1 | /* |
2 | SPDX-FileCopyrightText: 2008 Paul Giannaros <paul@giannaros.org> |
3 | SPDX-FileCopyrightText: 2009-2018 Dominik Haumann <dhaumann@kde.org> |
4 | SPDX-FileCopyrightText: 2010 Joseph Wenninger <jowenn@kde.org> |
5 | SPDX-FileCopyrightText: 2025 Mirian Margiani <mixosaurus+kde@pm.me> |
6 | |
7 | SPDX-License-Identifier: LGPL-2.0-or-later |
8 | */ |
9 | |
10 | #include "katescript.h" |
11 | |
12 | #include "katepartdebug.h" |
13 | #include "katescriptdocument.h" |
14 | #include "katescripteditor.h" |
15 | #include "katescripthelpers.h" |
16 | #include "katescriptview.h" |
17 | #include "kateview.h" |
18 | |
19 | #include <KLocalizedString> |
20 | #include <iostream> |
21 | |
22 | #include <QFile> |
23 | #include <QFileInfo> |
24 | #include <QJSEngine> |
25 | #include <QQmlEngine> |
26 | |
27 | KateScript::KateScript(const QString &urlOrScript, enum InputType inputType) |
28 | : m_url(inputType == InputURL ? urlOrScript : QString()) |
29 | , m_inputType(inputType) |
30 | , m_script(inputType == InputSCRIPT ? urlOrScript : QString()) |
31 | { |
32 | } |
33 | |
34 | KateScript::~KateScript() |
35 | { |
36 | if (m_loadSuccessful) { |
37 | // remove data... |
38 | delete m_editor; |
39 | delete m_document; |
40 | delete m_view; |
41 | delete m_engine; |
42 | } |
43 | } |
44 | |
45 | QString KateScript::backtrace(const QJSValue &error, const QString &) |
46 | { |
47 | QString bt; |
48 | if (!header.isNull()) { |
49 | bt += header + QLatin1String(":\n" ); |
50 | } |
51 | if (error.isError()) { |
52 | bt += error.toString() + QLatin1String("\nStrack trace:\n" ) + error.property(QStringLiteral("stack" )).toString(); |
53 | } |
54 | |
55 | return bt; |
56 | } |
57 | |
58 | void KateScript::displayBacktrace(const QJSValue &error, const QString &) |
59 | { |
60 | if (!m_engine) { |
61 | std::cerr << "KateScript::displayBacktrace: no engine, cannot display error\n" ; |
62 | return; |
63 | } |
64 | std::cerr << "\033[31m" << qPrintable(backtrace(error, header)) << "\033[0m" << '\n'; |
65 | } |
66 | |
67 | void KateScript::clearExceptions() |
68 | { |
69 | if (!load()) { |
70 | return; |
71 | } |
72 | } |
73 | |
74 | QJSValue KateScript::global(const QString &name) |
75 | { |
76 | // load the script if necessary |
77 | if (!load()) { |
78 | return QJSValue::UndefinedValue; |
79 | } |
80 | return m_engine->globalObject().property(name); |
81 | } |
82 | |
83 | QJSValue KateScript::function(const QString &name) |
84 | { |
85 | QJSValue value = global(name); |
86 | if (!value.isCallable()) { |
87 | return QJSValue::UndefinedValue; |
88 | } |
89 | return value; |
90 | } |
91 | |
92 | bool KateScript::load() |
93 | { |
94 | if (m_loaded) { |
95 | return m_loadSuccessful; |
96 | } |
97 | |
98 | m_loaded = true; |
99 | m_loadSuccessful = false; // here set to false, and at end of function to true |
100 | |
101 | // read the script file into memory |
102 | QString source; |
103 | if (m_inputType == InputURL) { |
104 | if (!Kate::Script::readFile(sourceUrl: m_url, sourceCode&: source)) { |
105 | return false; |
106 | } |
107 | } else { |
108 | source = m_script; |
109 | } |
110 | |
111 | // create script engine, register meta types |
112 | m_engine = new QJSEngine(); |
113 | |
114 | // export read & require function and add the require guard object |
115 | auto scriptHelper = new Kate::ScriptHelper(m_engine); |
116 | QJSValue functions = m_engine->newQObject(object: scriptHelper); |
117 | m_engine->globalObject().setProperty(QStringLiteral("functions" ), value: functions); |
118 | m_engine->globalObject().setProperty(QStringLiteral("read" ), value: functions.property(QStringLiteral("read" ))); |
119 | m_engine->globalObject().setProperty(QStringLiteral("require" ), value: functions.property(QStringLiteral("require" ))); |
120 | m_engine->globalObject().setProperty(QStringLiteral("require_guard" ), value: m_engine->newObject()); |
121 | |
122 | // View and Document expose JS Range objects in the API, which will fail to work |
123 | // if Range is not included. range.js includes cursor.js |
124 | scriptHelper->require(QStringLiteral("range.js" )); |
125 | |
126 | // export debug function |
127 | m_engine->globalObject().setProperty(QStringLiteral("debug" ), value: functions.property(QStringLiteral("debug" ))); |
128 | |
129 | // export translation functions |
130 | m_engine->globalObject().setProperty(QStringLiteral("i18n" ), value: functions.property(QStringLiteral("_i18n" ))); |
131 | m_engine->globalObject().setProperty(QStringLiteral("i18nc" ), value: functions.property(QStringLiteral("_i18nc" ))); |
132 | m_engine->globalObject().setProperty(QStringLiteral("i18np" ), value: functions.property(QStringLiteral("_i18np" ))); |
133 | m_engine->globalObject().setProperty(QStringLiteral("i18ncp" ), value: functions.property(QStringLiteral("_i18ncp" ))); |
134 | |
135 | // register default styles as ds* global properties |
136 | m_engine->globalObject().setProperty(QStringLiteral("dsNormal" ), value: KSyntaxHighlighting::Theme::TextStyle::Normal); |
137 | m_engine->globalObject().setProperty(QStringLiteral("dsKeyword" ), value: KSyntaxHighlighting::Theme::TextStyle::Keyword); |
138 | m_engine->globalObject().setProperty(QStringLiteral("dsFunction" ), value: KSyntaxHighlighting::Theme::TextStyle::Function); |
139 | m_engine->globalObject().setProperty(QStringLiteral("dsVariable" ), value: KSyntaxHighlighting::Theme::TextStyle::Variable); |
140 | m_engine->globalObject().setProperty(QStringLiteral("dsControlFlow" ), value: KSyntaxHighlighting::Theme::TextStyle::ControlFlow); |
141 | m_engine->globalObject().setProperty(QStringLiteral("dsOperator" ), value: KSyntaxHighlighting::Theme::TextStyle::Operator); |
142 | m_engine->globalObject().setProperty(QStringLiteral("dsBuiltIn" ), value: KSyntaxHighlighting::Theme::TextStyle::BuiltIn); |
143 | m_engine->globalObject().setProperty(QStringLiteral("dsExtension" ), value: KSyntaxHighlighting::Theme::TextStyle::Extension); |
144 | m_engine->globalObject().setProperty(QStringLiteral("dsPreprocessor" ), value: KSyntaxHighlighting::Theme::TextStyle::Preprocessor); |
145 | m_engine->globalObject().setProperty(QStringLiteral("dsAttribute" ), value: KSyntaxHighlighting::Theme::TextStyle::Attribute); |
146 | m_engine->globalObject().setProperty(QStringLiteral("dsChar" ), value: KSyntaxHighlighting::Theme::TextStyle::Char); |
147 | m_engine->globalObject().setProperty(QStringLiteral("dsSpecialChar" ), value: KSyntaxHighlighting::Theme::TextStyle::SpecialChar); |
148 | m_engine->globalObject().setProperty(QStringLiteral("dsString" ), value: KSyntaxHighlighting::Theme::TextStyle::String); |
149 | m_engine->globalObject().setProperty(QStringLiteral("dsVerbatimString" ), value: KSyntaxHighlighting::Theme::TextStyle::VerbatimString); |
150 | m_engine->globalObject().setProperty(QStringLiteral("dsSpecialString" ), value: KSyntaxHighlighting::Theme::TextStyle::SpecialString); |
151 | m_engine->globalObject().setProperty(QStringLiteral("dsImport" ), value: KSyntaxHighlighting::Theme::TextStyle::Import); |
152 | m_engine->globalObject().setProperty(QStringLiteral("dsDataType" ), value: KSyntaxHighlighting::Theme::TextStyle::DataType); |
153 | m_engine->globalObject().setProperty(QStringLiteral("dsDecVal" ), value: KSyntaxHighlighting::Theme::TextStyle::DecVal); |
154 | m_engine->globalObject().setProperty(QStringLiteral("dsBaseN" ), value: KSyntaxHighlighting::Theme::TextStyle::BaseN); |
155 | m_engine->globalObject().setProperty(QStringLiteral("dsFloat" ), value: KSyntaxHighlighting::Theme::TextStyle::Float); |
156 | m_engine->globalObject().setProperty(QStringLiteral("dsConstant" ), value: KSyntaxHighlighting::Theme::TextStyle::Constant); |
157 | m_engine->globalObject().setProperty(QStringLiteral("dsComment" ), value: KSyntaxHighlighting::Theme::TextStyle::Comment); |
158 | m_engine->globalObject().setProperty(QStringLiteral("dsDocumentation" ), value: KSyntaxHighlighting::Theme::TextStyle::Documentation); |
159 | m_engine->globalObject().setProperty(QStringLiteral("dsAnnotation" ), value: KSyntaxHighlighting::Theme::TextStyle::Annotation); |
160 | m_engine->globalObject().setProperty(QStringLiteral("dsCommentVar" ), value: KSyntaxHighlighting::Theme::TextStyle::CommentVar); |
161 | m_engine->globalObject().setProperty(QStringLiteral("dsRegionMarker" ), value: KSyntaxHighlighting::Theme::TextStyle::RegionMarker); |
162 | m_engine->globalObject().setProperty(QStringLiteral("dsInformation" ), value: KSyntaxHighlighting::Theme::TextStyle::Information); |
163 | m_engine->globalObject().setProperty(QStringLiteral("dsWarning" ), value: KSyntaxHighlighting::Theme::TextStyle::Warning); |
164 | m_engine->globalObject().setProperty(QStringLiteral("dsAlert" ), value: KSyntaxHighlighting::Theme::TextStyle::Alert); |
165 | m_engine->globalObject().setProperty(QStringLiteral("dsOthers" ), value: KSyntaxHighlighting::Theme::TextStyle::Others); |
166 | m_engine->globalObject().setProperty(QStringLiteral("dsError" ), value: KSyntaxHighlighting::Theme::TextStyle::Error); |
167 | |
168 | // register scripts itself |
169 | QJSValue result = m_engine->evaluate(program: source, fileName: m_url); |
170 | if (hasException(object: result, file: m_url)) { |
171 | return false; |
172 | } |
173 | |
174 | // AFTER SCRIPT: set the view/document objects as necessary |
175 | m_engine->globalObject().setProperty(QStringLiteral("editor" ), value: m_engine->newQObject(object: m_editor = new KateScriptEditor())); |
176 | m_engine->globalObject().setProperty(QStringLiteral("document" ), value: m_engine->newQObject(object: m_document = new KateScriptDocument(m_engine))); |
177 | m_engine->globalObject().setProperty(QStringLiteral("view" ), value: m_engine->newQObject(object: m_view = new KateScriptView(m_engine))); |
178 | |
179 | // yip yip! |
180 | m_loadSuccessful = true; |
181 | |
182 | return true; |
183 | } |
184 | |
185 | QJSValue KateScript::evaluate(const QString &program, const FieldMap &env) |
186 | { |
187 | if (!load()) { |
188 | qCWarning(LOG_KTE) << "load of script failed:" << program; |
189 | return QJSValue(); |
190 | } |
191 | |
192 | // JS reserved words that are not allowed as variable names |
193 | // source: https://web.archive.org/web/20250415020612/https://www.w3schools.com/js/js_reserved.asp |
194 | // exceptions: Java Reserved Words, Other Reserved Words, HTML Event Handlers, |
195 | // plus "length", "name", "prototype", "hasOwnProperty", "package" |
196 | static const auto invalidRe = |
197 | QRegularExpression{QStringLiteral("^(Array|Date|Infinity|Math|NaN|Number|Object|String|abstract|arguments|await|" |
198 | "boolean|break|byte|case|catch|char|class|const|continue|debugger|default|delete|" |
199 | "do|double|else|enum|eval|export|extends|false|final|finally|float|for|function|goto|" |
200 | "if|implements|import|in|instanceof|int|interface|isFinite|isNaN|isPrototypeOf|let|long|" |
201 | "native|new|null|private|protected|public|return|short|static|super|switch|synchronized|" |
202 | "this|throw|throws|toString|transient|true|try|typeof|undefined|valueOf|" |
203 | "var|void|volatile|while|with|yield)$" )}; |
204 | static const auto validRe = QRegularExpression{QStringLiteral("^[a-zA-Z0-9_]+$" )}; |
205 | |
206 | auto filteredKeys = QStringList{}; |
207 | auto paramKeys = QStringList{}; |
208 | auto paramValues = QJSValueList{}; |
209 | paramKeys.reserve(asize: env.size()); |
210 | paramValues.reserve(asize: env.size()); |
211 | |
212 | paramKeys << QStringLiteral("__program__" ); |
213 | paramValues << program; |
214 | |
215 | auto fields = m_engine->newObject(); |
216 | |
217 | for (const auto &k : env.keys()) { |
218 | fields.setProperty(name: k, value: env[k]); |
219 | |
220 | // Skip fields that would overwrite global properties |
221 | if (m_engine->globalObject().hasProperty(name: k) || k == QStringLiteral("__program__" ) || k == QStringLiteral("fields" )) { |
222 | filteredKeys << k; |
223 | continue; |
224 | } |
225 | |
226 | auto matchValid = validRe.matchView(subjectView: k); |
227 | |
228 | if (matchValid.hasMatch()) { |
229 | auto matchInvalid = invalidRe.match(subject: k); |
230 | |
231 | if (matchInvalid.hasMatch()) { |
232 | filteredKeys << k; |
233 | continue; |
234 | } |
235 | } else { |
236 | filteredKeys << k; |
237 | continue; |
238 | } |
239 | |
240 | paramKeys << k; |
241 | paramValues << env[k]; |
242 | } |
243 | |
244 | // Export the 'fields' map so that any function has access to |
245 | // the current fields, even if the names are invalid JS identifiers |
246 | m_engine->globalObject().setProperty(QStringLiteral("fields" ), value: fields); |
247 | |
248 | // Wrap the arguments in a function to avoid polluting the global object |
249 | auto programWithContext = QStringLiteral("(function(%1){ return eval(__program__); })" ).arg(a: paramKeys.join(sep: QLatin1Char(','))); |
250 | |
251 | auto programFunction = m_engine->evaluate(program: programWithContext); |
252 | QJSValue result; |
253 | |
254 | if (programFunction.isCallable()) { |
255 | result = programFunction.call(args: paramValues); |
256 | } else { |
257 | qCWarning(LOG_KTE) << "Error evaluating script: " << programWithContext; |
258 | result = QStringLiteral("Bug: unable to evaluate script" ); |
259 | } |
260 | |
261 | if (result.isError()) { |
262 | if (result.errorType() == QJSValue::ReferenceError) { |
263 | auto var = result.property(QStringLiteral("message" )).toString().split(sep: QLatin1Char(' '))[0]; |
264 | |
265 | if (filteredKeys.contains(str: var)) { |
266 | result = QStringLiteral("SyntaxError: access %1 through the fields map" ).arg(a: var); |
267 | } |
268 | } |
269 | |
270 | qCWarning(LOG_KTE) << "Error evaluating script: " << result.toString(); |
271 | } |
272 | |
273 | // Reset the 'fields' map to clean up the global object |
274 | m_engine->globalObject().deleteProperty(QStringLiteral("fields" )); |
275 | |
276 | return result; |
277 | } |
278 | |
279 | bool KateScript::hasException(const QJSValue &object, const QString &file) |
280 | { |
281 | if (object.isError()) { |
282 | m_errorMessage = i18n("Error loading script %1: %2" , file, object.toString()); |
283 | displayBacktrace(error: object, header: m_errorMessage); |
284 | delete m_engine; |
285 | m_engine = nullptr; |
286 | m_loadSuccessful = false; |
287 | return true; |
288 | } |
289 | return false; |
290 | } |
291 | |
292 | bool KateScript::setView(KTextEditor::ViewPrivate *view) |
293 | { |
294 | if (!load()) { |
295 | return false; |
296 | } |
297 | // setup the stuff |
298 | m_document->setDocument(view->doc()); |
299 | m_view->setView(view); |
300 | return true; |
301 | } |
302 | |
303 | void KateScript::(const KateScriptHeader &) |
304 | { |
305 | m_generalHeader = generalHeader; |
306 | } |
307 | |
308 | KateScriptHeader &KateScript::() |
309 | { |
310 | return m_generalHeader; |
311 | } |
312 | |