xpathdebug.js

来自「ajax patterns 这是关于ajax设计模式方面的原代码」· JavaScript 代码 · 共 235 行

// Copyright 2005 Google Inc.
// All Rights Reserved
//
// Debug stuff for the XPath parser. Also used by XSLT.

TokenExpr.prototype.toString = function() {
  return this.value;
}

TokenExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[token] ' + this.value + '\n';
  return ret;
}

LocationExpr.prototype.toString = function() {
  var ret = '';
  if (this.absolute) {
    ret += '/';
  }
  for (var i = 0; i < this.steps.length; ++i) {
    if (i > 0) {
      ret += '/';
    }
    ret += this.steps[i].toString();
  }
  return ret;
}

LocationExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[location] ' + 
  (this.absolute ? 'absolute' : 'relative') + '\n';
  for (var i = 0; i < this.steps.length; ++i) {
    ret += this.steps[i].parseTree(indent + ' ');
  }  
  return ret;
}

StepExpr.prototype.toString = function() {
  var ret = this.axis + '::' + this.nodetest.toString();
  for (var i = 0; i < this.predicate.length; ++i) {
    ret += this.predicate[i].toString();
  }
  return ret;
}

StepExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[step]\n' + 
  indent + ' [axis] ' + this.axis + '\n' + 
  this.nodetest.parseTree(indent + ' ');
  for (var i = 0; i < this.predicate.length; ++i) {
    ret += this.predicate[i].parseTree(indent + ' ');
  }  
  return ret;
}

NodeTestAny.prototype.toString = function() {
  return 'node()';
}

NodeTestAny.prototype.parseTree = function(indent) {
  return indent + '[nodetest] ' + this.toString() + '\n';
}

NodeTestElement.prototype.toString = function() {
  return '*';
}

NodeTestElement.prototype.parseTree = NodeTestAny.prototype.parseTree;

NodeTestText.prototype.toString = function() {
  return 'text()';
}

NodeTestText.prototype.parseTree = NodeTestAny.prototype.parseTree;

NodeTestComment.prototype.toString = function() {
  return 'comment()';
}

NodeTestComment.prototype.parseTree = NodeTestAny.prototype.parseTree;

NodeTestPI.prototype.toString = function() {
  return 'processing-instruction()';
}

NodeTestPI.prototype.parseTree = NodeTestAny.prototype.parseTree;

NodeTestNC.prototype.toString = function() {
  return this.nsprefix + ':*';
}

NodeTestNC.prototype.parseTree = NodeTestAny.prototype.parseTree;

NodeTestName.prototype.toString = function() {
  return this.name;
}

NodeTestName.prototype.parseTree = NodeTestAny.prototype.parseTree;

PredicateExpr.prototype.toString = function() {
  var ret = '[' + this.expr.toString() + ']';
  return ret;
}

PredicateExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[predicate]\n' + this.expr.parseTree(indent + ' ');
  return ret;
}

FunctionCallExpr.prototype.toString = function() {
  var ret = this.name.value + '(';
  for (var i = 0; i < this.args.length; ++i) {
    if (i > 0) {
      ret += ', ';
    }
    ret += this.args[i].toString();
  }
  ret += ')';
  return ret;
}

FunctionCallExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[function call] ' + this.name.value + '\n';
  for (var i = 0; i < this.args.length; ++i) {
    ret += this.args[i].parseTree(indent + ' ');
  }
  return ret;
}

UnionExpr.prototype.toString = function() {
  return this.expr1.toString() + ' | ' + this.expr2.toString();
}

UnionExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[union]\n' + 
  this.expr1.parseTree(indent + ' ') + 
  this.expr2.parseTree(indent + ' ');
  return ret;
}

PathExpr.prototype.toString = function() {
  var ret = '{path: {' + this.filter.toString() + '} {' + this.rel.toString() + 
  '}}';
  return ret;
}

PathExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[path]\n' + 
  indent + '- filter:\n' +
  this.filter.parseTree(indent + ' ') + 
  indent + '- location path:\n' +
  this.rel.parseTree(indent + ' ');
  return ret;
}

FilterExpr.prototype.toString = function() {
  var ret = this.expr.toString();
  for (var i = 0; i < this.predicate.length; ++i) {
    ret += this.predicate[i].toString();
  }
  return ret;
}

FilterExpr.prototype.parseTree = function(indent) {
  var ret = indent + '[filter]\n' + 
  indent + '- expr:\n' +
  this.expr.parseTree(indent + ' ');
  indent + '- predicates:\n';
  for (var i = 0; i < this.predicate.length; ++i) {
    ret += this.predicate[i].parseTree(indent + ' ');
  }
  return ret;
}

UnaryMinusExpr.prototype.toString = function() {
  return '-' + this.expr.toString();
}

UnaryMinusExpr.prototype.parseTree = function(indent) {
  return indent + '[unary] -\n' + this.expr.parseTree(indent + ' ');
}

BinaryExpr.prototype.toString = function() {
  return this.expr1.toString() + ' ' + this.op.value + ' ' + 
  this.expr2.toString();
}

BinaryExpr.prototype.parseTree = function(indent) {
  return indent + '[binary] ' + this.op.value + '\n' + 
  this.expr1.parseTree(indent + ' ') + 
  this.expr2.parseTree(indent + ' ');
}

LiteralExpr.prototype.toString = function() {
  return '"' + this.value + '"';
}

LiteralExpr.prototype.parseTree = function(indent) {
  return indent + '[literal] ' + this.toString() + '\n';
}

NumberExpr.prototype.toString = function() {
  return '' + this.value;
}

NumberExpr.prototype.parseTree = function(indent) {
  return indent + '[number] ' + this.toString() + '\n';
}

VariableExpr.prototype.toString = function() {
  return '$' + this.name;
}

VariableExpr.prototype.parseTree = function(indent) {
  return indent + '[variable] ' + this.toString() + '\n';
}

XNode.prototype.toString = function() {
  return this.nodeName;
}

ExprContext.prototype.toString = function() {
  return '[' + this.position + '/' + this.nodelist.length + '] ' + 
  this.node.nodeName;
}

function Value_toString() {
  return this.type + ': ' + this.value;
}

StringValue.prototype.toString = Value_toString;
NumberValue.prototype.toString = Value_toString;
BooleanValue.prototype.toString = Value_toString;
NodeSetValue.prototype.toString = Value_toString;