text edit: text navigation.

src/utils/d_array.c

@@ -24,12 +24,35 @@ void u_d_arr_ptr_add(d_array_ptr_t *arr, void *ptr, int32_t idx) {
     memset(arr->arr + arr->capacity, 0, arr->capacity - new_capacity);
     arr->capacity = new_capacity;
   }
-  if (arr->fist_el == NULL) arr->fist_el = ptr;
+  if (arr->fist_el == NULL)
+    arr->fist_el = ptr;
   arr->last_el = ptr;
   arr->arr[idx] = ptr;
   arr->length = idx + 1;
 }
 
+void u_d_arr_ptr_remove_cb(d_array_ptr_t *arr, void *ptr, int32_t idx,
+                           u_d_arr_free_callback *callback) {
+  void *_ptr = NULL;
+  int _idx = idx;
+
+  if (idx > 0) {
+    _ptr = arr->arr[idx];
+  } else if (ptr != NULL) {
+    for (int i = 0; i < arr->length; i++) {
+      if (arr->arr[i] == ptr) {
+        _ptr = arr->arr[i];
+        _idx = i;
+      }
+    }
+  }
+
+  callback(_ptr);
+  arr->arr[_idx] = NULL;
+  arr->length--;
+  memmove(arr->arr[_idx], arr->arr[_idx+1], arr->length - _idx);
+}
+
 void u_d_arr_ptr_free(d_array_ptr_t *arr) {
   arr->capacity = 0;
   arr->length = 0;

src/utils/d_array.h

@@ -13,7 +13,7 @@ typedef struct d_array_ptr_t {
   void *last_el;
 } d_array_ptr_t;
 
-typedef void *u_d_arr_free_callback(void *arg);
+typedef void u_d_arr_free_callback(void *arg);
 
 void u_d_arr_ptr_init(d_array_ptr_t *arr, int32_t init_capacity);
 void u_d_arr_ptr_add(d_array_ptr_t *arr, void *ptr, int32_t idx);

src/utils/utf8.c

@@ -67,3 +67,20 @@ int32_t u_utf8_curs_printw(WINDOW *win, int32_t *y, int32_t *x,
   free(wline);
   return nsize;
 }
+
+wchar_t u_utf8_get_full_letter(int key, WINDOW *win) {
+  char long_key[3];
+  int short_val_len = 1;
+  wchar_t wkey;
+  long_key[0] = key;
+  if ((key & 0xC0) == 0xC0) {
+    long_key[1] = wgetch(win);
+    long_key[2] = '\0';
+    short_val_len++;
+  } else {
+    long_key[1] = '\0';
+  }
+  mbstowcs(&wkey, (const char *)&long_key, 2);
+
+  return wkey;
+}

src/utils/utf8.h

@@ -10,5 +10,6 @@ size_t       u_utf8_code_points_count(const char *s);
 int32_t      u_utf8_convert_to_wide(const char *utf8_str, wchar_t **restrict wide_str,
                              size_t *restrict o_len);
 int32_t      u_utf8_curs_printw(WINDOW *win, int32_t *y, int32_t *x, const char* utf8_str, int max_len, bool multiline);
+wchar_t      u_utf8_get_full_letter(int key, WINDOW *win);
 
 #endif

src/widget/input.c

@@ -16,10 +16,7 @@ bool w_input_default_key_action(w_cb_args_t *args) {
   w_g_el_t *g_el = args->active_el;
   w_input_t *input = g_el->element;
   int32_t start_pos = 0;
-  wchar_t w_key[2];
   app_t *app = args->app;
-  char long_key[3];
-  int short_val_len = 1;
 
   switch (key) {
   case KEY_BACKSPACE:
@@ -47,23 +44,14 @@ bool w_input_default_key_action(w_cb_args_t *args) {
   default:
     if (input->value_len == input->max_len)
       break;
-    long_key[0] = key;
-    input->value_len++;
-    if ((key & 0xC0) == 0xC0) {
-      long_key[1] = wgetch(app->win);
-      long_key[2] = '\0';
-      short_val_len++;
-    } else {
-      long_key[1] = '\0';
-    }
-    mbstowcs(w_key, (const char *)&long_key, 2);
+    key = u_utf8_get_full_letter(key, app->win);
     if (input->cur_pos > 0) {
       start_pos = input->value_len - input->cur_pos - 1;
       memmove(input->w_value + start_pos + 1, input->w_value + start_pos,
               sizeof(wchar_t) * (input->value_len - start_pos));
       input->w_value[start_pos] = key;
     } else {
-      input->w_value[input->value_len - 1] = w_key[0];
+      input->w_value[input->value_len - 1] = key;
       input->w_value[input->value_len] = '\0';
     }
     break;

src/windows/text_edit.c

@@ -8,6 +8,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <utils.h>
@@ -16,12 +17,14 @@
 #include "text_edit.h"
 #include "widget_core.h"
 
-/* TODO: create dynamic array of endline positions */
+/* TODO: расширять capacity линии при достижении лимита */
+/* TODO: нижняя панель-индикатор */
 
-/*
-  Массив d_array, состоящие из элементов, описывающий строки.
-  В строках записывать: длину, номер строки.
-*/
+static void line_destroy_cb(void *line_arg) {
+  w_te_ui_line_t *line = line_arg;
+  free(line->text);
+  free(line);
+}
 
 static void w_te_cb(w_cb_args_t *args) {
   app_t *app = args->app;
@@ -32,15 +35,46 @@ static void w_te_cb(w_cb_args_t *args) {
   switch (key) {
   case KEY_BACKSPACE:
   case KEY_DL:
-    fui->current_line->text[fui->current_line->len--] = 0;
+    if (fui->cur_line->len > 0) {
+      if (fui->cur_line_pos == fui->cur_line->len) {
+        fui->cur_line->text[--fui->cur_line_pos] = 0;
+      } else {
+        int n = fui->cur_line->len - fui->cur_line_pos + 1;
+        memmove(fui->cur_line->text + fui->cur_line_pos - 1,
+                fui->cur_line->text + fui->cur_line_pos, n * sizeof(wchar_t));
+        fui->cur_line_pos--;
+      }
+      fui->cur_line->len--;
+    } else {
+      if (fui->cur_line_idx > 0) {
+        u_d_arr_ptr_remove_cb(&(fui->lines_arr), fui->cur_line,
+                              fui->cur_line_idx, &line_destroy_cb);
+        fui->cur_line = fui->lines_arr.arr[--fui->cur_line_idx];
+        fui->cur_line_pos = fui->cur_line->len;
+      }
+    }
     break;
   case KEY_UP:
-    fui->cur_shift_pos.y--;
-    wchar_t *nl_ptr = NULL;
-    wchar_t *line_start = fui->line;
+    if (fui->cur_line_idx > 0) {
+      fui->cur_line = fui->lines_arr.arr[--fui->cur_line_idx];
+      fui->cur_line_pos = fui->cur_line->len;
+    }
     break;
   case KEY_DOWN:
-    fui->cur_shift_pos.y++;
+    if (fui->lines_arr.arr[fui->cur_line_idx + 1] != NULL) {
+      fui->cur_line = fui->lines_arr.arr[++fui->cur_line_idx];
+      fui->cur_line_pos = fui->cur_line->len;
+    }
+    break;
+  case KEY_LEFT:
+    if (fui->cur_line_pos > 0) {
+      fui->cur_line_pos--;
+    }
+    break;
+  case KEY_RIGHT:
+    if (fui->cur_line_pos < fui->cur_line->len) {
+      fui->cur_line_pos++;
+    }
     break;
   case '\n':
     new_line = malloc(sizeof(w_te_ui_line_t));
@@ -48,13 +82,23 @@ static void w_te_cb(w_cb_args_t *args) {
     new_line->capacity = new_line->len = INBUFSIZE;
     new_line->text[0] = 0;
     new_line->len = 0;
-
     u_d_array_append(&(fui->lines_arr), new_line, sizeof(w_te_ui_line_t));
-    fui->current_line = new_line;
+    fui->cur_line = new_line;
+    fui->cur_line_idx++;
+    fui->cur_line_pos = 0;
     break;
   default:
-    fui->current_line->text[fui->current_line->len++] = key;
-    fui->current_line->text[fui->current_line->len] = 0;
+    key = u_utf8_get_full_letter(key, app->win);
+    if (fui->cur_line_pos == fui->cur_line->len) {
+      fui->cur_line->text[fui->cur_line_pos++] = key;
+      fui->cur_line->text[fui->cur_line_pos] = 0;
+    } else {
+      int n = fui->cur_line->len - fui->cur_line_pos + 1;
+      memmove(fui->cur_line->text + fui->cur_line_pos + 1,
+              fui->cur_line->text + fui->cur_line_pos, n * sizeof(wchar_t));
+      fui->cur_line->text[fui->cur_line_pos++] = key;
+    }
+    fui->cur_line->len++;
   }
 }
 
@@ -127,19 +171,16 @@ w_te_ui_t *w_te_init_win(app_t *app) {
   wcsncpy(app->top_text, top_text, top_text_len);
   app->top_text[top_text_len] = 0;
   u_d_arr_ptr_init(&(fui->lines_arr), INBUFSIZE);
-  fui->current_line = malloc(sizeof(w_te_ui_line_t));
-  fui->current_line->text = malloc(INBUFSIZE * sizeof(wchar_t));
-  fui->current_line->len = 0;
-  fui->current_line->capacity = INBUFSIZE;
-  u_d_array_append(&(fui->lines_arr), fui->current_line, sizeof(w_te_ui_line_t));
+  fui->cur_line = malloc(sizeof(w_te_ui_line_t));
+  fui->cur_line->text = malloc(INBUFSIZE * sizeof(wchar_t));
+  fui->cur_line->len = 0;
+  fui->cur_line->capacity = INBUFSIZE;
+  u_d_array_append(&(fui->lines_arr), fui->cur_line, sizeof(w_te_ui_line_t));
+  fui->cur_line_idx = 0;
   return fui;
 }
 
-void w_te_reset(w_te_ui_t *fui) {
-  fui->line[0] = 0;
-  fui->cur_shift_pos.x = 0;
-  fui->cur_shift_pos.y = 0;
-}
+void w_te_reset(w_te_ui_t *fui) { fui->cur_line_pos = 0; }
 
 void w_te_reset_app(void *app) {
   app_t *_app = app;
@@ -165,8 +206,6 @@ void w_te_draw(w_te_ui_t *fui) {
     mvwprintw(win, p_y + i, p_x, "%*s", fui->w.sz.x, "");
   }
 
-  wchar_t *cur_ptr = fui->line;
-  wchar_t *nl_ptr = wcschr(cur_ptr, '\n');
   w_te_ui_line_t *line_arr_el = NULL;
 
   if (fui->lines_arr.length > 0) {
@@ -176,8 +215,9 @@ void w_te_draw(w_te_ui_t *fui) {
     }
   }
 
-  fui->cur_abs_pos.y = p_y;
-  fui->cur_abs_pos.x = p_x;
+  p_y--;
+
+  wmove(win, fui->cur_line_idx, fui->cur_line_pos);
 
   p_x = 1;
 

src/windows/text_edit.h

@@ -22,18 +22,10 @@ typedef struct {
 typedef struct {
   w_t w;
   WINDOW         *win;
-  wchar_t line[INBUFSIZE * 10];
-  int line_cur_pos;
-  struct {
-    int x;
-    int y;
-  } cur_shift_pos;
-  struct {
-    int x;
-    int y;
-  } cur_abs_pos;
   p_file_t       *file_ptr;
-  w_te_ui_line_t *current_line;
+  w_te_ui_line_t *cur_line;
+  int             cur_line_idx;
+  int             cur_line_pos;
   d_array_ptr_t lines_arr;
 } w_te_ui_t;
 
@@ -42,5 +34,6 @@ void w_te_destroy(w_te_ui_t **fui);
 void w_te_reset(w_te_ui_t *fl_ui);
 w_te_ui_t *w_te_init(WINDOW **win, w_t *w_parent);
 w_te_ui_t *w_te_init_win(app_t *app);
+void u_d_arr_ptr_remove_cb(d_array_ptr_t *arr, void *ptr, int32_t idx, u_d_arr_free_callback *callback);
 
 #endif