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Optimize wrapping lines in wxRichTextCtrl

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When wrapping long text into multiple lines, avoid unnecessary
GetFirstLineBreakPosition calls for each wrapped line, leading to
quadratic complexity.

Closes https://github.com/wxWidgets/wxWidgets/pull/1567
This commit is contained in:
mehmets
2019-09-27 02:33:30 +03:00
committed by Vadim Zeitlin
parent f46a5423ae
commit 9c291ffbbc
1 changed files with 3 additions and 1 deletions
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4
src/richtext/richtextbuffer.cpp
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@@ -5099,6 +5099,7 @@ bool wxRichTextParagraph::Layout(wxDC& dc, wxRichTextDrawingContext& context, co
// continue.
wxRect availableRect;
long nextBreakPos = GetFirstLineBreakPosition(lastEndPos+1);
node = m_children.GetFirst();
while (node)
@@ -5127,7 +5128,8 @@ bool wxRichTextParagraph::Layout(wxDC& dc, wxRichTextDrawingContext& context, co
// and found a suitable point some way into the child. So get the size for the fragment
// if necessary.
long nextBreakPos = GetFirstLineBreakPosition(lastEndPos+1);
if (nextBreakPos > -1 && nextBreakPos < lastEndPos+1)
nextBreakPos = GetFirstLineBreakPosition(lastEndPos+1);
long lastPosToUse = child->GetRange().GetEnd();
bool lineBreakInThisObject = (nextBreakPos > -1 && nextBreakPos <= child->GetRange().GetEnd());