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Don't delete composite objects when defragmenting

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75099 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart 2013-10-29 13:18:15 +00:00
parent a026533712
commit 1a35779dcd
1 changed files with 68 additions and 63 deletions
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131
src/richtext/richtextbuffer.cpp
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@ -1430,83 +1430,88 @@ bool wxRichTextCompositeObject::Defragment(wxRichTextDrawingContext& context, co
{
wxRichTextCompositeObject* composite = wxDynamicCast(child, wxRichTextCompositeObject);
if (composite)
composite->Defragment(context);
// Optimization: if there are no virtual attributes, we won't need to
// to split objects in order to paint individually attributed chunks.
// So only merge in this case.
if (!context.GetVirtualAttributesEnabled())
{
if (node->GetNext())
composite->Defragment(context);
node = node->GetNext();
}
else
{
// Optimization: if there are no virtual attributes, we won't need to
// to split objects in order to paint individually attributed chunks.
// So only merge in this case.
if (!context.GetVirtualAttributesEnabled())
{
wxRichTextObject* nextChild = node->GetNext()->GetData();
if (child->CanMerge(nextChild, context) && child->Merge(nextChild, context))
if (node->GetNext())
{
nextChild->Dereference();
m_children.Erase(node->GetNext());
wxRichTextObject* nextChild = node->GetNext()->GetData();
if (child->CanMerge(nextChild, context) && child->Merge(nextChild, context))
{
nextChild->Dereference();
m_children.Erase(node->GetNext());
}
else
node = node->GetNext();
}
else
node = node->GetNext();
}
else
node = node->GetNext();
}
else
{
// If we might have virtual attributes, we first see if we have to split
// objects so that they may be painted with potential virtual attributes,
// since text objects can only draw or measure with a single attributes object
// at a time.
wxRichTextObject* childAfterSplit = child;
if (child->CanSplit(context))
{
childAfterSplit = child->Split(context);
node = m_children.Find(childAfterSplit);
}
if (node->GetNext())
{
wxRichTextObject* nextChild = node->GetNext()->GetData();
// First split child and nextChild so we have smaller fragments to merge.
// Then Merge only has to test per-object virtual attributes
// because for an object with all the same sub-object attributes,
// then any general virtual attributes should be merged with sub-objects by
// the implementation.
wxRichTextObject* nextChildAfterSplit = nextChild;
if (nextChildAfterSplit->CanSplit(context))
nextChildAfterSplit = nextChild->Split(context);
bool splitNextChild = nextChild != nextChildAfterSplit;
// See if we can merge this new fragment with (perhaps the first part of) the next object.
// Note that we use nextChild because if we had split nextChild, the first object always
// remains (and further parts are appended). However we must use childAfterSplit since
// it's the last part of a possibly split child.
if (childAfterSplit->CanMerge(nextChild, context) && childAfterSplit->Merge(nextChild, context))
// If we might have virtual attributes, we first see if we have to split
// objects so that they may be painted with potential virtual attributes,
// since text objects can only draw or measure with a single attributes object
// at a time.
wxRichTextObject* childAfterSplit = child;
if (child->CanSplit(context))
{
nextChild->Dereference();
m_children.Erase(node->GetNext());
childAfterSplit = child->Split(context);
node = m_children.Find(childAfterSplit);
}
// Don't set node -- we'll see if we can merge again with the next
// child. UNLESS we split this or the next child, in which case we know we have to
// move on to the end of the next child.
if (splitNextChild)
node = m_children.Find(nextChildAfterSplit);
if (node->GetNext())
{
wxRichTextObject* nextChild = node->GetNext()->GetData();
// First split child and nextChild so we have smaller fragments to merge.
// Then Merge only has to test per-object virtual attributes
// because for an object with all the same sub-object attributes,
// then any general virtual attributes should be merged with sub-objects by
// the implementation.
wxRichTextObject* nextChildAfterSplit = nextChild;
if (nextChildAfterSplit->CanSplit(context))
nextChildAfterSplit = nextChild->Split(context);
bool splitNextChild = nextChild != nextChildAfterSplit;
// See if we can merge this new fragment with (perhaps the first part of) the next object.
// Note that we use nextChild because if we had split nextChild, the first object always
// remains (and further parts are appended). However we must use childAfterSplit since
// it's the last part of a possibly split child.
if (childAfterSplit->CanMerge(nextChild, context) && childAfterSplit->Merge(nextChild, context))
{
nextChild->Dereference();
m_children.Erase(node->GetNext());
// Don't set node -- we'll see if we can merge again with the next
// child. UNLESS we split this or the next child, in which case we know we have to
// move on to the end of the next child.
if (splitNextChild)
node = m_children.Find(nextChildAfterSplit);
}
else
{
if (splitNextChild)
node = m_children.Find(nextChildAfterSplit); // start from the last object in the split
else
node = node->GetNext();
}
}
else
{
if (splitNextChild)
node = m_children.Find(nextChildAfterSplit); // start from the last object in the split
else
node = node->GetNext();
}
node = node->GetNext();
}
else
node = node->GetNext();
}
}
else