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Chromium HTML5 新的 Input 类型search对应c++

article 2024/10/27 16:00:52

一、Input 类型: search

search 类型用于搜索域，比如站点搜索或 Google 搜索。

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>test</title> 
</head>
<body>

<form action="demo-form.php">
  Search Google: <input type="search" name="googlesearch"><br>
  <input type="submit">
</form>

</body>
</html>

二、c++定义

third_party\blink\renderer\core\html\forms\search_input_type.h

third_party\blink\renderer\core\html\forms\search_input_type.cc

namespace blink {

class SearchInputType final : public BaseTextInputType {
 public:
  explicit SearchInputType(HTMLInputElement&);

  void Trace(Visitor*) const final;

 private:
  void CountUsage() override;
  ControlPart AutoAppearance() const override;
  bool NeedsContainer() const override;
  void CreateShadowSubtree() override;
  void HandleKeydownEvent(KeyboardEvent&) override;
  void DidSetValueByUserEdit() override;
  bool SupportsInputModeAttribute() const override;
  void UpdateView() override;
  void DispatchSearchEvent() override;

  void SearchEventTimerFired(TimerBase*);
  bool SearchEventsShouldBeDispatched() const;
  void StartSearchEventTimer();
  void UpdateCancelButtonVisibility();

  HeapTaskRunnerTimer<SearchInputType> search_event_timer_;
};

template <>
struct DowncastTraits<SearchInputType> {
  static bool AllowFrom(const InputType& type) {
    return type.IsSearchInputType();
  }
};

}  // namespace blink

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