MailJDTourDownloadDocsQualityTestsCoverage

Which source lines and branches the tests execute. Lines 91.5 %, branches 75.0 % (minimum 85 % and 72 %). main @ 399ffe3d · 21 October 2026 · pipeline 7238.

GCC Code Coverage Report

Directory: src/
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 88.1% 290 / 0 / 329
Functions: 93.3% 14 / 0 / 15
Branches: 78.6% 578 / 0 / 735
data/ComposeHtmlImport.cpp
Line Branch Exec Source
1 #include "ComposeHtmlImport.h"
2
3 #include <QRegularExpression>
4
5 #include "ComposeDocumentFormat.h"
6
7 #include <QTextBlock>
8 #include <QTextCursor>
9 #include <QTextDocument>
10 #include <QTextFrame>
11 #include <QTextImageFormat>
12 #include <QTextList>
13 #include <QTextTable>
14 #include <QUuid>
15 #include <QVector>
16
17 namespace {
18
19 using namespace ComposeDocumentFormat;
20
21 // No resource is ever loaded while importing (remote, cid or file).
22 class ResourceFreeDocument : public QTextDocument {
23 protected:
24 ✗ QVariant loadResource(int, const QUrl &) override { return QByteArray(); }
25 };
26
27 constexpr qreal ParagraphGap = 6.0; // a margin at least this large reads as a blank line
28 constexpr qreal IndentStep = 40.0; // MailHtmlWriter writes 40 px per indent level
29
30 3864 int remappedHeading(int level) {
31
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 3864 if (level <= 0) return 0;
32
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 65 if (level <= 2) return 1; // h1, h2 (MailHtmlWriter writes level 1 as h2)
33
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 17 if (level == 3) return 2;
34 12 return 3;
35 }
36
37 98 QTextListFormat::Style allowedListStyle(QTextListFormat::Style style) {
38
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 98 switch (style) {
39 98 case QTextListFormat::ListDisc:
40 case QTextListFormat::ListCircle:
41 case QTextListFormat::ListSquare:
42 case QTextListFormat::ListDecimal:
43 case QTextListFormat::ListLowerAlpha:
44 case QTextListFormat::ListUpperAlpha:
45 case QTextListFormat::ListLowerRoman:
46 case QTextListFormat::ListUpperRoman:
47 98 return style;
48 ✗ default:
49 ✗ return QTextListFormat::ListDisc;
50 }
51 }
52
53 3864 bool inHeaderRow(const QTextBlock &block) {
54
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 3864 QTextCursor cursor(block);
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 3864 if (QTextTable *table = cursor.currentTable()) {
56
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 314 const QTextTableCell cell = table->cellAt(cursor);
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 314 return cell.isValid() && cell.row() < table->format().headerRowCount();
58 314 }
59 3550 return false;
60 3864 }
61
62 15067 QTextCharFormat cleanCharFormat(const QTextCharFormat &source, bool heading, bool codeBlock, bool headerCell,
63 const QHash<QString, QString> &alternativeTexts) {
64
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 15067 if (source.isImageFormat()) {
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 11 const QTextImageFormat image = source.toImageFormat();
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 11 QTextImageFormat clean;
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 11 clean.setName(image.name());
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 11 if (image.width() > 0) clean.setWidth(image.width());
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 11 if (image.height() > 0) clean.setHeight(image.height());
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 11 const QString alt = image.hasProperty(ImageAltProperty) ? image.stringProperty(ImageAltProperty)
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 11 : alternativeTexts.value(image.name());
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 11 if (!alt.isEmpty()) clean.setProperty(ImageAltProperty, alt);
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 11 return clean;
74 11 }
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 15056 QTextCharFormat clean;
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 15056 const bool anchor = source.isAnchor() && isAllowedLink(source.anchorHref());
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 15056 if (source.fontWeight() >= 600 && !heading && !headerCell) clean.setFontWeight(QFont::Bold);
78
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 15056 if (source.fontItalic()) clean.setFontItalic(true);
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 15056 if (source.fontUnderline() && !anchor) clean.setFontUnderline(true);
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 15056 if (source.fontStrikeOut()) clean.setFontStrikeOut(true);
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 30112 if (source.verticalAlignment() == QTextCharFormat::AlignSuperScript ||
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 15056 source.verticalAlignment() == QTextCharFormat::AlignSubScript)
83 ✗ clean.setVerticalAlignment(source.verticalAlignment());
84
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 15056 if (anchor) {
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 2215 clean.setAnchor(true);
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 2215 clean.setAnchorHref(source.anchorHref());
87 }
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 15056 const bool codeMarker = source.fontFamilies().toStringList().contains(CodeMarkerFamily, Qt::CaseInsensitive);
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 15056 if (!codeBlock && (source.boolProperty(CodeProperty) || codeMarker || source.fontFixedPitch())) {
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 9 clean.setProperty(CodeProperty, true);
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 9 clean.setFontFixedPitch(true);
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 15047 } else if (!codeBlock) {
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 15029 const QString family = mapForeignFontFamily(source.fontFamilies().toStringList().join(QLatin1Char(',')));
94
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 15097 if (!family.isEmpty()) clean.setFontFamilies({family});
95 15029 }
96
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 15056 if (!heading && source.hasProperty(QTextFormat::FontPointSize) && source.fontPointSize() > 0)
97
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 36 clean.setFontPointSize(qBound(FontPointSizeMin, qRound(source.fontPointSize()), FontPointSizeMax));
98
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 15020 else if (!heading && source.hasProperty(QTextFormat::FontPixelSize) && source.intProperty(QTextFormat::FontPixelSize) > 0)
99 ✗ clean.setFontPointSize(qBound(FontPointSizeMin, qRound(source.intProperty(QTextFormat::FontPixelSize) * 0.75),
100 FontPointSizeMax));
101
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 30148 if (!anchor && source.hasProperty(QTextFormat::ForegroundBrush) && source.foreground().style() != Qt::NoBrush &&
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 15092 !isDefaultLikeTextColor(source.foreground().color()))
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 24 clean.setForeground(source.foreground().color());
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 30125 if (source.hasProperty(QTextFormat::BackgroundBrush) && source.background().style() != Qt::NoBrush &&
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 15069 !isDefaultLikeBackground(source.background().color()))
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 9 clean.setBackground(source.background().color());
107
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 15056 return clean;
108 15090 }
109
110 struct BlockPlan {
111 int position = 0;
112 bool blankBefore = false;
113 bool blankAfter = false;
114 };
115
116 3864 QTextBlockFormat cleanBlockFormat(const QTextBlock &block, BlockPlan &plan) {
117 3864 QTextBlockFormat format = block.blockFormat();
118
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 3864 const bool inList = block.textList() != nullptr;
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 3864 const int userState = block.userState();
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 3864 if (userState == SignatureRegion || userState == QuoteRegion) format.setProperty(RegionProperty, userState);
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 3864 format.setHeadingLevel(remappedHeading(format.headingLevel()));
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 3864 if (format.nonBreakableLines()) format.setProperty(QTextFormat::BlockCodeFence, QVariant(QChar(u'`')));
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 3864 int quote = format.intProperty(QTextFormat::BlockQuoteLevel);
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 3864 if (quote == 0 && format.leftMargin() >= 30 && format.rightMargin() >= 30)
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 2 quote = qBound(1, qRound(format.rightMargin() / IndentStep), 8); // Qt's blockquote margins
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 3864 if (quote > 0) format.setProperty(QTextFormat::BlockQuoteLevel, quote);
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 3838 else if (!inList && format.leftMargin() > 0)
128 ✗ format.setIndent(qBound(0, qRound(format.leftMargin() / IndentStep), 8));
129
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 3838 else if (!inList && format.rightMargin() > 0 && block.textDirection() == Qt::RightToLeft)
130 ✗ format.setIndent(qBound(0, qRound(format.rightMargin() / IndentStep), 8));
131
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 6705 if (!inList && quote == 0 && format.headingLevel() == 0 && !format.hasProperty(QTextFormat::BlockCodeFence) &&
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 6705 !block.text().isEmpty()) {
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 2677 plan.blankBefore = format.topMargin() >= ParagraphGap;
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 2677 plan.blankAfter = format.bottomMargin() >= ParagraphGap;
135 }
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 3864 if (format.hasProperty(QTextFormat::BlockAlignment)) {
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 322 const Qt::Alignment alignment = format.alignment() & Qt::AlignHorizontal_Mask;
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 419 if (alignment == Qt::AlignLeft || alignment == (Qt::AlignLeft | Qt::AlignAbsolute) ||
139 97 alignment == Qt::AlignLeading)
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 225 format.clearProperty(QTextFormat::BlockAlignment);
141 else
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 97 format.setAlignment(alignment & ~Qt::AlignAbsolute);
143 }
144 50232 for (const int property : {int(QTextFormat::BlockTopMargin), int(QTextFormat::BlockBottomMargin),
145 int(QTextFormat::BlockLeftMargin), int(QTextFormat::BlockRightMargin),
146 int(QTextFormat::TextIndent), int(QTextFormat::LineHeight),
147 int(QTextFormat::LineHeightType), int(QTextFormat::BackgroundBrush),
148 int(QTextFormat::BlockNonBreakableLines), int(QTextFormat::PageBreakPolicy),
149
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 54096 int(QTextFormat::TabPositions), int(QTextFormat::BlockMarker)})
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 46368 format.clearProperty(property);
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 3864 if (inList) format.clearProperty(QTextFormat::BlockIndent);
152 3864 return format;
153 ✗ }
154
155 205 void normalizeLists(QTextDocument &document) {
156 205 QSet<QTextList *> seen;
157
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 4069 for (QTextBlock block = document.begin(); block.isValid(); block = block.next()) {
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 3864 QTextList *list = block.textList();
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 3864 if (!list || seen.contains(list)) continue;
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 98 seen.insert(list);
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 98 QTextListFormat format = list->format();
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 98 QTextListFormat clean;
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 98 clean.setStyle(allowedListStyle(format.style()));
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 98 clean.setIndent(qBound(1, format.indent(), MaxListLevel));
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 98 list->setFormat(clean);
166 98 }
167 205 }
168
169 // The reader flattens tables beyond 32 columns or 128 rows into "a | b"
170 // lines (NativeMailDocument::tableFits); Qt's importer can still build one
171 // from malformed HTML (a table inside <pre>). The composer holds the same
172 // lines, so its own output imports back to the same text
173 // (fuzz_compose_html_import).
174 constexpr int MaxTableColumns = 32;
175 constexpr int MaxTableRows = 128;
176
177 205 void flattenOversizedTables(QTextDocument &document) {
178
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 205 for (int round = 0; round < 64; ++round) {
179 205 QTextTable *oversized = nullptr;
180
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 205 QList<QTextFrame *> frames = document.rootFrame()->childFrames();
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 276 while (!frames.isEmpty() && !oversized) {
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 71 QTextFrame *frame = frames.takeFirst();
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 71 frames.append(frame->childFrames());
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 71 auto *table = qobject_cast<QTextTable *>(frame);
185
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 71 if (table && (table->columns() > MaxTableColumns || table->rows() > MaxTableRows)) oversized = table;
186 }
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 205 if (!oversized) return;
188 ✗ QStringList lines;
189 ✗ for (int row = 0; row < oversized->rows(); ++row) {
190 ✗ QStringList cells;
191 ✗ for (int column = 0; column < oversized->columns(); ++column) {
192 ✗ const QTextTableCell cell = oversized->cellAt(row, column);
193 ✗ if (!cell.isValid() || cell.row() != row || cell.column() != column) continue;
194 ✗ QStringList parts;
195 ✗ for (QTextBlock block = document.findBlock(cell.firstPosition());
196 ✗ block.isValid() && block.position() <= cell.lastPosition(); block = block.next())
197 ✗ parts.append(block.text());
198 ✗ cells.append(parts.join(QLatin1Char(' ')));
199 ✗ }
200 ✗ lines.append(cells.join(QStringLiteral(" | ")));
201 ✗ }
202 ✗ QTextCursor cursor(&document);
203 ✗ cursor.setPosition(oversized->firstPosition() - 1);
204 ✗ cursor.setPosition(oversized->lastPosition() + 1, QTextCursor::KeepAnchor);
205 ✗ cursor.removeSelectedText();
206 ✗ cursor.insertText(lines.join(QChar(QChar::ParagraphSeparator)), QTextCharFormat());
207 205 }
208 }
209
210 205 void normalizeTables(QTextDocument &document) {
211
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 205 flattenOversizedTables(document);
212
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 205 QList<QTextFrame *> frames = document.rootFrame()->childFrames();
213
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 276 while (!frames.isEmpty()) {
214
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 71 QTextFrame *frame = frames.takeFirst();
215
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 71 frames.append(frame->childFrames());
216
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 71 auto *table = qobject_cast<QTextTable *>(frame);
217
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 71 if (!table) continue;
218
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 60 const QTextTableFormat source = table->format();
219
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 60 QTextTableFormat clean;
220
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 60 clean.setHeaderRowCount(qBound(0, source.headerRowCount(), table->rows()));
221
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 60 clean.setBorder(source.border() > 0 ? 1 : 0);
222
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 60 clean.setBorderStyle(QTextFrameFormat::BorderStyle_Solid);
223
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 60 clean.setBorderCollapse(true);
224
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 60 clean.setCellPadding(4);
225
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 60 clean.setCellSpacing(0);
226 60 QList<QTextLength> widths;
227
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 173 for (const QTextLength &width : source.columnWidthConstraints())
228
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 173 widths.append(width.type() == QTextLength::PercentageLength ? width : QTextLength());
229
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 60 if (!widths.isEmpty()) clean.setColumnWidthConstraints(widths);
230
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 60 table->setFormat(clean);
231 60 }
232 205 }
233
234 // Splits blocks at Shift+Enter line separators (written as <br>) so own
235 // HTML comes back as the blocks it was written from. A <br> that ends its
236 // block adds no line in a browser (<div><br></div> is one empty line), so
237 // a trailing separator is only removed.
238 205 void splitLineSeparators(QTextDocument &document) {
239
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 205 QTextCursor cursor(&document);
240 while (true) {
241
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 512 cursor = document.find(QString(QChar(0x2028)), cursor);
242
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 512 if (cursor.isNull()) break;
243
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 307 const bool trailing = cursor.selectionEnd() == cursor.block().position() + cursor.block().length() - 1;
244
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 307 const QTextBlockFormat blockFormat = cursor.blockFormat();
245
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 307 const QTextCharFormat charFormat = cursor.charFormat();
246
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 307 const int userState = cursor.block().userState();
247
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 307 cursor.removeSelectedText();
248
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 307 if (!trailing) {
249
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 207 cursor.insertBlock(blockFormat, charFormat);
250
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 207 cursor.block().setUserState(userState); // the region marker follows the line
251 }
252 307 }
253 205 }
254
255 // Blocks of spaces and non-breaking spaces only (Outlook's empty lines) are
256 // empty lines; spaces that end the document are HTML whitespace.
257 205 void clearBlankBlocks(QTextDocument &document) {
258
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 4069 for (QTextBlock block = document.begin(); block.isValid(); block = block.next()) {
259
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 3864 const QString text = block.text();
260
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 3864 if (text.isEmpty() || block.textList()) continue;
261 2790 bool blank = true;
262
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 287750 for (const QChar c : text) blank &= c == QLatin1Char(' ') || c == QChar(0x00A0) || c == QLatin1Char('\t');
263
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 2790 if (!blank) continue;
264
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 4 QTextCursor cursor(block);
265
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 4 cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
266
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 4 cursor.removeSelectedText();
267 3864 }
268
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 205 QTextBlock last = document.lastBlock();
269
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 205 const QString text = last.text();
270 205 qsizetype keep = text.size();
271
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 295 while (keep > 0 && text.at(keep - 1) == QLatin1Char(' ')) --keep;
272
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 205 if (keep < text.size()) {
273
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 90 QTextCursor cursor(last);
274
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 90 cursor.setPosition(last.position() + int(keep));
275
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 90 cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
276
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 90 cursor.removeSelectedText();
277 90 }
278 205 }
279
280 48 bool inTable(const QTextBlock &block) {
281
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 48 return QTextCursor(block).currentTable() != nullptr;
282 }
283
284 // Empty lines at the very start and end are HTML whitespace. A deletion
285 // that changes nothing (a block inside a table) ends the loop.
286 205 void trimEmptyEdges(QTextDocument &document) {
287
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 354 while (document.blockCount() > 1 && document.firstBlock().length() <= 1 && !document.firstBlock().textList() &&
288
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 368 !isHorizontalRule(document.firstBlock()) && !inTable(document.firstBlock()) &&
289
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 219 !inTable(document.firstBlock().next())) {
290 // Merging keeps the first block's format: carry the second one's over.
291 ✗ const QTextBlockFormat second = document.firstBlock().next().blockFormat();
292 ✗ const QTextCharFormat secondChars = document.firstBlock().next().charFormat();
293 ✗ const int before = document.blockCount();
294 ✗ QTextCursor cursor(document.firstBlock());
295 ✗ cursor.deleteChar();
296 ✗ if (document.blockCount() == before) break;
297 ✗ cursor.setBlockFormat(second);
298 ✗ cursor.setBlockCharFormat(secondChars);
299 ✗ }
300
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 356 while (document.blockCount() > 1 && document.lastBlock().length() <= 1 && !document.lastBlock().textList() &&
301
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 366 !isHorizontalRule(document.lastBlock()) && !inTable(document.lastBlock()) &&
302
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 216 !inTable(document.lastBlock().previous())) {
303
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 1 const int before = document.blockCount();
304
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 1 QTextCursor cursor(document.lastBlock());
305
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 1 cursor.deletePreviousChar();
306
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 1 if (document.blockCount() == before) break;
307 1 }
308 205 }
309
310 } // namespace
311
312 205 void ComposeHtmlImport::normalize(QTextDocument &document, const QHash<QString, QString> &alternativeTexts) {
313
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 205 splitLineSeparators(document);
314
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 205 clearBlankBlocks(document);
315
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 205 normalizeTables(document);
316
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 205 normalizeLists(document);
317 // Formats first (positions stay), then blank lines from paragraph margins
318 // (from the end, so earlier positions stay valid).
319 205 QVector<BlockPlan> plans;
320
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 205 QTextCursor cursor(&document);
321
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 205 cursor.beginEditBlock();
322
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 4069 for (QTextBlock block = document.begin(); block.isValid(); block = block.next()) {
323 3864 BlockPlan plan;
324
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 3864 plan.position = block.position();
325
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 3864 const QTextBlockFormat blockFormat = cleanBlockFormat(block, plan);
326
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 3864 const bool heading = blockFormat.headingLevel() > 0;
327
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 3864 const bool codeBlock = blockFormat.hasProperty(QTextFormat::BlockCodeFence);
328
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 3864 const bool headerCell = inHeaderRow(block);
329 struct Span { int start, length; QTextCharFormat format; };
330 3864 QVector<Span> spans;
331
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 18931 for (auto it = block.begin(); !it.atEnd(); ++it) {
332
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 15067 const QTextFragment fragment = it.fragment();
333
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 15067 if (fragment.isValid())
334
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 30134 spans.append({fragment.position(), fragment.length(),
335 15067 cleanCharFormat(fragment.charFormat(), heading, codeBlock, headerCell, alternativeTexts)});
336 }
337
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 3864 QTextCursor blockCursor(block);
338
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 3864 blockCursor.setBlockFormat(blockFormat);
339
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 3864 blockCursor.setBlockCharFormat(QTextCharFormat());
340
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 18931 for (const Span &span : spans) {
341
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 15067 QTextCursor spanCursor(&document);
342
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 15067 spanCursor.setPosition(span.start);
343
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 15067 spanCursor.setPosition(span.start + span.length, QTextCursor::KeepAnchor);
344
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 15067 spanCursor.setCharFormat(span.format);
345 15067 }
346
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 3864 block.setUserState(-1);
347
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 3864 plans.append(plan);
348 3864 }
349
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 4069 for (qsizetype i = plans.size() - 1; i >= 0; --i) {
350 3864 const BlockPlan &plan = plans.at(i);
351
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 3864 QTextBlock block = document.findBlock(plan.position);
352
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 3864 if (plan.blankAfter) {
353
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 1920 const QTextBlock next = block.next();
354
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 1920 if (next.isValid() && next.length() > 1) {
355
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 145 QTextCursor at(block);
356
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 145 at.movePosition(QTextCursor::EndOfBlock);
357
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 145 QTextBlockFormat plain;
358
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 145 if (block.blockFormat().hasProperty(RegionProperty))
359
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 6 plain.setProperty(RegionProperty, block.blockFormat().property(RegionProperty));
360
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 145 if (block.blockFormat().hasProperty(QTextFormat::BlockQuoteLevel))
361 ✗ plain.setProperty(QTextFormat::BlockQuoteLevel, block.blockFormat().property(QTextFormat::BlockQuoteLevel));
362
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 145 at.insertBlock(plain, QTextCharFormat());
363 145 }
364 }
365
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 3864 if (plan.blankBefore) {
366
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 1912 const QTextBlock previous = block.previous();
367
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 1912 if (previous.isValid() && previous.length() > 1) {
368
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 1807 QTextCursor at(block);
369
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 1807 at.movePosition(QTextCursor::StartOfBlock);
370
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 1807 at.insertBlock(block.blockFormat(), QTextCharFormat());
371
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 1807 QTextCursor empty(document.findBlock(plan.position));
372
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 1807 QTextBlockFormat plain;
373
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 1807 empty.setBlockFormat(plain);
374 1807 }
375 }
376 }
377
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 205 trimEmptyEdges(document);
378
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 205 cursor.endEditBlock();
379 15272 }
380
381 207 ComposeHtmlImport::Result ComposeHtmlImport::import(const QByteArray &html, const Options &options,
382 const std::atomic_bool *cancelled) {
383
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 207 Result result;
384
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 207 NativeMailDocument prepared = NativeMailDocument::prepare(html, cancelled, NativeMailDocument::Mode::Compose);
385 207 result.outcome = prepared.outcome;
386 207 result.simplified = prepared.simplified;
387
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 207 if (prepared.outcome != NativeMailDocument::Outcome::Ready) return result;
388 205 QString body = prepared.html;
389 205 QHash<QString, QString> alternativeTexts;
390
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 353 for (const auto &reference : std::as_const(prepared.imageReferences)) {
391 148 QString replacement;
392 148 const QString alt = reference.alternativeText;
393 148 QString size;
394
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 166 if (reference.width > 0) size += QStringLiteral(" width=\"%1\"").arg(reference.width);
395
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 152 if (reference.height > 0) size += QStringLiteral(" height=\"%1\"").arg(reference.height);
396
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 148 if (!reference.data.isEmpty()) {
397
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 8 const QString name = ImageScheme + QStringLiteral("pasted-") + QUuid::createUuid().toString(QUuid::Id128);
398 4 result.images.append({name, reference.data, reference.mimeType, alt});
399
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 4 alternativeTexts.insert(name, alt);
400
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 4 replacement = QStringLiteral("<img src=\"%1\"%2>").arg(name, size);
401
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 148 } else if (!reference.contentId.isEmpty() && options.contentIdImages.contains(reference.contentId)) {
402 7 const QString name = options.contentIdImages.value(reference.contentId);
403
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 7 alternativeTexts.insert(name, alt);
404
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 7 replacement = QStringLiteral("<img src=\"%1\"%2>").arg(name.toHtmlEscaped(), size);
405
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 144 } else if (!reference.remoteUrl.isEmpty()) {
406 132 ++result.remoteImagesLeftOut;
407 264 replacement = QStringLiteral("<a href=\"%1\">%2</a>")
408
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 396 .arg(reference.remoteUrl.toString(QUrl::FullyEncoded).toHtmlEscaped(),
409
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 526 (alt.isEmpty() ? QStringLiteral("[image]") : alt).toHtmlEscaped());
410 } else {
411
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 5 replacement = alt.toHtmlEscaped();
412 }
413
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 148 body.replace(reference.placeholder, replacement);
414 148 }
415
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 205 if (cancelled && cancelled->load()) {
416 ✗ result.outcome = NativeMailDocument::Outcome::Cancelled;
417 ✗ return result;
418 }
419 // C0/C1 control characters are invisible, not valid HTML text, and the
420 // writer leaves them out; dropping them here keeps an import of the
421 // composer's own output equal to the first one (fuzz_compose_html_import).
422 // (Also those written as character references: removed from the document.)
423
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 214 static const QRegularExpression controls(QStringLiteral("[\\x{1}-\\x{8}\\x{B}\\x{C}\\x{E}-\\x{1F}\\x{7F}-\\x{9F}]"));
424
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 205 body.remove(QChar(0));
425
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 205 body.remove(controls);
426
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 205 ResourceFreeDocument document;
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 205 if (options.defaultFont != QFont()) document.setDefaultFont(options.defaultFont);
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 205 document.setHtml(body);
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 205 for (QTextCursor found = document.find(controls); !found.isNull(); found = document.find(controls, found))
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 205 found.removeSelectedText();
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 205 normalize(document, alternativeTexts);
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 205 result.fragment = QTextDocumentFragment(&document);
433 // Qt 6.8 creates the fragment's root frame lazily on first traversal;
434 // materialise it on this thread (as NativeDocumentService does).
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 205 (void)result.fragment.toHtml();
436 205 return result;
437 211 }
438