Fallback to ascii mode instead of hanging if the terminal emulator doesn't…

config/config

@@ -262,8 +262,8 @@ crop_offset="center"
 
 # Image size
 # The image is half the terminal width by default.
-# --size half, px
-image_size="half"
+# --size auto, px
+image_size="auto"
 
 # Right gap between image and text
 # --gap num

fetch

@@ -280,8 +280,8 @@ crop_offset="center"
 
 # Image size
 # The image is half the terminal width by default.
-# --size half, px
-image_size="half"
+# --size auto, px
+image_size="auto"
 
 # Right gap between image and text
 # --gap num
@@ -1851,24 +1851,11 @@ getimage () {
         ;;
     esac
 
-    # If $img isn't a file, fallback to ascii mode.
-    if [ ! -f "$img" ]; then
-        # Fallback to ascii mode
-        image="ascii"
-        getascii
-
-        return
-    fi
-
-    # Get terminal lines and columns
-    columns=$(tput cols)
-    lines=$(tput lines)
-
     # Get terminal width and height
     printf "%b%s" '\033[14t'
 
     index=0
-    while IFS= read -s -r -n 1 char; do
+    while IFS= read -s -r -n 1 -t 0.25 char; do
         case "$index" in
             "0") [ "$char" == ";" ] && index=$((index + 1)) ;;
             "1") [ "$char" == ";" ] && index=$((index + 1)) || term_height="${term_height}${char}" ;;
@@ -1876,12 +1863,26 @@ getimage () {
         esac
     done
 
+    # If $img isn't a file or the terminal doesn't support xterm escape sequences,
+    # fallback to ascii mode.
+    if [ ! -f "$img" ] || [ -z "$term_height" ]; then
+        # Fallback to ascii mode
+        image="ascii"
+        getascii
+
+        return
+    fi
+
+    # Get terminal lines and columns
+    columns=$(tput cols)
+    lines=$(tput lines)
+
     # Calculate font size
     font_width=$((term_width / columns))
     font_height=$((term_height / lines))
 
     # Image size is half of the terminal
-    if [ "$image_size" == "half" ]; then
+    if [ "$image_size" == "auto" ]; then
         image_size=$((columns * font_width / 2))
 
         [ "$((term_height - term_height / 4))" -lt "$image_size" ] && \