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package main
import (
"fmt"
)
// Event types
func (e *Event) Define(c *Context) {
c.Putln("// %s is the event number for a %s.", e.SrcName(), e.EvType())
c.Putln("const %s = %d", e.SrcName(), e.Number)
c.Putln("")
c.Putln("type %s struct {", e.EvType())
if !e.NoSequence {
c.Putln("Sequence uint16")
}
for _, field := range e.Fields {
field.Define(c)
}
c.Putln("}")
c.Putln("")
// Read defines a function that transforms a byte slice into this
// event struct.
e.Read(c)
// Write defines a function that transforms this event struct into
// a byte slice.
e.Write(c)
// Makes sure that this event type is an Event interface.
c.Putln("// SequenceId returns the sequence id attached to the %s event.",
e.SrcName())
c.Putln("// Events without a sequence number (KeymapNotify) return 0.")
c.Putln("// This is mostly used internally.")
c.Putln("func (v %s) SequenceId() uint16 {", e.EvType())
if e.NoSequence {
c.Putln("return uint16(0)")
} else {
c.Putln("return v.Sequence")
}
c.Putln("}")
c.Putln("")
c.Putln("// String is a rudimentary string representation of %s.",
e.EvType())
c.Putln("func (v %s) String() string {", e.EvType())
EventFieldString(c, e.Fields, e.SrcName())
c.Putln("}")
c.Putln("")
// Let's the XGB event loop read this event.
c.Putln("func init() {")
if c.protocol.isExt() {
c.Putln("xgb.NewExtEventFuncs[\"%s\"][%d] = %sNew",
c.protocol.ExtXName, e.Number, e.EvType())
} else {
c.Putln("xgb.NewEventFuncs[%d] = %sNew", e.Number, e.EvType())
}
c.Putln("}")
c.Putln("")
}
func (e *Event) Read(c *Context) {
c.Putln("// %sNew constructs a %s value that implements xgb.Event from "+
"a byte slice.", e.EvType(), e.EvType())
c.Putln("func %sNew(buf []byte) xgb.Event {", e.EvType())
c.Putln("v := %s{}", e.EvType())
c.Putln("b := 1 // don't read event number")
c.Putln("")
for i, field := range e.Fields {
if i == 1 && !e.NoSequence {
c.Putln("v.Sequence = xgb.Get16(buf[b:])")
c.Putln("b += 2")
c.Putln("")
}
field.Read(c, "v.")
c.Putln("")
}
c.Putln("return v")
c.Putln("}")
c.Putln("")
}
func (e *Event) Write(c *Context) {
c.Putln("// Bytes writes a %s value to a byte slice.", e.EvType())
c.Putln("func (v %s) Bytes() []byte {", e.EvType())
c.Putln("buf := make([]byte, %s)", e.Size())
c.Putln("b := 0")
c.Putln("")
c.Putln("// write event number")
c.Putln("buf[b] = %d", e.Number)
c.Putln("b += 1")
c.Putln("")
for i, field := range e.Fields {
if i == 1 && !e.NoSequence {
c.Putln("b += 2 // skip sequence number")
c.Putln("")
}
field.Write(c, "v.")
c.Putln("")
}
c.Putln("return buf")
c.Putln("}")
c.Putln("")
}
// EventCopy types
func (e *EventCopy) Define(c *Context) {
c.Putln("// %s is the event number for a %s.", e.SrcName(), e.EvType())
c.Putln("const %s = %d", e.SrcName(), e.Number)
c.Putln("")
c.Putln("type %s %s", e.EvType(), e.Old.(*Event).EvType())
c.Putln("")
// Read defines a function that transforms a byte slice into this
// event struct.
e.Read(c)
// Write defines a function that transoforms this event struct into
// a byte slice.
e.Write(c)
// Makes sure that this event type is an Event interface.
c.Putln("// SequenceId returns the sequence id attached to the %s event.",
e.SrcName())
c.Putln("// Events without a sequence number (KeymapNotify) return 0.")
c.Putln("// This is mostly used internally.")
c.Putln("func (v %s) SequenceId() uint16 {", e.EvType())
if e.Old.(*Event).NoSequence {
c.Putln("return uint16(0)")
} else {
c.Putln("return v.Sequence")
}
c.Putln("}")
c.Putln("")
c.Putln("func (v %s) String() string {", e.EvType())
EventFieldString(c, e.Old.(*Event).Fields, e.SrcName())
c.Putln("}")
c.Putln("")
// Let's the XGB event loop read this event.
c.Putln("func init() {")
if c.protocol.isExt() {
c.Putln("xgb.NewExtEventFuncs[\"%s\"][%d] = %sNew",
c.protocol.ExtXName, e.Number, e.EvType())
} else {
c.Putln("xgb.NewEventFuncs[%d] = %sNew", e.Number, e.EvType())
}
c.Putln("}")
c.Putln("")
}
func (e *EventCopy) Read(c *Context) {
c.Putln("// %sNew constructs a %s value that implements xgb.Event from "+
"a byte slice.", e.EvType(), e.EvType())
c.Putln("func %sNew(buf []byte) xgb.Event {", e.EvType())
c.Putln("return %s(%sNew(buf).(%s))",
e.EvType(), e.Old.(*Event).EvType(), e.Old.(*Event).EvType())
c.Putln("}")
c.Putln("")
}
func (e *EventCopy) Write(c *Context) {
c.Putln("// Bytes writes a %s value to a byte slice.", e.EvType())
c.Putln("func (v %s) Bytes() []byte {", e.EvType())
c.Putln("return %s(v).Bytes()", e.Old.(*Event).EvType())
c.Putln("}")
c.Putln("")
}
// EventFieldString works for both Event and EventCopy. It assembles all of the
// fields in an event and formats them into a single string.
func EventFieldString(c *Context, fields []Field, evName string) {
c.Putln("fieldVals := make([]string, 0, %d)", len(fields))
if evName != "KeymapNotify" {
c.Putln("fieldVals = append(fieldVals, "+
"xgb.Sprintf(\"Sequence: %s\", v.Sequence))", "%d")
}
for _, field := range fields {
switch f := field.(type) {
case *PadField:
continue
case *SingleField:
switch f.Type.(type) {
case *Base:
case *Resource:
case *TypeDef:
default:
continue
}
switch field.SrcType() {
case "string":
format := fmt.Sprintf("xgb.Sprintf(\"%s: %s\", v.%s)",
field.SrcName(), "%s", field.SrcName())
c.Putln("fieldVals = append(fieldVals, %s)", format)
case "bool":
format := fmt.Sprintf("xgb.Sprintf(\"%s: %s\", v.%s)",
field.SrcName(), "%t", field.SrcName())
c.Putln("fieldVals = append(fieldVals, %s)", format)
default:
format := fmt.Sprintf("xgb.Sprintf(\"%s: %s\", v.%s)",
field.SrcName(), "%d", field.SrcName())
c.Putln("fieldVals = append(fieldVals, %s)", format)
}
}
}
c.Putln("return \"%s {\" + xgb.StringsJoin(fieldVals, \", \") + \"}\"",
evName)
}
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