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diff --git a/src/wreadln.c b/src/wreadln.c
index 0bfc414086a7ac541b990d776492a74f146576c0..c6dbda7a195b74d62772865b800401de095199e6 100644 (file)
--- a/src/wreadln.c
+++ b/src/wreadln.c
-/*
- * (c) 2004 by Kalle Wallin <kaw@linux.se>
- *
+/* ncmpc (Ncurses MPD Client)
+ * (c) 2004-2010 The Music Player Daemon Project
+ * Project homepage: http://musicpd.org
+
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
+
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
#include "wreadln.h"
#include "charset.h"
#include "screen_utils.h"
#include "config.h"
+#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+#include <sys/poll.h>
+#endif
+
#define KEY_CTRL_A 1
#define KEY_CTRL_B 2
#define KEY_CTRL_C 3
#define KEY_CTRL_N 14
#define KEY_CTRL_P 16
#define KEY_CTRL_U 21
+#define KEY_CTRL_W 23
#define KEY_CTRL_Z 26
#define KEY_BCKSPC 8
#define TAB 9
WINDOW *const w;
/** the origin coordinates in the window */
- gint x, y;
+ unsigned x, y;
/** the screen width of the input field */
- gint width;
+ unsigned width;
/** is the input masked, i.e. characters displayed as '*'? */
const gboolean masked;
/** the byte position of the cursor */
- gint cursor;
+ size_t cursor;
/** the byte position displayed at the origin (for horizontal
scrolling) */
- gint start;
+ size_t start;
/** the current value */
gchar line[1024];
/** max items stored in the history list */
static const guint wrln_max_history_length = 32;
+#ifndef NCMPC_MINI
void *wrln_completion_callback_data = NULL;
wrln_gcmp_pre_cb_t wrln_pre_completion_callback = NULL;
wrln_gcmp_post_cb_t wrln_post_completion_callback = NULL;
+#endif
+
+/** converts a byte position to a screen column */
+static unsigned
+byte_to_screen(const gchar *data, size_t x)
+{
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ gchar *dup;
+ char *p;
+ unsigned width;
+
+ assert(x <= strlen(data));
+
+ dup = g_strdup(data);
+ dup[x] = 0;
+ p = replace_locale_to_utf8(dup);
+
+ width = utf8_width(p);
+ g_free(p);
+
+ return width;
+#else
+ (void)data;
+
+ return (unsigned)x;
+#endif
+}
+
+/** finds the first character which doesn't fit on the screen */
+static size_t
+screen_to_bytes(const gchar *data, unsigned width)
+{
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ size_t length = strlen(data);
+ gchar *dup = g_strdup(data);
+ char *p;
+ unsigned p_width;
+
+ while (true) {
+ dup[length] = 0;
+ p = locale_to_utf8(dup);
+ p_width = utf8_width(p);
+ g_free(p);
+ if (p_width <= width)
+ break;
+
+ --length;
+ }
+
+ g_free(dup);
+
+ return length;
+#else
+ (void)data;
+
+ return (size_t)width;
+#endif
+}
+
+/** returns the screen column where the cursor is located */
+static unsigned
+cursor_column(const struct wreadln *wr)
+{
+ return byte_to_screen(wr->line + wr->start,
+ wr->cursor - wr->start);
+}
+
+/** returns the offset in the string to align it at the right border
+ of the screen */
+static inline size_t
+right_align_bytes(const gchar *data, size_t right, unsigned width)
+{
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ gchar *dup;
+ size_t start = 0;
+
+ assert(right <= strlen(data));
+
+ dup = g_strdup(data);
+ dup[right] = 0;
+
+ while (dup[start] != 0) {
+ char *p = locale_to_utf8(dup + start), *q;
+ unsigned p_width = utf8_width(p);
+ gunichar c;
+
+ if (p_width < width) {
+ g_free(p);
+ break;
+ }
+
+ c = g_utf8_get_char(p);
+ p[g_unichar_to_utf8(c, NULL)] = 0;
+ q = utf8_to_locale(p);
+ g_free(p);
+
+ start += strlen(q);
+ g_free(q);
+ }
+
+ g_free(dup);
+
+ return start;
+#else
+ (void)data;
+
+ return right >= width ? right + 1 - width : 0;
+#endif
+}
+
+/** returns the size (in bytes) of the next character */
+static inline size_t
+next_char_size(const gchar *data)
+{
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ char *p = locale_to_utf8(data), *q;
+ gunichar c;
+ size_t size;
+
+ c = g_utf8_get_char(p);
+ p[g_unichar_to_utf8(c, NULL)] = 0;
+ q = utf8_to_locale(p);
+ g_free(p);
+
+ size = strlen(q);
+ g_free(q);
+
+ return size;
+#else
+ (void)data;
+
+ return 1;
+#endif
+}
+
+/** returns the size (in bytes) of the previous character */
+static inline size_t
+prev_char_size(const gchar *data, size_t x)
+{
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ char *p = locale_to_utf8(data), *q;
+ gunichar c;
+ size_t size;
+
+ assert(x > 0);
+
+ q = p;
+ while (true) {
+ c = g_utf8_get_char(q);
+ size = g_unichar_to_utf8(c, NULL);
+ if (size > x)
+ size = x;
+ x -= size;
+ if (x == 0) {
+ g_free(p);
+ return size;
+ }
+
+ q += size;
+ }
+#else
+ (void)data;
+ (void)x;
+
+ return 1;
+#endif
+}
/* move the cursor one step to the right */
static inline void cursor_move_right(struct wreadln *wr)
{
- if (wr->cursor < (int)strlen(wr->line)) {
- ++wr->cursor;
- if (wr->cursor >= wr->width &&
- wr->start < wr->cursor - wr->width + 1)
- ++wr->start;
- }
+ size_t size;
+
+ if (wr->line[wr->cursor] == 0)
+ return;
+
+ size = next_char_size(wr->line + wr->cursor);
+ wr->cursor += size;
+ if (cursor_column(wr) >= wr->width)
+ wr->start = right_align_bytes(wr->line, wr->cursor, wr->width);
}
/* move the cursor one step to the left */
static inline void cursor_move_left(struct wreadln *wr)
{
- if (wr->cursor > 0) {
- if (wr->cursor == wr->start && wr->start > 0)
- --wr->start;
- --wr->cursor;
- }
+ size_t size;
+
+ if (wr->cursor == 0)
+ return;
+
+ size = prev_char_size(wr->line, wr->cursor);
+ assert(wr->cursor >= size);
+ wr->cursor -= size;
+ if (wr->cursor < wr->start)
+ wr->start = wr->cursor;
}
/* move the cursor to the end of the line */
static inline void cursor_move_to_eol(struct wreadln *wr)
{
wr->cursor = strlen(wr->line);
- if (wr->cursor >= wr->width)
- wr->start = wr->cursor - wr->width + 1;
+ if (cursor_column(wr) >= wr->width)
+ wr->start = right_align_bytes(wr->line, wr->cursor, wr->width);
}
/* draw line buffer and update cursor position */
whline(wr->w, ' ', wr->width);
/* print visible part of the line buffer */
if (wr->masked)
- whline(wr->w, '*', utf8_width(wr->line) - wr->start);
+ whline(wr->w, '*', utf8_width(wr->line + wr->start));
else
- waddnstr(wr->w, wr->line + wr->start, wr->width);
+ waddnstr(wr->w, wr->line + wr->start,
+ screen_to_bytes(wr->line, wr->width));
/* move the cursor to the correct position */
- wmove(wr->w, wr->y, wr->x + wr->cursor - wr->start);
+ wmove(wr->w, wr->y, wr->x + cursor_column(wr));
/* tell ncurses to redraw the screen */
doupdate();
}
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+static bool
+multibyte_is_complete(const char *p, size_t length)
+{
+ GError *error = NULL;
+ gchar *q = g_locale_to_utf8(p, length,
+ NULL, NULL, &error);
+ if (q != NULL) {
+ g_free(q);
+ return true;
+ } else {
+ g_error_free(error);
+ return false;
+ }
+}
+#endif
+
static void
wreadln_insert_byte(struct wreadln *wr, gint key)
{
- if (strlen(wr->line + wr->cursor)) { /* if the cursor is */
- /* not at the last pos */
- gsize rest = strlen(wr->line + wr->cursor) + 1;
+ size_t rest = strlen(wr->line + wr->cursor) + 1;
+#if defined(ENABLE_WIDE) || defined(ENABLE_MULTIBYTE)
+ char buffer[32] = { key };
+ size_t length = 1;
+ struct pollfd pfd = {
+ .fd = 0,
+ .events = POLLIN,
+ };
+ int ret;
- memmove(wr->line + wr->cursor + 1,
- wr->line + wr->cursor, rest);
- wr->line[wr->cursor] = key;
- } else {
- wr->line[wr->cursor + 1] = 0;
- wr->line[wr->cursor] = key;
+ /* wide version: try to complete the multibyte sequence */
+
+ while (length < sizeof(buffer)) {
+ if (multibyte_is_complete(buffer, length))
+ /* sequence is complete */
+ break;
+
+ /* poll for more bytes on stdin, without timeout */
+
+ ret = poll(&pfd, 1, 0);
+ if (ret <= 0)
+ /* no more input from keyboard */
+ break;
+
+ buffer[length++] = wgetch(wr->w);
}
- cursor_move_right(wr);
+ memmove(wr->line + wr->cursor + length,
+ wr->line + wr->cursor, rest);
+ memcpy(wr->line + wr->cursor, buffer, length);
+
+#else
+ const size_t length = 1;
+
+ memmove(wr->line + wr->cursor + length,
+ wr->line + wr->cursor, rest);
+ wr->line[wr->cursor] = key;
+
+#endif
+
+ wr->cursor += length;
+ if (cursor_column(wr) >= wr->width)
+ wr->start = right_align_bytes(wr->line, wr->cursor, wr->width);
+}
+
+static void
+wreadln_delete_char(struct wreadln *wr, size_t x)
+{
+ size_t rest, length;
+
+ assert(x < strlen(wr->line));
+
+ length = next_char_size(&wr->line[x]);
+ rest = strlen(&wr->line[x + length]) + 1;
+ memmove(&wr->line[x], &wr->line[x + length], rest);
}
/* libcurses version */
_wreadln(WINDOW *w,
const gchar *prompt,
const gchar *initial_value,
- gint x1,
+ unsigned x1,
GList **history,
GCompletion *gcmp,
gboolean masked)
.start = 0,
};
GList *hlist = NULL, *hcurrent = NULL;
- gint key = 0, i;
+ gint key = 0;
+ size_t i;
+
+#ifdef NCMPC_MINI
+ (void)gcmp;
+#endif
/* turn off echo */
noecho();
- /* make shure the cursor is visible */
+ /* make sure the cursor is visible */
curs_set(1);
/* print prompt string */
- if (prompt)
+ if (prompt) {
waddstr(w, prompt);
- /* retrive y and x0 position */
+ waddstr(w, ": ");
+ }
+ /* retrieve y and x0 position */
getyx(w, wr.y, wr.x);
/* check the x1 value */
- if (x1 <= wr.x || x1 > COLS)
+ if (x1 <= wr.x || x1 > (unsigned)COLS)
x1 = COLS;
wr.width = x1 - wr.x;
/* clear input area */
/* check if key is a function key */
for (i = 0; i < 63; i++)
- if (key == KEY_F(i)) {
+ if (key == (int)KEY_F(i)) {
key = KEY_F(1);
i = 64;
}
#ifdef HAVE_GETMOUSE
case KEY_MOUSE: /* ignore mouse events */
#endif
- case ERR: /* ingnore errors */
+ case ERR: /* ignore errors */
break;
case TAB:
+#ifndef NCMPC_MINI
if (gcmp) {
char *prefix = NULL;
GList *list;
wrln_post_completion_callback(gcmp, wr.line, list,
wrln_completion_callback_data);
}
+#endif
break;
case KEY_CTRL_G:
wr.line[i] = '\0';
wr.cursor = 0;
break;
+ case KEY_CTRL_W:
+ /* Firstly remove trailing spaces. */
+ for (i = wr.cursor; i > 0 && wr.line[i-1] == ' '; i--)
+ {
+ cursor_move_left(&wr);
+ wreadln_delete_char(&wr, wr.cursor);
+ }
+ /* Then remove word until next space. */
+ for (; i > 0 && wr.line[i-1] != ' '; i--)
+ {
+ cursor_move_left(&wr);
+ wreadln_delete_char(&wr, wr.cursor);
+ }
+ break;
case 127:
case KEY_BCKSPC: /* handle backspace: copy all */
case KEY_BACKSPACE: /* chars starting from curpos */
- if (wr.cursor > 0) {/* - 1 from buf[n+1] to buf */
- for (i = wr.cursor - 1; wr.line[i] != 0; i++)
- wr.line[i] = wr.line[i + 1];
+ if (wr.cursor > 0) { /* - 1 from buf[n+1] to buf */
cursor_move_left(&wr);
+ wreadln_delete_char(&wr, wr.cursor);
}
break;
case KEY_DC: /* handle delete key. As above */
case KEY_CTRL_D:
- if (wr.cursor <= (gint)utf8_width(wr.line) - 1) {
- for (i = wr.cursor; wr.line[i] != 0; i++)
- wr.line[i] = wr.line[i + 1];
- }
+ if (wr.line[wr.cursor] != 0)
+ wreadln_delete_char(&wr, wr.cursor);
break;
case KEY_UP:
case KEY_CTRL_P:
}
}
+ if (wr.line[0] == 0)
+ return NULL;
+
return g_strdup(wr.line);
}
wreadln(WINDOW *w,
const gchar *prompt,
const gchar *initial_value,
- gint x1,
+ unsigned x1,
GList **history,
GCompletion *gcmp)
{
wreadln_masked(WINDOW *w,
const gchar *prompt,
const gchar *initial_value,
- gint x1,
+ unsigned x1,
GList **history,
GCompletion *gcmp)
{