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package main
import (
"bytes"
"encoding/xml"
"fmt"
"log"
"strings"
)
type Context struct {
xml *XML
out *bytes.Buffer
}
func newContext() *Context {
return &Context{
xml: &XML{},
out: bytes.NewBuffer([]byte{}),
}
}
// Putln calls put and adds a new line to the end of 'format'.
func (c *Context) Putln(format string, v ...interface{}) {
c.Put(format + "\n", v...)
}
// Put is a short alias to write to 'out'.
func (c *Context) Put(format string, v ...interface{}) {
_, err := c.out.WriteString(fmt.Sprintf(format, v...))
if err != nil {
log.Fatalf("There was an error writing to context buffer: %s", err)
}
}
// TypePrefix searches the parsed XML for a type matching 'needle'.
// It then returns the appropriate prefix to be used in source code.
// Note that the core X protocol *is* a namespace, but does not have a prefix.
// Also note that you should probably check the BaseTypeMap and TypeMap
// before calling this function.
func (c *Context) TypePrefix(needle Type) string {
// If this is xproto, quit. No prefixes needed.
if c.xml.Header == "xproto" {
return ""
}
// First check for the type in the current namespace.
if c.xml.HasType(needle) {
return strings.Title(c.xml.Header)
}
// Now check each of the imports...
for _, imp := range c.xml.Imports {
if imp.xml.Header != "xproto" && imp.xml.HasType(needle) {
return strings.Title(imp.xml.Header)
}
}
return ""
}
// Translate is the big daddy of them all. It takes in an XML byte slice
// and writes Go code to the 'out' buffer.
func (c *Context) Translate(xmlBytes []byte) {
err := xml.Unmarshal(xmlBytes, c.xml)
if err != nil {
log.Fatal(err)
}
// Parse all imports
c.xml.Imports.Eval()
// Make sure all top level enumerations have expressions
// (For when there are empty items.)
c.xml.Enums.Eval()
// It's Morphin' Time!
c.xml.Morph(c)
// for _, req := range c.xml.Requests {
// if req.Name != "CreateContext" && req.Name != "MakeCurrent" {
// continue
// }
// log.Println(req.Name)
// for _, field := range req.Fields {
// log.Println("\t", field.XMLName.Local, field.Type.Morph(c))
// }
// }
}
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