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524 lines
19 KiB
C++
524 lines
19 KiB
C++
2 years ago
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/**
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* Copyright (c) 2022, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "md2attr_line.hh"
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#include "base/attr_line.builder.hh"
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#include "base/itertools.hh"
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#include "base/lnav_log.hh"
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#include "pcrepp/pcrepp.hh"
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#include "readline_highlighters.hh"
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#include "view_curses.hh"
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using namespace lnav::roles::literals;
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void
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md2attr_line::flush_footnotes()
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{
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if (this->ml_footnotes.empty()) {
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return;
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}
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auto& block_text = this->ml_blocks.back();
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auto longest_foot = this->ml_footnotes
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| lnav::itertools::map(&attr_line_t::utf8_length_or_length)
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| lnav::itertools::max(0);
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size_t index = 1;
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block_text.append("\n");
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for (auto& foot : this->ml_footnotes) {
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block_text.append(lnav::string::attrs::preformatted(" "))
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.append("\u258c"_footnote_border)
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.append(lnav::roles::footnote_text(
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index < 10 && this->ml_footnotes.size() >= 10 ? " " : ""))
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.append(lnav::roles::footnote_text(
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fmt::format(FMT_STRING("[{}] - "), index)))
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.append(foot.pad_to(longest_foot))
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.append("\n");
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index += 1;
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}
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this->ml_footnotes.clear();
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}
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Result<void, std::string>
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md2attr_line::enter_block(const md4cpp::event_handler::block& bl)
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{
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if (this->ml_list_stack.empty()
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&& (bl.is<MD_BLOCK_H_DETAIL*>() || bl.is<block_hr>()
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|| bl.is<block_p>()))
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{
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this->flush_footnotes();
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}
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this->ml_blocks.resize(this->ml_blocks.size() + 1);
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if (bl.is<MD_BLOCK_OL_DETAIL*>()) {
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auto* ol_detail = bl.get<MD_BLOCK_OL_DETAIL*>();
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this->ml_list_stack.emplace_back(*ol_detail);
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} else if (bl.is<MD_BLOCK_UL_DETAIL*>()) {
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this->ml_list_stack.emplace_back(bl.get<MD_BLOCK_UL_DETAIL*>());
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} else if (bl.is<MD_BLOCK_TABLE_DETAIL*>()) {
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this->ml_tables.resize(this->ml_tables.size() + 1);
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} else if (bl.is<block_tr>()) {
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this->ml_tables.back().t_rows.resize(
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this->ml_tables.back().t_rows.size() + 1);
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} else if (bl.is<MD_BLOCK_CODE_DETAIL*>()) {
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this->ml_code_depth += 1;
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}
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return Ok();
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}
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Result<void, std::string>
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md2attr_line::leave_block(const md4cpp::event_handler::block& bl)
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{
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auto block_text = std::move(this->ml_blocks.back());
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this->ml_blocks.pop_back();
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auto& last_block = this->ml_blocks.back();
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if (!endswith(block_text.get_string(), "\n")) {
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block_text.append("\n");
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}
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if (bl.is<MD_BLOCK_H_DETAIL*>()) {
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auto* hbl = bl.get<MD_BLOCK_H_DETAIL*>();
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auto role = role_t::VCR_TEXT;
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switch (hbl->level) {
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case 1:
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role = role_t::VCR_H1;
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break;
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case 2:
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role = role_t::VCR_H2;
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break;
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case 3:
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role = role_t::VCR_H3;
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break;
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case 4:
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role = role_t::VCR_H4;
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break;
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case 5:
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role = role_t::VCR_H5;
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break;
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case 6:
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role = role_t::VCR_H6;
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break;
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}
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block_text.rtrim().with_attr_for_all(VC_ROLE.value(role));
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last_block.append("\n").append(block_text).append("\n");
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} else if (bl.is<block_hr>()) {
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block_text = attr_line_t()
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.append(lnav::roles::hr(repeat("\u2501", 70)))
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.with_attr_for_all(SA_PREFORMATTED.value());
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last_block.append("\n").append(block_text).append("\n");
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} else if (bl.is<MD_BLOCK_UL_DETAIL*>() || bl.is<MD_BLOCK_OL_DETAIL*>()) {
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this->ml_list_stack.pop_back();
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if (last_block.empty()) {
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last_block.append("\n");
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} else {
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if (!endswith(last_block.get_string(), "\n")) {
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last_block.append("\n");
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}
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if (this->ml_list_stack.empty()
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&& !endswith(last_block.get_string(), "\n\n")) {
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last_block.append("\n");
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}
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}
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last_block.append(block_text);
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} else if (bl.is<MD_BLOCK_LI_DETAIL*>()) {
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auto last_list_block = this->ml_list_stack.back();
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text_wrap_settings tws = {0, 60};
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attr_line_builder alb(last_block);
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{
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auto prefix = alb.with_attr(SA_PREFORMATTED.value());
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alb.append(" ")
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.append(last_list_block.match(
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[this, &tws](const MD_BLOCK_UL_DETAIL*) {
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tws.tws_indent = 3;
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return this->ml_list_stack.size() % 2 == 1
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? "\u2022"_list_glyph
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: "\u2014"_list_glyph;
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},
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[this, &tws](MD_BLOCK_OL_DETAIL ol_detail) {
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auto retval = lnav::roles::list_glyph(
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fmt::format(FMT_STRING("{}{}"),
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ol_detail.start,
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ol_detail.mark_delimiter));
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tws.tws_indent = retval.first.length() + 2;
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this->ml_list_stack.pop_back();
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ol_detail.start += 1;
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this->ml_list_stack.emplace_back(ol_detail);
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return retval;
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}))
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.append(" ");
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}
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alb.append(block_text, &tws);
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} else if (bl.is<MD_BLOCK_CODE_DETAIL*>()) {
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auto* code_detail = bl.get<MD_BLOCK_CODE_DETAIL*>();
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this->ml_code_depth -= 1;
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auto lang_sf = string_fragment{
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code_detail->lang.text,
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0,
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(int) code_detail->lang.size,
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};
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if (lang_sf == "lnav") {
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readline_lnav_highlighter(block_text, block_text.length());
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}
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auto code_lines = block_text.rtrim().split_lines();
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auto max_width = code_lines
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| lnav::itertools::map(&attr_line_t::utf8_length_or_length)
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| lnav::itertools::max(0);
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attr_line_t padded_text;
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for (auto& line : code_lines) {
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line.pad_to(std::max(max_width + 4, ssize_t{40}))
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.with_attr_for_all(VC_ROLE.value(role_t::VCR_QUOTED_CODE));
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padded_text.append(lnav::string::attrs::preformatted(" "))
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.append("\u258c"_code_border)
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.append(line)
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.append("\n");
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}
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padded_text.with_attr_for_all(SA_PREFORMATTED.value());
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last_block.append("\n").append(padded_text);
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} else if (bl.is<block_quote>()) {
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text_wrap_settings tws = {0, 60};
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attr_line_t wrapped_text;
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wrapped_text.append(block_text.rtrim(), &tws);
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auto quoted_lines = wrapped_text.split_lines();
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auto max_width = quoted_lines
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| lnav::itertools::map(&attr_line_t::utf8_length_or_length)
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| lnav::itertools::max(0);
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attr_line_t padded_text;
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for (auto& line : quoted_lines) {
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line.pad_to(max_width + 1)
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.with_attr_for_all(VC_ROLE.value(role_t::VCR_QUOTED_TEXT));
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padded_text.append(" ")
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.append("\u258c"_quote_border)
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.append(line)
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.append("\n");
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}
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padded_text.with_attr_for_all(SA_PREFORMATTED.value());
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last_block.append("\n").append(padded_text);
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} else if (bl.is<MD_BLOCK_TABLE_DETAIL*>()) {
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auto* table_detail = bl.get<MD_BLOCK_TABLE_DETAIL*>();
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auto tab = std::move(this->ml_tables.back());
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this->ml_tables.pop_back();
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std::vector<ssize_t> max_col_sizes;
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block_text.clear();
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block_text.append("\n");
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max_col_sizes.resize(table_detail->col_count);
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for (size_t lpc = 0; lpc < table_detail->col_count; lpc++) {
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if (lpc < tab.t_headers.size()) {
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max_col_sizes[lpc] = tab.t_headers[lpc].utf8_length_or_length();
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tab.t_headers[lpc].with_attr_for_all(
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VC_ROLE.value(role_t::VCR_TABLE_HEADER));
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}
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}
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for (const auto& row : tab.t_rows) {
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for (size_t lpc = 0; lpc < table_detail->col_count; lpc++) {
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if (lpc >= row.r_columns.size()) {
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continue;
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}
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auto col_len = row.r_columns[lpc].utf8_length_or_length();
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if (col_len > max_col_sizes[lpc]) {
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max_col_sizes[lpc] = col_len;
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}
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}
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}
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auto col_sizes
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= max_col_sizes | lnav::itertools::map([](const auto& elem) {
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return std::min(elem, ssize_t{50});
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});
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auto full_width = col_sizes | lnav::itertools::sum();
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text_wrap_settings tws = {0, 50};
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std::vector<cell_lines> cells;
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size_t max_cell_lines = 0;
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for (size_t lpc = 0; lpc < tab.t_headers.size(); lpc++) {
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tws.with_width(col_sizes[lpc]);
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attr_line_t td_block;
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td_block.append(tab.t_headers[lpc], &tws);
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cells.emplace_back(td_block.rtrim().split_lines());
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if (cells.back().cl_lines.size() > max_cell_lines) {
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max_cell_lines = cells.back().cl_lines.size();
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}
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}
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for (size_t line_index = 0; line_index < max_cell_lines; line_index++) {
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size_t col = 0;
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for (const auto& cell : cells) {
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block_text.append(" ");
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if (line_index < cell.cl_lines.size()) {
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block_text.append(cell.cl_lines[line_index]);
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block_text.append(
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col_sizes[col]
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- cell.cl_lines[line_index].utf8_length_or_length(),
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' ');
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} else {
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block_text.append(col_sizes[col], ' ');
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}
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col += 1;
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}
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block_text.append("\n")
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.append(lnav::roles::table_border(
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repeat("\u2550", full_width + col_sizes.size())))
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.append("\n");
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}
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for (const auto& row : tab.t_rows) {
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cells.clear();
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max_cell_lines = 0;
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for (size_t lpc = 0; lpc < row.r_columns.size(); lpc++) {
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tws.with_width(col_sizes[lpc]);
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attr_line_t td_block;
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td_block.append(row.r_columns[lpc], &tws);
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cells.emplace_back(td_block.rtrim().split_lines());
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if (cells.back().cl_lines.size() > max_cell_lines) {
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max_cell_lines = cells.back().cl_lines.size();
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}
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}
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for (size_t line_index = 0; line_index < max_cell_lines;
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line_index++) {
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size_t col = 0;
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for (const auto& cell : cells) {
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block_text.append(" ");
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if (line_index < cell.cl_lines.size()) {
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block_text.append(cell.cl_lines[line_index]);
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if (col < col_sizes.size() - 1) {
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block_text.append(
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col_sizes[col]
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- cell.cl_lines[line_index]
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.utf8_length_or_length(),
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' ');
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}
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} else if (col < col_sizes.size() - 1) {
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block_text.append(col_sizes[col], ' ');
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}
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col += 1;
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}
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block_text.append("\n");
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}
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}
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block_text.with_attr_for_all(SA_PREFORMATTED.value());
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last_block.append(block_text);
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} else if (bl.is<block_th>()) {
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this->ml_tables.back().t_headers.push_back(block_text);
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} else if (bl.is<MD_BLOCK_TD_DETAIL*>()) {
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this->ml_tables.back().t_rows.back().r_columns.push_back(block_text);
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} else {
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text_wrap_settings tws = {0, this->ml_blocks.size() == 1 ? 70 : 10000};
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if (!last_block.empty()) {
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last_block.append("\n");
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}
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last_block.append(block_text, &tws);
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}
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if (bl.is<block_doc>()) {
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this->flush_footnotes();
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}
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return Ok();
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}
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Result<void, std::string>
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md2attr_line::enter_span(const md4cpp::event_handler::span& sp)
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{
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auto& last_block = this->ml_blocks.back();
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this->ml_span_starts.push_back(last_block.length());
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if (sp.is<span_code>()) {
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last_block.append(" ");
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this->ml_code_depth += 1;
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}
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return Ok();
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}
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Result<void, std::string>
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md2attr_line::leave_span(const md4cpp::event_handler::span& sp)
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{
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auto& last_block = this->ml_blocks.back();
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if (sp.is<span_code>()) {
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this->ml_code_depth -= 1;
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last_block.append(" ");
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line_range lr{
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static_cast<int>(this->ml_span_starts.back()),
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static_cast<int>(last_block.length()),
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};
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last_block.with_attr({
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lr,
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VC_ROLE.value(role_t::VCR_QUOTED_CODE),
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});
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last_block.with_attr({
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lr,
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SA_PREFORMATTED.value(),
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});
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} else if (sp.is<span_em>()) {
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||
|
line_range lr{
|
||
|
static_cast<int>(this->ml_span_starts.back()),
|
||
|
static_cast<int>(last_block.length()),
|
||
|
};
|
||
|
last_block.with_attr({
|
||
|
lr,
|
||
|
VC_STYLE.value(A_ITALIC),
|
||
|
});
|
||
|
} else if (sp.is<span_strong>()) {
|
||
|
line_range lr{
|
||
|
static_cast<int>(this->ml_span_starts.back()),
|
||
|
static_cast<int>(last_block.length()),
|
||
|
};
|
||
|
last_block.with_attr({
|
||
|
lr,
|
||
|
VC_STYLE.value(A_BOLD),
|
||
|
});
|
||
|
} else if (sp.is<MD_SPAN_A_DETAIL*>()) {
|
||
|
auto* a_detail = sp.get<MD_SPAN_A_DETAIL*>();
|
||
|
auto href_str = std::string(a_detail->href.text, a_detail->href.size);
|
||
|
|
||
|
this->append_url_footnote(href_str);
|
||
|
} else if (sp.is<MD_SPAN_IMG_DETAIL*>()) {
|
||
|
auto* img_detail = sp.get<MD_SPAN_IMG_DETAIL*>();
|
||
|
auto src_str = std::string(img_detail->src.text, img_detail->src.size);
|
||
|
|
||
|
this->append_url_footnote(src_str);
|
||
|
}
|
||
|
this->ml_span_starts.pop_back();
|
||
|
return Ok();
|
||
|
}
|
||
|
|
||
|
Result<void, std::string>
|
||
|
md2attr_line::text(MD_TEXTTYPE tt, const string_fragment& sf)
|
||
|
{
|
||
|
static const auto& entity_map = md4cpp::get_xml_entity_map();
|
||
|
|
||
|
auto& last_block = this->ml_blocks.back();
|
||
|
|
||
|
switch (tt) {
|
||
|
case MD_TEXT_BR:
|
||
|
last_block.append("\n");
|
||
|
break;
|
||
|
case MD_TEXT_SOFTBR: {
|
||
|
if (!last_block.empty() && !isspace(last_block.get_string().back()))
|
||
|
{
|
||
|
last_block.append(" ");
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
case MD_TEXT_ENTITY: {
|
||
|
auto xe_iter = entity_map.xem_entities.find(sf.to_string());
|
||
|
|
||
|
if (xe_iter != entity_map.xem_entities.end()) {
|
||
|
last_block.append(xe_iter->second.xe_chars);
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
default: {
|
||
|
static const pcrepp REPL_RE(R"(-{2,3}|:[^:\s]*(?:::[^:\s]*)*:)");
|
||
|
static const auto& emojis = md4cpp::get_emoji_map();
|
||
|
|
||
|
if (this->ml_code_depth > 0) {
|
||
|
last_block.append(sf);
|
||
|
return Ok();
|
||
|
}
|
||
|
|
||
|
pcre_input pi(sf);
|
||
|
pcre_context_static<30> pc;
|
||
|
|
||
|
while (REPL_RE.match(pc, pi)) {
|
||
|
auto prev = string_fragment{
|
||
|
sf.sf_string,
|
||
|
(int) pi.pi_offset,
|
||
|
pc.all()->c_begin,
|
||
|
};
|
||
|
|
||
|
last_block.append(prev);
|
||
|
|
||
|
auto matched = pi.get_string_fragment(pc.all());
|
||
|
|
||
|
if (matched == "--") {
|
||
|
last_block.append("\u2013");
|
||
|
} else if (matched == "---") {
|
||
|
last_block.append("\u2014");
|
||
|
} else if (matched.startswith(":")) {
|
||
|
auto em_iter
|
||
|
= emojis.em_shortname2emoji.find(matched.to_string());
|
||
|
if (em_iter == emojis.em_shortname2emoji.end()) {
|
||
|
last_block.append(matched);
|
||
|
} else {
|
||
|
last_block.append(em_iter->second.get().e_value);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
this->ml_blocks.back().append(string_fragment{
|
||
|
sf.sf_string,
|
||
|
(int) pi.pi_offset,
|
||
|
sf.sf_end,
|
||
|
});
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
return Ok();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
md2attr_line::append_url_footnote(std::string href_str)
|
||
|
{
|
||
|
if (startswith(href_str, "#")) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
auto& last_block = this->ml_blocks.back();
|
||
|
last_block.append(FMT_STRING("[{}]"), this->ml_footnotes.size() + 1);
|
||
|
last_block.with_attr(string_attr{
|
||
|
line_range{
|
||
|
(int) this->ml_span_starts.back(),
|
||
|
(int) last_block.length(),
|
||
|
},
|
||
|
VC_STYLE.value(A_UNDERLINE),
|
||
|
});
|
||
|
if (this->ml_source_path && href_str.find(":") == std::string::npos) {
|
||
|
auto link_path = ghc::filesystem::absolute(
|
||
|
this->ml_source_path.value().parent_path() / href_str);
|
||
|
|
||
|
href_str = fmt::format(FMT_STRING("file://{}"), link_path.string());
|
||
|
}
|
||
|
|
||
|
auto href
|
||
|
= attr_line_t().append(lnav::roles::hyperlink(href_str)).append(" ");
|
||
|
href.with_attr_for_all(VC_ROLE.value(role_t::VCR_FOOTNOTE_TEXT));
|
||
|
href.with_attr_for_all(SA_PREFORMATTED.value());
|
||
|
this->ml_footnotes.emplace_back(href);
|
||
|
}
|