It is now possible to override the application mouse tracking mode by using a configurable modifier key (ctrl, shift, alt and their combinations).

Custom highlighting support: Client code can now manipulate the visible terminal lines to add custom highlighting to TerminalCtrl.

TerminalCtrl has gained text search support. Client code can now add any type of custom text search method to TerminalCtrl. 

1) Selector Mode: TerminalCtrl now allows full keyboard navigation for selecting text in a special mode called "Selector Mode".
   At the moment, three types of selection are possible in this mode: text, rectangle, word.

2) Annotations:  This is a cool new feature. User or the hosted app can now add annotations to terminal texts (in both plain text and rich text (qtf) format).
   This can be done via user input (mouse, or keyboard in selector mode) or programatically (using a simple, proprietary protocol). AFAIK, this has been one of the most favored iterm2 features.

3) Word Selection filters: Word selection filter can now be set by the client code. It allows cell-level inspection, so it is even possible to select blocks of text ("words") according to their SGR attributes, associated data type, or colors.

4) Highlighting: TerminalCtrl allows full cell-level highlighting.

5) Shell integration: TerminalCtrl now allows hosted apps or shells to notify the terminal of the working directory, so the terminal can be aware of its environment (and act accordingly).

6) Configurable Keyboard shortcuts: Keyboard shortcuts are now configurable and can be redefined in client code.

OSC 9 ; 4 ; [state] ; [value] ST

1 - Running Doom in terminal emulator
2 - Navigating the open terminals, using the Navigator.
3 - Using the Finder to find text.
4 - Navigating through the open terminals using l/r keys.

- All PtyProcess classes are now derived from APtyProcess base class.
- On Windows, it is now possible to use both WinPty (as WinPtyProcess) and Windows console api (ConPtyProcess) at the same time
- On Linux the actual class is named as PosixPtyProcess.
- Existing code will work, since the PtyProcess is now an alias which designates PosixPtyProcess on *NIX systems, and depending on the WIN10 flag it designates either ConPty or WinPty. (Old behavior is kept.)
- Since they are all derived from the APtyProcess class, it is now possible to dynamically create and store them in the same container.

---

Requirements
- U++ >= 2024.1
- C++17

Customizability
- Custom Word/Cell Selection: Supports client-defined word selection via a filter. Selections can be based on text, SGR attributes, data types, or colors.
- Selector Mode: Introduced "Selector Mode" for keyboard navigation and text selection, supporting text, rectangle, line, and word selections. 
- Configurable keyboard Shortcuts: All shortcuts are made configurable and can be redefined in client code.
- Text Search: TerminalCtrl now have support for text search, including range-based and parallel (`CoFind`) search 
- Annotations: Users and hosted apps can now add annotations to terminal text (plain text or rich text via a simple protocol or menu).
- Custom Highlighting: Custom *cell-level* highlighting support.
- Application Mouse Tracking Override: Added the ability to override application mouse tracking with customizable modifier keys (Ctrl, Shift, Alt, and their combinations).
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Protocols
- Directory Change Protocol: Implements the `OSC 7` and `OSC 9 ; 9`protocols to notify the terminal of the shell's working directory.
- Message Notification Protocol: Implements the `OSC 9 ; 2` message notification support.
- Progress Notification Protocol: Implements the `OSC 9 ; 4` protocol, used by modern terminal emulators, this protocol allows tracking of progress from hosted applications.
- iTerm2 Background Image Protocol: Implements iTerm2's background image change protocol.
  
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Appearance
- Hyperlink Underline: Hyperlinks now switch to an under-dot pattern when using the underline attribute.
- Size Hint: The size hint now has rounded edges for better aesthetics.
  
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Bug Fixes
- Mouse Reporting: Fixed mouse reporting bug.
- PC-Style Keys: Fixed the handling of HOME/END keys in PC-style mode.
- Stray Unicode Character: Fixed the Alt+Win key combination issue that produced stray Unicode characters.
- Background Transparency: Addressed transparency and background rendering issues.
- Selection on Resize: Selections are now cleared properly when resizing the terminal.

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Performance Improvements
- Renderer Optimization: Refactored the renderer to combine non-contiguous characters, resulting in better performance
  
---

Behavior Changes
- Modifier Keys: `AltGr` and `Super` modifier keys no longer scroll the page.
- Page Scroll on Paste: The page now automatically scrolls to the bottom when pasting.
- Terminal Resize Behavior: Terminal lines are no longer truncated when resizing to a smaller window.

Code Maintenance
- Code Cleanup: Removed unused variables, redundant code.
- APtyProcess Base Class: 
  - All PtyProcess classes are now derived from APtyProcess.
  - On Linux, the active class is `PosixPtyProcess`.
  - On Windows, it can use either `WinPtyProcess` or `ConPtyProcess` based on system configuration.
  - This makes it possible to dynamically manage different PtyProcess types in a single container.

- Its API is virtually identical to SocketWaitEvent but for Pty processes.
- Provides a mechanism for waiting on multiple pseudoterminal (pty) processes to become ready for I/O operations.
- On windows it uses I/O Completion Ports (IOCP) to wait for events on process and pipe handles.
- On POSIX-compliant operating systems it uses the poll() system call to wait for events on pty/file descriptors
- On all platform this class effectively removes the  limitation of max 64 wait objects.

| Sequence                               | Description                                                         | Device Level |
| ---                                    | ---                                                                 | ---          |
|`OSC 133 ; [command] ST`                | Sets the semantic information, starting from the cursor position.   | Level 1      |

#### Notes

- `command` can be one of the following four values (case sensitive):
   - `A`: Marks the starting point of the shell prompt.
   - `B`: Marks the end of the shell prompt and the start of the user input.
   - `C`: Marks the end of the user input and the start of the command output.
   - `D`: Marks the end of the command output.

- TerminalCtrl currently supports only a minimal--but reasonable--subset of this protocol. This may change in the future.
- TerminalCtrl does not process or display semantic information by itself. Instead, it is up to the client code to make use of the protocol, typically in combination with features like cell highlighting or search functionality.