Unify input methods with the installer keyboard selection

default/hypr/bindings/input-method.lua

@@ -0,0 +1,66 @@
+local paths = require("default.hypr.paths")
+
+-- Same terminal tag test as clipboard.lua.
+local function active_window_is_terminal()
+  local window = hl.get_active_window()
+  if not window then
+    return false
+  end
+
+  for _, tag in ipairs(window.tags or {}) do
+    if tag:gsub("%*$", "") == "terminal" then
+      return true
+    end
+  end
+
+  return false
+end
+
+-- Read on demand so adding an engine in a live desktop needs no reload.
+local function has_input_method()
+  local file = io.open(paths.config_home .. "/fcitx5/profile", "r")
+  if not file then return false end
+  local in_item, found = false, false
+  for line in file:lines() do
+    if line:match("^%[") then
+      in_item = line:match("^%[Groups/%d+/Items/%d+%]$") ~= nil
+    elseif in_item then
+      local name = line:match("^Name=(.+)$")
+      if name and not name:match("^keyboard%-") then found = true end
+    end
+  end
+  file:close()
+  return found
+end
+
+-- Preserve custom Ctrl + Space triggers. Without a
+-- [Hotkey/TriggerKeys] list in the config, fcitx5 uses its default, which has
+-- Ctrl + Space.
+local function fcitx5_toggles_on_ctrl_space()
+  local file = io.open(paths.config_home .. "/fcitx5/config", "r")
+  if not file then
+    return true
+  end
+
+  local in_triggers, has_triggers, toggles = false, false, false
+  for line in file:lines() do
+    if line:match("^%[") then
+      in_triggers = line == "[Hotkey/TriggerKeys]"
+      has_triggers = has_triggers or in_triggers
+    elseif in_triggers and line:match("^%d+=Control%+space$") then
+      toggles = true
+    end
+  end
+
+  file:close()
+  return toggles or not has_triggers
+end
+
+-- Pass the tmux/Herdr prefix through and return to direct input, so the next
+-- key reaches the multiplexer instead of the engine's composition.
+o.bind("CTRL + SPACE", "Direct input for the terminal prefix", function()
+  if active_window_is_terminal() and has_input_method() and not fcitx5_toggles_on_ctrl_space() then
+    -- Wait for the local controller reply before dispatching the next key.
+    o.shell_succeeds("timeout 0.3 fcitx5-remote --check -c")
+  end
+end, { non_consuming = true })

default/hypr/bindings/jis.lua

@@ -0,0 +1,43 @@
+-- Defaults for Japanese (JIS) keyboards, which only apply when the installed
+-- layout is jp. See default/hypr/keyboard.lua.
+
+local keyboard = require("default.hypr.keyboard")
+
+if not keyboard.jis() then
+  return
+end
+
+-- Same down/up split as the universal clipboard shortcuts in clipboard.lua.
+local function send_shortcut_once(mods, key)
+  hl.dispatch(hl.dsp.send_key_state({ mods = mods, key = key, state = "down" }))
+
+  hl.timer(function()
+    hl.dispatch(hl.dsp.send_key_state({ mods = mods, key = key, state = "up" }))
+  end, { timeout = 50, type = "oneshot" })
+end
+
+local function active_window_class()
+  local window = hl.get_active_window()
+  return ((window and window.class) or ""):lower()
+end
+
+-- On JIS, + is Shift + ;, so apps see Ctrl + Shift + semicolon and never zoom
+-- in. Hand them Ctrl + keypad plus instead, which Chromium, Electron apps,
+-- VS Code, and Firefox read as zoom in. Obsidian only listens for Ctrl + ^,
+-- which JIS types without Shift.
+local zoom_in_overrides = {
+  obsidian = { "CTRL", "asciicircum" },
+}
+
+o.bind("CTRL + SHIFT + semicolon", "Zoom in (JIS + key)", function()
+  local class = active_window_class()
+
+  for pattern, chord in pairs(zoom_in_overrides) do
+    if class:find(pattern, 1, true) then
+      send_shortcut_once(chord[1], chord[2])
+      return
+    end
+  end
+
+  send_shortcut_once("CTRL", "KP_Add")
+end)