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 xml_structure_tree::walker::get_path. + * + * @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 #include @@ -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 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 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)) {} LibreOffice 核心代码仓库文档基金会
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2018-01-23More loplugin:cstylecast on WindowsStephan Bergmann
2018-01-20More loplugin:cstylecast on macOSStephan Bergmann
2018-01-12More loplugin:cstylecast: jvmfwkStephan Bergmann
2017-12-19inline use-once typedefsNoel Grandin
2017-11-23loplugin:simplifybool for negation of comparison operatorNoel Grandin
2017-11-13Fix typosAndrea Gelmini
2017-11-01loplugin:finalclasses in h*,i*,j*Noel Grandin
2017-10-23loplugin:includeform: jvmfwkStephan Bergmann
2017-10-13Use loop ranges in jvmfwkJulien Nabet
2017-10-05Rename and move SAL_U/W to o3tl::toU/WMike Kaganski
2017-09-30Use SAL_W/SAL_U instead of reinterpret_cast btwn wchar_t* and sal_Unicode*Mike Kaganski
2017-09-30Use explicit function names for fooA/fooW WinAPI; prefer fooWMike Kaganski
2017-09-18Some more WIN32_LEAN_AND_MEANMike Kaganski
2017-09-11clang-tidy modernize-use-emplace in hwpfilter..lotuswordproNoel Grandin