fix: delete symbol issue fixed

Reviewer's Guide by Sourcery

This PR fixes an issue with deleting symbols between text by implementing a new deletion handling mechanism in the InlineImageProvider class. The implementation adds cursor management and text manipulation functionality, along with keyboard event handling for backspace operations.

Sequence diagram for handling backspace in text field

sequenceDiagram
    actor User
    participant HomeScreen
    participant InlineImageProvider
    User->>HomeScreen: Press backspace
    HomeScreen->>InlineImageProvider: handleDelete()
    InlineImageProvider->>InlineImageProvider: Determine start and end
    alt Deleting a single character
        InlineImageProvider->>InlineImageProvider: Check for placeholder
        InlineImageProvider->>InlineImageProvider: deleteInlineImage(start-1, start)
    end
    InlineImageProvider->>HomeScreen: Update text field

Updated class diagram for InlineImageProvider

classDiagram
    class InlineImageProvider {
        +void moveCursorToEnd()
        +void deleteInlineImage(int start, int end)
        +void handleDelete()
    }
    note for InlineImageProvider "New methods added for cursor management and deletion handling"

File-Level Changes

Change	Details	Files
Added new text manipulation and cursor management methods to handle symbol deletion	Implemented moveCursorToEnd method to handle cursor positioning Added deleteInlineImage method to handle text manipulation during deletion Implemented handleDelete method to manage both single character and selection deletions Added logic to handle special placeholder symbols (<<...>>) during deletion	`lib/providers/imageprovider.dart`
Enhanced text input field with keyboard event handling	Wrapped ExtendedTextField with KeyboardListener widget Added backspace key event detection Connected keyboard events to the new handleDelete functionality	`lib/view/homescreen.dart`

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#1068	Fix the ability to delete symbols from the EditText on homepage	✅

Possibly linked issues

#1068: The PR resolves the issue by implementing symbol deletion in the text input field.

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fossasia / badgemagic-android