Mercurial Repositories > eric / file comparison
comparison: eric6/Plugins/VcsPlugins/vcsGit/GitDiffHighlighter.py
eric6/Plugins/VcsPlugins/vcsGit/GitDiffHighlighter.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7192
- a22eee00b052
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2015 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a syntax highlighter for diff outputs. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 import re | |
| 13 | |
| 14 from PyQt5.QtGui import QSyntaxHighlighter, QColor, QTextCharFormat, QFont | |
| 15 | |
| 16 import Preferences | |
| 17 | |
| 18 try: | |
| 19 from E5Gui.E5GenericDiffHighlighter import TERMINAL, \ | |
| 20 E5GenericDiffHighlighter | |
| 21 except ImportError: | |
| 22 def TERMINAL(pattern): | |
| 23 """ | |
| 24 Function to mark a pattern as the final one to search for. | |
| 25 | |
| 26 @param pattern pattern to be marked (string) | |
| 27 @return marked pattern (string) | |
| 28 """ | |
| 29 return "__TERMINAL__:{0}".format(pattern) | |
| 30 | |
| 31 # Cache the results of re.compile for performance reasons | |
| 32 _REGEX_CACHE = {} | |
| 33 | |
| 34 class E5GenericDiffHighlighter(QSyntaxHighlighter): | |
| 35 """ | |
| 36 Class implementing a generic diff highlighter. | |
| 37 """ | |
| 38 def __init__(self, doc): | |
| 39 """ | |
| 40 Constructor | |
| 41 | |
| 42 @param doc reference to the text document (QTextDocument) | |
| 43 """ | |
| 44 super(E5GenericDiffHighlighter, self).__init__(doc) | |
| 45 | |
| 46 self.textColor = QColor(0, 0, 0) | |
| 47 self.addedColor = QColor(190, 237, 190) | |
| 48 self.removedColor = QColor(237, 190, 190) | |
| 49 self.replacedColor = QColor(190, 190, 237) | |
| 50 self.contextColor = QColor(255, 220, 168) | |
| 51 self.headerColor = QColor(237, 237, 190) | |
| 52 | |
| 53 self.normalFormat = self.makeFormat() | |
| 54 | |
| 55 self._rules = [] | |
| 56 self.generateRules() | |
| 57 | |
| 58 def generateRules(self): | |
| 59 """ | |
| 60 Public method to generate the rule set. | |
| 61 | |
| 62 Note: This method must me implemented by derived syntax | |
| 63 highlighters. | |
| 64 """ | |
| 65 pass | |
| 66 | |
| 67 def createRules(self, *rules): | |
| 68 """ | |
| 69 Public method to create the highlighting rules. | |
| 70 | |
| 71 @param rules set of highlighting rules (list of tuples of rule | |
| 72 pattern (string) and highlighting format (QTextCharFormat)) | |
| 73 """ | |
| 74 for ruleFormat in rules: | |
| 75 rule, formats = ruleFormat | |
| 76 terminal = rule.startswith(TERMINAL('')) | |
| 77 if terminal: | |
| 78 rule = rule[len(TERMINAL('')):] | |
| 79 try: | |
| 80 regex = _REGEX_CACHE[rule] | |
| 81 except KeyError: | |
| 82 regex = _REGEX_CACHE[rule] = re.compile(rule) | |
| 83 self._rules.append((regex, formats, terminal)) | |
| 84 | |
| 85 def formats(self, line): | |
| 86 """ | |
| 87 Public method to determine the highlighting formats for a line of | |
| 88 text. | |
| 89 | |
| 90 @param line text line to be highlighted (string) | |
| 91 @return list of matched highlighting rules (list of tuples of match | |
| 92 object and format (QTextCharFormat)) | |
| 93 """ | |
| 94 matched = [] | |
| 95 for rx, formats, terminal in self._rules: | |
| 96 match = rx.match(line) | |
| 97 if not match: | |
| 98 continue | |
| 99 matched.append([match, formats]) | |
| 100 if terminal: | |
| 101 return matched | |
| 102 | |
| 103 return matched | |
| 104 | |
| 105 def makeFormat(self, fg=None, bg=None, bold=False): | |
| 106 """ | |
| 107 Public method to generate a format definition. | |
| 108 | |
| 109 @param fg foreground color (QColor) | |
| 110 @param bg background color (QColor) | |
| 111 @param bold flag indicating bold text (boolean) | |
| 112 @return format definiton (QTextCharFormat) | |
| 113 """ | |
| 114 font = Preferences.getEditorOtherFonts("MonospacedFont") | |
| 115 charFormat = QTextCharFormat() | |
| 116 charFormat.setFontFamily(font.family()) | |
| 117 charFormat.setFontPointSize(font.pointSize()) | |
| 118 | |
| 119 if fg: | |
| 120 charFormat.setForeground(fg) | |
| 121 | |
| 122 if bg: | |
| 123 charFormat.setBackground(bg) | |
| 124 | |
| 125 if bold: | |
| 126 charFormat.setFontWeight(QFont.Bold) | |
| 127 | |
| 128 return charFormat | |
| 129 | |
| 130 def highlightBlock(self, text): | |
| 131 """ | |
| 132 Public method to highlight a block of text. | |
| 133 | |
| 134 @param text text to be highlighted (string) | |
| 135 """ | |
| 136 formats = self.formats(text) | |
| 137 if not formats: | |
| 138 # nothing matched | |
| 139 self.setFormat(0, len(text), self.normalFormat) | |
| 140 return | |
| 141 | |
| 142 for match, charFormat in formats: | |
| 143 start = match.start() | |
| 144 groups = match.groups() | |
| 145 | |
| 146 # No groups in the regex, assume this is a single rule | |
| 147 # that spans the entire line | |
| 148 if not groups: | |
| 149 self.setFormat(0, len(text), charFormat) | |
| 150 continue | |
| 151 | |
| 152 # Groups exist, rule is a tuple corresponding to group | |
| 153 for groupIndex, group in enumerate(groups): | |
| 154 if not group: | |
| 155 # empty match | |
| 156 continue | |
| 157 | |
| 158 # allow None as a no-op format | |
| 159 length = len(group) | |
| 160 if charFormat[groupIndex]: | |
| 161 self.setFormat(start, start + length, | |
| 162 charFormat[groupIndex]) | |
| 163 start += length | |
| 164 | |
| 165 | |
| 166 class GitDiffHighlighter(E5GenericDiffHighlighter): | |
| 167 """ | |
| 168 Class implementing a diff highlighter for Git. | |
| 169 """ | |
| 170 def __init__(self, doc, whitespace=True): | |
| 171 """ | |
| 172 Constructor | |
| 173 | |
| 174 @param doc reference to the text document (QTextDocument) | |
| 175 @param whitespace flag indicating to highlight whitespace | |
| 176 at the end of a line (boolean) | |
| 177 """ | |
| 178 self.whitespace = whitespace | |
| 179 | |
| 180 super(GitDiffHighlighter, self).__init__(doc) | |
| 181 | |
| 182 def generateRules(self): | |
| 183 """ | |
| 184 Public method to generate the rule set. | |
| 185 """ | |
| 186 diffHeader = self.makeFormat(fg=self.textColor, | |
| 187 bg=self.headerColor) | |
| 188 diffHeaderBold = self.makeFormat(fg=self.textColor, | |
| 189 bg=self.headerColor, | |
| 190 bold=True) | |
| 191 diffContext = self.makeFormat(fg=self.textColor, | |
| 192 bg=self.contextColor) | |
| 193 | |
| 194 diffAdded = self.makeFormat(fg=self.textColor, | |
| 195 bg=self.addedColor) | |
| 196 diffRemoved = self.makeFormat(fg=self.textColor, | |
| 197 bg=self.removedColor) | |
| 198 | |
| 199 if self.whitespace: | |
| 200 try: | |
| 201 badWhitespace = self.makeFormat(fg=self.textColor, | |
| 202 bg=self.whitespaceColor) | |
| 203 except AttributeError: | |
| 204 badWhitespace = self.makeFormat(fg=self.textColor, | |
| 205 bg=QColor(255, 0, 0, 192)) | |
| 206 | |
| 207 # We specify the whitespace rule last so that it is | |
| 208 # applied after the diff addition/removal rules. | |
| 209 diffOldRegex = TERMINAL(r'^--- ') | |
| 210 diffNewRegex = TERMINAL(r'^\+\+\+ ') | |
| 211 diffContextRegex = TERMINAL(r'^@@ ') | |
| 212 | |
| 213 diffHeader1Regex = TERMINAL(r'^diff --git a/.*b/.*') | |
| 214 diffHeader2Regex = TERMINAL(r'^index \S+\.\.\S+') | |
| 215 diffHeader3Regex = TERMINAL(r'^new file mode') | |
| 216 diffHeader4Regex = TERMINAL(r'^deleted file mode') | |
| 217 | |
| 218 diffAddedRegex = TERMINAL(r'^\+') | |
| 219 diffRemovedRegex = TERMINAL(r'^-') | |
| 220 diffBarRegex = TERMINAL(r'^([ ]+.*)(\|[ ]+\d+[ ]+[+-]+)$') | |
| 221 diffStsRegex = (r'(.+\|.+?)(\d+)(.+?)([\+]*?)([-]*?)$') | |
| 222 diffSummaryRegex = (r'(\s+\d+ files changed[^\d]*)' | |
| 223 r'(:?\d+ insertions[^\d]*)' | |
| 224 r'(:?\d+ deletions.*)$') | |
| 225 | |
| 226 if self.whitespace: | |
| 227 self.createRules((r'(..*?)(\s+)$', (None, badWhitespace))) | |
| 228 self.createRules((diffOldRegex, diffRemoved), | |
| 229 (diffNewRegex, diffAdded), | |
| 230 (diffContextRegex, diffContext), | |
| 231 (diffBarRegex, (diffHeaderBold, diffHeader)), | |
| 232 (diffHeader1Regex, diffHeader), | |
| 233 (diffHeader2Regex, diffHeader), | |
| 234 (diffHeader3Regex, diffHeader), | |
| 235 (diffHeader4Regex, diffHeader), | |
| 236 (diffAddedRegex, diffAdded), | |
| 237 (diffRemovedRegex, diffRemoved), | |
| 238 (diffStsRegex, (None, diffHeader, | |
| 239 None, diffHeader, | |
| 240 diffHeader)), | |
| 241 (diffSummaryRegex, (diffHeader, | |
| 242 diffHeader, | |
| 243 diffHeader)) | |
| 244 ) |
