author | František Kučera <franta-hg@frantovo.cz> |
Wed, 07 Oct 2020 16:42:37 +0200 | |
branch | v_0 |
changeset 31 | c22577615ce4 |
parent 30 | 3c6374467a82 |
child 36 | 3b75b9f38abc |
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 "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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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_REPLACEMENT = ESC_RED; |
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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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default: result << ch; |
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100 |
} |
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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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106 |
} |
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/** |
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* @param stringValue |
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* @return the width that would the string occupy on the display (particular characters might be wider than 1 column) |
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*/ |
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integer_t computeWidth(const string_t& stringValue) { |
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integer_t width = 0; |
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for (wchar_t ch : stringValue) { |
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// see formatValue() above |
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switch (ch) { |
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case L'\n': |
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case L'\r': |
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case L'\t': |
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case L' ': |
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121 |
width += 1; |
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122 |
break; |
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123 |
default: |
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124 |
width += std::max(0, wcwidth(ch)); |
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125 |
} |
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126 |
} |
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127 |
return width; |
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128 |
} |
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129 |
|
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130 |
void printHorizontalLine(const string_t &left, const string_t &middle, const string_t &right) { |
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131 |
const string_t bar = L"─"; |
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132 |
// TODO: support also ASCII nostalgia: |
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133 |
// border = border.replaceAll("─", "-"); |
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134 |
// border = border.replaceAll("│", "|"); |
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135 |
// border = border.replaceAll("[╭┬╮├┼┤╰┴╯]", "+"); |
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136 |
|
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137 |
output << INDENT << ESC_BORDER; |
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138 |
output << convertor.to_bytes(left); |
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139 |
for (size_t c = 0; c < columnCount; c++) { |
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140 |
integer_t width = columnWidths[c]; |
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141 |
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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142 |
if (c < (columnCount - 1)) output << convertor.to_bytes(middle); |
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143 |
} |
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144 |
output << convertor.to_bytes(right); |
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145 |
output << ESC_RESET << std::endl; |
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146 |
|
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147 |
} |
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148 |
|
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149 |
void printCachedData() { |
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150 |
// Compute column widths and paddings: |
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|
151 |
vector<integer_t> paddings(columnCount); |
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|
152 |
for (size_t i = 0; i < columnCount; i++) { |
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153 |
string_t typeCode = columnTypeCodes[i]; |
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154 |
string_t columnName = columnNames[i]; |
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|
155 |
integer_t minWidth = columnName.size() + (getConfiguration(writeTypes) ? typeCode.size() + 3 : 0); // 3 = " ()" in "columnName (typeCode)" |
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|
156 |
columnWidths[i] = max(columnWidths[i], minWidth); |
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157 |
paddings[i] = columnWidths[i] - minWidth; |
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158 |
} |
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|
159 |
|
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|
160 |
printHorizontalLine(L"╭", L"┬", L"╮"); |
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|
161 |
|
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|
162 |
// Print column headers: |
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|
163 |
output << INDENT << ESC_BORDER << "│" << ESC_RESET; |
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|
164 |
for (size_t i = 0; i < columnCount; i++) { |
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|
165 |
output << " " << convertor.to_bytes(formatValue(columnNames[i], ESC_HEADER)); |
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|
166 |
for (integer_t p = 0; p < paddings[i]; p++) { |
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|
167 |
output << " "; |
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|
168 |
} |
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|
169 |
if (getConfiguration(writeTypes)) output << " (" << convertor.to_bytes(columnTypeCodes[i]) << ")"; |
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|
170 |
output << ESC_BORDER << " │" << ESC_RESET; |
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|
171 |
} |
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|
172 |
output << std::endl; |
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|
173 |
printHorizontalLine(L"├", L"┼", L"┤"); |
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|
174 |
|
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|
175 |
// Print particular rows: |
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|
176 |
for (size_t i = 0; i < values.size(); i++) { |
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|
177 |
integer_t columnIndex = i % columnCount; |
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|
178 |
if (columnIndex == 0) output << INDENT << ESC_BORDER << "│" << ESC_RESET; |
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|
179 |
string_t stringValue = values[i]; |
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|
180 |
integer_t padding = columnWidths[columnIndex] - computeWidth(stringValue); |
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|
181 |
boolean_t alignRight = columnTypes[columnIndex] == TypeId::BOOLEAN || columnTypes[columnIndex] == TypeId::INTEGER; |
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|
182 |
|
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|
183 |
if (alignRight) for (integer_t p = 0; p < padding; p++) output << " "; |
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|
184 |
output << " " << convertor.to_bytes(formatValue(stringValue, ESC_VALUE)); |
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|
185 |
if (!alignRight) for (integer_t p = 0; p < padding; p++) output << " "; |
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changeset
|
186 |
|
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|
187 |
output << ESC_BORDER << " │" << ESC_RESET; |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
188 |
if (columnIndex == (columnCount - 1)) output << std::endl; |
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|
189 |
} |
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|
190 |
printHorizontalLine(L"╰", L"┴", L"╯"); |
30
3c6374467a82
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diff
changeset
|
191 |
|
31
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František Kučera <franta-hg@frantovo.cz>
parents:
30
diff
changeset
|
192 |
if (getConfiguration(writeRecordCount)) { |
30
3c6374467a82
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27
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changeset
|
193 |
integer_t recordCount = values.size() / columnCount; |
3c6374467a82
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František Kučera <franta-hg@frantovo.cz>
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27
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changeset
|
194 |
output << ESC_YELLOW << "Record count: " << ESC_RESET << recordCount << std::endl; |
3c6374467a82
change CLI interface: options: --relation --print-types --print-relation-name --print-record-count
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|
195 |
} |
5
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|
196 |
|
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|
197 |
values.clear(); |
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|
198 |
} |
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|
199 |
|
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changeset
|
200 |
public: |
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changeset
|
201 |
|
30
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27
diff
changeset
|
202 |
TabularPrefetchingHandler(std::ostream& output, Configuration& configuration) : output(output), configuration(configuration) { |
5
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|
203 |
} |
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changeset
|
204 |
|
6
fc1e746e26a5
use AttributeMetadata instead of std::pair for relation header
František Kučera <franta-hg@frantovo.cz>
parents:
5
diff
changeset
|
205 |
void startRelation(string_t name, std::vector<handlers::AttributeMetadata> attributes) override { |
5
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František Kučera <franta-hg@frantovo.cz>
parents:
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|
206 |
if (columnCount) printCachedData(); |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
207 |
|
30
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change CLI interface: options: --relation --print-types --print-relation-name --print-record-count
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27
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changeset
|
208 |
currentRelationConfiguration = nullptr; |
3c6374467a82
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
209 |
for (int i = 0; i < configuration.relationConfigurations.size(); i++) { |
3c6374467a82
change CLI interface: options: --relation --print-types --print-relation-name --print-record-count
František Kučera <franta-hg@frantovo.cz>
parents:
27
diff
changeset
|
210 |
if (std::regex_match(name, std::wregex(configuration.relationConfigurations[i].relation))) { |
3c6374467a82
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František Kučera <franta-hg@frantovo.cz>
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27
diff
changeset
|
211 |
currentRelationConfiguration = &configuration.relationConfigurations[i]; |
3c6374467a82
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František Kučera <franta-hg@frantovo.cz>
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27
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changeset
|
212 |
break; // it there are multiple matches, only the first configuration is used |
3c6374467a82
change CLI interface: options: --relation --print-types --print-relation-name --print-record-count
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changeset
|
213 |
} |
3c6374467a82
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changeset
|
214 |
} |
3c6374467a82
change CLI interface: options: --relation --print-types --print-relation-name --print-record-count
František Kučera <franta-hg@frantovo.cz>
parents:
27
diff
changeset
|
215 |
|
31
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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
|
216 |
if (getConfiguration(writeRelationName)) output << ESC_RED << convertor.to_bytes(name) << ":" << ESC_RESET << endl; |
5
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|
217 |
columnCount = attributes.size(); |
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|
218 |
columnTypes.resize(columnCount); |
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|
219 |
columnTypeCodes.resize(columnCount); |
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|
220 |
columnNames.resize(columnCount); |
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František Kučera <franta-hg@frantovo.cz>
parents:
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changeset
|
221 |
columnWidths.resize(columnCount, 0); |
13
3435efcaa8ca
fix table width: reset widths to 0
František Kučera <franta-hg@frantovo.cz>
parents:
9
diff
changeset
|
222 |
fill(columnWidths.begin(), columnWidths.end(), 0); |
5
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
223 |
for (int i = 0; i < attributes.size(); i++) { |
7
2057919937fa
AttributeMetadata: pImpl / d-pointer version but with memory-leak and unwanted empty constructor
František Kučera <franta-hg@frantovo.cz>
parents:
6
diff
changeset
|
224 |
columnNames[i] = attributes[i].getAttributeName(); |
2057919937fa
AttributeMetadata: pImpl / d-pointer version but with memory-leak and unwanted empty constructor
František Kučera <franta-hg@frantovo.cz>
parents:
6
diff
changeset
|
225 |
columnTypes[i] = attributes[i].getTypeId(); |
2057919937fa
AttributeMetadata: pImpl / d-pointer version but with memory-leak and unwanted empty constructor
František Kučera <franta-hg@frantovo.cz>
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changeset
|
226 |
columnTypeCodes[i] = attributes[i].getTypeName(); |
5
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|
227 |
} |
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|
228 |
} |
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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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#undef getConfiguration |
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} |
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} |
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} |