partial.cxx

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#include <sal/config.h>
 
#include <cassert>
#include <set>
 
#include <com/sun/star/uno/RuntimeException.hpp>
#include <rtl/ustring.hxx>
#include <sal/types.h>
 
#include "data.hxx"
#include "partial.hxx"
 
namespace configmgr {
 
namespace {
 
bool parseSegment(
    OUString const & path, sal_Int32 * index, OUString * segment)
{
    assert(
        index != nullptr && *index >= 0 && *index <= path.getLength() &&
        segment != nullptr);
    if (path[(*index)++] == '/') {
        OUString name;
        bool setElement;
        OUString templateName;
        *index = Data::parseSegment(
            path, *index, &name, &setElement, &templateName);
        if (*index != -1) {
            *segment = Data::createSegment(templateName, name);
            return *index == path.getLength();
        }
    }
    throw css::uno::RuntimeException("bad path " + path);
}
 
}
 
Partial::Partial(
    std::set< OUString > const & includedPaths,
    std::set< OUString > const & excludedPaths)
{
    // The Partial::Node tree built up here encodes the following information:
    // * Inner node, startInclude: an include starts here that contains excluded
    //   sub-trees
    // * Inner node, !startInclude: contains in-/excluded sub-trees
    // * Leaf node, startInclude: an include starts here
    // * Leaf node, !startInclude: an exclude starts here
    for (auto const& includedPath : includedPaths)
    {
        sal_Int32 n = 0;
        for (Node * p = &root_;;) {
            OUString seg;
            bool end = parseSegment(includedPath, &n, &seg);
            p = &p->children[seg];
            if (p->startInclude) {
                break;
            }
            if (end) {
                p->children.clear();
                p->startInclude = true;
                break;
            }
        }
    }
    for (auto const& excludedPath : excludedPaths)
    {
        sal_Int32 n = 0;
        for (Node * p = &root_;;) {
            OUString seg;
            bool end = parseSegment(excludedPath, &n, &seg);
            if (end) {
                p->children[seg].clear();
                break;
            }
            Node::Children::iterator j(p->children.find(seg));
            if (j == p->children.end()) {
                break;
            }
            p = &j->second;
        }
    }
}
 
Partial::~Partial() {}
 
Partial::Containment Partial::contains(std::vector<OUString> const & path) const {
    //TODO: For set elements, the segment names recorded in the node tree need
    // not match the corresponding path segments, so this function can fail.
 
    // * If path ends at a leaf node or goes past a leaf node:
    // ** If that leaf node is startInclude: => CONTAINS_NODE
    // ** If that leaf node is !startInclude: => CONTAINS_NOT
    // * If path ends at inner node:
    // ** If there is some startInclude along its trace: => CONTAINS_NODE
    // ** If there is no startInclude along its trace: => CONTAINS_SUBNODES
    Node const * p = &root_;
    bool bIncludes = false;
    for (auto const& elemPath : path)
    {
        Node::Children::const_iterator j(p->children.find(elemPath));
        if (j == p->children.end()) {
            return p->startInclude ? CONTAINS_NODE : CONTAINS_NOT;
        }
        p = &j->second;
        bIncludes |= p->startInclude;
    }
    return p->children.empty() && !p->startInclude
        ? CONTAINS_NOT
        : bIncludes ? CONTAINS_NODE : CONTAINS_SUBNODES;
}
 
}
 
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