Merge pull request #95 from lite-xl/opacity

Opacity Modification Plugin

1 files changed, 62 insertions, 0 deletions

diff --git a/plugins/opacity.lua b/plugins/opacity.lua
new file mode 100644
index 0000000..8dd0d9a
--- /dev/null
+++ b/plugins/opacity.lua
@@ -0,0 +1,62 @@
+-- mod-version:2 -- lite-xl 2.0
+local common = require "core.common"
+local command = require "core.command"
+local keymap = require "core.keymap"
+local RootView = require "core.rootview"
+
+local opacity_on = true
+local use_mousewheel = true
+local opacity_steps = 0.05
+local default_opacity = 1
+local current_opacity = default_opacity
+
+local function set_opacity(opacity)
+  if not opacity_on then opacity_on = true end
+  current_opacity = common.clamp(opacity, 0.2, 1)
+  system.set_window_opacity(current_opacity)
+end
+
+local on_mouse_wheel = RootView.on_mouse_wheel
+
+function RootView:on_mouse_wheel(d, ...)
+  if keymap.modkeys["shift"] and use_mousewheel then
+    if d < 0 then command.perform "opacity:decrease" end
+    if d > 0 then command.perform "opacity:increase" end
+  else
+    return on_mouse_wheel(self, d, ...)
+  end
+end
+
+local function tog_opacity()
+  opacity_on = not opacity_on
+  if opacity_on then
+    system.set_window_opacity(current_opacity)
+  else
+    system.set_window_opacity(default_opacity)
+  end
+end
+
+local function res_opacity()
+  set_opacity(default_opacity)
+end
+
+local function inc_opacity()
+  set_opacity(current_opacity + opacity_steps)
+end
+
+local function dec_opacity()
+  set_opacity(current_opacity - opacity_steps)
+end
+
+command.add(nil, {
+  ["opacity:toggle"  ] = function() tog_opacity() end,
+  ["opacity:reset"   ] = function() res_opacity() end,
+  ["opacity:decrease"] = function() dec_opacity() end,
+  ["opacity:increase"] = function() inc_opacity() end,
+  ["opacity:toggle mouse wheel use"] = function() use_mousewheel = not use_mousewheel end,
+})
+
+keymap.add {
+  ["shift+f11"] = "opacity:toggle",
+  ["ctrl+f11"]  = "opacity:toggle mouse wheel use",
+}