tdf#86790: Add support for a word-style styleref

STYLEREF is a field type in Word which changes its content based on
nearby paragraphs. For example, upon creating a styleref referencing
"Heading 1" you will see the text of the nearest "Heading 1"-styled
paragraph that is above the field.

This patch implements STYLEREF in Writer as a cross-reference. By using
"insert>cross-reference>styles" you'll be presented with a list of
styles. Selecting one and clicking "insert" will create a field which
has text from the "most relevant" instance of the style. To find the
most relevant instance we first search up for paragraphs with the style,
and if there are any we take the closest. If there weren't any, we
search down for paragraphs with the style.

This patch also updates our use of STYLEREF for chapters exported to
docx by using it for all chapters not only those in headers and footers.
This allows us to approximate more chapter field functionality even when
moving between Writer and Word.

Still TODO:
- [  ] Update documentation
- [  ] Implement reverse-searching (\l) and nondelimiter
suppression (\t)
- Probably these 2 will be in a followup patch

Change-Id: I25dd7a6940abee5651a784b9059fe23b32547d6c
Signed-off-by: Skyler Grey <skyler.grey@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156912
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/xmloff/source/text/txtfldi.cxx b/xmloff/source/text/txtfldi.cxx
index 05d95281ef1b..d51d1fb06316 100644
--- a/xmloff/source/text/txtfldi.cxx
+++ b/xmloff/source/text/txtfldi.cxx
@@ -407,6 +407,7 @@ XMLTextFieldImportContext::CreateTextFieldImportContext(
         case XML_ELEMENT(TEXT, XML_BOOKMARK_REF):
         case XML_ELEMENT(TEXT, XML_NOTE_REF):
         case XML_ELEMENT(TEXT, XML_SEQUENCE_REF):
+        case XML_ELEMENT(TEXT, XML_STYLE_REF):
             pContext = new XMLReferenceFieldImportContext( rImport, rHlp, nToken );
             break;
 
@@ -2509,6 +2510,9 @@ void XMLReferenceFieldImportContext::startFastElement(
         case XML_ELEMENT(TEXT, XML_SEQUENCE_REF):
             nSource = ReferenceFieldSource::SEQUENCE_FIELD;
             break;
+        case XML_ELEMENT(TEXT, XML_STYLE_REF):
+            nSource = ReferenceFieldSource::STYLE;
+            break;
         default:
             XMLOFF_WARN_UNKNOWN_ELEMENT("xmloff", nElementToken);
             bTypeOK = false;
@@ -2577,6 +2581,7 @@ void XMLReferenceFieldImportContext::PrepareField(
     {
         case XML_ELEMENT(TEXT, XML_REFERENCE_REF):
         case XML_ELEMENT(TEXT, XML_BOOKMARK_REF):
+        case XML_ELEMENT(LO_EXT, XML_STYLE_REF):
             xPropertySet->setPropertyValue("SourceName", Any(sName));
             break;