2 files changed, 86 insertions, 0 deletions
diff --git a/src/keymap/KeySeqParser.hpp b/src/keymap/KeySeqParser.hpp
new file mode 100644
index 0000000..fac2546
--- /dev/null
+++ b/src/keymap/KeySeqParser.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <QtCore/qnamespace.h>
+#include <QtCore>
+#include <cmath>
+
+struct KeyChord {
+  Qt::KeyboardModifiers mod;
+  Qt::Key key;
+};
+bool operator==(const KeyChord a, const KeyChord b);
+
+typedef QList<KeyChord> KeySequence;
+
+enum KeyMatchType {
+  NoMatch,
+  Match,
+  Pending,
+};
+
+class KeySeqParser {
+public:
+  static const KeyMatchType keySequenceMatch(const KeySequence target,
+                                             const KeySequence current) {
+    for (int i = 0; i < target.length(); i++) {
+      if (current.length() <= i)
+        return KeyMatchType::Pending;
+
+      if (target[i].key != current[i].key ||
+          !target[i].mod.testFlags(current[i].mod))
+        return KeyMatchType::NoMatch;
+    }
+
+    return KeyMatchType::Match;
+  }
+
+public:
+  KeySeqParser();
+
+  KeySequence parse(QString keySequence);
+
+private:
+  Qt::Key parseKey(QString keyName);
+};
diff --git a/src/keymap/KeymapEvaluator.hpp b/src/keymap/KeymapEvaluator.hpp
new file mode 100644
index 0000000..db93900
--- /dev/null
+++ b/src/keymap/KeymapEvaluator.hpp
@@ -0,0 +1,42 @@
+#pragma once
+
+#include <QWidget>
+#include <QtCore/qmap.h>
+#include <QtCore/qnamespace.h>
+#include <QtCore>
+#include <functional>
+
+#include "keymap/KeySeqParser.hpp"
+#include "utils.hpp"
+
+typedef std::function<void()> KeyAction;
+
+struct KeyMap {
+  KeySequence keySequence;
+  KeyAction action;
+};
+
+enum KeyMode { Normal, Insert };
+
+class KeymapEvaluator : public QObject {
+  Q_OBJECT
+
+public:
+  KeymapEvaluator();
+
+  void addKeymap(KeyMode mode, QString key, KeyAction action);
+  bool evaluate(Qt::KeyboardModifiers modifiers, Qt::Key key);
+
+  DEFINE_SETTER(setCurrentMode, currentMode)
+  DEFINE_GETTER(getCurrentMode, currentMode)
+
+private:
+  const QList<KeyMap> *currentModeKeys();
+  bool isInsertableMode();
+
+private:
+  QMap<KeyMode, QList<KeyMap>> modalKeys;
+  KeySeqParser keySeqParser;
+  KeyMode currentMode = KeyMode::Normal;
+  KeySequence activeKeySequence;
+};