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diff --git a/src/wreadln.c b/src/wreadln.c
index 608141f6414e589d6ec74aca7c2610f33694feb1..b6579410a3bf5b9adbd1605042ae49cac8217887 100644 (file)
--- a/src/wreadln.c
+++ b/src/wreadln.c
-/*
- * (c) 2004 by Kalle Wallin <kaw@linux.se>
- *
+/* ncmpc (Ncurses MPD Client)
+ * (c) 2004-2009 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 <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
/** 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 = locale_to_utf8(dup);
+ g_free(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 colum 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)
{
+ size_t size;
+
if (wr->line[wr->cursor] == 0)
return;
- ++wr->cursor;
- if (wr->cursor >= (size_t)wr->width &&
- wr->start < wr->cursor - wr->width + 1)
- ++wr->start;
+ 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)
{
+ size_t size;
+
if (wr->cursor == 0)
return;
- if (wr->cursor == wr->start && wr->start > 0)
- --wr->start;
- --wr->cursor;
+ 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)
{
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;
+
+ /* 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);
+ }
+
+ 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;
- cursor_move_right(wr);
+#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 i;
+ size_t rest, length;
assert(x < strlen(wr->line));
- for (i = x; wr->line[i] != 0; i++)
- wr->line[i] = wr->line[i + 1];
+ 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 */
gint key = 0;
size_t i;
+#ifdef NCMPC_MINI
+ (void)gcmp;
+#endif
+
/* turn off echo */
noecho();
/* make shure the cursor is visible */
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:
}
}
+ if (wr.line[0] == 0)
+ return NULL;
+
return g_strdup(wr.line);
}