79 lines
3.1 KiB
C
79 lines
3.1 KiB
C
/* display.h -- How the display in Info is done.
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$Id: display.h,v 1.3 2004/04/11 17:56:45 karl Exp $
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This file is part of GNU Info, a program for reading online documentation
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stored in Info format.
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Copyright (C) 1993, 1997, 2004 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Written by Brian Fox (bfox@ai.mit.edu). */
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#ifndef INFO_DISPLAY_H
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#define INFO_DISPLAY_H
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#include "info-utils.h"
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#include "terminal.h"
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typedef struct {
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char *text; /* Text of the line as it appears. */
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int textlen; /* Printable Length of TEXT. */
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int inverse; /* Non-zero means this line is inverse. */
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} DISPLAY_LINE;
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/* An array of display lines which tell us what is currently visible on
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the display. */
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extern DISPLAY_LINE **the_display;
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/* Non-zero means do no output. */
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extern int display_inhibited;
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/* Non-zero if we didn't completely redisplay a window. */
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extern int display_was_interrupted_p;
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/* Initialize THE_DISPLAY to WIDTH and HEIGHT, with nothing in it. */
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extern void display_initialize_display (int width, int height);
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/* Clear all of the lines in DISPLAY making the screen blank. */
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extern void display_clear_display (DISPLAY_LINE **display);
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/* Update the windows pointed to by WINDOWS in THE_DISPLAY. This actually
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writes the text on the screen. */
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extern void display_update_display (WINDOW *window);
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/* Display WIN on THE_DISPLAY. Unlike display_update_display (), this
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function only does one window. */
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extern void display_update_one_window (WINDOW *win);
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/* Move the screen cursor to directly over the current character in WINDOW. */
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extern void display_cursor_at_point (WINDOW *window);
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/* Scroll the region of the_display starting at START, ending at END, and
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moving the lines AMOUNT lines. If AMOUNT is less than zero, the lines
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are moved up in the screen, otherwise down. Actually, it is possible
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for no scrolling to take place in the case that the terminal doesn't
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support it. This doesn't matter to us. */
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extern void display_scroll_display (int start, int end, int amount);
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/* Try to scroll lines in WINDOW. OLD_PAGETOP is the pagetop of WINDOW before
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having had its line starts recalculated. OLD_STARTS is the list of line
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starts that used to appear in this window. OLD_COUNT is the number of lines
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that appear in the OLD_STARTS array. */
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extern void display_scroll_line_starts (WINDOW *window, int old_pagetop,
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char **old_starts, int old_count);
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#endif /* not INFO_DISPLAY_H */
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