From 31fbfe9bebb8e48eaf39efc88875c743cf238ced Mon Sep 17 00:00:00 2001 From: gclarkii Date: Tue, 13 Sep 1994 13:51:34 +0000 Subject: Import of GNU Info 3.0 in bmake format --- gnu/usr.bin/texinfo/info/window.h | 229 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 229 insertions(+) create mode 100644 gnu/usr.bin/texinfo/info/window.h (limited to 'gnu/usr.bin/texinfo/info/window.h') diff --git a/gnu/usr.bin/texinfo/info/window.h b/gnu/usr.bin/texinfo/info/window.h new file mode 100644 index 0000000..3e82570 --- /dev/null +++ b/gnu/usr.bin/texinfo/info/window.h @@ -0,0 +1,229 @@ +/* window.h -- Structure and flags used in manipulating Info windows. */ + +/* This file is part of GNU Info, a program for reading online documentation + stored in Info format. + + Copyright (C) 1993 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + Written by Brian Fox (bfox@ai.mit.edu). */ + +#ifndef _WINDOW_H_ +#define _WINDOW_H_ + +#include "nodes.h" +#include "infomap.h" + +/* Smallest number of visible lines in a window. The actual height is + always one more than this number because each window has a modeline. */ +#define WINDOW_MIN_HEIGHT 2 + +/* Smallest number of screen lines that can be used to fully present a + window. This number includes the modeline of the window. */ +#define WINDOW_MIN_SIZE (WINDOW_MIN_HEIGHT + 1) + +/* The exact same elements are used within the WINDOW_STATE structure and a + subsection of the WINDOW structure. We could define a structure which + contains this elements, and include that structure in each of WINDOW_STATE + and WINDOW. But that would lead references in the code such as + window->state->node which we would like to avoid. Instead, we #define the + elements here, and simply include the define in both data structures. Thus, + if you need to change window state information, here is where you would + do it. NB> The last element does NOT end with a semi-colon. */ +#define WINDOW_STATE_DECL \ + NODE *node; /* The node displayed in this window. */ \ + int pagetop; /* LINE_STARTS[PAGETOP] is first line in WINDOW. */ \ + long point /* Offset within NODE of the cursor position. */ + +/* Structure which defines a window. Windows are doubly linked, next + and prev. The list of windows is kept on WINDOWS. The structure member + window->height is the total height of the window. The position location + (0, window->height + window->first_row) is the first character of this + windows modeline. The number of lines that can be displayed in a window + is equal to window->height - 1. */ +typedef struct __window__ { + struct __window__ *next; /* Next window in this chain. */ + struct __window__ *prev; /* Previous window in this chain. */ + int width; /* Width of this window. */ + int height; /* Height of this window. */ + int first_row; /* Offset of the first line in the_screen. */ + int goal_column; /* The column we would like the cursor to appear in. */ + Keymap keymap; /* Keymap used to read commands in this window. */ + WINDOW_STATE_DECL; /* Node, pagetop and point. */ + char *modeline; /* Calculated text of the modeline for this window. */ + char **line_starts; /* Array of printed line starts for this node. */ + int line_count; /* Number of lines appearing in LINE_STARTS. */ + int flags; /* See below for details. */ +} WINDOW; + +typedef struct { + WINDOW_STATE_DECL; /* What gets saved. */ +} WINDOW_STATE; + +#define W_UpdateWindow 0x01 /* WINDOW needs updating. */ +#define W_WindowIsPerm 0x02 /* This WINDOW is a permanent object. */ +#define W_WindowVisible 0x04 /* This WINDOW is currently visible. */ +#define W_InhibitMode 0x08 /* This WINDOW has no modeline. */ +#define W_NoWrap 0x10 /* Lines do not wrap in this window. */ +#define W_InputWindow 0x20 /* Window accepts input. */ +#define W_TempWindow 0x40 /* Window is less important. */ + +extern WINDOW *windows; /* List of visible Info windows. */ +extern WINDOW *active_window; /* The currently active window. */ +extern WINDOW *the_screen; /* The Info screen is just another window. */ +extern WINDOW *the_echo_area; /* THE_ECHO_AREA is a window in THE_SCREEN. */ + +/* Global variable control redisplay of scrolled windows. If non-zero, it + is the desired number of lines to scroll the window in order to make + point visible. A user might set this to 1 for smooth scrolling. If + set to zero, the line containing point is centered within the window. */ +extern int window_scroll_step; + + /* Make the modeline member for WINDOW. */ +extern void window_make_modeline (); + +/* Initalize the window system by creating THE_SCREEN and THE_ECHO_AREA. + Create the first window ever, and make it permanent. + You pass WIDTH and HEIGHT; the dimensions of the total screen size. */ +extern void window_initialize_windows (); + +/* Make a new window showing NODE, and return that window structure. + The new window is made to be the active window. If NODE is passed + as NULL, then show the node showing in the active window. If the + window could not be made return a NULL pointer. The active window + is not changed.*/ +extern WINDOW *window_make_window (); + +/* Delete WINDOW from the list of known windows. If this window was the + active window, make the next window in the chain be the active window, + or the previous window in the chain if there is no next window. */ +extern void window_delete_window (); + +/* A function to call when the screen changes size, and some windows have + to get deleted. The function is called with the window to be deleted + as an argument, and it can't do anything about the window getting deleted; + it can only clean up dangling references to that window. */ +extern VFunction *window_deletion_notifier; + +/* Set WINDOW to display NODE. */ +extern void window_set_node_of_window (); + +/* Tell the window system that the size of the screen has changed. This + causes lots of interesting things to happen. The permanent windows + are resized, as well as every visible window. You pass WIDTH and HEIGHT; + the dimensions of the total screen size. */ +extern void window_new_screen_size (); + +/* Change the height of WINDOW by AMOUNT. This also automagically adjusts + the previous and next windows in the chain. If there is only one user + window, then no change takes place. */ +extern void window_change_window_height (); + +/* Adjust the pagetop of WINDOW such that the cursor point will be visible. */ +extern void window_adjust_pagetop (); + +/* Tile all of the windows currently displayed in the global variable + WINDOWS. If argument DO_INTERNALS is non-zero, tile windows displaying + internal nodes as well. */ +#define DONT_TILE_INTERNALS 0 +#define TILE_INTERNALS 1 +extern void window_tile_windows (); + +/* Toggle the state of line wrapping in WINDOW. This can do a bit of fancy + redisplay. */ +extern void window_toggle_wrap (); + +/* For every window in CHAIN, set the flags member to have FLAG set. */ +extern void window_mark_chain (); + +/* For every window in CHAIN, clear the flags member of FLAG. */ +extern void window_unmark_chain (); + +/* Make WINDOW start displaying at PERCENT percentage of its node. */ +extern void window_goto_percentage (); + +/* Build a new node which has FORMAT printed with ARG1 and ARG2 as the + contents. */ +extern NODE *build_message_node (); + +/* Useful functions can be called from outside of window.c. */ +extern void initialize_message_buffer (); + +/* Print FORMAT with ARG1,2 to the end of the current message buffer. */ +extern void printf_to_message_buffer (); + +/* Convert the contents of the message buffer to a node. */ +extern NODE *message_buffer_to_node (); + +/* Return the length of the most recently printed line in message buffer. */ +extern int message_buffer_length_this_line (); + +/* Pad STRING to COUNT characters by inserting blanks. */ +extern int pad_to (); + +/* Make a message appear in the echo area, built from FORMAT, ARG1 and ARG2. + The arguments are treated similar to printf () arguments, but not all of + printf () hair is present. The message appears immediately. If there was + already a message appearing in the echo area, it is removed. */ +extern void window_message_in_echo_area (); + +/* Place a temporary message in the echo area built from FORMAT, ARG1 + and ARG2. The message appears immediately, but does not destroy + any existing message. A future call to unmessage_in_echo_area () + restores the old contents. */ +extern void message_in_echo_area (); +extern void unmessage_in_echo_area (); + +/* Clear the echo area, removing any message that is already present. + The echo area is cleared immediately. */ +extern void window_clear_echo_area (); + +/* Quickly guess the approximate number of lines to that NODE would + take to display. This really only counts carriage returns. */ +extern int window_physical_lines (); + +/* Calculate a list of line starts for the node belonging to WINDOW. The line + starts are pointers to the actual text within WINDOW->NODE. */ +extern void calculate_line_starts (); + +/* Given WINDOW, recalculate the line starts for the node it displays. */ +extern void recalculate_line_starts (); + +/* Return the number of characters it takes to display CHARACTER on the + screen at HPOS. */ +extern int character_width (); + +/* Return the number of characters it takes to display STRING on the + screen at HPOS. */ +extern int string_width (); + +/* Return the index of the line containing point. */ +extern int window_line_of_point (); + +/* Get and return the goal column for this window. */ +extern int window_get_goal_column (); + +/* Get and return the printed column offset of the cursor in this window. */ +extern int window_get_cursor_column (); + +/* Get and Set the node, pagetop, and point of WINDOW. */ +extern void window_get_state (), window_set_state (); + +/* Count the number of characters in LINE that precede the printed column + offset of GOAL. */ +extern int window_chars_to_goal (); + +#endif /* !_WINDOW_H_ */ -- cgit v1.1