/usr/include/kml/dom/visitor_driver.h is in libkml-dev 1.3.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | // Copyright 2009, Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// WARNING: THE VISITOR API IMPLEMENTED IN THIS CLASS IS EXPERIMENTAL AND
// SUBJECT TO CHANGE WITHOUT WARNING.
#ifndef KML_DOM_VISITOR_DRIVER_H__
#define KML_DOM_VISITOR_DRIVER_H__
#include "kml/base/util.h"
#include "kml/dom/kml_ptr.h"
#include "kml/dom/visitor.h"
namespace kmldom {
// A visitor driver controls the flow of a visitation over the dom element
// hierarchy. There is typically expected to be only a single driver for each
// visitation and currently there is not concept of chaining drivers (though
// visitors themselves could be chained within a single 'multi driver').
class VisitorDriver {
protected:
VisitorDriver();
virtual ~VisitorDriver();
public:
// Handles the visitation of the subtree of elements rooted at the given
// element. This method is invoked either by the user to initiate a visitation
// or in response to a call to AcceptChildren() for an element.
//
// Typically when a driver visits an element it will, in some order:
// - call accept() on the given element for some set of visitors
// - call acceptChildren() on the given element, passing itself
// However there is no requirement that either of these actually occur and
// the driver is free to implement whatever semantics it chooses.
virtual void Visit(const ElementPtr& element) = 0;
LIBKML_DISALLOW_EVIL_CONSTRUCTORS(VisitorDriver);
};
// A simple driver implementation that invokes a single visitor in pre-order
// traversal of an element hierarchy. The visitor will visit each element in a
// hierarchy before that element's children are visited.
class SimplePreorderDriver : public VisitorDriver {
public:
explicit SimplePreorderDriver(Visitor* visitor);
virtual ~SimplePreorderDriver();
virtual void Visit(const ElementPtr& element);
private:
Visitor* visitor_;
LIBKML_DISALLOW_EVIL_CONSTRUCTORS(SimplePreorderDriver);
};
// A simple driver implementation that invokes a single visitor in post-order
// traversal of an element hierarchy. The visitor will visit each element in a
// hierarchy after that element's children have been visited.
class SimplePostorderDriver : public VisitorDriver {
public:
explicit SimplePostorderDriver(Visitor* visitor);
virtual ~SimplePostorderDriver();
virtual void Visit(const ElementPtr& element);
private:
Visitor* visitor_;
LIBKML_DISALLOW_EVIL_CONSTRUCTORS(SimplePostorderDriver);
};
} // namespace kmldom
#endif // KML_DOM_VISITOR_DRIVER_H__
|