From 36e5a07b92962b8095fd5d1c144dbec9ebd41f98 Mon Sep 17 00:00:00 2001
From: sudacode <suda@sudacode.com>
Date: Sat, 21 Mar 2026 21:07:18 -0700
Subject: [PATCH] fix: add modernz patch helper

---
 scripts/patch-modernz.sh | 144 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100755 scripts/patch-modernz.sh

diff --git a/scripts/patch-modernz.sh b/scripts/patch-modernz.sh
new file mode 100755
index 0000000..761368f
--- /dev/null
+++ b/scripts/patch-modernz.sh
@@ -0,0 +1,144 @@
+#!/bin/bash
+
+set -euo pipefail
+
+TARGET="${HOME}/.config/mpv/scripts/modernz.lua"
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --target)
+            TARGET="$2"
+            shift 2
+            ;;
+        --help|-h)
+            cat <<'EOF'
+Usage: patch-modernz.sh [--target /path/to/modernz.lua]
+
+Applies the local ModernZ OSC sidebar-resize patch to an existing modernz.lua.
+If the target file does not exist, the script exits without changing anything.
+EOF
+            exit 0
+            ;;
+        *)
+            echo "Unknown argument: $1" >&2
+            exit 1
+            ;;
+    esac
+done
+
+if [[ ! -f "$TARGET" ]]; then
+    echo "patch-modernz: target missing, skipped: $TARGET"
+    exit 0
+fi
+
+if grep -q 'get_external_video_margin_ratio' "$TARGET" \
+    && grep -q 'observe_cached("video-margin-ratio-right"' "$TARGET"; then
+    echo "patch-modernz: already patched: $TARGET"
+    exit 0
+fi
+
+patch --forward --quiet "$TARGET" <<'PATCH'
+--- a/modernz.lua
++++ b/modernz.lua
+@@ -931,6 +931,26 @@ local function reset_margins()
+     set_margin_offset("osd-margin-y", 0)
+ end
+ 
++local function get_external_video_margin_ratio(prop)
++    local value = mp.get_property_number(prop, 0) or 0
++    if value < 0 then return 0 end
++    if value > 0.95 then return 0.95 end
++    return value
++end
++
++local function get_layout_horizontal_bounds()
++    local margin_l = get_external_video_margin_ratio("video-margin-ratio-left")
++    local margin_r = get_external_video_margin_ratio("video-margin-ratio-right")
++    local width_ratio = math.max(0.05, 1 - margin_l - margin_r)
++    local pos_x = osc_param.playresx * margin_l
++    local width = osc_param.playresx * width_ratio
++
++    osc_param.video_margins.l = margin_l
++    osc_param.video_margins.r = margin_r
++
++    return pos_x, width
++end
++
+ local function update_margins()
+     local use_margins = get_hidetimeout() < 0 or user_opts.dynamic_margins
+     local top_vis    = state.wc_visible
+@@ -1965,8 +1985,9 @@ layouts["modern"] = function ()
+     local chapter_index = user_opts.show_chapter_title and mp.get_property_number("chapter", -1) >= 0
+     local osc_height_offset = (no_title and user_opts.notitle_osc_h_offset or 0) + ((no_chapter or not chapter_index) and user_opts.nochapter_osc_h_offset or 0)
+ 
++    local posX, layout_width = get_layout_horizontal_bounds()
+     local osc_geo = {
+-        w = osc_param.playresx,
++        w = layout_width,
+         h = user_opts.osc_height - osc_height_offset
+     }
+ 
+@@ -1974,7 +1995,6 @@ layouts["modern"] = function ()
+     osc_param.video_margins.b = math.max(user_opts.osc_height, user_opts.fade_alpha) / osc_param.playresy
+ 
+     -- origin of the controllers, left/bottom corner
+-    local posX = 0
+     local posY = osc_param.playresy
+ 
+     osc_param.areas = {} -- delete areas
+@@ -2191,8 +2211,9 @@ layouts["modern-compact"] = function ()
+         ((user_opts.title_mbtn_left_command == "" and user_opts.title_mbtn_right_command == "") and 25 or 0) +
+         (((user_opts.chapter_title_mbtn_left_command == "" and user_opts.chapter_title_mbtn_right_command == "") or not chapter_index) and 10 or 0)
+ 
++    local posX, layout_width = get_layout_horizontal_bounds()
+     local osc_geo = {
+-        w = osc_param.playresx,
++        w = layout_width,
+         h = 145 - osc_height_offset
+     }
+ 
+@@ -2200,7 +2221,6 @@ layouts["modern-compact"] = function ()
+     osc_param.video_margins.b = math.max(osc_geo.h, user_opts.fade_alpha) / osc_param.playresy
+ 
+     -- origin of the controllers, left/bottom corner
+-    local posX = 0
+     local posY = osc_param.playresy
+ 
+     osc_param.areas = {} -- delete areas
+@@ -2370,8 +2390,9 @@ layouts["modern-compact"] = function ()
+ end
+ 
+ layouts["modern-image"] = function ()
++    local posX, layout_width = get_layout_horizontal_bounds()
+     local osc_geo = {
+-        w = osc_param.playresx,
++        w = layout_width,
+         h = 50
+     }
+ 
+@@ -2379,7 +2400,6 @@ layouts["modern-image"] = function ()
+     osc_param.video_margins.b = math.max(50, user_opts.fade_alpha) / osc_param.playresy
+ 
+     -- origin of the controllers, left/bottom corner
+-    local posX = 0
+     local posY = osc_param.playresy
+ 
+     osc_param.areas = {} -- delete areas
+@@ -3718,6 +3738,14 @@ observe_cached("border", request_init_resize)
+ observe_cached("title-bar", request_init_resize)
+ observe_cached("window-maximized", request_init_resize)
+ observe_cached("idle-active", request_tick)
++observe_cached("video-margin-ratio-left", function ()
++    state.marginsREQ = true
++    request_init_resize()
++end)
++observe_cached("video-margin-ratio-right", function ()
++    state.marginsREQ = true
++    request_init_resize()
++end)
+ mp.observe_property("user-data/mpv/console/open", "bool", function(_, val)
+     if val and user_opts.visibility == "auto" and not user_opts.showonselect then
+         osc_visible(false)
+PATCH
+
+echo "patch-modernz: patched $TARGET"