Changes to orcus for implementing XML data provider

Change-Id: I70075f4240c75f0f46260bb77b160f0b75d6ae94
Reviewed-on: https://gerrit.libreoffice.org/56354
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/external/liborcus/0001-add-xml-path.patch b/external/liborcus/0001-add-xml-path.patch
new file mode 100644
index 000000000000..3f9a16bb880f
--- /dev/null
+++ b/external/liborcus/0001-add-xml-path.patch
@@ -0,0 +1,119 @@
+diff --git a/include/orcus/xml_structure_tree.hpp b/include/orcus/xml_structure_tree.hpp
+index 58cabfd116fa24e35ff27cf8d7512b6e73df33f4..c88808d24bd74c175fa4017328d3e54b4c588c5e 100644
+--- a/include/orcus/xml_structure_tree.hpp
++++ b/include/orcus/xml_structure_tree.hpp
+@@ -127,6 +127,20 @@ public:
+         size_t get_xmlns_index(xmlns_id_t ns) const;
+
+         std::string get_xmlns_short_name(xmlns_id_t ns) const;
++
++        /**
++         * Get a XPath like ID for the element inside of the XML tree.
++         *
++         */
++        std::string get_path() const;
++
++        /**
++         * Select an element by a path expression. The path expression may be
++         * generated by <code>xml_structure_tree::walker::get_path</code>.
++         *
++         * @param path a simple XPath like expression
++         */
++        element select_by_path(const std::string& path);
+     };
+
+     xml_structure_tree(xmlns_context& xmlns_cxt);
+diff --git a/src/liborcus/xml_structure_tree.cpp b/src/liborcus/xml_structure_tree.cpp
+index 2778bc05f32841a9441bf471913872e119256895..6622bc57cd2595f12bba80d4bbdb5c24cd6e7bc6 100644
+--- a/src/liborcus/xml_structure_tree.cpp
++++ b/src/liborcus/xml_structure_tree.cpp
+@@ -12,6 +12,7 @@
+ #include "orcus/exception.hpp"
+
+ #include "orcus/string_pool.hpp"
++#include "string_helper.hpp"
+
+ #include <iostream>
+ #include <sstream>
+@@ -275,6 +276,15 @@ struct xml_structure_tree_impl
+     {
+         delete mp_root;
+     }
++
++    std::string get_element_str(const xml_structure_tree::entity_name& name) const
++    {
++        ostringstream ss;
++        if (m_xmlns_cxt.get_index(name.ns) != index_not_found)
++            ss << m_xmlns_cxt.get_short_name(name.ns) << ":";
++        ss << name.name;
++        return ss.str();
++    }
+ };
+
+ struct xml_structure_tree::walker_impl
+@@ -423,6 +433,66 @@ string xml_structure_tree::walker::get_xmlns_short_name(xmlns_id_t ns) const
+     return mp_impl->m_parent_impl.m_xmlns_cxt.get_short_name(ns);
+ }
+
++string xml_structure_tree::walker::get_path() const
++{
++    ostringstream ss;
++    for (auto& element : mp_impl->m_scopes)
++    {
++        ss << "/" << mp_impl->m_parent_impl.get_element_str(element.name);
++    }
++
++    return ss.str();
++}
++
++xml_structure_tree::element xml_structure_tree::walker::select_by_path(const std::string& path)
++{
++    pstring p(path);
++    std::vector<pstring> parts = string_helper::split_string(p, '/');
++    if (parts.empty())
++        throw general_error("invalid format for path");
++
++    // string_helper::split_string will create an empty first element due to leading '/'
++    if (parts[0] != "")
++    {
++        throw general_error("invalid format for path");
++    }
++    else
++    {
++        parts.erase(parts.begin());
++    }
++
++    if (parts.empty())
++        throw general_error("invalid format for path");
++
++    element_ref root_ref(mp_impl->mp_root->name, &mp_impl->mp_root->prop);
++    if (pstring(mp_impl->m_parent_impl.get_element_str(root_ref.name)) != parts[0])
++        throw general_error("path does not match any element");
++
++    std::vector<element_ref> scopes;
++    scopes.push_back(root_ref);
++
++    for (size_t i = 1; i < parts.size(); ++i)
++    {
++        const elem_prop& prop = *scopes.back().prop;
++        bool found = false;
++        for (auto& child : prop.child_elements)
++        {
++            if (pstring(mp_impl->m_parent_impl.get_element_str(child.first)) == parts[i])
++            {
++                scopes.emplace_back(child.first, child.second);
++                found = true;
++                break;
++            }
++        }
++        if (!found)
++            throw general_error("path does not match any element");
++    }
++
++    std::swap(mp_impl->m_scopes, scopes);
++    const element_ref& ref = mp_impl->m_scopes.back();
++    return element(ref.name, ref.prop->repeat);
++}
++
+ xml_structure_tree::xml_structure_tree(xmlns_context& xmlns_cxt) :
+     mp_impl(new xml_structure_tree_impl(xmlns_cxt)) {}