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mp_tui.mpsl
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mp_tui.mpsl
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/*
Minimum Profit - A Text Editor
Text User Interface.
Angel Ortega <angel@triptico.com> et al.
This software is released into the public domain.
NO WARRANTY. See file LICENSE for details.
*/
/* main TUI namespace */
mp.tui = {};
/** colors **/
mp.colors.menu = {
text: [ 'white', 'blue' ],
gui: [ 0xffffff, 0x0000aa ],
flags: [ 'bright' ]
};
/** code **/
sub mp.tui.prompt(prompt, y)
/* draw a prompt on screen */
{
/* no y? default to last line */
if (y == NULL)
y = mp.window.ty;
/* delete all possible newlines */
prompt = sregex(prompt, "/\n/g", ' ');
mp.tui.attr(mp.colors.menu.attr);
mp.tui.move(0, y, 1);
mp.tui.addstr(prompt);
mp.tui.attr(mp.colors.normal.attr);
mp.tui.refresh();
}
sub mp.tui.readline(prompt, history, default, flags)
/* the readline function, with special functionality in 'flags' */
{
local c, r, h, i, x;
mp.tui.prompt(prompt + ' ', flags.y);
c = mp.tui.getxy();
r = default || '';
/* get the history stack */
if (history)
h = mp.get_history(history);
i = 0;
x = size(r);
/* store in c[2] the usable size */
push(c, mp.window.tx - c[0] - 1);
for (;;) {
local s = r;
local v = 0;
/* is the string bigger than the usable size? */
if (size(r) >= c[2]) {
/* if x is beyond the usable size,
cut from the start */
if (x >= c[2])
v = x - c[2];
s = slice(s, v, c[2]);
}
/* if it's a password, change everything to asterisks */
if (flags.password)
s = sregex(s, '/./g', flags.password);
/* draws the string */
mp.tui.move(c[0], c[1], 1);
mp.tui.addstr(s);
mp.tui.move(c[0] + x - v, c[1]);
mp.tui.refresh();
local k = mp.tui.getkey();
if (k == 'space')
k = ' ';
if (k == 'enter')
break;
else
if (k == 'escape') {
r = NULL;
break;
}
else
if (k == 'backspace' && x > 0) {
x -= 1;
r = splice(r, NULL, x, 1);
}
else
if(k == 'delete') {
r = splice(r, NULL, x, 1);
}
else
if (k == 'ctrl-u') {
x = 0;
r = '';
}
else
if (k == 'ctrl-v' && size(mp.clipboard)) {
r = splice(r, mp.clipboard[0], x, 0);
x = x + size(mp.clipboard[0]);
}
else
if (k == 'ctrl-k') {
r = splice(r, NULL, x, -1);
}
else
if (k == 'cursor-up' && size(h)) {
i -= 1;
r = h[i % size(h)];
x = size(r);
}
else
if (k == 'cursor-down' && size(h)) {
i += 1;
r = h[i % size(h)];
x = size(r);
}
else
if (k == 'cursor-left' && x > 0) {
x -= 1;
}
else
if (k == 'cursor-right' && x < size(r)) {
x += 1;
}
else
if (k == 'home') {
x = 0;
}
else
if (k == 'end') {
x = size(r);
}
else
if (k == 'insert-raw-string') {
r = splice(r, mp.raw_string, x, 0);
x += 1;
}
else
if (k == 'tab' && flags.file) {
if (regex(r, '/^~/') && ENV['HOME']) {
r = sregex(r, '/^~/', ENV['HOME']);
}
local done = 0;
while (!done) {
local l = glob(r + '*');
if (size(l)) {
ins(l, '../', 0);
local p = mp.tui.list(prompt, l, 2, { 'split_entry' => 1 });
if (p == NULL) {
r = NULL;
done = 1;
}
else {
/* If in a subdirectory, we need to walk only one path up only and not to '../' */
if (p == 0) {
local segment = split(r, '/');
/* Remove last slash's empty value */
pop(segment);
/* Walk up one item */
if (size(segment) > 0) pop(segment);
if (size(segment) == 0) {
if (r[0] == '/') segment = ['/'];
else {
segment = split(getenv('PWD'), '/');
}
}
r = join(segment, '/') + '/';
}
else {
r = l[p];
/* if it's not a directory, retry */
if (regex(r, '@/$@') == NULL)
done = 1;
}
}
}
else
break;
}
if (done)
break;
}
else
if (size(k) == 1) {
r = splice(r, k, x, 0);
x += 1;
}
}
/* if a string was accepted, store in the history */
if (!flags.password && h != NULL && size(r) && h[-1] != r)
push(h, r);
return r;
}
sub mp.tui.list(prompt, data, pos, flags)
/* select from a list */
{
local vy = 0, ty, hint, last_time, sy, sx = 0, lines = 0, sugc = mp.colors.normal.attr;
/* extract the top left position for the list */
if (flags != NULL && flags.y)
sy = flags.y;
else
sy = 0;
if (flags != NULL && flags.x) {
sx = flags.x;
/* make sure we have enough space to display a medium sized line */
if (sx + 64 > mp.window.tx) {
sx = 0;
}
}
/* compute the end position for the list */
if (flags != NULL && flags.lines) {
/* if it's doesn't fit the complete window, let's display it completely in the window */
if (flags.lines > mp.window.ty) {
sy = 0;
ty = mp.window.ty;
} else {
ty = flags.y + flags.lines + 1;
/* check that it fits the requirement, else move it above the start position */
if (ty > mp.window.ty) {
sy = flags.y - flags.lines - 2;
ty = flags.y - 1;
}
}
}
else
ty = mp.window.ty;
/* draw the prompt if it's provided */
if (prompt != NULL) {
mp.tui.attr(mp.colors.menu.attr);
mp.tui.move(sx, sy, 1);
mp.tui.addstr(prompt);
mp.tui.attr(mp.colors.normal.attr);
sy += 1;
}
if (flags != NULL && flags.color)
sugc = flags.color;
lines = ty - sy;
last_time = 0;
hint = "";
if (pos == NULL)
pos = 0;
for (;;) {
local k, n, cp;
/* limits for pos (in data space) */
if (pos < 0)
pos = 0;
if (pos >= size(data))
pos = size(data) - 1;
/* limits for vy (in data space) */
if (pos < vy)
vy = pos;
if ((vy + lines - 1) <= pos)
vy = pos - lines + 1;
/* draw all the lines */
n = 0;
while (n < lines) {
local l = data[n + vy];
/* no more data? */
if (l == NULL)
break;
if ((n + vy) == pos) {
cp = n;
mp.tui.attr(mp.colors.cursor.attr);
}
else
mp.tui.attr(sugc);
/* split the line by tab in two columns */
local ll = l->split("\t");
local l0 = ll[0];
local l1 = ll[1] || '';
/* draw the first part */
mp.tui.move(sx, sy + n, 1);
mp.tui.addstr(mp.trim(l0, mp.window.tx - count(l1)));
/* draw the middle part */
mp.tui.addstr(map(mp.window.tx - count(l0) - count(l1) - sx, ' ')->join());
/* draw the second part */
mp.tui.addstr(l1);
n += 1;
}
/* clean the rest of lines */
mp.tui.attr(sugc);
while (n < lines) {
mp.tui.move(sx, sy + n, 1);
n += 1;
}
mp.tui.move(sx, sy + cp);
mp.tui.attr(mp.colors.normal.attr);
mp.tui.refresh();
k = mp.tui.getkey();
/* set up a 2s timeout when reseting the user's hint */
local t = time();
if ((t - last_time) >= 2)
hint = "";
last_time = t;
if (k == 'cursor-up')
pos -= 1;
else
if (k == 'cursor-down')
pos += 1;
else
if (k == 'page-up')
pos -= (ty - sy);
else
if (k == 'page-down')
pos += (ty - sy);
else
if (k == 'home')
pos = 0;
else
if (k == 'end')
pos = size(data) - 1;
else
if (k == 'enter')
break;
else
if (k == 'escape') {
pos = NULL;
break;
}
else
if (k == 'mouse-left-button') {
pos = vy + mp.mouse_y - 1;
break;
}
else
if ((ord(k) >= ord('a') && ord(k) <= ord('z')) ||
(ord(k) >= ord('A') && ord(k) <= ord('Z')) ||
(ord(k) >= ord('0') && ord(k) <= ord('9')) ||
k == '.' || k == '_') {
/* hint ~= lc(k) is crashing mp-5 */
hint = join([hint, lc(k)]);
/* search the first item >= k */
pos = 0;
while (pos < size(data) - 1) {
local entry = data[pos];
if (flags != NULL && flags.split_entry) {
/* trim any trailing slash */
if (entry[size(entry) - 1] == '/')
entry = splice(entry, NULL, size(entry) - 1, 1);
local segment = split(entry, '/');
if (size(segment) > 0)
entry = segment[size(segment) - 1];
}
if (size(hint) <= size(entry)) {
/* no need to compare the complete entry, only the user-hinted size */
local c = splice(lc(entry), NULL, size(hint), size(entry) - size(hint));
if (cmp(hint, c) <= 0)
break;
}
pos += 1;
}
}
}
return pos;
}
sub mp.tui.confirm(msg, def, ypos)
{
local y, n;
local ret = NULL;
/* get the initials for localized 'Yes' and 'No' */
y = L("Yes")->slice(0, 1);
n = L("No")->slice(0, 1);
/* add options */
msg = msg + ' (' + y + '/' + n + ')';
if (def != NULL) {
/* a default option? add to prompt */
msg = msg + ' [' + (def && y || n) + ']';
}
mp.tui.prompt(msg, ypos);
while (ret == NULL) {
local k = mp.tui.getkey();
/* allow non-ascii letters for confirmation */
if (k == 'insert-raw-string')
k = mp.raw_string;
if (lc(k) == lc(y))
ret = 1;
if (lc(k) == lc(n))
ret = 2;
if (k == 'escape')
ret = 0;
if (k == 'enter')
ret = (def && 1 || 2);
}
return ret;
}
sub mp.tui.draw_scrollbar(doc)
/* draws a vertical read-only scrollbar */
{
local ty = mp.window.ty;
/* draw scrollbar only if doc is longer than the window height */
if (size(doc.txt.lines) > ty) {
local y1, y2, n;
y1 = integer((doc.txt.vy * ty) / size(doc.txt.lines));
y2 = integer(((doc.txt.vy + ty) * ty) / size(doc.txt.lines));
/* draw at least 1 line of "thumb" */
if (y1 == y2)
y2 += 1;
mp.tui.attr(mp.colors.normal.attr);
for (n = 0; n < ty; n += 1) {
if (n >= y1 && n < y2) {
local c = mp.tui.charat(mp.window.tx - 1, n);
mp.tui.attr(mp.colors.cursor.attr);
mp.tui.move(mp.window.tx - 1, n);
mp.tui.addstr(c);
}
}
mp.tui.attr(mp.colors.normal.attr);
}
}
sub mp.tui.draw(doc)
{
/* draw the document part */
mp.tui.doc_draw(doc);
/* draws the scrollbar */
mp.tui.draw_scrollbar(doc);
local t = "ctrl-space: " + L("Menu");
/* draw the status line */
mp.tui.attr(mp.colors.normal.attr);
mp.tui.move(0, mp.window.ty, 1);
mp.tui.addstr(mp.trim(mp.build_status_line(), mp.window.tx - size(t)));
/* draw the 'menu' hint */
mp.tui.move(mp.window.tx - size(t), mp.window.ty);
mp.tui.addstr(t);
/* if a hardware cursor is desired, set it */
if (mp.config.hw_cursor) {
mp.tui.move(
mp_c.x2vx(doc.txt.lines[doc.txt.y],
doc.txt.x - doc.txt.vx),
doc.txt.y - doc.txt.vy
);
}
mp.tui.refresh();
}
/** interface **/
sub mp_drv.alert(msg)
{
local k;
mp.tui.prompt(msg + L(" [ENTER]"));
while ((k = mp.tui.getkey()) != 'enter' && k != 'mouse-left-button');
}
sub mp_drv.openfile(prompt)
{
mp.tui.readline(prompt, 'openfile', NULL, { 'file' => 1 } );
}
sub mp_drv.savefile(prompt)
{
mp.tui.readline(prompt, 'savefile', NULL, { 'file' => 1 } );
}
sub mp_drv.openfolder(prompt)
{
mp.tui.readline(prompt, 'openfolder', NULL, {
file: 1,
folder: 1
}
);
}
sub mp_drv.confirm(msg, def)
{
mp.tui.confirm(msg, def);
}
sub mp_drv.form(widgets)
{
local r = [];
local pos = mp.window.ty + 1 - size(widgets);
local y = pos;
/* print first all prompts */
foreach (w, widgets) {
if (w.type != 'list') {
mp.tui.prompt(w.label, y);
y += 1;
}
}
y = pos;
/* now iterate widgets */
foreach (w, widgets) {
local r1 = NULL;
if (w.type == 'text')
r1 = mp.tui.readline(w.label, w.history, w.value,
{ 'y' => y } );
else
if (w.type == 'password')
r1 = mp.tui.readline(w.label, NULL, NULL,
{ 'password' => '*', 'y' => y });
else
if (w.type == 'checkbox') {
/* return value conversion */
local c = [ NULL, 1, 0 ];
r1 = c[mp.tui.confirm(w.label, w.value, y)];
}
else
if (w.type == 'list')
r1 = mp.tui.list(w.label, w.list, w.value);
/* cancellation? */
if (r1 == NULL) {
r = NULL;
break;
}
/* store value */
push(r, r1);
y += 1;
}
return r;
}
sub mp_drv.menu()
{
local mx = 0;
local action = NULL;
local key = NULL;
local mouse_x = [];
while (action == NULL && key != 'escape') {
local pos, mo, my, vy;
local n = 0;
/* wrap */
mx = (mx + size(mp.menu)) % size(mp.menu);
/* draw the menu bar */
mp.tui.attr(mp.colors.menu.attr);
mp.tui.move(0, 0, 1);
local cx = 0;
pos = [];
while (n < size(mp.menu)) {
/* get the label */
local l = L(mp.menu[n][0]);
/* strip (by now) the & */
l = sregex(l, '/&/g', NULL);
mp.tui.attr(mp.colors.menu.attr);
mp.tui.addstr(' ');
cx += 3;
if (n == mx) {
pos[0] = cx;
mp.tui.attr(mp.colors.cursor.attr);
}
mp.tui.addstr(l);
cx += size(l);
push(mouse_x, cx);
n += 1;
}
/* get the menu options */
mo = mp.menu[mx][1];
/* calculate panel optimal dimensions */
pos[2] = 0;
foreach (i, mo) {
local l = mp.menu_label(i);
if (size(l) > pos[2])
pos[2] = size(l);
}
/* if the panel will surpass the right margin,
move to the left */
if (pos[0] + pos[2] > mp.window.tx)
pos[0] = mp.window.tx - pos[2];
local pty = size(mo);
if (pty > mp.window.ty - 1)
pty = mp.window.ty - 1;
mp.tui.refresh();
mp.tui.attr(mp.colors.menu.attr);
my = 0;
vy = 0;
while (key != 'escape') {
/* draw the options */
if (my < vy) vy = my;
if (my > vy + (pty - 1)) vy = my - (pty - 1);
n = 0;
local empty = map(pos[2], ' ')->join();
local sep = map(pos[2], "\x{2500}")->join();
while (n < pty) {
local l = mp.menu_label(mo[n + vy]);
/* set color */
if (n == my - vy)
mp.tui.attr(mp.colors.cursor.attr);
else
mp.tui.attr(mp.colors.menu.attr);
mp.tui.move(pos[0], 1 + n);
if (l) {
mp.tui.addstr(empty);
mp.tui.move(pos[0], 1 + n);
mp.tui.addstr(l);
}
else
mp.tui.addstr(sep);
n += 1;
}
/* add visual cues that the menu is bigger */
if (size(mo) > pty) {
mp.tui.attr(mp.colors.menu.attr);
if (vy) {
mp.tui.move(pos[0] + pos[2] - 1, 1);
mp.tui.addstr("\x{25b2}");
}
if (pty + vy < size(mo)) {
mp.tui.move(pos[0] + pos[2] - 1, pty);
mp.tui.addstr("\x{25bc}");
}
}
/* move the hw cursor to the selected option */
mp.tui.move(pos[0], 1 + my - vy);
mp.tui.refresh();
key = mp.tui.getkey();
if (key == 'cursor-up') {
/* move up avoiding separators */
for (;;) {
my = (my - 1 + size(mo)) % size(mo);
if (mo[my] != '-')
break;
}
}
else
if (key == 'cursor-down') {
/* move down avoiding separators */
for (;;) {
my = (my + 1) % size(mo);
if (mo[my] != '-')
break;
}
}
else
if (key == 'cursor-right') {
mx += 1;
break;
}
else
if (key == 'cursor-left') {
mx -= 1;
break;
}
else
if (key == 'enter') {
action = mo[my];
break;
}
else
if (key == 'mouse-left-button') {
if (mp.mouse_y == 0) {
mx = 0;
foreach (x, mouse_x) {
if (x > mp.mouse_x)
break;
mx += 1;
}
}
else
if (mp.mouse_x < pos[0] ||
mp.mouse_x > pos[0] + pos[2] - 1 ||
mp.mouse_y > size(mo)) {
key = 'escape';
}
else {
local a = mo[mp.mouse_y - 1];
if (a != '-')
action = a;
}
break;
}
}
mp.tui.attr(mp.color.normal.attr);
mp.tui.draw(mp.active());
}
mp.tui.attr(mp.color.normal.attr);
if (action != NULL)
mp.process_action(action);
return NULL;
}
sub mp_drv.busy(onoff)
{
mp.tui.prompt(onoff && L("Please, wait...") || '');
}
sub mp_drv.main_loop()
{
while (!mp_c.exit_requested()) {
mp.tui.draw(mp.active());
local key = mp.tui.getkey();
mp.process_event(key);
}
}
/* returns the main namespace */
mp.tui;