Add QTextListFormat::start: html and markdown ordered list index offset

This is useful for a lot of applications that render text coming from
sources which already support arbitrarily numbered lists (like chat
applications for example). Application-side workarounds usually have
significant overhead; and this feature has been requested multiple times.

It should be possible to both read and write HTML with the <ol start="x">
attribute, and read and write Markdown with arbitrary numbers for the
first item in a list.

[ChangeLog][QtGui] QTextList now supports specifying a start index using
the new QTextList::{setStart, start} functions. The HTML start attribute
on ordered lists in rich text documents is now parsed and used when
rendering a text list. Non-negative indices in markdown lists are now
also parsed and written properly. This allows starting a list with a
different number than 1.

Fixes: QTBUG-30407
Fixes: QTBUG-65384
Task-number: QTBUG-107562
Change-Id: Ib35b9378d9134ffedaa2d92f728b0984793aa7c1
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gui/text/qtextmarkdownimporter.cpp b/src/gui/text/qtextmarkdownimporter.cpp
index 8838568fd0..bb95678ef1 100644
--- a/src/gui/text/qtextmarkdownimporter.cpp
+++ b/src/gui/text/qtextmarkdownimporter.cpp
@@ -227,7 +227,8 @@ int QTextMarkdownImporter::cbEnterBlock(int blockType, void *det)
         m_listFormat.setIndent(m_listStack.size() + 1);
         m_listFormat.setNumberSuffix(QChar::fromLatin1(detail->mark_delimiter));
         m_listFormat.setStyle(QTextListFormat::ListDecimal);
-        qCDebug(lcMD, "OL xx%d level %d", detail->mark_delimiter, int(m_listStack.size()) + 1);
+        m_listFormat.setStart(detail->start);
+        qCDebug(lcMD, "OL xx%d level %d start %d", detail->mark_delimiter, int(m_listStack.size()) + 1, detail->start);
     } break;
     case MD_BLOCK_TD: {
         MD_BLOCK_TD_DETAIL *detail = static_cast<MD_BLOCK_TD_DETAIL *>(det);