handle setting the terminal size properly

1 files changed, 31 insertions, 2 deletions

diff --git a/display.c b/display.c
index 9f3a756..c9fbad9 100644
--- a/display.c
+++ b/display.c
@@ -4,14 +4,43 @@
 
 void runes_display_init(RunesTerm *t)
 {
+    cairo_font_extents_t extents;
+
     cairo_select_font_face(t->cr, "monospace", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
     cairo_set_font_size(t->cr, 14.0);
     cairo_set_source_rgb(t->cr, 0.0, 0.0, 1.0);
-    cairo_move_to(t->cr, 0.0, 14.0);
+
+    cairo_font_extents(t->cr, &extents);
+    cairo_move_to(t->cr, 0.0, extents.ascent);
+
+    runes_pty_backend_set_window_size(t);
+}
+
+static void runes_display_get_font_dimensions(RunesTerm *t, double *fontx, double *fonty)
+{
+    cairo_font_extents_t extents;
+
+    cairo_font_extents(t->cr, &extents);
+
+    *fontx = extents.max_x_advance;
+    *fonty = extents.height;
+}
+
+void runes_display_get_term_size(RunesTerm *t, int *row, int *col, int *xpixel, int *ypixel)
+{
+    double fontx, fonty;
+    runes_window_backend_get_size(t, xpixel, ypixel);
+    runes_display_get_font_dimensions(t, &fontx, &fonty);
+    *row = (int)(*ypixel / fonty);
+    *col = (int)(*xpixel / fontx);
 }
 
 void runes_display_glyph(RunesTerm *t, char *buf, size_t len)
 {
+    cairo_font_extents_t extents;
+
+    cairo_font_extents(t->cr, &extents);
+
     if (len) {
         char *nl;
         buf[len] = '\0';
@@ -21,7 +50,7 @@ void runes_display_glyph(RunesTerm *t, char *buf, size_t len)
             cairo_show_text(t->cr, buf);
             buf = nl + 1;
             cairo_get_current_point(t->cr, &x, &y);
-            cairo_move_to(t->cr, 0.0, y + 14.0);
+            cairo_move_to(t->cr, 0.0, y + extents.height);
         }
         cairo_show_text(t->cr, buf);
         /* we have to flush manually because XNextEvent (which normally handles