (1<<2) /* Partially exposed window */
#define SMOOTH_REFRESH (1<<3) /* Do sync'ing to make it smooth */
#define IGNORE 0
#define SAVE 's'
#define RESTORE 'r'
#define REVERT IGNORE
#define INVOKE RESTORE
/* flags for scr_gotorc() */
#define C_RELATIVE 1 /* col movement is relative */
#define R_RELATIVE 2 /* row movement is relative */
#define RELATIVE (R_RELATIVE|C_RELATIVE)
/* modes for scr_insdel_chars(), scr_insdel_lines() */
#define INSERT -1 /* don't change these values */
#define DELETE +1
#define ERASE +2
/* modes for scr_page() - scroll page. used by scrollbar window */
enum {
UP,
DN,
NO_DIR
};
/* arguments for scr_change_screen() */
enum {
PRIMARY,
SECONDARY
};
#define RS_None 0 /* Normal */
#define RS_Cursor 0x01000000u /* cursor location */
#define RS_Select 0x02000000u /* selected text */
#define RS_RVid 0x04000000u /* reverse video */
#define RS_Uline 0x08000000u /* underline */
#define RS_acsFont 0x10000000u /* ACS graphics character set */
#define RS_ukFont 0x20000000u /* UK character set */
#define RS_fontMask (RS_acsFont|RS_ukFont)
#ifdef MULTI_CHARSET
#define RS_multi0 0x40000000u /* only multibyte characters */
#define RS_multi1 0x80000000u /* multibyte 1st byte */
#define RS_multi2 (RS_multi0|RS_multi1) /* multibyte 2nd byte */
#define RS_multiMask (RS_multi0|RS_multi1) /* multibyte mask */
#endif
#define RS_fgMask 0x00001F00u /* 32 colors */
#define RS_Bold 0x00008000u /* bold */
#define RS_bgMask 0x001F0000u /* 32 colors */
#define RS_Blink 0x00800000u /* blink */
#define RS_Dirty 0x00400000u /* forced update of char */
#define RS_attrMask (0xFF000000u|RS_Bold|RS_Blink)
/* how to build & extract colors and attributes */
#define GET_FGCOLOR(r) (((r) & RS_fgMask)>>8)
#define GET_BGCOLOR(r) (((r) & RS_bgMask)>>16)
#define GET_ATTR(r) (((r) & RS_attrMask))
#define GET_BGATTR(r) (((r) & (RS_attrMask | RS_bgMask)))
#define SET_FGCOLOR(r,fg) (((r) & ~RS_fgMask) | ((fg)<<8))
#define SET_BGCOLOR(r,bg) (((r) & ~RS_bgMask) | ((bg)<<16))
#define SET_ATTR(r,a) (((r) & ~RS_attrMask)| (a))
#define DEFAULT_RSTYLE (RS_None | (fgColor<<8) | (bgColor<<16))
/* screen_t flags */
#define Screen_Relative (1<<0) /* relative origin mode flag */
#define Screen_VisibleCursor (1<<1) /* cursor visible? */
#define Screen_Autowrap (1<<2) /* auto-wrap flag */
#define Screen_Insert (1<<3) /* insert mode (vs. overstrike) */
#define Screen_WrapNext (1<<4) /* need to wrap for next char? */
#define Screen_DefaultFlags (Screen_VisibleCursor|Screen_Autowrap)
/************ Structures ************/
typedef unsigned char text_t;
typedef unsigned int rend_t;
typedef struct {
int row, col;
} row_col_t;
/*
* screen accounting:
* screen_t elements
* text: Contains all the text information including the scrollback
* buffer. Each line is length (TermWin.ncol + 1)
* The final character is either the _length_ of the line or
* for wrapped lines: (MAX_COLS + 1)
* rend: Contains rendition information: font, bold, color, etc.
* * Note: Each line for both text and rend are only allocated on demand, and
* text[x] is allocated <=> rend[x] is allocated for all x.
* row: Cursor row position : 0 <= row < TermWin.nrow
* col: Cursor column position : 0 <= col < TermWin.ncol
* tscroll: Scrolling region top row inclusive : 0 <= row < TermWin.nrow
* bscroll: Scrolling region bottom row inclusive : 0 <= row < TermWin.nrow
*
* selection_t elements
* clicks: 1, 2 or 3 clicks - 4 indicates a special condition of 1 where
* nothing is selected
* beg: row/column of beginning of selection : never past mark
* mark: row/column of initial click : never past end
* end: row/column of end of selection
* * Note: -TermWin.nscrolled <= beg.row <= mark.row <= end.row < TermWin.nrow
* * Note: col == -1 ==> we're left of screen
*
* TermWin.saveLines:
* Maximum number of lines in the scrollback buffer.
* This is fixed for each rxvt instance.
* TermWin.nscrolled:
* Actual number of lines we've used of the scrollback buffer
* 0 <= TermWin.nscrolled <= TermWin.saveLines
* TermWin.view_start:
* Offset back into the scrollback buffer for out current view
* 0 <= TermWin.view_start <= TermWin.nscrolled
*
* Layout of text/rend information in the screen_t text/rend structures:
* Rows [0] ... [TermWin.saveLines - 1]
* scrollback region : we're only here if TermWin.view_start != 0
* Rows [TermWin.saveLines] ... [TermWin.saveLines + TermWin.nrow - 1]
* normal `unscrolled' screen region
*/
typedef struct {
text_t **text; /* _all_ the text */
rend_t **rend; /* rendition, uses RS_ flags */
short row, /* cursor row on the screen */
col; /* cursor column on the screen */
short tscroll, /* top of settable scroll region */
bscroll; /* bottom of settable scroll region */
short charset; /* character set number [0..3] */
unsigned int flags;
} screen_t;
typedef struct {
short row, /* cursor row */
col, /* cursor column */
charset; /* character set number [0..3] */
char charset_char;
rend_t rstyle; /* rendition style */
} save_t;
typedef struct {
unsigned char *text; /* selected text */
int len; /* length of selected text */
enum {
SELECTION_CLEAR = 0, /* nothing selected */
SELECTION_INIT, /* marked a point */
SELECTION_BEGIN, /* started a selection */
SELECTION_CONT, /* continued selection */
SELECTION_DONE /* selection put in CUT_BUFFER0 */
} op; /* current operation */
short screen; /* screen being used */
short clicks; /* number of clicks */
row_col_t beg, mark, end;
} selection_t;
/************ Variables ************/
#ifndef NO_BRIGHTCOLOR
extern unsigned int colorfgbg;
#endif
/************ Function Prototypes ************/
_XFUNCPROTOBEGIN
extern void blank_dline(text_t *, rend_t *, int, rend_t);
extern void blank_sline(text_t *, rend_t *, int);
extern void make_screen_mem(text_t **, rend_t **, int);
extern void scr_reset(void);
extern void scr_release(void);
extern void scr_poweron(void);
extern void scr_cursor(int);
extern int scr_change_screen(int);
extern void scr_color(unsigned int, unsigned int);
extern void scr_rendition(int, int);
extern int scroll_text(int, int, int, int);
extern void scr_add_lines(const unsigned char *, int, int);
extern void scr_backspace(void);
extern void scr_tab(int);
extern void scr_gotorc(int, int, int);
extern void scr_index(int);
extern void scr_erase_line(int);
extern void scr_erase_screen(int);
extern void scr_E(void);
extern void scr_insdel_lines(int, int);
extern void scr_insdel_chars(int, int);
extern void scr_scroll_region(int, int);
extern void scr_cursor_visible(int);
extern void scr_autowrap(int);
extern void scr_relative_origin(int);
extern void scr_insert_mode(int);
extern void scr_set_tab(int);
extern void scr_rvideo_mode(int);
extern void scr_report_position(void);
extern void set_font_style(void);
extern void scr_charset_choose(int);
extern void scr_charset_set(int, unsigned int);
extern void set_multichar_encoding(const char *);
extern int scr_get_fgcolor(void);
extern int scr_get_bgcolor(void);
extern void scr_expose(int, int, int, int);
extern int scr_move_to(int, int);
extern int scr_page(int, int);
extern void scr_bell(void);
extern void scr_printscreen(int);
extern void scr_refresh(int);
extern void selection_check(void);
extern void PasteIt(unsigned char *, unsigned int);
extern void selection_paste(Window, unsigned, int);
extern void selection_request(Time, int, int);
extern void selection_reset(void);
extern void selection_clear(void);
extern void selection_setclr(int, int, int, int, int);
extern void selection_start(int, int);
extern void selection_start_colrow(int, int);
extern void selection_make(Time);
extern void selection_click(int, int, int);
extern void selection_delimit_word(int, int, row_col_t *, row_col_t *);
extern void selection_extend(int, int, int);
extern void selection_extend_colrow(int, int, int, int);
extern void selection_rotate(int, int);
extern void selection_send(XSelectionRequestEvent *);
extern void mouse_report(XButtonEvent *);
extern void mouse_tracking(int, int, int, int, int);
extern void debug_PasteIt(unsigned char *, int);
extern int debug_selection(void);
extern void debug_colors(void);
_XFUNCPROTOEND
#endif
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