handleKeyboard: function()

in lib/ace/keyboard/vim.js [6725:6799]
70 lines of code
39 McCabe index (conditional complexity)

    handleKeyboard: function(data, hashId, key, keyCode, e) {
      var editor = data.editor;
      var cm = editor.state.cm;
      var vim = getVim(cm);
      if (keyCode == -1) return;

      // in non-insert mode we try to find the ascii key corresponding to the text in textarea
      // this is needed because in languages that use latin alphabet we want to get the key that browser sends to the textarea
      // and in non
      if (!vim.insertMode) {
        if (hashId == -1) {
          if (key.charCodeAt(0) > 0xFF) {
            if (data.inputKey) {
              key = data.inputKey;
              if (key && data.inputHash == 4)
                key = key.toUpperCase();
            }
          }
          data.inputChar = key;
        }
        else if (hashId == 4 || hashId == 0) {
          if (data.inputKey == key && data.inputHash == hashId && data.inputChar) {
            // on mac text input doesn't repeat
            key = data.inputChar;
            hashId = -1
          }
          else {
            data.inputChar = null;
            data.inputKey = key;
            data.inputHash = hashId;
          }
        }
        else {
          data.inputChar = data.inputKey = null;
        }
      }
      
      if (cm.state.overwrite && vim.insertMode && key == "backspace" && hashId == 0) {
        return {command: "gotoleft"}
      }

      // ctrl-c is special it both exits mode and copies text
      if (key == "c" && hashId == 1) { // key == "ctrl-c"
        if (!useragent.isMac && editor.getCopyText()) {
          editor.once("copy", function() {
            if (vim.insertMode) editor.selection.clearSelection();
            else cm.operation(function() { exitVisualMode(cm); });
          });
          return {command: "null", passEvent: true};
        }
      }

      if (key == "esc" && !vim.insertMode && !vim.visualMode && !cm.ace.inMultiSelectMode) {
        var searchState = getSearchState(cm);
        var overlay = searchState.getOverlay();
        if (overlay) cm.removeOverlay(overlay);
      }

      if (hashId == -1 || hashId & 1 || hashId === 0 && key.length > 1) {
        var insertMode = vim.insertMode;
        var name = lookupKey(hashId, key, e || {});
        if (vim.status == null)
          vim.status = "";
        var isHandled = multiSelectHandleKey(cm, name, 'user');
        vim = getVim(cm); // may be changed by multiSelectHandleKey
        if (isHandled && vim.status != null)
          vim.status += name;
        else if (vim.status == null)
          vim.status = "";
        cm._signal("changeStatus");
        if (!isHandled && (hashId != -1 || insertMode))
          return;
        return {command: "null", passEvent: !isHandled};
      }
    },