Add MangoWM configuration and scripts for window management on scrolling layout

mango/scripts/resize.sh

@@ -0,0 +1,130 @@
+#!/bin/sh
+set -eu
+
+# 1️⃣  Presets
+PRESETS=" 0.15 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00"
+
+# Per-window saved-proportion directory
+PROPORTION_DIR="${XDG_RUNTIME_DIR:-/tmp}/mango-resize"
+
+# 2️⃣  Helper: abort with a clear message if a required binary is missing
+need_cmd() {
+    command -v "$1" >/dev/null 2>&1 || {
+        printf "❌ Required command '%s' not found in PATH. Install it first.\n" "$1" >&2
+        exit 127
+    }
+}
+need_cmd mmsg
+need_cmd jq
+need_cmd awk
+need_cmd wc
+need_cmd sed
+
+# 3️⃣  Get the *currently focused* client.
+client_json=$(mmsg get focusing-client || true)
+
+# 3a️⃣ Extract the window's unique id (used as the per-window state key)
+win_id=$(printf '%s' "$client_json" | jq -r '.id // empty' || true)
+if [ -z "$win_id" ]; then
+    printf "⚠️  Could not determine window id – aborting.\n" >&2
+    exit 1
+fi
+
+# Per-window state file
+PROPORTION_FILE="$PROPORTION_DIR/$win_id"
+
+# 3b️⃣  Extract current client width
+current=$(printf '%s' "$client_json" | jq -r '.width // empty' || true)
+
+if [ -z "$current" ]; then
+    printf "⚠️ No focusing client reported – using monitor width as current size.\n"
+    current=$(mmsg get all-monitors | jq -r '
+        if type == "array" then
+            (map(select(.active == true))[0].width)
+        else
+            (.monitors | map(select(.active == true))[0].width)
+        end
+    ' || true)
+fi
+
+# 4️⃣  Get the *usable* work‑area width
+usable_width=$(mmsg get workarea 2>/dev/null || true)
+if [ -n "$usable_width" ]; then
+    usable_width=$(printf '%s' "$usable_width" | jq -r '.width // empty')
+fi
+if [ -z "$usable_width" ]; then
+    usable_width=$(mmsg get all-monitors | jq -r '
+        if type == "array" then
+            (map(select(.active == true))[0].width)
+        else
+            (.monitors | map(select(.active == true))[0].width)
+        end
+    ')
+fi
+
+# 5️⃣  Compute the proportion
+approx=$(awk -v cw="$current" -v uw="$usable_width" '
+    BEGIN {
+        if (uw <= 0) { print "0.50"; exit }
+        printf "%.4f\n", cw / uw
+    }')
+
+# 6️⃣  Find the nearest preset index
+nearest_index=$(awk -v target="$approx" '
+    BEGIN {
+        split("'"$PRESETS"'", a, " ");
+        best_i = 1;
+        best_d = 999;
+        for (i = 1; i <= length(a); i++) {
+            d = a[i] - target;
+            if (d < 0) d = -d;
+            if (d < best_d) {
+                best_d = d;
+                best_i = i;
+            }
+        }
+        print best_i;
+    }')
+
+# 7️⃣  Apply the direction argument
+case "${1:-}" in
+    up)   new_index=$((nearest_index + 1)) ;;
+    down) new_index=$((nearest_index - 1)) ;;
+    fullscreen)
+    # Check if currently fullscreen (approx >= 0.95 → treat as fullscreen)
+    is_fullscreen=$(awk -v a="$approx" 'BEGIN { print (a >= 0.95) ? "1" : "0" }')
+    if [ "$is_fullscreen" = "1" ]; then
+        # Currently fullscreen → restore this window's saved proportion
+        if [ -f "$PROPORTION_FILE" ]; then
+            saved=$(cat "$PROPORTION_FILE")
+            mmsg dispatch "set_proportion,$saved"
+            printf "✅ [win %s] Restored proportion to %s (fullscreen toggle off)\n" "$win_id" "$saved"
+            rm -f "$PROPORTION_FILE"
+        else
+            printf "⚠️  [win %s] No saved proportion – defaulting to 0.50\n" "$win_id" >&2
+            mmsg dispatch "set_proportion,0.50"
+        fi
+    else
+        # Not fullscreen → save this window's proportion & go fullscreen
+        saved=$(printf '%s\n' $PRESETS | sed -n "${nearest_index}p")
+        mkdir -p "$PROPORTION_DIR"
+        printf '%s' "$saved" > "$PROPORTION_FILE"
+        mmsg dispatch "set_proportion,1.00"
+        printf "✅ [win %s] Saved proportion %s, set to 1.00 (fullscreen toggle on)\n" "$win_id" "$saved"
+    fi
+    exit 0
+    ;;
+    *)    printf "❌ Usage: %s [up|down|fullscreen]\n" "$0" >&2; exit 1 ;;
+esac
+
+# 8️⃣  Clamp
+count=$(printf '%s\n' $PRESETS | wc -l)
+if [ "$new_index" -lt 1 ];   then new_index=1;   fi
+if [ "$new_index" -gt "$count" ]; then new_index=$count; fi
+
+# 9️⃣  Resolve the new preset value
+new_value=$(printf '%s\n' $PRESETS | sed -n "${new_index}p")
+
+# 🔟  Dispatch
+mmsg dispatch "set_proportion,$new_value"
+printf "✅ Set proportion to %s (preset %s of %s)\n" "$new_value" "$new_index" "$count"