| 1 | /* display.h -- How the display in Info is done.
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| 2 | $Id: display.h,v 1.3 2004/04/11 17:56:45 karl Exp $
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| 3 |
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| 4 | This file is part of GNU Info, a program for reading online documentation
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| 5 | stored in Info format.
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| 6 |
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| 7 | Copyright (C) 1993, 1997, 2004 Free Software Foundation, Inc.
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| 8 |
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| 9 | This program is free software; you can redistribute it and/or modify
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| 10 | it under the terms of the GNU General Public License as published by
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| 11 | the Free Software Foundation; either version 2, or (at your option)
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| 12 | any later version.
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| 13 |
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| 14 | This program is distributed in the hope that it will be useful,
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| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 17 | GNU General Public License for more details.
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| 18 |
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| 19 | You should have received a copy of the GNU General Public License
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| 20 | along with this program; if not, write to the Free Software
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| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 22 |
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| 23 | Written by Brian Fox (bfox@ai.mit.edu). */
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| 24 |
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| 25 | #ifndef INFO_DISPLAY_H
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| 26 | #define INFO_DISPLAY_H
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| 27 |
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| 28 | #include "info-utils.h"
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| 29 | #include "terminal.h"
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| 30 |
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| 31 | typedef struct {
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| 32 | char *text; /* Text of the line as it appears. */
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| 33 | int textlen; /* Printable Length of TEXT. */
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| 34 | int inverse; /* Non-zero means this line is inverse. */
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| 35 | } DISPLAY_LINE;
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| 36 |
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| 37 | /* An array of display lines which tell us what is currently visible on
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| 38 | the display. */
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| 39 | extern DISPLAY_LINE **the_display;
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| 40 |
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| 41 | /* Non-zero means do no output. */
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| 42 | extern int display_inhibited;
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| 43 |
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| 44 | /* Non-zero if we didn't completely redisplay a window. */
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| 45 | extern int display_was_interrupted_p;
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| 46 |
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| 47 | /* Initialize THE_DISPLAY to WIDTH and HEIGHT, with nothing in it. */
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| 48 | extern void display_initialize_display (int width, int height);
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| 49 |
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| 50 | /* Clear all of the lines in DISPLAY making the screen blank. */
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| 51 | extern void display_clear_display (DISPLAY_LINE **display);
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| 52 |
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| 53 | /* Update the windows pointed to by WINDOWS in THE_DISPLAY. This actually
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| 54 | writes the text on the screen. */
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| 55 | extern void display_update_display (WINDOW *window);
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| 56 |
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| 57 | /* Display WIN on THE_DISPLAY. Unlike display_update_display (), this
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| 58 | function only does one window. */
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| 59 | extern void display_update_one_window (WINDOW *win);
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| 60 |
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| 61 | /* Move the screen cursor to directly over the current character in WINDOW. */
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| 62 | extern void display_cursor_at_point (WINDOW *window);
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| 63 |
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| 64 | /* Scroll the region of the_display starting at START, ending at END, and
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| 65 | moving the lines AMOUNT lines. If AMOUNT is less than zero, the lines
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| 66 | are moved up in the screen, otherwise down. Actually, it is possible
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| 67 | for no scrolling to take place in the case that the terminal doesn't
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| 68 | support it. This doesn't matter to us. */
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| 69 | extern void display_scroll_display (int start, int end, int amount);
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| 70 |
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| 71 | /* Try to scroll lines in WINDOW. OLD_PAGETOP is the pagetop of WINDOW before
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| 72 | having had its line starts recalculated. OLD_STARTS is the list of line
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| 73 | starts that used to appear in this window. OLD_COUNT is the number of lines
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| 74 | that appear in the OLD_STARTS array. */
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| 75 | extern void display_scroll_line_starts (WINDOW *window, int old_pagetop,
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| 76 | char **old_starts, int old_count);
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| 77 |
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| 78 | #endif /* not INFO_DISPLAY_H */
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