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Diffstat (limited to 'src/document.sections.cc')
| -rw-r--r-- | src/document.sections.cc | 540 |
1 files changed, 540 insertions, 0 deletions
diff --git a/src/document.sections.cc b/src/document.sections.cc new file mode 100644 index 0000000..da9c33f --- /dev/null +++ b/src/document.sections.cc @@ -0,0 +1,540 @@ +/** + * Copyright (c) 2022, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <utility> +#include <vector> + +#include "document.sections.hh" + +#include "base/enum_util.hh" +#include "base/itertools.hh" +#include "base/lnav_log.hh" +#include "base/opt_util.hh" +#include "data_scanner.hh" + +namespace lnav { +namespace document { + +nonstd::optional<hier_node*> +hier_node::lookup_child(section_key_t key) const +{ + return make_optional_from_nullable(key.match( + [this](const std::string& str) -> hier_node* { + auto iter = this->hn_named_children.find(str); + if (iter != this->hn_named_children.end()) { + return iter->second; + } + return nullptr; + }, + [this](size_t index) -> hier_node* { + if (index < this->hn_children.size()) { + return this->hn_children[index].get(); + } + return nullptr; + })); +} + +nonstd::optional<const hier_node*> +hier_node::lookup_path(const hier_node* root, + const std::vector<section_key_t>& path) +{ + auto retval = make_optional_from_nullable(root); + + for (const auto& comp : path) { + if (!retval) { + break; + } + + retval = retval.value()->lookup_child(comp); + } + + if (!retval) { + return nonstd::nullopt; + } + + return retval; +} + +struct metadata_builder { + std::vector<section_interval_t> mb_intervals; + std::unique_ptr<hier_node> mb_root_node; + + metadata to_metadata() && + { + return { + std::move(this->mb_intervals), + std::move(this->mb_root_node), + }; + } +}; + +static void +discover_metadata_int(const attr_line_t& al, metadata_builder& mb) +{ + const auto& orig_attrs = al.get_attrs(); + auto headers = orig_attrs + | lnav::itertools::filter_in([](const string_attr& attr) { + if (attr.sa_type != &VC_ROLE) { + return false; + } + + auto role = attr.sa_value.get<role_t>(); + switch (role) { + case role_t::VCR_H1: + case role_t::VCR_H2: + case role_t::VCR_H3: + case role_t::VCR_H4: + case role_t::VCR_H5: + case role_t::VCR_H6: + return true; + default: + return false; + } + }) + | lnav::itertools::sort_by(&string_attr::sa_range); + + // Remove headers from quoted text + for (const auto& orig_attr : orig_attrs) { + if (orig_attr.sa_type == &VC_ROLE + && orig_attr.sa_value.get<role_t>() == role_t::VCR_QUOTED_TEXT) + { + remove_string_attr(headers, orig_attr.sa_range); + } + } + + auto& intervals = mb.mb_intervals; + + struct open_interval_t { + open_interval_t(uint32_t level, file_off_t start, section_key_t id) + : oi_level(level), oi_start(start), oi_id(std::move(id)) + { + } + + int32_t oi_level; + file_off_t oi_start; + section_key_t oi_id; + std::unique_ptr<hier_node> oi_node{std::make_unique<hier_node>()}; + }; + std::vector<open_interval_t> open_intervals; + auto root_node = std::make_unique<hier_node>(); + + for (const auto& hdr_attr : headers) { + auto role = hdr_attr.sa_value.get<role_t>(); + auto role_num = lnav::enums::to_underlying(role) + - lnav::enums::to_underlying(role_t::VCR_H1); + std::vector<open_interval_t> new_open_intervals; + + for (auto& oi : open_intervals) { + if (oi.oi_level >= role_num) { + // close out this section + intervals.emplace_back( + oi.oi_start, hdr_attr.sa_range.lr_start - 1, oi.oi_id); + auto* node_ptr = oi.oi_node.get(); + auto* parent_node = oi.oi_node->hn_parent; + if (parent_node != nullptr) { + parent_node->hn_children.emplace_back( + std::move(oi.oi_node)); + parent_node->hn_named_children.insert({ + oi.oi_id.get<std::string>(), + node_ptr, + }); + } + } else { + new_open_intervals.emplace_back(std::move(oi)); + } + } + auto* parent_node = new_open_intervals.empty() + ? root_node.get() + : new_open_intervals.back().oi_node.get(); + new_open_intervals.emplace_back(role_num, + hdr_attr.sa_range.lr_start, + al.get_substring(hdr_attr.sa_range)); + new_open_intervals.back().oi_node->hn_parent = parent_node; + new_open_intervals.back().oi_node->hn_start + = hdr_attr.sa_range.lr_start; + + open_intervals = std::move(new_open_intervals); + } + + for (auto& oi : open_intervals) { + // close out this section + intervals.emplace_back(oi.oi_start, al.length(), oi.oi_id); + auto* node_ptr = oi.oi_node.get(); + auto* parent_node = oi.oi_node->hn_parent; + if (parent_node == nullptr) { + root_node = std::move(oi.oi_node); + } else { + parent_node->hn_children.emplace_back(std::move(oi.oi_node)); + parent_node->hn_named_children.insert({ + oi.oi_id.get<std::string>(), + node_ptr, + }); + } + } + + for (auto& interval : intervals) { + auto start_off_iter = find_string_attr_containing( + orig_attrs, &SA_ORIGIN_OFFSET, interval.start); + if (start_off_iter != orig_attrs.end()) { + interval.start += start_off_iter->sa_value.get<int64_t>(); + } + auto stop_off_iter = find_string_attr_containing( + orig_attrs, &SA_ORIGIN_OFFSET, interval.stop - 1); + if (stop_off_iter != orig_attrs.end()) { + interval.stop += stop_off_iter->sa_value.get<int64_t>(); + } + } + + hier_node::depth_first(root_node.get(), [&orig_attrs](hier_node* node) { + auto off_opt + = get_string_attr(orig_attrs, &SA_ORIGIN_OFFSET, node->hn_start); + + if (off_opt) { + node->hn_start += off_opt.value()->sa_value.get<int64_t>(); + } + }); + + if (!root_node->hn_children.empty() + || !root_node->hn_named_children.empty()) + { + mb.mb_root_node = std::move(root_node); + } +} + +metadata +discover_metadata(const attr_line_t& al) +{ + metadata_builder mb; + + discover_metadata_int(al, mb); + + return std::move(mb).to_metadata(); +} + +class structure_walker { +public: + explicit structure_walker(attr_line_t& al, line_range lr) + : sw_line(al), sw_range(lr), + sw_scanner(string_fragment::from_str_range( + al.get_string(), lr.lr_start, lr.lr_end)) + { + this->sw_interval_state.resize(1); + this->sw_hier_nodes.push_back(std::make_unique<hier_node>()); + } + + metadata walk() + { + metadata_builder mb; + size_t garbage_count = 0; + + while (garbage_count < 1000) { + auto tokenize_res = this->sw_scanner.tokenize2(); + if (!tokenize_res) { + break; + } + + auto dt = tokenize_res->tr_token; + element el(tokenize_res->tr_token, tokenize_res->tr_capture); + + switch (dt) { + case DT_XML_DECL_TAG: + case DT_XML_EMPTY_TAG: + this->sw_values.emplace_back(el); + break; + case DT_XML_OPEN_TAG: + this->flush_values(); + this->sw_interval_state.back().is_start + = el.e_capture.c_begin; + this->sw_interval_state.back().is_line_number + = this->sw_line_number; + this->sw_interval_state.back().is_name + = tokenize_res->to_string(); + this->sw_depth += 1; + this->sw_interval_state.resize(this->sw_depth + 1); + this->sw_hier_nodes.push_back( + std::make_unique<hier_node>()); + break; + case DT_XML_CLOSE_TAG: { + auto term = this->flush_values(); + if (this->sw_depth > 0) { + this->sw_depth -= 1; + this->append_child_node(term); + this->sw_interval_state.pop_back(); + this->sw_hier_stage + = std::move(this->sw_hier_nodes.back()); + this->sw_hier_nodes.pop_back(); + } + this->append_child_node(el.e_capture); + this->flush_values(); + break; + } + case DT_H1: { + this->sw_line.get_attrs().emplace_back( + line_range{ + this->sw_range.lr_start + el.e_capture.c_begin + 1, + this->sw_range.lr_start + el.e_capture.c_end - 1, + }, + VC_ROLE.value(role_t::VCR_H1)); + this->sw_line_number += 2; + break; + } + case DT_LCURLY: + case DT_LSQUARE: + case DT_LPAREN: { + this->flush_values(); + // this->append_child_node(term); + this->sw_depth += 1; + this->sw_interval_state.back().is_start + = el.e_capture.c_begin; + this->sw_interval_state.back().is_line_number + = this->sw_line_number; + this->sw_interval_state.resize(this->sw_depth + 1); + this->sw_hier_nodes.push_back( + std::make_unique<hier_node>()); + break; + } + case DT_RCURLY: + case DT_RSQUARE: + case DT_RPAREN: { + auto term = this->flush_values(); + if (this->sw_depth > 0) { + this->append_child_node(term); + this->sw_depth -= 1; + this->sw_interval_state.pop_back(); + this->sw_hier_stage + = std::move(this->sw_hier_nodes.back()); + this->sw_hier_nodes.pop_back(); + if (this->sw_interval_state.back().is_start) { + data_scanner::capture_t obj_cap = { + static_cast<int>(this->sw_interval_state.back() + .is_start.value()), + el.e_capture.c_end, + }; + + auto sf + = this->sw_scanner.to_string_fragment(obj_cap); + if (!sf.find('\n')) { + this->sw_hier_stage->hn_named_children.clear(); + this->sw_hier_stage->hn_children.clear(); + while (!this->sw_intervals.empty() + && this->sw_intervals.back().start + > obj_cap.c_begin) + { + this->sw_intervals.pop_back(); + } + } + } + } + this->sw_values.emplace_back(el); + break; + } + case DT_COMMA: + if (this->sw_depth > 0) { + auto term = this->flush_values(); + this->append_child_node(term); + } + break; + case DT_LINE: + this->sw_line_number += 1; + break; + case DT_WHITE: + break; + default: + if (dt == DT_GARBAGE) { + garbage_count += 1; + } + this->sw_values.emplace_back(el); + break; + } + } + this->flush_values(); + + if (this->sw_hier_stage != nullptr) { + this->sw_hier_stage->hn_parent = this->sw_hier_nodes.back().get(); + this->sw_hier_nodes.back()->hn_children.push_back( + std::move(this->sw_hier_stage)); + } + this->sw_hier_stage = std::move(this->sw_hier_nodes.back()); + this->sw_hier_nodes.pop_back(); + if (this->sw_hier_stage->hn_children.size() == 1 + && this->sw_hier_stage->hn_named_children.empty()) + { + this->sw_hier_stage + = std::move(this->sw_hier_stage->hn_children.front()); + this->sw_hier_stage->hn_parent = nullptr; + } + + mb.mb_root_node = std::move(this->sw_hier_stage); + mb.mb_intervals = std::move(this->sw_intervals); + + discover_metadata_int(this->sw_line, mb); + + return std::move(mb).to_metadata(); + } + +private: + struct element { + element(data_token_t token, data_scanner::capture_t& cap) + : e_token(token), e_capture(cap) + { + } + + data_token_t e_token; + data_scanner::capture_t e_capture; + }; + + struct interval_state { + nonstd::optional<file_off_t> is_start; + size_t is_line_number{0}; + std::string is_name; + }; + + nonstd::optional<data_scanner::capture_t> flush_values() + { + nonstd::optional<data_scanner::capture_t> last_key; + nonstd::optional<data_scanner::capture_t> retval; + + if (!this->sw_values.empty()) { + if (!this->sw_interval_state.back().is_start) { + this->sw_interval_state.back().is_start + = this->sw_values.front().e_capture.c_begin; + this->sw_interval_state.back().is_line_number + = this->sw_line_number; + } + retval = this->sw_values.back().e_capture; + } + for (const auto& el : this->sw_values) { + switch (el.e_token) { + case DT_SYMBOL: + case DT_CONSTANT: + case DT_WORD: + case DT_QUOTED_STRING: + last_key = el.e_capture; + break; + case DT_COLON: + case DT_EQUALS: + if (last_key) { + this->sw_interval_state.back().is_name + = this->sw_scanner + .to_string_fragment(last_key.value()) + .to_string(); + if (!this->sw_interval_state.back().is_name.empty()) { + this->sw_interval_state.back().is_start + = static_cast<ssize_t>( + last_key.value().c_begin); + this->sw_interval_state.back().is_line_number + = this->sw_line_number; + } + last_key = nonstd::nullopt; + } + break; + default: + break; + } + } + + this->sw_values.clear(); + + return retval; + } + + void append_child_node(nonstd::optional<data_scanner::capture_t> terminator) + { + auto& ivstate = this->sw_interval_state.back(); + if (!ivstate.is_start || !terminator || this->sw_depth == 0) { + ivstate.is_start = nonstd::nullopt; + ivstate.is_line_number = 0; + ivstate.is_name.clear(); + return; + } + + auto new_node = this->sw_hier_stage != nullptr + ? std::move(this->sw_hier_stage) + : std::make_unique<lnav::document::hier_node>(); + auto iv_start = ivstate.is_start.value(); + auto iv_stop = static_cast<ssize_t>(terminator.value().c_end); + auto* top_node = this->sw_hier_nodes.back().get(); + auto new_key = ivstate.is_name.empty() + ? lnav::document::section_key_t{top_node->hn_children.size()} + : lnav::document::section_key_t{ivstate.is_name}; + this->sw_intervals.emplace_back(iv_start, iv_stop, new_key); + auto* retval = new_node.get(); + new_node->hn_parent = top_node; + new_node->hn_start = this->sw_intervals.back().start; + new_node->hn_line_number = ivstate.is_line_number; + if (!ivstate.is_name.empty()) { + top_node->hn_named_children.insert({ + ivstate.is_name, + retval, + }); + } + top_node->hn_children.emplace_back(std::move(new_node)); + ivstate.is_start = nonstd::nullopt; + ivstate.is_line_number = 0; + ivstate.is_name.clear(); + } + + attr_line_t& sw_line; + line_range sw_range; + data_scanner sw_scanner; + int sw_depth{0}; + size_t sw_line_number{0}; + std::vector<element> sw_values{}; + std::vector<interval_state> sw_interval_state; + std::vector<lnav::document::section_interval_t> sw_intervals; + std::vector<std::unique_ptr<lnav::document::hier_node>> sw_hier_nodes; + std::unique_ptr<lnav::document::hier_node> sw_hier_stage; +}; + +metadata +discover_structure(attr_line_t& al, struct line_range lr) +{ + return structure_walker(al, lr).walk(); +} + +std::vector<breadcrumb::possibility> +metadata::possibility_provider(const std::vector<section_key_t>& path) +{ + std::vector<breadcrumb::possibility> retval; + auto curr_node = lnav::document::hier_node::lookup_path( + this->m_sections_root.get(), path); + if (curr_node) { + auto* parent_node = curr_node.value()->hn_parent; + + if (parent_node != nullptr) { + for (const auto& sibling : parent_node->hn_named_children) { + retval.template emplace_back(sibling.first); + } + } + } + return retval; +} + +} // namespace document +} // namespace lnav |