allow specifying whether or not emoji are wide

vim says yes, weechat says no ¯\_(ツ)_/¯

4 files changed, 15 insertions, 7 deletions

diff --git a/src/screen.c b/src/screen.c
index b909cfb..dd1eccc 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -107,6 +107,11 @@ void vt100_screen_set_scrollback_length(VT100Screen *vt, int rows)
     vt->custom_scrollback_length = 1;
 }
 
+void vt100_screen_set_wide_emoji(VT100Screen *vt, int wide_emoji)
+{
+    vt->wide_emoji = wide_emoji;
+}
+
 int vt100_screen_process_string(VT100Screen *vt, char *buf, size_t len)
 {
     struct vt100_parser_state *state = vt->parser_state;
@@ -204,7 +209,7 @@ void vt100_screen_show_string_utf8(VT100Screen *vt, char *buf, size_t len)
         int width;
 
         uc = g_utf8_get_char(c);
-        width = vt100_char_width(uc);
+        width = vt100_char_width(uc, vt->wide_emoji);
 
         if (width == 0) {
             if (vt->grid->cur.col > 0) {
diff --git a/src/screen.h b/src/screen.h
index bd52d49..af48400 100644
--- a/src/screen.h
+++ b/src/screen.h
@@ -105,12 +105,14 @@ struct vt100_screen {
 
     unsigned int dirty: 1;
     unsigned int custom_scrollback_length: 1;
+    unsigned int wide_emoji: 1;
 };
 
 VT100Screen *vt100_screen_new(int rows, int cols);
 void vt100_screen_init(VT100Screen *vt);
 void vt100_screen_set_window_size(VT100Screen *vt, int rows, int cols);
 void vt100_screen_set_scrollback_length(VT100Screen *vt, int rows);
+void vt100_screen_set_wide_emoji(VT100Screen *vt, int wide_emoji);
 int vt100_screen_process_string(VT100Screen *vt, char *buf, size_t len);
 void vt100_screen_get_string_plaintext(
     VT100Screen *vt, struct vt100_loc *start, struct vt100_loc *end,
diff --git a/src/unicode-extra.c b/src/unicode-extra.c
index 69e5c76..b661aef 100644
--- a/src/unicode-extra.c
+++ b/src/unicode-extra.c
@@ -66,15 +66,15 @@ static struct vt100_char_range vt100_wide_emoji[] = {
 };
 
 static int vt100_is_zero_width(uint32_t codepoint);
-static int vt100_is_wide_char(uint32_t codepoint);
+static int vt100_is_wide_char(uint32_t codepoint, int wide_emoji);
 static int vt100_is_wide_emoji(uint32_t codepoint);
 
-int vt100_char_width(uint32_t codepoint)
+int vt100_char_width(uint32_t codepoint, int wide_emoji)
 {
     if (vt100_is_zero_width(codepoint)) {
         return 0;
     }
-    else if (vt100_is_wide_char(codepoint)) {
+    else if (vt100_is_wide_char(codepoint, wide_emoji)) {
         return 2;
     }
     else {
@@ -89,9 +89,10 @@ static int vt100_is_zero_width(uint32_t codepoint)
     return g_unichar_iszerowidth(codepoint) || codepoint == 0xAD;
 }
 
-static int vt100_is_wide_char(uint32_t codepoint)
+static int vt100_is_wide_char(uint32_t codepoint, int wide_emoji)
 {
-    return g_unichar_iswide(codepoint) || vt100_is_wide_emoji(codepoint);
+    return g_unichar_iswide(codepoint)
+        || (wide_emoji && vt100_is_wide_emoji(codepoint));
 }
 
 static int vt100_is_wide_emoji(uint32_t codepoint)
diff --git a/src/unicode-extra.h b/src/unicode-extra.h
index be3b28b..befec7a 100644
--- a/src/unicode-extra.h
+++ b/src/unicode-extra.h
@@ -3,6 +3,6 @@
 
 #include <stdint.h>
 
-int vt100_char_width(uint32_t codepoint);
+int vt100_char_width(uint32_t codepoint, int wide_emoji);
 
 #endif