148 lines
3.8 KiB
Go
148 lines
3.8 KiB
Go
// Package bigreq is the X client API for the BIG-REQUESTS extension.
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package bigreq
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// This file is automatically generated from bigreq.xml. Edit at your peril!
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import (
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"github.com/BurntSushi/xgb"
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"github.com/BurntSushi/xgb/xproto"
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)
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// Init must be called before using the BIG-REQUESTS extension.
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func Init(c *xgb.Conn) error {
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reply, err := xproto.QueryExtension(c, 12, "BIG-REQUESTS").Reply()
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switch {
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case err != nil:
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return err
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case !reply.Present:
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return xgb.Errorf("No extension named BIG-REQUESTS could be found on on the server.")
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}
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xgb.ExtLock.Lock()
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c.Extensions["BIG-REQUESTS"] = reply.MajorOpcode
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for evNum, fun := range xgb.NewExtEventFuncs["BIG-REQUESTS"] {
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xgb.NewEventFuncs[int(reply.FirstEvent)+evNum] = fun
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}
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for errNum, fun := range xgb.NewExtErrorFuncs["BIG-REQUESTS"] {
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xgb.NewErrorFuncs[int(reply.FirstError)+errNum] = fun
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}
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xgb.ExtLock.Unlock()
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return nil
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}
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func init() {
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xgb.NewExtEventFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewEventFun)
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xgb.NewExtErrorFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewErrorFun)
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}
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// Skipping definition for base type 'Bool'
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// Skipping definition for base type 'Byte'
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// Skipping definition for base type 'Card8'
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// Skipping definition for base type 'Char'
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// Skipping definition for base type 'Void'
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// Skipping definition for base type 'Double'
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// Skipping definition for base type 'Float'
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// Skipping definition for base type 'Int16'
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// Skipping definition for base type 'Int32'
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// Skipping definition for base type 'Int8'
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// Skipping definition for base type 'Card16'
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// Skipping definition for base type 'Card32'
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// EnableCookie is a cookie used only for Enable requests.
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type EnableCookie struct {
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*xgb.Cookie
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}
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// Enable sends a checked request.
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// If an error occurs, it will be returned with the reply by calling EnableCookie.Reply()
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func Enable(c *xgb.Conn) EnableCookie {
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if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
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panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
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}
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cookie := c.NewCookie(true, true)
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c.NewRequest(enableRequest(c), cookie)
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return EnableCookie{cookie}
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}
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// EnableUnchecked sends an unchecked request.
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// If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
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func EnableUnchecked(c *xgb.Conn) EnableCookie {
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if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
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panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
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}
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cookie := c.NewCookie(false, true)
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c.NewRequest(enableRequest(c), cookie)
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return EnableCookie{cookie}
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}
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// EnableReply represents the data returned from a Enable request.
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type EnableReply struct {
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Sequence uint16 // sequence number of the request for this reply
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Length uint32 // number of bytes in this reply
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// padding: 1 bytes
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MaximumRequestLength uint32
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}
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// Reply blocks and returns the reply data for a Enable request.
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func (cook EnableCookie) Reply() (*EnableReply, error) {
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buf, err := cook.Cookie.Reply()
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if err != nil {
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return nil, err
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}
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if buf == nil {
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return nil, nil
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}
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return enableReply(buf), nil
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}
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// enableReply reads a byte slice into a EnableReply value.
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func enableReply(buf []byte) *EnableReply {
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v := new(EnableReply)
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b := 1 // skip reply determinant
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b += 1 // padding
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v.Sequence = xgb.Get16(buf[b:])
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b += 2
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v.Length = xgb.Get32(buf[b:]) // 4-byte units
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b += 4
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v.MaximumRequestLength = xgb.Get32(buf[b:])
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b += 4
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return v
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}
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// Write request to wire for Enable
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// enableRequest writes a Enable request to a byte slice.
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func enableRequest(c *xgb.Conn) []byte {
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size := 4
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b := 0
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buf := make([]byte, size)
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buf[b] = c.Extensions["BIG-REQUESTS"]
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b += 1
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buf[b] = 0 // request opcode
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b += 1
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xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
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b += 2
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return buf
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}
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