vim-mode: add vim_exemption_keys config for Ctrl+C/V

Add vim_exemption_keys config to control the behaviors of Ctrl+C and
Ctrl+V in Vim mode.

src/resources/vnote.ini

@@ -162,9 +162,14 @@ backup_directory=.
 ; String which is appended to a file name to make the name of the backup file
 backup_extension=.vswp
 
-; Enable back file
+; Enable backup file
 enable_backup_file=true
 
+; Skipped keys in Vim mode
+; c: Ctrl+C
+; v: Ctrl+V
+vim_exemption_keys=cv
+
 [web]
 ; Location and configuration for Mathjax
 mathjax_javascript=https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-MML-AM_CHTML

src/utils/vvim.cpp

@@ -1367,6 +1367,12 @@ bool VVim::handleKeyPressEvent(int key, int modifiers, int *p_autoIndentPos)
                 expandSelectionToWholeLines(cursor);
                 m_editor->setTextCursorW(cursor);
             }
+        } else if (VUtils::isControlModifierForVim(modifiers)) {
+            if (g_config->getVimExemptionKeys().contains('v')) {
+                // Let it be handled outside.
+                resetState();
+                goto exit;
+            }
         }
 
         break;
@@ -1642,6 +1648,12 @@ bool VVim::handleKeyPressEvent(int key, int modifiers, int *p_autoIndentPos)
             }
 
             break;
+        } else if (VUtils::isControlModifierForVim(modifiers)) {
+            if (g_config->getVimExemptionKeys().contains('c')) {
+                // Let it be handled outside.
+                resetState();
+                goto exit;
+            }
         }
 
         break;

src/vconfigmanager.cpp

@@ -280,6 +280,9 @@ void VConfigManager::initialize()
 
     m_enableBackupFile = getConfigFromSettings("global",
                                                "enable_backup_file").toBool();
+
+    m_vimExemptionKeys = getConfigFromSettings("global",
+                                               "vim_exemption_keys").toString();
 }
 
 void VConfigManager::initSettings()

src/vconfigmanager.h

@@ -387,6 +387,8 @@ public:
     // Get defined external editors.
     QVector<QPair<QString, QString>> getExternalEditors() const;
 
+    const QString &getVimExemptionKeys() const;
+
 private:
     // Look up a config from user and default settings.
     QVariant getConfigFromSettings(const QString &section, const QString &key) const;
@@ -730,6 +732,11 @@ private:
     // Whether enable backup file.
     bool m_enableBackupFile;
 
+    // Skipped keys in Vim mode.
+    // c: Ctrl+C
+    // v: Ctrl+V
+    QString m_vimExemptionKeys;
+
     // The name of the config file in each directory, obsolete.
     // Use c_dirConfigFile instead.
     static const QString c_obsoleteDirConfigFile;
@@ -1826,4 +1833,9 @@ inline bool VConfigManager::getEnableBackupFile() const
     return m_enableBackupFile;
 }
 
+inline const QString &VConfigManager::getVimExemptionKeys() const
+{
+    return m_vimExemptionKeys;
+}
+
 #endif // VCONFIGMANAGER_H