presentationFor method

Implementation

ShowcasePresentation? presentationFor(String anchorKey) {
  final state = _orchestrator.state;
  if (state == null) return null;
  final scope = VariableScope.fromSchemas(
    state.campaign.config.defaultVariables,
    state.payload.variables,
  );
  final config = state.config;
  final anchorGlobalKey = _registry.keyFor(anchorKey);
  final anchorContext = anchorGlobalKey.currentContext;
  final viewportWidth = anchorContext == null
      ? null
      : MediaQuery.maybeSizeOf(anchorContext)?.width;
  final designScale = viewportWidth != null
      ? campaignCanvasDesignScale(
          viewportWidth: viewportWidth,
          designWidth: config.designWidth,
        )
      : 1.0;

  final disableBarrier =
      config.outsideTapBehavior == OutsideTapBehavior.nothing;

  if (config is TooltipGuideConfig) {
    final step = _firstWhere(config.steps, (s) => s.anchorKey == anchorKey);
    if (step == null) return null;
    final canvas = step.canvas;
    return ShowcasePresentation(
      container: EngageActionContextScope(
        actionContext: _actionContext(state),
        child: VariableScopeProvider(
          scope: scope,
          child: GuideCanvasTooltipSurface(
            canvas: canvas,
            designWidth: config.designWidth,
            cornerRadius: step.cornerRadius,
            borderWidth: step.borderWidth,
            borderColor: step.borderColor,
            shadow: step.shadow,
            showArrow: step.showArrow,
            arrowSize: step.arrowSize,
            side: guideCanvasTooltipSide(step.placement),
            onActions: handleCanvasActions,
          ),
        ),
      ),
      // Tooltip = no dim (RN renders the bubble over a transparent scrim).
      overlayColor: const Color(0x00000000),
      overlayOpacity: 0,
      targetShapeBorder: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(8),
      ),
      targetBorderRadius: BorderRadius.circular(8),
      targetPadding: EdgeInsets.zero,
      targetGlowColor: const Color(0x00000000),
      targetGlowWidth: 0,
      tooltipPosition: _tooltipPosition(step.placement),
      targetTooltipGap: step.gap * designScale,
      disableBarrierInteraction: disableBarrier,
    );
  }
  if (config is SpotlightGuideConfig) {
    final step = _firstWhere(config.steps, (s) => s.anchorKey == anchorKey);
    if (step == null) return null;
    return _spotlightPresentation(
      step: step,
      config: config,
      scope: scope,
      designScale: designScale,
      disableBarrier: disableBarrier,
    );
  }
  return null;
}