SoftKey in SystemDialog

system_dialog.js

// H5SystemDialog

// For value selector to override.
H5SystemDialog.prototype.overrideSoftKeys = function(key) {
  SoftKeysHelper.registerKeys(key, this.element);
}
// For value selector to restore
H5SystemDialog.prototype.registerSoftKeys = function(keys) {
  SoftKeysHelper.registerKeys(this.registeredKeys, this.element);
};

H5SystemDialog.prototype.registerEvents = function() {
  window.addEventListener('message', this._handle_message.bind(this));
};

// For inner iframe to update.
H5SystemDialog.prototype._handle_message = function(message) {
  switch (message.data.type) {
    case 'softkey':
      this.registerSoftKeys(message.data.keys);
      break;
  }
};

H5SystemDialog.prototype.registerSoftKeys = function(keys) {
  this.registeredKeys = keys;
  SoftKeysHelper.registerKeys(keys, this.element);
};

// In H5Account, inside the iframe
H5AccountUpdateSoftKeys = function(keys) {
  window.parent.postMessage({
    type: 'softkey',
    keys: keys
  })
};