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80 lines
3.5 KiB
C
80 lines
3.5 KiB
C
2 years ago
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// Copyright 2008, Google Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// 3. Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file contains function templates useful for accessing link element data.
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#ifndef KML_ENGINE_LINK_UTIL_H__
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#define KML_ENGINE_LINK_UTIL_H__
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#include "kml/dom.h"
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#include "kml/engine.h"
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namespace kmlengine {
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// This function fetches and parses the KML referenced by this NetworkLink.
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// The NetworkLink must be within the KmlFile and the KmlFile must point to
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// a KmlCache (such as a KmlFile created by KmlCache).
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// If the fetch or parse fail a NULL KmlFilePtr is returned.
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KmlFilePtr FetchLink(const KmlFilePtr& kml_file,
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const kmldom::NetworkLinkPtr& networklink);
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// This function fetches the Overlay's Icon image data. The KmlFile must have
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// a KmlCache (see KmlCache). If the fetch fails false is returned.
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bool FetchIcon(const KmlFilePtr& kml_file,
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const kmldom::OverlayPtr& overlay,
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string* data);
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// This function template gets the content of the <href> child of <Link>,
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// <Icon>, <ItemIcon> and <IconStyle>'s <Icon>. This returns true if both
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// arguments are non-NULL and if the has_href() test passes for the parent,
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// else false is returned. (It is safe to pass all or some NULL arguments).
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template<typename HP>
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bool GetHref(const HP& href_parent, string* href) {
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if (href && href_parent && href_parent->has_href()) {
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*href = href_parent->get_href();
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return true;
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}
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return false;
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}
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// This function template gets the content of the <href> of the <Link> child
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// of <NetworkLink> and <Model>. See GetHref() for info about the return.
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template<typename LP>
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bool GetLinkParentHref(const LP& link_parent, string* href) {
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return GetHref(link_parent->get_link(), href);
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}
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// This function template gets the content of the <href> of the <Icon> child
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// of any Overlay, or of <IconStyle>. See GetHref() for info about the return.
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template<typename IP>
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bool GetIconParentHref(const IP& icon_parent, string* href) {
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return GetHref(icon_parent->get_icon(), href);
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}
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} // end namespace kmlengine
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#endif // KML_ENGINE_LINK_UTIL_H__
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