329 lines
8.0 KiB
Go
329 lines
8.0 KiB
Go
package x
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import "image"
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import "image/color"
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import "github.com/jezek/xgb/xproto"
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import "github.com/jezek/xgbutil/ewmh"
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import "github.com/jezek/xgbutil/icccm"
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import "github.com/jezek/xgbutil/xevent"
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import "github.com/jezek/xgbutil/xwindow"
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import "github.com/jezek/xgbutil/xgraphics"
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import "git.tebibyte.media/sashakoshka/tomo"
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type Window struct {
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backend *Backend
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xWindow *xwindow.Window
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xCanvas *xgraphics.Image
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child tomo.Element
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onClose func ()
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drawCallback func (region tomo.Image)
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minimumSizeChangeCallback func (width, height int)
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skipChildDrawCallback bool
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metrics struct {
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width int
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height int
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}
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}
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func (backend *Backend) NewWindow (
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width, height int,
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) (
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output tomo.Window,
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err error,
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) {
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if backend == nil { panic("nil backend") }
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window := &Window { backend: backend }
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window.xWindow, err = xwindow.Generate(backend.connection)
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if err != nil { return }
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window.xWindow.Create (
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backend.connection.RootWin(),
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0, 0, width, height, 0)
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err = window.xWindow.Listen (
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xproto.EventMaskStructureNotify,
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xproto.EventMaskPointerMotion,
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xproto.EventMaskKeyPress,
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xproto.EventMaskKeyRelease,
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xproto.EventMaskButtonPress,
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xproto.EventMaskButtonRelease)
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if err != nil { return }
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window.xWindow.WMGracefulClose (func (xWindow *xwindow.Window) {
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window.Close()
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})
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xevent.ConfigureNotifyFun(window.handleConfigureNotify).
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Connect(backend.connection, window.xWindow.Id)
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xevent.KeyPressFun(window.handleKeyPress).
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Connect(backend.connection, window.xWindow.Id)
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xevent.KeyReleaseFun(window.handleKeyRelease).
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Connect(backend.connection, window.xWindow.Id)
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xevent.ButtonPressFun(window.handleButtonPress).
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Connect(backend.connection, window.xWindow.Id)
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xevent.ButtonReleaseFun(window.handleButtonRelease).
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Connect(backend.connection, window.xWindow.Id)
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xevent.MotionNotifyFun(window.handleMotionNotify).
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Connect(backend.connection, window.xWindow.Id)
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window.metrics.width = width
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window.metrics.height = height
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window.childMinimumSizeChangeCallback(8, 8)
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window.reallocateCanvas()
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backend.windows[window.xWindow.Id] = window
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output = window
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return
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}
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func (window *Window) ColorModel () (model color.Model) {
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return color.RGBAModel
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}
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func (window *Window) At (x, y int) (pixel color.Color) {
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pixel = window.xCanvas.At(x, y)
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return
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}
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func (window *Window) RGBAAt (x, y int) (pixel color.RGBA) {
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sourcePixel := window.xCanvas.At(x, y).(xgraphics.BGRA)
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pixel = color.RGBA {
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R: sourcePixel.R,
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G: sourcePixel.G,
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B: sourcePixel.B,
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A: sourcePixel.A,
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}
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return
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}
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func (window *Window) Bounds () (bounds image.Rectangle) {
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bounds.Max = image.Point {
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X: window.metrics.width,
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Y: window.metrics.height,
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}
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return
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}
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func (window *Window) Handle (event tomo.Event) () {
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switch event.(type) {
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case tomo.EventResize:
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resizeEvent := event.(tomo.EventResize)
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// we will receive a resize event from X later which will be
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// handled by our event handler callbacks.
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if resizeEvent.Width < window.MinimumWidth() {
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resizeEvent.Width = window.MinimumWidth()
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}
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if resizeEvent.Height < window.MinimumHeight() {
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resizeEvent.Height = window.MinimumHeight()
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}
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window.xWindow.Resize(resizeEvent.Width, resizeEvent.Height)
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default:
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if window.child != nil { window.child.Handle(event) }
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}
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return
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}
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func (window *Window) SetDrawCallback (draw func (region tomo.Image)) {
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window.drawCallback = draw
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}
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func (window *Window) SetMinimumSizeChangeCallback (
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notify func (width, height int),
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) {
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window.minimumSizeChangeCallback = notify
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}
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func (window *Window) Selectable () (selectable bool) {
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if window.child != nil { selectable = window.child.Selectable() }
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return
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}
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func (window *Window) MinimumWidth () (minimum int) {
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if window.child != nil { minimum = window.child.MinimumWidth() }
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minimum = 8
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return
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}
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func (window *Window) MinimumHeight () (minimum int) {
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if window.child != nil { minimum = window.child.MinimumHeight() }
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minimum = 8
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return
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}
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func (window *Window) Adopt (child tomo.Element) {
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if window.child != nil {
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window.child.SetDrawCallback(nil)
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window.child.SetMinimumSizeChangeCallback(nil)
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}
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window.child = child
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if child != nil {
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child.SetDrawCallback(window.childDrawCallback)
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child.SetMinimumSizeChangeCallback (
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window.childMinimumSizeChangeCallback)
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window.resizeChildToFit()
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}
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window.childMinimumSizeChangeCallback (
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child.MinimumWidth(),
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child.MinimumHeight())
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}
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func (window *Window) Child () (child tomo.Element) {
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child = window.child
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return
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}
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func (window *Window) SetTitle (title string) {
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ewmh.WmNameSet (
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window.backend.connection,
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window.xWindow.Id,
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title)
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}
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func (window *Window) SetIcon (sizes []image.Image) {
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wmIcons := []ewmh.WmIcon { }
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for _, icon := range sizes {
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width := icon.Bounds().Max.X
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height := icon.Bounds().Max.Y
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wmIcon := ewmh.WmIcon {
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Width: uint(width),
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Height: uint(height),
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Data: make ([]uint, width * height),
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}
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// manually convert image data beacuse of course we have to do
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// this
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index := 0
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for y := 0; y < height; y ++ {
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for x := 0; x < width; x ++ {
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r, g, b, a := icon.At(x, y).RGBA()
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r >>= 8
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g >>= 8
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b >>= 8
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a >>= 8
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wmIcon.Data[index] =
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(uint(a) << 24) |
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(uint(r) << 16) |
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(uint(g) << 8) |
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(uint(b) << 0)
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index ++
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}}
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wmIcons = append(wmIcons, wmIcon)
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}
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ewmh.WmIconSet (
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window.backend.connection,
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window.xWindow.Id,
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wmIcons)
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}
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func (window *Window) Show () {
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if window.child == nil {
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window.xCanvas.For (func (x, y int) xgraphics.BGRA {
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return xgraphics.BGRA { }
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})
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window.pushRegion(window.xCanvas.Bounds())
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}
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window.xWindow.Map()
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}
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func (window *Window) Hide () {
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window.xWindow.Unmap()
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}
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func (window *Window) Close () {
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delete(window.backend.windows, window.xWindow.Id)
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if window.onClose != nil { window.onClose() }
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xevent.Detach(window.xWindow.X, window.xWindow.Id)
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window.xWindow.Destroy()
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}
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func (window *Window) OnClose (callback func ()) {
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window.onClose = callback
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}
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func (window *Window) reallocateCanvas () {
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if window.xCanvas != nil {
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window.xCanvas.Destroy()
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}
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window.xCanvas = xgraphics.New (
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window.backend.connection,
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image.Rect (
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0, 0,
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window.metrics.width,
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window.metrics.height))
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window.xCanvas.XSurfaceSet(window.xWindow.Id)
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}
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func (window *Window) redrawChildEntirely () {
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window.xCanvas.For (func (x, y int) (c xgraphics.BGRA) {
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rgba := window.child.RGBAAt(x, y)
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c.R, c.G, c.B, c.A = rgba.R, rgba.G, rgba.B, rgba.A
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return
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})
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window.pushRegion(window.xCanvas.Bounds())
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}
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func (window *Window) resizeChildToFit () {
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window.skipChildDrawCallback = true
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window.child.Handle(tomo.EventResize {
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Width: window.metrics.width,
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Height: window.metrics.height,
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})
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window.skipChildDrawCallback = false
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window.redrawChildEntirely()
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}
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func (window *Window) childDrawCallback (region tomo.Image) {
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if window.skipChildDrawCallback { return }
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bounds := region.Bounds()
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for x := bounds.Min.X; x < bounds.Max.X; x ++ {
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for y := bounds.Min.Y; y < bounds.Max.Y; y ++ {
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rgba := region.RGBAAt(x, y)
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window.xCanvas.SetBGRA (x, y, xgraphics.BGRA {
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R: rgba.R,
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G: rgba.G,
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B: rgba.B,
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A: rgba.A,
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})
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}}
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window.pushRegion(region.Bounds())
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}
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func (window *Window) childMinimumSizeChangeCallback (width, height int) {
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icccm.WmNormalHintsSet (
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window.backend.connection,
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window.xWindow.Id,
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&icccm.NormalHints {
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Flags: icccm.SizeHintPMinSize,
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MinWidth: uint(width),
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MinHeight: uint(height),
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})
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newWidth := window.metrics.width
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newHeight := window.metrics.height
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if newWidth < width { newWidth = width }
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if newHeight < height { newHeight = height }
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if newWidth != window.metrics.width ||
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newHeight != window.metrics.height {
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window.xWindow.Resize(newWidth, newHeight)
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}
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}
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func (window *Window) pushRegion (region image.Rectangle) {
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if window.xCanvas == nil { panic("whoopsie!!!!!!!!!!!!!!") }
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image, ok := window.xCanvas.SubImage(region).(*xgraphics.Image)
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if ok {
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image.XDraw()
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window.xCanvas.XPaint(window.xWindow.Id)
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}
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}
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