author | František Kučera <franta-hg@frantovo.cz> |
Fri, 01 Jul 2022 22:56:30 +0200 | |
branch | v_0 |
changeset 39 | f33464965693 |
parent 38 | 2cc2d3f658f4 |
child 40 | 59f3cb26bfe7 |
permissions | -rw-r--r-- |
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/** |
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* Relational pipes |
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* Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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fix license version: GNU GPLv3
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* the Free Software Foundation, version 3 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include <string> |
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#include <vector> |
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#include <iostream> |
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#include <sstream> |
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#include <locale> |
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#include <codecvt> |
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#include <regex> |
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#include <relpipe/reader/typedefs.h> |
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#include <relpipe/reader/TypeId.h> |
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#include <relpipe/reader/handlers/RelationalReaderStringHandler.h> |
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#include <relpipe/reader/handlers/AttributeMetadata.h> |
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#include <relpipe/reader/RelpipeReaderException.h> |
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#include "Configuration.h" |
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namespace relpipe { |
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namespace out { |
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namespace tabular { |
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using namespace relpipe::reader; |
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class TabularPrefetchingHandler : public handlers::RelationalReaderStringHandler { |
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private: |
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class ColorScheme { |
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}; |
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std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings. |
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const char* ESC_BRIGHT = "\u001b[1m"; |
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const char* ESC_RED = "\u001b[31m"; |
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const char* ESC_GREEN = "\u001b[32m"; |
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const char* ESC_YELLOW = "\u001b[33m"; |
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const char* ESC_CYAN = "\u001b[36m"; |
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const char* ESC_RESET = "\u001b[0m"; |
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const char* ESC_HEADER = ESC_BRIGHT; |
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const char* ESC_BORDER = ESC_GREEN; |
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const char* ESC_VALUE = ESC_CYAN; |
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const char* ESC_RELATION = ESC_RED; |
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const char* ESC_REPLACEMENT = ESC_RED; |
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const char* ESC_COUNT = ESC_YELLOW; |
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const char* INDENT = " "; // table indent from the left |
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std::ostream& output; |
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Configuration& configuration; |
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RelationConfiguration* currentRelationConfiguration; |
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#define getConfiguration(option) (currentRelationConfiguration ? currentRelationConfiguration->option : configuration.option) |
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std::vector<TypeId> columnTypes; |
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std::vector<string_t> columnTypeCodes; |
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std::vector<string_t> columnNames; |
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std::vector<integer_t> columnWidths; |
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std::vector<string_t> values; // all values are saved here and processed at the end of the relation |
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integer_t columnCount = 0; |
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const string_t colorizeReplacement(const string_t &replacement, const char* valueColor) { |
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return convertor.from_bytes(ESC_RESET) + convertor.from_bytes(ESC_REPLACEMENT) + replacement + convertor.from_bytes(ESC_RESET) + convertor.from_bytes(valueColor); |
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} |
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/** |
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* Sanitizes whitespace that could broke table layout. |
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* |
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* TODO: sanitize also escape sequences and emoji (resp. properly measure their width) |
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* |
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* @param value original value |
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* @param color value foreground color |
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* @return value with replaced whitespaces |
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*/ |
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const string_t formatValue(const string_t &value, const char* color) { |
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std::wstringstream result; |
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result << convertor.from_bytes(color); |
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for (auto & ch : value) { |
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// see computeWidth below |
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switch (ch) { |
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case L'\n': result << colorizeReplacement(L"↲", color); |
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break; |
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case L'\r': result << colorizeReplacement(L"⏎", color); |
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break; |
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case L'\t': result << colorizeReplacement(L"↹", color); |
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break; |
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case L' ': result << colorizeReplacement(L"⎵", color); |
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break; |
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case L'\a': result << colorizeReplacement(L"*", color); // 🔔 ␇ |
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break; |
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case L'\b': result << colorizeReplacement(L"←", color); // ␈ |
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break; |
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case L'\e': result << colorizeReplacement(L"ESC", color); // ␛ |
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111 |
break; |
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default: result << ch; |
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} |
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} |
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result << convertor.from_bytes(ESC_RESET); |
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return result.str(); |
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} |
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/** |
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* @param stringValue |
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123 |
* @return the width that would the string occupy on the display (particular characters might be wider than 1 column) |
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124 |
*/ |
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125 |
integer_t computeWidth(const string_t& stringValue) { |
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126 |
integer_t width = 0; |
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|
127 |
for (wchar_t ch : stringValue) { |
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|
128 |
// see formatValue() above |
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129 |
switch (ch) { |
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130 |
case L'\n': |
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131 |
case L'\r': |
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132 |
case L'\t': |
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|
133 |
case L' ': |
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|
134 |
case L'\a': |
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|
135 |
case L'\b': |
27
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|
136 |
width += 1; |
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|
137 |
break; |
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|
138 |
case L'\e': |
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|
139 |
width += 3; |
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|
140 |
break; |
27
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|
141 |
default: |
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|
142 |
width += std::max(0, wcwidth(ch)); |
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|
143 |
} |
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|
144 |
} |
26
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|
145 |
return width; |
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|
146 |
} |
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|
147 |
|
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|
148 |
void printHorizontalLine(const string_t& left, const string_t& middle, const string_t& right, const string_t& bar) { |
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|
149 |
output << INDENT << ESC_BORDER; |
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|
150 |
output << convertor.to_bytes(left); |
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|
151 |
for (size_t c = 0; c < columnCount; c++) { |
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|
152 |
integer_t width = columnWidths[c]; |
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|
153 |
for (integer_t w = 0; w < (width + 2); w++) output << convertor.to_bytes(bar); // 2 = left and right padding of the value |
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|
154 |
if (c < (columnCount - 1)) output << convertor.to_bytes(middle); |
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|
155 |
} |
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|
156 |
output << convertor.to_bytes(right); |
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|
157 |
output << ESC_RESET << std::endl; |
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|
158 |
|
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|
159 |
} |
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|
160 |
|
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|
161 |
void printCachedData() { |
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|
162 |
// Compute column widths and paddings: |
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|
163 |
vector<integer_t> paddings(columnCount); |
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|
164 |
for (size_t i = 0; i < columnCount; i++) { |
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|
165 |
string_t typeCode = columnTypeCodes[i]; |
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|
166 |
string_t columnName = columnNames[i]; |
31
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|
167 |
integer_t minWidth = columnName.size() + (getConfiguration(writeTypes) ? typeCode.size() + 3 : 0); // 3 = " ()" in "columnName (typeCode)" |
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|
168 |
columnWidths[i] = max(columnWidths[i], minWidth); |
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|
169 |
paddings[i] = columnWidths[i] - minWidth; |
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|
170 |
} |
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|
171 |
|
38
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diff
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|
172 |
if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"╭", L"┬", L"╮", L"─"); |
2cc2d3f658f4
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František Kučera <franta-hg@frantovo.cz>
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|
173 |
else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"┌", L"┬", L"┐", L"─"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
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diff
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|
174 |
else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╔", L"╦", L"╗", L"═"); |
2cc2d3f658f4
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František Kučera <franta-hg@frantovo.cz>
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|
175 |
else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
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|
176 |
else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-"); |
2cc2d3f658f4
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František Kučera <franta-hg@frantovo.cz>
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|
177 |
else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle)); |
2cc2d3f658f4
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|
178 |
|
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|
179 |
std::string verticalSeparator; |
2cc2d3f658f4
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|
180 |
if (configuration.tableStyle == Configuration::TableStyle::Rounded) verticalSeparator = "│"; |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
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|
181 |
else if (configuration.tableStyle == Configuration::TableStyle::Sharp) verticalSeparator = "│"; |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
182 |
else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) verticalSeparator = "║"; |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
183 |
else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) verticalSeparator = " "; |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
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diff
changeset
|
184 |
else if (configuration.tableStyle == Configuration::TableStyle::Ascii) verticalSeparator = "|"; |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
185 |
else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle)); |
5
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tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
186 |
|
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
187 |
// Print column headers: |
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
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changeset
|
188 |
output << INDENT << ESC_BORDER << verticalSeparator << ESC_RESET; |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
189 |
for (size_t i = 0; i < columnCount; i++) { |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
190 |
output << " " << convertor.to_bytes(formatValue(columnNames[i], ESC_HEADER)); |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
191 |
for (integer_t p = 0; p < paddings[i]; p++) { |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
192 |
output << " "; |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
193 |
} |
31
c22577615ce4
rename: --print-types, --print-relation-name, --print-record-count to --write-types, --write-relation-name, --write-record-count
František Kučera <franta-hg@frantovo.cz>
parents:
30
diff
changeset
|
194 |
if (getConfiguration(writeTypes)) output << " (" << convertor.to_bytes(columnTypeCodes[i]) << ")"; |
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
195 |
output << ESC_BORDER << " " << verticalSeparator << ESC_RESET; |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
196 |
} |
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tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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changeset
|
197 |
output << std::endl; |
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
198 |
if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"├", L"┼", L"┤", L"─"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
199 |
else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"├", L"┼", L"┤", L"─"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
200 |
else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╠", L"╬", L"╣", L"═"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
201 |
else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
202 |
else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-"); |
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
203 |
else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle)); |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
204 |
|
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tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
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changeset
|
205 |
// Print particular rows: |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
206 |
for (size_t i = 0; i < values.size(); i++) { |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
207 |
integer_t columnIndex = i % columnCount; |
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
208 |
if (columnIndex == 0) output << INDENT << ESC_BORDER << verticalSeparator << ESC_RESET; |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
209 |
string_t stringValue = values[i]; |
26
32824e833b89
compute proper width of strings (characters might be wider than 1 column on display)
František Kučera <franta-hg@frantovo.cz>
parents:
24
diff
changeset
|
210 |
integer_t padding = columnWidths[columnIndex] - computeWidth(stringValue); |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
211 |
boolean_t alignRight = columnTypes[columnIndex] == TypeId::BOOLEAN || columnTypes[columnIndex] == TypeId::INTEGER; |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
212 |
|
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
213 |
if (alignRight) for (integer_t p = 0; p < padding; p++) output << " "; |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
214 |
output << " " << convertor.to_bytes(formatValue(stringValue, ESC_VALUE)); |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
215 |
if (!alignRight) for (integer_t p = 0; p < padding; p++) output << " "; |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
216 |
|
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
217 |
output << ESC_BORDER << " " << verticalSeparator << ESC_RESET; |
5
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
218 |
if (columnIndex == (columnCount - 1)) output << std::endl; |
911ec74cce33
tabular handler, based on the prototype code
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
219 |
} |
38
2cc2d3f658f4
configurable table style: rounded, sharp, sharp-double, horizontal-only, ascii
František Kučera <franta-hg@frantovo.cz>
parents:
37
diff
changeset
|
220 |
if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"╰", L"┴", L"╯", L"─"); |
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else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"└", L"┴", L"┘", L"─"); |
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else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╚", L"╩", L"╝", L"═"); |
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else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─"); |
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else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-"); |
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else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle)); |
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if (getConfiguration(writeRecordCount)) { |
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integer_t recordCount = values.size() / columnCount; |
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output << ESC_COUNT << "Record count: " << ESC_RESET << recordCount << std::endl; |
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} |
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values.clear(); |
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} |
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|
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public: |
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|
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TabularPrefetchingHandler(std::ostream& output, Configuration& configuration) : output(output), configuration(configuration) { |
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} |
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|
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void startRelation(string_t name, std::vector<handlers::AttributeMetadata> attributes) override { |
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if (columnCount) printCachedData(); |
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|
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currentRelationConfiguration = nullptr; |
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for (int i = 0; i < configuration.relationConfigurations.size(); i++) { |
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if (std::regex_match(name, std::wregex(configuration.relationConfigurations[i].relation))) { |
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currentRelationConfiguration = &configuration.relationConfigurations[i]; |
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break; // it there are multiple matches, only the first configuration is used |
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} |
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} |
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|
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if (getConfiguration(writeRelationName)) output << ESC_RELATION << convertor.to_bytes(name) << ":" << ESC_RESET << endl; |
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columnCount = attributes.size(); |
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columnTypes.resize(columnCount); |
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columnTypeCodes.resize(columnCount); |
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columnNames.resize(columnCount); |
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columnWidths.resize(columnCount, 0); |
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fill(columnWidths.begin(), columnWidths.end(), 0); |
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for (int i = 0; i < attributes.size(); i++) { |
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columnNames[i] = attributes[i].getAttributeName(); |
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columnTypes[i] = attributes[i].getTypeId(); |
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columnTypeCodes[i] = attributes[i].getTypeName(); |
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} |
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} |
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void attribute(const string_t& value) override { |
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integer_t i = values.size() % columnCount; |
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values.push_back(value); |
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columnWidths[i] = max(columnWidths[i], computeWidth(value)); |
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} |
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void endOfPipe() { |
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if (columnCount) printCachedData(); |
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} |
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}; |
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|
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#undef getConfiguration |
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|
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} |
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} |
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} |