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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#include <catch2/internal/catch_textflow.hpp>
#include <cstring>
#include <ostream>
namespace {
bool isWhitespace( char c ) {
return c == ' ' || c == '\t' || c == '\n' || c == '\r';
}
bool isBreakableBefore( char c ) {
static const char chars[] = "[({<|";
return std::memchr( chars, c, sizeof( chars ) - 1 ) != nullptr;
}
bool isBreakableAfter( char c ) {
static const char chars[] = "])}>.,:;*+-=&/\\";
return std::memchr( chars, c, sizeof( chars ) - 1 ) != nullptr;
}
bool isBoundary( std::string const& line, size_t at ) {
assert( at > 0 );
assert( at <= line.size() );
return at == line.size() ||
( isWhitespace( line[at] ) && !isWhitespace( line[at - 1] ) ) ||
isBreakableBefore( line[at] ) ||
isBreakableAfter( line[at - 1] );
}
} // namespace
namespace Catch {
namespace TextFlow {
void Column::iterator::calcLength() {
m_suffix = false;
auto width = m_column.m_width - indent();
m_end = m_pos;
std::string const& current_line = m_column.m_string;
if ( current_line[m_pos] == '\n' ) {
++m_end;
}
while ( m_end < current_line.size() &&
current_line[m_end] != '\n' ) {
++m_end;
}
if ( m_end < m_pos + width ) {
m_len = m_end - m_pos;
} else {
size_t len = width;
while ( len > 0 && !isBoundary( current_line, m_pos + len ) ) {
--len;
}
while ( len > 0 &&
isWhitespace( current_line[m_pos + len - 1] ) ) {
--len;
}
if ( len > 0 ) {
m_len = len;
} else {
m_suffix = true;
m_len = width - 1;
}
}
}
size_t Column::iterator::indent() const {
auto initial =
m_pos == 0 ? m_column.m_initialIndent : std::string::npos;
return initial == std::string::npos ? m_column.m_indent : initial;
}
std::string
Column::iterator::addIndentAndSuffix( size_t position,
size_t length ) const {
std::string ret;
const auto desired_indent = indent();
ret.reserve( desired_indent + length + m_suffix );
ret.append( desired_indent, ' ' );
ret.append( m_column.m_string, position, length );
if ( m_suffix ) {
ret.push_back( '-' );
}
return ret;
}
Column::iterator::iterator( Column const& column ): m_column( column ) {
assert( m_column.m_width > m_column.m_indent );
assert( m_column.m_initialIndent == std::string::npos ||
m_column.m_width > m_column.m_initialIndent );
calcLength();
if ( m_len == 0 ) {
m_pos = m_column.m_string.size();
}
}
std::string Column::iterator::operator*() const {
assert( m_pos <= m_end );
return addIndentAndSuffix( m_pos, m_len );
}
Column::iterator& Column::iterator::operator++() {
m_pos += m_len;
std::string const& current_line = m_column.m_string;
if ( m_pos < current_line.size() && current_line[m_pos] == '\n' ) {
m_pos += 1;
} else {
while ( m_pos < current_line.size() &&
isWhitespace( current_line[m_pos] ) ) {
++m_pos;
}
}
if ( m_pos != current_line.size() ) {
calcLength();
}
return *this;
}
Column::iterator Column::iterator::operator++( int ) {
iterator prev( *this );
operator++();
return prev;
}
std::ostream& operator<<( std::ostream& os, Column const& col ) {
bool first = true;
for ( auto line : col ) {
if ( first ) {
first = false;
} else {
os << '\n';
}
os << line;
}
return os;
}
Column Spacer( size_t spaceWidth ) {
Column ret{ "" };
ret.width( spaceWidth );
return ret;
}
Columns::iterator::iterator( Columns const& columns, EndTag ):
m_columns( columns.m_columns ), m_activeIterators( 0 ) {
m_iterators.reserve( m_columns.size() );
for ( auto const& col : m_columns ) {
m_iterators.push_back( col.end() );
}
}
Columns::iterator::iterator( Columns const& columns ):
m_columns( columns.m_columns ),
m_activeIterators( m_columns.size() ) {
m_iterators.reserve( m_columns.size() );
for ( auto const& col : m_columns ) {
m_iterators.push_back( col.begin() );
}
}
std::string Columns::iterator::operator*() const {
std::string row, padding;
for ( size_t i = 0; i < m_columns.size(); ++i ) {
const auto width = m_columns[i].width();
if ( m_iterators[i] != m_columns[i].end() ) {
std::string col = *m_iterators[i];
row += padding;
row += col;
padding.clear();
if ( col.size() < width ) {
padding.append( width - col.size(), ' ' );
}
} else {
padding.append( width, ' ' );
}
}
return row;
}
Columns::iterator& Columns::iterator::operator++() {
for ( size_t i = 0; i < m_columns.size(); ++i ) {
if ( m_iterators[i] != m_columns[i].end() ) {
++m_iterators[i];
}
}
return *this;
}
Columns::iterator Columns::iterator::operator++( int ) {
iterator prev( *this );
operator++();
return prev;
}
std::ostream& operator<<( std::ostream& os, Columns const& cols ) {
bool first = true;
for ( auto line : cols ) {
if ( first ) {
first = false;
} else {
os << '\n';
}
os << line;
}
return os;
}
Columns Column::operator+( Column const& other ) {
Columns cols;
cols += *this;
cols += other;
return cols;
}
Columns& Columns::operator+=( Column const& col ) {
m_columns.push_back( col );
return *this;
}
Columns Columns::operator+( Column const& col ) {
Columns combined = *this;
combined += col;
return combined;
}
} // namespace TextFlow
} // namespace Catch
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