1 files changed, 143 insertions, 0 deletions
diff --git a/dot_config/hypr/scripts/executable_herdr-smart-nav b/dot_config/hypr/scripts/executable_herdr-smart-nav
new file mode 100644
index 0000000..36d27aa
--- /dev/null
+++ b/dot_config/hypr/scripts/executable_herdr-smart-nav
@@ -0,0 +1,143 @@
+#!/usr/bin/env bash
+
+set -u
+
+direction="${1:-}"
+terminal_pid="${2:-}"
+
+case "$direction" in
+  left|right|up|down)
+    ;;
+  *)
+    printf 'usage: %s <left|right|up|down> <terminal-pid>\n' "$0" >&2
+    exit 2
+    ;;
+esac
+
+# Window titles can change with the workspace. Find a foreground Herdr
+# process belonging to this terminal instead of relying on its title.
+is_in_terminal() {
+  local pid="$1"
+  local parent
+
+  while [[ "$pid" =~ ^[0-9]+$ && "$pid" -gt 1 ]]; do
+    [[ "$pid" == "$terminal_pid" ]] && return 0
+    parent="$(ps -o ppid= -p "$pid" 2>/dev/null | tr -d '[:space:]')"
+    [[ -n "$parent" && "$parent" != "$pid" ]] || return 1
+    pid="$parent"
+  done
+
+  return 1
+}
+
+herdr_found=false
+if [[ "$terminal_pid" =~ ^[0-9]+$ ]]; then
+  while read -r pid process_group foreground_group; do
+    # The server has no foreground terminal; a suspended client is not active.
+    if [[ "$foreground_group" -gt 0 && "$process_group" == "$foreground_group" ]] &&
+        is_in_terminal "$pid"; then
+      herdr_found=true
+      break
+    fi
+  done < <(ps -C herdr -o pid=,pgid=,tpgid= 2>/dev/null)
+fi
+
+if [[ "$herdr_found" != true ]]; then
+  printf 'not-herdr\n'
+  exit
+fi
+
+herdr_bin="${HERDR_BIN_PATH:-$HOME/.local/share/mise/installs/herdr/latest/herdr}"
+
+if [[ ! -x "$herdr_bin" ]]; then
+  printf 'hyprland\n'
+  exit
+fi
+
+handled() {
+  printf 'handled\n'
+  exit
+}
+
+fall_through() {
+  printf 'hyprland\n'
+  exit
+}
+
+current="$("$herdr_bin" pane current --current 2>/dev/null)" || {
+  fall_through
+}
+
+pane_id="$(jq -r '.result.pane.pane_id // empty' <<<"$current")"
+
+if [[ -z "$pane_id" ]]; then
+  fall_through
+fi
+
+process_info="$(
+  "$herdr_bin" pane process-info --pane "$pane_id" 2>/dev/null || true
+)"
+
+nvim_pid="$(
+  jq -r '
+    [
+      (.result.process_info.foreground_processes // [])[]
+      | select(
+          ((.name // "") | ascii_downcase) == "nvim"
+          or ((.name // "") | ascii_downcase) == "vim"
+        )
+      | .pid
+    ][0] // empty
+  ' <<<"$process_info" 2>/dev/null
+)"
+
+if [[ -n "$nvim_pid" ]]; then
+  safe_pane_id="${pane_id//[^a-zA-Z0-9_.-]/_}"
+  runtime_dir="${XDG_RUNTIME_DIR:-/tmp}"
+
+  socket_path="$runtime_dir/nvim-hypr-nav-pane-$safe_pane_id.sock"
+
+  response="$(
+    printf 'nav:%s\n' "$direction" |
+      socat -T 0.25 -,ignoreeof "UNIX-CONNECT:$socket_path" 2>/dev/null ||
+      true
+  )"
+
+  if [[ "$response" == *success* ]]; then
+    handled
+  fi
+fi
+
+neighbor="$(
+  "$herdr_bin" pane neighbor \
+    --pane "$pane_id" \
+    --direction "$direction" \
+    2>/dev/null
+)" || {
+  fall_through
+}
+
+# A zoomed pane deliberately falls through to Hyprland. Do not expose or
+# navigate to another Herdr pane.
+if jq -e '.result.neighbor.layout.zoomed == true' \
+    >/dev/null 2>&1 <<<"$neighbor"; then
+  fall_through
+fi
+
+neighbor_id="$(
+  jq -r '.result.neighbor.neighbor_pane_id // empty' <<<"$neighbor"
+)"
+
+# Herdr 0.7.5 returns the current pane itself when there is no neighbour.
+if [[ -z "$neighbor_id" || "$neighbor_id" == "$pane_id" ]]; then
+  fall_through
+fi
+
+if "$herdr_bin" pane focus \
+    --pane "$pane_id" \
+    --direction "$direction" \
+    >/dev/null 2>&1; then
+  handled
+else
+  fall_through
+fi