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/*
* STFL - The Structured Terminal Forms Language/Library
* Copyright (C) 2006, 2007 Clifford Wolf <clifford@clifford.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*
* wt_input.c: Widget type 'input'
*/
#include "stfl_internals.h"
#include <string.h>
#include <stdlib.h>
#include <wctype.h>
static void wt_input_init(struct stfl_widget *w)
{
w->allow_focus = 1;
}
static void fix_offset_pos(struct stfl_widget *w)
{
int pos = stfl_widget_getkv_int(w, L"pos", 0);
int offset = stfl_widget_getkv_int(w, L"offset", 0);
const wchar_t* text = stfl_widget_getkv_str(w, L"text", L"");
int text_len = wcslen(text);
int changed = 0;
int width;
if (pos > text_len) {
pos = text_len;
changed = 1;
}
if (offset > pos) {
offset = pos;
changed = 1;
}
width = wcswidth(text + offset, pos - offset);
while (width >= w->w && pos > offset) {
width -= wcwidth(text[offset++]);
changed = 1;
}
if (changed) {
stfl_widget_setkv_int(w, L"pos", pos);
stfl_widget_setkv_int(w, L"offset", offset);
}
}
static void wt_input_prepare(struct stfl_widget *w, struct stfl_form *f)
{
int size = stfl_widget_getkv_int(w, L"size", 5);
w->min_w = size;
w->min_h = 1;
fix_offset_pos(w);
}
static void wt_input_draw(struct stfl_widget *w, struct stfl_form *f, WINDOW *win)
{
int pos = stfl_widget_getkv_int(w, L"pos", 0);
int blind = stfl_widget_getkv_int(w, L"blind", 0);
int offset = stfl_widget_getkv_int(w, L"offset", 0);
const wchar_t * const text_off = stfl_widget_getkv_str(w, L"text", L"") + offset;
int i;
stfl_widget_style(w, f, win);
for (i=0; i<w->w; i++)
mvwaddwstr(win, w->y, w->x+i, L" ");
if (!blind) {
const int off_len = wcslen(text_off);
int width, len;
width = wcswidth(text_off, w->w);
if (w->w > off_len)
len = off_len;
else
len = w->w;
while (width > w->w)
width -= wcwidth(text_off[--len]);
mvwaddnwstr(win, w->y, w->x, text_off, len);
}
if (f->current_focus_id == w->id) {
f->root->cur_x = f->cursor_x = w->x + wcswidth(text_off, pos - offset);
f->root->cur_y = f->cursor_y = w->y;
}
}
static int wt_input_process(struct stfl_widget *w, struct stfl_widget *fw, struct stfl_form *f, wchar_t ch, int isfunckey)
{
int pos = stfl_widget_getkv_int(w, L"pos", 0);
const wchar_t *text = stfl_widget_getkv_str(w, L"text", L"");
int text_len = wcslen(text);
if (pos > 0 && stfl_matchbind(w, ch, isfunckey, L"left", L"LEFT")) {
stfl_widget_setkv_int(w, L"pos", pos-1);
fix_offset_pos(w);
return 1;
}
if (pos < text_len && stfl_matchbind(w, ch, isfunckey, L"right", L"RIGHT")) {
stfl_widget_setkv_int(w, L"pos", pos+1);
fix_offset_pos(w);
return 1;
}
// pos1 / home / Ctrl-A
if (stfl_matchbind(w, ch, isfunckey, L"home", L"HOME ^A")) {
stfl_widget_setkv_int(w, L"pos", 0);
fix_offset_pos(w);
return 1;
}
// end / Ctrl-E
if (stfl_matchbind(w, ch, isfunckey, L"end", L"END ^E")) {
stfl_widget_setkv_int(w, L"pos", text_len);
fix_offset_pos(w);
return 1;
}
// delete
if (stfl_matchbind(w, ch, isfunckey, L"delete", L"DC")) {
if (pos == text_len)
return 0;
wchar_t newtext[text_len];
wmemcpy(newtext, text, pos);
wcscpy(newtext + pos, text + pos + 1);
stfl_widget_setkv_str(w, L"text", newtext);
fix_offset_pos(w);
return 1;
}
// backspace
if (stfl_matchbind(w, ch, isfunckey, L"backspace", L"BACKSPACE")) {
if (pos == 0)
return 0;
wchar_t newtext[text_len];
wmemcpy(newtext, text, pos-1);
wcscpy(newtext + pos - 1, text + pos);
stfl_widget_setkv_str(w, L"text", newtext);
stfl_widget_setkv_int(w, L"pos", pos-1);
fix_offset_pos(w);
return 1;
}
// 'normal' characters
if (!isfunckey && iswprint(ch)) {
wchar_t newtext[text_len + 2];
wmemcpy(newtext, text, pos);
newtext[pos] = ch;
wcscpy(newtext + pos + 1, text + pos);
stfl_widget_setkv_str(w, L"text", newtext);
stfl_widget_setkv_int(w, L"pos", pos+1);
fix_offset_pos(w);
return 1;
}
return 0;
}
struct stfl_widget_type stfl_widget_type_input = {
L"input",
wt_input_init,
0, // f_done
0, // f_enter
0, // f_leave
wt_input_prepare,
wt_input_draw,
wt_input_process
};
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