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txtedit: support proportional fonts and dynamic cursor alignment

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boreddevnl 2026-04-23 00:03:06 +02:00
parent eb19e37d91
commit 228b5753d9
1 changed files with 35 additions and 19 deletions
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54
src/userland/gui/txtedit.c
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@ -16,8 +16,8 @@
#define EDITOR_MAX_LINES 128
#define EDITOR_MAX_LINE_LEN 256
#define EDITOR_LINE_HEIGHT 16
#define EDITOR_CHAR_WIDTH 8
static int editor_line_height = 16;
static int editor_char_width = 8;
typedef struct {
char content[EDITOR_MAX_LINE_LEN];
@ -99,7 +99,11 @@ static void editor_ensure_cursor_visible(void) {
int header_h = 32;
int footer_h = 24;
int editor_h = win_h - header_h - footer_h;
int visible_lines = (editor_h - 10) / EDITOR_LINE_HEIGHT;
if (editor_line_height == 0) editor_line_height = ui_get_font_height();
if (editor_line_height < 10) editor_line_height = 16;
int visible_lines = (editor_h - 10) / editor_line_height;
if (cursor_line < scroll_top) {
scroll_top = cursor_line;
@ -267,25 +271,26 @@ static void editor_paint(ui_window_t win) {
ui_draw_rounded_rect_filled(win, save_btn_x, save_btn_y, save_btn_w, save_btn_h, 6, COLOR_DARK_BORDER);
ui_draw_string(win, save_btn_x + 18, save_btn_y + 4, "Save", COLOR_DARK_TEXT);
if (file_modified) {
ui_draw_string(win, padding + content_width - 180, 8, "[Modified]", COLOR_RED);
}
ui_draw_rect(win, 0, editor_y, win_w, editor_h, COLOR_DARK_BG);
// Editor background
ui_draw_rect(win, padding, editor_y, content_width, editor_h, COLOR_DARK_BG);
editor_line_height = ui_get_font_height();
if (editor_line_height < 10) editor_line_height = 16;
int text_start_x = padding + 40;
int available_width = content_width - 40;
int max_chars_per_line = available_width / EDITOR_CHAR_WIDTH;
if (max_chars_per_line < 1) max_chars_per_line = 1;
char max_line_str[16];
itoa(line_count, max_line_str);
int line_num_w = ui_get_string_width(max_line_str) + 10;
if (line_num_w < 30) line_num_w = 30;
int text_start_x = padding + line_num_w + 5;
int available_width = win_w - text_start_x - padding - 10;
int visible_lines = (editor_h - 10) / EDITOR_LINE_HEIGHT;
int visible_lines = (editor_h - 10) / editor_line_height;
int max_display_lines = visible_lines;
int display_line = 0;
int line_idx = scroll_top;
while (line_idx < line_count && display_line < max_display_lines) {
int display_y = editor_y + 5 + display_line * EDITOR_LINE_HEIGHT;
int display_y = editor_y + 5 + display_line * editor_line_height;
// Line number
char line_num_str[16];
@ -315,14 +320,20 @@ static void editor_paint(ui_window_t win) {
while ((char_idx < text_len || (text_len == 0 && first_pass)) && display_line < max_display_lines) {
first_pass = 0;
int current_display_y = editor_y + 5 + display_line * EDITOR_LINE_HEIGHT;
int current_display_y = editor_y + 5 + display_line * editor_line_height;
char segment[256];
int segment_len = 0;
int segment_start = char_idx;
while (char_idx < text_len && segment_len < max_chars_per_line) {
segment[segment_len++] = text[char_idx++];
while (char_idx < text_len && segment_len < 254) {
segment[segment_len] = text[char_idx];
segment[segment_len + 1] = 0;
if (ui_get_string_width(segment) > available_width) {
break;
}
segment_len++;
char_idx++;
}
segment[segment_len] = 0;
@ -354,9 +365,14 @@ static void editor_paint(ui_window_t win) {
} else if (cursor_col == text_len && segment_end == text_len) {
draw_cursor = 1;
}
if (draw_cursor) {
int cursor_x = text_start_x + ((cursor_col - segment_start) * EDITOR_CHAR_WIDTH);
ui_draw_rect(win, cursor_x, current_display_y, 2, 10, COLOR_WHITE);
char before_cursor[256];
int len_before = cursor_col - segment_start;
for(int i=0; i<len_before; i++) before_cursor[i] = segment[i];
before_cursor[len_before] = 0;
int cursor_x = text_start_x + ui_get_string_width(before_cursor);
ui_draw_rect(win, cursor_x, current_display_y, 2, editor_line_height - 4, COLOR_WHITE);
}
}