configmgr/source/partial.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <cassert>
  23 #include <map>
  24 #include <set>
  25
  26 #include <com/sun/star/uno/RuntimeException.hpp>
  27 #include <com/sun/star/uno/XInterface.hpp>
  28 #include <rtl/ustring.h>
  29 #include <rtl/ustring.hxx>
  30 #include <sal/types.h>
  31
  32 #include "data.hxx"
  33 #include "partial.hxx"
  34
  35 namespace configmgr {
  36
  37 namespace {
  38
  39 bool parseSegment(
  40     OUString const & path, sal_Int32 * index, OUString * segment)
  41 {
  42     assert(
  43         index != nullptr && *index >= 0 && *index <= path.getLength() &&
  44         segment != nullptr);
  45     if (path[(*index)++] == '/') {
  46         OUString name;
  47         bool setElement;
  48         OUString templateName;
  49         *index = Data::parseSegment(
  50             path, *index, &name, &setElement, &templateName);
  51         if (*index != -1) {
  52             *segment = Data::createSegment(templateName, name);
  53             return *index == path.getLength();
  54         }
  55     }
  56     throw css::uno::RuntimeException("bad path " + path);
  57 }
  58
  59 }
  60
  61 Partial::Partial(
  62     std::set< OUString > const & includedPaths,
  63     std::set< OUString > const & excludedPaths)
  64 {
  65     // The Partial::Node tree built up here encodes the following information:
  66     // * Inner node, startInclude: an include starts here that contains excluded
  67     //   sub-trees
  68     // * Inner node, !startInclude: contains in-/excluded sub-trees
  69     // * Leaf node, startInclude: an include starts here
  70     // * Leaf node, !startInclude: an exclude starts here
  71     for (auto const& includedPath : includedPaths)
  72     {
  73         sal_Int32 n = 0;
  74         for (Node * p = &root_;;) {
  75             OUString seg;
  76             bool end = parseSegment(includedPath, &n, &seg);
  77             p = &p->children[seg];
  78             if (p->startInclude) {
  79                 break;
  80             }
  81             if (end) {
  82                 p->children.clear();
  83                 p->startInclude = true;
  84                 break;
  85             }
  86         }
  87     }
  88     for (auto const& excludedPath : excludedPaths)
  89     {
  90         sal_Int32 n = 0;
  91         for (Node * p = &root_;;) {
  92             OUString seg;
  93             bool end = parseSegment(excludedPath, &n, &seg);
  94             if (end) {
  95                 p->children[seg].clear();
  96                 break;
  97             }
  98             Node::Children::iterator j(p->children.find(seg));
  99             if (j == p->children.end()) {
 100                 break;
 101             }
 102             p = &j->second;
 103         }
 104     }
 105 }
 106
 107 Partial::~Partial() {}
 108
 109 Partial::Containment Partial::contains(std::vector<OUString> const & path) const {
 110     //TODO: For set elements, the segment names recorded in the node tree need
 111     // not match the corresponding path segments, so this function can fail.
 112
 113     // * If path ends at a leaf node or goes past a leaf node:
 114     // ** If that leaf node is startInclude: => CONTAINS_NODE
 115     // ** If that leaf node is !startInclude: => CONTAINS_NOT
 116     // * If path ends at inner node:
 117     // ** If there is some startInclude along its trace: => CONTAINS_NODE
 118     // ** If there is no startInclude along its trace: => CONTAINS_SUBNODES
 119     Node const * p = &root_;
 120     bool bIncludes = false;
 121     for (auto const& elemPath : path)
 122     {
 123         Node::Children::const_iterator j(p->children.find(elemPath));
 124         if (j == p->children.end()) {
 125             return p->startInclude ? CONTAINS_NODE : CONTAINS_NOT;
 126         }
 127         p = &j->second;
 128         bIncludes |= p->startInclude;
 129     }
 130     return p->children.empty() && !p->startInclude
 131         ? CONTAINS_NOT
 132         : bIncludes ? CONTAINS_NODE : CONTAINS_SUBNODES;
 133 }
 134
 135 }
 136
 137 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */