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-rw-r--r--main/src/ui/util/helper.vala42
1 files changed, 42 insertions, 0 deletions
diff --git a/main/src/ui/util/helper.vala b/main/src/ui/util/helper.vala
index 049b2d07..2f2bb84d 100644
--- a/main/src/ui/util/helper.vala
+++ b/main/src/ui/util/helper.vala
@@ -203,4 +203,46 @@ public static string parse_add_markup(string s_, string? highlight_word, bool pa
return s;
}
+public int get_only_emoji_count(string markup_text) {
+ int emoji_no = 0;
+ int index_ref = 0;
+ unichar curchar = 0, altchar = 0;
+ bool last_was_emoji = false, last_was_modifier_base = false, last_was_keycap = false;
+ while (markup_text.get_next_char(ref index_ref, out curchar)) {
+ if (last_was_emoji && last_was_keycap && curchar == 0x20E3) {
+ // keycap sequence
+ continue;
+ }
+
+ last_was_keycap = false;
+
+ if (last_was_emoji && curchar == 0x200D && markup_text.get_next_char(ref index_ref, out curchar)) {
+ // zero width joiner
+ last_was_emoji = false;
+ emoji_no--;
+ }
+
+ if (last_was_emoji && last_was_modifier_base && Unicode.has_binary_property(curchar, Unicode.EMOJI_MODIFIER)) {
+ // still an emoji, but no longer a modifier base
+ last_was_modifier_base = false;
+ } else if (Unicode.has_binary_property(curchar, Unicode.EMOJI_PRESENTATION)) {
+ if (Unicode.has_binary_property(curchar, Unicode.EMOJI_MODIFIER_BASE)) {
+ last_was_modifier_base = true;
+ }
+ emoji_no++;
+ last_was_emoji = true;
+ } else if (curchar == ' ') {
+ last_was_emoji = false;
+ } else if (markup_text.get_next_char(ref index_ref, out altchar) && altchar == 0xFE0F) {
+ // U+FE0F = VARIATION SELECTOR-16
+ emoji_no++;
+ last_was_emoji = true;
+ last_was_keycap = (curchar >= 0x30 && curchar <= 0x39) || curchar == 0x23 || curchar == 0x2A;
+ } else {
+ return -1;
+ }
+ }
+ return emoji_no;
+}
+
}