File indexing completed on 2024-04-14 03:53:19

 /*
     SPDX-FileCopyrightText: 2015 Gregor Mi <codestruct@posteo.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef URLUTIL_P_H
 #define URLUTIL_P_H
 
 #include <QUrl>
 
 namespace KIO
 {
 namespace UrlUtil
 {
 /**
  * Given that @p lastUrl is a child of @p currentUrl
  * or put in other words:
  * @p currentUrl is a parent in the hierarchy of @p lastUrl,
  * then an URL 'currentUrl'/'childitem' is returned where
  * 'childitem' is the first item in the hierarchy down to
  * @p lastUrl. An example will illustrate this:
 
    \verbatim
    lastUrl    : "/home/test/data/documents/muh/"
    currentUrl : "/home/test/"
    returns    : "/home/test/data/"
    \endverbatim
 
  * In case @p currentUrl is a child of @p lastUrl, an invalid
  * URL is returned:
 
    \verbatim
    lastUrl    : "/home/"
    currentUrl : "/home/test/"
    returns    : "" (invalid url)
    \endverbatim
 
  * In case both URLs are equal, an invalid URL is returned:
 
    \verbatim
    lastUrl    : "/home/test/"
    currentUrl : "/home/test/"
    returns    : "" (invalid url)
    \endverbatim
  */
 static QUrl firstChildUrl(const QUrl &lastUrl, const QUrl &currentUrl)
 {
     const QUrl adjustedLastUrl = lastUrl.adjusted(QUrl::StripTrailingSlash);
     const QUrl adjustedCurrentUrl = currentUrl.adjusted(QUrl::StripTrailingSlash);
     if (!adjustedCurrentUrl.isParentOf(adjustedLastUrl)) {
         return QUrl();
     }
 
     const QString childPath = adjustedLastUrl.path();
     const QString parentPath = adjustedCurrentUrl.path();
     // if the parent path is root "/"
     // one char more is a valid path, otherwise "/" and another char are needed.
     const int minIndex = (parentPath == QLatin1String("/")) ? 1 : 2;
 
     // e.g. this would just be ok:
     // childPath  = /a        len=2
     // parentPath = /         len=1
     // childPath  = /home/a   len=7
     // parentPath = /home     len=5
 
     if (childPath.length() < (parentPath.length() + minIndex)) {
         return QUrl();
     }
 
     const int idx2 = childPath.indexOf(QLatin1Char('/'), parentPath.length() + minIndex);
     // parentPath = /home
     // childPath  = /home/a
     //                 idx  = -1
     //              => len2 =  7
     //
     // childPath = /homa/a/b
     //                 idx  = 7
     //              => len2 = 7
     const int len2 = (idx2 < 0) ? childPath.length() : idx2;
 
     const QString path3 = childPath.left(len2);
 
     QUrl res = lastUrl; // keeps the scheme (e.g. file://)
     res.setPath(path3);
     return res;
 }
 }
 }
 
 #endif