142 lines
3.1 KiB
Go
142 lines
3.1 KiB
Go
package x
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import "image"
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import "errors"
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/xgbkb"
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import "git.tebibyte.media/tomo/tomo/canvas"
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import "git.tebibyte.media/tomo/backend/x/canvas"
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import "git.tebibyte.media/tomo/backend/internal/system"
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import "github.com/jezek/xgbutil"
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import "github.com/jezek/xgb/xproto"
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import "github.com/jezek/xgbutil/xevent"
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import "github.com/jezek/xgbutil/keybind"
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import "github.com/jezek/xgbutil/mousebind"
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type Backend struct {
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x *xgbutil.XUtil
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system *system.System
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doChannel chan func()
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windows map[xproto.Window] *window
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open bool
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}
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type backendLink struct {
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backend *Backend
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}
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func (this *backendLink) NewTexture (source image.Image) canvas.TextureCloser {
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return this.backend.NewTexture(source)
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}
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func (this *backendLink) NewCanvas (bounds image.Rectangle) canvas.Canvas {
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return this.backend.NewCanvas(bounds)
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}
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func (this *backendLink) NewSurface (bounds image.Rectangle) (system.SurfaceLink, error) {
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// TODO
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return nil, errors.New("x: not implemented")
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}
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func New () (tomo.Backend, error) {
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backend := &Backend {
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doChannel: make(chan func (), 32),
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windows: make(map[xproto.Window] *window),
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open: true,
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}
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link := &backendLink {
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backend: backend,
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}
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backend.system = system.New(link)
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var err error
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backend.x, err = xgbutil.NewConn()
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if err != nil { return nil, err }
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keybind .Initialize(backend.x)
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xgbkb .Initialize(backend.x)
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mousebind.Initialize(backend.x)
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return backend, nil
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}
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func (this *Backend) Run () error {
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this.assert()
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pingBefore,
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pingAfter,
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pingQuit := xevent.MainPing(this.x)
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for {
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select {
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case <- pingBefore:
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<- pingAfter
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case callback := <- this.doChannel:
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callback()
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case <- pingQuit:
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return nil // FIXME: if we exited due to an error say so
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}
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this.afterEvent()
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}
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}
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func (this *Backend) Stop () {
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this.assert()
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if !this.open { return }
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this.open = false
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toClose := []*window { }
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for _, panel := range this.windows {
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toClose = append(toClose, panel)
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}
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for _, panel := range toClose {
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panel.Close()
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}
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xevent.Quit(this.x)
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this.x.Conn().Close()
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}
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func (this *Backend) Do (callback func ()) {
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this.assert()
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this.doChannel <- callback
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}
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func (this *Backend) NewBox () tomo.Box {
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return this.system.NewBox()
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}
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func (this *Backend) NewCanvasBox () tomo.CanvasBox {
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return this.system.NewCanvasBox()
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}
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func (this *Backend) NewContainerBox () tomo.ContainerBox {
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return this.system.NewContainerBox()
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}
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func (this *Backend) NewSurfaceBox () (tomo.SurfaceBox, error) {
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return this.system.NewSurfaceBox()
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}
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func (this *Backend) NewTextBox () tomo.TextBox {
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return this.system.NewTextBox()
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}
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func (this *Backend) NewTexture (source image.Image) canvas.TextureCloser {
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return xcanvas.NewTextureFrom(source)
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}
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func (this *Backend) NewCanvas (bounds image.Rectangle) canvas.Canvas {
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return xcanvas.NewCanvas(this.x, bounds)
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}
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func (this *Backend) assert () {
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if this == nil { panic("x: nil backend") }
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}
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func (this *Backend) afterEvent () {
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for _, window := range this.windows {
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window.hierarchy.AfterEvent()
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}
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}
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