Chromium HTML5 新的 Input 类型time对应c++

一、Input 类型: time

time 类型允许你选择一个时间。

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

<form action="demo-form.php">
  选择时间: <input type="time" name="usr_time">
  <input type="submit">
</form>

</body>
</html>

二、time c++定义

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

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

namespace blink {

class TimeInputType final : public BaseTemporalInputType {
 public:
  explicit TimeInputType(HTMLInputElement&);

 private:
  void CountUsage() override;
  Decimal DefaultValueForStepUp() const override;
  StepRange CreateStepRange(AnyStepHandling) const override;
  bool ParseToDateComponentsInternal(const String&,
                                     DateComponents*) const override;
  bool SetMillisecondToDateComponents(double, DateComponents*) const override;
  void WarnIfValueIsInvalid(const String&) const override;
  String LocalizeValue(const String&) const override;

  // BaseTemporalInputType functions
  String FormatDateTimeFieldsState(const DateTimeFieldsState&) const override;
  void SetupLayoutParameters(DateTimeEditElement::LayoutParameters&,
                             const DateComponents&) const override;
  bool IsValidFormat(bool has_year,
                     bool has_month,
                     bool has_week,
                     bool has_day,
                     bool has_ampm,
                     bool has_hour,
                     bool has_minute,
                     bool has_second) const override;
  String AriaLabelForPickerIndicator() const override;
  String ReversedRangeOutOfRangeText(const Decimal& minimum,
                                     const Decimal& maximum) const override;
};

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

}  // namespace blink