fluffychat/lib/pangea/common/utils/overlay.dart

import 'dart:developer';
import 'dart:ui';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

import 'package:fluffychat/config/app_config.dart';
import 'package:fluffychat/pangea/common/utils/any_state_holder.dart';
import 'package:fluffychat/pangea/common/widgets/overlay_container.dart';
import '../../../config/themes.dart';
import '../../../widgets/matrix.dart';
import 'error_handler.dart';

enum OverlayPositionEnum {
  transform,
  centered,
  top,
}

class OverlayUtil {
  static showOverlay({
    required BuildContext context,
    required Widget child,
    required String transformTargetId,
    backDropToDismiss = true,
    blurBackground = false,
    Color? borderColor,
    Color? backgroundColor,
    bool closePrevOverlay = true,
    Function? onDismiss,
    OverlayPositionEnum position = OverlayPositionEnum.transform,
    Offset? offset,
    String? overlayKey,
    Alignment? targetAnchor,
    Alignment? followerAnchor,
    bool ignorePointer = false,
    bool canPop = true,
  }) {
    try {
      if (closePrevOverlay) {
        MatrixState.pAnyState.closeOverlay();
      }

      final OverlayEntry entry = OverlayEntry(
        builder: (context) => AnimatedContainer(
          duration: FluffyThemes.animationDuration,
          curve: FluffyThemes.animationCurve,
          child: IgnorePointer(
            ignoring: ignorePointer,
            child: Stack(
              children: [
                if (backDropToDismiss)
                  TransparentBackdrop(
                    backgroundColor: backgroundColor,
                    onDismiss: onDismiss,
                    blurBackground: blurBackground,
                  ),
                Positioned(
                  top: (position == OverlayPositionEnum.centered ||
                          position == OverlayPositionEnum.top)
                      ? 0
                      : null,
                  right: (position == OverlayPositionEnum.centered ||
                          position == OverlayPositionEnum.top)
                      ? 0
                      : null,
                  left: (position == OverlayPositionEnum.centered ||
                          position == OverlayPositionEnum.top)
                      ? 0
                      : null,
                  bottom: (position == OverlayPositionEnum.centered) ? 0 : null,
                  child: (position != OverlayPositionEnum.transform)
                      ? child
                      : CompositedTransformFollower(
                          targetAnchor: targetAnchor ?? Alignment.topCenter,
                          followerAnchor:
                              followerAnchor ?? Alignment.bottomCenter,
                          link: MatrixState.pAnyState
                              .layerLinkAndKey(transformTargetId)
                              .link,
                          showWhenUnlinked: false,
                          offset: offset ?? Offset.zero,
                          child: child,
                        ),
                ),
              ],
            ),
          ),
        ),
      );

      MatrixState.pAnyState.openOverlay(
        entry,
        context,
        overlayKey: overlayKey,
        canPop: canPop,
      );
    } catch (err, stack) {
      debugger(when: kDebugMode);
      ErrorHandler.logError(
        e: err,
        s: stack,
        data: {},
      );
    }
  }

  static showPositionedCard({
    required BuildContext context,
    required Widget cardToShow,
    required String transformTargetId,
    required double maxHeight,
    required double maxWidth,
    backDropToDismiss = true,
    Color? borderColor,
    bool closePrevOverlay = true,
    String? overlayKey,
    bool isScrollable = true,
    bool addBorder = true,
  }) {
    try {
      final LayerLinkAndKey layerLinkAndKey =
          MatrixState.pAnyState.layerLinkAndKey(transformTargetId);
      if (layerLinkAndKey.key.currentContext == null) {
        debugPrint("layerLinkAndKey.key.currentContext is null");
        return;
      }

      Offset offset = Offset.zero;
      final RenderBox? targetRenderBox =
          layerLinkAndKey.key.currentContext!.findRenderObject() as RenderBox?;

      bool hasTopOverflow = false;
      if (targetRenderBox != null && targetRenderBox.hasSize) {
        final Offset transformTargetOffset =
            (targetRenderBox).localToGlobal(Offset.zero);
        final Size transformTargetSize = targetRenderBox.size;

        final columnWidth = FluffyThemes.isColumnMode(context)
            ? FluffyThemes.columnWidth + FluffyThemes.navRailWidth
            : 0;

        final horizontalMidpoint = (transformTargetOffset.dx - columnWidth) +
            (transformTargetSize.width / 2);

        final verticalMidpoint =
            transformTargetOffset.dy + (transformTargetSize.height / 2);

        final halfMaxWidth = maxWidth / 2;
        final hasLeftOverflow = (horizontalMidpoint - halfMaxWidth) < 0;
        final hasRightOverflow = (horizontalMidpoint + halfMaxWidth) >
            (MediaQuery.of(context).size.width - columnWidth);
        hasTopOverflow = (verticalMidpoint - maxHeight) < 0;

        double xOffset = 0;

        MediaQuery.of(context).size.width - (horizontalMidpoint + halfMaxWidth);
        if (hasLeftOverflow) {
          xOffset = (horizontalMidpoint - halfMaxWidth - 10) * -1;
        } else if (hasRightOverflow) {
          xOffset = (MediaQuery.of(context).size.width - columnWidth) -
              (horizontalMidpoint + halfMaxWidth + 10);
        }
        offset = Offset(xOffset, 0);
      }

      final Widget child = addBorder
          ? Material(
              borderOnForeground: false,
              color: Colors.transparent,
              clipBehavior: Clip.antiAlias,
              child: OverlayContainer(
                cardToShow: cardToShow,
                borderColor: borderColor,
                maxHeight: maxHeight,
                maxWidth: maxWidth,
                isScrollable: isScrollable,
              ),
            )
          : cardToShow;

      showOverlay(
        context: context,
        child: child,
        transformTargetId: transformTargetId,
        backDropToDismiss: backDropToDismiss,
        borderColor: borderColor,
        closePrevOverlay: closePrevOverlay,
        offset: offset,
        overlayKey: overlayKey,
        targetAnchor:
            hasTopOverflow ? Alignment.bottomCenter : Alignment.topCenter,
        followerAnchor:
            hasTopOverflow ? Alignment.topCenter : Alignment.bottomCenter,
      );
    } catch (err, stack) {
      debugger(when: kDebugMode);
      ErrorHandler.logError(
        e: err,
        s: stack,
        data: {},
      );
    }
  }

  static bool get isOverlayOpen => MatrixState.pAnyState.entries.isNotEmpty;
}

class TransparentBackdrop extends StatefulWidget {
  final Color? backgroundColor;
  final Function? onDismiss;
  final bool blurBackground;

  const TransparentBackdrop({
    super.key,
    this.onDismiss,
    this.backgroundColor,
    this.blurBackground = false,
  });

  @override
  TransparentBackdropState createState() => TransparentBackdropState();
}

class TransparentBackdropState extends State<TransparentBackdrop>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _opacityTween;
  late Animation<double> _blurTween;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration:
          const Duration(milliseconds: AppConfig.overlayAnimationDuration),
      vsync: this,
    );
    _opacityTween = Tween<double>(begin: 0.0, end: 0.8).animate(
      CurvedAnimation(
        parent: _controller,
        curve: FluffyThemes.animationCurve,
      ),
    );
    _blurTween = Tween<double>(begin: 0.0, end: 2.5).animate(
      CurvedAnimation(
        parent: _controller,
        curve: FluffyThemes.animationCurve,
      ),
    );

    Future.delayed(const Duration(milliseconds: 100), () {
      if (mounted) _controller.forward();
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _opacityTween,
      builder: (context, _) {
        return Material(
          borderOnForeground: false,
          color: widget.backgroundColor
                  ?.withAlpha((_opacityTween.value * 255).round()) ??
              Colors.transparent,
          clipBehavior: Clip.antiAlias,
          child: InkWell(
            hoverColor: Colors.transparent,
            splashColor: Colors.transparent,
            focusColor: Colors.transparent,
            highlightColor: Colors.transparent,
            onTap: () {
              if (widget.onDismiss != null) {
                widget.onDismiss!();
              }
              MatrixState.pAnyState.closeOverlay();
            },
            child: AnimatedBuilder(
              animation: _blurTween,
              builder: (context, _) {
                return BackdropFilter(
                  filter: widget.blurBackground
                      ? ImageFilter.blur(
                          sigmaX: _blurTween.value,
                          sigmaY: _blurTween.value,
                        )
                      : ImageFilter.blur(sigmaX: 0, sigmaY: 0),
                  child: Container(
                    height: double.infinity,
                    width: double.infinity,
                    color: Colors.transparent,
                  ),
                );
              },
            ),
          ),
          // ),
        );
      },
    );
  }
}