From c8029a5a1356ee7e684dc6dfe4001bcc739bc2a6 Mon Sep 17 00:00:00 2001
From: Lukas Fleischer <calcurse@cryptocrack.de>
Date: Tue, 7 Jun 2011 09:26:48 +0200
Subject: Refactor getstring code
* Rename static showstring() function to getstr_print(), rename
ins_char() to getstr_ins_char() and del_char() to getstr_del_char().
* Refactor out getstring data structure initialization and window
scrolling routines.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
---
src/getstring.c | 118 +++++++++++++++++++++++++++++++-------------------------
1 file changed, 65 insertions(+), 53 deletions(-)
diff --git a/src/getstring.c b/src/getstring.c
index 05f9d98..9dd7b8a 100644
--- a/src/getstring.c
+++ b/src/getstring.c
@@ -49,7 +49,7 @@ struct getstr_status {
/* Print the string at the desired position. */
static void
-showstring (WINDOW *win, int x, int y, struct getstr_status *st)
+getstr_print (WINDOW *win, int x, int y, struct getstr_status *st)
{
char c = 0;
@@ -74,7 +74,7 @@ showstring (WINDOW *win, int x, int y, struct getstr_status *st)
/* Delete a character at the given position in string. */
static void
-del_char (struct getstr_status *st)
+getstr_del_char (struct getstr_status *st)
{
char *str = st->s + st->ci[st->pos].offset;
int cl = st->ci[st->pos + 1].offset - st->ci[st->pos].offset;
@@ -93,7 +93,7 @@ del_char (struct getstr_status *st)
/* Add a character at the given position in string. */
static void
-ins_char (struct getstr_status *st, char *c)
+getstr_ins_char (struct getstr_status *st, char *c)
{
char *str = st->s + st->ci[st->pos].offset;
int cl = UTF8_LENGTH (c[0]);
@@ -101,7 +101,7 @@ ins_char (struct getstr_status *st, char *c)
int i;
memmove (str + cl, str, strlen (str) + 1);
- for (i = 0; c[i]; i++, str++)
+ for (i = 0; i < cl; i++, str++)
*str = c[i];
for (i = st->len; i >= st->pos; i--)
@@ -118,6 +118,59 @@ bell (void)
printf ("\a");
}
+/* Initialize getstring data structure. */
+static void
+getstr_init (struct getstr_status *st, char *str, struct getstr_charinfo *ci)
+{
+ int width;
+
+ st->s = str;
+ st->ci = ci;
+
+ st->len = width = 0;
+ while (*str)
+ {
+ st->ci[st->len].offset = str - st->s;
+ st->ci[st->len].dpyoff = width;
+
+ st->len++;
+ width += utf8_width (str);
+ str += UTF8_LENGTH (*str);
+ }
+ st->ci[st->len].offset = str - st->s;
+ st->ci[st->len].dpyoff = width;
+
+ st->pos = st->len;
+ st->scrpos = 0;
+}
+
+/* Scroll left/right if the cursor moves outside the window range. */
+static void
+getstr_fixscr (struct getstr_status *st)
+{
+ const int pgsize = col / 3;
+ int pgskip;
+
+ while (st->pos < st->scrpos)
+ {
+ pgskip = 0;
+ while (pgskip < pgsize)
+ {
+ st->scrpos--;
+ pgskip += st->ci[st->scrpos + 1].dpyoff - st->ci[st->scrpos].dpyoff;
+ }
+ }
+ while (st->ci[st->pos].dpyoff - st->ci[st->scrpos].dpyoff > col - 2)
+ {
+ pgskip = 0;
+ while (pgskip < pgsize)
+ {
+ pgskip += st->ci[st->scrpos + 1].dpyoff - st->ci[st->scrpos].dpyoff;
+ st->scrpos++;
+ }
+ }
+}
+
/*
* Getstring allows to get user input and to print it on a window,
* even if noecho() is on. This function is also used to modify an existing
@@ -129,58 +182,18 @@ bell (void)
enum getstr
getstring (WINDOW *win, char *str, int l, int x, int y)
{
- const int pgsize = col / 3;
- int pgskip;
-
struct getstr_status st;
struct getstr_charinfo ci[l + 1];
- int width;
int ch, k;
char c[6];
- st.s = str;
- st.ci = ci;
- st.len = 0;
- width = 0;
- while (*str)
- {
- st.ci[st.len].offset = str - st.s;
- st.ci[st.len].dpyoff = width;
-
- st.len++;
- width += utf8_width (str);
- str += UTF8_LENGTH (*str);
- }
- st.ci[st.len].offset = str - st.s;
- st.ci[st.len].dpyoff = width;
-
- st.pos = st.len;
- st.scrpos = 0;
-
+ getstr_init (&st, str, ci);
custom_apply_attr (win, ATTR_HIGHEST);
for (;;) {
- while (st.pos < st.scrpos)
- {
- pgskip = 0;
- while (pgskip < pgsize)
- {
- st.scrpos--;
- pgskip += st.ci[st.scrpos + 1].dpyoff - st.ci[st.scrpos].dpyoff;
- }
- }
- while (st.ci[st.pos].dpyoff - st.ci[st.scrpos].dpyoff > col - 2)
- {
- pgskip = 0;
- while (pgskip < pgsize)
- {
- pgskip += st.ci[st.scrpos + 1].dpyoff - st.ci[st.scrpos].dpyoff;
- st.scrpos++;
- }
- }
-
- showstring (win, x, y, &st);
+ getstr_fixscr (&st);
+ getstr_print (win, x, y, &st);
wins_doupdate ();
if ((ch = wgetch (win)) == '\n') break;
@@ -193,14 +206,14 @@ getstring (WINDOW *win, char *str, int l, int x, int y)
if (st.pos > 0)
{
st.pos--;
- del_char (&st);
+ getstr_del_char (&st);
}
else
bell ();
break;
case CTRL ('D'): /* delete next character */
if (st.pos < st.len)
- del_char (&st);
+ getstr_del_char (&st);
else
bell ();
break;
@@ -209,12 +222,12 @@ getstring (WINDOW *win, char *str, int l, int x, int y)
while (st.pos && st.s[st.ci[st.pos - 1].offset] == ' ')
{
st.pos--;
- del_char (&st);
+ getstr_del_char (&st);
}
while (st.pos && st.s[st.ci[st.pos - 1].offset] != ' ')
{
st.pos--;
- del_char (&st);
+ getstr_del_char (&st);
}
}
else
@@ -244,10 +257,9 @@ getstring (WINDOW *win, char *str, int l, int x, int y)
default: /* insert one character */
for (c[0] = ch, k = 1; k < MIN (UTF8_LENGTH (c[0]), 6); k++)
c[k] = (unsigned char)wgetch (win);
- c[k] = 0;
if (st.ci[st.len].offset + k < l)
{
- ins_char (&st, c);
+ getstr_ins_char (&st, c);
st.pos++;
}
}
--
cgit v1.2.3-70-g09d2