mirror of
https://github.com/BoredDevNL/BoredOS.git
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app: Resizable txtedit.c
This commit is contained in:
boreddevnl
parent
8fd0605f85
commit
a62b22faa9
1 changed files with 186 additions and 68 deletions
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@ -16,8 +16,7 @@
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#define COLOR_DKGRAY 0xFF808080
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#define COLOR_WHITE 0xFFFFFFFF
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#define EDITOR_MAX_LINES 128
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#define EDITOR_MAX_LINE_LEN 256
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#define EDITOR_MAX_LINE_LEN 512
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static int editor_line_height = 16;
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typedef struct {
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@ -25,8 +24,9 @@ typedef struct {
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int length;
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} EditorLine;
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static EditorLine lines[EDITOR_MAX_LINES];
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static int line_count = 1;
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static EditorLine **lines = NULL;
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static int line_count = 0;
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static int line_capacity = 0;
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static int cursor_line = 0;
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static int cursor_col = 0;
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static int scroll_top = 0;
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@ -81,14 +81,39 @@ static void editor_resolve_path(const char *input, char *out, int max_len) {
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editor_strncat(out, input, max_len);
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}
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static void add_line(int at) {
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if (line_count >= line_capacity) {
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int new_capacity = (line_capacity == 0) ? 128 : line_capacity * 2;
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EditorLine **new_lines = (EditorLine**)realloc(lines, new_capacity * sizeof(EditorLine*));
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if (!new_lines) return;
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lines = new_lines;
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line_capacity = new_capacity;
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}
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for (int i = line_count; i > at; i--) lines[i] = lines[i - 1];
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lines[at] = (EditorLine*)malloc(sizeof(EditorLine));
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lines[at]->length = 0;
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lines[at]->content[0] = 0;
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line_count++;
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}
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static void remove_line(int at) {
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if (at < 0 || at >= line_count) return;
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free(lines[at]);
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for (int i = at; i < line_count - 1; i++) lines[i] = lines[i + 1];
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line_count--;
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}
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static void editor_clear_all(void) {
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for (int i = 0; i < EDITOR_MAX_LINES; i++) {
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for (int j = 0; j < EDITOR_MAX_LINE_LEN; j++) {
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lines[i].content[j] = 0;
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if (lines) {
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for (int i = 0; i < line_count; i++) {
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if (lines[i]) free(lines[i]);
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}
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lines[i].length = 0;
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free(lines);
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}
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line_count = 1;
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lines = NULL;
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line_count = 0;
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line_capacity = 0;
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add_line(0);
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cursor_line = 0;
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cursor_col = 0;
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scroll_top = 0;
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@ -96,21 +121,110 @@ static void editor_clear_all(void) {
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file_modified = 0;
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}
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static int count_display_lines(int physical_line, int available_width) {
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if (physical_line < 0 || physical_line >= line_count) return 0;
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const char *text = lines[physical_line]->content;
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int text_len = lines[physical_line]->length;
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if (text_len == 0) return 1;
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int count = 0;
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int char_idx = 0;
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while (char_idx < text_len) {
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char segment[256];
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int segment_len = 0;
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int segment_start = char_idx;
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while (char_idx < text_len && segment_len < 254) {
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segment[segment_len] = text[char_idx];
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segment[segment_len + 1] = 0;
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if (ui_get_string_width(segment) > available_width) break;
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segment_len++;
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char_idx++;
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}
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if (char_idx < text_len && segment_len > 0) {
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int last_space = -1;
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for (int i = segment_len - 1; i >= 0; i--) {
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if (segment[i] == ' ') { last_space = i; break; }
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}
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if (last_space > 0) char_idx = segment_start + last_space + 1;
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}
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count++;
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}
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return count;
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}
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static void editor_ensure_cursor_visible(void) {
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int header_h = 32;
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int footer_h = 24;
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int editor_h = win_h - header_h - footer_h;
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int padding = 4;
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if (editor_line_height == 0) editor_line_height = ui_get_font_height();
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char max_line_str[16];
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itoa(line_count, max_line_str);
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int line_num_w = ui_get_string_width(max_line_str) + 10;
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if (line_num_w < 30) line_num_w = 30;
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int text_start_x = padding + line_num_w + 5;
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int available_width = win_w - text_start_x - padding - 10;
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if (editor_line_height <= 0) editor_line_height = ui_get_font_height();
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if (editor_line_height < 10) editor_line_height = 16;
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int visible_display_lines = (editor_h - 10) / editor_line_height;
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int visible_lines = (editor_h - 10) / editor_line_height;
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if (cursor_line < scroll_top) {
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scroll_top = cursor_line;
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int cursor_disp = 0;
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for (int i = 0; i < cursor_line; i++) {
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cursor_disp += count_display_lines(i, available_width);
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}
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const char *text = lines[cursor_line]->content;
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int text_len = lines[cursor_line]->length;
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int char_idx = 0;
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int segment_idx = 0;
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while (char_idx < cursor_col) {
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char segment[256];
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int segment_len = 0;
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int segment_start = char_idx;
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while (char_idx < text_len && segment_len < 254) {
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segment[segment_len] = text[char_idx];
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segment[segment_len + 1] = 0;
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if (ui_get_string_width(segment) > available_width) break;
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segment_len++;
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char_idx++;
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}
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if (char_idx < text_len && segment_len > 0) {
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int last_space = -1;
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for (int i = segment_len - 1; i >= 0; i--) {
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if (segment[i] == ' ') { last_space = i; break; }
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}
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if (last_space > 0) {
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int end_of_seg = segment_start + last_space + 1;
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if (cursor_col < end_of_seg) break;
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char_idx = end_of_seg;
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}
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}
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if (char_idx <= cursor_col) segment_idx++;
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else break;
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}
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cursor_disp += segment_idx;
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int scroll_disp = 0;
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for (int i = 0; i < scroll_top; i++) {
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scroll_disp += count_display_lines(i, available_width);
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}
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if (cursor_disp < scroll_disp) {
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while (scroll_top > 0) {
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scroll_top--;
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int new_scroll_disp = 0;
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for (int i = 0; i < scroll_top; i++) new_scroll_disp += count_display_lines(i, available_width);
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if (cursor_disp >= new_scroll_disp) break;
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}
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} else if (cursor_disp >= scroll_disp + visible_display_lines) {
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// Move scroll_top down until cursor is visible
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while (scroll_top < cursor_line) {
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scroll_top++;
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int new_scroll_disp = 0;
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for (int i = 0; i < scroll_top; i++) new_scroll_disp += count_display_lines(i, available_width);
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if (cursor_disp < new_scroll_disp + visible_display_lines) break;
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}
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if (cursor_line >= scroll_top + visible_lines) {
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scroll_top = cursor_line - visible_lines + 1;
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}
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}
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@ -138,24 +252,24 @@ void editor_open_file(const char *filename) {
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int line = 0;
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int col = 0;
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for (int i = 0; i < bytes_read && line < EDITOR_MAX_LINES; i++) {
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for (int i = 0; i < bytes_read; i++) {
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char ch = buffer[i];
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if (ch == '\n') {
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lines[line].content[col] = 0;
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lines[line].length = col;
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line++;
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lines[line]->content[col] = 0;
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lines[line]->length = col;
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add_line(++line);
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col = 0;
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} else if (ch != '\r') {
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if (col < EDITOR_MAX_LINE_LEN - 1) {
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lines[line].content[col] = ch;
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lines[line]->content[col] = ch;
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col++;
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}
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}
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}
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if (col > 0) {
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lines[line].content[col] = 0;
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lines[line].length = col;
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lines[line]->content[col] = 0;
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lines[line]->length = col;
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line++;
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}
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@ -170,7 +284,7 @@ static void editor_save_file(void) {
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if (fd < 0) return;
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for (int i = 0; i < line_count; i++) {
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sys_write_fs(fd, lines[i].content, lines[i].length);
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sys_write_fs(fd, lines[i]->content, lines[i]->length);
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sys_write_fs(fd, "\n", 1);
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}
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sys_close(fd);
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@ -178,35 +292,37 @@ static void editor_save_file(void) {
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}
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static void editor_insert_char(int legacy, uint32_t codepoint) {
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if (cursor_line >= EDITOR_MAX_LINES) return;
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EditorLine *line = &lines[cursor_line];
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EditorLine *line = lines[cursor_line];
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if (legacy == '\n') {
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if (line_count >= EDITOR_MAX_LINES) return;
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for (int j = line_count; j > cursor_line; j--) {
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lines[j] = lines[j - 1];
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}
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line_count++;
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add_line(cursor_line + 1);
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for (int k = 0; k < EDITOR_MAX_LINE_LEN; k++) {
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lines[cursor_line + 1].content[k] = 0;
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}
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lines[cursor_line + 1].length = 0;
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int current_len = lines[cursor_line].length;
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int current_len = lines[cursor_line]->length;
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int new_len = current_len - cursor_col;
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for (int i = 0; i < new_len; i++) {
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lines[cursor_line + 1].content[i] = lines[cursor_line].content[cursor_col + i];
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lines[cursor_line + 1]->content[i] = lines[cursor_line]->content[cursor_col + i];
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}
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lines[cursor_line + 1].content[new_len] = 0;
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lines[cursor_line + 1].length = new_len;
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lines[cursor_line + 1]->content[new_len] = 0;
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lines[cursor_line + 1]->length = new_len;
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lines[cursor_line].content[cursor_col] = 0;
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lines[cursor_line].length = cursor_col;
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lines[cursor_line]->content[cursor_col] = 0;
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lines[cursor_line]->length = cursor_col;
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cursor_line++;
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cursor_col = 0;
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} else if (legacy == KEY_TAB) {
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for (int i = 0; i < 4; i++) {
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if (line->length < EDITOR_MAX_LINE_LEN - 1) {
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for (int j = line->length; j > cursor_col; j--) {
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line->content[j] = line->content[j - 1];
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}
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line->content[cursor_col] = ' ';
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line->length++;
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cursor_col++;
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}
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}
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line->content[line->length] = 0;
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} else if (legacy == KEY_BACKSPACE) {
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if (cursor_col > 0) {
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const char *prev = text_prev_utf8(line->content, line->content + cursor_col);
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@ -219,26 +335,21 @@ static void editor_insert_char(int legacy, uint32_t codepoint) {
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cursor_col -= char_len;
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line->content[line->length] = 0;
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} else if (cursor_line > 0) {
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EditorLine *prev = &lines[cursor_line - 1];
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int merge_point = prev->length;
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int prev_idx = cursor_line - 1;
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int merge_point = lines[prev_idx]->length;
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int i = 0;
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while (i < line->length && (merge_point + i) < EDITOR_MAX_LINE_LEN - 1) {
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prev->content[merge_point + i] = line->content[i];
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lines[prev_idx]->content[merge_point + i] = line->content[i];
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i++;
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}
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prev->content[merge_point + i] = 0;
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prev->length = merge_point + i;
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for (int j = cursor_line; j < line_count - 1; j++) {
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lines[j] = lines[j + 1];
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}
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lines[line_count - 1].length = 0;
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lines[line_count - 1].content[0] = 0;
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lines[prev_idx]->content[merge_point + i] = 0;
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lines[prev_idx]->length = merge_point + i;
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int old_line = cursor_line;
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cursor_line--;
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cursor_col = merge_point;
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line_count--;
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remove_line(old_line);
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}
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} else if (codepoint >= 32 && codepoint != 127) {
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char utf8[4];
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@ -323,8 +434,8 @@ static void editor_paint(ui_window_t win) {
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line_num_str[str_len] = 0;
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ui_draw_string(win, padding + 4, display_y, line_num_str, COLOR_DKGRAY);
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const char *text = lines[line_idx].content;
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int text_len = lines[line_idx].length;
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const char *text = lines[line_idx]->content;
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int text_len = lines[line_idx]->length;
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int char_idx = 0;
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_Bool first_pass = 1;
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@ -332,11 +443,11 @@ static void editor_paint(ui_window_t win) {
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first_pass = 0;
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int current_display_y = editor_y + 5 + display_line * editor_line_height;
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char segment[256];
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char segment[EDITOR_MAX_LINE_LEN];
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int segment_len = 0;
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int segment_start = char_idx;
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while (char_idx < text_len && segment_len < 254) {
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while (char_idx < text_len && segment_len < EDITOR_MAX_LINE_LEN - 2) {
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segment[segment_len] = text[char_idx];
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segment[segment_len + 1] = 0;
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if (ui_get_string_width(segment) > available_width) {
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@ -423,27 +534,27 @@ static void editor_handle_key(int legacy, uint32_t codepoint, bool pressed) {
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if (legacy == KEY_UP) { // UP
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if (cursor_line > 0) {
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cursor_line--;
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if (cursor_col > lines[cursor_line].length) cursor_col = lines[cursor_line].length;
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if (cursor_col > lines[cursor_line]->length) cursor_col = lines[cursor_line]->length;
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if (cursor_line < scroll_top) scroll_top = cursor_line;
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}
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} else if (legacy == KEY_DOWN) { // DOWN
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if (cursor_line < line_count - 1) {
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cursor_line++;
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if (cursor_col > lines[cursor_line].length) cursor_col = lines[cursor_line].length;
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if (cursor_col > lines[cursor_line]->length) cursor_col = lines[cursor_line]->length;
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editor_ensure_cursor_visible();
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}
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} else if (legacy == KEY_LEFT) { // LEFT
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if (cursor_col > 0) {
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const char *prev = text_prev_utf8(lines[cursor_line].content, lines[cursor_line].content + cursor_col);
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cursor_col = (int)(prev - lines[cursor_line].content);
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const char *prev = text_prev_utf8(lines[cursor_line]->content, lines[cursor_line]->content + cursor_col);
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cursor_col = (int)(prev - lines[cursor_line]->content);
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} else if (cursor_line > 0) {
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cursor_line--;
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cursor_col = lines[cursor_line].length;
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cursor_col = lines[cursor_line]->length;
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}
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} else if (legacy == KEY_RIGHT) { // RIGHT
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if (cursor_col < lines[cursor_line].length) {
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const char *next = text_next_utf8(lines[cursor_line].content + cursor_col);
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cursor_col = (int)(next - lines[cursor_line].content);
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if (cursor_col < lines[cursor_line]->length) {
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const char *next = text_next_utf8(lines[cursor_line]->content + cursor_col);
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cursor_col = (int)(next - lines[cursor_line]->content);
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} else if (cursor_line < line_count - 1) {
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cursor_line++;
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cursor_col = 0;
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@ -469,6 +580,7 @@ static void editor_handle_click(int x, int y) {
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int main(int argc, char **argv) {
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ui_window_t win = ui_window_create("Text Editor", 100, 150, win_w, win_h);
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if (!win) return 1;
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ui_window_set_resizable(win, 1);
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editor_clear_all();
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if (argc > 1) {
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@ -490,6 +602,12 @@ int main(int argc, char **argv) {
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} else if (ev.type == GUI_EVENT_KEY) {
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editor_handle_key(ev.arg1, (uint32_t)ev.arg4, true);
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editor_paint(win);
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ui_mark_dirty(win, 0, 32, win_w, win_h - 32);
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} else if (ev.type == GUI_EVENT_RESIZE) {
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win_w = ev.arg1;
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win_h = ev.arg2;
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editor_ensure_cursor_visible();
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editor_paint(win);
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ui_mark_dirty(win, 0, 0, win_w, win_h);
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} else if (ev.type == GUI_EVENT_KEYUP) {
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editor_handle_key(ev.arg1, (uint32_t)ev.arg4, false);
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