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[BUGFIX] Respect language based style names on reading Word files
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Microsoft Office saves Office document with language based style
mappings for default styles. For example, if a german based Word
version is used, it writes following to the `word/styles.xml` in
the container archive (*.docs):

```
<w:style w:type="paragraph" w:styleId="berschrift1">
  <w:name w:val="heading 1"/>
  ....
  </w:style>
```

versus for a english based version it would be:

```
<w:style w:type="paragraph" w:styleId="Heading1">
  <w:name w:val="heading 1"/>
  ...
</w:style>
```

The value of `<w:name />` defines the internal native code
identifier, whereas the `w:styleId` attribute on the outer
`<w:style />` tag would describe the virtual or alias name.

Later parsing of the document structure, for example the
paragraphs, references the alias (`w:styleId`) name of a
style. The reader code uses hardcoded RegEx matchings in
a case-insensitive manner but using the englisch speaking
variant (`Header\s+d`) - on the language based one, which
would not match at all.

Therefore, multiple tasks need to be done and contained
in this change:

* A alias map is implementend and used to register title
  aliases. Along with this corresponding lookup method is
  added.
* Use the lookup method to resolve for alias where the
  hardcoded language RegEx is needed to be used.
* Gathering all style alias names during reading the
  wordfile styles settings for all possible styles.
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@sbuerk
sbuerk committed Apr 2, 2024
1 parent 8b891bb commit 13a5d65
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Showing 3 changed files with 87 additions and 11 deletions.
15 changes: 11 additions & 4 deletions src/PhpWord/Reader/Word2007/AbstractPart.php
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
use PhpOffice\PhpWord\Element\TrackChange;
use PhpOffice\PhpWord\PhpWord;
use PhpOffice\PhpWord\Shared\XMLReader;
use PhpOffice\PhpWord\Style;

/**
* Abstract part reader.
Expand Down Expand Up @@ -290,14 +291,20 @@ protected function readParagraph(XMLReader $xmlReader, DOMElement $domNode, $par
private function getHeadingDepth(?array $paragraphStyle = null)
{
if (is_array($paragraphStyle) && isset($paragraphStyle['styleName'])) {
if ('Title' === $paragraphStyle['styleName']) {
// Title styles have a special handling in the styles.xms loading and registration, therefore we need to
// use the alias for it here to properly check for the correct systeling.
/** @see Style::addTitleStyle() */
/** @see Styles::read() */
$checkStyleName = Style::findAliasForStyleName($paragraphStyle['styleName']);
// Title does not have a depth, early return.
if ('Title' === $checkStyleName) {
return 0;
}

$headingMatches = [];
preg_match('/Heading(\d)/', $paragraphStyle['styleName'], $headingMatches);
// We need to support here multiple variants: 'Heading 1' , 'Heading_1', 'Heading1'
preg_match('/Heading([_\s]*)(\d)/', $checkStyleName, $headingMatches);
if (!empty($headingMatches)) {
return $headingMatches[1];
return $headingMatches[2];
}
}

Expand Down
29 changes: 22 additions & 7 deletions src/PhpWord/Reader/Word2007/Styles.php
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@

use PhpOffice\PhpWord\PhpWord;
use PhpOffice\PhpWord\Shared\XMLReader;
use PhpOffice\PhpWord\Style;
use PhpOffice\PhpWord\Style\Language;

/**
Expand Down Expand Up @@ -65,8 +66,17 @@ public function read(PhpWord $phpWord): void
foreach ($nodes as $node) {
$type = $xmlReader->getAttribute('w:type', $node);
$name = $xmlReader->getAttribute('w:val', $node, 'w:name');
if (null === $name) {
$name = $xmlReader->getAttribute('w:styleId', $node);
$alias = $xmlReader->getAttribute('w:styleId', $node);
if (null === $name && null === $alias) {
// no name or alias, skip it as matching would not possible otherwise.
continue;
}
if (null === $name && null !== $alias) {
// fully custom style, use alias as name.
$name = $alias;
}
if (null !== $name && null === $alias) {
$alias = $name;
}
$headingMatches = [];
preg_match('/Heading\s*(\d)/i', $name, $headingMatches);
Expand All @@ -76,29 +86,34 @@ public function read(PhpWord $phpWord): void
$paragraphStyle = $this->readParagraphStyle($xmlReader, $node);
$fontStyle = $this->readFontStyle($xmlReader, $node);
if (!empty($headingMatches)) {
$phpWord->addTitleStyle($headingMatches[1], $fontStyle, $paragraphStyle);
$titleStyleName = $phpWord->addTitleStyle($headingMatches[1], $fontStyle, $paragraphStyle)->getStyleName();
Style::addStyleNameAlias($alias, $titleStyleName);
} else {
if (empty($fontStyle)) {
if (is_array($paragraphStyle)) {
$phpWord->addParagraphStyle($name, $paragraphStyle);
$paragraphStyleName = $phpWord->addParagraphStyle($name, $paragraphStyle)->getStyleName();
Style::addStyleNameAlias($alias, $paragraphStyleName);
}
} else {
$phpWord->addFontStyle($name, $fontStyle, $paragraphStyle);
$fontStyleName = $phpWord->addFontStyle($name, $fontStyle, $paragraphStyle)->getStyleName();
Style::addStyleNameAlias($alias, $fontStyleName);
}
}

break;
case 'character':
$fontStyle = $this->readFontStyle($xmlReader, $node);
if (!empty($fontStyle)) {
$phpWord->addFontStyle($name, $fontStyle);
$fontStyleName = $phpWord->addFontStyle($name, $fontStyle)->getStyleName();
Style::addStyleNameAlias($alias, $fontStyleName);
}

break;
case 'table':
$tStyle = $this->readTableStyle($xmlReader, $node);
if (!empty($tStyle)) {
$phpWord->addTableStyle($name, $tStyle);
$tableStyleName = $phpWord->addTableStyle($name, $tStyle)->getStyleName();
Style::addStyleNameAlias($alias, $tableStyleName);
}

break;
Expand Down
54 changes: 54 additions & 0 deletions src/PhpWord/Style.php
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,13 @@ class Style
*/
private static $styles = [];

/**
* Mapping style name to internal code identifier.
*
* @var array<string, string>
*/
private static $nameToIdentifierMapping = [];

/**
* Add paragraph style.
*
Expand Down Expand Up @@ -124,6 +131,52 @@ public static function addTableStyle($styleName, $styleTable, $styleFirstRow = n
return self::setStyleValues($styleName, new Table($styleTable, $styleFirstRow), null);
}

/**
* Add a styleName to identifier mapping entry.
*
* @param string $alias
* @param string $styleName
*
* @see self::resolveStyleNameIdentifier()
*/
public static function addStyleNameAlias($alias, $styleName): void
{
self::$nameToIdentifierMapping[$alias] = $styleName;
}

/**
* Find the correct for a specified $alias. If $alias is a validName, it is returned. Otherwise, it will return
* the styleName for the alias if one is found, and a empty string if nothing could be found.
*
* @param string $alias
*
* @return string
*/
public static function findStyleNameForAlias($alias)
{
foreach (self::$nameToIdentifierMapping as $alias => $mappedStyleName) {
if ($mappedStyleName === $alias) {
return $alias;
}
}

return '';
}

/**
* Returns the alias for a specific $styleName. If no alias could be found, $styleName is returned.
*
* @param string $styleName
*
* @return string
*/
public static function findAliasForStyleName($styleName)
{
return (isset(self::$nameToIdentifierMapping[$styleName]) && !empty(self::$nameToIdentifierMapping[$styleName]))
? self::$nameToIdentifierMapping[$styleName]
: $styleName;
}

/**
* Count styles.
*
Expand All @@ -144,6 +197,7 @@ public static function countStyles()
public static function resetStyles(): void
{
self::$styles = [];
self::$nameToIdentifierMapping = [];
}

/**
Expand Down

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