Use my_wcwidth()+my_wcswidth() instead of system’s wcwdith()+wcswidth()

But not that these functions map to the system’s versions if foot was
configured with ‘-Dsystem-wcwidth’.

csi.c

@@ -24,6 +24,7 @@
 #include "vt.h"
 #include "xmalloc.h"
 #include "xsnprintf.h"
+#include "my-wcwidth.h"
 
 #define UNHANDLED()        LOG_DBG("unhandled: %s", csi_as_string(term, final, -1))
 #define UNHANDLED_SGR(idx) LOG_DBG("unhandled: %s", csi_as_string(term, 'm', idx))
@@ -742,7 +743,7 @@ csi_dispatch(struct terminal *term, uint8_t final)
                 int count = vt_param_get(term, 0, 1);
                 LOG_DBG("REP: '%lc' %d times", (wint_t)term->vt.last_printed, count);
 
-                const int width = wcwidth(term->vt.last_printed);
+                const int width = my_wcwidth(term->vt.last_printed);
                 if (width > 0) {
                     for (int i = 0; i < count; i++)
                         term_print(term, term->vt.last_printed, width);

ime.c

@@ -15,6 +15,7 @@
 #include "util.h"
 #include "wayland.h"
 #include "xmalloc.h"
+#include "my-wcwidth.h"
 
 static void
 enter(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
@@ -178,7 +179,7 @@ done(void *data, struct zwp_text_input_v3 *zwp_text_input_v3,
     size_t widths[wchars + 1];
 
     for (size_t i = 0; i < wchars; i++) {
-        int width = max(wcwidth(seat->ime.preedit.text[i]), 1);
+        int width = max(my_wcwidth(seat->ime.preedit.text[i]), 1);
         widths[i] = width;
         cell_count += width;
     }

render.c

@@ -40,6 +40,7 @@
 #include "url-mode.h"
 #include "util.h"
 #include "xmalloc.h"
+#include "my-wcwidth.h"
 
 #define TIME_SCROLL_DAMAGE 0
 
@@ -627,7 +628,7 @@ render_cell(struct terminal *term, pixman_image_t *pix,
             if (single != NULL) {
                 glyph_count = 1;
                 glyphs = &single;
-                cell_cols = single->cols;
+                cell_cols = my_wcwidth(base);
             }
         }
 
@@ -661,7 +662,7 @@ render_cell(struct terminal *term, pixman_image_t *pix,
             } else {
                 glyph_count = 1;
                 glyphs = &single;
-                cell_cols = single->cols;
+                cell_cols = my_wcwidth(base);
             }
         }
     }
@@ -1414,7 +1415,7 @@ render_ime_preedit_for_seat(struct terminal *term, struct seat *seat,
         if (cell->wc >= CELL_SPACER)
             continue;
 
-        int width = max(1, wcwidth(cell->wc));
+        int width = max(1, my_wcwidth(cell->wc));
         if (col_idx + i + width > term->cols)
             break;
 
@@ -2854,10 +2855,10 @@ render_search_box(struct terminal *term)
     /* Calculate the width of each character */
     int widths[text_len + 1];
     for (size_t i = 0; i < text_len; i++)
-        widths[i] = max(0, wcwidth(text[i]));
+        widths[i] = max(0, my_wcwidth(text[i]));
     widths[text_len] = 0;
 
-    const size_t total_cells = wcswidth(text, text_len);
+    const size_t total_cells = my_wcswidth(text, text_len);
     const size_t wanted_visible_cells = max(20, total_cells);
 
     xassert(term->scale >= 1);
@@ -3288,7 +3289,7 @@ render_urls(struct terminal *term)
         int cols = 0;
 
         for (size_t i = 0; i <= wcslen(label); i++) {
-            int _cols = wcswidth(label, i);
+            int _cols = my_wcswidth(label, i);
 
             if (_cols == (size_t)-1)
                 continue;

vt.c

@@ -19,6 +19,7 @@
 #include "osc.h"
 #include "util.h"
 #include "xmalloc.h"
+#include "my-wcwidth.h"
 
 #define UNHANDLED() LOG_DBG("unhandled: %s", esc_as_string(term, final))
 
@@ -619,7 +620,7 @@ chain_key(uint32_t old_key, uint32_t new_wc)
 static void
 action_utf8_print(struct terminal *term, wchar_t wc)
 {
-    int width = wcwidth(wc);
+    int width = my_wcwidth(wc);
     const bool grapheme_clustering = term->conf->tweak.grapheme_shaping;
 
 #if !defined(FOOT_GRAPHEME_CLUSTERING)
@@ -672,7 +673,7 @@ action_utf8_print(struct terminal *term, wchar_t wc)
         }
 #endif
 
-        int base_width = wcwidth(base);
+        int base_width = my_wcwidth(base);
         if (base_width > 0) {
             term->grid->cursor.point.col = col;
             term->grid->cursor.lcf = false;
@@ -686,7 +687,7 @@ action_utf8_print(struct terminal *term, wchar_t wc)
                     term->fonts[0], base, wc, &base_from_primary,
                     &comb_from_primary, &pre_from_primary);
 
-                int precomposed_width = wcwidth(precomposed);
+                int precomposed_width = my_wcwidth(precomposed);
 
                 /*
                  * Only use the pre-composed character if: