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