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Document Content View

Overview​

The LMChatDocumentContentView is a subclass of LMChatMessageContentView designed to display document attachments. It manages the presentation of document previews, including support for multiple attachments and a "Show More" functionality.

Functionality​

Protocols Implemented​

UI Components​

  • docPreviewContainerStackView: A vertical LMStackView that contains document preview elements.
  • cancelRetryContainerStackView: A stack view for cancel and retry buttons (inherited from superclass).
  • loaderView: A view to display loading state (inherited from superclass).
  • retryView: A view to display retry option for failed messages (inherited from superclass).

Data Variables​

  • onShowMoreCallback: An optional closure called when the user taps to show more document attachments.

Methods​

  • setDataView(_:index:): Populates the view with data.
  • attachmentView(_:index:): Configures the view based on the document attachments.
  • docPreview(_:): Sets up the preview for document attachments.
  • createDocPreview(_:): Creates a document preview view for a single attachment.
  • prepareToResuse(): Prepares the view for reuse in a table or collection view.
  • didTapShowMore(): Handles the "Show More" action for multiple attachments.
  • updateRetryButton(_:): Updates the visibility of loader and retry views based on message status.

Customization​

To customize the LMChatDocumentContentView, you can subclass it and override its methods. Here's an example:

CustomDocumentContentView.swift
class CustomDocumentContentView: LMChatDocumentContentView {
    override func setupViews() {
        super.setupViews()
        // Add custom views or modify existing ones
    }

    override func attachmentView(_ data: LMChatMessageCell.ContentModel, index: IndexPath) {
        super.attachmentView(data, index: index)
        // Customize attachment view behavior
    }

    override func didTapShowMore() {
        super.didTapShowMore()
        // Add custom behavior when "Show More" is tapped
    }
}

To use the custom document content view in your app:

AppDelegate.swift
func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
    LMUIComponents.shared.documentsContentView = CustomDocumentContentView.self
    // ...
    return true
}