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Cache widths in the line editor

This commit is contained in:
Přemysl Eric Janouch 2017-06-26 01:48:38 +02:00
parent ba3302982e
commit 9fc690c4c9
Signed by: p
GPG Key ID: B715679E3A361BE6
1 changed files with 45 additions and 14 deletions
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nncmpp.c
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@ -636,6 +636,7 @@ static struct app_context
int editor_point; ///< Caret index into line data
ARRAY (ucs4_t, editor_line) ///< Line data
ARRAY (int, editor_w) ///< Codepoint widths
void (*on_editor_changed) (void); ///< Callback on text change
void (*on_editor_end) (bool); ///< Callback on abort
@ -883,6 +884,7 @@ app_free_context (void)
item_list_free (&g.playlist);
free (g.editor_line);
free (g.editor_w);
config_free (&g.config);
poller_free (&g.poller);
@ -1361,11 +1363,15 @@ app_write_editor (struct row_buffer *row)
// TODO: there should be a one-character prefix to distinguish operations
// (also known as the prompt)
// TODO: some scrolling mechanism
// - left = point - COLS/2 worth of cells
// - while there's space on the right, move the left further
// This seems to work in all cases.
int offset = 0;
for (size_t i = 0; i < g.editor_line_len; i++)
{
if (g.editor_point > (int) i)
offset += uc_width (g.editor_line[i], locale_charset ());
offset += g.editor_w[i];
row_buffer_append_c (row, g.editor_line[i], APP_ATTR (HIGHLIGHT));
}
return MIN (offset, COLS - 1);
@ -1604,9 +1610,13 @@ app_editor_abort (bool status)
g.on_editor_end = NULL;
free (g.editor_line);
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;
}
/// Start the line editor; remember to fill in "change" and "abort" callbacks
@ -1614,6 +1624,7 @@ static void
app_editor_start (void)
{
ARRAY_INIT (g.editor_line);
ARRAY_INIT (g.editor_w);
g.editor_point = 0;
app_invalidate ();
}
@ -1625,6 +1636,15 @@ app_editor_changed (void)
g.on_editor_changed ();
}
static void
app_editor_move (int to, int from, int len)
{
memmove (g.editor_line + to, g.editor_line + from,
sizeof *g.editor_line * len);
memmove (g.editor_w + to, g.editor_w + from,
sizeof *g.editor_w * len);
}
static bool
app_editor_process_action (enum action action)
{
@ -1680,18 +1700,20 @@ app_editor_process_action (enum action action)
case ACTION_EDITOR_B_DELETE:
if (g.editor_point < 1)
return false;
memmove (g.editor_line + g.editor_point - 1,
g.editor_line + g.editor_point,
sizeof *g.editor_line * (g.editor_line_len-- - g.editor_point));
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_point--;
app_editor_changed ();
return true;
case ACTION_EDITOR_F_DELETE:
if (g.editor_point + 1 > (int) g.editor_line_len)
return false;
memmove (g.editor_line + g.editor_point,
g.editor_line + g.editor_point + 1,
sizeof *g.editor_line * (--g.editor_line_len - g.editor_point));
g.editor_line_len--;
g.editor_w_len--;
app_editor_move (g.editor_point, g.editor_point + 1,
g.editor_line_len - g.editor_point);
app_editor_changed ();
return true;
case ACTION_EDITOR_B_KILL_WORD:
@ -1704,20 +1726,24 @@ app_editor_process_action (enum action action)
while (i-- && g.editor_line[i] != ' ');
i++;
memmove (g.editor_line + i, g.editor_line + g.editor_point,
sizeof *g.editor_line * (g.editor_line_len - g.editor_point));
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;
g.editor_point = i;
app_editor_changed ();
return true;
}
case ACTION_EDITOR_B_KILL_LINE:
memmove (g.editor_line, g.editor_line + g.editor_point,
sizeof *g.editor_line * (g.editor_line_len -= g.editor_point));
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_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;
app_editor_changed ();
return true;
}
@ -1727,10 +1753,15 @@ static void
app_editor_insert (ucs4_t codepoint)
{
ARRAY_RESERVE (g.editor_line, 1);
memmove (g.editor_line + g.editor_point + 1, g.editor_line + g.editor_point,
sizeof *g.editor_line * (g.editor_line_len - g.editor_point));
g.editor_line[g.editor_point++] = codepoint;
ARRAY_RESERVE (g.editor_w, 1);
app_editor_move (g.editor_point + 1, g.editor_point,
g.editor_line_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++;
app_editor_changed ();
}