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CE improve editor performace by reducing amount of copying
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This commit is contained in:
Kamil Kowalczyk
2026-03-06 21:59:41 +01:00
parent eb3238bf85
commit 49059f4bfa
4 changed files with 45 additions and 53 deletions
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60
ce/edit.c
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@@ -123,19 +123,40 @@ void edit_start (const char* file_path, const char* text) {
bbptr += w;
bb_remaining -= w;
char* render = gapbuffer_get_string (&warena_malloc, &temp_arena, &line->gb);
size_t len = strlen (render);
size_t part1_len = line->gb.gap_start;
size_t part2_len = line->gb.size - line->gb.gap_end;
if (len > editor.col_offset) {
char* visible = render + editor.col_offset;
size_t visible_len = len - editor.col_offset;
size_t current_col = 0;
if (visible_len > cols)
visible_len = cols;
if (part1_len > editor.col_offset) {
size_t start = editor.col_offset;
size_t len = part1_len - start;
w = snprintf (bbptr, bb_remaining, "%.*s", (int)visible_len, visible);
if (len > cols)
len = cols;
w = snprintf (bbptr, bb_remaining, "%.*s", (int)len, &line->gb.buffer[start]);
bbptr += w;
bb_remaining -= w;
current_col += len;
}
if (current_col < cols && part2_len > 0) {
size_t skip = 0;
if (editor.col_offset > part1_len)
skip = editor.col_offset - part1_len;
if (skip < part2_len) {
size_t len = part2_len - skip;
if (current_col + len > cols)
len = cols - current_col;
w = snprintf (bbptr, bb_remaining, "%.*s", (int)len,
&line->gb.buffer[line->gb.gap_end + skip]);
bbptr += w;
bb_remaining -= w;
}
}
w = snprintf (bbptr, bb_remaining, ANSIQ_SCR_CLR2END "\n");
@@ -166,31 +187,35 @@ void edit_start (const char* file_path, const char* text) {
uint8_t ch = 0;
mail_receive (&ch, 1);
gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
switch (ch) {
case '\b':
if (editor.cursor.col > 0) {
gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
editor.cursor.col--;
gapbuffer_backspace (&editor.current_line->gb);
}
break;
case '\n': {
gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
struct edit_line* new_line = malloc (sizeof (*new_line));
memset (new_line, 0, sizeof (*new_line));
char* tail = gapbuffer_string_at (&warena_malloc, &temp_arena, &editor.current_line->gb,
editor.cursor.col);
size_t tail_size = strlen (tail);
size_t init_cap = tail_size > 0 ? tail_size : 32;
gapbuffer_init (&wmalloc, NULL, &new_line->gb, tail_size > 0 ? tail_size : 32);
gapbuffer_init (&wmalloc, NULL, &new_line->gb, init_cap);
for (size_t i = 0; i < tail_size; i++) {
char chr = gapbuffer_at (&editor.current_line->gb, editor.cursor.col);
gapbuffer_delete_at (&editor.current_line->gb, editor.cursor.col);
gapbuffer_insert (&wrealloc, NULL, &new_line->gb, chr);
if (tail_size > 0) {
memcpy (new_line->gb.buffer,
editor.current_line->gb.buffer + editor.current_line->gb.gap_end, tail_size);
new_line->gb.gap_start = tail_size;
}
editor.current_line->gb.gap_end = editor.current_line->gb.size;
list_insert_after (editor.lines, &editor.current_line->lines_link, &new_line->lines_link);
editor.cursor.col = 0;
@@ -198,8 +223,10 @@ void edit_start (const char* file_path, const char* text) {
editor.current_line = new_line;
} break;
case KB_DELETE:
if (editor.cursor.col < gapbuffer_length (&editor.current_line->gb))
if (editor.cursor.col < gapbuffer_length (&editor.current_line->gb)) {
gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
editor.current_line->gb.gap_end++;
}
break;
case KB_LEFT:
if (editor.cursor.col > 0)
@@ -240,6 +267,7 @@ void edit_start (const char* file_path, const char* text) {
break;
default:
if (isprint (ch)) {
gapbuffer_move (&editor.current_line->gb, editor.cursor.col);
gapbuffer_insert (&wrealloc, NULL, &editor.current_line->gb, ch);
editor.cursor.col++;
}