blob: 813e17b8f514ecae045f7ebce20a607824e3b210 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "txExpr.h"
#include "nsIAtom.h"
#include "txNodeSet.h"
#include "nsGkAtoms.h"
#include "txIXPathContext.h"
//-------------------/
//- VariableRefExpr -/
//-------------------/
/**
* Creates a VariableRefExpr with the given variable name
**/
VariableRefExpr::VariableRefExpr(nsIAtom* aPrefix, nsIAtom* aLocalName,
int32_t aNSID)
: mPrefix(aPrefix), mLocalName(aLocalName), mNamespace(aNSID)
{
NS_ASSERTION(mLocalName, "VariableRefExpr without local name?");
if (mPrefix == nsGkAtoms::_empty)
mPrefix = nullptr;
}
/**
* Evaluates this Expr based on the given context node and processor state
* @param context the context node for evaluation of this Expr
* @param ps the ContextState containing the stack information needed
* for evaluation
* @return the result of the evaluation
**/
nsresult
VariableRefExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
{
nsresult rv = aContext->getVariable(mNamespace, mLocalName, *aResult);
if (NS_FAILED(rv)) {
// XXX report error, undefined variable
return rv;
}
return NS_OK;
}
TX_IMPL_EXPR_STUBS_0(VariableRefExpr, ANY_RESULT)
bool
VariableRefExpr::isSensitiveTo(ContextSensitivity aContext)
{
return !!(aContext & VARIABLES_CONTEXT);
}
#ifdef TX_TO_STRING
void
VariableRefExpr::toString(nsAString& aDest)
{
aDest.Append(char16_t('$'));
if (mPrefix) {
nsAutoString prefix;
mPrefix->ToString(prefix);
aDest.Append(prefix);
aDest.Append(char16_t(':'));
}
nsAutoString lname;
mLocalName->ToString(lname);
aDest.Append(lname);
}
#endif
|
