Fix memory leaks

Reduce definitely lost

Switch us,jp,zh_CN,zh_TW,kr,ru and us.

Before:

  ==11333== LEAK SUMMARY:
  ==11333==    definitely lost: 47,787 bytes in 120 blocks
  ==11333==    indirectly lost: 11,202,985 bytes in 105,883 blocks
  ==11333==      possibly lost: 46,244 bytes in 682 blocks
  ==11333==    still reachable: 20,012,541 bytes in 82,152 blocks
  ==11333==                       of which reachable via heuristic:
  ==11333==                         length64           : 152,752 bytes in 377 blocks
  ==11333==                         newarray           : 1,568 bytes in 18 blocks
  ==11333==                         multipleinheritance: 3,816 bytes in 46 blocks
  ==11333==         suppressed: 0 bytes in 0 blocks

After:

  ==16589== LEAK SUMMARY:
  ==16589==    definitely lost: 46,208 bytes in 110 blocks
  ==16589==    indirectly lost: 9,753,601 bytes in 93,247 blocks
  ==16589==      possibly lost: 65,671 bytes in 832 blocks
  ==16589==    still reachable: 20,011,619 bytes in 82,144 blocks
  ==16589==                       of which reachable via heuristic:
  ==16589==                         length64           : 152,752 bytes in 377 blocks
  ==16589==                         newarray           : 1,568 bytes in 18 blocks
  ==16589==                         multipleinheritance: 14,136 bytes in 158 blocks
  ==16589==         suppressed: 0 bytes in 0 blocks

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

src/virtualkeyboardanthy.cpp

@@ -24,6 +24,10 @@ AnthyKeyboard::AnthyKeyboard()
         << "path of Japanese keyboard layout file: " << jsonPath;
     loader_ = new KeyboardLayout(jsonPath);
 }
+AnthyKeyboard::~AnthyKeyboard() {
+    FCITX_KEYBOARD_LAYOUT() << "~AnthyKeyboard()";
+    delete loader_;
+}
 #else
 AnthyKeyboard::AnthyKeyboard()
     : typingMethodNameOfKana_(

src/virtualkeyboardanthy.h

@@ -54,6 +54,7 @@ static const std::string anthyGetTextDomainName = "fcitx5-anthy";
 class AnthyKeyboard : public I18nKeyboard {
 public:
     AnthyKeyboard();
+    ~AnthyKeyboard() override;
     KeyboardType type() const override { return KeyboardType::Anthy; };
     const char *label() const override { return "JP"; }
     const std::string languageCode() const override { return "ja"; }

src/virtualkeyboardchewing.h

@@ -41,6 +41,10 @@ class ChewingKeyboard : public I18nKeyboard {
                          << jsonPath;
         loader_ = new KeyboardLayout(jsonPath);
     }
+    ~ChewingKeyboard() override {
+        FCITX_KEYBOARD_LAYOUT() << "~ChewingKeyboard()";
+        delete loader_;
+    }
 #endif
 
 private:

src/virtualkeyboardcustom.h

@@ -45,6 +45,11 @@ class CustomKeyboard : public I18nKeyboard {
         label_ = loader_->label();
         languageCode_ = std::string(loader_->languageCode());
     }
+    ~CustomKeyboard() override {
+        FCITX_KEYBOARD_LAYOUT()
+            << "~CustomKeyboard() " << label_ << ":" << languageCode_;
+        delete loader_;
+    }
     int mode() { return mode_; }
     void switchMode();
     bool isAdditionalMarkOn() const { return isAdditionalMarkOn_; }

src/virtualkeyboardhangul.h

@@ -37,6 +37,10 @@ class HangulKeyboard : public I18nKeyboard {
         FCITX_KEYBOARD() << "path of Korean keyboard layout file: " << jsonPath;
         loader_ = new KeyboardLayout(jsonPath);
     }
+    ~HangulKeyboard() override {
+        FCITX_KEYBOARD_LAYOUT() << "~HangulKeyboard()";
+        delete loader_;
+    }
 #endif
 
 private:

src/virtualkeyboardi18n.h

@@ -45,6 +45,9 @@ class VirtualKey;
 class VirtualKeyboard;
 class I18nKeyboard {
 public:
+#if USE_CUSTOM_LAYOUT
+    virtual ~I18nKeyboard() {}
+#endif
     virtual KeyboardType type() const = 0;
     virtual const char *label() const = 0;
     virtual void updateKeys() = 0;

src/virtualkeyboardlayout.h

@@ -35,6 +35,17 @@ class KeyboardLayout {
         }
     }
 
+    ~KeyboardLayout() {
+        FCITX_KEYBOARD_LAYOUT() << "~KeyboardLayout()";
+        keys_.clear();
+        stateLabels_.clear();
+        modeLabels_.clear();
+        modeActions_.clear();
+        modeOffsets_.clear();
+        // decrement the reference count
+        json_object_put(json_);
+        free(json_);
+    }
     // Keyboard metadata
     const char *label() { return label_; }
     const char *languageCode() { return languageCode_; }

src/virtualkeyboardpinyin.h

@@ -40,6 +40,10 @@ class PinyinKeyboard : public I18nKeyboard {
         FCITX_KEYBOARD() << "path of Korean keyboard layout file: " << jsonPath;
         loader_ = new KeyboardLayout(jsonPath);
     }
+    ~PinyinKeyboard() override {
+        FCITX_KEYBOARD() << "~PinyinKeyboard()";
+        delete loader_;
+    }
 #endif
 
 private:

src/virtualkeyboardrussian.h

@@ -38,6 +38,10 @@ class RussianKeyboard : public I18nKeyboard {
                          << jsonPath;
         loader_ = new KeyboardLayout(jsonPath);
     }
+    ~RussianKeyboard() override {
+        FCITX_KEYBOARD() << "~RussianKeyboard()";
+        delete loader_;
+    }
 #endif
 
 private:

src/virtualkeyboardus.h

@@ -38,6 +38,10 @@ class UsKeyboard : public I18nKeyboard {
                          << jsonPath;
         loader_ = new KeyboardLayout(jsonPath);
     }
+    ~UsKeyboard() override {
+        FCITX_KEYBOARD() << "~UsKeyboard()";
+        delete loader_;
+    }
 #endif
 
 private: