Add a keybindings manager widget

shell/plugins/panels/keybinds/KeybindsModel.js

@@ -0,0 +1,74 @@
+.pragma library
+
+var modifierNames = { SUPER: true, SHIFT: true, CTRL: true, CONTROL: true, ALT: true }
+
+function canonicalKeys(keys) {
+  var modifiers = []
+  var key = ""
+  var parts = String(keys || "").split("+")
+  for (var i = 0; i < parts.length; i++) {
+    var token = parts[i].trim().toUpperCase()
+    if (token === "CONTROL") token = "CTRL"
+    if (modifierNames[token]) modifiers.push(token)
+    else if (token.length > 0) key = token
+  }
+  modifiers.sort()
+  modifiers.push(key)
+  return modifiers.join("+")
+}
+
+function parseBindings(raw) {
+  var personal = []
+  var defaults = []
+  var lines = String(raw || "").split("\n")
+  for (var i = 0; i < lines.length; i++) {
+    var fields = lines[i].split("\t")
+    if (fields.length < 6) continue
+    var binding = {
+      origin: fields[0],
+      state: fields[1],
+      keys: fields[2],
+      description: fields[3],
+      kind: fields[4],
+      action: fields[5],
+      canonical: canonicalKeys(fields[2])
+    }
+    if (binding.origin === "personal") personal.push(binding)
+    else defaults.push(binding)
+  }
+  return personal.concat(defaults)
+}
+
+function matchesFilter(binding, filterMode) {
+  if (filterMode === "personal") return binding.origin === "personal"
+  if (filterMode === "changed") return binding.state !== "active"
+  return true
+}
+
+function matchesSearch(binding, query) {
+  if (!query) return true
+  return binding.keys.toLowerCase().indexOf(query) !== -1
+    || binding.description.toLowerCase().indexOf(query) !== -1
+    || binding.action.toLowerCase().indexOf(query) !== -1
+}
+
+function filterBindings(bindings, searchText, filterMode) {
+  var query = String(searchText || "").trim().toLowerCase()
+  var result = []
+  for (var i = 0; i < bindings.length; i++) {
+    if (matchesFilter(bindings[i], filterMode) && matchesSearch(bindings[i], query)) result.push(bindings[i])
+  }
+  return result
+}
+
+function conflictFor(bindings, keys, editingBinding) {
+  var canonical = canonicalKeys(keys)
+  if (canonical.charAt(canonical.length - 1) === "+" || canonical === "") return null
+  for (var i = 0; i < bindings.length; i++) {
+    var binding = bindings[i]
+    if (binding.state !== "active" || binding.canonical !== canonical) continue
+    if (editingBinding && editingBinding.origin === "personal" && editingBinding.canonical === canonical) continue
+    return binding
+  }
+  return null
+}