文本扩展

text.dart

/*
 * @Author: zmtzawqlp 
 * @Date: 2020-01-07 15:26:54 
 * @Last Modified by: zmtzawqlp
 * @Last Modified time: 2020-04-07 15:38:18
 */

import 'package:flutter/widgets.dart';

/// Widget相关扩展
extension TextE on Text {
  /// 文本上对齐
  Text alignUp({
    @required double fontSize,
    @required double lineHeight,
    Color color,
  }) {
    return data == null
        ? Text.rich(
            textSpan,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: 1,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: 1,
                  color: color,
                ),
            strutStyle: StrutStyle(
              height: lineHeight / fontSize,
            ),
          )
        : Text(
            data,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: 1,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: 1,
                  color: color,
                ),
            strutStyle: StrutStyle(
              height: lineHeight / fontSize,
            ),
          );
  }

  /// 文本下对齐
  Text alignDown({
    @required double fontSize,
    @required double lineHeight,
    Color color,
  }) {
    final double height = 1.0 - (lineHeight - fontSize) / 2.0 / lineHeight;
    return data == null
        ? Text.rich(
            textSpan,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: height,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: height,
                  color: color,
                ),
          )
        : Text(
            data,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: height,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: height,
                  color: color,
                ),
          );
  }

  /// 设置行高
  Text withLineHeight({
    @required double fontSize,
    @required double lineHeight,
    Color color,
  }) {
    return data == null
        ? Text.rich(
            textSpan,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: lineHeight / fontSize,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: lineHeight / fontSize,
                  color: color,
                ),
          )
        : Text(
            data,
            textAlign: textAlign,
            textDirection: textDirection,
            textHeightBehavior: textHeightBehavior,
            textScaleFactor: textScaleFactor,
            textWidthBasis: textWidthBasis,
            locale: locale,
            softWrap: softWrap,
            overflow: overflow,
            maxLines: maxLines,
            semanticsLabel: semanticsLabel,
            style: style?.copyWith(
                  fontSize: fontSize,
                  height: lineHeight / fontSize,
                  inherit: style?.inherit,
                  color: color ?? style?.color,
                  backgroundColor: style?.backgroundColor,
                  fontFamily: style?.fontFamily,
                  fontFamilyFallback: style?.fontFamilyFallback,
                  fontWeight: style?.fontWeight,
                  fontStyle: style?.fontStyle,
                  letterSpacing: style?.letterSpacing,
                  wordSpacing: style?.wordSpacing,
                  textBaseline: style?.textBaseline,
                  locale: style?.locale,
                  foreground: style?.foreground,
                  background: style?.background,
                  shadows: style?.shadows,
                  fontFeatures: style?.fontFeatures,
                  decoration: style?.decoration,
                  decorationColor: style?.decorationColor,
                  decorationStyle: style?.decorationStyle,
                  decorationThickness: style?.decorationThickness,
                  debugLabel: style?.debugLabel,
                ) ??
                TextStyle(
                  fontSize: fontSize,
                  height: lineHeight / fontSize,
                  color: color,
                ),
          );
  }
}