//! Default Action Processing for Keyboard Events

//!

//! This module implements W3C-compliant default actions for keyboard events.

//! Default actions are built-in behaviors that occur after event dispatch,

//! unless `event.prevent_default()` was called.

//!

//! ## W3C Event Model

//!

//! Per DOM Level 2/3 and W3C UI Events:

//!

//! 1. Event is dispatched through capture → target → bubble phases

//! 2. Callbacks can call `event.prevent_default()` to cancel default action

//! 3. After dispatch, if not prevented, the default action is performed

//!

//! ## Keyboard Default Actions

//!

//! | Key | Modifiers | Default Action |

//! |-----|-----------|----------------|

//! | Tab | None | Focus next element |

//! | Tab | Shift | Focus previous element |

//! | Enter | None | Activate focused element (if activatable) |

//! | Space | None | Activate focused element (if activatable) |

//! | Escape | None | Clear focus |

//!

//! ## Activation Behavior (HTML5)

//!

//! Per HTML5 spec, elements with "activation behavior" can be activated via

//! Enter or Space. This generates a synthetic click event:

//!

//! - Button elements

//! - Anchor elements with href

//! - Input elements (submit, button, checkbox, radio)

//! - Any element with a click callback

//!

//! See: https://html.spec.whatwg.org/multipage/interaction.html#activation-behavior

use alloc::vec::Vec;

use azul_core::{

    callbacks::FocusTarget,

    dom::{DomId, DomNodeId, NodeId},

    events::{DefaultAction, DefaultActionResult, ScrollAmount, ScrollDirection},

    window::{KeyboardState, VirtualKeyCode},

};

use crate::window::DomLayoutResult;

use std::collections::BTreeMap;

/// Determine the default action for a keyboard event based on the

/// current key, focused element, and whether `prevent_default()` was called.

    // If prevented, return early with no action

    // Get the current key (if any)

    };

    // Check modifier state

    // Determine action based on key

        // Tab navigation

        VirtualKeyCode::Tab => {

                // Ctrl+Tab / Alt+Tab are typically handled by OS

            } else {

            }

        }

        // Activation (Enter key)

        VirtualKeyCode::Return | VirtualKeyCode::NumpadEnter => {

                } else {

                    // Enter on non-activatable element - might submit form

                    // For now, no action (form handling could be added later)

                }

            } else {

            }

        }

        // Activation (Space key)

        VirtualKeyCode::Space => {

                // Space only activates if the focused element is activatable

                // and we're not in a text input

                {

                } else {

                    // Space in text input should insert space (handled by text input system)

                }

            } else {

            }

        }

        // Escape - clear focus

        VirtualKeyCode::Escape => {

            } else {

                // Could close modal/dialog here if any is open

            }

        }

        // Arrow keys - scroll or navigate

        VirtualKeyCode::Up | VirtualKeyCode::Down | VirtualKeyCode::Left | VirtualKeyCode::Right => {

            };

                } else {

                }

            } else {

            }

        }

        // Page Up/Down

        VirtualKeyCode::PageUp => {

        }

        VirtualKeyCode::PageDown => {

        }

        // Home/End

        VirtualKeyCode::Home => {

                // Ctrl+Home - go to start of document

            } else {

            }

        }

        VirtualKeyCode::End => {

                // Ctrl+End - go to end of document

            } else {

            }

        }

        // All other keys - no default action

    };

/// Check if an element is activatable (can receive synthetic click from Enter/Space).

    };

    };

/// Check if an element is a text input (where Space should insert text, not activate).

    };

    };

    };

    // Check if this node has a TextInput callback (FocusEventFilter::TextInput)

    // which indicates it's a text input field

    use azul_core::events::{EventFilter, FocusEventFilter};

/// Convert a DefaultAction to a FocusTarget for the focus manager.

///

/// This bridges the gap between the abstract DefaultAction and the

/// concrete FocusTarget that the FocusManager understands.

    }

#[cfg(test)]

mod tests {

    use super::*;

    use azul_core::styled_dom::NodeHierarchyItemId;

    #[test]

            false,

        );

    #[test]

        // Add LShift to pressed keys to simulate Shift being held

            false,

        );

    #[test]

            false,

        );

    #[test]

            true, // prevented!

        );

}