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include "display/curses.h"
include "screen.h"
define MAXSCR 10
define MIN_HEIGHT 4
# COUNT_WINDOW -- Return number of windows
int procedure count_window ()
#--
include "window.com"
begin
return (nscreens)
end
# FOCUS_WINDOW -- Move the cursor to its current position in a window
procedure focus_window (win)
pointer win # i: window descriptor
#--
int row, col
int winstat()
begin
row = winstat (win, W_CURROW)
col = winstat (win, W_CURCOL)
call wmove (win, row, col)
end
# GET_WINDOW -- Get a window from the list of screens
int procedure get_window (iscr, scr)
int iscr # i: index into list of screens
pointer scr # o: screen descriptor
#--
include "window.com"
begin
# Return EOF if this is the last screen on the list
if (iscr > nscreens) {
scr = scrlist[1]
return (EOF)
} else {
scr = scrlist[iscr]
return (OK)
}
end
# INIT_WINDOW -- Create the initial set of windows
procedure init_window (scr)
pointer scr # o: initial screen
#--
include "window.com"
int nrows, ncols
int newwin()
begin
# Get size of terminal screen
call wdimen (STDSCR, nrows, ncols)
# Create the initial screen
call malloc (scr, TED_SCRLEN, TY_STRUCT)
TED_WINDOW(scr) = newwin (nrows-2, ncols, 1, 1)
TED_TABLE(scr) = NULL
# Create the prompt window
wprompt = newwin (2, ncols, nrows-1, 1)
# Initialze the global variables
nscreens = 1
scrlist[1] = scr
end
# JOIN_WINDOW -- Join screen window with the adjacent window
procedure join_window (scr)
pointer scr # i: screen descriptor
#--
include "window.com"
int win1, win2
int iscr, jscr, top, left, row1, col1, row2, col2
pointer scr2
string notnull "join_window: table was not closed"
string notfound "join_window: could not find screen"
int winstat(), newwin()
begin
# Cannot join single screen or screen that is still open
if (nscreens == 1 || TED_TABLE(scr) != NULL)
call err1_prompt (notnull)
# Find the screen and its adjacent screen
# Pay attention to which screen is on top
jscr = 0
do iscr = 1, nscreens {
if (scrlist[iscr] == scr) {
jscr = iscr
if (jscr == 1) {
win1 = TED_WINDOW(scrlist[1])
win2 = TED_WINDOW(scrlist[2])
scr2 = scrlist[2]
} else {
win1 = TED_WINDOW(scrlist[jscr-1])
win2 = TED_WINDOW(scrlist[jscr])
scr2 = scrlist[jscr-1]
}
break
}
}
if (jscr == 0) {
call err1_prompt (notfound)
} else {
# Get dimensions of windows, delete them
top = winstat (win1, W_TOP)
left = winstat (win1, W_LEFT)
call wdimen (win1, row1, col1)
call delwin (win1)
call wdimen (win2, row2, col2)
call delwin (win2)
# Create new window, assign to adjacent screen
TED_WINDOW(scr2) = newwin (row1+row2, col2, top, left)
# Delete screen and remove from list of screens
call mfree (scr, TY_STRUCT)
nscreens = nscreens - 1
do iscr= jscr, nscreens
scrlist[iscr] = scrlist[iscr+1]
}
end
# PROMPT_WINDOW -- Return the prompt window
int procedure prompt_window ()
#--
include "window.com"
begin
return (wprompt)
end
# SPLIT_WINDOW -- Split window into two windows
procedure split_window (scr1, scr2)
pointer scr1 # u: current screen
pointer scr2 # o: new screen (or NULL)
#--
include "window.com"
int win1
int iscr, jscr, top, left, row1, col1, row2, col2
string noroom "Screen is too small to split"
string notfound "split_window: could not find screen"
int winstat(), newwin()
begin
# Find screen in list of screens
jscr = 0
do iscr = 1, nscreens {
if (scr1 == scrlist[iscr]) {
jscr = iscr
break
}
}
if (jscr == 0) {
call err1_prompt (notfound)
} else {
# Get dimensions of current window
win1 = TED_WINDOW(scr1)
top = winstat (win1, W_TOP)
left = winstat (win1, W_LEFT)
call wdimen (win1, row1, col1)
row2 = row1 / 2
col2 = col1
row1 = row1 - row2
# Don't split window if it is too small
if (row2 <= MIN_HEIGHT) {
call warn1_prompt (scr1, noroom)
scr2 = NULL
} else {
# Delete current window and create new half-size window
call delwin (win1)
TED_WINDOW(scr1) = newwin (row1, col1, top, left)
# Create new screen and its window
call malloc (scr2, TED_SCRLEN, TY_STRUCT)
TED_WINDOW(scr2) = newwin (row2, col2, top+row1, left)
TED_TABLE(scr2) = NULL
# Add to list of screens
do iscr = jscr+1, nscreens
scrlist[iscr+1] = scrlist[iscr]
scrlist[jscr+1] = scr2
nscreens = nscreens + 1
}
}
end
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