uc_is_grapheme_break() ought be evaluated across the EGC #2364

src/demo/whiteout.c

@@ -247,15 +247,10 @@ dostring(struct ncplane* n, const char** s, uint32_t rgb,
       continue;
     }
     size_t ulen = 0;
-    int r;
-    if(wcwidth(wcs) <= (int)(maxx - x)){
-      if((r = ncplane_putegc(n, &(*s)[idx], &ulen)) <= 0){
-        return -1;
-      }
-    }else{
-      if((r = ncplane_putchar(n, '#')) < 1){
-        return -1;
-      }
+    int r = 0;
+    int w;
+    if((r = ncplane_putegc(n, &(*s)[idx], &ulen)) <= 0){
+      return 0;
     }
     ncplane_cursor_yx(n, &y, &x);
     idx += ulen;
@@ -406,6 +401,7 @@ int witherworm_demo(struct notcurses* nc){
     "Jeg kan spise glas, det gør ikke ondt på mig",
     "㎚㎛㎜㎝㎞㎟㎠㎡㎢㎣㎤㎥㎦㎕㎖㎗㎘㏄㎰㎱㎲㎳㎍㎎㎏㎅㎆㏔㎇㎐㎑㎒㎓㎔㎮㎯",
     "Æ ka æe glass uhen at det go mæ naue",
+    // FIXME this one
     "က္ယ္ဝန္တော္၊က္ယ္ဝန္မ မ္ယက္စားနုိင္သည္။ ၎က္ရောင္ ထိခုိက္မ္ဟု မရ္ဟိပာ။",
     "ကျွန်တော် ကျွန်မ မှန်စားနိုင်တယ်။ ၎င်းကြောင့် ထိခိုက်မှုမရှိပါ။ ",
     "Tôi có thể ăn thủy tinh mà không hại gì",

src/lib/egcpool.h

@@ -136,7 +136,9 @@ utf8_egc_len(const char* gcluster, int* colcount){
     }
     ret += r;
     gcluster += r;
-    prevw = wc;
+    if(!prevw){
+      prevw = wc;
+    }
   }while(r);
   // FIXME what if injoin is set? incomplete EGC!
   return ret;

src/lib/notcurses.c

@@ -1752,6 +1752,7 @@ int ncplane_putc_yx(ncplane* n, int y, int x, const nccell* c){
 int ncplane_putegc_yx(ncplane* n, int y, int x, const char* gclust, size_t* sbytes){
   int cols;
   int bytes = utf8_egc_len(gclust, &cols);
+fprintf(stderr, "BYTES: %d COLS: %d [%s]\n", bytes, cols, gclust);
   if(bytes < 0){
     return -1;
   }