### Install the Cube example with Vulkan support

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Use the wayland build tag to install the cube example package.

```bash
go install -tags wayland github.com/neurlang/wayland/go-wayland-cube@latest
```

--------------------------------

### Setup and Generate Shaders

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-cube/SHADERS.md

Install the required glslang tools and execute the generation process to compile shaders.

```bash
# Install glslangValidator (one-time setup)
sudo apt install glslang-tools  # Ubuntu/Debian
# or
sudo dnf install glslang         # Fedora/RHEL

# Generate shaders
cd go-wayland-cube
go generate
```

--------------------------------

### Install Wayland Demos

Source: https://github.com/neurlang/wayland/blob/master/README.md

Commands to fetch and install the sample Wayland applications.

```bash
go get github.com/neurlang/wayland/...
```

```bash
go install github.com/neurlang/wayland/go-wayland-simple-shm@latest
go install github.com/neurlang/wayland/go-wayland-smoke@latest
go install github.com/neurlang/wayland/go-wayland-imageviewer@latest
go install -tags wayland github.com/neurlang/wayland/go-wayland-cube@latest
go install github.com/neurlang/wayland/go-wayland-texteditor@latest
go install github.com/neurlang/wayland/go-wayland-web-browser/browser@latest
```

--------------------------------

### Build and Run macOS Examples

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_RENDERING_FIX.md

Commands to compile and execute the example applications to verify rendering and event handling fixes.

```bash
# Build one of the example applications
go build -tags darwin,cgo ./go-wayland-simple-shm

# Or build the smoke demo
go build -tags darwin,cgo ./go-wayland-smoke

# Run it
./go-wayland-simple-shm
```

--------------------------------

### Initialize Rectangle

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Example of creating a new Rectangle instance.

```go
bounds := window.Rectangle{X: 0, Y: 0, Width: 800, Height: 600}
```

--------------------------------

### Install Demos for Older Go Versions

Source: https://github.com/neurlang/wayland/blob/master/README.md

Commands to fetch sample applications for Go versions 1.18 and above.

```bash
go get github.com/neurlang/wayland/go-wayland-simple-shm@latest
go get github.com/neurlang/wayland/go-wayland-smoke@latest
go get github.com/neurlang/wayland/go-wayland-imageviewer@latest
go get github.com/neurlang/wayland/go-wayland-texteditor@latest
```

--------------------------------

### Set decoration theme

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Example of applying a theme to a window.

```go
w.SetDecorationTheme(window.ThemeDark)
```

--------------------------------

### Implement and register keyboard handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Example implementation of the KeyboardHandler interface and registration with a window.

```go
type MyKeyboardHandler struct{}

func (h *MyKeyboardHandler) HandleKeyboardKey(ev window.KeyboardEvent) {
    // Process key press/release
}

func (h *MyKeyboardHandler) HandleKeyboardModifiers(ev window.ModifiersEvent) {
    // Process modifier changes
}

w.SetKeyboardHandler(&MyKeyboardHandler{})
```

--------------------------------

### Install Linux Runtime Dependencies

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

System-level installation commands for required keyboard support libraries on Debian/Ubuntu and Fedora/RHEL distributions.

```bash
# Debian/Ubuntu
sudo apt-get install libxkbcommon-dev

# Fedora/RHEL
sudo dnf install libxkbcommon-devel
```

--------------------------------

### Install Golang on Linux

Source: https://github.com/neurlang/wayland/blob/master/README.md

Commands to install the Go programming language on Debian-based or Fedora-based Linux distributions.

```bash
sudo apt-get install golang
```

```bash
sudo dnf install golang
```

--------------------------------

### Initialize and Run Window

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_WINDOW_FEATURES.md

Basic usage pattern for creating a display, initializing a window, and starting the blocking event loop.

```go
// Create display
display, _ := DisplayCreate(os.Args)

// Create window (200x200)
window := Create(display)
window.SetTitle("My App")

// Add widget with handler
widget := window.AddWidget(myHandler)

// Run event loop (blocks)
DisplayRun(display)
```

--------------------------------

### Install Xcode Command Line Tools and Build

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_IMPLEMENTATION.md

Commands to prepare the environment and build the project for macOS.

```bash
# Requires macOS with Xcode Command Line Tools
xcode-select --install

# Build tags automatically select darwin implementation
GOOS=darwin go build ./window
```

--------------------------------

### Implement Toplevel Handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Example implementation of a Toplevel handler.

```go
type MyToplevelHandler struct {
    toplevel *xdg.Toplevel
    surface  *xdg.Surface
}

func (h *MyToplevelHandler) HandleToplevelConfigure(ev xdg.ToplevelConfigureEvent) {
    fmt.Printf("Size: %dx%d\n", ev.Width, ev.Height)
    // Resize window as needed
}

func (h *MyToplevelHandler) HandleToplevelClose(ev xdg.ToplevelCloseEvent) {
    // User requested close
    os.Exit(0)
}

handler := &MyToplevelHandler{}
xdg.ToplevelAddListener(toplevel, handler)
```

--------------------------------

### Install Linux Dependencies

Source: https://github.com/neurlang/wayland/blob/master/README.md

Commands to install required system packages for Wayland, keyboard support, and Vulkan on Linux.

```bash
sudo apt-get install weston
```

```bash
sudo apt-get install libxkbcommon-dev
```

```bash
sudo dnf install libxkbcommon-devel
```

```bash
sudo apt-get install libwayland-dev libvulkan-dev
```

```bash
sudo apt-get install libnvidia-egl-wayland1
```

--------------------------------

### Install glslang on Arch Linux

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-cube/shaders/README.md

Install the required GLSL compiler tools on Arch Linux.

```bash
sudo pacman -S glslang
```

--------------------------------

### Initialize and Run a macOS Window

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_IMPLEMENTATION.md

Basic usage pattern for creating a display, a window, and starting the event loop.

```go
import "github.com/neurlang/wayland/window"

// Create display
display, err := window.DisplayCreate(os.Args)
if err != nil {
    log.Fatal(err)
}
defer display.Destroy()

// Create window
win := window.Create(display)
win.SetTitle("My macOS App")

// Add widget
widget := win.AddWidget(myHandler)

// Run event loop
window.DisplayRun(display)
```

--------------------------------

### Install glslang-tools on Ubuntu/Debian

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-cube/shaders/README.md

Install the required GLSL compiler tools on Debian-based distributions.

```bash
sudo apt install glslang-tools
```

--------------------------------

### Handle Key Events in Go

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_KEYSYMS.md

Example of switching on key codes using the xkbcommon package.

```go
import "github.com/neurlang/wayland/xkbcommon"

func handleKey(keyCode uint32) {
    switch keyCode {
    case xkbcommon.KeyQ, xkbcommon.KEYq:
        fmt.Println("Q key pressed")
    case xkbcommon.KeyEscape:
        fmt.Println("Escape pressed")
    case xkbcommon.KeyReturn:
        fmt.Println("Return pressed")
    }
}
```

--------------------------------

### Implement XDG Window Setup Pattern

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Standard boilerplate for creating an XDG surface and toplevel window, including necessary event listeners.

```go
package main

import (
    "github.com/neurlang/wayland/wl"
    "github.com/neurlang/wayland/wlclient"
    "github.com/neurlang/wayland/xdg"
)

type MyWindow struct {
    surface  *xdg.Surface
    toplevel *xdg.Toplevel
}

func (w *MyWindow) HandleSurfaceConfigure(ev xdg.SurfaceConfigureEvent) {
    w.surface.AckConfigure(ev.Serial)
}

func (w *MyWindow) HandleToplevelConfigure(ev xdg.ToplevelConfigureEvent) {
    // Resize buffers if needed
}

func (w *MyWindow) HandleToplevelClose(ev xdg.ToplevelCloseEvent) {
    // Clean exit
}

func createWindow(shell *xdg.WmBase, compositor *wl.Compositor, width, height int32) *MyWindow {
    // Create Wayland surface
    surface, err := compositor.CreateSurface()
    if err != nil {
        panic(err)
    }
    
    // Create XDG surface
    xdgSurface, err := shell.GetXdgSurface(surface)
    if err != nil {
        panic(err)
    }
    
    // Create toplevel
    toplevel, err := xdgSurface.GetToplevel()
    if err != nil {
        panic(err)
    }
    
    // Set properties
    toplevel.SetTitle("My App")
    toplevel.SetAppId("com.example.myapp")
    
    // Register handlers
    window := &MyWindow{surface: xdgSurface, toplevel: toplevel}
    xdgSurface.AddListener(window)
    xdg.ToplevelAddListener(toplevel, window)
    
    // Commit to make visible
    surface.Commit()
    
    return window
}
```

--------------------------------

### Install glslang on Fedora/RHEL

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-cube/shaders/README.md

Install the required GLSL compiler tools on Fedora or RHEL-based distributions.

```bash
sudo dnf install glslang
```

--------------------------------

### Configure Darwin Build Prerequisites

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_BUILD_NOTES.md

Install Xcode Command Line Tools and verify that CGO is enabled for the build environment.

```bash
# Ensure Xcode Command Line Tools are installed
xcode-select --install

# Verify CGO is enabled
go env CGO_ENABLED  # should be "1"
```

--------------------------------

### Test and Build Applications on macOS

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_BUILD_NOTES.md

Commands to build the window package, run tests, and compile example applications on a macOS system.

```bash
# Build the window package
go build ./window

# Run tests (if any)
go test ./window

# Build example applications
go build ./go-wayland-simple-shm
go build ./go-wayland-smoke
```

--------------------------------

### Use PointerDestroy in Client Code

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Example of managing a pointer proxy lifecycle using defer.

```go
pointer, err := seat.GetPointer()
if err != nil {
    panic(err)
}
defer wlclient.PointerDestroy(pointer)

// Use pointer...
```

--------------------------------

### func DisplayGetRegistry(d *wl.Display) (*wl.Registry, error)

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Gets the global registry from the display.

```APIDOC
## func DisplayGetRegistry(d *wl.Display)

### Description
Gets the global registry.

### Parameters
- **d** (*wl.Display) - Required - Display

### Return Value
- ***wl.Registry** - Registry proxy
- **error** - Request error
```

--------------------------------

### Implement and register close handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Example implementation of the CloseHandler interface to manage application exit.

```go
type MyCloseHandler struct{}

func (h *MyCloseHandler) HandleClose(w *window.Window) {
    // Clean up and exit
    os.Exit(0)
}

w.SetCloseHandler(&MyCloseHandler{})
```

--------------------------------

### Integrate error handling in wl package

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/08-external-package.md

Example of wrapping errors within the wl context to provide additional diagnostic information.

```go
// wl/context.go
func (ctx *Context) run(cb *Callback) error {
    ev, err := ctx.readEvent()
    if err != nil {
        if err == io.EOF {
            return ErrContextRunConnectionClosed
        }
        // Extract underlying error if wrapped
        return combinedError{ErrContextRunEventReadingError, err}
    }
    // ...
}
```

--------------------------------

### Initialize and manage window decorations

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_IMPLEMENTATION.md

Demonstrates the lifecycle of a window decoration, including creation, state updates, and cleanup.

```go
// Create decoration for a window
decoration := window.NewWindowDecoration(myWindow)

// Show decorations
err := decoration.Show()

// Update active state
decoration.SetActive(true)

// Update hover state
decoration.SetHoverButton(window.ComponentButtonClose)

// Redraw when needed
decoration.Redraw()

// Clean up
decoration.Destroy()
```

--------------------------------

### Create and Configure a Window

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Initializes a surface and toplevel window, sets application metadata, and registers event listeners for configuration and closure.

```go
// Create surfaces
wlSurface, err := compositor.CreateSurface()
xdgSurface, err := shell.GetXdgSurface(wlSurface)
toplevel, err := xdgSurface.GetToplevel()

// Set properties
toplevel.SetTitle("My App")
toplevel.SetAppId("com.example.myapp")

// Register handlers for configuration
type Handler struct{ toplevel *xdg.Toplevel }
func (h *Handler) HandleToplevelConfigure(ev xdg.ToplevelConfigureEvent) {
    h.toplevel.SetWindowGeometry(0, 0, ev.Width, ev.Height)
}
func (h *Handler) HandleToplevelClose(ev xdg.ToplevelCloseEvent) {
    os.Exit(0)
}
h := &Handler{toplevel: toplevel}
xdg.ToplevelAddListener(toplevel, h)

// Make visible
wlSurface.Commit()
```

--------------------------------

### Get the Wayland registry

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Retrieves the global registry proxy from the display.

```go
registry, err := wlclient.DisplayGetRegistry(display)
if err != nil {
    panic(err)
}
```

--------------------------------

### Implement a Basic Wayland Client

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

A standard pattern for connecting to a display, registering for globals, and running the event loop.

```go
package main

import (
    "github.com/neurlang/wayland/wl"
    "github.com/neurlang/wayland/wlclient"
)

type MyApp struct{}

func (app *MyApp) HandleSeatCapabilities(ev wl.SeatCapabilitiesEvent) {
    // Seat capabilities changed
}

func (app *MyApp) HandleSeatName(ev wl.SeatNameEvent) {
    // Seat name
}

func main() {
    // Connect
    display, err := wlclient.DisplayConnect([]byte(""))
    if err != nil {
        panic(err)
    }
    defer wlclient.DisplayDisconnect(display)
    
    // Get registry
    registry, err := wlclient.DisplayGetRegistry(display)
    if err != nil {
        panic(err)
    }
    
    // Listen for globals
    app := &MyApp{}
    wlclient.RegistryAddListener(registry, app)
    
    // Process events
    for {
        err := wlclient.DisplayRun(display)
        if err != nil {
            break
        }
    }
}
```

--------------------------------

### Initialize and run Go WebAssembly module

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-smoke/index.html

Instantiates the WebAssembly module from the specified path and executes the Go runtime.

```javascript
const go = new Go(); WebAssembly.instantiateStreaming(fetch("smoke_wasm.wasm"), go.importObject) .then(result => go.run(result.instance));
```

--------------------------------

### Retrieve single keysym

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Convenience method to get a single keysym for a keycode.

```go
func (s *State) KeyGetOneSym(code uint32) uint32
```

--------------------------------

### Compile the project for Linux

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Build the project using pure Go without requiring cgo.

```bash
go build .  # Pure Go; no cgo required
```

--------------------------------

### Get Popup Cairo surface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Retrieves the surface used for rendering content to the popup.

```go
func (p *Popup) PopupGetSurface() cairo.Surface
```

```go
surf := popup.PopupGetSurface()
// Render menu items to surf
```

--------------------------------

### Initialize Window Decoration

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_SUMMARY.md

Create a new decoration instance associated with a specific window.

```go
decoration := window.NewWindowDecoration(myWindow)
```

--------------------------------

### Create New Shell Instance

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Constructor for initializing a new window manager base instance.

```go
func NewShell(ctx *Context) *WmBase
```

```go
shell := xdg.NewShell(ctx)
// Bind to registry global
```

--------------------------------

### Process Keyboard Events with xkbcommon

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Demonstrates the lifecycle of creating a context, keymap, and state to process keyboard input and character conversion.

```go
package main

import (
    "fmt"
    "github.com/neurlang/wayland/xkbcommon"
)

func processKeyboardEvent(keymapData []byte, depressed, latched, locked, layout uint32, keycode uint32) {
    // Create context and keymap
    ctx := xkbcommon.ContextNew(0)
    defer xkbcommon.ContextUnref(ctx)
    
    km := ctx.KeymapNewFromString(keymapData, 1, 0)
    defer xkbcommon.KeymapUnref(km)
    
    // Create keyboard state
    state := km.StateNew()
    defer xkbcommon.StateUnref(state)
    
    // Update modifier state
    state.UpdateMask(depressed, latched, locked, layout, 0, 0)
    
    // Get keysym and convert to character
    sym, ok := state.KeyGetSyms(keycode)
    if ok {
        utf32 := state.KeyGetUtf32(sym)
        if utf32 != 0 {
            fmt.Printf("Key: %c\n", rune(utf32))
        }
    }
    
    // Handle key repeat
    if km.KeyRepeats(keycode) {
        fmt.Println("Key repeats when held")
    }
}
```

--------------------------------

### Check modifier key state

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Example of checking if the Control key is pressed using bitwise operations.

```go
if mods&window.ModControlMask != 0 {
    // Control key is pressed
}
```

--------------------------------

### Convert Fixed point coordinate

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Example of converting a Fixed type coordinate from a pointer event to a float64.

```go
// From Wayland pointer event with Fixed coordinates
fixedX := ev.SurfaceX  // Fixed type
floatX := wl.FixedToFloat(fixedX)  // Convert to float64
```

--------------------------------

### Create a Darwin Window

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_WINDOW_FEATURES.md

Initializes a new window with a default size of 200x200 pixels.

```go
w := Create(display)
// Creates a 200x200 window
```

--------------------------------

### Implement Cursor Changes in Cocoa

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_CONSTANTS.md

Example of mapping integer cursor types to native NSCursor objects in Objective-C.

```objective-c
// In Cocoa/Objective-C
switch (cursorType) {
    case 1: // CursorHand1
        [[NSCursor pointingHandCursor] set];
        break;
    case 2: // CursorLeftPtr
        [[NSCursor arrowCursor] set];
        break;
    case 3: // CursorIbeam
        [[NSCursor IBeamCursor] set];
        break;
    // ... etc
}
```

--------------------------------

### Handle ErrFileIsNil OS Error

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/errors.md

Demonstrates checking for a nil file descriptor when file creation fails.

```go
fd, err := os.CreateAnonymousFile(1024)
if err == os.ErrFileIsNil {
    fmt.Println("Failed to create temporary file")
}
```

--------------------------------

### Manage XKB Context

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Defines the keyboard layout context manager and its initialization.

```go
type Context struct {
    // Opaque pointer to xkb_context
}
```

```go
ctx := xkbcommon.ContextNew(0)
defer xkbcommon.ContextUnref(ctx)
```

--------------------------------

### Build and Run Browser

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_MOUSE_CLICK.md

Commands to build and execute the browser application with the necessary build tags.

```bash
go build -tags darwin,cgo ./go-wayland-web-browser/browser
./go-wayland-web-browser/browser/browser
```

--------------------------------

### Show Decorations

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_SUMMARY.md

Display the decoration, which initializes shadow and titlebar subsurfaces and performs the initial draw.

```go
err := decoration.Show()
// Creates shadow and titlebar subsurfaces
// Draws initial decoration content
```

--------------------------------

### Run Smoke Demo

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_INTEGRATION.md

Commands to build and execute the smoke test application to verify decoration rendering.

```bash
# Build and run smoke demo
go build -o go-wayland-smoke/smoke ./go-wayland-smoke
./go-wayland-smoke/smoke

# Or use the run script
./run-smoke.sh
```

--------------------------------

### Connect to Wayland Compositor

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Establishes a connection to the Wayland display and retrieves the registry to bind global interfaces.

```go
package main

import (
    "github.com/neurlang/wayland/wl"
    "github.com/neurlang/wayland/wlclient"
)

func main() {
    // Connect to compositor
    display, err := wlclient.DisplayConnect([]byte(""))
    if err != nil {
        panic(err)
    }
    defer wlclient.DisplayDisconnect(display)
    
    // Get registry
    registry, err := wlclient.DisplayGetRegistry(display)
    if err != nil {
        panic(err)
    }
    
    // Bind interfaces
    compositor := wlclient.RegistryBindCompositorInterface(registry, globalName, version)
    seat := wlclient.RegistryBindSeatInterface(registry, seatGlobalName, seatVersion)
    shell := wlclient.RegistryBindWmBaseInterface(registry, shellGlobalName, shellVersion)
}
```

--------------------------------

### NewShell

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Creates a new instance of the XDG Window Manager Base.

```APIDOC
## func NewShell(ctx *Context) *WmBase

### Description
Creates a new window manager base instance to interact with the XDG shell protocol.

### Parameters
- **ctx** (*Context) - Required - Wayland context

### Return Value
- ***WmBase** - New shell instance
```

--------------------------------

### Configure Keyboard Locale

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Sets up keyboard compose sequences by initializing an xkbcommon context and a locale-specific compose table.

```go
ctx := xkbcommon.ContextNew(0)
table := ctx.ComposeTableNewFromLocale("en_US.UTF-8", 0)
composeState := xkbcommon.ComposeStateNew(table, 0)
```

--------------------------------

### ContextNew

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Creates a new keyboard context.

```APIDOC
## func ContextNew(flags uint32) *Context

### Description
Creates a new keyboard context.

### Parameters
- **flags** (uint32) - Required - Context creation flags (typically 0)

### Return Value
- ***Context** - New keyboard context
```

--------------------------------

### Manage XKB Keymap

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Defines the keyboard layout mapping structure and its creation from a string.

```go
type Keymap struct {
    // Opaque pointer to xkb_keymap
}
```

```go
keymap := ctx.KeymapNewFromString(keymapBytes, 1, 0)
```

--------------------------------

### Set Toplevel Title

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Sets the window title string.

```go
toplevel.SetTitle("My Application")
```

--------------------------------

### Use XKB State Components

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Defines flags for keyboard state components and demonstrates serializing modifiers.

```go
type StateComponent uint32
```

```go
component := xkbcommon.StateComponent(...)
state.SerializeMods(component)
```

--------------------------------

### Context.KeymapNewFromString

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Creates a keymap from an XKB keymap string.

```APIDOC
## func (ctx *Context) KeymapNewFromString(str []byte, a, b uint32) *Keymap

### Description
Creates a keymap from an XKB keymap string (typically from WAYLAND_KEYMAP_FORMAT_XKB_V1).

### Parameters
- **str** ([]byte) - Required - XKB keymap in text format
- **a** (uint32) - Required - Keymap format (typically 1 for XKB_KEYMAP_FORMAT_TEXT_V1)
- **b** (uint32) - Required - Keymap compilation flags (typically 0)

### Return Value
- ***Keymap** - New keymap
```

--------------------------------

### Connect to Wayland display in Go

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Demonstrates connecting to the display; fails if XDG_RUNTIME_DIR is not set.

```go
display, err := wl.Connect("")
// Fails if XDG_RUNTIME_DIR not set
```

--------------------------------

### Integrate xkbcommon in Wayland Window Input

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Shows how to integrate xkbcommon within a Wayland input handler to process keymap events and translate key codes.

```go
// In window package (window/window_linux.go)
type Input struct {
    xkbKeymap *xkb.Keymap
    xkbState  *xkb.State
    // ...
}

func (i *Input) HandleKeyboardKeymap(ev wl.KeyboardKeymapEvent) {
    // Parse keymap from Wayland
    keymapData := ev.Keymap
    
    // Create XKB keymap
    i.xkbKeymap = ctx.KeymapNewFromString(keymapData, 1, 0)
    i.xkbState = i.xkbKeymap.StateNew()
}

func (i *Input) HandleKeyboardKey(ev wl.KeyboardKeyEvent) {
    // Translate key using XKB
    keysym, ok := i.xkbState.KeyGetSyms(ev.Key)
    if ok {
        utf32 := i.xkbState.KeyGetUtf32(keysym)
        // Use character
    }
}
```

--------------------------------

### Create Keymap from String

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Initialize a keymap from raw byte data, typically received from a Wayland keymap event.

```go
// From Wayland keyboard keymap event
keymap := ctx.KeymapNewFromString(keymapData, 1, 0)
defer xkbcommon.KeymapUnref(keymap)
```

--------------------------------

### Initialize and Release Context

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Create a new keyboard context and ensure it is released to prevent memory leaks.

```go
ctx := xkbcommon.ContextNew(0)
defer xkbcommon.ContextUnref(ctx)
```

```go
defer xkbcommon.ContextUnref(ctx)
```

--------------------------------

### Create Rendering Surface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Initializes an image surface using cairoshim by calculating the required stride and buffer size based on dimensions and color format.

```go
width, height := 1920, 1080
stride := cairoshim.FormatStrideForWidth(cairoshim.FormatArgb32, width)
bufferSize := stride * height

data := make([]byte, bufferSize)
surf := cairoshim.ImageSurfaceCreateForData(
    data,
    cairoshim.FormatArgb32,
    width, height,
    stride,
)
```

--------------------------------

### Manage XKB State

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Defines the keyboard state tracker and its initialization from a keymap.

```go
type State struct {
    // Opaque pointer to xkb_state
}
```

```go
state := keymap.StateNew()
```

--------------------------------

### Create and Manipulate Image Surface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/04-cairoshim.md

Demonstrates creating an ARGB32 surface from a byte slice and performing manual pixel manipulation.

```go
package main

import "github.com/neurlang/wayland/cairoshim"

func main() {
    // Create a 1024x768 ARGB32 surface
    width, height := 1024, 768
    stride := cairoshim.FormatStrideForWidth(cairoshim.FormatArgb32, width)
    data := make([]byte, stride*height)
    
    surf := cairoshim.ImageSurfaceCreateForData(
        data,
        cairoshim.FormatArgb32,
        width,
        height,
        stride,
    )
    
    // Draw to the surface
    drawPixels(surf)
    
    // Cleanup
    defer surf.Destroy()
}

func drawPixels(surf cairoshim.Surface) {
    data := surf.ImageSurfaceGetData()
    width := surf.ImageSurfaceGetWidth()
    stride := surf.ImageSurfaceGetStride()
    
    // Draw red rectangle at (10,10) with size 100x100
    for y := 10; y < 110; y++ {
        for x := 10; x < 110; x++ {
            offset := y*stride + x*4
            // ARGB32: A, R, G, B bytes
            data[offset+0] = 255 // B
            data[offset+1] = 0   // G
            data[offset+2] = 0   // R
            data[offset+3] = 255 // A
        }
    }
}
```

--------------------------------

### Check Subcompositor Support

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_INTEGRATION.md

Verify if the display supports the subcompositor protocol required for decorations.

```go
if display.subcompositor == nil {
    println("No subcompositor support")
}
```

--------------------------------

### Implement Window Event Handlers

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Define a struct to handle window events and register it with the window instance to manage keyboard input and lifecycle events.

```go
package main

import (
    "github.com/neurlang/wayland/window"
    "github.com/neurlang/wayland/wl"
)

type MyApp struct{}

func (app *MyApp) HandleKeyboardKey(ev window.KeyboardEvent) {
    // Handle key press
}

func (app *MyApp) HandleClose(w *window.Window) {
    // Clean up
    os.Exit(0)
}

func main() {
    // Platform-specific window creation
    // w := window.NewWindow(...)
    
    handler := &MyApp{}
    w.SetKeyboardHandler(handler)
    w.SetCloseHandler(handler)
    
    // Run event loop
    // w.Run()
}
```

--------------------------------

### Update Decoration Strategy

Source: https://github.com/neurlang/wayland/blob/master/doc/SOLUTION_SUMMARY.md

Transition from destroying and recreating decoration surfaces to updating existing ones during window resize operations.

```go
// Before: Window.decoration.Destroy() + recreate
// After:  Window.decoration.UpdateSize()
```

--------------------------------

### Manage Toplevel Window States

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Methods for setting and unsetting window states like maximized and fullscreen.

```go
// Maximize window
toplevel.SetMaximized()

// Enter fullscreen on specific output
output := ...  // Get from output events
toplevel.SetFullscreen(output)

// Exit fullscreen
toplevel.UnsetFullscreen()
```

--------------------------------

### Bind Output Interface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Binds the output interface for display or monitor management.

```go
func RegistryBindOutputInterface(r *wl.Registry, name, version uint32) *wl.Output
```

--------------------------------

### Verify Windows Build

Source: https://github.com/neurlang/wayland/blob/master/doc/WINDOWS_RENDERING_OPTIMIZATION.md

Command to verify that the modified window rendering code compiles correctly.

```bash
go build -v ./window
```

--------------------------------

### Including Separate C Files

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_CGO_FIX.md

Use CGO flags to include separate C implementation files.

```go
/*
#cgo CFLAGS: -I./include
#include "window_impl.c"
*/
import "C"
```

--------------------------------

### Generate Go Shader Files

Source: https://github.com/neurlang/wayland/blob/master/go-wayland-cube/shaders/README.md

Execute the generation process to compile GLSL shaders and create the corresponding Go files.

```bash
go generate
```

--------------------------------

### Run Keyboard Test Application

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_KEYBOARD_SUPPORT.md

Executes the provided test script to verify keyboard event handling functionality.

```bash
./run-keyboard-test.sh
```

--------------------------------

### Define Buffer and Surface constants

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Constants for configuring surface buffer types, opacity, and resize hints.

```go
const BufferTypeEglWindow = 0    // EGL surface
const BufferTypeShm = 1          // Shared memory surface
```

```go
const SurfaceOpaque = 0x01       // Surface is fully opaque
const SurfaceShm = 0x02          // Use shared memory

const SurfaceHintResize = 0x10   // Resizable window
const SurfaceHintRgb565 = 0x100  // 16-bit color format
```

```go
const PreferredFormatNone = 0    // No preference
const PreferredFormatRgb565 = 1  // 16-bit RGB preferred
```

--------------------------------

### Represent Pixel Data

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/04-cairoshim.md

Demonstrates how to represent ARGB32 and RGB565 pixel data as byte arrays.

```go
// ARGB32 pixel: Red (255,0,0) with full opacity
pixelData := [4]byte{0, 0, 255, 255}  // B, G, R, A

// RGB565 pixel: Red
pixelData16 := [2]byte{0, 248}  // Red in 16-bit format
```

--------------------------------

### Connect to Wayland compositor

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/01-wl-core.md

Establishes a connection to the compositor using the specified socket address or environment defaults.

```go
package main

import (
    "github.com/neurlang/wayland/wl"
)

func main() {
    display, err := wl.Connect("")
    if err != nil {
        panic(err)
    }
    defer display.Context().Close()
    
    // Use display to get registry and bind interfaces
}
```

--------------------------------

### Create Cairo Image Surface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Initializes an image surface using a byte slice and specified format parameters.

```go
data := make([]byte, stride*height)
surf := cairoshim.ImageSurfaceCreateForData(
    data,
    cairoshim.FormatArgb32,
    width, height,
    stride,
)
```

--------------------------------

### Toplevel Window State Methods

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Methods to manage window states like maximized, minimized, and fullscreen.

```APIDOC
## Window State Methods

### Methods
- **SetMaximized() error**
- **UnsetMaximized() error**
- **SetMinimized() error**
- **SetFullscreen(output *wl.Output) error**
- **UnsetFullscreen() error**

### Parameters
- **output** (*wl.Output) - Optional - The preferred output for fullscreen mode.
```

--------------------------------

### Build and Test Wayland Text Editor

Source: https://github.com/neurlang/wayland/blob/master/doc/FLICKER_FIXES.md

Commands to compile the text editor and execute the test script to verify flicker-free performance.

```bash
go build -o go-wayland-texteditor/texteditor ./go-wayland-texteditor
./run-texteditor.sh
```

--------------------------------

### func Connect(addr string) (*Display, error)

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/01-wl-core.md

Establishes a connection to a Wayland compositor using a Unix socket address.

```APIDOC
## func Connect(addr string) (*Display, error)

### Description
Establishes a connection to a Wayland compositor. If the address is empty, it defaults to the WAYLAND_DISPLAY environment variable or "wayland-0", prefixed with XDG_RUNTIME_DIR.

### Parameters
- **addr** (string) - Required - Unix socket address.

### Return Value
- **Display** (*Display) - Connected display proxy.
- **error** (error) - Returns ErrXdgRuntimeDirNotSet if XDG_RUNTIME_DIR is missing, or net.Error on socket failure.
```

--------------------------------

### Process Keyboard Input

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Translate raw keycodes into symbols and UTF-32 characters using XKB state.

```go
keymap := ctx.KeymapNewFromString(keymapData, 1, 0)
state := keymap.StateNew()
state.UpdateMask(depressed, latched, locked, layout, 0, 0)
sym, _ := state.KeyGetSyms(keycode)
utf32 := state.KeyGetUtf32(sym)
```

--------------------------------

### Implement KeyboardHandler Interface

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_KEYBOARD_SUPPORT.md

Applications must implement this interface to receive keyboard events and focus notifications.

```go
type KeyboardHandler interface {
    Key(Window *Window, Input *Input, time uint32, vKey uint32, code uint32, state wl.KeyboardKeyState, data WidgetHandler)
    Focus(Window *Window, Input *Input)
}
```

--------------------------------

### Handle error wrapping patterns

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/08-external-package.md

Demonstrates manual unwrapping and standard Go library approaches for error inspection.

```go
// Example from wl/event.go
return combinedError{ErrReadHeader, err}

// To get underlying syscall error:
if perr, ok := err.(interface { Unwrap() error }); ok {
    underlying := perr.Unwrap()
}
```

```go
import "errors"

if errors.Is(err, ErrReadHeader) {
    // Is this error or one it wraps?
}

if errors.As(err, &netErr) {
    // Extract specific type
}

underlying := errors.Unwrap(err)
```

--------------------------------

### Create popup window

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Initializes a new popup window anchored to specific coordinates relative to the parent.

```go
popup := window.CreatePopup(seat, serial, 200, 300, 100, 150)
// Render menu items to popup.GetSurface()
```

--------------------------------

### Register Keyboard Listeners

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Registers all keyboard handlers at once.

```go
func KeyboardAddListener(kb *wl.Keyboard, l KeyboardListener)
```

--------------------------------

### Surface.AckConfigure

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Acknowledges a surface configuration event.

```APIDOC
## func (s *Surface) AckConfigure(serial uint32) error

### Description
Acknowledges a configure event. This must be called after every configure event to ensure proper compositor synchronization.

### Parameters
- **serial** (uint32) - Required - Serial from the configure event

### Return Value
- **error** - Returns a protocol error if the acknowledgement fails
```

--------------------------------

### Create Keyboard State

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Initialize a new keyboard state from an existing keymap to track modifiers and key presses.

```go
keymap := ctx.KeymapNewFromString(keymapData, 1, 0)
state := keymap.StateNew()
defer xkbcommon.StateUnref(state)
```

--------------------------------

### Register Output Listeners

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Registers all output handlers at once.

```go
func OutputAddListener(o *wl.Output, h OutputListener)
```

--------------------------------

### Perform a display roundtrip

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Synchronously waits for the compositor to process all pending requests by sending a sync request.

```go
// Ensure all config changes are applied
err := wlclient.DisplayRoundtrip(display)
if err != nil {
    panic(err)
}
```

--------------------------------

### Verification Command

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_CGO_FIX.md

Verify the fix by building the package on macOS.

```bash
go build ./window
# Should complete without duplicate symbol errors
```

--------------------------------

### Use ProxyId for lookup

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Demonstrates looking up a proxy object using a specific ProxyId.

```go
ctx := wl.Connect("")
proxy := ctx.LookupProxy(wl.ProxyId(1))
```

--------------------------------

### Forward Mouse Movement to Go

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_WINDOW_FEATURES.md

Converts window coordinates and forwards mouse motion events to the Go runtime.

```objc
- (void)mouseMoved:(NSEvent *)event {
    if (goWindowPtr) {
        NSPoint location = [self convertPoint:[event locationInWindow] fromView:nil];
        goMouseMotion(goWindowPtr, location.x, location.y);
    }
}
```

--------------------------------

### Build Darwin Window Package

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_BUILD_NOTES.md

Standard build command for the window package on macOS, which automatically includes platform-specific files.

```bash
# On macOS, build normally
go build ./window

# The build system will automatically include:
# - window_darwin.go
# - widget_darwin.go  
# - widget_handler_darwin.go
```

--------------------------------

### Connect to Wayland display with socket options

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/configuration.md

Shows implicit usage of environment variables versus explicit socket name specification.

```go
// Empty string uses WAYLAND_DISPLAY env var, falls back to "wayland-0"
display, err := wl.Connect("")

// Explicit socket name
display, err := wl.Connect("wayland-1")
```

--------------------------------

### Configure CGO for Objective-C

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_IMPLEMENTATION.md

Required CGO flags to enable Objective-C compilation and link against necessary macOS frameworks.

```go
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework Cocoa -framework QuartzCore
```

--------------------------------

### Create shared memory buffer

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/02-os-package.md

Demonstrates creating an anonymous file for Wayland surfaces, handling the ErrUnlink case.

```go
package main

import (
    "github.com/neurlang/wayland/os"
)

func createShmBuffer(sizeBytes int64) (*os.File, error) {
    fd, err := os.CreateAnonymousFile(sizeBytes)
    if err != nil && err != os.ErrUnlink {
        return nil, err
    }
    return fd, nil
}
```

--------------------------------

### Compare Slice-based and Map-based Handler Storage

Source: https://github.com/neurlang/wayland/blob/master/doc/PROTOCOL_REGENERATION_COMPLETE.md

Comparison of the legacy slice-based implementation and the new map-based implementation for Wayland protocol handlers.

```go
type ZwpShellV1 struct {
    BaseProxy
    mu sync.RWMutex
    capabilityHandlers []ZwpShellV1CapabilityHandler
}

func (p *ZwpShellV1) Dispatch(event *Event) {
    p.mu.RLock()
    for _, h := range p.capabilityHandlers {
        p.mu.RUnlock()
        h.HandleCapability(ev)
        p.mu.RLock()
    }
    p.mu.RUnlock()
}
```

```go
type ZwpShellV1 struct {
    BaseProxy
    mu sync.RWMutex
    privateZwpShellV1Capabilitys map[ZwpShellV1CapabilityHandler]struct{}
}

func NewZwpShellV1(ctx *Context) *ZwpShellV1 {
    ret := new(ZwpShellV1)
    ret.privateZwpShellV1Capabilitys = make(map[ZwpShellV1CapabilityHandler]struct{})
    ctx.Register(ret)
    return ret
}

func (p *ZwpShellV1) Dispatch(event *Event) {
    p.mu.RLock()
    for h := range p.privateZwpShellV1Capabilitys {
        h.HandleCapability(ev)
    }
    p.mu.RUnlock()
}

func (p *ZwpShellV1) AddCapabilityHandler(h ZwpShellV1CapabilityHandler) {
    if h != nil {
        p.mu.Lock()
        p.privateZwpShellV1Capabilitys[h] = struct{}{}
        p.mu.Unlock()
    }
}

func (p *ZwpShellV1) RemoveCapabilityHandler(h ZwpShellV1CapabilityHandler) {
    p.mu.Lock()
    defer p.mu.Unlock()
    delete(p.privateZwpShellV1Capabilitys, h)
}
```

--------------------------------

### Update Decoration State

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_SUMMARY.md

Manage decoration appearance by setting focus, hover states, and triggering manual redraws.

```go
decoration.SetActive(true)        // Window focused
decoration.SetHoverButton(btn)    // Mouse hover
decoration.Redraw()               // Force redraw
```

--------------------------------

### Create a new ComposeState

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/05-xkbcommon.md

Initializes a new compose state from a locale-specific table. Ensure the state is released using ComposeStateUnref when finished.

```go
table := ctx.ComposeTableNewFromLocale("en_US.UTF-8", 0)
composeState := xkbcommon.ComposeStateNew(table, 0)
defer xkbcommon.ComposeStateUnref(composeState)
```

--------------------------------

### RegistryBindOutputInterface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Binds the output interface.

```APIDOC
## func RegistryBindOutputInterface(r *wl.Registry, name, version uint32) *wl.Output

### Description
Binds the output (display/monitor) interface from the registry.
```

--------------------------------

### Register and Dispatch Events

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Register event handlers and execute the event loop to process incoming events.

```go
// Register handler
pointer.AddMotionHandler(myHandler)

// In event loop:
for {
    ctx.Run()  // Reads event, dispatches to handler
}
```

--------------------------------

### Register Registry Listeners

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Registers all registry handlers at once.

```go
func RegistryAddListener(r *wl.Registry, data RegistryListener)
```

--------------------------------

### Header File Definition

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_CGO_FIX.md

Use header guards when sharing C functions across multiple Go files.

```c
// window_darwin.h
#ifndef WINDOW_DARWIN_H
#define WINDOW_DARWIN_H

void sharedFunction();

#endif
```

--------------------------------

### Handle Input Events

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Registers handlers for pointer motion and keyboard input, utilizing xkbcommon for key symbol translation.

```go
type InputHandler struct{}

func (h *InputHandler) HandlePointerMotion(ev wl.PointerMotionEvent) {
    x := wl.FixedToFloat(ev.SurfaceX)
    y := wl.FixedToFloat(ev.SurfaceY)
    fmt.Printf("Pointer: %.1f, %.1f\n", x, y)
}

func (h *InputHandler) HandleKeyboardKey(ev wl.KeyboardKeyEvent) {
    // Translate via xkbcommon
    sym, ok := xkbState.KeyGetSyms(ev.Key)
    if ok {
        utf32 := xkbState.KeyGetUtf32(sym)
        fmt.Printf("Key: %c\n", rune(utf32))
    }
}

// Register with seat
pointer, _ := seat.GetPointer()
keyboard, _ := seat.GetKeyboard()
handler := &InputHandler{}
pointer.AddMotionHandler(handler)
keyboard.AddKeyHandler(handler)
```

--------------------------------

### Handle ErrXdgRuntimeDirNotSet

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/errors.md

Check for missing XDG_RUNTIME_DIR environment variable during connection.

```go
display, err := wl.Connect("")
if err == wl.ErrXdgRuntimeDirNotSet {
    fmt.Println("Wayland not available")
    os.Exit(1)
}
```

--------------------------------

### Register proxy

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/01-wl-core.md

Adds a proxy object to the context registry to enable event reception.

```go
newRegistry := wl.NewRegistry(ctx)
ctx.Register(newRegistry)
// newRegistry now has a unique ID and can receive events
```

--------------------------------

### Create a temporary file with FD_CLOEXEC

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/02-os-package.md

Creates a temporary file with the FD_CLOEXEC flag and unlinks it. The tmpdir should typically be retrieved from the XDG_RUNTIME_DIR environment variable.

```go
fd, err := os.CreateTmpfileCloexec(os.Getenv("XDG_RUNTIME_DIR"), "myapp-XXXXXX")
if err != nil && err != os.ErrUnlink {
    panic(err)
}
defer fd.Close()
```

--------------------------------

### Register Surface Configure Handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/07-xdg-shell.md

Methods and interfaces for handling surface configuration events.

```go
func (s *Surface) AddListener(h SurfaceConfigureHandler) {
    s.AddConfigureHandler(h)
}

func (s *Surface) AddConfigureHandler(h SurfaceConfigureHandler)
```

```go
type SurfaceConfigureHandler interface {
    HandleSurfaceConfigure(ev SurfaceConfigureEvent)
}
```

```go
type SurfaceConfigureEvent struct {
    Serial uint32  // Configuration serial, must be acked
}
```

```go
type MySurfaceHandler struct {
    surf *xdg.Surface
}

func (h *MySurfaceHandler) HandleSurfaceConfigure(ev xdg.SurfaceConfigureEvent) {
    h.surf.AckConfigure(ev.Serial)
}
```

--------------------------------

### Create Shared Memory Buffers

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/README.md

Allocate anonymous memory, map it, and attach it as a buffer to a surface.

```go
fd, _ := os.CreateAnonymousFile(size)
// mmap fd or wrap in byte slice
buffer := shm.CreateBuffer(fd, width, height, stride, format)
surface.Attach(buffer, 0, 0)
```

--------------------------------

### Prevent Decoration Creation

Source: https://github.com/neurlang/wayland/blob/master/doc/DECORATION_INTEGRATION.md

Comment out the decoration initialization logic within the window creation process.

```go
// In window.Create(), comment out:
// if Display.subcompositor != nil {
//     Window.decoration = NewWindowDecoration(Window)
// }
```

--------------------------------

### Bind Subcompositor Interface

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Binds the subcompositor interface from the registry.

```go
func RegistryBindSubcompositorInterface(r *wl.Registry, name, version uint32) *wl.Subcompositor
```

--------------------------------

### Integrate Cairo Surface with Window

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/03-window-package.md

Access the underlying surface of a window and cast it to the cairoshim.Surface interface to perform direct pixel manipulation.

```go
import "github.com/neurlang/wayland/cairoshim"

// Get surface for a window or popup
surf := window.GetSurface()  // Platform-specific method

// Cast to cairoshim.Surface interface
if cairoSurf, ok := surf.(cairoshim.Surface); ok {
    data := cairoSurf.ImageSurfaceGetData()
    width := cairoSurf.ImageSurfaceGetWidth()
    height := cairoSurf.ImageSurfaceGetHeight()
    // Render pixels directly to data buffer
}
```

--------------------------------

### Define ToplevelConfigureEvent and Handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Structure for XDG toplevel configuration events and the interface for handling them.

```go
type ToplevelConfigureEvent struct {
    Width int32       // Requested width (0 = client chooses)
    Height int32      // Requested height (0 = client chooses)
    States []uint32   // Window states array
}
```

```go
type ToplevelConfigureHandler interface {
    HandleToplevelConfigure(ev xdg.ToplevelConfigureEvent)
}
```

--------------------------------

### Handle XKB Compose Feed Results

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Defines result types for feeding keysyms to compose state and demonstrates checking for a match.

```go
type ComposeFeedResult uint8

const (
    ComposeResultNothing ComposeFeedResult = 0
    ComposeResultCancelled ComposeFeedResult = 1
    ComposeResultMatched ComposeFeedResult = 2
)
```

```go
result := composeState.Feed(keysym)
if result == xkbcommon.ComposeResultMatched {
    utf8 := composeState.GetUtf8()
}
```

--------------------------------

### Define KeyboardKeyEvent and Handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Structure for keyboard key events and the interface for handling them.

```go
type KeyboardKeyEvent struct {
    Serial uint32       // Request serial
    Time uint32        // Millisecond timestamp
    Key uint32         // Keycode (evdev code)
    State uint32       // 0 = released, 1 = pressed
}
```

```go
type KeyboardKeyHandler interface {
    HandleKeyboardKey(ev wl.KeyboardKeyEvent)
}
```

--------------------------------

### Define macOS Key Constants

Source: https://github.com/neurlang/wayland/blob/master/doc/DARWIN_KEYSYMS.md

Demonstrates that uppercase and lowercase letters share the same virtual key code on macOS.

```go
const KeyQ = 0x0C  // Same code
const KEYq = 0x0C  // Same code
```

--------------------------------

### Define SurfaceConfigureEvent and Handler

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/types.md

Structure for XDG surface configuration events and the interface for handling them.

```go
type SurfaceConfigureEvent struct {
    Serial uint32  // Configuration serial (must be acked)
}
```

```go
type SurfaceConfigureHandler interface {
    HandleSurfaceConfigure(ev xdg.SurfaceConfigureEvent)
}
```

--------------------------------

### Register Touch Listeners

Source: https://github.com/neurlang/wayland/blob/master/_autodocs/06-wlclient.md

Registers all touch handlers at once.

```go
func TouchAddListener(to *wl.Touch, tl TouchListener)
```