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// Package ge is the X client API for the Generic Event Extension extension.
package ge
// This file is automatically generated from ge.xml. Edit at your peril!
import (
xgb "janouch.name/haven/nexgb"
"janouch.name/haven/nexgb/xproto"
)
const (
MajorVersion = 1
MinorVersion = 0
)
// Init must be called before using the Generic Event Extension extension.
func Init(c *xgb.Conn) error {
reply, err := xproto.QueryExtension(c, 23, "Generic Event Extension").Reply()
switch {
case err != nil:
return err
case !reply.Present:
return xgb.Errorf("No extension named Generic Event Extension could be found on on the server.")
}
c.ExtLock.Lock()
c.Extensions["Generic Event Extension"] = reply.MajorOpcode
c.ExtLock.Unlock()
for evNum, fun := range xgb.NewExtEventFuncs["Generic Event Extension"] {
xgb.NewEventFuncs[int(reply.FirstEvent)+evNum] = fun
}
for errNum, fun := range xgb.NewExtErrorFuncs["Generic Event Extension"] {
xgb.NewErrorFuncs[int(reply.FirstError)+errNum] = fun
}
return nil
}
func init() {
xgb.NewExtEventFuncs["Generic Event Extension"] = make(map[int]xgb.NewEventFun)
xgb.NewExtErrorFuncs["Generic Event Extension"] = make(map[int]xgb.NewErrorFun)
}
// Skipping definition for base type 'Bool'
// Skipping definition for base type 'Byte'
// Skipping definition for base type 'Card8'
// Skipping definition for base type 'Char'
// Skipping definition for base type 'Void'
// Skipping definition for base type 'Double'
// Skipping definition for base type 'Float'
// Skipping definition for base type 'Int16'
// Skipping definition for base type 'Int32'
// Skipping definition for base type 'Int8'
// Skipping definition for base type 'Card16'
// Skipping definition for base type 'Card32'
// QueryVersionCookie is a cookie used only for QueryVersion requests.
type QueryVersionCookie struct {
*xgb.Cookie
}
// QueryVersion sends a checked request.
// If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply.
func QueryVersion(c *xgb.Conn, ClientMajorVersion, ClientMinorVersion uint16) QueryVersionCookie {
c.ExtLock.RLock()
defer c.ExtLock.RUnlock()
if _, ok := c.Extensions["Generic Event Extension"]; !ok {
panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Generic Event Extension'. ge.Init(connObj) must be called first.")
}
cookie := c.NewCookie(true, true)
c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
return QueryVersionCookie{cookie}
}
// QueryVersionUnchecked sends an unchecked request.
// If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion, ClientMinorVersion uint16) QueryVersionCookie {
c.ExtLock.RLock()
defer c.ExtLock.RUnlock()
if _, ok := c.Extensions["Generic Event Extension"]; !ok {
panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Generic Event Extension'. ge.Init(connObj) must be called first.")
}
cookie := c.NewCookie(false, true)
c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
return QueryVersionCookie{cookie}
}
// QueryVersionReply represents the data returned from a QueryVersion request.
type QueryVersionReply struct {
Sequence uint16 // sequence number of the request for this reply
Length uint32 // number of bytes in this reply
// padding: 1 bytes
MajorVersion uint16
MinorVersion uint16
// padding: 20 bytes
}
// Reply blocks and returns the reply data for a QueryVersion request.
func (cook QueryVersionCookie) Reply() (*QueryVersionReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return queryVersionReply(buf), nil
}
// queryVersionReply reads a byte slice into a QueryVersionReply value.
func queryVersionReply(buf []byte) *QueryVersionReply {
v := new(QueryVersionReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.MajorVersion = xgb.Get16(buf[b:])
b += 2
v.MinorVersion = xgb.Get16(buf[b:])
b += 2
b += 20 // padding
return v
}
// queryVersionRequest writes a QueryVersion request to a byte slice for transfer.
func queryVersionRequest(c *xgb.Conn, ClientMajorVersion, ClientMinorVersion uint16) []byte {
size := 8
b := 0
buf := make([]byte, size)
c.ExtLock.RLock()
buf[b] = c.Extensions["Generic Event Extension"]
c.ExtLock.RUnlock()
b += 1
buf[b] = 0 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
xgb.Put16(buf[b:], ClientMajorVersion)
b += 2
xgb.Put16(buf[b:], ClientMinorVersion)
b += 2
return buf
}
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