139 lines
3.4 KiB
Go
139 lines
3.4 KiB
Go
package x
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import "image"
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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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func (window *window) handleExpose (
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connection *xgbutil.XUtil,
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event xevent.ExposeEvent,
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) {
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if window.xCanvas == nil {
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window.reallocateCanvas()
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}
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window.compressExpose(*event.ExposeEvent)
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window.pushAll()
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}
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func (window *window) updateBounds () {
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// FIXME: some window managers parent windows more than once, we might
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// need to sum up all their positions.
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decorGeometry, _ := window.xWindow.DecorGeometry()
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windowGeometry, _ := window.xWindow.Geometry()
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origin := image.Pt(
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windowGeometry.X() + decorGeometry.X(),
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windowGeometry.Y() + decorGeometry.Y())
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window.metrics.bounds = image.Rectangle {
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Min: origin,
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Max: origin.Add(image.Pt(windowGeometry.Width(), windowGeometry.Height())),
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}
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}
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func (window *window) handleConfigureNotify (
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connection *xgbutil.XUtil,
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event xevent.ConfigureNotifyEvent,
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) {
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if window.root == nil { return }
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configureEvent := *event.ConfigureNotifyEvent
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newWidth := int(configureEvent.Width)
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newHeight := int(configureEvent.Height)
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sizeChanged :=
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window.metrics.bounds.Dx() != newWidth ||
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window.metrics.bounds.Dy() != newHeight
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window.updateBounds()
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if sizeChanged {
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configureEvent = window.compressConfigureNotify(configureEvent)
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window.reallocateCanvas()
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// TODO figure out what to do with this
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// if !window.exposeEventFollows(configureEvent) {
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// }
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}
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}
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func (window *window) exposeEventFollows (event xproto.ConfigureNotifyEvent) (found bool) {
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nextEvents := xevent.Peek(window.backend.x)
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if len(nextEvents) > 0 {
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untypedEvent := nextEvents[0]
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if untypedEvent.Err == nil {
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typedEvent, ok :=
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untypedEvent.Event.(xproto.ConfigureNotifyEvent)
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if ok && typedEvent.Window == event.Window {
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return true
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}
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}
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}
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return false
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}
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func (window *window) compressExpose (
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firstEvent xproto.ExposeEvent,
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) (
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lastEvent xproto.ExposeEvent,
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region image.Rectangle,
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) {
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region = image.Rect (
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int(firstEvent.X), int(firstEvent.Y),
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int(firstEvent.X + firstEvent.Width),
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int(firstEvent.Y + firstEvent.Height))
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window.backend.x.Sync()
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xevent.Read(window.backend.x, false)
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lastEvent = firstEvent
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for index, untypedEvent := range xevent.Peek(window.backend.x) {
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if untypedEvent.Err != nil { continue }
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typedEvent, ok := untypedEvent.Event.(xproto.ExposeEvent)
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if !ok { continue }
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if firstEvent.Window == typedEvent.Window {
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region = region.Union (image.Rect (
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int(typedEvent.X), int(typedEvent.Y),
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int(typedEvent.X + typedEvent.Width),
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int(typedEvent.Y + typedEvent.Height)))
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lastEvent = typedEvent
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defer func (index int) {
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xevent.DequeueAt(window.backend.x, index)
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} (index)
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}
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}
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return
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}
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func (window *window) compressConfigureNotify (
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firstEvent xproto.ConfigureNotifyEvent,
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) (
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lastEvent xproto.ConfigureNotifyEvent,
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) {
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window.backend.x.Sync()
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xevent.Read(window.backend.x, false)
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lastEvent = firstEvent
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for index, untypedEvent := range xevent.Peek(window.backend.x) {
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if untypedEvent.Err != nil { continue }
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typedEvent, ok := untypedEvent.Event.(xproto.ConfigureNotifyEvent)
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if !ok { continue }
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if firstEvent.Event == typedEvent.Event &&
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firstEvent.Window == typedEvent.Window {
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lastEvent = typedEvent
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defer func (index int) {
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xevent.DequeueAt(window.backend.x, index)
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} (index)
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}
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}
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return
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}
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