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Clean up the line editor

This commit is contained in:
Přemysl Eric Janouch 2017-06-26 01:59:55 +02:00
parent 9fc690c4c9
commit 6b2def7531
Signed by: p
GPG Key ID: B715679E3A361BE6
1 changed files with 39 additions and 35 deletions
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nncmpp.c
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@ -635,8 +635,10 @@ static struct app_context
// Line editor:
int editor_point; ///< Caret index into line data
ARRAY (ucs4_t, editor_line) ///< Line data
ARRAY (int, editor_w) ///< Codepoint widths
ucs4_t *editor_line; ///< Line data, 0-terminated
int *editor_w; ///< Codepoint widths, 0-terminated
size_t editor_len; ///< Editor length
size_t editor_alloc; ///< Editor allocated
void (*on_editor_changed) (void); ///< Callback on text change
void (*on_editor_end) (bool); ///< Callback on abort
@ -1368,7 +1370,7 @@ app_write_editor (struct row_buffer *row)
// This seems to work in all cases.
int offset = 0;
for (size_t i = 0; i < g.editor_line_len; i++)
for (size_t i = 0; i < g.editor_len; i++)
{
if (g.editor_point > (int) i)
offset += g.editor_w[i];
@ -1613,18 +1615,18 @@ app_editor_abort (bool status)
free (g.editor_w);
g.editor_line = NULL;
g.editor_w = NULL;
g.editor_line_alloc = 0;
g.editor_w_alloc = 0;
g.editor_line_len = 0;
g.editor_w_len = 0;
g.editor_alloc = 0;
g.editor_len = 0;
}
/// Start the line editor; remember to fill in "change" and "abort" callbacks
static void
app_editor_start (void)
{
ARRAY_INIT (g.editor_line);
ARRAY_INIT (g.editor_w);
g.editor_alloc = 16;
g.editor_line = xcalloc (sizeof *g.editor_line, g.editor_alloc);
g.editor_w = xcalloc (sizeof *g.editor_w, g.editor_alloc);
g.editor_len = 0;
g.editor_point = 0;
app_invalidate ();
}
@ -1632,6 +1634,9 @@ app_editor_start (void)
static void
app_editor_changed (void)
{
g.editor_line[g.editor_len] = 0;
g.editor_w[g.editor_len] = 0;
if (g.on_editor_changed)
g.on_editor_changed ();
}
@ -1666,7 +1671,7 @@ app_editor_process_action (enum action action)
g.editor_point--;
return true;
case ACTION_EDITOR_F_CHAR:
if (g.editor_point + 1 > (int) g.editor_line_len)
if (g.editor_point + 1 > (int) g.editor_len)
return false;
g.editor_point++;
return true;
@ -1682,11 +1687,11 @@ app_editor_process_action (enum action action)
}
case ACTION_EDITOR_F_WORD:
{
if (g.editor_point + 1 > (int) g.editor_line_len)
if (g.editor_point + 1 > (int) g.editor_len)
return false;
int i = g.editor_point;
while (i < (int) g.editor_line_len && g.editor_line[i] != ' ') i++;
while (i < (int) g.editor_line_len && g.editor_line[i] == ' ') i++;
while (i < (int) g.editor_len && g.editor_line[i] != ' ') i++;
while (i < (int) g.editor_len && g.editor_line[i] == ' ') i++;
g.editor_point = i;
return true;
}
@ -1694,26 +1699,24 @@ app_editor_process_action (enum action action)
g.editor_point = 0;
return true;
case ACTION_EDITOR_END:
g.editor_point = g.editor_line_len;
g.editor_point = g.editor_len;
return true;
case ACTION_EDITOR_B_DELETE:
if (g.editor_point < 1)
return false;
app_editor_move (g.editor_point - 1, g.editor_point,
g.editor_line_len - g.editor_point);
g.editor_line_len--;
g.editor_w_len--;
g.editor_len - g.editor_point);
g.editor_len--;
g.editor_point--;
app_editor_changed ();
return true;
case ACTION_EDITOR_F_DELETE:
if (g.editor_point + 1 > (int) g.editor_line_len)
if (g.editor_point + 1 > (int) g.editor_len)
return false;
g.editor_line_len--;
g.editor_w_len--;
g.editor_len--;
app_editor_move (g.editor_point, g.editor_point + 1,
g.editor_line_len - g.editor_point);
g.editor_len - g.editor_point);
app_editor_changed ();
return true;
case ACTION_EDITOR_B_KILL_WORD:
@ -1726,24 +1729,20 @@ app_editor_process_action (enum action action)
while (i-- && g.editor_line[i] != ' ');
i++;
app_editor_move (i, g.editor_point,
(g.editor_line_len - g.editor_point));
g.editor_line_len -= g.editor_point - i;
g.editor_w_len -= g.editor_point - i;
app_editor_move (i, g.editor_point, (g.editor_len - g.editor_point));
g.editor_len -= g.editor_point - i;
g.editor_point = i;
app_editor_changed ();
return true;
}
case ACTION_EDITOR_B_KILL_LINE:
g.editor_line_len -= g.editor_point;
g.editor_w_len -= g.editor_point;
app_editor_move (0, g.editor_point, g.editor_line_len);
g.editor_len -= g.editor_point;
app_editor_move (0, g.editor_point, g.editor_len);
g.editor_point = 0;
app_editor_changed ();
return true;
case ACTION_EDITOR_F_KILL_LINE:
g.editor_line_len = g.editor_point;
g.editor_w_len = g.editor_point;
g.editor_len = g.editor_point;
app_editor_changed ();
return true;
}
@ -1752,16 +1751,21 @@ app_editor_process_action (enum action action)
static void
app_editor_insert (ucs4_t codepoint)
{
ARRAY_RESERVE (g.editor_line, 1);
ARRAY_RESERVE (g.editor_w, 1);
while (g.editor_alloc - g.editor_len < 2)
{
g.editor_alloc <<= 1;
g.editor_line = xreallocarray
(g.editor_line, sizeof *g.editor_line, g.editor_alloc);
g.editor_w = xreallocarray
(g.editor_w, sizeof *g.editor_w, g.editor_alloc);
}
app_editor_move (g.editor_point + 1, g.editor_point,
g.editor_line_len - g.editor_point);
g.editor_len - g.editor_point);
g.editor_line[g.editor_point] = codepoint;
// FIXME: this should care about app_is_character_in_locale() as well
g.editor_w[g.editor_point] = uc_width (codepoint, locale_charset ());
g.editor_point++;
g.editor_line_len++;
g.editor_w_len++;
g.editor_len++;
app_editor_changed ();
}