package x import "image" import "github.com/jezek/xgb/xproto" import "github.com/jezek/xgbutil/ewmh" import "github.com/jezek/xgbutil/icccm" import "github.com/jezek/xgbutil/xevent" import "github.com/jezek/xgbutil/xwindow" import "github.com/jezek/xgbutil/xgraphics" import "git.tebibyte.media/sashakoshka/tomo" type Window struct { backend *Backend xWindow *xwindow.Window xCanvas *xgraphics.Image child tomo.Element onClose func () skipChildDrawCallback bool metrics struct { width int height int } } func (backend *Backend) NewWindow ( width, height int, ) ( output tomo.Window, err error, ) { if backend == nil { panic("nil backend") } window := &Window { backend: backend } window.xWindow, err = xwindow.Generate(backend.connection) if err != nil { return } window.xWindow.Create ( backend.connection.RootWin(), 0, 0, width, height, 0) err = window.xWindow.Listen ( xproto.EventMaskStructureNotify, xproto.EventMaskPointerMotion, xproto.EventMaskKeyPress, xproto.EventMaskKeyRelease, xproto.EventMaskButtonPress, xproto.EventMaskButtonRelease) if err != nil { return } window.xWindow.WMGracefulClose (func (xWindow *xwindow.Window) { window.Close() }) xevent.ConfigureNotifyFun(window.handleConfigureNotify). Connect(backend.connection, window.xWindow.Id) xevent.KeyPressFun(window.handleKeyPress). Connect(backend.connection, window.xWindow.Id) xevent.KeyReleaseFun(window.handleKeyRelease). Connect(backend.connection, window.xWindow.Id) xevent.ButtonPressFun(window.handleButtonPress). Connect(backend.connection, window.xWindow.Id) xevent.ButtonReleaseFun(window.handleButtonRelease). Connect(backend.connection, window.xWindow.Id) xevent.MotionNotifyFun(window.handleMotionNotify). Connect(backend.connection, window.xWindow.Id) window.metrics.width = width window.metrics.height = height window.childMinimumSizeChangeCallback(8, 8) window.reallocateCanvas() backend.windows[window.xWindow.Id] = window output = window return } func (window *Window) Adopt (child tomo.Element) { if window.child != nil { child.SetParentHooks (tomo.ParentHooks { }) if child.Selectable() { child.Handle(tomo.EventDeselect { }) } } window.child = child if child != nil { child.SetParentHooks (tomo.ParentHooks { Draw: window.childDrawCallback, MinimumSizeChange: window.childMinimumSizeChangeCallback, SelectionRequest: window.childSelectionRequestCallback, }) // TODO: it is possible for an element to start out as // selectable, and then become unselectable. it should be // standard behavior for containers (including windows) to, if // no children are selected, select the first child on ctrl-tab // press. we should therefore be able to ask any element if it // is selected. if child.Selectable() { child.Handle(tomo.EventSelect { }) } window.resizeChildToFit() } window.childMinimumSizeChangeCallback(child.MinimumSize()) } func (window *Window) Child () (child tomo.Element) { child = window.child return } func (window *Window) SetTitle (title string) { ewmh.WmNameSet ( window.backend.connection, window.xWindow.Id, title) } func (window *Window) SetIcon (sizes []image.Image) { wmIcons := []ewmh.WmIcon { } for _, icon := range sizes { width := icon.Bounds().Max.X height := icon.Bounds().Max.Y wmIcon := ewmh.WmIcon { Width: uint(width), Height: uint(height), Data: make ([]uint, width * height), } // manually convert image data beacuse of course we have to do // this index := 0 for y := 0; y < height; y ++ { for x := 0; x < width; x ++ { r, g, b, a := icon.At(x, y).RGBA() r >>= 8 g >>= 8 b >>= 8 a >>= 8 wmIcon.Data[index] = (uint(a) << 24) | (uint(r) << 16) | (uint(g) << 8) | (uint(b) << 0) index ++ }} wmIcons = append(wmIcons, wmIcon) } ewmh.WmIconSet ( window.backend.connection, window.xWindow.Id, wmIcons) } func (window *Window) Show () { if window.child == nil { window.xCanvas.For (func (x, y int) xgraphics.BGRA { return xgraphics.BGRA { } }) window.pushRegion(window.xCanvas.Bounds()) } window.xWindow.Map() } func (window *Window) Hide () { window.xWindow.Unmap() } func (window *Window) Close () { delete(window.backend.windows, window.xWindow.Id) if window.onClose != nil { window.onClose() } xevent.Detach(window.xWindow.X, window.xWindow.Id) window.xWindow.Destroy() } func (window *Window) OnClose (callback func ()) { window.onClose = callback } func (window *Window) reallocateCanvas () { if window.xCanvas != nil { window.xCanvas.Destroy() } window.xCanvas = xgraphics.New ( window.backend.connection, image.Rect ( 0, 0, window.metrics.width, window.metrics.height)) window.xCanvas.XSurfaceSet(window.xWindow.Id) } func (window *Window) redrawChildEntirely () { window.xCanvas.For (func (x, y int) (c xgraphics.BGRA) { rgba := window.child.RGBAAt(x, y) c.R, c.G, c.B, c.A = rgba.R, rgba.G, rgba.B, rgba.A return }) window.pushRegion(window.xCanvas.Bounds()) } func (window *Window) resizeChildToFit () { window.skipChildDrawCallback = true window.child.Handle(tomo.EventResize { Width: window.metrics.width, Height: window.metrics.height, }) window.skipChildDrawCallback = false window.redrawChildEntirely() } func (window *Window) childDrawCallback (region tomo.Image) { if window.skipChildDrawCallback { return } bounds := region.Bounds() for x := bounds.Min.X; x < bounds.Max.X; x ++ { for y := bounds.Min.Y; y < bounds.Max.Y; y ++ { rgba := region.RGBAAt(x, y) window.xCanvas.SetBGRA (x, y, xgraphics.BGRA { R: rgba.R, G: rgba.G, B: rgba.B, A: rgba.A, }) }} window.pushRegion(region.Bounds()) } func (window *Window) childMinimumSizeChangeCallback (width, height int) { icccm.WmNormalHintsSet ( window.backend.connection, window.xWindow.Id, &icccm.NormalHints { Flags: icccm.SizeHintPMinSize, MinWidth: uint(width), MinHeight: uint(height), }) newWidth := window.metrics.width newHeight := window.metrics.height if newWidth < width { newWidth = width } if newHeight < height { newHeight = height } if newWidth != window.metrics.width || newHeight != window.metrics.height { window.xWindow.Resize(newWidth, newHeight) } } func (window *Window) childSelectionRequestCallback () { window.child.Handle(tomo.EventSelect { }) } func (window *Window) pushRegion (region image.Rectangle) { if window.xCanvas == nil { panic("whoopsie!!!!!!!!!!!!!!") } image, ok := window.xCanvas.SubImage(region).(*xgraphics.Image) if ok { image.XDraw() window.xCanvas.XPaint(window.xWindow.Id) } }