stream-chat-flutter/packages/stream_chat_flutter/lib/src/theme/message_theme.dart

import 'dart:ui';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:stream_chat_flutter/src/theme/avatar_theme.dart';

/// {@template message_theme_data}
/// Class for getting message theme
/// {@endtemplate}
// ignore: prefer-match-file-name
class StreamMessageThemeData with Diagnosticable {
  /// Creates a [StreamMessageThemeData].
  const StreamMessageThemeData({
    this.repliesStyle,
    this.messageTextStyle,
    this.messageAuthorStyle,
    this.messageLinksStyle,
    this.messageBackgroundColor,
    this.messageBorderColor,
    this.reactionsBackgroundColor,
    this.reactionsBorderColor,
    this.reactionsMaskColor,
    this.avatarTheme,
    this.createdAtStyle,
    @Deprecated('Use urlAttachmentBackgroundColor instead')
    Color? linkBackgroundColor,
    Color? urlAttachmentBackgroundColor,
    this.urlAttachmentHostStyle,
    this.urlAttachmentTitleStyle,
    this.urlAttachmentTextStyle,
    this.urlAttachmentTitleMaxLine,
    this.urlAttachmentTextMaxLine,
  }) : urlAttachmentBackgroundColor =
            urlAttachmentBackgroundColor ?? linkBackgroundColor;

  /// Text style for message text
  final TextStyle? messageTextStyle;

  /// Text style for message author
  final TextStyle? messageAuthorStyle;

  /// Text style for message links
  final TextStyle? messageLinksStyle;

  /// Text style for created at text
  final TextStyle? createdAtStyle;

  /// Text style for replies
  final TextStyle? repliesStyle;

  /// Color for messageBackgroundColor
  final Color? messageBackgroundColor;

  /// Color for message border color
  final Color? messageBorderColor;

  /// Color for reactions
  final Color? reactionsBackgroundColor;

  /// Colors reaction border
  final Color? reactionsBorderColor;

  /// Color for reaction mask
  final Color? reactionsMaskColor;

  /// Theme of the avatar
  final StreamAvatarThemeData? avatarTheme;

  /// Background color for messages with url attachments.
  @Deprecated('Use urlAttachmentBackgroundColor instead')
  Color? get linkBackgroundColor => urlAttachmentBackgroundColor;

  /// Background color for messages with url attachments.
  final Color? urlAttachmentBackgroundColor;

  /// Color for url attachment host.
  final TextStyle? urlAttachmentHostStyle;

  /// Color for url attachment title.
  final TextStyle? urlAttachmentTitleStyle;

  /// Color for url attachment text.
  final TextStyle? urlAttachmentTextStyle;

  /// Max number of lines in Url link title.
  final int? urlAttachmentTitleMaxLine;

  /// Max number of lines in Url link text.
  final int? urlAttachmentTextMaxLine;

  /// Copy with a theme
  StreamMessageThemeData copyWith({
    TextStyle? messageTextStyle,
    TextStyle? messageAuthorStyle,
    TextStyle? messageLinksStyle,
    TextStyle? createdAtStyle,
    TextStyle? repliesStyle,
    Color? messageBackgroundColor,
    Color? messageBorderColor,
    StreamAvatarThemeData? avatarTheme,
    Color? reactionsBackgroundColor,
    Color? reactionsBorderColor,
    Color? reactionsMaskColor,
    @Deprecated('Use urlAttachmentBackgroundColor instead')
    Color? linkBackgroundColor,
    Color? urlAttachmentBackgroundColor,
    TextStyle? urlAttachmentHostStyle,
    TextStyle? urlAttachmentTitleStyle,
    TextStyle? urlAttachmentTextStyle,
    int? urlAttachmentTitleMaxLine,
    int? urlAttachmentTextMaxLine,
  }) {
    return StreamMessageThemeData(
      messageTextStyle: messageTextStyle ?? this.messageTextStyle,
      messageAuthorStyle: messageAuthorStyle ?? this.messageAuthorStyle,
      messageLinksStyle: messageLinksStyle ?? this.messageLinksStyle,
      createdAtStyle: createdAtStyle ?? this.createdAtStyle,
      messageBackgroundColor:
          messageBackgroundColor ?? this.messageBackgroundColor,
      messageBorderColor: messageBorderColor ?? this.messageBorderColor,
      avatarTheme: avatarTheme ?? this.avatarTheme,
      repliesStyle: repliesStyle ?? this.repliesStyle,
      reactionsBackgroundColor:
          reactionsBackgroundColor ?? this.reactionsBackgroundColor,
      reactionsBorderColor: reactionsBorderColor ?? this.reactionsBorderColor,
      reactionsMaskColor: reactionsMaskColor ?? this.reactionsMaskColor,
      urlAttachmentBackgroundColor: urlAttachmentBackgroundColor ??
          linkBackgroundColor ??
          this.urlAttachmentBackgroundColor,
      urlAttachmentHostStyle:
          urlAttachmentHostStyle ?? this.urlAttachmentHostStyle,
      urlAttachmentTitleStyle:
          urlAttachmentTitleStyle ?? this.urlAttachmentTitleStyle,
      urlAttachmentTextStyle:
          urlAttachmentTextStyle ?? this.urlAttachmentTextStyle,
      urlAttachmentTitleMaxLine:
          urlAttachmentTitleMaxLine ?? this.urlAttachmentTitleMaxLine,
      urlAttachmentTextMaxLine:
          urlAttachmentTextMaxLine ?? this.urlAttachmentTextMaxLine,
    );
  }

  /// Linearly interpolate from one [StreamMessageThemeData] to another.
  StreamMessageThemeData lerp(
    StreamMessageThemeData a,
    StreamMessageThemeData b,
    double t,
  ) {
    return StreamMessageThemeData(
      avatarTheme:
          const StreamAvatarThemeData().lerp(a.avatarTheme!, b.avatarTheme!, t),
      createdAtStyle: TextStyle.lerp(a.createdAtStyle, b.createdAtStyle, t),
      messageAuthorStyle:
          TextStyle.lerp(a.messageAuthorStyle, b.messageAuthorStyle, t),
      messageBackgroundColor:
          Color.lerp(a.messageBackgroundColor, b.messageBackgroundColor, t),
      messageBorderColor:
          Color.lerp(a.messageBorderColor, b.messageBorderColor, t),
      messageLinksStyle:
          TextStyle.lerp(a.messageLinksStyle, b.messageLinksStyle, t),
      messageTextStyle:
          TextStyle.lerp(a.messageTextStyle, b.messageTextStyle, t),
      reactionsBackgroundColor: Color.lerp(
        a.reactionsBackgroundColor,
        b.reactionsBackgroundColor,
        t,
      ),
      reactionsBorderColor:
          Color.lerp(a.messageBorderColor, b.reactionsBorderColor, t),
      reactionsMaskColor:
          Color.lerp(a.reactionsMaskColor, b.reactionsMaskColor, t),
      repliesStyle: TextStyle.lerp(a.repliesStyle, b.repliesStyle, t),
      urlAttachmentBackgroundColor: Color.lerp(
        a.urlAttachmentBackgroundColor,
        b.urlAttachmentBackgroundColor,
        t,
      ),
      urlAttachmentHostStyle:
          TextStyle.lerp(a.urlAttachmentHostStyle, b.urlAttachmentHostStyle, t),
      urlAttachmentTextStyle: TextStyle.lerp(
        a.urlAttachmentTextStyle,
        b.urlAttachmentTextStyle,
        t,
      ),
      urlAttachmentTitleStyle: TextStyle.lerp(
        a.urlAttachmentTitleStyle,
        b.urlAttachmentTitleStyle,
        t,
      ),
      urlAttachmentTitleMaxLine: lerpDouble(
        a.urlAttachmentTitleMaxLine,
        b.urlAttachmentTitleMaxLine,
        t,
      )?.round(),
      urlAttachmentTextMaxLine: lerpDouble(
        a.urlAttachmentTextMaxLine,
        b.urlAttachmentTextMaxLine,
        t,
      )?.round(),
    );
  }

  /// Merge with a theme
  StreamMessageThemeData merge(StreamMessageThemeData? other) {
    if (other == null) return this;
    return copyWith(
      messageTextStyle: messageTextStyle?.merge(other.messageTextStyle) ??
          other.messageTextStyle,
      messageAuthorStyle: messageAuthorStyle?.merge(other.messageAuthorStyle) ??
          other.messageAuthorStyle,
      messageLinksStyle: messageLinksStyle?.merge(other.messageLinksStyle) ??
          other.messageLinksStyle,
      createdAtStyle:
          createdAtStyle?.merge(other.createdAtStyle) ?? other.createdAtStyle,
      repliesStyle:
          repliesStyle?.merge(other.repliesStyle) ?? other.repliesStyle,
      messageBackgroundColor: other.messageBackgroundColor,
      messageBorderColor: other.messageBorderColor,
      avatarTheme: avatarTheme?.merge(other.avatarTheme) ?? other.avatarTheme,
      reactionsBackgroundColor: other.reactionsBackgroundColor,
      reactionsBorderColor: other.reactionsBorderColor,
      reactionsMaskColor: other.reactionsMaskColor,
      urlAttachmentBackgroundColor: other.urlAttachmentBackgroundColor,
      urlAttachmentHostStyle: other.urlAttachmentHostStyle,
      urlAttachmentTitleStyle: other.urlAttachmentTitleStyle,
      urlAttachmentTextStyle: other.urlAttachmentTextStyle,
      urlAttachmentTitleMaxLine: other.urlAttachmentTitleMaxLine,
      urlAttachmentTextMaxLine: other.urlAttachmentTextMaxLine,
    );
  }

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is StreamMessageThemeData &&
          runtimeType == other.runtimeType &&
          messageTextStyle == other.messageTextStyle &&
          messageAuthorStyle == other.messageAuthorStyle &&
          messageLinksStyle == other.messageLinksStyle &&
          createdAtStyle == other.createdAtStyle &&
          repliesStyle == other.repliesStyle &&
          messageBackgroundColor == other.messageBackgroundColor &&
          messageBorderColor == other.messageBorderColor &&
          reactionsBackgroundColor == other.reactionsBackgroundColor &&
          reactionsBorderColor == other.reactionsBorderColor &&
          reactionsMaskColor == other.reactionsMaskColor &&
          avatarTheme == other.avatarTheme &&
          urlAttachmentBackgroundColor == other.urlAttachmentBackgroundColor &&
          urlAttachmentHostStyle == other.urlAttachmentHostStyle &&
          urlAttachmentTitleStyle == other.urlAttachmentTitleStyle &&
          urlAttachmentTextStyle == other.urlAttachmentTextStyle &&
          urlAttachmentTitleMaxLine == other.urlAttachmentTitleMaxLine &&
          urlAttachmentTextMaxLine == other.urlAttachmentTextMaxLine;

  @override
  int get hashCode =>
      messageTextStyle.hashCode ^
      messageAuthorStyle.hashCode ^
      messageLinksStyle.hashCode ^
      createdAtStyle.hashCode ^
      repliesStyle.hashCode ^
      messageBackgroundColor.hashCode ^
      messageBorderColor.hashCode ^
      reactionsBackgroundColor.hashCode ^
      reactionsBorderColor.hashCode ^
      reactionsMaskColor.hashCode ^
      avatarTheme.hashCode ^
      urlAttachmentBackgroundColor.hashCode ^
      urlAttachmentHostStyle.hashCode ^
      urlAttachmentTitleStyle.hashCode ^
      urlAttachmentTextStyle.hashCode ^
      urlAttachmentTitleMaxLine.hashCode ^
      urlAttachmentTextMaxLine.hashCode;

  @override
  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
    super.debugFillProperties(properties);
    properties
      ..add(DiagnosticsProperty('messageTextStyle', messageTextStyle))
      ..add(DiagnosticsProperty('messageAuthorStyle', messageAuthorStyle))
      ..add(DiagnosticsProperty('messageLinksStyle', messageLinksStyle))
      ..add(DiagnosticsProperty('createdAtStyle', createdAtStyle))
      ..add(DiagnosticsProperty('repliesStyle', repliesStyle))
      ..add(ColorProperty('messageBackgroundColor', messageBackgroundColor))
      ..add(ColorProperty('messageBorderColor', messageBorderColor))
      ..add(DiagnosticsProperty('avatarTheme', avatarTheme))
      ..add(ColorProperty('reactionsBackgroundColor', reactionsBackgroundColor))
      ..add(ColorProperty('reactionsBorderColor', reactionsBorderColor))
      ..add(ColorProperty('reactionsMaskColor', reactionsMaskColor))
      ..add(ColorProperty(
        'urlAttachmentBackgroundColor',
        urlAttachmentBackgroundColor,
      ))
      ..add(DiagnosticsProperty(
        'urlAttachmentHostStyle',
        urlAttachmentHostStyle,
      ))
      ..add(DiagnosticsProperty(
        'urlAttachmentTitleStyle',
        urlAttachmentTitleStyle,
      ))
      ..add(DiagnosticsProperty(
        'urlAttachmentTextStyle',
        urlAttachmentTextStyle,
      ))
      ..add(DiagnosticsProperty(
        'urlAttachmentTitleMaxLine',
        urlAttachmentTitleMaxLine,
      ))
      ..add(DiagnosticsProperty(
        'urlAttachmentTextMaxLine',
        urlAttachmentTextMaxLine,
      ));
  }
}