report pixel mice capabilities in notcurses-info #2326

doc/man/man1/notcurses-info.1.md

@@ -79,7 +79,8 @@ The next five lines describe properties of the terminal environment:
 
 * The fourth line indicates the default background color, and whether that
   color is treated as transparent by the terminal (only **kitty** is known
-  to do this), and the default foreground color.
+  to do this), and the default foreground color. **pmouse** indicates
+  whether pixel-precise mouse events are supported.
 
 * The fifth line describes the available bitmap graphics. If Sixels are
   available, the maximum number of color registers and maximum Sixel

src/info/main.c

@@ -383,6 +383,7 @@ tinfo_debug_bitmaps(struct ncplane* n, const tinfo* ti, const char* indent){
   }else{
     ncplane_printf(n, "default bg 0x%06x", bg);
   }
+  tinfo_debug_cap(n, " pmouse", ti->pixelmice);
   finish_line(n);
   ncpixelimpl_e blit = notcurses_check_pixel_support(ncplane_notcurses(n));
   switch(blit){

src/lib/in.c

@@ -1148,6 +1148,8 @@ da1_attrs_cb(inputctx* ictx){
       }
     }else if(curattr == 28){
       ictx->initdata->rectangular_edits = true;
+    }else if(curattr == 29){
+      ictx->initdata->pixelmice = true;
     }
     if(!foundsixel){
       scrub_sixel_responses(ictx->initdata);

src/lib/in.h

@@ -81,6 +81,7 @@ struct initial_responses {
   unsigned kbdlevel;           // enabled kitty keyboard functions
   ncpalette palette;           // palette entries
   int maxpaletteread;          // maximum palette index read
+  bool pixelmice;              // have we pixel-based mice events?
 };
 
 // Blocking call. Waits until the input thread has processed all responses to

src/lib/termdesc.c

@@ -1346,6 +1346,7 @@ int interrogate_terminfo(tinfo* ti, FILE* out, unsigned utf8,
       ti->sixel_maxy = iresp->sixely;
       ti->sixel_maxx = iresp->sixelx;
     }
+    ti->pixelmice = iresp->pixelmice;
     if(iresp->rectangular_edits){
       if(grow_esc_table(ti, "\x1b[%p1%d;%p2%d;%p3%d;$z", ESCAPE_DECERA, &tablelen, &tableused)){
         goto err;

src/lib/termdesc.h

@@ -192,6 +192,7 @@ typedef struct tinfo {
   pthread_t gpmthread;       // thread handle for GPM watcher
   int gpmfd;                 // connection to GPM daemon
   char mouseproto;           // DECSET level (100x, '0', '2', '3')
+  bool pixelmice;            // we support pixel-accuracy for mice
 #ifdef __linux__
   int linux_fb_fd;           // linux framebuffer device fd
   char* linux_fb_dev;        // device corresponding to linux_fb_dev